VIBRATION DEVICE Technical field The present invention relates to a medical implant system, in particular a medical implant system comprising a vibration device. Background Medical devices, designed to be implanted in the body of a human, can be configured to serve various purposes in the human body. For example, the may be designed which are designed to support or stimulate various body functions. There are known medical devices intended to support weight loss. Many of them are based on the principle of distending the tissue of the stomach wall, to thereby trigger the bodily response normally obtained by eating, to thereby create an feeling of satiety and/or reduce hunger in the human. However, this approach may suffer from the fact that the body gets used to the distension, so that the bodily response is weakened. There is therefore a need for improved medical implants for the purpose of obtaining satiety and/or reducing hunger in a patient. Summary It is an object of the present inventive concept to mitigate, alleviate or eliminate one or more of the above-identified deficiencies in the art and disadvantages singly or in combination. In one aspect, there is provided system for treating obesity in a patient, comprising an implantable vibration device configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. In one embodiment, said implantable vibration device comprises a wireless energy receiver configured to receive wireless energy. In one embodiment, the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall using stomach-to-stomach sutures or staplers. In one embodiment, the system comprises the stomach-to-stomach sutures or staplers. In one embodiment, the implantable vibration device is configured to abut the tissue of the stomach wall on the outside thereof. In one embodiment, the implantable vibration device is configured to abut the tissue of the intestine wall on the outside thereof. In one embodiment, the implantable vibration device is configured to vibrate at a frequency in the range of 1–150 Hz, such as inthe range of 35–150 Hz, such as in the range of 1–140 Hz, such as in the range of 1–130 Hz, such as in the range of 1–120 Hz, such as in therange of 1–110 Hz, such as in the range of 1–100 Hz, such as in the range of 1–90 Hz, such as in the range of 1–80 Hz, such as in the range of1–70 Hz, such as in the range of 1–60 Hz, such as in the range of 1–50 Hz, such as in the range of 1–40 Hz, such as in the range of 1–30 Hz, such as in the range of 1–20 Hz, such as in the range of 1–10 Hz. In one embodiment, the implantable vibration device is configured to vibrate at a frequency in the as in the range of 35–150 Hz,such as in the range of 35–140 Hz, such as in the range of 35–130 Hz, such as in the range of 35–120 Hz such as in the range of 35–110 Hzsuch as in the range of 35–100 Hz, such as in the range of 35–90 Hz, such as in the range of 35–80 Hz such as in the range of 35–70 Hzsuch as in the range of 35–60 Hz, such as in the range of 35–50 Hz. In one embodiment, the implantable vibration device is configured to vibrate at a the implantable vibration device is configured to vibrate with a period of 0.01–1 seconds, such as of 0.05–1 seconds. In one embodiment, the implantable vibration device is configured to vibrate at an amplitude such that the tissue in the stomach/intestine wall is displaced at least 1 mm. In one embodiment, the implantable vibration device comprises a vibration generating unit capable of causing the implantable vibration device to vibrate. In one embodiment, the vibration generating unit is comprises a motor having an offset shaft. In one embodiment, the vibration generating unit comprises at least one piezoelectric material configured to generate vibrations in the vibration device. In one embodiment, the piezoelectric material is a ceramic piezoelectric material. In one embodiment, the piezoelectric material is lead zirconate titanate, PZT. In one embodiment, the piezoelectric material is barium titanate. In one embodiment, the piezoelectric material is lead titanate. In one embodiment, the piezoelectric material is a polymeric piezoelectric material. In one embodiment, the polymeric piezoelectric material is polyvinylidene fluoride, PVDF. In one embodiment, wherein the piezoelectric material is comprised in a piezoelectric motor. In one embodiment, the piezoelectric motor is a piezoelectric inchworm motor. In one embodiment, the piezoelectric motor is a piezoelectric inertial motor. In one embodiment, the piezoelectric motor is a piezoelectric walk-drive motor. In one embodiment, the piezoelectric motor is a linear piezoelectric motor. In one embodiment, the vibration generating unit is attached to the casing, so that vibrations generated by the vibration generating unit can travel to the casing. In one embodiment, the piezoelectric motor is a rotational piezoelectric motor. In one embodiment, the vibration generating unit further comprises an weight configured to be eccentrically rotated by the rotational piezoelectric motor. In one embodiment, the system further comprising a further implantable vibration device 110’ configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient. In one embodiment, the system further comprising a casing adapted to contain the implantable vibration device. In one embodiment, the system further comprises an implantable wireless energy transmitter, wherein wireless energytransmitter is configured to wirelessly transfer energy to the implantable vibration device. In one embodiment the wireless energy transmitter is configured to be implanted in a different, remote position in the body of the patient than the implantable vibration device.In one embodiment the wireless energy receiver of the implantable vibration device includes a secondary coil, and wherein the wireless energy transmitter comprises a primary coil configured to induce a voltage in the secondary coil of the vibration device. In one embodiment the wireless energy receiver is configured to receive the energy via RFID pulses. In one embodiment, the system comprising a feedback unit configured to provide feedback pertaining to an amount of energyreceived by the wireless energy receiver via the RFID pulses, the system being configured to adjust an amount of energy based on the feedback. In one embodiment, the implantable vibration device comprises a rechargeable energy storage unit for temporarily storing at least part of the wirelessly received energy. In some embodiment, the implantable vibration device comprises an internal controller. In one embodiment the internal controller is configured to wirelessly receive vibration control data for controlling the vibration of the implantable vibration device. In one embodiment the internal controller is configured to receive the vibration control data wirelessly via the wireless energy receiver. In one embodiment internal controller includes an individual code by which it is individually addressable by an external controller or remote controller. In one embodiment comprising an external controller configured to communicate with the internal controller wirelessly. In one embodiment the external controller is an implantable external controller configured to be implanted within the patient’s body. In one embodiment, the external controller is a remote controller configured to communicate with the internal controller from outside the patient’s body. In one embodiment, the system further comprising a remote controller configured to communicate with the implantable external controller from outside the patient’s body. In one embodiment the remote controller is configured to communicate with the implantable external controller via electric wiring. In one embodiment, the remote controller is configured to communicate with the implantable external controller wirelessly. In one embodiment, wherein the remote controller is configured to be mounted to the patient’s skin. In one embodiment the system is configured such that at least one of:- wireless communication from or to, or both from and to, a controller of the system is encrypted,- data transmitted by a controller via wireless communication is signed, and- authentication of a user of the system involves input of authentication data of the patient. In one embodiment the encrypted wireless communication includes encryption with a public key and decryption with a private In one embodiment the private key is a combined key derived by combining at least a first key and a second key. In one embodiment signing of the data transmitted by the controller via wireless communication involves a private key and verification of the signed data involves a public key. In one embodiment the system further comprising a verification unit configured to obtain the authentication data of the patient. In one embodiment, the verification unit comprises at least one of a fingerprint reader, a retina scanner, a camera, a graphical user interface for inputting a code, and a microphone. In one embodiment, the system further comprising a sensation generator for generating a sensation detectable by a sense of the patient, wherein authentication of a communication channel between two controllers of the system involves input of authentication data of the patient relating to the sensation. In one embodiment the authentication of the communication channel involves a verification that the authentication data match data from the sensation generator relating to the sensation generated by the sensation generator. In one embodiment the sensation generator is configured to generate as the sensation detectable by the sense of the patient at least one of:- a vibration, which includes or does not include a fixed-frequency mechanical vibration,- a sound, which includes or does not include a superposition of fixed-frequency mechanical vibrations,- a photonic signal, which includes or does not include a non-visible light pulse, such as an infrared pulse,- a light signal, which includes or does not include a visual light pulse,- an electrical signal, which includes or does not include an electrical current pulse, and- a heat signal, which includes or does not include a thermal pulse. In one embodiment theimplantable vibration device comprises an outer surface and a coating arranged on the outer surface. In one embodiment the coating comprises at least one layer of a biomaterial. In one embodiment, the biomaterial comprises at least one drug or substance with one or more of the following characteristics: an antithrombotic, an antibacterial and an antiplatelet characteristic. In one embodiment wherein the biomaterial is fibrin-based. In one embodiment further comprising a second coating arranged on the first coating. In one embodiment ,the second coating is of a different biomaterial than said first coating. In one embodiment the first coating comprises a layer of perfluorocarbon chemically attached to the surface, and wherein the second coating comprises a liquid perfluorocarbon layer. In one embodiment the coating comprises a drug encapsulated in a porous material. In one embodiment the surface comprises a metal. In one embodiment the metal comprises at least one of the following, titanium, cobalt, nickel, copper, zinc, zirconium, molybdenum, tin or lead. In one embodiment the surface comprises a micro pattern. In one embodiment, the system further comprising a layer of a biomaterial coated on the micro pattern.ASPECT 473B– Stimulation_Vibration_Appetite_Invaginated In another aspect, there is provided system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. In one embodiment, the sensor device comprises a sensor electrode configured to measure an electric activity in the celiac vagus nerve in response to the vibrations. In one embodiment, the sensor device comprises a sensor electrode configured to measure a change in electrical impedance in the celiac vagus nerve in response to the. In one embodiment, wherein: the sensor electrode is configured to be arranged at the the celiac vagus nerve; the sensor device further comprises a reference electrode, and the sensor device is configured to generate the sensor signal based on an electrical interaction between the sensor electrode and the reference electrode. In one embodiment the reference electrode is formed by a casing of the vibration device In one embodiment wherein the sensor device is configured to measure hormone level in the blood of the patient. In one embodiment the hormone is ghrelin. In one embodiment the hormone is insulin. In one embodiment the control unit is configured to determine a response measure based on the sensor signal, the response measure being indicative of the celiac nerve response. In one embodiment the control unit is configured to: compare the response measure with a predetermined reference measure; and control the vibration device to: increase an intensity of the vibrations in response to the response measure being below the reference measure, and reduce the intensity of the vibrations in response to the response measure exceeding the reference measure. In one embodiment the control unit is configured to: increase the intensity of the stimulation signal by increasing at least one of a frequency, amplitude, period and duration of the vibrations; and reduce the intensity of the stimulation signal by reducing at least one of the frequency, amplitude, period and duration of vibrations.In one embodiment the predetermined reference measure is based on a previous measurement of the celiac nerve response in the patient. In one embodiment the predetermined reference measure is based on previous measurements of celiac nerve responses in other patient. In one embodiment control unit is configured to monitor the level of celiac nerve response over time, and to control the vibration device based on a change rate in the celiac nerve response over time. In one embodiment the control unit is configured to determine a calibration parameter of the vibration device based on the response measure. In one embodiment the vibrations are provided a frequency of 1–150 HzASPECT 473C– Stimulation_Vibration_Appetite_Invaginated In another aspect, there is provided a method for implanting a vibration device configured to reduce appetite in a human patient, the method comprises: invaginating, at least partially, a vibration device in the stomach of the patient. In one embodiment the method further comprises controlling the vibration device to vibrate, to thereby stimulate mechanoreceptors in the tissue of the stomach wall. In one embodiment, the controlling controls the vibration device to vibrate at a frequency in the range of 1–150 Hz such as in the range of 35–150 Hz. In one embodiment the controlling controls the vibration device to vibrate at an amplitude of at least 1 mm, such as in the range of 1–10 mm, preferably in the range of 1–5 mm. In one embodiment, the implantable vibration device is configured to vibrate with a period of 0.01–1 seconds, such as of 0.05–1 seconds In one embodiment, the step of controlling the vibration device to vibrate causes the vibration device to vibrate consecutively for a time of at least one minute. In one embodiment the vibration device is at least partially invaginated in the outside of the stomach of the patient. In one embodiment the vibration device is at least partially invaginated in the inside of the stomach of the patient. In one embodiment the vibration device is fully invaginated in the stomach of the patient, In one embodiment the vibration device is at least partially invaginated in the antrum of the stomach of the patient. In one embodiment the vibration device is at least partially invaginated in the fundus of the stomach of the patient. In one embodiment the vibration device is at least partially invaginated in the antrum of the stomach of the patient. In one embodiment the vibration device is at least partially invaginated in the cardia of the stomach of the patient. In one embodiment the method is a laparoscopic surgical method, and the method further comprises the step of introducing the vibration device into the body of the patient through a laparoscopic trocar. In one embodiment the method is a gastroscopic method, and the method further comprises the step of introducing the movement restriction device into the body of the patient through the esophagus of the patient. In one embodiment the method comprises the step of applying the surface friction reducing coating onto the vibration device prior to implantation in the body of the patient In one embodiment wherein the method comprises the step applying the surface friction reducing coating in situ between the implantable vibration device and tissue of the stomach wall of the patient.ASPECT 473D – Stimulation_Vibration_Appetite_Invaginated In another aspect, there is provided a method of reducing appetite in a human using a medical device system comprising pre- implanted vibration device at least partially invaginated in the wall of the stomach, the method comprising controlling the pre-implanted vibration device to vibrate to thereby activate at least one mechanoreceptor in the tissue of the stomach. In one embodiment, the vibration device is controlled to vibrate at a frequency in the range of 1–50 Hz, such as in the range of 35–150 Hz. In one embodiment, the vibration device is controlled to vibrate at a amplitude of at least 1 mm, such as in the range of 1–5 mm, more preferably in the range of 2–4 mm. In one embodiment the vibration device is controlled to vibrate consecutively for a period of at least one minute. In one embodiment the vibration device further comprises a wireless energy receiver, and wherein the method further comprises the steps of receiving, at the energy receiver, wireless energy for directly or indirectly operating the wireless energy device. In one embodiment the vibration device further comprises an internal controller, wherein the method further comprises wirelessly receiving, at the internal controller, vibration control data for controlling vibration of the vibration device. In one embodiment the vibration control data is wirelessly received via the wireless energy receiver. In one embodiment the step of sending a wireless control signal from a wireless remote control to the pre-implanted medical device system, wherein the vibration device is operated as a result of the receipt of the wireless control signal at the pre-implanted medical device system. In one embodiment the medical device system further comprises a pre-implanted controller configured to control the operation of the vibration device, and wherein the method comprises operating the vibration device as a result of at least one of: the receipt of a wireless control signal at the controller of the pre-implanted medical device, and the receipt of a sensor signal from a pre-implanted sensor at the controller, and the lapse of a pre-determined time. In one embodiment, the method is a cosmetic method. In one embodiment, the method is a non-therapeutic method.ASPECT 475A Stimulation_Vibration_General_Piezo In another aspect, there is provided an implantable vibration device comprising a vibration generating unit configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. In one embodiment, the implantable vibration device further comprising a wireless energy receiver configured to receivewireless energy to be used, directly or indirectly, by the vibration generating unit, wherein the casing further encloses the wireless energy receiver. In one embodiment further, the implantable vibration device further comprises a wireless energy receiver configured to receivewireless energy to be used, directly or indirectly, by the vibration generating unit, wherein the wireless energy receiver is provided outside the casing and coupled to the vibration generating unit through a lead. In one embodiment, the implantable vibration device further comprises a rechargeable energy storage unit provided within the casing. In one embodiment, the implantable vibration device further comprises the implantable vibration device comprises an internal controller. In one embodiment, the implantable vibration device further comprises the internal controller is configured to wirelessly receive vibration control data for controlling the vibration of the implantable vibration device. In one embodiment the implantable vibration device further comprises wherein the internal controller is configured to receive the vibration control data wirelessly via the wireless energy receiver. In one embodiment, the implantable vibration device further comprises wherein the casing further encloses the internal controller. In one embodiment, the implantable vibration device further comprises the piezoelectric material is a ceramic piezoelectric material. In one embodiment further, the implantable vibration device further comprises the piezoelectric material is lead zirconate titanate, PZT. In one embodiment, the implantable vibration device further comprises wherein the piezoelectric material is barium titanate. In one embodiment the implantable vibration device further comprises the piezoelectric material is lead titanate. In one embodiment, the implantable vibration device further comprises the piezoelectric material is a polymeric piezoelectric material. In one embodiment, the implantable vibration device further comprises the polymeric piezoelectric material is polyvinylidene fluoride, PVDF. In one embodiment, the implantable vibration device further comprises wherein the piezoelectric material is comprised in a piezoelectric motor. In one embodiment, the implantable vibration device further comprises wherein the piezoelectric motor is a piezoelectric inchworm motor.In one embodiment, the implantable vibration device further comprises wherein the piezoelectric motor is a piezoelectric inertial motor. In one embodiment, the implantable vibration device further comprises the piezoelectric motor is a piezoelectric walk-drive motor. In one embodiment, the implantable vibration device further comprises the piezoelectric motor is a linear piezoelectric motor. In one embodiment, the vibration generating unit is attached to the casing, so that vibrations generated by the vibration generating unit can travel to the casing. In one embodiment, the piezoelectric motor is a rotational piezoelectric motor. In one embodiment, the vibration generating unit further comprises an weight configured to be eccentrically rotated by the rotational piezoelectric motor. In one embodiment, the vibration generating unit is configured to cause the implantable vibration device to vibrate at a frequency in the range of 1–150 Hz, such as in the range of 35–150 Hz. In one embodiment, the vibration generating unit is configured to cause the implantable vibration device to vibrate at an amplitude of at least 1 mm. In one embodiment, the implantable vibration device comprises an outer surface and a coating arranged on the outer surface. In one embodiment, the coating comprises at least one layer of a biomaterial. In one embodiment, the biomaterial comprises at least one drug or substance with one or more of the following characteristics: an antithrombotic, an antibacterial and an antiplatelet characteristic. In one embodiment, the biomaterial is fibrin-based. In one embodiment, the implantable vibration device further comprising a second coating arranged on the first coating. In one embodiment, the second coating is of a different biomaterial than said first coating. In one embodiment, the first coating comprises a layer of perfluorocarbon chemically attached to the surface, and wherein the second coating comprises a liquid perfluorocarbon layer. In one embodiment, the coating comprises a drug encapsulated in a porous material. In one embodiment, the surface comprises a metal. In one embodiment, the metal comprises at least one of the following, titanium, cobalt, nickel, copper, zinc, zirconium, molybdenum, tin or lead. In one embodiment, the surface comprises a micro pattern. In one embodiment, comprising a layer of a biomaterial coated on the micro pattern. In one embodiment, the vibration generating unit is substantially non-magnetic. In one embodiment, the vibration generating unit is substantially non-metallic. In one embodiment, the piezoelectric motor is a reversable piezoelectric motor.ASPECT 474 A- Stimulation_Vibration_Sexual dysfunction_System In another aspect, there is provided a system for treating sexually dysfunctional female patient, comprising an implantable vibration device configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. In some embodiments, said implantable vibration device comprises a wireless energy receiver configured to receive wireless energy. In some embodiments, the area of the sexually responsive tissue is the clitoris. In one embodiment, the area of the sexually responsive tissue is the labia major. In one embodiment, the area of the sexually responsive tissue is labia minor. In some embodiment, the area of the sexually responsive tissue is the vestibule. In some embodiment, the implantable vibration device is configured to vibrate at a frequency in the range of 1–1000 Hz, such as in the range of 1 to 150 Hz. In some embodiment, the implantable vibration device is configured to vibrate at a the implantable vibration device is configured to vibrate with a period of 0.01–1 seconds, such as of 0.05–1 seconds. In some embodiment the implantable vibration device is configured to vibrate at an amplitude such that the tissue in the sexually responsive tissue is displaced at least 0.1 mm. In some embodiment, the implantable vibration device comprises a vibration generating unit capable of causing the implantable vibration device to vibrate. In some embodiment, the vibration generating unit is comprises a motor having an offset shaft. In some embodiment, wherein the vibration generating unit comprises at least one piezoelectric material configured to generate vibrations in the vibration device. In some embodiments, the piezoelectric material is a ceramic piezoelectric material. In some embodiments, the piezoelectric material is lead zirconate titanate, PZT. In some embodiments, the piezoelectric material is barium titanate. In some embodiments, the piezoelectric material is lead titanate. In some embodiments, the piezoelectric material is a polymeric piezoelectric material. In some embodiments, the polymeric piezoelectric material is polyvinylidene fluoride, PVDF. In some embodiments, the piezoelectric material is comprised in a piezoelectric motor. In some embodiments, the piezoelectric motor is a piezoelectric inchworm motor. In some embodiments, the piezoelectric motor is a piezoelectric inertial motor. In some embodiments, the piezoelectric motor is a piezoelectric walk-drive motor. In some embodiments, the piezoelectric motor is a linear piezoelectric motor. In some embodiments, the vibration generating unit is attached to the casing, so that vibrations generated by the vibration generating unit can travel to the casing. In some embodiments, the piezoelectric motor is a rotational piezoelectric motor. In some embodiments, the vibration generating unit further comprises an weight configured to be eccentrically rotated by the rotational piezoelectric motor. In some embodiments, the system further comprises a further implantable vibration device configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient. In some embodiments, the system further comprising a casing adapted to contain the implantable vibration device. In some embodiments, the system further comprises an implantable wireless energy transmitter, wherein wireless energy transmitter is configured to wirelessly transfer energy to the implantable vibration device. In some embodiments the wireless energy transmitter is configured to be implanted in a different, remote position in the body of the patient than the implantable vibration device. In some embodiments, the wireless energy receiver of the implantable vibration device includes a secondary coil, and wherein the wireless energy transmitter comprises a primary coil configured to induce a voltage in the secondary coil of the vibration device. In some embodiments the wireless energy receiver is configured to receive the energy via RFID pulses. In some embodiments, the system further comprising a feedback unit configured to provide feedback pertaining to an amount of energy received by the wireless energy receiver via the RFID pulses, the system being configured to adjust an amount of energy based on the feedback. In some embodiments the implantable vibration device comprises a rechargeable energy storage unit for temporarily storing at least part of the wirelessly received energy. In some embodiments, the implantable vibration device comprises an internal controller. In some embodiments wherein the internal controller is configured to wirelessly receive vibration control data for controlling the vibration of the implantable vibration device. In some embodiments the internal controller is configured to receive the vibration control data wirelessly via the wireless energy receiver. In some embodiments the internal controller includes an individual code by which it is individually addressable by an external controller or remote controller. In some embodiments, the system further comprising an external controller configured to communicate with the internal controller wirelessly. In some embodiments, the external controller is an implantable external controller configured to be implanted within the patient’s body. In some embodiments the external controller is a remote controller configured to communicate with the internal controller from outside the patient’s body. In some embodiments the system comprising a remote controller configured to communicate with the implantable external controller from outside the patient’s body. In some embodiments the remote controller is configured to communicate with the implantable external controller via electric wiring. In some embodiments, the remote controller is configured to communicate with the implantable external controller wirelessly. In some embodiments the remote controller is configured to be mounted to the patient’s skin. In some embodiment, the system is configured such that at least one of:- wireless communication from or to, or both from and to, a controller of the system is encrypted,- data transmitted by a controller via wireless communication is signed, and- authentication of a user of the system involves input of authentication data of the patient. In some embodiments the encrypted wireless communication includes encryption with a public key and decryption with a private key. In some embodiments the private key is a combined key derived by combining at least a first key and a second key. In some embodiments signing of the data transmitted by the controller via wireless communication involves a private key andverification of the signed data involves a public key. In some embodiments, the system further comprising a verification unit configured to obtain the authentication data of the patient. In some embodiments the verification unit comprises at least one of a fingerprint reader, a retina scanner, a camera, a graphical user interface for inputting a code, and a microphone. In some embodiment, the system further comprising a sensation generator for generating a sensation detectable by a sense of the patient, wherein authentication of a communication channel between two controllers of the system involves input of authentication data of the patient relating to the sensation. In some embodiments, the authentication of the communication channel involves a verification that the authentication data match data from the sensation generator relating to the sensation generated by the sensation generator. In some embodiments, the sensation generator is configured to generate as the sensation detectable by the sense of the patient at least one of:- a vibration, which includes or does not include a fixed-frequency mechanical vibration,- a sound, which includes or does not include a superposition of fixed-frequency mechanical vibrations,- a photonic signal, which includes or does not include a non-visible light pulse, such as an infrared pulse,- a light signal, which includes or does not include a visual light pulse,- an electrical signal, which includes or does not include an electrical current pulse, and- a heat signal, which includes or does not include a thermal pulse. In some embodiments the implantable vibration device comprises an outer surface and a coating arranged on the outer surface. In some embodiments the coating comprises at least one layer of a biomaterial. In some embodiments the biomaterial comprises at least one drug or substance with one or more of the following characteristics: an antithrombotic, an antibacterial and an antiplatelet characteristic. In some embodiments the biomaterial is fibrin-based. In some embodiments a second coating arranged on the first coating. In some embodiments the second coating is of a different biomaterial than said first coating. In some embodiments the first coating comprises a layer of perfluorocarbon chemically attached to the surface, and wherein the second coating comprises a liquid perfluorocarbon layer. In some embodiments the coating comprises a drug encapsulated in a porous material. In some embodiments the surface comprises a metal. In some embodiments the metal comprises at least one of the following, titanium, cobalt, nickel, copper, zinc, zirconium, molybdenum, tin or lead. In some embodiments the surface comprises a micro pattern. In some embodiments comprising a layer of a biomaterial coated on the micro pattern.ASPECT 474 B- Stimulation_Vibration_Sexual dysfunction_SystemIn another aspect, there is a method for implanting a vibration device for delivering vibrations to the sexually responsive tissue in a female, wherein the vibration device is configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina, wherein said implantable vibration device comprises a wireless energy receiver configured to receive wireless energy, the method comprising the steps of creating an opening in the skin or vaginal wall of the female patient; dissecting an area of the sexually responsive tissue, and placing the vibration device within said area. In some embodiments, the step of creating an opening in the skin or vaginal wall of the female patient comprises inserting a tube or needle into the patients body, filling the tube or needle with a gas and thereby expanding a cavity within the female patients body, inserting at least two laparoscopic trocars into said cavity, inserting at least one camera trough at least one laparoscopic trocar, inserting at least one dissecting tool through at least one laparoscopic trocar. In some embodiments the area of the sexually responsive tissue is the vulva.4. The method according to aspect 1 or 2 wherein the area of the sexually responsive tissue is the vagina. In some embodiments, the area of the sexually responsive tissue is the clitoris. In some embodiments, the area of the sexually responsive tissue is the labia major. In some embodiments the area of the sexually responsive tissue is labia minor. In some embodiments the area of the sexually responsive tissue the vestibule.ASPECT 474 C- Stimulation_Vibration_Sexual dysfunction_System In another aspect, there is provided method for delivering vibrations to the sexually responsive tissue of a female using a pre- implanted medical device system comprising a vibration device pre-implanted in the sexually responsive tissue of the vulva or the wall of the vagina, wherein the vibration device comprises a wireless energy receiver, wherein the method comprises the steps of controlling the vibration device to vibrate to thereby stimulate the sexually responsive tissue of the vulva or wall of the vagina; and receiving, at the energy receiver, wireless energy for directly or indirectly operating the vibration device. In some embodiments the vibration device and the wireless energy receiver R are provided in a common, pre-implanted, casing. In some embodiments the vibration device is controlled to vibrate at an frequency in the range of 0.1 to 1 kHz. In some embodiments the vibration device is controlled to vibrate at an frequency in the range of 0.1 to 100 Hz. In some embodiments the vibration device is controlled to vibrate at an amplitude of at least 0.1 mm, or of at least 1 mm, or in the range of 0.1 to 10 mm, or in the range of 1 to 5 mm. In some embodiments, the method further comprising a step of step of sending a wireless control signal the pre-implanted vibration device, wherein the vibration device is configured to vibrate as a result of the wireless control signal. In some embodiments the pre-implanted medical device system further comprises a controller configured to control the operation of the vibration device, and wherein the method comprises operating the first member as a result of at least one of: the receipt of a wireless control signal at the controller of the pre-implanted medical device, and the receipt of a sensor signal from a pre-implanted sensor at the controller, and the lapse of a pre-determined time. In some embodiments, the pre-implanted medical device is pre-implanted in an area of the sexually responsive tissue in the vulva. In some embodiments the pre-implanted medical device is pre-implanted in an area of the sexually responsive tissue in the vagina. In some embodiments the pre-implanted medical device is pre-implanted in an area of the sexually responsive tissue in the clitoris. In some embodiments the pre-implanted medical device is pre-implanted in an area of the sexually responsive tissue in the labia major. In some embodiments the pre-implanted medical device is pre-implanted in an area of the sexually responsive tissue in the labia minor. In some embodiments the pre-implanted medical device is pre-implanted in an area of the sexually responsive tissue in the vestibule. An external device configured for communication with the implantable medical device according to any of the embodiments herein, when implanted in a patient, is further provided. The external device comprises at least one first wireless transceiver configured for communication with the implantable medical device using a first network protocol, for determining a distance between the external device and the implantable medical device, and at least one second wireless transceiver configured for communication with the implantable medical device using a second network protocol, for transferring data between the external device and the implantable medical device. According to one embodiment, the first wireless transceiver comprises an UWB transceiver. According to one embodiment, the first wireless transceiver is configured for transcutaneous energy transfer for at least one of: powering an energy consuming component of the implantable medical device, and charging an implantable energy storage unit. According to one embodiment, the second network protocol is a standard network protocol. According to one embodiment, the second wireless transceiver comprises a Bluetooth transceiver. According to one embodiment, the external device is further configured to communicate with a second external device using the at least one wireless transceiver. According to one embodiment, the external device is configured for determining a distance between the external device and the implantable medical device by determining the RSSI. According to one embodiment, the standard network protocol is one of, or a combination of: Radio Frequency type protocol, RFIDtype protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, a communication range of the first network protocol is less than a communication range of the second network protocol. According to one embodiment, a frequency band of the first network protocol differs from a frequency band of the second network protocol. According to one embodiment, the external device is configured to authenticate the implantable medical device if the determined distance between the external device and the implantable medical device is less than a predetermined threshold value. The external device may be configured to allow the transfer of data between the external device and the implantable medical device after the implantable medical device has been authenticated. According to one embodiment, the external device is a wearable external device. According to one embodiment, the external device is a handset. An implantable medical device configured for communication with an external device according to one of the embodiments herein is further provided. The implantable medical device comprising at least one first wireless transceiver configured for communication with the external device using a first network protocol, for determining a distance between the external device and the implantable medical device, and at least one second wireless transceiver configured for communication with the external device using a second network protocol, for transferring data between the external device and the implantable medical device. According to one embodiment, the first wireless transceiver comprises an UWB transceiver. According to one embodiment, the first wireless transceiver is configured for transcutaneous energy transfer for at least one of: powering an energy consuming component of the implantable medical device, and charging an implantable energy storage unit. According to one embodiment, the second network protocol is a standard network protocol. According to one embodiment, the second wireless transceiver comprises a Bluetooth transceiver. According to one embodiment, the implantable medical device is further configured to communicate with a second external device using said at least one wireless transceiver. According to one embodiment, the implantable medical device is configured for determining a distance between the external device and the implantable medical device by determining the RSSI. According to one embodiment, the standard network protocol is one of, or a combination of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. The communication range of the first network protocol may be less than the communication range of the second network protocol. The frequency band of the first network protocol may differ from a frequency band of the second network protocol. According to one embodiment, the implantable medical device is configured to authenticate the external device if the determined distance between the external device and the implantable medical device is less than a predetermined threshold value. According to one embodiment, the implantable medical device may be configured to allow the transfer of data between the implantable medical device and the external device after the external device has been authenticated. An external device configured for communication with an implantable medical device according to any one of the embodiments disclosed herein is further provided. The external device comprising a wireless communication unit configured for wireless transmission of control commands to the implantable medical device and configured for wireless communication with a display device, and a computing unit configured for running a control software for creating the control commands for the operation of the implantable medical device. The computing unit may be configured to transmit a control interface to a display device configured to display the control interface to a user, receive user input from the display device, and transform the user input into the control commands for wireless transmission to the implantable medical device. In one embodiment, the wireless communication unit comprises a wireless transceiver for wireless transmission of control commands to the implantable medical device, and wireless transmission of the control interface to the display device. According to one embodiment, the wireless communication unit comprises a first wireless transceiver for wireless transmission of control commands to the implantable medical device, and a second wireless transceiver for wireless transmission of the control interface to the display device. The wireless communication unit may in one embodiment be configured for wireless communication with the display device using a standard network protocol. In one embodiment, the wireless communication unit is configured for wireless communication with the implantable medical device using a proprietary network protocol. The wireless communication unit may comprise a Bluetooth transceiver, which may be comprised in one of the first and second wireless transceiver. According to one embodiment, the wireless communication unit comprises a UWB transceiver, which may be comprised in one of the first and second wireless transceiver. The wireless communication unit may comprise at least one first wireless transceiver configured for communication with the implantable medical device using a first network protocol, for determining a distance between the external device and the implantable medical device, and at least one second wireless transceiver configured for communication with the implantable medical device using a second network protocol, for transferring data between the external device and the implantable medical device. According to one embodiment, the first wireless transceiver is configured for transcutaneous energy transfer for at least one of: powering an energy consuming component of the implantable medical device, and charging an implantable energy storage unit. According to one embodiment, the standard network protocol is one of, or a combination of: Radio Frequency type protocol, RFIDtype protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. The communication range of the first wireless transceiver may be less than a communication range of the second wireless transceiver The frequency band of the first network protocol may differ from a frequency band of the second network protocol. According to one embodiment, the external device is configured to authenticate the implantable medical device if a distance between the external device and the implantable medical device is less than a predetermined threshold value. According to one embodiment, the external device is configured to be authenticated by the implantable medical device if a distance between the external device and the implantable medical device is less than a predetermined threshold value. According to one embodiment, the external device is configured to authenticate the display device if a distance between the external device and the display device is less than a predetermined threshold value. According to one embodiment, the external device is configured to be authenticated by the implantable medical device if a distance between the external device and the display device is less than a predetermined threshold value. The external device may be configured to allow the transfer of data between the external device and the implantable medical device, and/or the external device and the display device, on the basis of the authentication. According to one embodiment, the computing unit is configured to encrypt at least one of the control interface and the control commands. A display device for communication with an external device for communication with an implantable medical device is furtherprovided. The display device comprises a wireless communication unit configured for wirelessly receiving an implant control interface fromthe external device and configured for wirelessly transmitting implant control user input to the external device. The display device furthercomprising a display for displaying the received implant control interface, and an input device for receiving implant control input from the user. According to one embodiment, the display device further comprises an auxiliary wireless communication unit configured to be disabled to enable at least one of: wirelessly receiving the implant control interface from the external device, and wirelessly transmitting implant control user input to the external device. According to one embodiment, the wireless communication unit is configured for wireless communication with the external device using a standard network protocol. According to one embodiment, the wireless communication unit is configured for wireless communication with the external device using a proprietary network protocol. According to one embodiment, the wireless communication unit comprises a Bluetooth transceiver. According to one embodiment, the wireless communication unit comprises a UWB transceiver. According to one embodiment, the standard network protocol is one of, or a combination of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. The communication range of the wireless communication unit of the display device may be less than a communication range ofthe auxiliary wireless communication unit. According to one embodiment, the display device is configured to authenticate the external device if a distance between the display device and the external device is less than a predetermined threshold value. According to one embodiment, the display device is configured to be authenticated by the external device if a distance between the display device and the external device is less than a predetermined threshold value. According to one embodiment, the display device is configured to allow the transfer of data between the display device and the external device on the basis of the authentication. The display device may be a wearable external device or a handset. A communication system for enabling communication between a display device and an implantable medical device is further provided. The communication system comprising a display device, a server, and an external device. The display device comprises a wireless communication unit configured for wirelessly receiving an implant control interface from the server, the implant control interface beingprovided by the external device, the wireless communication unit further being configured for wirelessly transmitting implant control user input to the server, destined for the external device, a display for displaying the received implant control interface, and an input device for receiving implant control input from the user. The server of the communication system comprises: a wireless communication unit configured for wirelessly receiving an implant control interface from the external device and wirelessly transmitting the implant control interface to the display device, the wireless communication unit further being configured for wirelessly receiving implant control user inputfrom the display device and wirelessly transmitting the implant control user input to the external device. The external device of the communication system comprises a wireless communication unit configured for wireless transmission of control commands to the implantable medical device and configured for wireless communication with the server, and a computing unit configured for: running a control software for creating the control commands for the operation of the implantable medical device, transmit a control interface to the server, destined for the display device, receive implant control user input generated at the display device, from the server, and transform the user input into the control commands for wireless transmission to the implantable medical device. According to one embodiment, the computing unit of the communication system is configured to encrypt at least one of the control interface and the control commands. According to one embodiment, the display device is configured to encrypt the user input. According to one embodiment, the server is configured to encrypt at least one of the user input received from the display device and the control interface received from the external device. According to one embodiment, the computing unit is configured to encrypt the control interface and the display device is configured to decrypt the encrypted control interface. According to one embodiment, the server is configured to act as a router, transferring the encrypted control interface from the external device to the display device without decryption. A display device for communication with an external device for communication with an implantable medical device is further provided. The display device comprising a wireless communication unit, a display, and an input device for receiving implant control input from the user. The display device is configured to run a first application for wireless communication with a server, and to run a secondapplication for wireless communication with the external device for transmission of the implant control input to the external device for the communication with the implantable medical device, wherein the second application is configured to be accessed through the first application. The display device may comprise a first log-in function and a second log-in function, and wherein the first log-in function gives the user access to the first application and wherein the first and second log-in function in combination gives the user access to the second application. According to one embodiment, the first log-in is a PIN-based log-in. According to one embodiment, at least one of the first and second log-in is a log-in based on a biometric input or a hardware key. According to one embodiment, the display device further comprises an auxiliary wireless communication unit, and the auxiliary wireless communication unit is configured to be disabled to enable wireless communication with the external device. According to one embodiment, the display device is configured to wirelessly receive an implant control interface from the external device to be displayed on the display. According to one embodiment of the display device, the wireless communication unit is configured for wireless communication with the external device using a standard network protocol. According to one embodiment of the display device, the wireless communication unit is configured for wireless communication with the external device using a proprietary network protocol. According to one embodiment of the display device, the wireless communication unit is configured for wireless communication with the external device using a first network protocol and with the server using a second network protocol. According to one embodiment of the display device, the wireless communication unit is configured for wireless communication with the external device using a first frequency band and with the server using a second frequency band. According to one embodiment of the display device, the wireless communication unit comprises a Bluetooth transceiver. According to one embodiment of the display device, the wireless communication unit comprises a UWB transceiver. According to one embodiment, the standard network protocol is one of, or a combination of: Radio Frequency type protocol, RFIDtype protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, the communication range of the wireless communication unit is less than a communication range of the auxiliary wireless communication unit. According to one embodiment, the wireless communication unit comprises a first wireless transceiver for communication with the external device and a second wireless transceiver for communication with the server. The second wireless transceiver may be configured to be disabled to enable wireless communication using the first wireless transceiver. According to one embodiment, the display device is configured to authenticate the external device if a distance between the display device and the external device is less than a predetermined threshold value, and the display device is configured to be authenticated by the external device if a distance between the display device and the external device is less than a predetermined threshold value. According to one embodiment, the display device is configured to allow the transfer of data between the display device and the external device on the basis of the authentication. The display device may be a wearable external device or a handset. According to one embodiment of the display device, the second application may be configured to receive data related to a parameter of the implanted medical device. According to one embodiment, the second application is configured to receive data related to a sensor value received from the implanted medical device. According to one embodiment, the second application is configured to receive data related to a parameter related to at least one of: a battery status, a temperature, a time, or an error. According to one embodiment, the display device is configured to encrypt the user input. According to one embodiment, the display is configured to encrypt the user input for decryption by the implantable medical device. According to one embodiment, the display device is configured to decrypt the control interface received from the external device, for displaying the control interface on the display. According to one embodiment, at least one of the first and second application is configured to receive data from an auxiliary external device and present the received data to the user. At least one of the first and second application may be configured to receive data from an auxiliary external device comprising ascale for determining the weight of the user. According to one embodiment, at least one of the first and second application may be configured to receive data related to the weight of the user from an auxiliary external device comprising a scale. According to one embodiment, the display device is configured to: wirelessly transmit the data related to the weight of the user to the external device, or wirelessly transmit an instruction derived from the data related to the weight of the user, or wirelessly transmit an instruction derived from a combination of the data related to the weight of the user and the implant control input received from the user. A communication system for enabling communication between a display device and an implantable medical device is further provided. The communication system comprises a display device, a server, and an external device. The display device comprises: a wireless communication unit configured for wirelessly receiving an implant control interface from the external device, the wireless communication unit further being configured for wirelessly transmitting implant control user input to the external device. The display device furthercomprises a display for displaying the received implant control interface, and an input device for receiving implant control input from the user, wherein the display device is configured to run a first application for wireless communication with the server, and to run a second application for wireless communication with the external device for transmission of the implant control input to the external device for thecommunication with the implantable medical device. The external device comprises a wireless communication unit configured for wireless transmission of control commands based on the implant control input to the implantable medical device and configured for wireless communication with the display device. According to one embodiment, the display device comprises a first log-in function and a second log-in function, and wherein the first log-in function gives the user access to the first application and wherein the first and second log-in function in combination gives the user access to the second application. The second application may be configured to receive data related to a parameter of the implanted medical device, and the second application may be configured to receive data related to a sensor value received from the implanted medical device. According to one embodiment, the second application is configured to receive data related to a parameter related to at least one of: a battery status, a temperature, a time, or an error. According to one embodiment, the display device is configured to encrypt the user input. According to one embodiment, the display is configured to encrypt the user input for decryption by the implantable medical device. According to one embodiment, the external device is configured to act as a router, transferring the encrypted user input from the display device to the implantable medical device without decryption. According to one embodiment, the external device is configured to encrypt at least one of the control interface and the control commands. According to one embodiment, the external device is configured to encrypt the control interface and wherein the display device is configured to decrypt the encrypted control interface. A computer program product configured to run in a display device comprising a wireless communication unit, a display for displaying the received implant control interface, and an input device for receiving implant control input from a user is further provided. The computer program product comprising a first application for communication with a server, and a second application for communication with an external device for transmission of the implant control input to the external device for the communication with an implantable medical device, wherein the second application is configured to be accessed through the first application. The computer program product further comprises a first log-in function, and a second log-in function, wherein the first log-in function gives the user access to the first application and the first and second log-in function in combination gives the user access to the second application. According to one embodiment of the computer program product, the second application is configured to receive data related to a parameter of the implanted medical device. According to one embodiment of the computer program product, the second application is configured to receive data related to a sensor value received from the implanted medical device. According to one embodiment of the computer program product, the second application is configured to receive data related to a parameter related to at least one of: a battery status, a temperature, a time, or an error. A communication system for enabling communication between a display device, an external device, a server and an implantable medical device is further provided. The communication system comprising: a server, a display device, an external device, and an implantablemedical device. The display device comprises: a wireless communication unit for wirelessly communicating with at least one of the external device and the server, a display, and an input device for receiving input from the user. The external device comprises: a wireless communication unit configured for wireless transmission of control commands to the implantable medical device and configured for wireless communication with at least one of the display device and the server. The server comprises: a wireless communication unit configured for wireless communication with at least one of the display device and the external device. The implantable medical device comprises: a wireless communication unit configured for wireless communication with the external device. The implantable medical devicecomprises an encryption unit which is configured to encrypt data destined for the server, transmit the data to the server via the external device, wherein the external device acts as a router transferring the data without full decryption, or the implantable medical device comprises an encryption unit and is configured to: encrypt data destined for the display device, transmit the data to the display device via the external device, wherein the external device acts as a router transferring the data without full decryption, or the server comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the external device, wherein the external device acts as a router transferring the data without full decryption, or the server comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to theimplantable medical device via the display device and the external device, wherein the display device and the external device acts as arouter transferring the data without full decryption, or the display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the external device, wherein theexternal device acts as a router transferring the data without full decryption, or the display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the server and the external device, wherein the server and the external device acts as a router transferring the data without full decryption. According to one embodiment, the display device is configured to wirelessly receive an implant control interface from the external device to be displayed on the display. According to one embodiment of the communication system, at least two of: the wireless communication unit of the server, the wireless communication unit of the display device, the wireless communication unit of the external device, and the wireless communicationunit of the implantable medical device - is configured for wireless communication using a standard network protocol. According to one embodiment, the at least two of: the wireless communication unit of the server, the wireless communication unit of the display device, the wireless communication unit of the external device, and the wireless communication unit of the implantablemedical device - is configured for wireless communication using a proprietary network protocol. According to one embodiment, the wireless communication unit of the external device is configured to: use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the server, or use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the display device. According to one embodiment, the wireless communication unit of the external device is configured to: use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the server, or use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the display device. According to one embodiment, the wireless communication unit of the display device is configured to use a first network protocol for communication with the external device and use a second network protocol for communication with the server. According to one embodiment, the wireless communication unit of the display device is configured to use a first frequency band for communication with the external device and use a second frequency band for communication with the server. According to one embodiment, the wireless communication unit of the server is configured to use a first network protocol for communication with the external device and use a second network protocol for communication with the display device. According to one embodiment, the wireless communication unit of the server is configured to use a first frequency band for communication with the external device and use a second frequency band for communication with the display device. According to one embodiment, the wireless communication unit of at least one of the server, the display device, the external device, and the implantable medical device comprises a Bluetooth transceiver. According to one embodiment, the wireless communication unit of at least one of the server, the display device, the external device, and the implantable medical device comprises a UWB transceiver. According to one embodiment, the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and a GSM type protocol. According to one embodiment, the wireless communication unit of the external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the server, and wherein the second wireless transceiver has a longer effective range than the first wireless transceiver. According to one embodiment, the wireless communication unit of the external device comprises a first wireless transceiver forwireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the display device, and wherein the second wireless transceiver has a longer effective range than the first wireless transceiver. According to one embodiment, the wireless communication unit of the display device comprises a first wireless transceiver for wireless communication with the external device, and a second wireless transceiver for wireless communication with the server, and wherein the second wireless transceiver has a longer effective range than the first wireless transceiver. According to one embodiment, the second wireless transceiver has an effective range being one of: 2 times, 4 times, 8 times 20 times, 50 times or 100 times longer than the first wireless transceiver. According to one embodiment, the second wireless transceiver is configured to be disabled to enable wireless communication using the first wireless transceiver. According to one embodiment, of the communication system, at least one of: the display device is configured to authenticate the external device if a distance between the display device and the external device is less than a predetermined threshold value, the display device is configured to be authenticated by the external device if a distance between the display device and the external device is less than a predetermined threshold value, the display device is configured to authenticate the implantable medical device if a distance between the display device and the implantable medical device is less than a predetermined threshold value, the display device is configured to be authenticated by the implantable medical device if a distance between the display device and the implantable medical device is less than a predetermined threshold value, the external device is configured to authenticate the display device if a distance between the external device and the display device is less than a predetermined threshold value, the external device is configured to be authenticated by the display device if a distance between the external device and the display device is less than a predetermined threshold value, the external device is configured to authenticate the implantable medical device if a distance between the external device and theimplantable medical device is less than a predetermined threshold value, and the external device is configured to be authenticated by the implantable medical device if a distance between the external device and the implantable medical device is less than a predetermined threshold value. According to one embodiment of the communication system, the display device may be configured to allow the transfer of data between the display device and the external device on the basis of the authentication. According to one embodiment of the communication system, the external device is configured to allow the transfer of data between the display device and the external device on the basis of the authentication. According to one embodiment of the communication system, the external device is configured to allow the transfer of data between the external device and the implantable medical device on the basis of the authentication. According to one embodiment of the communication system, the display device is a wearable external device or a handset. According to one embodiment of the communication system, the data encrypted by the implantable medical device is related to at least one of: a battery status, a temperature, a time, or an error. A server for use in the communication system according to any one of the embodiments above is further provided. claims 1 – 24. A display device for use in the communication system according to any one of the embodiments above is further provided. An external device for use in the communication system according to any one of the embodiments above is further provided. An implantable medical device for use in the communication system according to any one of the embodiments above is further provided.An external device configured for communication with an implantable medical device, when implanted in a patient, is provided. The external device comprises at least one first wireless transceiver configured for communication with the implantable medical device using a first network protocol, for determining a distance between the external device and the implantable medical device, and at least one second wireless transceiver configured for communication with the implantable medical device using a second network protocol, for transferring data between the external device and the implantable medical device. According to one embodiment, the first wireless transceiver comprises an UWB transceiver. According to one embodiment, the first wireless transceiver is configured for transcutaneous energy transfer for at least one of powering an energy consuming component of the implantable medical device and charging an implantable energy storage unit. According to one embodiment, the second network protocol is a standard network protocol. The standard network protocol may be one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, the second wireless transceiver comprises a Bluetooth transceiver. According to one embodiment, the external device is further configured to communicate with a second external device using said at least one wireless transceiver. According to one embodiment, the external device is configured for determining a distance between the external device and the implantable medical device by determining the RSSI. According to one embodiment, a communication range of the first network protocol is less than a communication range of the second network protocol. According to one embodiment, a frequency band of the first network protocol differs from a frequency band of the second network protocol. According to one embodiment, the external device is configured to authenticate the implantable medical device if the determined distance between the external device and the implantable medical device is less than a predetermined threshold value. According to one embodiment, the external device is configured to allow the transfer of data between the external device and the implantable medical device after the implantable medical device has been authenticated. According to one embodiment, the external device is one from the list of: a wearable external device, and a handset. An implantable medical device configured for communication with an external device is provided. The implantable medical devicecomprises at least one first wireless transceiver configured for communication with the external device using a first network protocol, for determining a distance between the external device and the implantable medical device, and at least one second wireless transceiver configured for communication with the external device using a second network protocol, for transferring data between the external device and the implantable medical device. According to one embodiment, the first wireless transceiver comprises an UWB transceiver. According to one embodiment, the first wireless transceiver is configured for transcutaneous energy transfer for at least one of: powering an energy consuming component of the implantable medical device, and charging an implantable energy storage unit. According to one embodiment, the second network protocol is a standard network protocol, such as selected from the list of Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, the second wireless transceiver comprises a Bluetooth transceiver. According to one embodiment, the implantable medical device is further configured to communicate with a second external device using said at least one wireless transceiver. According to one embodiment, the implantable medical device is configured for determining a distance between the external device and the implantable medical device by determining the RSSI. According to one embodiment, a communication range of the first network protocol is less than a communication range of the second network protocol. According to one embodiment, a frequency band of the first network protocol differs from a frequency band of the second network protocol. According to one embodiment, the implantable medical device is configured to authenticate the external device if the determined distance between the external device and the implantable medical device is less than a predetermined threshold value. According to one embodiment, the implantable medical device is configured to allow the transfer of data between the implantable medical device and the external device after the external device has been authenticated. According to one embodiment, the implantable medical device comprises at least one of: an external heart compression device, an apparatus assisting the pump function of a heart of the patient, an apparatus assisting the pump function comprising a turbine bump placed within a patient’s blood vessel for assisting the pump function of the heart, an operable artificial heart valve, an operable artificial heart valve for increasing the blood flow to the coronary arteries, an implantable drug delivery device, an implantable drug delivery device for injecting directly into a blood vessel and change the position of the injection site, all from within the patient’s body, an implantable drug delivery device for injecting potency enhancing drugs into an erectile tissue of the patient, a hydraulic, mechanic, and/or electric constriction implant, an operable volume filling device, an operable gastric band, an operable implant for stretching the stomach wall of the patient for creating satiety, an implant configured to sense the frequency of the patient ingesting food, an operable cosmetic implant, an operable cosmetic implant for adjust the shape and/or size in the breast region of a patient, an implant controlling medical device for the emptying of a urinary bladder, an implant hindering urinary leakage, an implant hindering anal incontinence, an implant controlling the emptying of fecal matter, an implant monitoring an aneurysm, an implant for hindering the expansion of an aneurysm, an implant lubricating a joint, an implant for affecting the blood flow to an erectile tissue of the patient, an implant for simulating the engorgement of an erectile tissue, an implant with a reservoir for holding bodily fluids, an implant storing and/or emptying a bodily reservoir or a surgically created reservoir, an implant communicating with a database outside the body, an implant able to be programmed from outside the body, an implant able to be programmed from outside the body with a wireless signal, an implant treating impotence, an implant controlling the flow of eggs in the uterine tube, an implant controlling the flow of sperms in the uterine tube, an implant controlling the flow of sperms in the vas deferens, an implant for hindering the transportation of the sperm in the vas deferens, an implant treating osteoarthritis, an implant performing a test of parameters inside the body, an implant controlling specific treatment parameters from inside the body, an implant controlling bodily parameters from inside the body,an implant controlling the blood pressure, an implant controlling the blood pressure by affecting the dilatation of the renal artery, an implant controlling a drug treatment parameter, an implant controlling a parameter in the blood, an implant for adjusting or replacing any bone part of a body of the patient, an implant replacing an organ of the patient or part of an organ of the patient or the function thereof, a vascular treatment device, an implant adapted to move fluid inside the body of the patient, an implant configured to sense a parameter related to the patient swallowing, an implant configured to exercise a muscle with electrical or mechanical stimulation, an implant configured for emptying an intestine portion on command,an operable implant configured to be invaginated in the stomach of the patient to reduce the volume of the stomach substantially more than the volume of the device, an implant configured for emptying the urinary bladder from within the patient’s body by compressing the bladder, an implant configured for draining fluid from within the patient’s body, an implant configured for the active lubrication of a joint with an added lubrication fluid, an implant configured for removing clots and particles from the patient’s blood stream, an implant configured for elongating or straightening a bone in the patient, to reduce scoliosis, a device to stimulate the brain for a several position to a focused point, an artificial stomach replacing the function of the natural stomach, an implant configured for adjusting the position of a female’s urinary tract or bladder neck, an implant configured for stimulating the ampulla vas deference and creating temporary constriction. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new private key device, wherein a health care provider, HCP, or HCP admin have such master private key device adapted to able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP external interrogation device, EID, are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the dedicated data infrastructure, DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A patient external device configured for communication with an implantable medical device, when implanted in a patient, is provided. The patient external device comprises a wireless communication unit configured for wireless transmission of control commands to the implantable medical device and configured for wireless communication with a patient display device, and a computing unit configured for running a control software for creating the control commands for the operation of the implantable medical device. The computing unit is configured to transmit a control interface as a remote display portal to a patient display device configured to display the control interface to a user, receive user input from the patient display device, and transform the user input into the control commands for wireless transmission to the implantable medical device. According to one embodiment, the wireless communication unit comprises a wireless transceiver for wireless transmission of control commands to the implantable medical device, and wireless transmission of the control interface as the remote display portal to the patient display device. According to one embodiment, the wireless communication unit comprises a first wireless transceiver for wireless transmission of control commands to the implantable medical device, and a second wireless transceiver for wireless transmission of the control interface to the patient display device. According to one embodiment, the wireless communication unit is configured for wireless communication with the patient display device using a standard network protocol. According to one embodiment, the wireless communication unit is configured for wireless communication with the implantable medical device using a proprietary network protocol. According to one embodiment, the wireless communication unit comprises a Bluetooth transceiver. According to one embodiment, at least one of the first and second wireless transceiver comprises a Bluetooth transceiver. According to one embodiment, the wireless communication unit comprises a UWB transceiver. According to one embodiment, at least one of the first and second wireless transceiver comprises a UWB transceiver. According to one embodiment, the wireless communication unit comprises at least one first wireless transceiver configured for communication with the implantable medical device using a first network protocol, for determining a distance between the patient external device and the implantable medical device, and at least one second wireless transceiver configured for communication with the implantablemedical device using a second network protocol, for transferring data between the patient external device and the implantable medical device. According to one embodiment, the first wireless transceiver is configured for transcutaneous energy transfer for at least one of: powering an energy consuming component of the implantable medical device and charging an implantable energy storage unit. According to one embodiment, the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, a communication range of the first wireless transceiver is less than a communication range of the second wireless transceiver. According to one embodiment, at least one of: the patient external device is configured to authenticate the implantable medical device if a distance between the patient external device and the implantable medical device is less than a predetermined threshold value, the patient external device is configured to be authenticated by the implantable medical device if a distance between the patient external device and the implantable medical device is less than a predetermined threshold value, the patient external device is configured to authenticate the patient display device if a distance between the patient external device and the patient display device is less than a predetermined threshold value, and the patient external device is configured to be authenticated by the implantable medical device if a distance between the patient external device and the patient display device is less than a predetermined threshold value. According to one embodiment, the patient external device is configured to allow the transfer of data between at least one of: the patient external device and the implantable medical device, and the patient external device and the patient display device, on the basis of the authentication. According to one embodiment, the computing unit is configured to encrypt at least one of the control interface and the control commands. According to one embodiment, the implantable medical device comprises at least one of: an external heart compression device, an apparatus assisting the pump function of a heart of the patient, an apparatus assisting the pump function comprising a turbine bump placed within a patient’s blood vessel for assisting the pump function of the heart, an operable artificial heart valve, an operable artificial heart valve for increasing the blood flow to the coronary arteries. an implantable drug delivery device, an implantable drug delivery device for injecting directly into a blood vessel and change the position of the injection site, all from within the patient’s body, an implantable drug delivery device for injecting potency enhancing drugs into an erectile tissue of the patient, a hydraulic, mechanic, and/or electric constriction implant, an operable volume filling device, an operable gastric band, an operable implant for stretching the stomach wall of the patient for creating satiety, an implant configured to sense the frequency of the patient ingesting food, an operable cosmetic implant, an operable cosmetic implant for adjust the shape and/or size in the breast region of a patient, an implant controlling medical device for the emptying of a urinary bladder, an implant hindering urinary leakage, an implant hindering anal incontinence, an implant controlling the emptying of fecal matter, an implant monitoring an aneurysm, an implant for hindering the expansion of an aneurysm, an implant lubricating a joint, an implant for affecting the blood flow to an erectile tissue of the patient, an implant for simulating the engorgement of an erectile tissue, an implant with a reservoir for holding bodily fluids, an implant storing and/or emptying a bodily reservoir or a surgically created reservoir, an implant communicating with a database outside the body, an implant able to be programmed from outside the body, an implant able to be programmed from outside the body with a wireless signal, an implant treating impotence, an implant controlling the flow of eggs in the uterine tube, an implant controlling the flow of sperms in the uterine tube, an implant controlling the flow of sperms in the vas deferens, an implant for hindering the transportation of the sperm in the vas deferens, an implant treating osteoarthritis, an implant performing a test of parameters inside the body, an implant controlling specific treatment parameters from inside the body, an implant controlling bodily parameters from inside the body, an implant controlling the blood pressure, an implant controlling the blood pressure by affecting the dilatation of the renal artery, an implant controlling a drug treatment parameter, an implant controlling a parameter in the blood, an implant for adjusting or replacing any bone part of a body of the patient, an implant replacing an organ of the patient or part of an organ of the patient or the function thereof, a vascular treatment device, an implant adapted to move fluid inside the body of the patient, an implant configured to sense a parameter related to the patient swallowing, an implant configured to exercise a muscle with electrical or mechanical stimulation, an implant configured for emptying an intestine portion on command, an operable implant configured to be invaginated in the stomach of the patient to reduce the volume of the stomach substantially more than the volume of the device, an implant configured for emptying the urinary bladder from within the patient’s body by compressing the bladder, an implant configured for draining fluid from within the patient’s body, an implant configured for the active lubrication of a joint with an added lubrication fluid, an implant configured for removing clots and particles from the patient’s blood stream, an implant configured for elongating or straightening a bone in the patient, to reduce scoliosis, a device to stimulate the brain for a several position to a focused point, an artificial stomach replacing the function of the natural stomach, an implant configured for adjusting the position of a female’s urinary tract or bladder neck, an implant configured for stimulating the ampulla vas deference and creating temporary constriction. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new private key device, wherein the HCP or HCP admin have such master private key device adapted to able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A patient display device for communication with a patient remote external device for communication with an implantable medical device is provided. The patient display device comprises a wireless communication unit configured for wirelessly receiving an implant control interface as a remote display portal from the patient remote external device and configured for wirelessly transmitting implantcontrol user input to the patient remote external device, a display for displaying the received implant control interface, and an input device for receiving implant control input from the user. According to one embodiment, the patient display device further comprises an auxiliary wireless communication unit. The auxiliary wireless communication unit is configured to be disabled to enable at least one of: wirelessly receiving the implant control interface as the remote display portal from the patient remote external device, and wirelessly transmitting implant control user input to thepatient remote external device. According to one embodiment, the wireless communication unit is configured for wireless communication with the patient remote external device using a standard network protocol. The standard network protocol may be one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, the wireless communication unit is configured for wireless communication with the patient remote external device using a proprietary network protocol. According to one embodiment, the wireless communication unit comprises a Bluetooth transceiver. According to one embodiment, the wireless communication unit comprises a UWB transceiver. According to one embodiment, a communication range of the wireless communication unit is less than a communication range of the auxiliary wireless communication unit. According to one embodiment, the patient display device is configured to authenticate the patient remote external device if a distance between the patient display device and the patient remote external device is less than a predetermined threshold value, or to beauthenticated by the patient remote external device if a distance between the patient display device and the patient remote external device is less than a predetermined threshold value. According to one embodiment, the patient display device is configured to allow the transfer of data between the patient display device and the patient remote external device on the basis of the authentication. According to one embodiment, the patient display device is a wearable external device or a handset. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new private key device, wherein the HCP or HCP admin have such master private key device adapted to able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A communication system for enabling communication between a patient display device and an implantable medical device, whenimplanted, is provided. The communication system comprises: a patient display device, a server, and a patient remote external device. The patient display device comprises a wireless communication unit configured for wirelessly receiving an implant control interface as a remote display portal being provided by the patient remote external device. The wireless communication unit is further configured for wirelessly transmitting implant control user input to the server, destined for the patient remote external device. The system further comprises a display for displaying the received remote display portal, and an input device for receiving implant control input from the user, wherein the patient remote external device comprises a wireless communication unit configured for wireless transmission of control commands to theimplantable medical device, and a computing unit. The computing unit is configured for running a control software for creating the controlcommands for the operation of the implantable medical device, transmitting a control interface to the patient display device, receiving implant control user input generated at the patient display device, from the server, and transforming the user input into the control commands for wireless transmission to the implantable medical device. According to one embodiment, the computing unit is configured to encrypt at least one of the control interface and the control commands. According to one embodiment, the patient display device is configured to encrypt the user input. According to one embodiment, the server is configured to encrypt at least one of the user input received from the patient display device and the control interface received from the patient remote external device. According to one embodiment, the computing unit is configured to encrypt the control interface and the patient display device is configured to decrypt the encrypted control interface. According to one embodiment, the server is configured to act as a router, transferring the encrypted control interface from the patient remote external device to the patient display device without decryption. According to one embodiment of the communication system or patient display device the implantable medical device comprises at least one of: an external heart compression device, an apparatus assisting the pump function of a heart of the patient, an apparatus assisting the pump function comprising a turbine bump placed within a patient’s blood vessel for assisting the pump function of the heart, an operable artificial heart valve, an operable artificial heart valve for increasing the blood flow to the coronary arteries. an implantable drug delivery device,an implantable drug delivery device for injecting directly into a blood vessel and change the position of the injection site, all from within the patient’s body, an implantable drug delivery device for injecting potency enhancing drugs into an erectile tissue of the patient, a hydraulic, mechanic, and/or electric constriction implant, an operable volume filling device, an operable gastric band, an operable implant for stretching the stomach wall of the patient for creating satiety, an implant configured to sense the frequency of the patient ingesting food, an operable cosmetic implant, an operable cosmetic implant for adjust the shape and/or size in the breast region of a patient, an implant controlling medical device for the emptying of a urinary bladder, an implant hindering urinary leakage, an implant hindering anal incontinence, an implant controlling the emptying of fecal matter, an implant monitoring an aneurysm, an implant for hindering the expansion of an aneurysm, an implant lubricating a joint, an implant for affecting the blood flow to an erectile tissue of the patient, an implant for simulating the engorgement of an erectile tissue, an implant with a reservoir for holding bodily fluids, an implant storing and/or emptying a bodily reservoir or a surgically created reservoir, an implant communicating with a database outside the body, an implant able to be programmed from outside the body, an implant able to be programmed from outside the body with a wireless signal, an implant treating impotence, an implant controlling the flow of eggs in the uterine tube, an implant controlling the flow of sperms in the uterine tube, an implant controlling the flow of sperms in the vas deferens, an implant for hindering the transportation of the sperm in the vas deferens, an implant treating osteoarthritis, an implant performing a test of parameters inside the body, an implant controlling specific treatment parameters from inside the body, an implant controlling bodily parameters from inside the body, an implant controlling the blood pressure, an implant controlling the blood pressure by affecting the dilatation of the renal artery, an implant controlling a drug treatment parameter, an implant controlling a parameter in the blood, an implant for adjusting or replacing any bone part of a body of the patient, an implant replacing an organ of the patient or part of an organ of the patient or the function thereof, a vascular treatment device, an implant adapted to move fluid inside the body of the patient, an implant configured to sense a parameter related to the patient swallowing, an implant configured to exercise a muscle with electrical or mechanical stimulation, an implant configured for emptying an intestine portion on command, an operable implant configured to be invaginated in the stomach of the patient to reduce the volume of the stomach substantially more than the volume of the device, an implant configured for emptying the urinary bladder from within the patient’s body by compressing the bladder, an implant configured for draining fluid from within the patient’s body, an implant configured for the active lubrication of a joint with an added lubrication fluid, an implant configured for removing clots and particles from the patient’s blood stream, an implant configured for elongating or straightening a bone in the patient, to reduce scoliosis, a device to stimulate the brain for a several position to a focused point, an artificial stomach replacing the function of the natural stomach, an implant configured for adjusting the position of a female’s urinary tract or bladder neck, an implant configured for stimulating the ampulla vas deference and creating temporary constriction. According to one embodiment, the communication system further comprises a server. The server may comprise a wireless communication unit configured for wirelessly receiving an implant control interface received from the patient remote external device and wirelessly transmitting the implant control interface as a remote display portal to the patient display device. The wireless communicationunit is further configured for wirelessly receiving implant control user input from a patient EID external device and wirelessly transmitting the implant control user input to the patient display device. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new private key device, wherein the HCP or HCP admin have such master private key device adapted to able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A patient display device for communication with a patient external device for communication with an implantable medical device, when implanted, is provided. The patient display device comprises a wireless communication unit, a display, and an input device for receiving implant control input from the user. The patient display device is configured to run a first application for wireless communication with a server and/or DDI, and run a second application for wireless communication with the patient external device for transmission of the implant control input to a remote display portal of the patient external device for the communication with the implantable medical device, wherein the second application is configured to be accessed through the first application. The patient display device comprises a first log-in function and a second log-in function, wherein the first log-in function gives the user access to the first application and wherein the firstand second log-in function in combination gives the user access to the second application. The first log-in function may be configured to use at least one of a password, pin code, fingerprint, voice and face recognition. A second log-in function within the first application may beconfigured to use a private key from the user to authenticate, for a defined time period, a second hardware key of the patient external device. According to one embodiment, the first log-in is a PIN-based log-in. According to one embodiment, at least one of the first and second log-in is a log-in based on a biometric input or a hardware key. According to one embodiment, the patient display device further comprises an auxiliary wireless communication unit, and wherein the auxiliary wireless communication unit is configured to be disabled to enable wireless communication with the patient external device. According to one embodiment, the patient display device is configured to wirelessly receive an implant control interface as a remote display portal from the patient external device to be displayed on the display. According to one embodiment, the wireless communication unit is configured for wireless communication with the patient external device using a standard network protocol. According to one embodiment, the wireless communication unit is configured for wireless communication with the patient external device using a proprietary network protocol. According to one embodiment, the wireless communication unit is configured for wireless communication with the patient external device using a first network protocol and with the server using a second network protocol. According to one embodiment, the wireless communication unit is configured for wireless communication with the patient external device using a first frequency band and with the server using a second frequency band. According to one embodiment, the wireless communication unit comprises a Bluetooth transceiver. According to one embodiment, the wireless communication unit comprises a UWB transceiver. According to one embodiment, the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, a communication range of the wireless communication unit is less than a communication range of the auxiliary wireless communication unit. According to one embodiment, the wireless communication unit comprises a first wireless transceiver for communication with the patient external device and a second wireless transceiver for communication with the server. According to one embodiment, the second wireless transceiver is configured to be disabled to enable wireless communication using the first wireless transceiver. According to one embodiment, the patient display device is configured to authenticate the patient external device if a distance between the patient display device and the patient external device is less than a predetermined threshold value, or to be authenticated by the patient external device if a distance between the patient display device and the patient external device is less than a predetermined threshold value. According to one embodiment, the patient display device is configured to allow the transfer of data between the patient display device and the patient external device on the basis of the authentication. According to one embodiment, the patient display device is a wearable external device or a handset. According to one embodiment, the second application is configured to receive data related to a parameter of the implanted medical device. According to one embodiment, the second application is configured to receive data related to a sensor value received from the implanted medical device. According to one embodiment, the second application is configured to receive data related to a parameter related to at least one of: a battery status, a temperature, a time, and an error. According to one embodiment, the patient display device is configured to encrypt the user input. According to one embodiment, the display is configured to encrypt the user input for decryption by the implantable medical device. According to one embodiment, the patient display device is configured to decrypt the control interface received from the patient external device, for displaying the control interface on the display. According to one embodiment, at least one of the first and second application is configured to receive data from an auxiliary external device and present the received data to the user. According to one embodiment, at least one of the first and second application is configured to receive data from an auxiliary external device comprising a scale for determining the weight of the user. According to one embodiment, at least one of the first and second application is configured to receive data related to the weight of the user from an auxiliary external device comprising a scale. According to one embodiment, the patient display device is configured to: wirelessly transmit the data related to the weight of theuser to the patient external device, or wirelessly transmit an instruction derived from the data related to the weight of the user, or wirelessly transmit an instruction derived from a combination of the data related to the weight of the user and the implant control input received from the user. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new private key device, wherein the HCP or HCP admin have such master private key device adapted to able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A communication system for enabling communication between a patient display device and an implantable medical device, when implanted, is provided. The communication system comprises a patient display device, a server or DDI, and a patient remote external device. The patient display device comprises a wireless communication unitconfigured for wirelessly receiving an implant control interface as a remote display portal from the patient remote external device, the wireless communication unit further being configured for wirelessly transmitting implant control user input to the patient remote external device, a display for displaying the received implant control interface as a remote display portal, and an input device for receiving implant control input from the user. The patient display device is configured to run a first application for wireless communication with the server, and to run a second application for wireless communication with the patient remote external device for transmission of the implant control input to the remote display portal of the patient remote external device for the communication with the implantable medical device. The patient remote external device comprises a wireless communication unit configured for wireless transmission of control commands based on the implant control input to the implantable medical device and configured for wireless communication with the patient display device. According to one embodiment, the patient display device comprises a first log-in function and a second log-in function, and wherein the first log-in function gives the user access to the first application and wherein the first and second log-in function in combination gives the user access to the second application. According to one embodiment, the second application is configured to receive data related to a parameter of the implanted medical device. According to one embodiment, the second application is configured to receive data related to a sensor value received from the implanted medical device. According to one embodiment, the second application is configured to receive data related to a parameter related to at least one of: a battery status, a temperature, a time, or an error. According to one embodiment, the patient display device is configured to encrypt the user input. According to one embodiment, the display is configured to encrypt the user input for decryption by the implantable medical device. According to one embodiment, the patient remote external device is configured to act as a router, transferring the encrypted user input from the patient display device to the implantable medical device without decryption. According to one embodiment, the patient remote external device is configured to encrypt at least one of the control interface and the control commands. According to one embodiment, the patient remote external device is configured to encrypt the control interface and wherein the patient display device is configured to decrypt the encrypted control interface. A computer program product is provided, configured to run in a patient display device comprising a wireless communication unit,a display for displaying the received implant control interface as a remote display portal, and an input device for receiving implant control input from a user. The computer program product comprises: a first application for communication with a server or DDI, a second application for communication with an patient remote external device for transmission of the implant control input via the remote display portal of the patient remote external device for the communication with an implantable medical device, wherein the second application is configured to be accessed through the first application, a first log-in function using at least one of a password, pin code, fingerprint, or face recognition, and a second log-in function within the first application, using a private key from the user to authenticate for a defined time period a second hardware key of the patient remote external device. The first log-in function gives the user access to the first application and the first and second log-in function in combination gives the user access to the second application. According to one embodiment, the second application is configured to receive data related to a parameter of the implanted medical device. According to one embodiment, the second application is configured to receive data related to a sensor value received from the implanted medical device. According to one embodiment, the second application is configured to receive data related to a parameter related to at least oneof: a battery status, a temperature, a time, or an error. According to one embodiment of the communication system, patient display device or computer program product, the implantable medical device comprises at least one of: an external heart compression device, an apparatus assisting the pump function of a heart of the patient, an apparatus assisting the pump function comprising a turbine bump placed within a patient’s blood vessel for assisting the pump function of the heart, an operable artificial heart valve, an operable artificial heart valve for increasing the blood flow to the coronary arteries. an implantable drug delivery device, an implantable drug delivery device for injecting directly into a blood vessel and change the position of the injection site, all from within the patient’s body, an implantable drug delivery device for injecting potency enhancing drugs into an erectile tissue of the patient, a hydraulic, mechanic, and/or electric constriction implant, an operable volume filling device,an operable gastric band, an operable implant for stretching the stomach wall of the patient for creating satiety, an implant configured to sense the frequency of the patient ingesting food, an operable cosmetic implant, an operable cosmetic implant for adjust the shape and/or size in the breast region of a patient, an implant controlling medical device for the emptying of a urinary bladder, an implant hindering urinary leakage, an implant hindering anal incontinence, an implant controlling the emptying of fecal matter, an implant monitoring an aneurysm, an implant for hindering the expansion of an aneurysm, an implant lubricating a joint, an implant for affecting the blood flow to an erectile tissue of the patient, an implant for simulating the engorgement of an erectile tissue, an implant with a reservoir for holding bodily fluids, an implant storing and/or emptying a bodily reservoir or a surgically created reservoir, an implant communicating with a database outside the body, an implant able to be programmed from outside the body, an implant able to be programmed from outside the body with a wireless signal, an implant treating impotence, an implant controlling the flow of eggs in the uterine tube, an implant controlling the flow of sperms in the uterine tube, an implant controlling the flow of sperms in the vas deferens, an implant for hindering the transportation of the sperm in the vas deferens, an implant treating osteoarthritis, an implant performing a test of parameters inside the body, an implant controlling specific treatment parameters from inside the body, an implant controlling bodily parameters from inside the body, an implant controlling the blood pressure, an implant controlling the blood pressure by affecting the dilatation of the renal artery, an implant controlling a drug treatment parameter, an implant controlling a parameter in the blood, an implant for adjusting or replacing any bone part of a body of the patient, an implant replacing an organ of the patient or part of an organ of the patient or the function thereof, a vascular treatment device, an implant adapted to move fluid inside the body of the patient, an implant configured to sense a parameter related to the patient swallowing, an implant configured to exercise a muscle with electrical or mechanical stimulation, an implant configured for emptying an intestine portion on command, an operable implant configured to be invaginated in the stomach of the patient to reduce the volume of the stomach substantially more than the volume of the device, an implant configured for emptying the urinary bladder from within the patient’s body by compressing the bladder, an implant configured for draining fluid from within the patient’s body, an implant configured for the active lubrication of a joint with an added lubrication fluid, an implant configured for removing clots and particles from the patient’s blood stream, an implant configured for elongating or straightening a bone in the patient, to reduce scoliosis, a device to stimulate the brain for a several position to a focused point, an artificial stomach replacing the function of the natural stomach, an implant configured for adjusting the position of a female’s urinary tract or bladder neck, an implant configured for stimulating the ampulla vas deference and creating temporary constriction. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new private key device, wherein the HCP or HCP admin have such master private key device adapted to able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A communication system for enabling communication between a patient display device, a patient external device, a server and an implantable medical device, is provided. The communication system comprises a server, a patient display device, a patient external device, and an implantable medical device. The patient display device comprises a wireless communication unit for wirelessly communicating withat least one of the patient external device and the server, a display, and an input device for receiving input from the user. The patient external device comprises a wireless communication unit configured for wireless transmission of control commands to the implantable medical device and configured for wireless communication with at least one of the patient display device and the server. Further, the servercomprises a wireless communication unit configured for wireless communication with at least one of the patient display device and the patient external device, wherein the implantable medical device comprises a wireless communication unit configured for wirelesscommunication with the patient external device. The implantable medical device further comprises an encryption unit and is configured to: encrypt data destined for the server, transmit the data to the server via the patient external device, wherein the patient external device acts as a router transferring the data without full decryption. In an example, the implantable medical device comprises an encryption unit and is configured to: encrypt data destined for the patient display device, transmit the data to the patient display device via the patient external device, wherein the patient external device acts as a router transferring the data without full decryption. In an example, the server comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient external device, wherein the patient external device acts as a router transferring the datawithout full decryption, In an example, the server comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient display device and the patient external device, wherein the patient display device and the patient external device acts as a router transferring the data without full decryption. In an example, the patient display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient external device, wherein the patient external device acts as a router transferring the data without full decryption. In an example, the patient display device comprises an encryption unit and is configured to: encrypt data destined for theimplantable medical device, transmit the data to the implantable medical device via the server and the patient external device, wherein the server and the patient external device acts as a router transferring the data without full decryption. According to one embodiment, the patient display device is configured to wirelessly receive an implant control interface from the patient external device to be displayed on the display. According to one embodiment, at least two of: the wireless communication unit of the server, the wireless communication unit of the patient display device, the wireless communication unit of the patient external device, and the wireless communication unit of the implantable medical device, are configured for wireless communication using a standard network protocol. According to one embodiment, wherein at least two of: the wireless communication unit of the server, the wireless communication unit of the patient display device, the wireless communication unit of the patient external device, and the wireless communication unit of the implantable medical device, are configured for wireless communication using a proprietary network protocol. According to one embodiment, the wireless communication unit of the patient external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the server, or use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the patient display device. According to one embodiment, the wireless communication unit of the patient external device is configured to use a firstfrequency band for communication with the implantable medical device and use a second frequency band for communication with the server, or use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the patient display device. According to one embodiment, the wireless communication unit of the patient display device is configured to use a first network protocol for communication with the patient external device and use a second network protocol for communication with the server. According to one embodiment, the wireless communication unit of the patient display device is configured to use a first frequency band for communication with the patient external device and use a second frequency band for communication with the server. According to one embodiment, the wireless communication unit of the server is configured to use a first network protocol for communication with the patient external device and use a second network protocol for communication with the patient display device. According to one embodiment, the wireless communication unit of the server is configured to use a first frequency band for communication with the patient external device and use a second frequency band for communication with the patient display device. According to one embodiment, the wireless communication unit of at least one of the server, the patient display device, the patient external device, and the implantable medical device comprises a Bluetooth transceiver. According to one embodiment, the wireless communication unit of at least one of the server, the patient display device, the patient external device, and the implantable medical device comprises a UWB transceiver. According to one embodiment, the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, the wireless communication unit of the patient external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the server, and wherein the second wireless transceiver has a longer effective range than the first wireless transceiver. According to one embodiment, the wireless communication unit of the patient external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the patient display device, and wherein the second wireless transceiver has a longer effective range than the first wireless transceiver. According to one embodiment, the wireless communication unit of the patient display device comprises a first wireless transceiver for wireless communication with the patient external device, and a second wireless transceiver for wireless communication with the server, and wherein the second wireless transceiver has a longer effective range than the first wireless transceiver. According to one embodiment, the second wireless transceiver has an effective range being one of: 2 times, 4 times, 8 times 20 times, 50 times or 100 times longer than the first wireless transceiver. According to one embodiment, the second wireless transceiver is configured to be disabled to enable wireless communication using the first wireless transceiver. According to one embodiment, at least one of: the patient display device is configured to authenticate the patient external device if a distance between the patient display device and the patient external device is less than a predetermined threshold value, the patient display device is configured to be authenticated by the patient external device if a distance between the patient display device and the patient external device is less than a predetermined threshold value, the patient display device is configured to authenticate the implantable medical device if a distance between the patient display device and the implantable medical device is less than a predetermined threshold value, the patient display device is configured to be authenticated by the implantable medical device if a distance between the patient display device and the implantable medical device is less than a predetermined threshold value, the patient external device is configured to authenticate the patient display device if a distance between the patient external device and the patient display device is less than a predetermined threshold value, the patient external device is configured to be authenticated by the patient display device if a distance between the patient external device and the patient display device is less than a predetermined threshold value, the patient external device is configured to authenticate the implantable medical device if a distance between the patient external device and the implantable medical device is less than a predetermined threshold value, and the patient external device is configured to be authenticated by the implantable medical device if a distance between the patient external device and the implantable medical device is less than a predetermined threshold value. According to one embodiment, the patient display device is configured to allow the transfer of data between the patient display device and the patient external device on the basis of the authentication. According to one embodiment, the patient external device is configured to allow the transfer of data between the patient display device and the patient external device on the basis of the authentication. According to one embodiment, the patient external device is configured to allow the transfer of data between the patient external device and the implantable medical device on the basis of the authentication. According to one embodiment, the patient display device is a wearable patient external device or a handset. According to one embodiment, the data encrypted by the implantable medical device is related to at least one of: a battery status, a temperature, a time, or an error. A server for use in the communication system according to any one of the above embodiments is provided. A patient display device for use in the communication system according to any one of the above embodiments is provided. A patient external device for use in the communication system according to any one of the above embodiments is provided. An implantable medical device for use in the communication system according to any one of the above embodiments is provided. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new private key device, wherein the HCP or HCP admin have such master private key device adapted to able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A system configured for changing pre-programmed treatment settings of an implantable medical device, when implanted in a patient, from a distant remote location in relation to the patient, is provided. The system comprises at least one health care provider, HCP,EID external device, and a HCP private key device. HCP EID external device is adapted to receive a command from the HCP to change said pre-programmed treatment settings of an implanted medical device, and further adapted to be activated and authenticated and allowed to perform said command by the HCP providing the HCP private key device, wherein the HCP private key device is adapted to be provided to the HCP EID external device via at least one of: a reading slot or comparable for the HCP private key device, and a RFID communication or other close distance wireless activation communication. The HCP EID external device comprises at least one of: a reading slot or comparable for the HCP private key device, a RFID communication, and other close distance wireless activation communication or electrical direct contact. The HCP EID external device further comprises at least one wireless transceiver configured for communication with a data infrastructure server, DDI, through a first network protocol. Further, the system comprises a data infrastructure server, DDI, adapted to receive command from said HCP EID external device and to relay the received command without modifying said command to a patient EID external device,wherein the DDI comprises one wireless transceiver configured for communication with said patient external device, and a patient EID external device adapted to receive the command relayed by the DDI, further adapted to send this command to the implanted medical device, further adapted to receive a command from the HCP EID external device via the DDI to change said pre-programmed treatment settings of the implanted medical device, and further adapted to be activated and authenticated and allowed to perform said command by the patient providing a patient private key device adapted to be provided to the patient EID external device by the patient via at least one of: a reading slot or comparable for the patient private key device, a RFID communication or other close distance wireless activation communication orelectrical direct contact. The patient EID external device comprises at least one of a reading slot or comparable for the HCP private key device, a RFID communication, and other close distance wireless activation communication or electrical direct contact. The patient EID external device further comprises at least one wireless transceiver configured for communication with the implanted medical device through a second network protocol. Further, the implanted medical device is configured to treat the patient or perform a bodily function. According to one embodiment, at least one of the patient private key device or HCP private key device comprises a hardware key. According to one embodiment, the private key device is at least one of, a smartcard, a key-ring device, a watch an arm or wrist band a neckless or any shaped device. According to one embodiment of the system, at least two of: the HCP EID external device, the patient EID external device, the HCP private key device, the patient private key device, and the DDI are configured for wireless communication using a standard network protocol. According to one embodiment, at least two of: the HCP EID external device, the patient EID external device, the HCP private key device, the patient private key device, and the DDI are configured for wireless communication using a proprietary network protocol. According to one embodiment, the patient EID external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the DDI. According to one embodiment, the patient EID external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the DDI. According to one embodiment, the DDI is configured to use a first frequency band for communication with the patient EID external device and a second frequency band for communication with the patient private key device. According to one embodiment, at least one of the HCP EID external device, the patient EID external device, the HCP private key device, the patient private key device and the DDI comprises a Bluetooth transceiver. According to one embodiment, at least one of the HCP EID external device, the patient EID external device, the HCP private key device, the patient private key device and the DDI comprises a UWB transceiver. According to one embodiment, the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, the patient EID external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the DDI, and wherein the second wireless transceiver has longer effective range than the first wireless transceiver. According to one embodiment, the patient private key device comprises a first wireless transceiver for wireless communication with the HCP EID external device, and a second wireless transceiver for wireless communication with the DDI, and wherein the second wireless transceiver has longer effective range than the first wireless transceiver. According to one embodiment, the second wireless transceiver has an effective range being one of: 2 times, 4 times, 8 time, 20 times, 50 times or 100 times longer than the effective range of the first wireless transceiver. According to one embodiment, the second wireless transceiver is configured to be disabled to enable wireless communication using the first wireless transceiver. According to one embodiment, the patient EID external device is configured to allow transfer of data between the EID external device and the implantable medical device on the basis of an authentication of the patient EID external device. According to one embodiment, the patient EID external device is a wearable patient external device or a handset. According to one embodiment, the data encrypted by the implantable medical device is related to at least one of: a battery status, a temperature, a time, or an error. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new private key device, wherein the HCP or HCP admin have such master private key device adapted to able to replace and pair a new patient privatekey device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A system is provided, configured for changing pre-programmed treatment settings of an implantable medical device, when implanted in a patient, by a health care provider, HCP, in the physical presence of the patient. The system comprises at least one HCP EID external device adapted to receive a command from the HCP, directly or indirectly, to change said pre-programmed treatment settings in steps of an implantable medical device, when implanted, wherein the HCP EID external device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing an HCP private key device comprising a HCP private key. The HCP private key device comprises at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device. The HCP EID external device is adapted to be involved in at least one of: receiving information from the implant, receiving information from a patient remote external device, actuating the implanted medical device, changing pre-programmed settings, and updating software of the implantable medical device, when implanted. The HCP EID external device is further adapted to be activated, authenticated, and allowed to perform said command also by the patient. The system further comprises a patient private key device comprising a patient private key, wherein the patient private key device comprising at least one of: a smart card, a keyring device, a watch, a arm or wrist band,a necklace, and any shaped device. The HCP private key and the patient private key are required for performing said actions by the HCP EID external device to at least one of: receive information from the implant, to receive information from a patient remote external device, to actuate the implanted medical device, to change pre-programmed settings, and to update software of the implantable medical device, when the implantable medical device is implanted. According to one embodiment, the HCP EID external device further comprises a wireless transceiver configured for communication with the implanted medical device through a second network protocol. According to one embodiment, the HCP private key device is adapted to be provided to the at least one HCP external device via at least one of: a reading slot or comparable for the HCP private key device, a RFID communication, and a close distance wireless activation communication unit, or electrical direct contact. According to one embodiment, the HCP EID external device comprises at least one of reading slot or comparable for the HCP private key device, a RFID communication and a close distance wireless activation communication unit, or electrical direct contact. According to one embodiment, the HCP EID external device is adapted to receive a command from a HCP dedicated device to change said pre-programmed treatment steps of the implantable medical device, when implanted, wherein the HCP dedicated device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing their private key. According to one embodiment, at least two of: the HCP EID external device, the patient EID external device, the HCP private key device, and the patient private key device, are configured for wireless communication using a standard network protocol. According to one embodiment, at least two of: the HCP EID external device, the patient EID external device, the HCP private key device, and the patient private key device, are configured for wireless communication using a proprietary network protocol. According to one embodiment, the patient EID external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the patient private key device. According to one embodiment, the patient EID external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the patient private key device. According to one embodiment, at least one of the HCP EID external device, the patient EID external device, the HCP private key device, and the patient private key device comprises a Bluetooth transceiver. According to one embodiment, at least one of the HCP EID external device, the patient EID external device, the HCP private key device, and the patient private key device comprises a UWB transceiver. According to one embodiment, the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, the patient EID external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the patient private key device, and wherein the second wireless transceiver has longer effective range than the first wireless transceiver. According to one embodiment, the second wireless transceiver has an effective range being one of: 2 times, 4 times, 8 time, 20 times, 50 times or 100 times longer than the effective range of the first wireless transceiver. According to one embodiment, the second wireless transceiver is configured to be disabled to enable wireless communication using the first wireless transceiver. According to one embodiment, the patient EID external device is configured to allow transfer of data between the EID external device and the implantable medical device on the basis of an authentication of the patient EID external device. According to one embodiment, the patient EID external device is a wearable patient external device or a handset. According to one embodiment, the data encrypted by the implantable medical device is related to at least one of: a battery status, a temperature, a time, or an error. A system is provided, configured to change pre-programmed and pre-selected treatment actions of an implantable medical device, when implanted in a patient, by command from the patient. The system comprises an implantable medical device, a patient remoteexternal device, a wireless transceiver configured for communication with the implantable medical device, when the medical device isimplanted, through a second network protocol, and a remote display portal. The remote display portal is configured to receive content delivered from the patient remote external device to expose buttons to express the will to actuate the functions of the implanted medical device by the patient through the patient remote external device, and further configured to present the display portal remotely on a patient display device allowing the patient to actuate the functions of the implanted medical device through the display portal of the patient remote external device visualized on the patient display device. According to one embodiment, the wireless transceiver, the remote display portal, and the remote display portal are comprised in the patient remote external device. According to one embodiment, the system further comprises the patient display device, which may comprise a supporting application, a display which hosts the Remote Display Portal, and a patient display device private key. According to one embodiment, the remote display portal is capable of generating a command to be signed by the patient display device private key. According to one embodiment, the patient remote external device is adapted to accept input from the patient via said patient display device through its remote display portal. According to one embodiment, the patient remote external device comprises a graphical user interface arranged on a touch-responsive display exposing buttons to express actuation functions of the implanted medical device. According to one embodiment, the system is configured to allow the patient to actuate the implant at home through the patient remote external device by means of an authorization granted by a patient private key. According to one embodiment, the patient private key comprises at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device. According to one embodiment, the system is configured to allow the patient to actuate the implantable medical device, when implanted, at home through the patient remote external device, using an authorization granted by the patient private key. According to one embodiment, system further comprises a patient EID external device comprising at least one of: a reading slot or comparable for the patient private key device, a RFID communication, and a close distance wireless activation communication, or electrical direct contact. According to one embodiment, the patient EID external device is adapted to be synchronized with the patient remote external device. According to one embodiment, the patient EID external device further comprises at least one of: a wireless transceiver configured for communication with the patient, a remote external device, and a wired connector for communication with the patient remote external device. According to one embodiment, the patient EID external device is adapted to generate an authorization to be signed by the patient private key to be installed into at least one of: the patient remote external device through the patient EID external device, and the implantable medical device. According to one embodiment, the system comprises a patient display device comprising a supporting application capable of displaying the remote display portal with content delivered from the patient remote external device. According to one embodiment, the remote display portal and patient remote external device are adapted to expose buttons to express the will to actuate the functions of the implanted medical device by the patient through the patient remote external device. According to one embodiment, the patient display device comprises at least one of: a display which hosts the remote display portal, and a patient display device private key. According to one embodiment, the remote display portal is capable of generating a command to be signed by the patient private key. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new private key device, wherein the HCP or HCP admin have such master private key device adapted to able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A system is provided, configured for providing information from an implantable medical device, when implanted in a patient, from a distant remote location in relation to the patient. The system comprises at least one patient EID external device adapted to receive information from the implant, adapted to send such information further on to a server or dedicated data infrastructure, DDI, further adapted to be activated and authenticated and allowed to receive said information by the implanted medical device by the patient providing a private key. Further, the system comprises a patient private key device comprising the private key adapted to be provided to the patient EIDexternal device via at least one of: a reading slot or comparable for the patient private key device, a RFID communication or other close distance wireless activation communication or direct electrical connection. The patient EID external device comprises at least one of: areading slot or comparable for the patient private key device, an RFID communication, and other close distance wireless activation communication or direct electrical contact. Further, the patient EID external device comprises at least one wireless transceiver configuredfor communication with the DDI, through a first network protocol. According to one embodiment, the at least one patient EID external device is adapted to receive information from the implant, through a second network protocol. According to one embodiment, the system comprises the DDI, wherein the DD1 is adapted to receive information from said patient EID external device, and wherein the DDI comprises a wireless transceiver configured for communication with said patient EID external device. According to one embodiment, the patient EID external device is adapted to receive a command relayed by the DDI, to further send the command to the implanted medical device to change said pre-programmed treatment settings of the implanted medical device, and further adapted to be activated and authenticated and allowed to perform said command by the patient providing the patient private key. According to one embodiment, the patient private key device is adapted to provide the patient private key to the patient EID external device by the patient via at least one of; a reading slot or comparable for the patient private key device, an RFID communication or other close distance wireless activation communication, or electrical direct contact. According to one embodiment, the patient EID external device comprises at least one of: a reading slot or comparable for the HCP private key device, a RFID communication, and other close distance wireless activation communication, or direct electrical contact. According to one embodiment, the patient EID external device further comprising at least one wireless transceiver configured for communication with the implanted medical device through a second network protocol. According to one embodiment, the system comprises the implantable medical device, which may be adapted to, when implanted, treat the patient or perform a bodily function. According to one embodiment, the patient private key comprises at least one of: a smart card, a keyring device, a watch, an arm band or wrist band, a necklace, and any shaped device. According to one embodiment, at least two of: the patient EID external device, the IDD, and the patient private key device, are configured for wireless communication using a standard network protocol. According to one embodiment, at least two of: the patient EID external device, the IDD, and the patient private key device, are configured for wireless communication using a proprietary network protocol. According to one embodiment, the patient EID external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the patient private key device. According to one embodiment, the patient EID external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the patient private key device. According to one embodiment, at least one of the patient EID external device, the patient private key device and the IDD comprises a Bluetooth transceiver. According to one embodiment, at least one of the patient EID external device, the patient private key device and the IDD comprises a UWB transceiver. According to one embodiment, the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, the patient EID external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the patient private key device, and wherein the second wireless transceiver has longer effective range than the first wireless transceiver. According to one embodiment, the second wireless transceiver has an effective range being one of: 2 times, 4 times, 8 time, 20 times, 50 times or 100 times longer than the effective range of the first wireless transceiver. According to one embodiment, the second wireless transceiver is configured to be disabled to enable wireless communication using the first wireless transceiver. According to one embodiment, the patient EID external device is a wearable patient external device or a handset. According to one embodiment, the data encrypted by the implantable medical device is related to at least one of: a battery status, a temperature, a time, or an error. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new private key device, wherein the HCP or HCP admin have such master private key device adapted to able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A system is provided, comprising, an implantable medical device adapted to, when implanted in a patient, to communicate with an external device, the external device comprising at least one of a patient remote external device or a patient EID external device. The system further comprises the patient EID external device adapted to communicate with and send commands to the implantable medical device when implanted, to change pre-programmed settings, and a patient private key device comprising a patient private key, adapted to activate and authenticate and allow to perform said command by the patient EID external device, wherein said private key is adapted to be provided to the external device via at least one of: a reading slot or comparable for the HCP private key device, an RFID communication or other close distance wireless activation communication, or direct electrical contact. Further the system comprises a data infrastructure server, DDI, adapted to send commands to the patient EID external device for further transport to the implanted medical device, to inactivate the authority and authenticating function of the patient private key. According to one embodiment, the at least one patient remote external device comprises a patient remote external device private key, wherein the DDI via the patient EID external device is able to inactivate the authority and authenticating function of the patient remote external device, thereby inactivating the patient remote external device. According to one embodiment, the patient EID external device comprises at least one wireless transceiver configured for communication with the DD1 via a first network protocol. According to one embodiment, the system comprises the DDI, wherein the DDI is adapted to receive command from a HCP EID external device, and to send the received command to the patient EID external device, wherein the DDI comprises a wireless transceiver configured for communication with said patient external device. According to one embodiment, the patient EID external device is adapted to receive the command from the DDI, wherein thecommand originates from a health care provider, HCP, and wherein the patient EID is adapted to inactivate the patient private key and to send the command to the implanted medical device. According to one embodiment, the patient EID external device is adapted to receive the command from the DDI, wherein the command originates from a health care provider, HCP, wherein the patient EID external device is adapted to receive the command from theHCP via the DDI to inactivate the patient remote external device comprising a patient remote external device private key, and wherein the patient EID external device is further adapted to send this command to the implanted medical device. According to one embodiment, the patient EID external device further comprises at least one wireless transceiver configured for communication with the implanted medical device through a second network protocol. According to one embodiment, at least one of the patient private key and a patient remote external device private key comprises a hardware key. According to one embodiment, the private key device is at least one of, a smartcard, a key-ring device, a watch an arm or wrist band a neckless or any shaped device. According to one embodiment, at least two of: the patient remote external device, the patient EID external device, the patient private key device, and the DDI, are configured for wireless communication using a standard network protocol. According to one embodiment, wherein at least two of: the patient remote external device, the patient EID external device, the patient private key device, and the DDI, are configured for wireless communication using a proprietary network protocol. According to one embodiment, the patient EID external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the patient private key device. According to one embodiment, the patient EID external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the patient private key device. According to one embodiment, at least one of the patient remote external device, the patient EID external device, the patient private key device, and the DDI, comprise a Bluetooth transceiver. According to one embodiment, at least one of the patient remote external device, the patient EID external device, the patient private key device, and the DDI, comprise an UWB transceiver. According to one embodiment, the standard network protocol is one from the list of: Radio Frequency type protocol, RFID typeprotocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, the patient EID external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the patient private key device, and wherein the second wireless transceiver has longer effective range than the first wireless transceiver. According to one embodiment, the second wireless transceiver has an effective range being one of: 2 times, 4 times, 8 time, 20 times, 50 times or 100 times longer than the effective range of the first wireless transceiver. According to one embodiment, the second wireless transceiver is configured to be disabled to enable wireless communication using the first wireless transceiver. According to one embodiment, the patient EID external device is a wearable patient external device or a handset. According to one embodiment, the data encrypted by the implantable medical device is related to at least one of: a battery status, a temperature, a time, or an error. According to one embodiment, the system comprises a master private key device configured to allow issuance of new private key device, wherein the HCP or HCP admin have such master private key device adapted to be able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A system is provided, configured for changing pre-programmed treatment settings in steps of an implantable medical device, when implanted in a patient, by a health care provider, HCP, either in the physical presence of the patient or remotely with the patient on distance. The system comprises at least one HCP EID external device adapted to receive a command directly or indirectly from the HCP to change said pre-programmed treatment settings in steps of the implantable medical device, when implanted. The HCP EID external device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing a HCP private key device comprising a HCP private key. The HCP private key comprises at least one of: a smart card, a keyring device, a watch, an arm or wrist band, a necklace, and any shaped device. The system further comprises a patient private key device comprising a patient private key, comprising at least one of: a smart card, a keyring device, a watch, an arm or wrist band, a necklace, and any shaped device. Both the HCP and patientprivate key is required for performing said action by the HCP EID external device to change the pre-programmed settings in the implant and to update software of the implantable medical device, when the implantable medical device is implanted. The patient private key is adapted to activate, be authenticated, and allowed to perform said command provided by the HCP, either via the HCP EID external device or when the action is performed remotely via a patient EID external device.According to one embodiment, the system comprises a master private key device that allow issuance of new private key devicewherein the HCP or HCP admin have such master private key device adapted to be able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system further comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system further comprises a food sensor adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is configured to be connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. According to one embodiment, the HCP EID external device further comprises a wireless transceiver configured for communication with the implanted medical device through a second network protocol. According to one embodiment, the HCP private key device is adapted to be provided to the at least one HCP external device via at least one of: a reading slot or comparable for the HCP private key device, a RFID communication, and a close distance wireless activation communication unit, or electrical direct contact. According to one embodiment, the HCP EID external device comprises at least one of: reading slot or comparable for the HCPprivate key device, a RFID communication, and a close distance wireless activation communication unit, or electrical direct contact. According to one embodiment, the HCP EID external device is adapted to receive a command from an HCP dedicated device to change said pre-programmed treatment steps of the implantable medical device, when implanted, wherein the HCP dedicated device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing their private key. According to one embodiment, the HCP EID external device and the HCP private key device are configured for wireless communication using a standard network protocol. According to one embodiment, the HCP EID external device and the HCP private key device are configured for wireless communication using a proprietary network protocol. According to one embodiment, the HCP EID external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the HCP private key device. According to one embodiment, the HPC EID external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the HCP private key device. According to one embodiment, at least one of the HCP EID external device and the HCP private key device comprises a Bluetooth transceiver. According to one embodiment, at least one of the HCP EID external device and the HCP private key device comprises a UWB transceiver. A system is provided, configured for changing pre-programmed treatment settings in steps of an implantable medical device, when implanted in a patient, by a health care provider, HCP, with the patient on remote on distance. The system comprises at least one HCPEID external device adapted to receive a command from the HCP direct or indirect, to change said pre-programmed treatment settings in steps of an implantable medical device, when implanted, wherein the HCP EID external device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP. The action by the HCP EID external device to change pre-programmed settings in the implant and to update software of the implantable medical device, when the implantable medical device is implanted, is adapted to be authenticated by a HCP private key device and a patient private key device. According to one embodiment, the HCP private key device comprising a HCP private key, comprising at least one of: a smart card,a keyring device, a watch, an arm or wrist band, a necklace, and any shaped device. According to one embodiment, the patient private key device comprises a patient private key, comprising at least one of: a smart card, a keyring device, a watch, an arm or wrist band, a necklace, and any shaped device. According to one embodiment, the patient private key is adapted to activate, be authenticated, and allowed to perform said command provided by the HCP, either via the HCP EID external device or when the action is performed remotely via a patient EID external device. According to one embodiment, the system further comprises a dedicated data infrastructure, DDI, the patient EID external device,and the HCP EID external device, wherein the communication between the patient EID external device and the HCP EID external device is performed via the DDI. According to one embodiment, the system comprises a master private key device that allows issuance of new private key device wherein the HCP or HCP admin have such master private key device adapted to be able to replace and pair a new patient private key device or HCP private key device into the system. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system further comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallow solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. According to one embodiment, the HCP EID external device further comprises a wireless transceiver configured forcommunication with the implanted medical device through a second network protocol. According to one embodiment, the HCP private key device is adapted to be provided to the at least one HCP external device via at least one of: a reading slot or comparable for the HCP private key device, a RFID communication, and a close distance wireless activation communication unit, or electrical direct contact. According to one embodiment, the HCP EID external device comprises at least one of: reading slot or comparable for the HCP private key device, a RFID communication, and a close distance wireless activation communication unit, or electrical direct contact. According to one embodiment, the HCP EID external device is adapted to receive a command from an HCP dedicated device to change said pre-programmed treatment steps of the implantable medical device, when implanted, wherein the HCP dedicated device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing their private key. According to one embodiment, the HCP EID external device and the HCP private key device are configured for wireless communication using a standard network protocol. According to one embodiment, the HCP EID external device and the HCP private key device are configured for wireless communication using a proprietary network protocol. According to one embodiment, the HCP EID external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the HCP private key device. According to one embodiment, the HPC EID external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the HCP private key device. According to one embodiment, at least one of the HCP EID external device and the HCP private key device comprises a Bluetooth transceiver. According to one embodiment, at least one of the HCP EID external device and the HCP private key device comprises a UWB transceiver. A system is provided, which is configured for changing pre-programmed treatment settings of an implantable medicaldevice, when implanted in a patient, from a distant remote location in relation to the patient. The system comprises at least one health care provider, HCP, external device adapted to receive a command from the HCP to change said pre-programmed treatment settings of an implanted medical device. The HCP external device is further adapted to be activated and authenticated and allowed to perform said command by the HCP providing a HCP private key device adapted to be provided to an HCP EID external device via at least one of; a reading slot or comparable for the HCP private key device, a RFID communication or other close distance wireless activation communication. The HCP EID external device comprises at least one of: a reading slot or comparable for the HCP private key device, a RFID communication, and other close distance wireless activation communication or electrical direct contact. The HCP EID external device further comprises at least one wireless transceiver configured for communication with a patient EID external device, through a first network protocol. The system comprises the patient EID external device, the patient EID external device being adapted to receive command from said HCP external device, and to relay the received command without modifying said command to the implanted medical device. The patient EID external devicecomprises one wireless transceiver configured for communication with said patient external device, wherein the patient EID is adapted to send the command to the implanted medical device, to receive a command from the HCP to change said pre-programmed treatment settings of the implanted medical device, and further to be activated and authenticated and allowed to perform said command by the patient providing a patient private key device comprising a patient private key. According to one embodiment, at least one of the patient private key device or HCP private key device comprises a hardware key. According to one embodiment, the private key device is at least one of, a smartcard, a key-ring device, a watch an arm or wrist band a neckless or any shaped device. According to one embodiment, the system comprises a master private key device that allow issuance of new private key devicewherein the HCP or HCP admin have such master private key device adapted to be able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device is an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallow solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. According to one embodiment, the HCP EID external device further comprises a wireless transceiver configured for communication with the implanted medical device through a second network protocol. According to one embodiment, the HCP private key device is adapted to be provided to the at least one HCP external device via at least one of; a reading slot or comparable for the HCP private key device, a RFID communication, and a close distance wireless activation communication unit, or electrical direct contact. According to one embodiment, the HCP EID external device comprises at least one of: reading slot or comparable for the HCP private key device, a RFID communication, and a close distance wireless activation communication unit, or electrical direct contact. According to one embodiment, the HCP EID external device is adapted to receive a command from an HCP dedicated device to change said pre-programmed treatment steps of the implantable medical device, when implanted, wherein the HCP dedicated device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing their private key. According to one embodiment, the HCP EID external device and the HCP private key device are configured for wireless communication using a standard network protocol. According to one embodiment, the HCP EID external device and the HCP private key device are configured for wireless communication using a proprietary network protocol. According to one embodiment, the HCP EID external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the HCP private key device. According to one embodiment, the HPC EID external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the HCP private key device. According to one embodiment, at least one of the HCP EID external device and the HCP private key device comprises a Bluetooth transceiver. According to one embodiment, at least one of the HCP EID external device and the HCP private key device comprises a UWB transceiver. An external system for providing remote instructions to an implantable medical device is further provided. The external system being configured to provide instructions to be transmitted to the implantable medical device, derive a checksum from the instructions, electronically sign the instructions and the checksum. The external system is further configured to form a data packet from the instructions, the electronic signature and the checksum. The implantable medical device further comprises a wireless transmitter configured to wirelessly send the data packet to the implantable medical device. The external system may further be configured to encryptthe data packet at the external system. The checksum is configured to verify that no changes have been made to the bit stream forming the instructions. According to one embodiment, the wireless transmitter is part of a wireless transceiver comprised in the external system. According to one embodiment, the external system comprises a first external device and a second external device, and the first external device is configured to transmit the data packet to the second external device, and the second external device is configured to transmit the data packet wirelessly to the implantable medical device without changing the data packet and/or without full decryption of the data packet. The external system may be configured to transmit at least one instruction for altering the control program of the implantable medical device, to the implantable medical device, which may include altering at least one parameter for affecting the control of the implantable medical device, which may include updating at least one parameter of the control program to a parameter value comprised in a set of parameter values stored in the implantable medical device. According to one embodiment, the first external device is configured to send the data packet from the first external device to the second external device using a first network protocol and send the data packet from the second external device to the implantable medical device using a second network protocol. According to one embodiment, the first external device is configured to send the data packet from the first external device to the second external device using wired communication and send the data packet from the second external device to the implantable medical device using wireless communication. According to one embodiment, the first external device is configured to wirelessly send the data packet from the first external device to the second external device using a first network protocol, and wirelessly send the data packet from the second external device to the implantable medical device using a second network protocol. According to one embodiment, the first external device is configured to wirelessly send the data packet from the first external device to the second external device using a first frequency band, and wirelessly send the data packet from the second external device to the implantable medical device using a second frequency band. According to one embodiment, the first external device is configured to wirelessly send the data packet from the first external device to the second external device using a first wireless technology, and wirelessly send the data packet from the second external device to the implantable medical device using a second wireless technology. According to one embodiment, the external system is configured to electronically sign the instructions at the external system using a key of the external system. The key may be a non-extractable key. According to one embodiment, the second external device is configured to perform a proof of possession operation comprising the steps of transmitting, form the first external device to the second external device, a query based on a public key associated with theprivate of the external system, receiving, at the second external device, a response based on the possession of the private key in the first external device, and verifying that the response based on the possession of the private key matches the query based on a public key. According to one embodiment, the first external device is configured to form the data packet and electronically sign the instruction using a first private key, and the second external device is configured to: receive the data packet from the first external device,verify that the first external device is a trusted transmitter, in response to the verification, electronically sign the data packet using a second private key, and transmit the data packet from the second external device to the medical implant. According to one embodiment, the first external device is configured to electronically sign the instructions and encrypt the data packet using a key placed on a key device external to the first external device. The external system may comprise a key device configured to hold at least one private key which is part of a public-private key pair used for asymmetric encryption. According to one embodiment, the key device comprises a wireless transmitter for wirelessly transmitting the at least one private key or a signal based on the private key, to the first external device. The second external device may be configured to at least one of: electronically sign the instructions and encrypt the data packet using a key placed on a key device external to the second external device. According to one embodiment, the external system further comprises a second key device configured to hold at least one second private key and the second key device may comprise a wireless transmitter for wirelessly transmitting the at least one private key or a signal based on the private key to the second external device. According to one embodiment, 5. the external system further comprises a second key device comprising a wireless transmitter for wirelessly transmitting at least one second private key or a signal based on the second private key to the first external device. According to one embodiment, at least one of the key device and the second key device comprises at least one of: a key card, a wearable device and a handset. The first and/or second external device may be configured to be unlocked by user credentials provided to the first external device. The user credentials may comprise a username and a password and/or a PIN-code. According to one embodiment, the first external device is configured to verify the user credentials by comparing the user credentials with user credentials stored in the first external device. The user credentials may be stored in the first external device by themanufacturer of the first external device. The user credentials may be stored as hardware or software in the first external device. According to one embodiment, the first external device is configured to verify the user credentials by communicating with a remote server. The external system may in any of the embodiments herein be configured to function without connection to the Internet and may be configured to communicate with the implantable medical device independently of time. The first and second private keys may be different in any of the embodiments. However, the first and second private keys may comprise at least one common element. At least one first and second external devices are configured to be unlocked by at least one of the first and second private key. According to one embodiment, the external system comprises a central server, and the central server is configured to form a data packet from the instructions, the electronic signature and the checksum and further configured to provide the formed data packet to the first external device. The central server may be accessed by at least one healthcare professional, such that the healthcare professional can provide input to the central server for forming the instructions to be sent to the implantable medical device. The central server may be accessed by at least one patient, such that the patient can provide input to the central server for verifying at least one of: the authenticity of the healthcare professional and the correctness of the instructions. The healthcare provider and/or the patient can electronically sign the instructions at the central server. According to one embodiment, the central server is configured to verify the authenticity of the first and second key and electronically sign the instructions using the first and second key. The second key may be a user key, and wherein the external system may be configured to use the second key for at least one of approving that communication is transmitted to the implantable medical device, and approving that a healthcare provider prepares an instruction to the implantable medical device. According to one embodiment, the approval step can be performed by first or second external device. According to one embodiment, the first key is required to create an instruction to the implantable medical device and the second key is required to transmit the created instruction to the implantable medical device. According to one embodiment, at least one of the first and second external device comprises an input button configured to beused for verifying user presence. According to one embodiment, the input button con be configured to replace at least one of: input of at least one key to at least one of the first and second external device, and input of credentials into at least one of the first and second external device. The input button may be configured to replace the second key. According to one embodiment, the external system is configured to transmit the data packet to the implantable medical device, and the data packet comprises at least one instruction signed by a first key and a public key including information about which root have created the public key. According to one embodiment, at least one of the first and second external device may be configured to enable communication with the implantable medical device based on at least one password being provided to at least one of the first and second external device. According to one embodiment, at least one of the first and second external device is configured to enable communication with the implantable medical device based on two passwords being provided to at least one of the first and second external device. According to one embodiment, at least one of the first and second external device is configured to enable communication with the implantable medical device based on one patient password and one healthcare provider password being provided to at least one of the first and second external device. According to one embodiment, at least one of the first and second external devices are configured to perform a verification query operation with at least one of the first and second key device, the verification query operation comprising: transmitting, from the firstor second external devices, a query comprising a computational challenge to at least one of the first and second key device, receiving, at the first or second external devices, a response based on the transmitted computational challenge, and verifying, at the first or second external devices, the received response. The verification query operation may be in the form of a proof of possession operation comprising: receiving a public key of at least one of the first and second key devices, the public key being associated with a private key of the first or second key device, transmitting, from at least one of the first and second external devices, a computational challenge to the first or second key device, based on the public key received from the first or second key device, receiving a response from the first or second key device based on the possession of the private key in the first or second key device, and verifying that the response based on the possession of the private key matches the query based on a public key. An implantable medical device configured to receive remote instructions from an external system is further provided. The implantable medical device comprises a wireless receiver configured to receive wirelessly transmitted data packets from the external system, a computing unit configured to: verify the electronic signature, and use a checksum provided in the data packet to verify the integrity of the instructions. The computing unit may further be configured to decrypt the data packet. The computing unit may be configured to use the checksum to verify that the bit stream making up the instructions is unchanged. The wireless receiver may be part of a wireless transceiver. According to one embodiment, the computing unit comprises a memory unit configured to store electronic signatures, and the computing unit may be configured to verify the electronic signature by comparing the electronic signature with the electronic signatures stored in the memory unit. According to one embodiment, the implantable medical device comprises a control program configured to control at least one function of the implantable medical device, and the computing unit may be configured to alter the control program on the basis of the received instructions. According to one embodiment, the implantable medical device comprises an internal computing unit configured to run a control program for controlling a function of the implantable medical device. The control program may comprise at least one adjustable parameter affecting the control of the implantable medical device, and the method of providing remote instructions may comprise providing instructions for altering the at least one parameter for affecting the control of the implantable medical device. According to one embodiment, the implantable medical device comprises a central unit, comprising at least one of a wireless receiver and a wireless transceiver, and a security module connected to the central unit. The implantable medical device may be configured to transfer the data packet from the central unit to the security module, and the security module may be configured to perform at least a portion of at least one of the decryption and the signature verification. The security module may comprise a set of rules for accepting communication from the central unit, and the security module may be configured to verify compliance with the set of rules. According to one embodiment, the wireless receiver or wireless transceiver may be configured to be placed in an off-mode, in which no wireless communication can be received by the wireless transceiver, and the set of rules may comprise a rule stipulating that communication from the central unit is only accepted at the security module when the wireless transceiver is placed in the off-mode. According to one embodiment, the implantable medical device may be configured to decrypt the data packet and/or verify the electronic signature using a private key of the implantable medical device. The private key may be a non-extractable key. The private keymay be provided in the implantable medical device by the manufacturer of the implantable medical device and may be stored as hardware or software in the implantable medical device. According to one embodiment, the implantable medical device is configured to perform a proof of possession operation comprising: transmitting, from the implantable medical device to the external system, a query based on a public key associated with the private key of the external system, receiving, at the implantable medical device, a response based on the possession of the private key in the external system, and verifying that the response based on the possession of the private key matches the query based on a public key. The implantable medical device may be configured to communicate with the external system independently of time. According to one embodiment, the implantable medical device is configured to: verify a first electronic signature made using atleast one of a first key and a second key, and verifying a second electronic signature made using at least one of a first key and a second key.At least one of the first and second keys may be a private key, and the first and second keys may be different, and the first and second keys may comprise at least one common element. According to one embodiment, the implantable medical device is configured to verify a first electronic signature to allow communication from the external system to the implantable medical device, and verify a second electronic signature to allow an instruction received in the communication to alter the control program running on the implantable medical device. According to one embodiment, the first electronic signature is an electronic signature linked to the user of the implantable medical device and the second electronic signature is an electronic signature linked to a healthcare provider. According to one embodiment, only a portion of the private key is needed to at least one of: decrypt the data packet and verify the electronic signature. The implantable medical device trusts any external device holding the private key. According to one embodiment, the implantable medical device is configured to receive the data packet comprising: at least one instruction signed by a private key of the external system, and a public key including information about which root have created the public key. According to one embodiment, the implantable medical device is configured to accept communication from an external system based on at least one password being provided to the implantable medical device. According to one embodiment, the implantable medicaldevice is configured to accept communication from an external system based on two passwords being provided to the implantable medical device. According to one embodiment, the implantable medical device is configured to accept communication from an external system based on one patient password and one healthcare provider passwords being provided to the implantable medical device. A method of providing remote instructions from an external system to an implantable medical device is further provided. The method comprises deriving a checksum, at the external system, from the instructions to be sent to the implantable medical device, electronically signing the instructions and the checksum, at the external system, wherein: the instructions, the checksum and the electronic signature form a data packet, wirelessly sending the data packet to the implantable medical device, verifying the electronic signature, and using the checksum to verify the integrity of the instructions. According to one embodiment, the method further comprises the steps of encrypting the data packet at the external system using a private key of the external system, and decrypting, at the implantable medical device, the data packet using a private key of the implantable medical device. According to one embodiment, the step of verifying the electronic signature comprises comparing the electronic signature with electronic signatures stored in the implantable medical device. According to one embodiment, the step of wirelessly sending the data packet to the implantable medical device comprises sending the data packet from a first external device to a second external device using wired communication and wirelessly sending the data packet from the second external device to the implantable medical device. According to one embodiment, the step of wirelessly sending the data packet to the implantable medical device comprises sending the data packet from a first external device to a second external device and further wirelessly sending the data packet from the second external device to the implantable medical device. The second external device transmits the data packet without changing the data packet and/or without full decryption. According to one embodiment, the step of wirelessly sending the data packet to the implantable medical device comprises: wirelessly sending the data packet from a first external device to a second external device using a first network protocol, and wirelessly sending the data packet from the second external device to the implantable medical device using a second network protocol. According to one embodiment, the step of wirelessly sending the data packet to the implantable medical device comprises: wirelessly sending the data packet from a first external device to a second external device using a first frequency band, and wirelessly sending the data packet from the second external device to the implantable medical device using a second frequency band. According to one embodiment, the step of wirelessly sending the data packet to the implantable medical device comprises: wirelessly sending the data packet from a first external device to a second external device using a first wireless technology, and wirelessly sending the data packet from the second external device to the implantable medical device using a second wireless technology, wherein the first wireless technology has an effective range being one of: 2 times, 4 times, 8 times 20 times, 50 times or 100 times longer than the first wireless technology. According to one embodiment, the implantable medical device comprises a central unit, comprising a wireless transceiver, and a security module connected to the central unit. The step of decrypting, at the implantable medical device, the data packet, comprises transferring the data packet from the central unit to the security module, and performing at least a portion of the decryption in the security module. According to one embodiment, the security module comprises a set of rules for accepting communication from the central unit, and the step of transferring the data packet from the receiving unit of the implant to the security module comprises verifying compliance with the set of rules. According to one embodiment, the wireless transceiver is configured to be placed in an off-mode, in which no wireless communication can be received by the wireless transceiver, and the set of rules comprises a rule stipulating that communication from the central unit is only accepted at the security module when the wireless transceiver is placed in the off-mode. According to one embodiment, the step of electronically signing the instructions at the external system comprises electronically signing the instructions at the external system using a private key of the external system. According to one embodiment, the step of verifying the electronic signature comprises performing a proof of possession operation comprising the steps of: transmitting, form the medical device to the external system, a query based on a public key associatedwith the private of the external system, receiving, at the medical device, a response based on the possession of the private key in the external system, and verifying that the response based on the possession of the private key matches the query based on a public key. According to one embodiment, the step of forming the data packet is performed at a first external device, and the step of electronically signing the instructions comprises electronically signing the instruction using a first private key, and wherein the methodfurther comprises: transmitting the data packet from the first external device to a second external device, verifying, at the second external device, that the transmitter is a trusted transmitter, in response to the verification, electronically signing the data packet using a second private key, and transmitting the data packet from the second external device to the medical implant, and verifying, at the medical implant, the electronic signatures generated using the first and second private keys. The method may further comprise using the checksum to verify the integrity of the instructions. According to one embodiment, the method according to any one of the preceding embodiments is performed without connection to the Internet and/or independently of time. According to one embodiment, the method further comprises the central server being accessed by at least one healthcare professional, and the healthcare professional providing input to the central server for forming the instructions to be sent to the implantable medical device. According to one embodiment, the central server is accessed by at least one patient, such that the patient can provide input to the central server for verifying at least one of: the authenticity of the healthcare professional and the correctness of the instructions. According to one embodiment, the healthcare provider may electronically sign the instructions at the central server and/or the patient may electronically sign the instructions at the central server. According to one embodiment, the method further comprising the steps of: verifying the authenticity of the first and second key at the central server, and electronically signing the instructions using the first and second key. According to one embodiment, the second key is a user key, and the method may comprise the steps of using the second key for at least one of: approving that communication is transmitted to the implantable medical device, and approving that a healthcare provider prepares an instruction to the implantable medical device. According to one embodiment, the approval step can be performed by first or second external device. According to one embodiment, the first key is required to create an instruction to the implantable medical device and the second key is required to transmit the created instruction to the implantable medical device. At least one of the first and second external device may comprise an input button, and the method may further comprise the step of pressing the button for verifying user presence. The input button may be placed on the second external device. According to one embodiment, the method further comprises a verification query operation between at least one of the first and second external devices and at least one of the first and second key devices, the verification query operation comprising: transmitting, from the first or second external devices, a query comprising a computational challenge to at least one of the first and second key device, receiving, at the first or second external devices, a response based on the transmitted computational challenge, and verifying, at the first or second external devices, the received response. The verification query operation may be in the form of a proof of possession operation comprising: receiving a public key of at least one of the first and second key devices, the public key being associated with a private key of the first or second key device, transmitting, from at least one of the first and second external devices, a computational challenge to the first or second key device, based on the public key received from the first or second key device, receiving a response from the first or second key device based on the possession of the private key in the first or second key device, and verifying that the response based on the possession of the private key matches the query based on a public key. A method of providing remote instructions from an external system to an implantable medical device is further provided. The implantable medical device comprises a list of codes and the external system comprises a list of codes. The method comprising encrypting the instructions at the external system using a code from a position on the list of codes, wirelessly sending the encrypted instructions to the implantable medical device, and decrypting, at the implantable medical device, the instructions using a code from a position on the list of codes. According to one embodiment, the method further comprises the steps of: wirelessly sending position information from the external device to the implantable medical device, and using the information at the implantable medical device for selecting the code from the list of codes. According to one embodiment, the step of encrypting, at the external system, the instructions using a code from a position on the list of codes comprises selecting the code on a current position on the list of codes, wherein the method further comprises the step of updating the current position to a new current position after using the code. According to one embodiment, the step of decrypting, at the implantable medical device, the instructions using a code from a position on the list of codes comprises selecting the code on a current position on the list of codes, wherein the method further comprises the step of updating the current position to a new current position after using the code. According to one embodiment, the current position comprises a number and wherein the step of updating the current position comprises updating the number to a sequential number. According to one embodiment, the step of wirelessly sending the encrypted instructions to the implantable medical device comprises sending the encrypted instructions from a first external device to a second external device and further wirelessly sending the encrypted instructions from the second external device to the implantable medical device, and wherein the second external device transmits the encrypted instructions without changing the encrypted instructions and/or without full decryption of the instructions. A communication system for transmission of data to or from an implantable medical device is provided. The communication system comprises an implantable medical implant, a first remote control comprising a first wireless communication unit configured for wireless transmission of data to or from the implantable medical device, the first remote control being operable by a user, and a second remote control comprising a second wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a third communication unit for communicating with a patient display device, the second remote control being inoperable by a user. According to an embodiment, the first remote control comprises an input device for receiving a first user input, and wherein the first remote control is configured to transmit the first user input to the implantable medical device. According to an embodiment, the second remote control is configured to receive second user input from the patient display device and to transmit the second user input to the implantable medical implant. According to an embodiment, the data comprises a control command for the medical implant. According to an embodiment, at least one of the first wireless communication unit and the second wireless communication unit is configured to send or receive data using near-field magnetic induction. According to an embodiment, at least one of the first wireless communication unit and the second wireless communication unit comprises a transmitter coil for modulating a magnetic field for transmitting the data, and wherein the implantable medical implant comprises a receiving coil and an NFMI receiver connected to the receiving coil to receive the data. According to an embodiment, the transmitter coil is configured to modulate a magnetic field, and the NFMI receiver is adapted to measure the magnetic field in the receiving coil. According to an embodiment, at least one of the first wireless communication unit and the second wireless communication unit is configured to wirelessly charge the medical implant using near-field magnetic induction. According to an embodiment, the medical implant comprises a coil for receiving wireless energy for charging the implant via near-field magnetic induction. According to an embodiment, the second and third communication units are configured to transmit and/or receive data using different network protocols. According to an embodiment, wherein the second and third communication units are configured to transmit and/or receive data using different frequency bands. According to an embodiment, at least one of the first remote control, the second remote control and the implantable medical device comprises a Bluetooth transceiver. According to an embodiment, at least one of first remote control, the second remote control and the implantable medical device comprises a UWB transceiver. According to an embodiment, the network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to an embodiment, the second communication unit has a longer effective range than the third communication unit. According to an embodiment, the second remote control is configured to communicate with a consumer electronics device. According to an embodiment, the patient display device comprises the consumer electronics device. According to an embodiment, the first remote control is configured to control functions of the implantable medical device based on user input to the first remote control. According to an embodiment, a method corresponding to the communication system according to the previous aspect is provided. According to an aspect, a method for wireless energy transfer from an external energy source located outside the patient to an internal energy receiver located inside the patient, the internal energy receiver being connected to an implantable medicaldevice for supplying received energy thereto, is provided. The method comprises determining an accumulated amount of received energy over a time period, determining a current change in the received energy, determining a control signal reflecting the accumulated received energy and the change in the received energy, and controlling the energy transfer based on the control signal. According to an embodiment, determining an accumulated amount of received energy is determined by the internal energy receiver. According to an embodiment, determining a current change is performed by the internal energy receiver. According to an embodiment, the internal energy receiver comprises a PID regulator for controlling the energy transfer. According to an embodiment, the PID regulator is implemented in a microcontroller. According to an embodiment, determining a control signal is performed by the internal energy receiver. According to an embodiment, the control signal is transmitted to the external energy source, and wherein the external energy source is configured to adjust the transmitted energy base on the control signal. According to an embodiment, controlling the energy transfer is controlled by the internal energy receiver. According to an embodiment, controlling the energy transfer is performed by the external energy source. According to an embodiment, controlling the energy transfer comprises adjusting the energy transfer efficiency. According to an embodiment, the external device comprises a transmitter coil for modulating a magnetic field for transmitting data or transmitting energy, and wherein the implantable medical implant comprises a receiving coil and an NFMI receiver connected to the receiving coil to receive the data or the energy. According to an embodiment, at least one of the first wireless communication unit and the second wireless communication unit is configured to wirelessly charge the medical implant using near-field magnetic induction. According to an embodiment, the medical implant comprises a coil for receiving wireless energy for charging the implant via near-field magnetic induction. According to an embodiment, the method further comprises receiving energy in pulses according to a pulse pattern, and measuring the received pulse pattern. According to an embodiment, the method further comprises determining that the pulse pattern deviates from a predefined pulse pattern, and controlling the energy transfer based on the determination. According to an embodiment, the method further comprises measuring a temperature in the implantable medical device or in the body of the patient, and controlling the energy transfer in response to the measured temperature. According to an embodiment, the implantable medical device comprises at least one coil connected to a variable impedance, the method further comprising controlling the energy transfer by controlling the variable impedance. According to an embodiment, the implantable medical device comprises at least one coil having a plurality of windings, wherein the plurality of windings each are connected to a respective variable impedance, the method further comprising controlling the energy transfer by controlling the respective variable impedance individually. According to an aspect, an implantable medical device, a first remote control and/or a second remote control configured to perform the method according to the previous aspect are provided. A corresponding method is also provided. A method of teaching a voice-controlled medical implant to recognize a voice command is provided. The method comprises inputting a first audio training phrase to the medical implant, when the medical implant is implanted in the body of the patient and creating a transfer function, the transfer function being based on the first audio training phrase, wherein the transfer function is configured to adjust the amplitude of at least one frequency of audio received at the medical device for enhancing audio received at the medical implant to facilitate detection of voice commands. The method further comprises inputting a second audio training phrase to the medical implant, thesecond audio training phrase comprising the voice command. The voice command comprises an instruction for the control of the medical implant. The method further comprises using the transfer function for generating an enhanced second audio training phrase in the medicalimplant, and associating the enhanced second audio training phrase with the instruction for the control of the medical implant. In an embodiment, adjusting the amplitude comprises at least one of: filtering, cancelling and amplifying the at least one frequency. In an embodiment, at least one of the first and second audio training phrase is a spoken audio training phrase. In an embodiment, the spoken audio training phrase is spoken by the patient the implant is implanted in. In an embodiment, the first audio training phrase comprises the voice command. In an embodiment, the first and second audio training phrases is the same voice command. In an embodiment, the first and second audio training phrases are different. In an embodiment, creating the transfer function comprises amplifying frequencies muffled by the location of the medical implant in the body of the patient. In an embodiment, creating the transfer function comprises filtering or cancelling noise generated by the body. In an embodiment, the medical implant is configured to receive voice commands related to an instruction for control of the medical implant. In an embodiment, the voice command relates to at least one of: performing a function of the medical device; using a sensor to measure a parameter relating to a condition of the patient or a condition of the medial implant; and sending or receiving data from the medical implant. A system corresponding to the preceding aspect is also provided. According to an aspect, a system for wirelessly charging an implantable medical implant, when implanted in a body of a patient, is provided. The system comprises an internal energy receiver comprising a secondary coil, the internal energy receiver being connected to the implantable medical implant and an external energy transmitter comprising a primary coil for wirelessly transmitting energy to the internal energy receiver via the secondary coil, wherein a diameter of the primary coil is larger than a diameter of the secondary coil. According to an embodiment, the system further comprises an internal controller connected to the internal energy receiver, for controlling the amount of energy received by the internal energy receiver. According to an embodiment, the internal energy receiver further comprises a measurement unit for measuring a parameter related to the implantable medical implant or the body of the patient. According to an embodiment, the controller is configured to measure the accumulated energy received by the internal energyreceiver over a period of time and to measure a current change in energy received, and to control the energy received based on the accumulated energy and the current change. According to an embodiment, the controlled comprises a Proportional – Integral – Derivative, PID, regulator for controlling the received energy. According to an embodiment, the internal energy received comprises a variable impedance. According to an embodiment, the internal energy receiver is configured to control the resonant frequency by controlling the variable impedance. According to an embodiment, the controller is configured to vary the variable impedance in response to a measured parameter deviating from a predetermined interval or exceeding a threshold value. According to an embodiment, the parameter relates to the energy received by the coil over a time period. According to an embodiment, the measurement unit is configured to measure a parameter related to a change in energy received by the coil. According to an embodiment, the receiving unit is configured to receive transcutaneously transferred energy in pulses according to a pulse pattern, and wherein the measurement unit is configured to measure a parameter related to the pulse pattern. According to an embodiment, the receiving unit is configured to receive transcutaneously transferred energy in pulses according to a pulse pattern, and wherein the measurement unit is configured to measure a parameter related to the pulse pattern. According to an embodiment, the controller is configured to control the variable impedance in response to the pulse pattern deviating from a predefined pulse pattern. According to an embodiment, the variable impedance comprises a resistor and a capacitor, the variable impedance comprises aresistor and an inductor, the variable impedance comprises an inductor and a capacitor, the variable impedance comprises a digitally tuned capacitor, the variable impedance comprises a digital potentiometer, or the variable impedance comprises a variable inductor. According to an embodiment, the diameter of the primary coil is at least one of more than 0.5 cm, more than 10 cm, more than 15 cm, more than 20 cm, coil is more than 30 cm, or is more than 50 cm. According to an embodiment, the area of the primary coil is more than 0.5 cm2, more than 2 cm2, more than 10 cm2, more than 100 cm2, more than 300 cm2, more than 500 cm2, or more than 800 cm2. According to an embodiment, a method corresponding to the system for wirelessly charging an implant according to the previous aspect is provided. According to an aspect, a system for communication with an implantable medical device, when implanted in a body of a patient, is provided. The system comprises an internal communications unit, connected to or comprised in the implantable medical device, and an external communications unit, wherein the internal communications unit and the external communications unit are configured to communicate using near field magnetic induction, NFMI. According to an embodiment, the internal communication unit comprises an internal NFMI receiver and an internal coil connected to the internal NFMI receiver, the internal NFMI receiver being configured to measure an induced voltage in the internal coil. The external communications unit comprises an external NFMI transmitter and an external coil connected to the external NFMI transmitter, and the external coil and the external NFMI transmitter are configured to modulate a magnetic field for sending data to the implantable medical device via the internal coil. According to an embodiment, the external NFMI transmitter further comprises a capacitor for tuning. According to an embodiment, the internal NFMI receiver comprises a tunable resistor and capacitor tank. According to an embodiment, the internal communication unit comprises an internal NFMI transmitter and an internal coil connected to the internal NFMI transmitter. The external communications unit comprises an external NFMI receiver and an external coil connected to the external NFMI receiver, the external NFMI receiver being configured to measure an induced voltage in the external coil, and the internal coil and the internal NFMI transmitter are configured to modulate a magnetic field for sending data to the external communications unit via the external coil. According to an embodiment, the internal NFMI transmitter further comprises a capacitor for tuning the internal coil and the internal NFMI transmitter. According to an embodiment, the external NFMI receiver comprises a tunable resistor and capacitor tank for tuning the external coil and the external NFMI receiver. According to an embodiment, the implantable medical device comprises an active portion configured to monitor, treat or perform a function of a body of a patient. According to an embodiment, the active portion is not a pacemaker, a hearing aid or a neurostimulation implant.According to an embodiment, the internal communications unit is adapted to be implanted at a tissue depth of at least 8 cm or at least 15 cm. According to an embodiment, the internal communications unit is adapted to be implanted in an abdomen of a patient. According to an embodiment, the external communications unit is configured to communicate with another external device. According to an embodiment, the internal communications unit is configured to encrypt data before transmitting it to the external communications unit. According to an embodiment, the external communications unit is configured to relay the encrypted data to the another external device without decrypting it. According to an aspect, an implantable medical device adapted to receive wirelessly transmitted energy is provided, the implantable medical device comprises an energy consuming part, and a first energy receiving unit, the first energy receiving unit comprising a first coil configured for receiving wirelessly transferred energy, and a first impedance unit electrically connected to the first coil, the receiving unit being configured to transfer the received energy to the energy consuming part. The implantable medical device further comprises a second energy receiving unit, the second energy receiving unit comprising a second coil configured for receivingwirelessly transferred energy and a second impedance unit electrically connected to the second coil, the receiving unit being configured to transfer the received energy to the energy consuming part. The implantable medical device further comprises a measurement unit configured to measure a parameter related to energy transfer, and a controller configured to control the subcutaneously received energy based on the parameter by controlling the first or the second impedance unit. According to an embodiment, the first energy receiving unit has a first resonant frequency based on the inductance of the first coil and the impedance of the first impedance unit, and the second energy receiving unit has a second resonant frequency based on the inductance of the second coil and the impedance of second impedance unit. According to an embodiment, the first receiving unit has a resonant frequency different from the resonant frequency of the second receiving unit. According to an embodiment, the first and second impedance units are connected in parallel to the respective coil. According to an aspect, an implantable medical device adapted to receive wirelessly transmitted energy, the implantable medical device comprises an energy consuming part, and a receiving unit configured for receiving wirelessly transferred energy and transferringthe received energy to the energy consuming part, the receiving unit comprising a first coil portion and a second coil portion, and a first impedance unit and a second impedance unit, wherein the first impedance unit is connected to the first coil portion and the second impedance unit is connected to the second coil portion. The implantable medical device further comprises a measurement unit configured to measure a parameter related to energy transfer, and a controller configured to control the subcutaneously received energy based on the parameter by controlling the first or the second impedance unit. According to an embodiment, the first coil portion and the second coil portion are at least one of: portions of the same coil, or portions or different coils connected in series. According to an embodiment, the first coil portion and the second coil portion have the same inductance, or the first coil portion has a different inductance than the second coil portion. According to an embodiment, the first impedance is connected in parallel to the first coil portion and the second impedance isconnected in parallel to the second coil portion. According to an embodiment, one of the first coil portion and the second coil portion are overlapping the other of the first coilportion and the second coil portion, or the first coil portion and the second coil portion are not overlapping with the other of the first coil portion and the second coil portion. According to an embodiment, the first coil portion and the first impedance unit has a first resonance frequency, and the second coil portion and the second impedance unit has a second resonance frequency. According to an embodiment, the first resonance frequency is different from the second resonance frequency. According to an embodiment, the first or second impedance unit is a capacitor. According to an embodiment, the first impedance unit and the second impedance unit have different impedances. According to an aspect, an implantable medical device adapted to receive wirelessly transmitted energy, the implantable medical device comprises an energy consuming part, and a first receiving unit comprising a first coil configured for receiving wirelessly transferred energy and transferring the received energy to the energy consuming part, and a first impedance electrically connected to the coil. The implantable medical device further comprises a second receiving unit comprising a second coil portion and a third coil portionconfigured for receiving wirelessly transferred energy and transferring the received energy to the energy consuming part, and a second impedance unit and a third impedance unit, wherein the second impedance unit is connected to the second coil portion and the third impedance unit is connected to the third coil portion. The implantable medical device further comprises a measurement unit configured to measure a parameter related to energy transfer, and a controller configured to control the subcutaneously received energy based on the parameter by controlling the first, the second or the third impedance unit. ASPECT_371-Electro_Subcutaneous_Control_Pop-Rivet2_Flange According to one embodiment of the inventive concept, these and other objects are achieved in full, or at least in part, by an implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a fourth cross-sectional area in a fourth plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, third and fourth planes are parallel to each other, the third cross-sectional area is smaller than the second and fourth cross-sectional areas, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, and the first portion is detachably connected to at least one of the connecting portion and the second portion. In some embodiments, the third cross-sectional area is smaller than the first cross-sectional area. In some embodiments, the third cross-sectional area is equal to or larger than the first cross-sectional area. In some embodiments, the connecting portion comprises a flange comprising the fourth cross-sectional area, such that the flange is prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes. In some embodiments, the flange protrudes in a direction parallel to the first, second, third and fourth planes, and perpendicular to a central extension of the connecting portion. In some embodiments, the flange comprises the third surface configured to engage the first tissue surface of the first side of the tissue portion. In some embodiments, the connecting portion comprises at least one protruding element comprising the fourth cross-sectionalarea, such that the at least one protruding element is prevented from travelling through the hole in the tissue portion, such that the second portion and the connecting portion can be held in position by the tissue portion of the patient also when the first portion is disconnected from the connecting portion. In some embodiments, the at least one protruding element protrudes in a direction parallel to the first, second, third and fourth planes, and perpendicular to a central extension of the connecting portion. In some embodiments, the at least one protruding element comprises the third surface configured to engage the first tissue surface of the first side of the tissue portion. In some embodiments, the connecting portion comprises at least two protruding elements comprising the fourth cross-sectional area. In some embodiments, the at least two protruding elements are symmetrically arranged about a central axis of the connecting portion. In some embodiments, the at least two protruding elements are asymmetrically arranged about a central axis of the connecting portion. In some embodiments, at least one of the first, second and third surfaces comprises at least one of ribs, barbs, hooks, a friction enhancing surface treatment, and a friction enhancing material, to facilitate the implantable energized medical device being held in position by the tissue portion. In some embodiments, the connecting portion comprises a hollow portion. In some embodiments, the hollow portion provides a passage between the first and second portions. In some embodiments, the first portion is detachably connected to the connecting portion by at least one of a mechanical connection and a magnetic connection. In some embodiments, the first portion is detachably connected to the connecting portion by at least one of threads and corresponding grooves, a screw, a self-locking element, a twist and lock fitting, and a spring-loaded locking mechanism. In some embodiments, the at least one protruding element has a height in a direction perpendicular to the fourth plane being less than a height of the first portion in said direction. In some embodiments, the at least one protruding element has a height in said direction perpendicular to the fourth plane being less than half of said height of the first portion in said direction. In some embodiments, the at least one protruding element has a height in said direction perpendicular to the fourth plane being less than a quarter of said height of the first portion in said direction. In some embodiments, the at least one protruding element has a height in said direction perpendicular to the fourth plane being less than a tenth of said height of the first portion in said direction. In some embodiments, the at least one protruding element has a diameter in the fourth plane being one of: less than a diameter of the first portion in the first plane, equal to a diameter of the first portion in the first plane, and larger than a diameter of the first portion in the first plane. In some embodiments, the at least one protruding element has a cross-sectional area in the fourth plane being one of: less than a cross-sectional area of the first portion in the first plane, equal to a cross-sectional area of the first portion in the first plane, and larger than a cross-sectional area of the first portion in the first plane. In some embodiments, the at least one protruding element has a height in said direction perpendicular to the fourth plane being less than half of a height of the connecting portion in said direction. In some embodiments, the at least one protruding element has a height in said direction perpendicular to the fourth plane being less than a quarter of said height of the connecting portion in said direction. In some embodiments, the at least one protruding element has a height in said direction perpendicular to the fourth plane being less than a tenth of said height of the connecting portion in said direction. ASPECT_374-Electro_Subcutaneous_Control_Pop-Rivet2_Shoe According to one embodiment of the inventive concept, these and other objects are achieved in full, or at least in part, by an implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectionalarea in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissueportion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, and a connecting interface between the connecting portion and the second portion is excentric with respect to the second portion. In some embodiments, the connecting interface between the connecting portion and the second portion is excentric, with respect to the second portion, in a first direction, but not in a second direction being perpendicular to the first direction. In some embodiments, the connecting interface between the connecting portion and the second portion is excentric, with respect to the second portion, in a first direction and in a second direction being perpendicular to the first direction. In some embodiments, the first direction and second direction are parallel to the second plane. In some embodiments, the second portion has a first end and a second end opposing the first end, wherein the second portion has a length between the first and second end. In some embodiments, the first end and second end are separated in a direction parallel to the second plane. In some embodiments, the second portion is curved along the length. In some embodiments, the second portion is curved in said first direction and said second direction being perpendicular to the first direction. In some embodiments, the first and second ends comprise an elliptical point respectively. In some embodiments, the first and second ends comprise a hemispherical end cap respectively. In some embodiments, the second portion has at least one circular cross-section along the length between the first and second end. In some embodiments, the second portion has at least one oval cross-section along the length between the first and second end. In some embodiments, the second portion has at least one elliptical cross-section along the length between the first and second end. In some embodiments, the second portion has said length in a direction being different to a central extension of the connecting portion. In some embodiments, the second portion has a proximal region, an intermediate region, and a distal region. In some embodiments, the proximal region extends from the first end to an interface between the connecting portion and the second portion, the intermediate region is defined by the connecting interface between the connecting portion and the second portion, and the distal region extends from the interface between the connecting portion and the second portion to the second end. In some embodiments, the proximal region is shorter than the distal region with respect to the length of the second portion. In some embodiments, the proximal region and the intermediate region together are shorter than the distal region with respect to the length of the second portion. In some embodiments, the proximal region and the distal region comprises the second surface configured to engage the second surface of the second side of the tissue portion. In some embodiments, the second portion has a length x and a width y along respective length and width directions being perpendicular to each other and substantially parallel to the second plane, wherein the connecting interface between the connecting portionand the second portion is contained within a region extending from x>0 to x<x/2 and/or y>0 to y<y/2, x and y and 0 being respective end points of the second portion along said length and width directions. In some embodiments, the second portion is tapered from the first end to the second end. In some embodiments, the second portion is tapered from each of the first end and second end towards the intermediate region of the second portion. In some embodiments, the first portion has a maximum dimension being in the range of 10 to 40 mm, such as in the range of 10 to 30 mm, such as in the range of 15 to 25 mm. In some embodiments, the first portion has a diameter being in the range of 10 to 40 mm, such as in the range of 10 to 30 mm, such as in the range of 15 to 25 mm. In some embodiments, the connecting portion has a maximum dimension in the third plane in the range of 2 to 20 mm, such as in the range of 2 to 15 mm, such as in the range of 5 to 10 mm. In some embodiments, the second portion has a maximum dimension being in the range of 30 to 90 mm, such as in the range of 30 to 70 mm, such as in the range of 35 to 60 mm. In some embodiments, the first portion has one or more of a spherical shape, an ellipsoidal shape, a polyhedral shape, an elongated shape, and a flat disk shape. In some embodiments, the connecting portion has one of an oval cross-section, an elongated cross-section, and a circular cross- section, in a plane parallel to the third plane. In some embodiments, the distal region is configured to be directed downwards in a standing patient. In some embodiments, the first portion comprises a proximal region extending from an first end to an interface between the connecting portion and the first portion, an intermediate region defined by an connecting interface between the connecting portion and the first portion, and a distal region extending from the interface between the connecting portion and the first portion to a second end of the first portion. In some embodiments, the first portion has a first height, and the second portion has a second height, both heights being in a direction perpendicular to the first and second planes, wherein the first height is smaller than the second height. In some embodiments, the first height is less than 2/3 of the second height, such as less than 1/2 of the second height, such as less than 1/3 of the second height. In some embodiments, the second end of the second portion comprises connections for connecting to an implant being located in a caudal direction from a location of the implantable energized medical device in the patient. In some embodiments, the first end of the second portion comprises connections for connecting to an implant being located in a cranial direction from a location of the implantable energized medical device in the patient. ASPECT_375-Electro_Subcutaneous_Control_Pop-Rivet2_Cross According to one embodiment of the inventive concept, these and other objects are achieved in full, or at least in part, by an implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sidesof the tissue portion, the connecting portion has a third cross-sectional area in a third plane and is configured to connect the first portion to the second portion, wherein: the first, second and third planes are parallel to each other, the third cross-sectional area is smaller thanthe first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first cross-sectional area has a first cross-sectional distance and a second cross-sectional distance, the first and second cross-sectional distances being perpendicular to each other and the first cross-sectional distance being longer than the second cross-sectional distance, the second cross-sectional area has a first cross- sectional distance and a second cross-sectional distance, the first and second cross-sectional distances being perpendicular to each other and the first cross-sectional distance being longer than the second cross-sectional distance, the first cross-sectional distance of the first cross-sectional area and the first cross-sectional distance of the second cross-sectional area are rotationally displaced in relation to each other with an angle exceeding 45° to facilitate insertion of the second portion through the hole in the tissue portion. In some embodiments, the first cross-sectional distance of the first cross-sectional area and the first cross-sectional distance of the second cross-sectional area are rotationally displaced in relation to each other with an angle exceeding 60° to facilitate insertion of the second portion through the hole in the tissue portion. In some embodiments, the first cross-sectional distance of the first cross-sectional area and the first cross-sectional distance of the second cross-sectional area are substantially perpendicular to each other to facilitate insertion of the second portion through the hole in the tissue portion. In some embodiments, the first cross-sectional distance of the first cross-sectional area and the first cross-sectional distance of the second cross-sectional area are rotationally displaced in relation to each other with an angle exceeding 45° and being less than 135°. In some embodiments, the cross-sectional area of the first portion is elongated. In some embodiments, the cross-sectional area of the second portion is elongated. In some embodiments, the connecting portion is connected eccentrically to the second portion. In some embodiments, the first cross-sectional distance of the second portion is divided into a first, second and third equal length-portions, and wherein the connecting portion is connected to the second portion along the first length-portion of the first cross- sectional distance. In some embodiments, the first cross-sectional area of the first portion is elongated. In some embodiments, the second cross-sectional area of the second portion is elongated. In some embodiments, the first portion comprises a first wireless energy receiver configured to receive energy transmitted wirelessly from an external wireless energy transmitter. In some embodiments, the first portion comprises an internal wireless energy transmitter. In some embodiments, the second portion comprises a second wireless energy receiver. In some embodiments, the first portion comprises a first energy storage unit. In some embodiments, the second portion comprises a second energy storage unit. In some embodiments, at least one of the first and second energy storage unit is a solid-state battery. In some embodiments, the solid-state battery is a thionyl-chloride battery. In some embodiments, the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter, and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. In some embodiments, the first portion comprises a first controller comprising at least one processing unit. In some embodiments, the second portion comprises a second controller comprising at least one processing unit. In some embodiments, at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device. In some embodiments, the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, and the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion. In some embodiments, the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion. In some embodiments, the first wireless energy receiver comprises a first coil and the internal wireless energy transmitter comprises a second coil. In some embodiments, the first portion comprises a combined coil, wherein the combined coil is configured to receive energywirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion. In some embodiments, at least one of the coils are embedded in a ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. ASPECT_373-Electro_Subcutaneous_Control_Pop-Rivet2_Internal-Wireless According to one embodiment of the inventive concept, these and other objects are achieved in full, or at least in part, by an implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sidesof the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion comprises a first wireless energy receiver for receiving energy transmitted wirelessly by an external wireless energy transmitter, and an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion, and the second portion comprises a second wireless energy receiver configured to receive energy transmitted wirelessly by the internal wireless energy transmitter. In some embodiments, the implantable energized medical device further comprises at least one sensor for providing input to at least one of the first and second controller. In some embodiments, the sensor is a sensor configured to sense a physical parameter of the implantable energized medical device. In some embodiments, the sensor is a sensor configured to sense at least one of: a temperature of the implantable energized medical device or of a body engaging portion, a parameter related to the power consumption of the implantable energized medical device or of a body engaging portion, a parameter related to a status of at least one of the first and second energy storage unit, a parameter related to the wireless transfer of energy from a source external to the body of the patient, and a hydraulic pressure. In some embodiments, the sensor is a sensor configured to sense a physiological parameter of the patient. In some embodiments, the sensor is a sensor configured to sense at least one of: a parameter related to the patient swallowing, a local temperature, a systemic temperature, blood saturation, blood oxygenation, blood pressure, a parameter related to an ischemia marker, and pH. In some embodiments, the sensor configured to sense a parameter related to the patient swallowing comprises at least one of: a motility sensor, a sonic sensor, an optical sensor, and a strain sensor. In some embodiments, the sensor configured to sense pH is configured to sense the acidity in the stomach. In some embodiments, the controller is configured to transmit information based on sensor input to a device external to the body of the patient. In some embodiments, the second portion comprises at least a portion of an operation device for operating an implantable body engaging portion. In some embodiments, the second portion comprises at least one electrical motor. In some embodiments, the second portion comprises a transmission configured to reduce the velocity and increase the force of the movement generated by the electrical motor. In some embodiments, the transmission is configured to transfer a week force with a high velocity into a stronger force with lower velocity. In some embodiments, the transmission is configured to transfer a rotating force into a linear force. In some embodiments, the transmission comprises a gear system. In some embodiments, the second portion comprises a magnetic coupling for transferring mechanical work from the electricalmotor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housingenclosing at least the second portion. In some embodiments, the second portion comprises at least one hydraulic pump. In some embodiments, the hydraulic pump comprises a pump comprising at least one compressible hydraulic reservoir. In some embodiments, the implantable energized medical device further comprises a capacitor connected to at least one of the first and second energy storage unit and connected to the electrical motor, wherein the capacitor is configured to: be charged by at least one of the first and second energy storage units, and provide the electrical motor with electrical power. In some embodiments, at least one of the first and second portion comprises a sensation generator adapted to generate a sensation detectable by a sense of the patient. In some embodiments, the second portion comprises a force transferring element configured to mechanically transfer force from the second portion to an implanted body engaging portion. In some embodiments, the second portion comprises a force transferring element configured to hydraulically transfer force from the second portion to an implanted body engaging portion. In some embodiments, the second portion comprises at least one lead for transferring electrical energy and/or information from the second portion to an implanted body engaging portion. In some embodiments, the first portion comprises an injection port for injecting fluid into the first portion. In some embodiments, the connecting portion comprises a conduit for transferring a fluid from the first portion to the second portion. In some embodiments, the conduit is arranged to extend through the hollow portion of the connecting portion. In some embodiments, the second portion comprises a first and a second chamber separated from each other, wherein the first chamber comprises a first liquid and the second chamber comprises a second liquid, and wherein the second liquid is a hydraulic liquid configured to transfer force to an implantable element configured to exert force on the body portion of the patient. In some embodiments, a wall portion of the first chamber is resilient to allow an expansion of the first chamber. In some embodiments, the second portion comprises a first hydraulic system in fluid connection with a first hydraulically operable implantable element configured to exert force on the body portion of the patient, and a second hydraulic system in fluid connection with a second hydraulically operable implantable element configured to exert force on the body portion of the patient, wherein the first and second hydraulically operable implantable elements are adjustable independently from each other. In some embodiments, the first hydraulic system comprises a first hydraulic pump and the second hydraulic systems comprises a second hydraulic pump. In some embodiments, each of the first and second hydraulic systems comprises a reservoir for holding hydraulic fluid. In some embodiments, the implantable energized medical further comprises a first pressure sensor configured to sense a pressure in the first hydraulic system, and a second pressure sensor configured to sense a pressure in the second hydraulic system. In some embodiments, the first surface is configured to engage the first tissue surface of the first side of the tissue portion. In some embodiments, the first, second and third planes are parallel to a major extension plane of the tissue. ASPECT_376-Electro_Subcutaneous_Control_Pop-Rivet2_Ceramic-Coils According to one embodiment of the inventive concept, these and other objects are achieved in full, or at least in part, by an implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectionalarea in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, at least one of the first portion and the second portion comprises at least one coil embedded in a ceramic material, the at least one coil being configured for at least one of: receiving energy transmitted wirelessly, transmitting energy wirelessly, receiving wireless communication, and transmitting wireless communication. In some embodiments, the first portion comprises a first wireless energy receiver configured to receive energy transmitted wirelessly from an external wireless energy transmitter. In some embodiments, the first portion comprises a first wireless communication receiver. In some embodiments, the first portion comprises a coil embedded in a ceramic material, hereinafter referred to as a first coil. In some embodiments, the first wireless energy receiver comprises the first coil. In some embodiments, the first wireless communication receiver comprises the first coil. In some embodiments, the first portion comprises a distal end and a proximal end with respect to the connecting portion, along a direction perpendicular to the first plane. In some embodiments, the first coil is arranged at the distal end of the first portion. In some embodiments, the first portion comprises an internal wireless energy transmitter. In some embodiments, the first portion comprises a first wireless communication transmitter. In some embodiments, the first portion comprises a coil embedded in a ceramic material, hereinafter referred to as a second coil. In some embodiments, the internal wireless energy transmitter comprises the second coil. In some embodiments, the first wireless communication transmitter comprises the second coil. In some embodiments, the second coil is arranged at the proximal end of the first portion. In some embodiments, the first wireless energy receiver and the internal wireless energy transmitter comprises a single coil embedded in a ceramic material. In some embodiments, the first wireless communication receiver and the first wireless communication transmitter comprises a single coil embedded in a ceramic material. In some embodiments, the first wireless energy receiver, the internal wireless energy transmitter, the first wireless communication receiver, and the internal wireless communication transmitter comprises a single coil embedded in a ceramic material. In some embodiments, the second portion comprises a second wireless energy receiver. In some embodiments, the second portion comprises a coil embedded in a ceramic material, hereinafter referred to as a third coil, wherein the second wireless energy receiver comprises the third coil. In some embodiments, the second portion comprises a distal end and a proximal end with respect to the connecting portion, along a direction perpendicular to the first plane. In some embodiments, the third coil is arranged at the proximal end of the second portion. In some embodiments, the first portion comprises a first energy storage unit. In some embodiments, the second portion comprises a second energy storage unit. In some embodiments, the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter, and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the secondwireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. In some embodiments, the first energy storage unit is configured to store less energy than the second energy storage unit, and configured to be charged faster than the second energy storage unit. In some embodiments, the first energy storage unit has lower energy density than the second energy storage unit. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the housing made from a ceramic material comprises the at least one coil embedded in the ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises the at least one coil embedded in the ceramic material. In some embodiments, the first, second and third planes are parallel to a major extension plane of the tissue. In some embodiments, the connecting portion further comprises a fourt cross-sectional area in a fourth plane, wherein the fourtplane is parallel to the first, second and third planes, and wherein the third cross-sectional area is smaller than the fourth cross-sectional area. In some embodiments, the connecting portion comprises a protruding element comprising the fourth cross-sectional area. In some embodiments, the fourth plane is parallel to a major extension plane of the tissue. In some embodiments, a connecting interface between the connecting portion and the second portion is excentric with respect to the second portion. According to an embodiment of the inventive concept, an implantable device for exerting a force on a body portion of a patient is provided, wherein the implantable device comprises: an implantable energized medical device and an implantable element configured to exert a force on a body portion of the patient. In some embodiments, the implantable element configured to exert a force on a body portion of the patient is an implantable hydraulic constriction device. In some embodiments, the implantable hydraulic constriction device is configured for constricting a luminary organ of the patient. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting an intestine of the patient. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device forconstricting a colon or rectum of the patient. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting the intestine at a region of a stoma of the patient. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting a blood vessel of the patient. In some embodiments, the implantable hydraulic constriction device for constricting a blood vessel of the patient is configured to constrict the venous blood flow leading from an erectile tissue for promoting the engorgement of the erectile tissue. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device forconstricting a vas deference of the patient. In some embodiments, the implantable element configured to exert a force on a body portion of the patient is an implantable element for actively emptying the urinary bladder of the patient. In some embodiments, the implantable element for actively emptying the urinary bladder of the patient is configured to empty the bladder of the patient by compressing the urinary bladder from the outside thereof. In some embodiments, the implantable element configured to exert a force on a body portion of the patient is an implantable element for actively stretching a stomach wall of the patient to create a feeling of satiety. ASPECT_378-Electro_Subcutaneous_Control_Pop-Rivet2_Outside-Peritoneum According to one embodiment of the inventive concept, these and other objects are achieved in full, or at least in part, by a method of implanting an implantable energized medical device, the method comprising: placing a second portion of an implantable energized medical device between a peritoneum and a layer of muscular tissue of the abdominal wall, placing a first portion of the implantable energized medical device between the skin of the patient and a layer of muscular tissue of the abdominal wall, wherein the first and second portions are configured to be connected by a connecting portion extending through at least one layer of muscular tissue of the abdominal wall, placing a body engaging portion of the implantable energized medical device in connection with a tissue or an organ of the patient which is to be affected by the implantable energized medical device, and placing a transferring member, configured to transfer at least one of energy and force from the second portion to the body engaging portion, at least partially between a peritoneum and a layer of musculartissue of the abdominal wall, such that at least 1/3 of the length of the transferring member is placed on the outside of the peritoneum. In some embodiments, the transferring member is configured to transfer mechanical force from the second portion to the body engaging portion. In some embodiments, the transferring member is configured to transfer hydraulic force from the second portion to the body engaging portion. In some embodiments, the transferring member is configured to transfer electrical energy force from the second portion to the body engaging portion. In some embodiments, the transferring member is configured to transfer data between the second portion and the body engaging portion. In some embodiments, the step of placing the transferring member comprises placing the transferring member at least partially between the peritoneum and the layer of muscular tissue of the abdominal wall, such that at least 1/2 of the length of the transferring member is placed on the outside of the peritoneum of the patient. In some embodiments, the step of placing the transferring member comprises placing the transferring member at least partially between the peritoneum and the layer of muscular tissue of the abdominal wall, such that at least 2/3 of the length of the transferring member is placed on the outside of the peritoneum of the patient. In some embodiments, the step of placing the transferring member comprises placing the transferring member entirely outside of the peritoneum of the patient. In some embodiments, the step of placing the transferring member comprises placing the transferring member such that it extends from the second portion to an area between the rib cage and the peritoneum of the patient, outside of the peritoneum. In some embodiments, the step of placing the transferring member comprises placing the transferring member such that it extends from the second portion to an area between the stomach and the thoracic diaphragm of the patient. In some embodiments, the step of placing the transferring member comprises placing the transferring member such that it extends from the second portion to the stomach of the patient. In some embodiments, the step of placing the transferring member comprises placing the transferring member such that it extends from the second portion to the esophagus of the patient. In some embodiments, the step of placing the transferring member comprises placing the transferring member such that it extends from the second portion to the retroperitoneal space. In some embodiments, the step of placing the transferring member comprises placing the transferring member such that it extends from the second portion to an area of the kidneys. In some embodiments, the step of placing the transferring member comprises placing the transferring member such that it extends from the second portion to the renal arteries. In some embodiments, the step of placing the transferring member comprises placing the transferring member such that it extends from the second portion to the subperitoneal space, outside of the peritoneum. In some embodiments, the step of placing the transferring member comprises placing the transferring member such that it extends from the second portion to the urinary bladder, outside of the peritoneum. In some embodiments, the step of placing the transferring member comprises placing the transferring member such that it extends from the second portion to the urethra, outside of the peritoneum. In some embodiments, the step of placing the second portion of the implantable energized medical device between the peritoneum and the layer of muscular tissue of the abdominal wall comprises placing the second portion between a first and second layer of muscular tissue of the abdominal wall. In some embodiments, the step of placing the second portion comprises placing a second portion comprising an electrical motor. In some embodiments, the step of placing the second portion comprises placing a second portion comprising a hydraulic pump. In some embodiments, the step of placing the second portion comprises placing a second portion comprising an energy storage unit. In some embodiments, the step of placing the second portion comprises placing a second portion comprising a receiver for receiving at least one of: energy and communication, wirelessly. In some embodiments, the step of placing the first portion comprises placing a first portion comprising a transmitter for transmitting at least one of: energy and communication, wirelessly. In some embodiments, the step of placing the second portion comprises placing a second portion comprising a controller involved in the control of the powered medical device. In some embodiments, the second portion is elongated and has a length axis extending substantially in the direction of the elongation of the second portion, and wherein the step of placing the second portion comprises placing the second portion such that the length axis is substantially parallel with the cranial-caudal axis of the patient. In some embodiments, the second portion is elongated and has a length axis extending substantially in the direction of the elongation of the second portion, and wherein the step of placing the second portion comprises placing the second portion such that the length axis is substantially perpendicular with the cranial-caudal axis of the patient. In some embodiments, the second portion is elongated and has a length axis extending substantially in the direction of the elongation of the second portion, and wherein the step of placing the second portion comprises entering a hole in a layer of muscular tissueof the stomach wall in the direction of the length axis of the second portion and pivoting or angling the second portion after the hole has been entered. In some embodiments, the step of placing the first portion of the implantable energized medical device between the skin of the patient and a layer of muscular tissue of the abdominal wall comprises placing the first portion in the subcutaneous tissue. In some embodiments, the step of placing the first portion of the implantable energized medical device between the skin of the patient and a layer of muscular tissue of the abdominal wall comprises placing the first portion between a first and second layer of muscular tissue of the abdominal wall. In some embodiments, the step of placing the first portion comprises placing a first portion comprising an energy storage unit. In some embodiments, the step of placing the first portion comprises placing a first portion comprising a receiver for receiving at least one of: energy and communication, wirelessly. In some embodiments, the step of placing the first portion comprises placing a first portion comprising a transmitter for transmitting at least one of: energy and communication, wirelessly. In some embodiments, the step of placing the first portion comprises placing a first portion comprising a controller involved in the control of the powered medical device. In some embodiments, the first portion is elongated and has a length axis extending substantially in the direction of the elongation of the first portion, and wherein the step of placing the first portion comprises placing the first portion such that the length axis is substantially parallel with the cranial-caudal axis of the patient. In some embodiments, the first portion is elongated and has a length axis extending substantially in the direction of the elongation of the first portion, and wherein the step of placing the first portion comprises placing the first portion such that the length axis is substantially perpendicular with the cranial-caudal axis of the patient. In some embodiments, the first portion is elongated and has a first portion length axis extending substantially in the direction of the elongation of the first portion, and the second portion is elongated and has a second portion length axis extending substantially in the direction of the elongation of the second portion, and wherein the step of placing the first and second portions comprises placing the first and second portions such that the first portion length axis and the second portion length axis are placed at an angle in relation to each other exceeding 30°. In some embodiments, the step of placing the first and second portions comprises placing the first and second portions such that the first portion length axis and the second portion length axis are placed at an angle in relation to each other exceeding 45°. In some embodiments, the method further comprises the step of placing the connecting portion through at least one layer of muscular tissue of the abdominal wall. In some embodiments, the first portion, the second portion and the connecting portion are portions of a single unit. In some embodiments, the method further comprises the step of connecting the first portion to the connecting portion, in situ. In some embodiments, the method further comprises the step of connecting the second portion to the connecting portion, in situ. In some embodiments, the method further comprises the step of connecting the transferring member to the first portion. In some embodiments, the method further comprises the step of connecting the transferring member to the body engaging portion. In some embodiments, the body engaging portion comprises a medical device for stretching the stomach wall such that a sensation of satiety is created. In some embodiments, the body engaging portion comprises a constriction device configured to constrict a luminary organ of a patient. In some embodiments, the body engaging portion comprises an implantable constriction device. In some embodiments, the implantable constriction device comprises an implantable constriction device for constricting a luminary organ of the patient. In some embodiments, the implantable constriction device comprises an implantable constriction device for constricting an intestine of the patient. In some embodiments, the implantable constriction device comprises an implantable constriction device for constricting a colon or rectum of the patient. In some embodiments, the implantable constriction device comprises an implantable constriction device for constricting the intestine at a region of a stoma of the patient. In some embodiments, the implantable constriction device comprises an implantable constriction device for constricting a blood vessel of the patient. In some embodiments, the implantable constriction device for constricting a blood vessel of the patient is configured to constrict the venous blood flow leading from an erectile tissue for promoting the engorgement of the erectile tissue. In some embodiments, the implantable constriction device for constricting a blood vessel of the patient is configured to constrict the blood flow in the renal artery to affect the patients systemic blood pressure. In some embodiments, the implantable constriction device comprises an implantable constriction device for constricting a vas deference of the patient. In some embodiments, the body engaging portion comprises an implantable element for actively emptying the urinary bladder of the patient. In some embodiments, the implantable element for actively emptying the urinary bladder of the patient is configured to empty the bladder of the patient by compressing the urinary bladder from the outside thereof. In some embodiments, the body engaging comprises an element for electrically stimulating a tissue portion of a patient. ASPECT_372-Electro_Subcutaneous_Control_Pop-Rivet2_Kit According to one embodiment of the inventive concept, these and other objects are achieved in full, or at least in part, by a kit for assembling an implantable energized medical device configured to be held in position by a tissue portion of a patient, the kit comprising: a group of one or more first portions, a group of one or more second portions, a group of one or more connecting portions, wherein at least one of said groups comprises at least two different types of said respective portions; wherein the medical device is a modular device and, when assembled, comprises a selection, from said groups, of one first portion, one second portion, and one connecting portion, wherein: the first portion is configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, the second portion is configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and the connecting portion is configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, and the third cross- sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes. In general, any of the embodiments of the implantable energized medical device disclosed herein may form part of such kit, and any features of such embodiments may be combined to form part of such kit. In some embodiments, the group of one or more first portions comprises a first portion comprising a first energy storage unit. In some embodiments, the group of one or more first portions comprises a first portion comprising a first wireless energy receiver unit for receiving energy transmitted wirelessly by an external wireless energy transmitter. In some embodiments, the first energy storage unit is connected to the first wireless energy receiver, wherein the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter and store the received energy in the first energy storage unit. In some embodiments, the first wireless energy receiver is configured to be physically connected to a second energy storage unit in the second portion. In some embodiments, the group of one or more first portions comprises a first portion comprising an internal wireless energy transmitter. In some embodiments, the group of one or more second portions comprises a second portion comprising a second wirelessenergy receiver configured to receive energy transmitted wirelessly by the internal wireless energy transmitter. In some embodiments, the internal wireless energy transmitter is configured to transmit energy wirelessly to the second wireless energy receiver. In some embodiments, the group of one or more second portions comprises a second portion comprising a second energy storage unit connected to the second wireless energy receiver. In some embodiments, the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. In some embodiments, the group of one or more first portions comprises a first portion being formed as one integral unit with a connecting portion. In some embodiments, the group of one or more second portions comprises a second portion being formed as one integral unit with a connecting portion. In some embodiments, one of the group of one or more first, second or connecting portions comprises a first portion, second portion and connecting portion being formed as one integral unit. In some embodiments, the group of one or more first portions comprises a first portion having a first height along a direction being perpendicular to the first plane, and a first portion having a second height along said direction being perpendicular to the first plane, wherein the second height is larger than the first height. In some embodiments, the group of one or more first portions comprises a first portion having a first width and/or length along a direction being parallel to the first plane, and a first portion having a second width and/or length along said direction being parallel to thefirst plane, wherein the second width and/or length is larger than the first width and/or length. In some embodiments, the group of one or more second portions comprises a second portion having a first height along adirection being perpendicular to the second plane, and a second portion having a second height along said direction being perpendicular to the second plane, wherein the second height is larger than the first height. In some embodiments, the group of one or more second portions comprises a second portion having a first width and/or length along a direction being parallel to the second plane, and a second portion having a second width and/or length along said direction being parallel to the second plane, wherein the second width and/or length is larger than the first width and/or length.In some embodiments, the group of one or more connecting portions comprises a connecting portion having a first height along a direction being perpendicular to the third plane, and a connecting portion having a second height along said direction being perpendicular to the third plane, wherein the second height is larger than the first height. In some embodiments, the group of one or more connecting portions comprises a connecting portion having a first width and/or length along a direction being parallel to the third plane, and a connecting portion having a second width and/or length along said direction being parallel to the third plane, wherein the second width and/or length is larger than the first width and/or length. In some embodiments, the group of one or more first portions comprises a first portion comprising an injection port for injecting fluid into the first portion. In some embodiments, the group of one or more connecting portions comprises a connecting portion comprising a hydraulic fluidconduit for hydraulically connecting the first portion to the second portion. In some embodiments, the group of one or more first portions comprises a first portion comprising a first controller comprising at least one processing unit. In some embodiments, the group of one or more second portions comprises a second portion comprising a second controller comprising at least one processing unit. In some embodiments, at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device. In some embodiments, the first controller is connected to a first wireless communication receiver in the first portion forreceiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion. In some embodiments, the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion. In some embodiments, the first wireless energy receiver comprises a first coil and the internal wireless energy transmitter comprises a second coil. In some embodiments, the group of first portions comprises a first portion comprising a combined coil, wherein the combined coil is configured to receive wireless energy wirelessly from an external wireless energy transmitter, and transmit wireless energy wirelessly to the second wireless receiver of the second portion. In some embodiments, at least one of the coils are embedded in a ceramic material. In some embodiments, the group of one or more first portions comprises a first portion comprising a push button and/or acapacitive button for controlling a function of the implantable energized medical device. The term “body tissue” referred to in the present disclosure may be one or several body tissue groups or layers in a patient, such as muscle tissue, connective tissue, bone, etc. An external device configured for communication with an implantable medical device, when implanted in a patient, is provided. The external device comprises at least one first wireless transceiver configured for communication with the implantable medical device using a first network protocol, for determining a distance between the external device and the implantable medical device, and at least one second wireless transceiver configured for communication with the implantable medical device using a second network protocol, for transferring data between the external device and the implantable medical device. According to one embodiment, the first wireless transceiver comprises an UWB transceiver. According to one embodiment, the first wireless transceiver is configured for transcutaneous energy transfer for at least one of powering an energy consuming component of the implantable medical device and charging an implantable energy storage unit. According to one embodiment, the second network protocol is a standard network protocol. The standard network protocol may be one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, the second wireless transceiver comprises a Bluetooth transceiver. According to one embodiment, the external device is further configured to communicate with a second external device using said at least one wireless transceiver. According to one embodiment, the external device is configured for determining a distance between the external device and the implantable medical device by determining the RSSI. According to one embodiment, a communication range of the first network protocol is less than a communication range of the second network protocol. According to one embodiment, a frequency band of the first network protocol differs from a frequency band of the second network protocol. According to one embodiment, the external device is configured to authenticate the implantable medical device if the determined distance between the external device and the implantable medical device is less than a predetermined threshold value. According to one embodiment, the external device is configured to allow the transfer of data between the external device and the implantable medical device after the implantable medical device has been authenticated. According to one embodiment, the external device is one from the list of: a wearable external device, and a handset. An implantable medical device configured for communication with an external device is provided. The implantable medical device comprises at least one first wireless transceiver configured for communication with the external device using a first network protocol, for determining a distance between the external device and the implantable medical device, and at least one second wireless transceiver configured for communication with the external device using a second network protocol, for transferring data between the external device and the implantable medical device. According to one embodiment, the first wireless transceiver comprises an UWB transceiver. According to one embodiment, the first wireless transceiver is configured for transcutaneous energy transfer for at least one of: powering an energy consuming component of the implantable medical device, and charging an implantable energy storage unit. According to one embodiment, the second network protocol is a standard network protocol, such as selected from the list of Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, the second wireless transceiver comprises a Bluetooth transceiver. According to one embodiment, the implantable medical device is further configured to communicate with a second external device using said at least one wireless transceiver. According to one embodiment, the implantable medical device is configured for determining a distance between the external device and the implantable medical device by determining the RSSI. According to one embodiment, a communication range of the first network protocol is less than a communication range of the second network protocol. According to one embodiment, a frequency band of the first network protocol differs from a frequency band of the second network protocol. According to one embodiment, the implantable medical device is configured to authenticate the external device if the determined distance between the external device and the implantable medical device is less than a predetermined threshold value. According to one embodiment, the implantable medical device is configured to allow the transfer of data between the implantable medical device and the external device after the external device has been authenticated. According to one embodiment, the implantable medical device comprises at least one of: an external heart compression device, an apparatus assisting the pump function of a heart of the patient, an apparatus assisting the pump function comprising a turbine bump placed within a patient’s blood vessel for assisting the pump function of the heart, an operable artificial heart valve, an operable artificial heart valve for increasing the blood flow to the coronary arteries, an implantable drug delivery device, an implantable drug delivery device for injecting directly into a blood vessel and change the position of the injection site, all from within the patient’s body, an implantable drug delivery device for injecting potency enhancing drugs into an erectile tissue of the patient, a hydraulic, mechanic, and/or electric constriction implant, an operable volume filling device, an operable gastric band, an operable implant for stretching the stomach wall of the patient for creating satiety, an implant configured to sense the frequency of the patient ingesting food, an operable cosmetic implant, an operable cosmetic implant for adjust the shape and/or size in the breast region of a patient, an implant controlling medical device for the emptying of a urinary bladder, an implant hindering urinary leakage, an implant hindering anal incontinence, an implant controlling the emptying of fecal matter, an implant monitoring an aneurysm, an implant for hindering the expansion of an aneurysm, an implant lubricating a joint, an implant for affecting the blood flow to an erectile tissue of the patient, an implant for simulating the engorgement of an erectile tissue, an implant with a reservoir for holding bodily fluids, an implant storing and/or emptying a bodily reservoir or a surgically created reservoir, an implant communicating with a database outside the body, an implant able to be programmed from outside the body, an implant able to be programmed from outside the body with a wireless signal, an implant treating impotence, an implant controlling the flow of eggs in the uterine tube, an implant controlling the flow of sperms in the uterine tube, an implant controlling the flow of sperms in the vas deferens, an implant for hindering the transportation of the sperm in the vas deferens, an implant treating osteoarthritis, an implant performing a test of parameters inside the body, an implant controlling specific treatment parameters from inside the body, an implant controlling bodily parameters from inside the body, an implant controlling the blood pressure, an implant controlling the blood pressure by affecting the dilatation of the renal artery, an implant controlling a drug treatment parameter, an implant controlling a parameter in the blood, an implant for adjusting or replacing any bone part of a body of the patient, an implant replacing an organ of the patient or part of an organ of the patient or the function thereof, a vascular treatment device, an implant adapted to move fluid inside the body of the patient, an implant configured to sense a parameter related to the patient swallowing, an implant configured to exercise a muscle with electrical or mechanical stimulation, an implant configured for emptying an intestine portion on command, an operable implant configured to be invaginated in the stomach of the patient to reduce the volume of the stomach substantially more than the volume of the device, an implant configured for emptying the urinary bladder from within the patient’s body by compressing the bladder, an implant configured for draining fluid from within the patient’s body, an implant configured for the active lubrication of a joint with an added lubrication fluid, an implant configured for removing clots and particles from the patient’s blood stream, an implant configured for elongating or straightening a bone in the patient, to reduce scoliosis, a device to stimulate the brain for a several position to a focused point, an artificial stomach replacing the function of the natural stomach, an implant configured for adjusting the position of a female’s urinary tract or bladder neck, an implant configured for stimulating the ampulla vas deference and creating temporary constriction. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new private key device, wherein the HCP or HCP admin have such master private key device adapted to able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solidfood or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A patient external device configured for communication with an implantable medical device, when implanted in a patient, isprovided. The patient external device comprises a wireless communication unit configured for wireless transmission of control commands to the implantable medical device and configured for wireless communication with a patient display device, and a computing unit configured for running a control software for creating the control commands for the operation of the implantable medical device. The computing unit is configured to transmit a control interface as a remote display portal to a patient display device configured to display the control interface to a user, receive user input from the patient display device, and transform the user input into the control commands for wireless transmission to the implantable medical device. According to one embodiment, the wireless communication unit comprises a wireless transceiver for wireless transmission of control commands to the implantable medical device, and wireless transmission of the control interface as the remote display portal to the patient display device. According to one embodiment, the wireless communication unit comprises a first wireless transceiver for wireless transmission of control commands to the implantable medical device, and a second wireless transceiver for wireless transmission of the control interface to the patient display device. According to one embodiment, the wireless communication unit is configured for wireless communication with the patient display device using a standard network protocol. According to one embodiment, the wireless communication unit is configured for wireless communication with the implantable medical device using a proprietary network protocol. According to one embodiment, the wireless communication unit comprises a Bluetooth transceiver. According to one embodiment, at least one of the first and second wireless transceiver comprises a Bluetooth transceiver. According to one embodiment, the wireless communication unit comprises a UWB transceiver. According to one embodiment, at least one of the first and second wireless transceiver comprises a UWB transceiver. According to one embodiment, the wireless communication unit comprises at least one first wireless transceiver configured for communication with the implantable medical device using a first network protocol, for determining a distance between the patient externaldevice and the implantable medical device, and at least one second wireless transceiver configured for communication with the implantable medical device using a second network protocol, for transferring data between the patient external device and the implantable medical device. According to one embodiment, the first wireless transceiver is configured for transcutaneous energy transfer for at least one of: powering an energy consuming component of the implantable medical device and charging an implantable energy storage unit. According to one embodiment, the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, a communication range of the first wireless transceiver is less than a communication range of the second wireless transceiver. According to one embodiment, at least one of: the patient external device is configured to authenticate the implantable medical device if a distance between the patient external device and the implantable medical device is less than a predetermined threshold value, the patient external device is configured to be authenticated by the implantable medical device if a distance between the patient external device and the implantable medical device is less than a predetermined threshold value, the patient external device is configured to authenticate the patient display device if a distance between the patient external device and the patient display device is less than a predetermined threshold value, and the patient external device is configured to be authenticated by the implantable medical device if a distance between the patient external device and the patient display device is less than a predetermined threshold value. According to one embodiment, the patient external device is configured to allow the transfer of data between at least one of: the patient external device and the implantable medical device, and the patient external device and the patient display device, on the basis of the authentication. According to one embodiment, the computing unit is configured to encrypt at least one of the control interface and the control commands. According to one embodiment, the implantable medical device comprises at least one of: an external heart compression device, an apparatus assisting the pump function of a heart of the patient, an apparatus assisting the pump function comprising a turbine bump placed within a patient’s blood vessel for assisting the pump function of the heart, an operable artificial heart valve, an operable artificial heart valve for increasing the blood flow to the coronary arteries. an implantable drug delivery device, an implantable drug delivery device for injecting directly into a blood vessel and change the position of the injection site, all from within the patient’s body, an implantable drug delivery device for injecting potency enhancing drugs into an erectile tissue of the patient, a hydraulic, mechanic, and/or electric constriction implant, an operable volume filling device, an operable gastric band, an operable implant for stretching the stomach wall of the patient for creating satiety, an implant configured to sense the frequency of the patient ingesting food, an operable cosmetic implant, an operable cosmetic implant for adjust the shape and/or size in the breast region of a patient, an implant controlling medical device for the emptying of a urinary bladder, an implant hindering urinary leakage, an implant hindering anal incontinence, an implant controlling the emptying of fecal matter, an implant monitoring an aneurysm, an implant for hindering the expansion of an aneurysm, an implant lubricating a joint, an implant for affecting the blood flow to an erectile tissue of the patient, an implant for simulating the engorgement of an erectile tissue, an implant with a reservoir for holding bodily fluids, an implant storing and/or emptying a bodily reservoir or a surgically created reservoir, an implant communicating with a database outside the body, an implant able to be programmed from outside the body, an implant able to be programmed from outside the body with a wireless signal, an implant treating impotence, an implant controlling the flow of eggs in the uterine tube, an implant controlling the flow of sperms in the uterine tube, an implant controlling the flow of sperms in the vas deferens, an implant for hindering the transportation of the sperm in the vas deferens, an implant treating osteoarthritis, an implant performing a test of parameters inside the body, an implant controlling specific treatment parameters from inside the body, an implant controlling bodily parameters from inside the body, an implant controlling the blood pressure, an implant controlling the blood pressure by affecting the dilatation of the renal artery, an implant controlling a drug treatment parameter, an implant controlling a parameter in the blood, an implant for adjusting or replacing any bone part of a body of the patient, an implant replacing an organ of the patient or part of an organ of the patient or the function thereof, a vascular treatment device, an implant adapted to move fluid inside the body of the patient, an implant configured to sense a parameter related to the patient swallowing, an implant configured to exercise a muscle with electrical or mechanical stimulation, an implant configured for emptying an intestine portion on command, an operable implant configured to be invaginated in the stomach of the patient to reduce the volume of the stomach substantially more than the volume of the device, an implant configured for emptying the urinary bladder from within the patient’s body by compressing the bladder, an implant configured for draining fluid from within the patient’s body, an implant configured for the active lubrication of a joint with an added lubrication fluid, an implant configured for removing clots and particles from the patient’s blood stream, an implant configured for elongating or straightening a bone in the patient, to reduce scoliosis, a device to stimulate the brain for a several position to a focused point, an artificial stomach replacing the function of the natural stomach, an implant configured for adjusting the position of a female’s urinary tract or bladder neck, an implant configured for stimulating the ampulla vas deference and creating temporary constriction. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new private key device, wherein the HCP or HCP admin have such master private key device adapted to able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solidfood or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A patient display device for communication with a patient remote external device for communication with an implantable medical device is provided. The patient display device comprises a wireless communication unit configured for wirelessly receiving an implant control interface as a remote display portal from the patient remote external device and configured for wirelessly transmitting implant control user input to the patient remote external device, a display for displaying the received implant control interface, and an input device for receiving implant control input from the user. According to one embodiment, the patient display device further comprises an auxiliary wireless communication unit. The auxiliary wireless communication unit is configured to be disabled to enable at least one of: wirelessly receiving the implant control interface as the remote display portal from the patient remote external device, and wirelessly transmitting implant control user input to the patient remote external device. According to one embodiment, the wireless communication unit is configured for wireless communication with the patient remote external device using a standard network protocol. The standard network protocol may be one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, the wireless communication unit is configured for wireless communication with the patient remote external device using a proprietary network protocol. According to one embodiment, the wireless communication unit comprises a Bluetooth transceiver. According to one embodiment, the wireless communication unit comprises a UWB transceiver. According to one embodiment, a communication range of the wireless communication unit is less than a communication range of the auxiliary wireless communication unit. According to one embodiment, the patient display device is configured to authenticate the patient remote external device if a distance between the patient display device and the patient remote external device is less than a predetermined threshold value, or to be authenticated by the patient remote external device if a distance between the patient display device and the patient remote external device is less than a predetermined threshold value. According to one embodiment, the patient display device is configured to allow the transfer of data between the patient display device and the patient remote external device on the basis of the authentication. According to one embodiment, the patient display device is a wearable external device or a handset. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new private key device, wherein the HCP or HCP admin have such master private key device adapted to able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A communication system for enabling communication between a patient display device and an implantable medical device, when implanted, is provided. The communication system comprises: a patient display device, a server, and a patient remote external device. The patient display device comprises a wireless communication unit configured for wirelessly receiving an implant control interface as a remote display portal being provided by the patient remote external device. The wireless communication unit is further configured for wirelessly transmitting implant control user input to the server, destined for the patient remote external device. The system further comprises a display for displaying the received remote display portal, and an input device for receiving implant control input from the user, wherein the patient remote external device comprises a wireless communication unit configured for wireless transmission of control commands to the implantable medical device, and a computing unit. The computing unit is configured for running a control software for creating the controlcommands for the operation of the implantable medical device, transmitting a control interface to the patient display device, receivingimplant control user input generated at the patient display device, from the server, and transforming the user input into the control commands for wireless transmission to the implantable medical device. According to one embodiment, the computing unit is configured to encrypt at least one of the control interface and the control commands. According to one embodiment, the patient display device is configured to encrypt the user input. According to one embodiment, the server is configured to encrypt at least one of the user input received from the patient display device and the control interface received from the patient remote external device. According to one embodiment, the computing unit is configured to encrypt the control interface and the patient display device is configured to decrypt the encrypted control interface. According to one embodiment, the server is configured to act as a router, transferring the encrypted control interface from the patient remote external device to the patient display device without decryption. According to one embodiment of the communication system or patient display device the implantable medical device comprises at least one of: an external heart compression device, an apparatus assisting the pump function of a heart of the patient, an apparatus assisting the pump function comprising a turbine bump placed within a patient’s blood vessel for assisting the pump function of the heart, an operable artificial heart valve, an operable artificial heart valve for increasing the blood flow to the coronary arteries. an implantable drug delivery device, an implantable drug delivery device for injecting directly into a blood vessel and change the position of the injection site, all from within the patient’s body, an implantable drug delivery device for injecting potency enhancing drugs into an erectile tissue of the patient, a hydraulic, mechanic, and/or electric constriction implant, an operable volume filling device, an operable gastric band, an operable implant for stretching the stomach wall of the patient for creating satiety, an implant configured to sense the frequency of the patient ingesting food, an operable cosmetic implant, an operable cosmetic implant for adjust the shape and/or size in the breast region of a patient, an implant controlling medical device for the emptying of a urinary bladder, an implant hindering urinary leakage, an implant hindering anal incontinence, an implant controlling the emptying of fecal matter, an implant monitoring an aneurysm, an implant for hindering the expansion of an aneurysm, an implant lubricating a joint, an implant for affecting the blood flow to an erectile tissue of the patient, an implant for simulating the engorgement of an erectile tissue, an implant with a reservoir for holding bodily fluids, an implant storing and/or emptying a bodily reservoir or a surgically created reservoir, an implant communicating with a database outside the body, an implant able to be programmed from outside the body, an implant able to be programmed from outside the body with a wireless signal, an implant treating impotence, an implant controlling the flow of eggs in the uterine tube, an implant controlling the flow of sperms in the uterine tube, an implant controlling the flow of sperms in the vas deferens, an implant for hindering the transportation of the sperm in the vas deferens, an implant treating osteoarthritis, an implant performing a test of parameters inside the body, an implant controlling specific treatment parameters from inside the body, an implant controlling bodily parameters from inside the body, an implant controlling the blood pressure, an implant controlling the blood pressure by affecting the dilatation of the renal artery, an implant controlling a drug treatment parameter, an implant controlling a parameter in the blood, an implant for adjusting or replacing any bone part of a body of the patient, an implant replacing an organ of the patient or part of an organ of the patient or the function thereof, a vascular treatment device, an implant adapted to move fluid inside the body of the patient, an implant configured to sense a parameter related to the patient swallowing, an implant configured to exercise a muscle with electrical or mechanical stimulation, an implant configured for emptying an intestine portion on command, an operable implant configured to be invaginated in the stomach of the patient to reduce the volume of the stomach substantially more than the volume of the device, an implant configured for emptying the urinary bladder from within the patient’s body by compressing the bladder, an implant configured for draining fluid from within the patient’s body, an implant configured for the active lubrication of a joint with an added lubrication fluid, an implant configured for removing clots and particles from the patient’s blood stream, an implant configured for elongating or straightening a bone in the patient, to reduce scoliosis, a device to stimulate the brain for a several position to a focused point, an artificial stomach replacing the function of the natural stomach, an implant configured for adjusting the position of a female’s urinary tract or bladder neck, an implant configured for stimulating the ampulla vas deference and creating temporary constriction. According to one embodiment, the communication system further comprises a server. The server may comprise a wireless communication unit configured for wirelessly receiving an implant control interface received from the patient remote external device and wirelessly transmitting the implant control interface as a remote display portal to the patient display device. The wireless communication unit is further configured for wirelessly receiving implant control user input from a patient EID external device and wirelessly transmitting the implant control user input to the patient display device. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new private key device, wherein the HCP or HCP admin have such master private key device adapted to able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A patient display device for communication with a patient external device for communication with an implantable medical device, when implanted, is provided. The patient display device comprises a wireless communication unit, a display, and an input device for receivingimplant control input from the user. The patient display device is configured to run a first application for wireless communication with aserver and/or DDI, and run a second application for wireless communication with the patient external device for transmission of theimplant control input to a remote display portal of the patient external device for the communication with the implantable medical device, wherein the second application is configured to be accessed through the first application. The patient display device comprises a first log-in function and a second log-in function, wherein the first log-in function gives the user access to the first application and wherein the first and second log-in function in combination gives the user access to the second application. The first log-in function may be configured to use at least one of a password, pin code, fingerprint, voice and face recognition. A second log-in function within the first application may be configured to use a private key from the user to authenticate, for a defined time period, a second hardware key of the patient external device. According to one embodiment, the first log-in is a PIN-based log-in. According to one embodiment, at least one of the first and second log-in is a log-in based on a biometric input or a hardware key. According to one embodiment, the patient display device further comprises an auxiliary wireless communication unit, and wherein the auxiliary wireless communication unit is configured to be disabled to enable wireless communication with the patient external device. According to one embodiment, the patient display device is configured to wirelessly receive an implant control interface as a remote display portal from the patient external device to be displayed on the display. According to one embodiment, the wireless communication unit is configured for wireless communication with the patient external device using a standard network protocol. According to one embodiment, the wireless communication unit is configured for wireless communication with the patient external device using a proprietary network protocol. According to one embodiment, the wireless communication unit is configured for wireless communication with the patient external device using a first network protocol and with the server using a second network protocol. According to one embodiment, the wireless communication unit is configured for wireless communication with the patient external device using a first frequency band and with the server using a second frequency band. According to one embodiment, the wireless communication unit comprises a Bluetooth transceiver. According to one embodiment, the wireless communication unit comprises a UWB transceiver. According to one embodiment, the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, a communication range of the wireless communication unit is less than a communication range of the auxiliary wireless communication unit. According to one embodiment, the wireless communication unit comprises a first wireless transceiver for communication with the patient external device and a second wireless transceiver for communication with the server. According to one embodiment, the second wireless transceiver is configured to be disabled to enable wireless communication using the first wireless transceiver. According to one embodiment, the patient display device is configured to authenticate the patient external device if a distance between the patient display device and the patient external device is less than a predetermined threshold value, or to be authenticated by the patient external device if a distance between the patient display device and the patient external device is less than a predetermined threshold value. According to one embodiment, the patient display device is configured to allow the transfer of data between the patient display device and the patient external device on the basis of the authentication. According to one embodiment, the patient display device is a wearable external device or a handset. According to one embodiment, the second application is configured to receive data related to a parameter of the implanted medical device. According to one embodiment, the second application is configured to receive data related to a sensor value received from the implanted medical device. According to one embodiment, the second application is configured to receive data related to a parameter related to at least one of: a battery status, a temperature, a time, and an error. According to one embodiment, the patient display device is configured to encrypt the user input. According to one embodiment, the display is configured to encrypt the user input for decryption by the implantable medical device. According to one embodiment, the patient display device is configured to decrypt the control interface received from the patient external device, for displaying the control interface on the display. According to one embodiment, at least one of the first and second application is configured to receive data from an auxiliary external device and present the received data to the user. According to one embodiment, at least one of the first and second application is configured to receive data from an auxiliary external device comprising a scale for determining the weight of the user. According to one embodiment, at least one of the first and second application is configured to receive data related to the weight of the user from an auxiliary external device comprising a scale. According to one embodiment, the patient display device is configured to: wirelessly transmit the data related to the weight of theuser to the patient external device, or wirelessly transmit an instruction derived from the data related to the weight of the user, or wirelessly transmit an instruction derived from a combination of the data related to the weight of the user and the implant control input received from the user. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new private key device, wherein the HCP or HCP admin have such master private key device adapted to able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A communication system for enabling communication between a patient display device and an implantable medical device, when implanted, is provided. The communication system comprises a patient display device, a server or DDI, and a patient remote external device. The patient display device comprises a wireless communication unit configured for wirelessly receiving an implant control interface as a remote display portal from the patient remote external device, the wireless communication unit further being configured for wirelessly transmitting implant control user input to the patient remote external device, a display for displaying the received implant control interfaceas a remote display portal, and an input device for receiving implant control input from the user. The patient display device is configured to run a first application for wireless communication with the server, and to run a second application for wireless communication with the patient remote external device for transmission of the implant control input to the remote display portal of the patient remote external device for the communication with the implantable medical device. The patient remote external device comprises a wireless communication unit configured for wireless transmission of control commands based on the implant control input to the implantable medical device andconfigured for wireless communication with the patient display device. According to one embodiment, the patient display device comprises a first log-in function and a second log-in function, and wherein the first log-in function gives the user access to the first application and wherein the first and second log-in function in combination gives the user access to the second application. According to one embodiment, the second application is configured to receive data related to a parameter of the implanted medical device. According to one embodiment, the second application is configured to receive data related to a sensor value received from the implanted medical device. According to one embodiment, the second application is configured to receive data related to a parameter related to at least one of: a battery status, a temperature, a time, or an error. According to one embodiment, the patient display device is configured to encrypt the user input. According to one embodiment, the display is configured to encrypt the user input for decryption by the implantable medical device. According to one embodiment, the patient remote external device is configured to act as a router, transferring the encrypted user input from the patient display device to the implantable medical device without decryption. According to one embodiment, the patient remote external device is configured to encrypt at least one of the control interface and the control commands. According to one embodiment, the patient remote external device is configured to encrypt the control interface and wherein the patient display device is configured to decrypt the encrypted control interface. A computer program product is provided, configured to run in a patient display device comprising a wireless communication unit, a display for displaying the received implant control interface as a remote display portal, and an input device for receiving implant control input from a user. The computer program product comprises: a first application for communication with a server or DDI, a second application for communication with an patient remote external device for transmission of the implant control input via the remote display portal of the patient remote external device for the communication with an implantable medical device, wherein thesecond application is configured to be accessed through the first application, a first log-in function using at least one of a password, pincode, fingerprint, or face recognition, and a second log-in function within the first application, using a private key from the user to authenticate for a defined time period a second hardware key of the patient remote external device. The first log-in function gives the user access to the first application and the first and second log-in function in combination gives the user access to the second application. According to one embodiment, the second application is configured to receive data related to a parameter of the implanted medical device. According to one embodiment, the second application is configured to receive data related to a sensor value received from the implanted medical device. According to one embodiment, the second application is configured to receive data related to a parameter related to at least one of: a battery status, a temperature, a time, or an error. According to one embodiment of the communication system, patient display device or computer program product, the implantable medical device comprises at least one of: an external heart compression device, an apparatus assisting the pump function of a heart of the patient, an apparatus assisting the pump function comprising a turbine bump placed within a patient’s blood vessel for assisting the pump function of the heart, an operable artificial heart valve, an operable artificial heart valve for increasing the blood flow to the coronary arteries. an implantable drug delivery device, an implantable drug delivery device for injecting directly into a blood vessel and change the position of the injection site, all from within the patient’s body, an implantable drug delivery device for injecting potency enhancing drugs into an erectile tissue of the patient, a hydraulic, mechanic, and/or electric constriction implant, an operable volume filling device, an operable gastric band, an operable implant for stretching the stomach wall of the patient for creating satiety, an implant configured to sense the frequency of the patient ingesting food, an operable cosmetic implant, an operable cosmetic implant for adjust the shape and/or size in the breast region of a patient, an implant controlling medical device for the emptying of a urinary bladder, an implant hindering urinary leakage, an implant hindering anal incontinence, an implant controlling the emptying of fecal matter, an implant monitoring an aneurysm, an implant for hindering the expansion of an aneurysm, an implant lubricating a joint, an implant for affecting the blood flow to an erectile tissue of the patient, an implant for simulating the engorgement of an erectile tissue, an implant with a reservoir for holding bodily fluids, an implant storing and/or emptying a bodily reservoir or a surgically created reservoir, an implant communicating with a database outside the body, an implant able to be programmed from outside the body, an implant able to be programmed from outside the body with a wireless signal, an implant treating impotence, an implant controlling the flow of eggs in the uterine tube, an implant controlling the flow of sperms in the uterine tube, an implant controlling the flow of sperms in the vas deferens, an implant for hindering the transportation of the sperm in the vas deferens, an implant treating osteoarthritis, an implant performing a test of parameters inside the body, an implant controlling specific treatment parameters from inside the body, an implant controlling bodily parameters from inside the body, an implant controlling the blood pressure, an implant controlling the blood pressure by affecting the dilatation of the renal artery, an implant controlling a drug treatment parameter, an implant controlling a parameter in the blood, an implant for adjusting or replacing any bone part of a body of the patient, an implant replacing an organ of the patient or part of an organ of the patient or the function thereof, a vascular treatment device, an implant adapted to move fluid inside the body of the patient, an implant configured to sense a parameter related to the patient swallowing, an implant configured to exercise a muscle with electrical or mechanical stimulation, an implant configured for emptying an intestine portion on command, an operable implant configured to be invaginated in the stomach of the patient to reduce the volume of the stomach substantially more than the volume of the device, an implant configured for emptying the urinary bladder from within the patient’s body by compressing the bladder, an implant configured for draining fluid from within the patient’s body, an implant configured for the active lubrication of a joint with an added lubrication fluid, an implant configured for removing clots and particles from the patient’s blood stream, an implant configured for elongating or straightening a bone in the patient, to reduce scoliosis, a device to stimulate the brain for a several position to a focused point, an artificial stomach replacing the function of the natural stomach, an implant configured for adjusting the position of a female’s urinary tract or bladder neck, an implant configured for stimulating the ampulla vas deference and creating temporary constriction. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new private key device, wherein the HCP or HCP admin have such master private key device adapted to able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solidfood or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A communication system for enabling communication between a patient display device, a patient external device, a server and animplantable medical device, is provided. The communication system comprises a server, a patient display device, a patient external device, and an implantable medical device. The patient display device comprises a wireless communication unit for wirelessly communicating with at least one of the patient external device and the server, a display, and an input device for receiving input from the user. The patient external device comprises a wireless communication unit configured for wireless transmission of control commands to the implantable medical device and configured for wireless communication with at least one of the patient display device and the server. Further, the server comprises a wireless communication unit configured for wireless communication with at least one of the patient display device and the patient external device, wherein the implantable medical device comprises a wireless communication unit configured for wireless communication with the patient external device. The implantable medical device further comprises an encryption unit and is configured to: encrypt data destined for the server, transmit the data to the server via the patient external device, wherein the patient external device acts as a router transferring the data without full decryption. In an example, the implantable medical device comprises an encryption unit and is configured to: encrypt data destined for the patient display device, transmit the data to the patient display device via the patient external device, wherein the patient external device acts as a router transferring the data without full decryption. In an example, the server comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient external device, wherein the patient externaldevice acts as a router transferring the data without full decryption, In an example, the server comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient display device and the patient external device, wherein the patient display device and the patient external device acts as a router transferring the data without full decryption. In an example, the patient display device comprises an encryption unit and is configured to:encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient external device, wherein the patient external device acts as a router transferring the data without full decryption. In an example, the patient display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the server and the patient external device, wherein the server and the patient external device acts as a router transferring the data without full decryption. According to one embodiment, the patient display device is configured to wirelessly receive an implant control interface from the patient external device to be displayed on the display. According to one embodiment, at least two of: the wireless communication unit of the server, the wireless communication unit of the patient display device, the wireless communication unit of the patient external device, and the wireless communication unit of the implantable medical device, are configured for wireless communication using a standard network protocol. According to one embodiment, wherein at least two of: the wireless communication unit of the server, the wireless communication unit of the patient display device, the wireless communication unit of the patient external device, and the wireless communication unit of the implantable medical device, are configured for wireless communication using a proprietary network protocol. According to one embodiment, the wireless communication unit of the patient external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the server, or use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the patient display device. According to one embodiment, the wireless communication unit of the patient external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the server, or use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the patient display device. According to one embodiment, the wireless communication unit of the patient display device is configured to use a first network protocol for communication with the patient external device and use a second network protocol for communication with the server. According to one embodiment, the wireless communication unit of the patient display device is configured to use a first frequency band for communication with the patient external device and use a second frequency band for communication with the server. According to one embodiment, the wireless communication unit of the server is configured to use a first network protocol for communication with the patient external device and use a second network protocol for communication with the patient display device. According to one embodiment, the wireless communication unit of the server is configured to use a first frequency band for communication with the patient external device and use a second frequency band for communication with the patient display device. According to one embodiment, the wireless communication unit of at least one of the server, the patient display device, the patient external device, and the implantable medical device comprises a Bluetooth transceiver. According to one embodiment, the wireless communication unit of at least one of the server, the patient display device, the patient external device, and the implantable medical device comprises a UWB transceiver. According to one embodiment, the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, the wireless communication unit of the patient external device comprises a first wirelesstransceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the server, and wherein the second wireless transceiver has a longer effective range than the first wireless transceiver. According to one embodiment, the wireless communication unit of the patient external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the patient display device, and wherein the second wireless transceiver has a longer effective range than the first wireless transceiver. According to one embodiment, the wireless communication unit of the patient display device comprises a first wireless transceiver for wireless communication with the patient external device, and a second wireless transceiver for wireless communication with the server, and wherein the second wireless transceiver has a longer effective range than the first wireless transceiver. According to one embodiment, the second wireless transceiver has an effective range being one of: 2 times, 4 times, 8 times 20 times, 50 times or 100 times longer than the first wireless transceiver. According to one embodiment, the second wireless transceiver is configured to be disabled to enable wireless communication using the first wireless transceiver. According to one embodiment, at least one of: the patient display device is configured to authenticate the patient external device if a distance between the patient display device and the patient external device is less than a predetermined threshold value, the patient display device is configured to be authenticated by the patient external device if a distance between the patient display device and the patient external device is less than a predetermined threshold value, the patient display device is configured to authenticate the implantable medical device if a distance between the patient display device and the implantable medical device is less than a predetermined threshold value, the patient display device is configured to be authenticated by the implantable medical device if a distance between the patient display device and the implantable medical device is less than a predetermined threshold value, the patient external device is configured to authenticate the patient display device if a distance between the patient external device and the patient display device is less than a predetermined threshold value, the patient external device is configured to be authenticated by the patient display device if a distance between the patient external device and the patient display device is less than a predetermined threshold value, the patient external device is configured to authenticate the implantable medical device if a distance between the patient external device and the implantable medical device is less than a predetermined threshold value, andthe patient external device is configured to be authenticated by the implantable medical device if a distance between the patient external device and the implantable medical device is less than a predetermined threshold value. According to one embodiment, the patient display device is configured to allow the transfer of data between the patient display device and the patient external device on the basis of the authentication. According to one embodiment, the patient external device is configured to allow the transfer of data between the patient display device and the patient external device on the basis of the authentication. According to one embodiment, the patient external device is configured to allow the transfer of data between the patient external device and the implantable medical device on the basis of the authentication. According to one embodiment, the patient display device is a wearable patient external device or a handset. According to one embodiment, the data encrypted by the implantable medical device is related to at least one of: a battery status, a temperature, a time, or an error. A server for use in the communication system according to any one of the above embodiments is provided. A patient display device for use in the communication system according to any one of the above embodiments is provided. A patient external device for use in the communication system according to any one of the above embodiments is provided. An implantable medical device for use in the communication system according to any one of the above embodiments is provided. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new private key device, wherein the HCP or HCP admin have such master private key device adapted to able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A system configured for changing pre-programmed treatment settings of an implantable medical device, when implanted in a patient, from a distant remote location in relation to the patient, is provided. The system comprises at least one health care provider, HCP, EID external device, and a HCP private key device. HCP EID external device is adapted to receive a command from the HCP to change said pre-programmed treatment settings of an implanted medical device, and further adapted to be activated and authenticated and allowed to perform said command by the HCP providing the HCP private key device, wherein the HCP private key device is adapted to be provided to theHCP EID external device via at least one of: a reading slot or comparable for the HCP private key device, and a RFID communication or other close distance wireless activation communication. The HCP EID external device comprises at least one of: a reading slot or comparable forthe HCP private key device, a RFID communication, and other close distance wireless activation communication or electrical direct contact. The HCP EID external device further comprises at least one wireless transceiver configured for communication with a data infrastructure server, DDI, through a first network protocol. Further, the system comprises a data infrastructure server, DDI, adapted to receive command from said HCP EID external device and to relay the received command without modifying said command to a patient EID external device, wherein the DDI comprises one wireless transceiver configured for communication with said patient external device, and a patient EID external device adapted to receive the command relayed by the DDI, further adapted to send this command to the implanted medical device, further adapted to receive a command from the HCP EID external device via the DDI to change said pre-programmed treatment settings of the implanted medical device, and further adapted to be activated and authenticated and allowed to perform said command by the patient providing a patient private key device adapted to be provided to the patient EID external device by the patient via at least one of: a reading slot or comparable for the patient private key device, a RFID communication or other close distance wireless activation communication orelectrical direct contact. The patient EID external device comprises at least one of a reading slot or comparable for the HCP private keydevice, a RFID communication, and other close distance wireless activation communication or electrical direct contact. The patient EID external device further comprises at least one wireless transceiver configured for communication with the implanted medical device through a second network protocol. Further, the implanted medical device is configured to treat the patient or perform a bodily function. According to one embodiment, at least one of the patient private key device or HCP private key device comprises a hardware key. According to one embodiment, the private key device is at least one of, a smartcard, a key-ring device, a watch an arm or wrist band a neckless or any shaped device. According to one embodiment of the system, at least two of: the HCP EID external device, the patient EID external device, the HCP private key device, the patient private key device, and the DDI are configured for wireless communication using a standard network protocol. According to one embodiment, at least two of: the HCP EID external device, the patient EID external device, the HCP private key device, the patient private key device, and the DDI are configured for wireless communication using a proprietary network protocol. According to one embodiment, the patient EID external device is configured to use a first network protocol for communicationwith the implantable medical device and use a second network protocol for communication with the DDI. According to one embodiment, the patient EID external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the DDI. According to one embodiment, the DDI is configured to use a first frequency band for communication with the patient EID external device and a second frequency band for communication with the patient private key device. According to one embodiment, at least one of the HCP EID external device, the patient EID external device, the HCP private key device, the patient private key device and the DDI comprises a Bluetooth transceiver. According to one embodiment, at least one of the HCP EID external device, the patient EID external device, the HCP private key device, the patient private key device and the DDI comprises a UWB transceiver. According to one embodiment, the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, the patient EID external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the DDI, and wherein the second wireless transceiver has longer effective range than the first wireless transceiver. According to one embodiment, the patient private key device comprises a first wireless transceiver for wireless communication with the HCP EID external device, and a second wireless transceiver for wireless communication with the DDI, and wherein the secondwireless transceiver has longer effective range than the first wireless transceiver. According to one embodiment, the second wireless transceiver has an effective range being one of: 2 times, 4 times, 8 time, 20 times, 50 times or 100 times longer than the effective range of the first wireless transceiver. According to one embodiment, the second wireless transceiver is configured to be disabled to enable wireless communication using the first wireless transceiver. According to one embodiment, the patient EID external device is configured to allow transfer of data between the EID external device and the implantable medical device on the basis of an authentication of the patient EID external device. According to one embodiment, the patient EID external device is a wearable patient external device or a handset. According to one embodiment, the data encrypted by the implantable medical device is related to at least one of: a battery status, a temperature, a time, or an error. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new private key device, wherein the HCP or HCP admin have such master private key device adapted to able to replace and pair a new patient privatekey device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A system is provided, configured for changing pre-programmed treatment settings of an implantable medical device, whenimplanted in a patient, by a health care provider, HCP, in the physical presence of the patient. The system comprises at least one HCP EID external device adapted to receive a command from the HCP, directly or indirectly, to change said pre-programmed treatment settings insteps of an implantable medical device, when implanted, wherein the HCP EID external device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing an HCP private key device comprising a HCP private key. The HCP private key device comprises at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device. The HCP EID external device is adapted to be involved in at least one of: receiving information from the implant, receiving information from a patient remote external device, actuating the implanted medical device, changing pre-programmed settings, and updating software of the implantable medical device, when implanted. The HCP EID external device is further adapted to be activated, authenticated, and allowed to perform said command also by the patient. The system further comprises a patient private key device comprising a patient private key, wherein the patient private key device comprising at least one of: a smart card, a keyring device, a watch, a arm or wrist band,a necklace, and any shaped device. The HCP private key and the patient private key are required for performing said actions by the HCP EID external device to at least one of: receive information from the implant, to receive information from a patient remote external device, to actuate the implanted medical device, to change pre-programmed settings, and to update software of the implantable medical device, when the implantable medical device is implanted. According to one embodiment, the HCP EID external device further comprises a wireless transceiver configured for communication with the implanted medical device through a second network protocol. According to one embodiment, the HCP private key device is adapted to be provided to the at least one HCP external device via at least one of: a reading slot or comparable for the HCP private key device, a RFID communication, and a close distance wireless activation communication unit, or electrical direct contact. According to one embodiment, the HCP EID external device comprises at least one of reading slot or comparable for the HCP private key device, a RFID communication and a close distance wireless activation communication unit, or electrical direct contact. According to one embodiment, the HCP EID external device is adapted to receive a command from a HCP dedicated device to change said pre-programmed treatment steps of the implantable medical device, when implanted, wherein the HCP dedicated device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing their private key. According to one embodiment, at least two of: the HCP EID external device, the patient EID external device, the HCP private key device, and the patient private key device, are configured for wireless communication using a standard network protocol. According to one embodiment, at least two of: the HCP EID external device, the patient EID external device, the HCP private key device, and the patient private key device, are configured for wireless communication using a proprietary network protocol. According to one embodiment, the patient EID external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the patient private key device. According to one embodiment, the patient EID external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the patient private key device. According to one embodiment, at least one of the HCP EID external device, the patient EID external device, the HCP private key device, and the patient private key device comprises a Bluetooth transceiver. According to one embodiment, at least one of the HCP EID external device, the patient EID external device, the HCP private key device, and the patient private key device comprises a UWB transceiver. According to one embodiment, the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, the patient EID external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the patient private key device, and wherein the second wireless transceiver has longer effective range than the first wireless transceiver. According to one embodiment, the second wireless transceiver has an effective range being one of: 2 times, 4 times, 8 time, 20 times, 50 times or 100 times longer than the effective range of the first wireless transceiver. According to one embodiment, the second wireless transceiver is configured to be disabled to enable wireless communication using the first wireless transceiver. According to one embodiment, the patient EID external device is configured to allow transfer of data between the EID external device and the implantable medical device on the basis of an authentication of the patient EID external device. According to one embodiment, the patient EID external device is a wearable patient external device or a handset. According to one embodiment, the data encrypted by the implantable medical device is related to at least one of: a battery status, a temperature, a time, or an error. A system is provided, configured to change pre-programmed and pre-selected treatment actions of an implantable medical device, when implanted in a patient, by command from the patient. The system comprises an implantable medical device, a patient remote external device, a wireless transceiver configured for communication with the implantable medical device, when the medical device isimplanted, through a second network protocol, and a remote display portal. The remote display portal is configured to receive content delivered from the patient remote external device to expose buttons to express the will to actuate the functions of the implanted medical device by the patient through the patient remote external device, and further configured to present the display portal remotely on a patientdisplay device allowing the patient to actuate the functions of the implanted medical device through the display portal of the patient remote external device visualised on the patient display device. According to one embodiment, the wireless transceiver, the remote display portal, and the remote display portal are comprised in the patient remote external device. According to one embodiment, the system further comprises the patient display device, which may comprise a supporting application, a display which hosts the Remote Display Portal, and a patient display device private key. According to one embodiment, the remote display portal is capable of generating a command to be signed by the patient display device private key. According to one embodiment, the patient remote external device is adapted to accept input from the patient via said patient display device through its remote display portal. According to one embodiment, the patient remote external device comprises a graphical user interface arranged on a touch- responsive display exposing buttons to express actuation functions of the implanted medical device. According to one embodiment, the system is configured to allow the patient to actuate the implant at home through the patient remote external device by means of an authorization granted by a patient private key. According to one embodiment, the patient private key comprises at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device. According to one embodiment, the system is configured to allow the patient to actuate the implantable medical device, when implanted, at home through the patient remote external device, using an authorization granted by the patient private key. According to one embodiment, system further comprises a patient EID external device comprising at least one of: a reading slot or comparable for the patient private key device, a RFID communication, and a close distance wireless activation communication, or electrical direct contact. According to one embodiment, the patient EID external device is adapted to be synchronised with the patient remote external device. According to one embodiment, the patient EID external device further comprises at least one of: a wireless transceiver configured for communication with the patient, a remote external device, and a wired connector for communication with the patient remote external device. According to one embodiment, the patient EID external device is adapted to generate an authorization to be signed by the patient private key to be installed into at least one of: the patient remote external device through the patient EID external device, and the implantable medical device. According to one embodiment, the system comprises a patient display device comprising a supporting application capable of displaying the remote display portal with content delivered from the patient remote external device. According to one embodiment, the remote display portal and patient remote external device are adapted to expose buttons to express the will to actuate the functions of the implanted medical device by the patient through the patient remote external device. According to one embodiment, the patient display device comprises at least one of: a display which hosts the remote display portal, and a patient display device private key. According to one embodiment, the remote display portal is capable of generating a command to be signed by the patient private key. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new privatekey device, wherein the HCP or HCP admin have such master private key device adapted to able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A system is provided, configured for providing information from an implantable medical device, when implanted in a patient, from a distant remote location in relation to the patient. The system comprises at least one patient EID external device adapted to receive information from the implant, adapted to send such information further on to a server or dedicated data infrastructure, DDI, further adapted to be activated and authenticated and allowed to receive said information by the implanted medical device by the patient providing a private key. Further, the system comprises a patient private key device comprising the private key adapted to be provided to the patient EIDexternal device via at least one of: a reading slot or comparable for the patient private key device, a RFID communication or other closedistance wireless activation communication or direct electrical connection. The patient EID external device comprises at least one of: a reading slot or comparable for the patient private key device, an RFID communication, and other close distance wireless activation communication or direct electrical contact. Further, the patient EID external device comprises at least one wireless transceiver configured for communication with the DDI, through a first network protocol. According to one embodiment, the at least one patient EID external device is adapted to receive information from the implant, through a second network protocol. According to one embodiment, the system comprises the DDI, wherein the DD1 is adapted to receive information from said patient EID external device, and wherein the DDI comprises a wireless transceiver configured for communication with said patient EID external device. According to one embodiment, the patient EID external device is adapted to receive a command relayed by the DDI, to further send the command to the implanted medical device to change said pre-programmed treatment settings of the implanted medical device, and further adapted to be activated and authenticated and allowed to perform said command by the patient providing the patient private key. According to one embodiment, the patient private key device is adapted to provide the patient private key to the patient EIDexternal device by the patient via at least one of; a reading slot or comparable for the patient private key device, an RFID communication or other close distance wireless activation communication, or electrical direct contact. According to one embodiment, the patient EID external device comprises at least one of: a reading slot or comparable for the HCP private key device, a RFID communication, and other close distance wireless activation communication, or direct electrical contact. According to one embodiment, the patient EID external device further comprising at least one wireless transceiver configured for communication with the implanted medical device through a second network protocol. According to one embodiment, the system comprises the implantable medical device, which may be adapted to, when implanted, treat the patient or perform a bodily function. According to one embodiment, the patient private key comprises at least one of: a smart card, a keyring device, a watch, an arm band or wrist band, a necklace, and any shaped device. According to one embodiment, at least two of: the patient EID external device, the IDD, and the patient private key device, are configured for wireless communication using a standard network protocol. According to one embodiment, at least two of: the patient EID external device, the IDD, and the patient private key device, areconfigured for wireless communication using a proprietary network protocol. According to one embodiment, the patient EID external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the patient private key device. According to one embodiment, the patient EID external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the patient private key device. According to one embodiment, at least one of the patient EID external device, the patient private key device and the IDD comprises a Bluetooth transceiver. According to one embodiment, at least one of the patient EID external device, the patient private key device and the IDD comprises a UWB transceiver. According to one embodiment, the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, the patient EID external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the patient private key device, and wherein the second wireless transceiver has longer effective range than the first wireless transceiver. According to one embodiment, the second wireless transceiver has an effective range being one of: 2 times, 4 times, 8 time, 20 times, 50 times or 100 times longer than the effective range of the first wireless transceiver. According to one embodiment, the second wireless transceiver is configured to be disabled to enable wireless communication using the first wireless transceiver. According to one embodiment, the patient EID external device is a wearable patient external device or a handset. According to one embodiment, the data encrypted by the implantable medical device is related to at least one of: a battery status, a temperature, a time, or an error. According to one embodiment, the system comprises a master private key device configured to allow issuance of a new privatekey device, wherein the HCP or HCP admin have such master private key device adapted to able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A system is provided, comprising, an implantable medical device adapted to, when implanted in a patient, to communicate with an external device, the external device comprising at least one of a patient remote external device or a patient EID external device. The systemfurther comprises the patient EID external device adapted to communicate with and send commands to the implantable medical device when implanted, to change pre-programmed settings, and a patient private key device comprising a patient private key, adapted to activate and authenticate and allow to perform said command by the patient EID external device, wherein said private key is adapted to be provided to the external device via at least one of: a reading slot or comparable for the HCP private key device, an RFID communication or other close distance wireless activation communication, or direct electrical contact. Further the system comprises a data infrastructure server, DDI, adapted to send commands to the patient EID external device for further transport to the implanted medical device, to inactivate the authority and authenticating function of the patient private key. According to one embodiment, the at least one patient remote external device comprises a patient remote external device private key, wherein the DDI via the patient EID external device is able to inactivate the authority and authenticating function of the patient remote external device, thereby inactivating the patient remote external device. According to one embodiment, the patient EID external device comprises at least one wireless transceiver configured for communication with the DD1 via a first network protocol. According to one embodiment, the system comprises the DDI, wherein the DDI is adapted to receive command from a HCP EIDexternal device, and to send the received command to the patient EID external device, wherein the DDI comprises a wireless transceiver configured for communication with said patient external device. According to one embodiment, the patient EID external device is adapted to receive the command from the DDI, wherein thecommand originates from a health care provider, HCP, and wherein the patient EID is adapted to inactivate the patient private key and to send the command to the implanted medical device. According to one embodiment, the patient EID external device is adapted to receive the command from the DDI, wherein the command originates from a health care provider, HCP, wherein the patient EID external device is adapted to receive the command from the HCP via the DDI to inactivate the patient remote external device comprising a patient remote external device private key, and wherein the patient EID external device is further adapted to send this command to the implanted medical device. According to one embodiment, the patient EID external device further comprises at least one wireless transceiver configured for communication with the implanted medical device through a second network protocol. According to one embodiment, at least one of the patient private key and a patient remote external device private key comprises a hardware key. According to one embodiment, the private key device is at least one of, a smartcard, a key-ring device, a watch an arm or wrist band a neckless or any shaped device. According to one embodiment, at least two of: the patient remote external device, the patient EID external device, the patient private key device, and the DDI, are configured for wireless communication using a standard network protocol. According to one embodiment, wherein at least two of: the patient remote external device, the patient EID external device, the patient private key device, and the DDI, are configured for wireless communication using a proprietary network protocol. According to one embodiment, the patient EID external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the patient private key device. According to one embodiment, the patient EID external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the patient private key device. According to one embodiment, at least one of the patient remote external device, the patient EID external device, the patient private key device, and the DDI, comprise a Bluetooth transceiver. According to one embodiment, at least one of the patient remote external device, the patient EID external device, the patient private key device, and the DDI, comprise an UWB transceiver. According to one embodiment, the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. According to one embodiment, the patient EID external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the patient private key device, and wherein the second wireless transceiver has longer effective range than the first wireless transceiver. According to one embodiment, the second wireless transceiver has an effective range being one of: 2 times, 4 times, 8 time, 20 times, 50 times or 100 times longer than the effective range of the first wireless transceiver. According to one embodiment, the second wireless transceiver is configured to be disabled to enable wireless communicationusing the first wireless transceiver. According to one embodiment, the patient EID external device is a wearable patient external device or a handset. According to one embodiment, the data encrypted by the implantable medical device is related to at least one of: a battery status, a temperature, a time, or an error. According to one embodiment, the system comprises a master private key device configured to allow issuance of new private keydevice, wherein the HCP or HCP admin have such master private key device adapted to be able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to atleast one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. A system is provided, configured for changing pre-programmed treatment settings in steps of an implantable medical device, when implanted in a patient, by a health care provider, HCP, either in the physical presence of the patient or remotely with the patient on distance. The system comprises at least one HCP EID external device adapted to receive a command directly or indirectly from the HCP to change said pre-programmed treatment settings in steps of the implantable medical device, when implanted. The HCP EID external device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing a HCP private key device comprising a HCP private key. The HCP private key comprises at least one of: a smart card, a keyring device, a watch, an arm or wrist band, a necklace, and any shaped device. The system further comprises a patient private key device comprising a patient private key, comprising at least one of: a smart card, a keyring device, a watch, an arm or wrist band, a necklace, and any shaped device. Both the HCP and patient private key is required for performing said action by the HCP EID external device to change the pre-programmed settings in the implant and to update software of the implantable medical device, when the implantable medical device is implanted. The patient private key is adapted to activate, be authenticated, and allowed to perform said command provided by the HCP, either via the HCP EID external device or when the action is performed remotely via a patient EID external device. According to one embodiment, the system comprises a master private key device that allow issuance of new private key devicewherein the HCP or HCP admin have such master private key device adapted to be able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system further comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system further comprises a food sensor adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is configured to be connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. According to one embodiment, the HCP EID external device further comprises a wireless transceiver configured for communication with the implanted medical device through a second network protocol. According to one embodiment, the HCP private key device is adapted to be provided to the at least one HCP external device via at least one of: a reading slot or comparable for the HCP private key device, a RFID communication, and a close distance wireless activation communication unit, or electrical direct contact. According to one embodiment, the HCP EID external device comprises at least one of: reading slot or comparable for the HCP private key device, a RFID communication, and a close distance wireless activation communication unit, or electrical direct contact. According to one embodiment, the HCP EID external device is adapted to receive a command from an HCP dedicated device to change said pre-programmed treatment steps of the implantable medical device, when implanted, wherein the HCP dedicated device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing their private key. According to one embodiment, the HCP EID external device and the HCP private key device are configured for wireless communication using a standard network protocol. According to one embodiment, the HCP EID external device and the HCP private key device are configured for wireless communication using a proprietary network protocol. According to one embodiment, the HCP EID external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the HCP private key device. According to one embodiment, the HPC EID external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the HCP private key device. According to one embodiment, at least one of the HCP EID external device and the HCP private key device comprises a Bluetooth transceiver. According to one embodiment, at least one of the HCP EID external device and the HCP private key device comprises a UWB transceiver. A system is provided, configured for changing pre-programmed treatment settings in steps of an implantable medical device, when implanted in a patient, by a health care provider, HCP, with the patient on remote on distance. The system comprises at least one HCPEID external device adapted to receive a command from the HCP direct or indirect, to change said pre-programmed treatment settings in steps of an implantable medical device, when implanted, wherein the HCP EID external device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP. The action by the HCP EID external device to change pre-programmed settings in the implant and to update software of the implantable medical device, when the implantable medical device is implanted, is adapted to be authenticated by a HCP private key device and a patient private key device. According to one embodiment, the HCP private key device comprising a HCP private key, comprising at least one of: a smart card, a keyring device, a watch, an arm or wrist band, a necklace, and any shaped device. According to one embodiment, the patient private key device comprises a patient private key, comprising at least one of: a smart card, a keyring device, a watch, an arm or wrist band, a necklace, and any shaped device. According to one embodiment, the patient private key is adapted to activate, be authenticated, and allowed to perform said command provided by the HCP, either via the HCP EID external device or when the action is performed remotely via a patient EID external device. According to one embodiment, the system further comprises a dedicated data infrastructure, DDI, the patient EID external device, and the HCP EID external device, wherein the communication between the patient EID external device and the HCP EID external device is performed via the DDI. According to one embodiment, the system comprises a master private key device that allows issuance of new private key devicewherein the HCP or HCP admin have such master private key device adapted to be able to replace and pair a new patient private key device or HCP private key device into the system. According to one embodiment, the patient remote external device and the patient EID external device are an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system further comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallow solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. According to one embodiment, the HCP EID external device further comprises a wireless transceiver configured for communication with the implanted medical device through a second network protocol. According to one embodiment, the HCP private key device is adapted to be provided to the at least one HCP external device via at least one of: a reading slot or comparable for the HCP private key device, a RFID communication, and a close distance wireless activation communication unit, or electrical direct contact. According to one embodiment, the HCP EID external device comprises at least one of: reading slot or comparable for the HCP private key device, a RFID communication, and a close distance wireless activation communication unit, or electrical direct contact. According to one embodiment, the HCP EID external device is adapted to receive a command from an HCP dedicated device tochange said pre-programmed treatment steps of the implantable medical device, when implanted, wherein the HCP dedicated device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing their private key. According to one embodiment, the HCP EID external device and the HCP private key device are configured for wireless communication using a standard network protocol. According to one embodiment, the HCP EID external device and the HCP private key device are configured for wireless communication using a proprietary network protocol. According to one embodiment, the HCP EID external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the HCP private key device. According to one embodiment, the HPC EID external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the HCP private key device. According to one embodiment, at least one of the HCP EID external device and the HCP private key device comprises a Bluetooth transceiver. According to one embodiment, at least one of the HCP EID external device and the HCP private key device comprises a UWB transceiver. A system is provided, which is configured for changing pre-programmed treatment settings of an implantable medical device, when implanted in a patient, from a distant remote location in relation to the patient. The system comprises at least one health care provider, HCP, external device adapted to receive a command from the HCP to change said pre-programmed treatment settings of animplanted medical device. The HCP external device is further adapted to be activated and authenticated and allowed to perform said command by the HCP providing a HCP private key device adapted to be provided to an HCP EID external device via at least one of; a reading slot or comparable for the HCP private key device, a RFID communication or other close distance wireless activation communication. The HCP EID external device comprises at least one of: a reading slot or comparable for the HCP private key device, a RFID communication, andother close distance wireless activation communication or electrical direct contact. The HCP EID external device further comprises at least one wireless transceiver configured for communication with a patient EID external device, through a first network protocol. The system comprises the patient EID external device, the patient EID external device being adapted to receive command from said HCP external device, and to relay the received command without modifying said command to the implanted medical device. The patient EID external devicecomprises one wireless transceiver configured for communication with said patient external device, wherein the patient EID is adapted to send the command to the implanted medical device, to receive a command from the HCP to change said pre-programmed treatment settings of the implanted medical device, and further to be activated and authenticated and allowed to perform said command by the patient providing a patient private key device comprising a patient private key. According to one embodiment, at least one of the patient private key device or HCP private key device comprises a hardware key. According to one embodiment, the private key device is at least one of, a smartcard, a key-ring device, a watch an arm or wrist band a neckless or any shaped device. According to one embodiment, the system comprises a master private key device that allow issuance of new private key devicewherein the HCP or HCP admin have such master private key device adapted to be able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. According to one embodiment, the patient remote external device and the patient EID external device is an integrated unit. According to one embodiment, the HCP dedicated device and the HCP EID external device are an integrated unit. According to one embodiment, the system comprises a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. According to one embodiment, the system comprises a food sensor, adapted to measure at least if the patient swallow solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake. According to one embodiment, the HCP EID external device further comprises a wireless transceiver configured for communication with the implanted medical device through a second network protocol. According to one embodiment, the HCP private key device is adapted to be provided to the at least one HCP external device via at least one of; a reading slot or comparable for the HCP private key device, a RFID communication, and a close distance wireless activation communication unit, or electrical direct contact. According to one embodiment, the HCP EID external device comprises at least one of: reading slot or comparable for the HCP private key device, a RFID communication, and a close distance wireless activation communication unit, or electrical direct contact. According to one embodiment, the HCP EID external device is adapted to receive a command from an HCP dedicated device to change said pre-programmed treatment steps of the implantable medical device, when implanted, wherein the HCP dedicated device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing their private key. According to one embodiment, the HCP EID external device and the HCP private key device are configured for wireless communication using a standard network protocol. According to one embodiment, the HCP EID external device and the HCP private key device are configured for wireless communication using a proprietary network protocol. According to one embodiment, the HCP EID external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the HCP private key device. According to one embodiment, the HPC EID external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the HCP private key device. According to one embodiment, at least one of the HCP EID external device and the HCP private key device comprises a Bluetooth transceiver. According to one embodiment, at least one of the HCP EID external device and the HCP private key device comprises a UWB transceiver. An implantable energized medical device configured to be held in position by a tissue portion of a patient is provided, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion areprevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the connecting portion and second portion are configured to form a connecting interface between the connecting portion and the second portion, and the second portion extends along a first direction being parallel to the second plane, wherein the second portion has a lengthwise cross-sectional area along the first direction, wherein a second lengthwise cross-sectional area is smaller than a first lengthwise cross-sectional area and wherein the first lengthwise cross-sectional area is located closer to said connecting interface with regard to the first direction. In some embodiments, the second portion has a first end and a second end opposing the first end along the first direction, wherein the second portion has a length between the first and second end, and wherein the second portion has an intermediate region and a distal region, wherein the intermediate region is defined by the connecting interface between the connecting portion and the second portion, and the distal region extends from the connecting interface between the connecting portion and the second portion to the second end. In some embodiments, the lengthwise cross-sectional area of the second portion decreases continuously from an end of the intermediate region towards the second end. In some embodiments, the lengthwise cross-sectional area of the second portion decreases linearly from an end of the intermediate region towards the second end. In some embodiments, the lengthwise cross-sectional area of the second portion decreases stepwise from an end of the intermediate region towards the second end. In some embodiments, the distal region of the second portion is conically shaped. In some embodiments, the second portion has rotational symmetry along the first direction. In some embodiments, the second surface of the second portion is substantially perpendicular to a central extension of the connecting portion. In some embodiments, the second surface of the second portion is substantially parallel to the second plane. In some embodiments, the second surface of the second portion is substantially flat and configured to form a contact area to the second tissue surface, and wherein the second portion further comprises a lower surface facing away from the first portion configured to taper towards the second end. In some embodiments, the second portion has a proximal region, wherein the proximal region extends from the first end to the connecting interface between the connecting portion and the second portion. In some embodiments, the lengthwise cross-sectional area of the second portion decreases continuously from an end of the intermediate region towards the first end. In some embodiments, the lengthwise cross-sectional area of the second portion decreases linearly from an end of the intermediate region towards the first end. In some embodiments, the lengthwise cross-sectional area of the second portion decreases stepwise from an end of the intermediate region towards the first end. In some embodiments, the proximal region of the second portion is conically shaped. In some embodiments, the first and second ends comprise an elliptical point respectively. In some embodiments, the first and second ends comprise a hemispherical end cap respectively. In some embodiments, the second portion has at least one circular cross-section along the length between the first and second end. In some embodiments, the second portion has at least one oval cross-section along the length between the first and second end. In some embodiments, the second portion has at least one elliptical cross-section along the length between the first and second end. In some embodiments, the second portion has said length in a direction being different to a central extension of the connecting portion. In some embodiments, the connecting interface between the connecting portion and the second portion is excentric with respect to the second portion. In some embodiments, the connecting interface between the connecting portion and the second portion is excentric, with respect to the second portion, in the first direction, but not in a second direction being perpendicular to the first direction. In some embodiments, the connecting interface between the connecting portion and the second portion is excentric, with respectto the second portion, in the first direction and in a second direction being perpendicular to the first direction. In some embodiments, the second direction is parallel to the second plane. In some embodiments, the proximal region and the distal region comprises the second surface configured to engage the second surface of the second side of the tissue portion. In some embodiments, the second portion is tapered from the first end to the second end. In some embodiments, the second portion is tapered from the intermediate region of the second portion to each of the first end and second end. In some embodiments, the first portion has a maximum dimension being in the range of 10 to 40 mm, such as in the range of 10 to 30 mm, such as in the range of 15 to 25 mm. In some embodiments, the first portion has a diameter being in the range of 10 to 40 mm, such as in the range of 10 to 30 mm, such as in the range of 15 to 25 mm. In some embodiments, the connecting portion has a maximum dimension in the third plane in the range of 2 to 20 mm, such as in the range of 2 to 15 mm, such as in the range of 5 to 10 mm. In some embodiments, the second portion has a maximum dimension being in the range of 30 to 90 mm, such as in the range of 30 to 70 mm, such as in the range of 35 to 60 mm. In some embodiments, the first portion has one or more of a spherical shape, an ellipsoidal shape, a polyhedral shape, an elongated shape, and a flat disk shape. In some embodiments, the connecting portion has one of an oval cross-section, an elongated cross-section, and a circular cross- section, in a plane parallel to the third plane. In some embodiments, the distal region is configured to be directed downwards in a standing patient. In some embodiments, the first portion has a first height, and the second portion has a second height, both heights being in a direction perpendicular to the first and second planes, wherein the first height is smaller than the second height. In some embodiments, the first height is less than 2/3 of the second height, such as less than 1/2 of the second height, such as less than 1/3 of the second height. In some embodiments, the second end of the second portion comprises connections for connecting to an implant being located in a caudal direction from a location of the implantable energized medical device in the patient. In some embodiments, the first end of the second portion comprises connections for connecting to an implant being located in a cranial direction from a location of the implantable energized medical device in the patient. In some embodiments, the connecting portion further comprises a fourth cross-sectional area in a fourth plane, wherein the fourth plane is parallel to the first, second and third planes, and wherein the third cross-sectional area is smaller than the fourth cross- sectional area. In some embodiments, the connecting portion comprises a protruding element comprising the fourth cross-sectional area. In some embodiments, the first surface is configured to engage the first tissue surface of the first side of the tissue portion. In some embodiments, the first portion comprises a first wireless energy receiver configured to receive energy transmitted wirelessly from an external wireless energy transmitter. In some embodiments, the first portion comprises an internal wireless energy transmitter. In some embodiments, the second portion comprises a second wireless energy receiver. In some embodiments, the first portion comprises a first energy storage unit. In some embodiments, the second portion comprises a second energy storage unit. In some embodiments, at least one of the first and second energy storage unit is a solid-state battery. In some embodiments, the solid-state battery is a thionyl-chloride battery. In some embodiments, the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter, and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. In some embodiments, the first portion comprises a first controller comprising at least one processing unit. In some embodiments, the second portion comprises a second controller comprising at least one processing unit. In some embodiments, at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device. In some embodiments, the first controller is connected to a first wireless communication receiver in the first portion forreceiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion. In some embodiments, the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion. In some embodiments, the first wireless energy receiver comprises a first coil and the internal wireless energy transmitter comprises a second coil. In some embodiments, the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion. In some embodiments, at least one of the coils are embedded in a ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least thesecond portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the implantable energized medical device further comprises at least one sensor for providing input to at least one of the first and second controller. In some embodiments, the sensor is a sensor configured to sense a physical parameter of the implantable energized medical device. In some embodiments, the sensor is a sensor configured to sense at least one of: a temperature of the implantable energized medical device or of a body engaging portion, a parameter related to the power consumption of the implantable energized medical device or of a body engaging portion, a parameter related to a status of at least one of the first and second energy storage unit, a parameter related to the wireless transfer of energy from a source external to the body of the patient, and a hydraulic pressure. In some embodiments, the sensor is a sensor configured to sense a physiological parameter of the patient. In some embodiments, the sensor is a sensor configured to sense at least one of: a parameter related to the patient swallowing, a local temperature, a systemic temperature, blood saturation, blood oxygenation, blood pressure, a parameter related to an ischemia marker, and pH. In some embodiments, the sensor configured to sense a parameter related to the patient swallowing comprises at least one of: a motility sensor, a sonic sensor, an optical sensor, and a strain sensor. In some embodiments, the sensor configured to sense pH is configured to sense the acidity in the stomach. In some embodiments, the controller is configured to transmit information based on sensor input to a device external to the body of the patient. In some embodiments, the second portion comprises at least a portion of an operation device for operating an implantable body engaging portion. In some embodiments, the second portion comprises at least one electrical motor. In some embodiments, the second portion comprises a transmission configured to reduce the velocity and increase the force of the movement generated by the electrical motor. In some embodiments, the transmission is configured to transfer a week force with a high velocity into a stronger force with lower velocity. In some embodiments, the transmission is configured to transfer a rotating force into a linear force. In some embodiments, the transmission comprises a gear system. In some embodiments, the second portion comprises a magnetic coupling for transferring mechanical work from the electrical motor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housing enclosing at least the second portion. In some embodiments, the second portion comprises at least one hydraulic pump. In some embodiments, the hydraulic pump comprises a pump comprising at least one compressible hydraulic reservoir. In some embodiments, the implantable energized medical device further comprises a capacitor connected to at least one of the first and second energy storage unit and connected to the electrical motor, wherein the capacitor is configured to: be charged by at least one of the first and second energy storage units, and provide the electrical motor with electrical power. In some embodiments, at least one of the first and second portion comprises a sensation generator adapted to generate a sensation detectable by a sense of the patient. In some embodiments, the second portion comprises a force transferring element configured to mechanically transfer force from the second portion to an implanted body engaging portion. In some embodiments, the second portion comprises a force transferring element configured to hydraulically transfer force from the second portion to an implanted body engaging portion. In some embodiments, the second portion comprises at least one lead for transferring electrical energy and/or information from the second portion to an implanted body engaging portion. In some embodiments, the first portion comprises an injection port for injecting fluid into the first portion. In some embodiments, the connecting portion comprises a conduit for transferring a fluid from the first portion to the second portion. In some embodiments, the conduit is arranged to extend through the hollow portion of the connecting portion. In some embodiments, the second portion comprises a first and a second chamber separated from each other, wherein the first chamber comprises a first liquid and the second chamber comprises a second liquid, and wherein the second liquid is a hydraulic liquidconfigured to transfer force to an implantable element configured to exert force on the body portion of the patient. In some embodiments, a wall portion of the first chamber is resilient to allow an expansion of the first chamber. In some embodiments, the second portion comprises a first hydraulic system in fluid connection with a first hydraulically operable implantable element configured to exert force on the body portion of the patient, and a second hydraulic system in fluid connection with a second hydraulically operable implantable element configured to exert force on the body portion of the patient, wherein the first and second hydraulically operable implantable elements are adjustable independently from each other. In some embodiments, the first hydraulic system comprises a first hydraulic pump and the second hydraulic systems comprises a second hydraulic pump. In some embodiments, each of the first and second hydraulic systems comprises a reservoir for holding hydraulic fluid. In some embodiments, the implantable energized medical device further comprises a first pressure sensor configured to sense a pressure in the first hydraulic system, and a second pressure sensor configured to sense a pressure in the second hydraulic system. In some embodiments, the first surface is configured to engage the first tissue surface of the first side of the tissue portion. In some embodiments, the first, second and third planes are parallel to a major extension plane of the tissue. In some embodiments, the fourth plane is parallel to a major extension plane of the tissue. According to an embodiment of the present inventive concept, an implantable device for exerting a force on a body portion of a patient is provided, the implantable device comprising: an implantable energized medical device and an implantable element configured to exert a force on a body portion of the patient. In some embodiments, the implantable element configured to exert a force on a body portion of the patient is an implantable hydraulic constriction device. In some embodiments, the implantable hydraulic constriction device is configured for constricting a luminary organ of the patient. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting an intestine of the patient. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting a colon or rectum of the patient. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting the intestine at a region of a stoma of the patient. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device forconstricting a blood vessel of the patient. In some embodiments, the implantable hydraulic constriction device for constricting a blood vessel of the patient is configured to constrict the venous blood flow leading from an erectile tissue for promoting the engorgement of the erectile tissue. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting a vas deference of the patient. In some embodiments, the implantable element configured to exert a force on a body portion of the patient is an implantable element for actively emptying the urinary bladder of the patient. In some embodiments, the implantable element for actively emptying the urinary bladder of the patient is configured to empty the bladder of the patient by compressing the urinary bladder from the outside thereof. In some embodiments, the implantable element configured to exert a force on a body portion of the patient is an implantableelement for actively stretching a stomach wall of the patient to create a feeling of satiety. An implantable energized medical device configured to be held in position by a tissue portion of a patient is provided, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of thesecond side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross- sectional area is smaller than the first and second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, and the first portion is configured to be movable in relation to the connecting portion, and/or comprises a first element and a second element, the first element being configured to be moved in relation to the second element to increase an area of the first surface. In some embodiments, the connecting portion is configured to extend along a central extension between the first portion and the second portion, and wherein the first portion is configured to be moveable to assume several positions along a direction perpendicular to the central extension. In some embodiments, the first portion is configured to be fixed in the several positions by a locking mechanism arranged on either or both of the first portion and connecting portion. In some embodiments, the first element is configured to assume a first state, wherein the first element is arranged on top of the second element or within the second element, and a second state, wherein the first element is arranged adjacent to the second element. In some embodiments, the first element is hingedly connected to the second element. In some embodiments, the first element and the second element are integrally formed, and wherein the first portion is flexible to allow the first element to fold over the second element to assume the first state. In some embodiments, the second element comprises a slot, and wherein the first element is configured to be partially or fullyhoused within the slot in the first state, and wherein the first element is configured to protrude from the slot in the second state. In some embodiments, the first element comprises a slot, and wherein the second element is configured to be partially or fullyhoused within the slot in a first state of the second element, and wherein the second element is configured to protrude from the slot in a second state of the second element. In some embodiments, the first element is configured to rotate about an axis being parallel to said central extension. In some embodiments, the first element is configured to rotate up to a maximum of 180 degrees about the axis. In some embodiments, the first element is configured to rotate up to a maximum of 90 degrees about the axis. In some embodiments, the second element is configured to be connected to the connecting portion. In some embodiments, the first element is configured to be moved in relation to the second element to protrude or to further protrude beyond an edge of the second element to increase an area of the first surface. In some embodiments, the second element is movable in relation to the first element to increase an area of the first surface. In some embodiments, the first element and the second element are configured to be moved from a first state, wherein ends ofthe first and second elements respectively point in a direction substantially perpendicular to the first plane, to a second state, wherein said ends of the first and second ends point in one or more directions being substantially parallel to the first plane. In some embodiments, the first element and the second element are configured to assume an upright position extending away from the connecting portion, and to be moved towards a sideways position being substantially perpendicular to the upright position. In some embodiments, the connecting portion comprises a protruding element and the first portion comprises a slot, wherein the protruding element is configured to slide within the slot along a predetermined path. In some embodiments, the protruding element is configured to be interlocked within the slot such that the protruding element can only be removed from the slot in a preconfigured position. In some embodiments, the protruding element is configured to be interlocked within the slot such that the protruding element is permanently enclosed within the slot, or wherein the protruding element is configured to be interlocked within the slot such that the protruding element is permanently enclosed within the slot. In some embodiments, the connecting portion further comprises a fourth cross-sectional area in a fourth plane, wherein the fourth plane is parallel to the first, second and third planes, and wherein the third cross-sectional area is smaller than the fourth cross- sectional area. In some embodiments, the connecting portion comprises a protruding element comprising the fourth cross-sectional area. In some embodiments, the connecting portion comprises a flange comprising the fourth cross-sectional area, such that the flange is prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes. In some embodiments, the flange protrudes in a direction parallel to the first, second, third and fourth planes, and perpendicular to a central extension of the connecting portion. In some embodiments, the flange comprises the third surface configured to engage the first tissue surface of the first side of the tissue portion. In some embodiments, the first portion comprises a first wireless energy receiver configured to receive energy transmitted wirelessly from an external wireless energy transmitter. In some embodiments, the first portion comprises an internal wireless energy transmitter. In some embodiments, the second portion comprises a second wireless energy receiver. In some embodiments, the first portion comprises a first energy storage unit. In some embodiments, the second portion comprises a second energy storage unit. In some embodiments, at least one of the first and second energy storage unit is a solid-state battery. In some embodiments, the solid-state battery is a thionyl-chloride battery. In some embodiments, the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter, and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. In some embodiments, the first portion comprises a first controller comprising at least one processing unit. In some embodiments, the second portion comprises a second controller comprising at least one processing unit. In some embodiments, at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device. In some embodiments, the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, and the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion. In some embodiments, the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion. In some embodiments, the first wireless energy receiver comprises a first coil and the internal wireless energy transmitter comprises a second coil. In some embodiments, the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion. In some embodiments, at least one of the coils are embedded in a ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the implantable energized medical device further comprises at least one sensor for providing input to at least one of the first and second controller. In some embodiments, the sensor is a sensor configured to sense a physical parameter of the implantable energized medical device. In some embodiments, the sensor is a sensor configured to sense at least one of: a temperature of the implantable energized medical device or of a body engaging portion, a parameter related to the power consumption of the implantable energized medical device or of a body engaging portion, a parameter related to a status of at least one of the first and second energy storage unit, a parameter related to the wireless transfer of energy from a source external to the body of the patient, and a hydraulic pressure. In some embodiments, the sensor is a sensor configured to sense a physiological parameter of the patient. In some embodiments, the sensor is a sensor configured to sense at least one of: a parameter related to the patient swallowing, a local temperature, a systemic temperature, blood saturation, blood oxygenation, blood pressure, a parameter related to an ischemia marker, and pH. In some embodiments, the sensor configured to sense a parameter related to the patient swallowing comprises at least one of: amotility sensor, a sonic sensor, an optical sensor, and a strain sensor. In some embodiments, the sensor configured to sense pH is configured to sense the acidity in the stomach. In some embodiments, the controller is configured to transmit information based on sensor input to a device external to the body of the patient. In some embodiments, the second portion comprises at least a portion of an operation device for operating an implantable body engaging portion. In some embodiments, the second portion comprises at least one electrical motor. In some embodiments, the second portion comprises a transmission configured to reduce the velocity and increase the force of the movement generated by the electrical motor. In some embodiments, the transmission is configured to transfer a week force with a high velocity into a stronger force with lower velocity. In some embodiments, the transmission is configured to transfer a rotating force into a linear force. In some embodiments, the transmission comprises a gear system. In some embodiments, the second portion comprises a magnetic coupling for transferring mechanical work from the electricalmotor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housingenclosing at least the second portion. In some embodiments, the second portion comprises at least one hydraulic pump. In some embodiments, the hydraulic pump comprises a pump comprising at least one compressible hydraulic reservoir. In some embodiments, the implantable energized medical device further comprises a capacitor connected to at least one of the first and second energy storage unit and connected to the electrical motor, wherein the capacitor is configured to: be charged by at least one of the first and second energy storage units, and provide the electrical motor with electrical power. In some embodiments, at least one of the first and second portion comprises a sensation generator adapted to generate a sensation detectable by a sense of the patient. In some embodiments, the second portion comprises a force transferring element configured to mechanically transfer force from the second portion to an implanted body engaging portion. In some embodiments, the second portion comprises a force transferring element configured to hydraulically transfer force from the second portion to an implanted body engaging portion. In some embodiments, the second portion comprises at least one lead for transferring electrical energy and/or information from the second portion to an implanted body engaging portion. In some embodiments, the first portion comprises an injection port for injecting fluid into the first portion. In some embodiments, the connecting portion comprises a conduit for transferring a fluid from the first portion to the second portion. In some embodiments, the conduit is arranged to extend through the hollow portion of the connecting portion. In some embodiments, the second portion comprises a first and a second chamber separated from each other, wherein the first chamber comprises a first liquid and the second chamber comprises a second liquid, and wherein the second liquid is a hydraulic liquid configured to transfer force to an implantable element configured to exert force on the body portion of the patient. In some embodiments, a wall portion of the first chamber is resilient to allow an expansion of the first chamber. In some embodiments, the second portion comprises a first hydraulic system in fluid connection with a first hydraulically operable implantable element configured to exert force on the body portion of the patient, and a second hydraulic system in fluid connection with a second hydraulically operable implantable element configured to exert force on the body portion of the patient, wherein the first and second hydraulically operable implantable elements are adjustable independently from each other. In some embodiments, the first hydraulic system comprises a first hydraulic pump and the second hydraulic systems comprises a second hydraulic pump. In some embodiments, each of the first and second hydraulic systems comprises a reservoir for holding hydraulic fluid. In some embodiments, the implantable energized medical device further comprises a first pressure sensor configured to sense a pressure in the first hydraulic system, and a second pressure sensor configured to sense a pressure in the second hydraulic system. In some embodiments, the first surface is configured to engage the first tissue surface of the first side of the tissue portion. In some embodiments, the first, second and third planes are parallel to a major extension plane of the tissue. In some embodiments, the fourth plane is parallel to a major extension plane of the tissue. In some embodiments, the third cross-sectional area is smaller than the first cross-sectional area. In some embodiments, the third cross-sectional area is equal to or larger than the first cross-sectional area. An implantable device for exerting a force on a body portion of a patient is provided, the device comprising: an implantable energized medical device, and an implantable element configured to exert a force on a body portion of the patient. In some embodiments, the implantable element configured to exert a force on a body portion of the patient is an implantable hydraulic constriction device. In some embodiments, the implantable hydraulic constriction device is configured for constricting a luminary organ of the patient. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting an intestine of the patient. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting a colon or rectum of the patient. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting the intestine at a region of a stoma of the patient. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting a blood vessel of the patient. In some embodiments, the implantable hydraulic constriction device for constricting a blood vessel of the patient is configured to constrict the venous blood flow leading from an erectile tissue for promoting the engorgement of the erectile tissue. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting a vas deference of the patient. In some embodiments, the implantable element configured to exert a force on a body portion of the patient is an implantable element for actively emptying the urinary bladder of the patient. In some embodiments, the implantable element for actively emptying the urinary bladder of the patient is configured to empty the bladder of the patient by compressing the urinary bladder from the outside thereof. In some embodiments, the implantable element configured to exert a force on a body portion of the patient is an implantable element for actively stretching a stomach wall of the patient to create a feeling of satiety. An implantable energized medical device configured to be held in position by a tissue portion of a patient is provided, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a thirdsurface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross- sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion is configured to receive electromagnetic waves at a frequency above a frequency level, and/or to transmit electromagnetic wavesat a frequency below the frequency level, wherein the second portion is configured to receive and/or transmit electromagnetic waves at a frequency below the frequency level, and wherein the frequency level is 100 kHz. In some embodiments, wherein the first portion is configured to transmit electromagnetic waves at the frequency below the frequency level to the second portion. In some embodiments, the first portion is configured to transmit electromagnetic waves at the frequency above the frequency level to an external device. In some embodiments, the frequency level is 40 kHz or 20 kHz. In some embodiments, the electromagnetic waves comprise wireless energy and/or wireless communication. In some embodiments, the first portion comprises a first wireless energy receiver for receiving energy transmitted wirelessly by an external wireless energy transmitter above the frequency level, and an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion below the frequency level, and the second portion comprises a second wireless energy receiver configured to receive energy transmitted wirelessly by the internal wireless energy transmitter below the frequency level. In some embodiments, the first portion comprises a first controller comprising at least one processing unit. In some embodiments, the second portion comprises a second controller comprising at least one processing unit. In some embodiments, the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device above the frequency level, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion below the frequency level. In some embodiments, the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion below the frequency level. In some embodiments, the first portion comprises an outer casing made from a polymer material. In some embodiments, the outer casing forms a complete enclosure, such that electromagnetic waves received and transmittedby the first portion must travel through the casing. In some embodiments, the second portion comprises an outer casing made from titanium. In some embodiments, the outer casing forms a complete enclosure, such that electromagnetic waves received and transmitted by the second portion must travel through the casing. An implantable energized medical device configured to be held in position by a tissue portion of a patient is provided, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of thesecond side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured toconnect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross- sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion is configured to receive and/or transmit electromagnetic waves at a frequency below the frequency level, and wherein the frequency level is 100 kHz. In some embodiments, the second portion is configured to receive and/or transmit electromagnetic waves at a frequency below the frequency level. In some embodiments, the first portion is configured to transmit electromagnetic waves at the frequency below the frequency level to the second portion. In some embodiments, the first portion is configured to transmit electromagnetic waves at the frequency below the frequency level to an external device. In some embodiments, the frequency level is 40 kHz or 20 kHz. In some embodiments, the electromagnetic waves comprise wireless energy and/or wireless communication.In some embodiments, the first portion comprises a first wireless energy receiver for receiving energy transmitted wirelessly by an external wireless energy transmitter below the frequency level, and an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion below the frequency level, and the second portion comprises a second wireless energy receiver configured to receive energy transmitted wirelessly by the internal wireless energy transmitter below the frequency level. In some embodiments, the first portion comprises a first controller comprising at least one processing unit. In some embodiments, the second portion comprises a second controller comprising at least one processing unit. In some embodiments, the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device below the frequency level, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion below the frequency level. In some embodiments, the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion below the frequency level. In some embodiments, the first portion comprises an outer casing made from a polymer material. In some embodiments, the first portion comprises an outer casing made from titanium. In some embodiments, the outer casing forms a complete enclosure, such that electromagnetic waves received and transmitted by the first portion must travel through the casing. In some embodiments, the second portion comprises an outer casing made from titanium. In some embodiments, the outer casing forms a complete enclosure, such that electromagnetic waves received and transmitted by the second portion must travel through the casing. An implantable energized medical device configured to be held in position by a tissue portion of a patient is provided, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured toconnect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross- sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion is made from a polymer material, the second portion comprises a casing made from titanium, wherein the casing forms a complete enclosure. In some embodiments, the casing of the second portion forms a complete enclosure such that the entirety of the outer surface of the second portion is covered by the casing, when the second portion is connected to the connecting portion. In some embodiments, the first portion comprises a casing made from the polymer material. In some embodiments, the casing of the first portion forms a complete enclosure such that the entirety of the outer surface of the first portion is covered by the casing. In some embodiments, the connecting portion comprises a connection arranged to connect to the first and second portion respectively and carry electrical signals and/or energy. In some embodiments, the connection is arranged in a core of the connecting portion such that it is encapsulated by outer material of the connecting portion. In some embodiments, the connecting portion comprises a ceramic material. In some embodiments, the connection is encapsulated within the ceramic material. In some embodiments, the first portion comprises a first connection configured to connect to the connection of the connecting portion. In some embodiments, the second portion comprises a second connection configured to connect to the connection of the connection portion. In some embodiments, the casing of the second portion is hermetically sealed. In some embodiments, the second connection is arranged such that the hermetical seal of the second portion is kept intact. In some embodiments, the casing of the first portion is hermetically sealed. An implantable energized medical device configured to be held in position by a tissue portion of a patient is provided, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a thirdsurface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross- sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, and wherein the connecting portion is configured to extend between the first portion and the second portion along a central extension axis, andwherein the second portion is configured to extend in a length direction being divergent with the central extension axis, and wherein the connecting portion has a substantially constant cross-sectional area along the central extension axis, or wherein the connecting portion has a decreasing cross-sectional area in a direction from the first portion towards the second portion along the central extension axis, and/or wherein the second portion has a substantially constant cross-sectional area along the length direction, or wherein the second portion has a decreasing cross-sectional area in the length direction. In some embodiments, the third cross-sectional area is smaller than the first cross-sectional area. In some embodiments, the connecting portion is tapered in the direction from the first portion towards the second portion along the central extension axis. In some embodiments, the connecting portion has a circular or oval cross-section along the central extension axis with adecreasing diameter in the direction from the first portion towards the second portion. In some embodiments, the second portion is tapered in the length direction. In some embodiments, the connecting portion has a circular or oval cross-section in the length direction with a decreasing diameter in the length direction. In some embodiments, the length direction extends from an interface between the connecting portion and the second portion towards an end of the second portion. In some embodiments, the length direction extends in a direction substantially perpendicular to the central extension axis. In some embodiments, the connecting portion comprises a protruding element and the first portion comprises a slot, wherein the protruding element is configured to slide within the slot along a predetermined path. In some embodiments, the protruding element is configured to be interlocked within the slot such that the protruding element can only be removed from the slot in a preconfigured position. In some embodiments, the protruding element is configured to be interlocked within the slot such that the protruding element is permanently enclosed within the slot, or wherein the protruding element is configured to be interlocked within the slot such that the protruding element is permanently enclosed within the slot. In some embodiments, the connecting portion further comprises a fourth cross-sectional area in a fourth plane, wherein the fourth plane is parallel to the first, second and third planes, and wherein the third cross-sectional area is smaller than the fourth cross- sectional area. In some embodiments, the connecting portion comprises a protruding element comprising the fourth cross-sectional area. In some embodiments, the connecting portion comprises a flange comprising the fourth cross-sectional area, such that the flange is prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes. In some embodiments, the flange protrudes in a direction parallel to the first, second, third and fourth planes, and perpendicular to a central extension of the connecting portion. In some embodiments, the flange comprises the third surface configured to engage the first tissue surface of the first side of the tissue portion. In some embodiments, the first portion comprises a first wireless energy receiver configured to receive energy transmitted wirelessly from an external wireless energy transmitter. In some embodiments, the first portion comprises an internal wireless energy transmitter. In some embodiments, the second portion comprises a second wireless energy receiver. In some embodiments, the first portion comprises a first energy storage unit. In some embodiments, the second portion comprises a second energy storage unit. In some embodiments, at least one of the first and second energy storage unit is a solid-state battery. In some embodiments, the solid-state battery is a thionyl-chloride battery. In some embodiments, the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter, and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. In some embodiments, the first portion comprises a first controller comprising at least one processing unit. In some embodiments, the second portion comprises a second controller comprising at least one processing unit. In some embodiments, at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device. In some embodiments, the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion. In some embodiments, the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion. In some embodiments, the first wireless energy receiver comprises a first coil and the internal wireless energy transmitter comprises a second coil. In some embodiments, the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion. In some embodiments, at least one of the coils are embedded in a ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the implantable energized medical device further comprises at least one sensor for providing input to at least one of the first and second controller. In some embodiments, the sensor is a sensor configured to sense a physical parameter of the implantable energized medical device. In some embodiments, the sensor is a sensor configured to sense at least one of: a temperature of the implantable energized medical device or of a body engaging portion, a parameter related to the power consumption of the implantable energized medical device or of a body engaging portion, a parameter related to a status of at least one of the first and second energy storage unit, a parameter related to the wireless transfer of energy from a source external to the body of the patient, and a hydraulic pressure. In some embodiments, the sensor is a sensor configured to sense a physiological parameter of the patient. In some embodiments, sensor is a sensor configured to sense at least one of: a parameter related to the patient swallowing, a local temperature, a systemic temperature, blood saturation, blood oxygenation, blood pressure, a parameter related to an ischemia marker, and pH. In some embodiments, the sensor configured to sense a parameter related to the patient swallowing comprises at least one of: a motility sensor, a sonic sensor, an optical sensor, and a strain sensor. In some embodiments, the sensor configured to sense pH is configured to sense the acidity in the stomach. In some embodiments, the controller is configured to transmit information based on sensor input to a device external to the body of the patient. In some embodiments, the second portion comprises at least a portion of an operation device for operating an implantable body engaging portion. In some embodiments, the second portion comprises at least one electrical motor. In some embodiments, the second portion comprises a transmission configured to reduce the velocity and increase the force of the movement generated by the electrical motor. In some embodiments, the transmission is configured to transfer a week force with a high velocity into a stronger force with lower velocity. In some embodiments, the transmission is configured to transfer a rotating force into a linear force. In some embodiments, the transmission comprises a gear system. In some embodiments, the second portion comprises a magnetic coupling for transferring mechanical work from the electricalmotor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housing enclosing at least the second portion. In some embodiments, the second portion comprises at least one hydraulic pump. In some embodiments, the hydraulic pump comprises a pump comprising at least one compressible hydraulic reservoir. In some embodiments, the implantable energized medical device further comprises a capacitor connected to at least one of the first and second energy storage unit and connected to the electrical motor, wherein the capacitor is configured to: be charged by at least one of the first and second energy storage units, and provide the electrical motor with electrical power. In some embodiments, at least one of the first and second portion comprises a sensation generator adapted to generate a sensation detectable by a sense of the patient. In some embodiments, the second portion comprises a force transferring element configured to mechanically transfer force from the second portion to an implanted body engaging portion. In some embodiments, the second portion comprises a force transferring element configured to hydraulically transfer force from the second portion to an implanted body engaging portion. In some embodiments, the second portion comprises at least one lead for transferring electrical energy and/or information from the second portion to an implanted body engaging portion. In some embodiments, the first portion comprises an injection port for injecting fluid into the first portion. In some embodiments, the connecting portion comprises a conduit for transferring a fluid from the first portion to the second portion. In some embodiments, the conduit is arranged to extend through the hollow portion of the connecting portion. In some embodiments, the second portion comprises a first and a second chamber separated from each other, wherein the first chamber comprises a first liquid and the second chamber comprises a second liquid, and wherein the second liquid is a hydraulic liquidconfigured to transfer force to an implantable element configured to exert force on the body portion of the patient. In some embodiments, a wall portion of the first chamber is resilient to allow an expansion of the first chamber. In some embodiments, the second portion comprises a first hydraulic system in fluid connection with a first hydraulically operable implantable element configured to exert force on the body portion of the patient, and a second hydraulic system in fluid connection with a second hydraulically operable implantable element configured to exert force on the body portion of the patient, wherein the first and second hydraulically operable implantable elements are adjustable independently from each other. In some embodiments, the first hydraulic system comprises a first hydraulic pump and the second hydraulic systems comprises a second hydraulic pump. In some embodiments, each of the first and second hydraulic systems comprises a reservoir for holding hydraulic fluid. In some embodiments, the implantable energized medical device further comprises a first pressure sensor configured to sense a pressure in the first hydraulic system, and a second pressure sensor configured to sense a pressure in the second hydraulic system. In some embodiments, the first surface is configured to engage the first tissue surface of the first side of the tissue portion. In some embodiments, the first, second and third planes are parallel to a major extension plane of the tissue. In some embodiments, the fourth plane is parallel to a major extension plane of the tissue. In some embodiments, the third cross-sectional area is smaller than the first cross-sectional area. In some embodiments, the third cross-sectional area is equal to or larger than the first cross-sectional area. An implantable device for exerting a force on a body portion of a patient is provided, the device comprising: an implantable energized medical device, an implantable element configured to exert a force on a body portion of the patient. In some embodiments, the implantable element configured to exert a force on a body portion of the patient is an implantable hydraulic constriction device. In some embodiments, the implantable hydraulic constriction device is configured for constricting a luminary organ of the patient. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting an intestine of the patient. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting a colon or rectum of the patient. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting the intestine at a region of a stoma of the patient. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting a blood vessel of the patient. In some embodiments, the implantable hydraulic constriction device for constricting a blood vessel of the patient is configured to constrict the venous blood flow leading from an erectile tissue for promoting the engorgement of the erectile tissue. In some embodiments, the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting a vas deference of the patient. In some embodiments, the implantable element configured to exert a force on a body portion of the patient is an implantable element for actively emptying the urinary bladder of the patient. In some embodiments, the implantable element for actively emptying the urinary bladder of the patient is configured to empty the bladder of the patient by compressing the urinary bladder from the outside thereof. In some embodiments, the implantable element configured to exert a force on a body portion of the patient is an implantable element for actively stretching a stomach wall of the patient to create a feeling of satiety. ASPECT_377-Electro_Subcutaneous_Control_Pop-Rivet2_Bellows According to an embodiment of the inventive concept, an implantable energized medical device configured to be held in position by a tissue portion of a patient is provided, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surfaceconfigured to engage a second tissue surface of the second side of the tissue portion, a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross- sectional area in a third plane and being configured to connect the first portion to the second portion, and a hermetic seal arrangement configured to enclose the connecting portion so as to prevent fluid from the patient to enter the connecting portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectionalareas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a directionperpendicular to the first, second and third planes, and the connecting portion comprises a flexible structure enabling the connecting portion to flex. In some embodiments, the flexible structure is configured to allow the connecting portion to flex in more than one direction. In some embodiments, the flexible structure is configured to allow the connecting portion to flex in all directions. In some embodiments, the flexible structure comprises a bellows. In some embodiments, the bellows is a metallic bellows. In some embodiments, the metallic bellows is welded. In some embodiments, the bellows is a titanium bellows. In some embodiments, the bellows form part of the hermetic seal arrangement. In some embodiments, the flexible structure comprises elevated and lowered portions enabling said flexing of the connecting portion. In some embodiments, the elevated and lowered portions are configured to enable the connecting portion to be compressed and/or expanded. In some embodiments, the flexible structure has a substantially cylindrical shape. In some embodiments, the flexible structure is configured to seal against the first portion and/or the second portion. In some embodiments, the connecting portion and the second portion are hermetically sealed from the first portion. In some embodiments, the hermetic seal arrangement encloses the connecting portion and the second portion so as to hermetically seal the connecting portion and the second portion from the first portion. In some embodiments, the first portion comprises a first wireless energy receiver for receiving energy transmitted wirelessly byan external wireless energy transmitter, and an internal wireless energy transmitter configured to transmit energy wirelessly to thesecond portion, and the second portion comprises a second wireless energy receiver configured to receive energy transmitted wirelessly by the internal wireless energy transmitter. In some embodiments, the first portion comprises a first energy storage unit connected to the first wireless energy receiver. In some embodiments, the second portion comprises a second energy storage unit connected to the second wireless energy receiver. In some embodiments, at least one of the first and second energy storage unit is a solid-state battery. In some embodiments, the solid-state battery is a thionyl-chloride battery. In some embodiments, the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. In some embodiments, the first portion comprises a first controller comprising at least one processing unit. In some embodiments, the second portion comprises a second controller comprising at least one processing unit. In some embodiments, at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device. In some embodiments, the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion. In some embodiments, the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion. In some embodiments, the first wireless energy receiver comprises a first coil and the wireless energy transmitter comprises a second coil. In some embodiments, the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion. In some embodiments, at least one of the coils are embedded in a ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the first portion is detachably connected to at least one of the second portion and the connecting portion. In some embodiments, the connecting portion comprising a flange having a flange area being larger than a cross-section area ofthe hole in the tissue portion, such that the flange is hindered from travelling through the hole in the tissue portion, such that the second portion and the connecting portion can be held in position by the tissue portion of the patient also when the first portion is disconnected from the connecting portion. In some embodiments, a connecting interface between the connecting portion and the second portion is excentric with respect to the second portion. In some embodiments, a connecting interface between the connecting portion and the first portion is excentric with respect to the first portion. In some embodiments, the second portion has a first end and a second end opposing the first end, wherein the second portion has a length between the first and second end. In some embodiments, the first end and second end are separated in a direction parallel to the second plane. In some embodiments, the first and second ends comprise an elliptical point respectively. In some embodiments, the first and second ends comprise a hemispherical end cap respectively. In some embodiments, the second portion has at least one circular cross-section along the length between the first and second end. In some embodiments, the second portion has at least one oval cross-section along the length between the first and second end. In some embodiments, the second portion has at least one elliptical cross-section along the length between the first and second end. In some embodiments, the implantable energized medical device further comprises a gear arrangement and an electric motor, wherein the gear arrangement is configured to reduce the velocity and increase the force of the movement generated by the electric motor. In some embodiments, the gear arrangement is configured to transfer a force with a high velocity into a stronger force with lower velocity. In some embodiments, the gear arrangement is configured to transfer a rotating force into a linear force. In some embodiments, the gear arrangement comprises a gear system. In some embodiments, the second portion comprises a magnetic coupling for transferring mechanical work from the electric motor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housing enclosing at least the second portion. In some embodiments, the second portion comprises at least one hydraulic pump. In some embodiments, the hydraulic pump comprises a pump comprising at least one compressible hydraulic reservoir. ASPECT_434_Electro_Subcutaneous_Control_Pop-Rivet2_Decreasing-Area According to an embodiment of the inventive concept, an implantable energized medical device configured to be held in positionby a tissue portion of a patient is provided, the medical device comprising: a first portion configured to be placed on a first side of the tissueportion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surfaceconfigured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, wherein the connecting portion and the second portion are configured to form a unit having a central axis extending from a first end of said unit to a second end of said unit, the first end being proximal to the first portion and the second end being distal to the first portion, wherein a physical footprint of said unit perpendicular to the central axis decreases continuously or stepwise from the first end to the second end of said unit. In some embodiments, said physical footprint comprises a cross-sectional area perpendicular to the central axis. In some embodiments, the connecting portion and the second portion are one of: configured to reversibly connect to each other to form said unit; or configured to irreversibly connect to each other to form said unit; or configured as a single body forming said unit. In some embodiments, said unit comprises an angled section forming a bend in said unit. In some embodiments, the bend is between 15° and 165°, such as between 30° and 150°, such as between 45° and 135°, such as substantially 90°. In some embodiments, the first portion comprises a first wireless energy receiver for receiving energy transmitted wirelessly byan external wireless energy transmitter, and an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion, and the second portion comprises a second wireless energy receiver configured to receive energy transmitted wirelessly by the internal wireless energy transmitter. In some embodiments, the first portion comprises a first energy storage unit connected to the first wireless energy receiver. In some embodiments, the second portion comprises a second energy storage unit connected to the second wireless energy receiver. In some embodiments, at least one of the first and second energy storage unit is a solid-state battery. In some embodiments, the solid-state battery is a thionyl-chloride battery. In some embodiments, the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. In some embodiments, the first portion comprises a first controller comprising at least one processing unit. In some embodiments, the second portion comprises a second controller comprising at least one processing unit. In some embodiments, at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device. In some embodiments, the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion. In some embodiments, the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion. In some embodiments, the first wireless energy receiver comprises a first coil and the wireless energy transmitter comprises a second coil. In some embodiments, the first portion comprises a combined coil, wherein the combined coil is configured to receive energywirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion. In some embodiments, at least one of the coils are embedded in a ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the implantable energized medical further comprises a housing configured to enclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the first portion is detachably connected to at least one of the second portion and the connecting portion. In some embodiments, the connecting portion comprising a flange having a flange area being larger than a cross-section area of the hole in the tissue portion, such that the flange is hindered from travelling through the hole in the tissue portion, such that the second portion and the connecting portion can be held in position by the tissue portion of the patient also when the first portion is disconnected from the connecting portion. In some embodiments, a connecting interface between the connecting portion and the second portion is excentric with respect to the second portion. In some embodiments, a connecting interface between the connecting portion and the first portion is excentric with respect to the first portion. In some embodiments, the second portion has a first end and a second end opposing the first end, wherein the second portion has a length between the first and second end. In some embodiments, the first end and second end are separated in a direction parallel to the second plane. In some embodiments, the first and second ends comprise an elliptical point respectively. In some embodiments, the first and second ends comprise a hemispherical end cap respectively. In some embodiments, the second portion has at least one circular cross-section along the length between the first and second end. In some embodiments, the second portion has at least one oval cross-section along the length between the first and second end. In some embodiments, the second portion has at least one elliptical cross-section along the length between the first and second end. In some embodiments, the implantable energized medical device further comprises a gear arrangement and an electric motor, wherein the gear arrangement is configured to reduce the velocity and increase the force of the movement generated by the electric motor. In some embodiments, the gear arrangement is configured to transfer a force with a high velocity into a stronger force with lower velocity. In some embodiments, the gear arrangement is configured to transfer a rotating force into a linear force. In some embodiments, the gear arrangement comprises a gear system. In some embodiments, the second portion comprises a magnetic coupling for transferring mechanical work from the electricmotor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housing enclosing at least the second portion. In some embodiments, the second portion comprises at least one hydraulic pump. In some embodiments, the hydraulic pump comprises a pump comprising at least one compressible hydraulic reservoir. According to an embodiment of the inventive concept, an implantable energized medical device configured to be held in position by a tissue portion of a patient is provided, the medical device comprising: a first portion configured to be placed on a first side of the tissueportion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surfaceconfigured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a thirdcross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, wherein the connecting portion is configured to extend between the first portion and the second portion alonga central extension axis, and wherein the second portion is configured to extend in a length direction being divergent with the central extension axis, and wherein the connecting portion has a decreasing cross-sectional area in a direction from the first portion towards the second portion along the central extension axis, wherein a largest cross-sectional area of the second portion in the length direction is smaller than a smallest cross-sectional area of the connecting portion in said direction from the first portion towards the second portion along the central extension axis, and wherein the second portion further has a decreasing cross-sectional area in the length direction from a first end of the second portion proximal to the connecting portion to a second end of the second portion distal to the connecting portion. ASPECT_435_Electro_Subcutaneous_Control_Pop-Rivet2_Electric-Motor-Orientation According to an embodiment of the inventive concept, an implantable energized medical device configured to be held in position by a tissue portion of a patient is provided, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross- sectional area in a third plane and being configured to connect the first portion to the second portion, and an electric motor, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectionalareas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a directionperpendicular to the first, second and third planes, at least part of the electric motor is arranged within the connecting portion. In some embodiments, the electric motor is arranged within the connecting portion within an imaginary boundary defined by the first surface of the first portion extending through the connecting portion. In some embodiments, the electric motor is arranged within the connecting portion within an imaginary boundary defined by the second surface of the second portion extending through the connecting portion. In some embodiments, the electric motor is fully arranged in the connecting portion within imaginary boundaries defined by the first surface of the first portion extending through the connecting portion and the second surface of the second portion extending through the connecting portion respectively. In some embodiments, the electric motor is arranged such that its longest dimension extends in a direction substantially perpendicular to the first, second and third cross-sectional areas. In some embodiments, the electric motor is arranged such that its longest dimension extends in a direction between the first portion and the second portion. In some embodiments, the worm drive is configured to transfer mechanical force from the electric motor to an implantable bodyengaging portion being external to the implantable energized medical device. In some embodiments, the electric motor extends through the connecting portion into the first portion and/or the second portion. In some embodiments, the electric motor extends through an imaginary boundary defined by the first surface of the first portion extending through the connecting portion. In some embodiments, the electric motor extends through an imaginary boundary defined by the second surface of the second portion extending through the connecting portion. In some embodiments, the electric motor extends through imaginary boundaries defined by the first surface of the first portion extending through the connecting portion and the second surface of the second portion extending through the connecting portion respectively. In some embodiments, the implantable energized medical device further comprises a gear arrangement operatively connected to the electric motor wherein the gear arrangement is partly or fully arranged in one of the first portion and the second portion. In some embodiments, the gear arrangement is arranged within the connecting portion within an imaginary boundary defined by the first surface of the first portion extending through the connecting portion. In some embodiments, the gear arrangement is arranged within the connecting portion within an imaginary boundary defined by the second surface of the second portion extending through the connecting portion. In some embodiments, the gear arrangement is fully arranged in the connecting portion within imaginary boundaries defined by the first surface of the first portion extending through the connecting portion and the second surface of the second portion extending through the connecting portion respectively. In some embodiments, the gear arrangement extends through the connecting portion into the first portion and/or the second portion. In some embodiments, the gear arrangement extends through an imaginary boundary defined by the first surface of the first portion extending through the connecting portion. In some embodiments, the gear arrangement extends through an imaginary boundary defined by the second surface of the second portion extending through the connecting portion. In some embodiments, the gear arrangement extends through imaginary boundaries defined by the first surface of the first portion extending through the connecting portion and the second surface of the second portion extending through the connecting portion respectively. In some embodiments, the gear arrangement is configured to transfer mechanical force from the electric motor to an implantable body engaging portion being external to the implantable energized medical device. In some embodiments, the gear arrangement is a worm drive or comprises a worm drive. In some embodiments, the first portion comprises a first wireless energy receiver for receiving energy transmitted wirelessly byan external wireless energy transmitter, and an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion, and the second portion comprises a second wireless energy receiver configured to receive energy transmitted wirelessly by the internal wireless energy transmitter. In some embodiments, the first portion comprises a first energy storage unit connected to the first wireless energy receiver. In some embodiments, the second portion comprises a second energy storage unit connected to the second wireless energy receiver. In some embodiments, at least one of the first and second energy storage unit is a solid-state battery. In some embodiments, the solid-state battery is a thionyl-chloride battery. In some embodiments, the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. In some embodiments, the first portion comprises a first controller comprising at least one processing unit. In some embodiments, the second portion comprises a second controller comprising at least one processing unit. In some embodiments, at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device. In some embodiments, the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion. In some embodiments, the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion. In some embodiments, the first wireless energy receiver comprises a first coil and the wireless energy transmitter comprises a second coil. In some embodiments, the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion. In some embodiments, at least one of the coils are embedded in a ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the first portion is detachably connected to at least one of the second portion and the connecting portion. In some embodiments, the connecting portion comprising a flange having a flange area being larger than a cross-section area of the hole in the tissue portion, such that the flange is hindered from travelling through the hole in the tissue portion, such that the second portion and the connecting portion can be held in position by the tissue portion of the patient also when the first portion is disconnected from the connecting portion. In some embodiments, a connecting interface between the connecting portion and the second portion is excentric with respect to the second portion. In some embodiments, a connecting interface between the connecting portion and the first portion is excentric with respect to the first portion. In some embodiments, the second portion has a first end and a second end opposing the first end, wherein the second portion has a length between the first and second end. In some embodiments, the first end and second end are separated in a direction parallel to the second plane. In some embodiments, the first and second ends comprise an elliptical point respectively. In some embodiments, the first and second ends comprise a hemispherical end cap respectively. In some embodiments, the second portion has at least one circular cross-section along the length between the first and second end. In some embodiments, the second portion has at least one oval cross-section along the length between the first and second end. In some embodiments, the second portion has at least one elliptical cross-section along the length between the first and second end. In some embodiments, the gear arrangement is configured to reduce the velocity and increase the force of the movement generated by the electric motor. In some embodiments, the gear arrangement is configured to transfer a force with a high velocity into a stronger force with lower velocity. In some embodiments, the gear arrangement is configured to transfer a rotating force into a linear force. In some embodiments, the gear arrangement comprises a gear system. In some embodiments, the second portion comprises a magnetic coupling for transferring mechanical work from the electric motor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housing enclosing at least the second portion. In some embodiments, the second portion comprises at least one hydraulic pump. In some embodiments, the hydraulic pump comprises a pump comprising at least one compressible hydraulic reservoir. ASPECT_436_Electro_Subcutaneous_Control_Pop-Rivet2_First-Portion According to an embodiment of the inventive concept, an implantable energized medical device configured to be held in position by a tissue portion of a patient is provided, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, the first portion being further configured to connect, directly or indirectly, to a second portion placed on a second side of the tissue portion opposing the first side, wherein the first portion comprises an internal wireless energy transmitter configured to transmit energywirelessly to the second portion. In some embodiments, the first portion is configured to connect, directly or indirectly, to the second portion, via a connectingportion configured to extend through a hole in the tissue portion, the hole extending between the first side of the tissue portion and the second side of the tissue portion. In some embodiments, the implantable energized medical device further comprises the connecting portion. In some embodiments, the connecting portion is integrally formed with the first portion. In some embodiments, the connecting portion is a separate component with regard to the first portion, the connecting portion being configured to be connected to the first portion. In some embodiments, the first portion has a first cross-sectional area in a first plane and the connecting portion has a second cross-sectional area in a second plane, wherein the first and second planes are parallel to each other, wherein the second cross-sectional area is smaller than the first cross-sectional area, such that the first portion and the second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first and second planes. In some embodiments, the first portion is configured to detachably connect, directly or indirectly, to the second portion. In some embodiments, the first portion comprises a first wireless energy receiver for receiving energy transmitted wirelessly by an external wireless energy transmitter. In some embodiments, the first portion comprises a first energy storage unit connected to the first wireless energy receiver. In some embodiments, the first energy storage unit is a solid-state battery. In some embodiments, the solid-state battery is a thionyl-chloride battery. In some embodiments, the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to a second wireless energy receiver in the second portion. In some embodiments, the first portion comprises a first controller comprising at least one processing unit. In some embodiments, the first controller is connected to a wireless transceiver for communicating wirelessly with an external device. In some embodiments, the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion. In some embodiments, the first wireless energy receiver comprises a first coil and the wireless energy transmitter comprises a second coil.In some embodiments, the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion. In some embodiments, at least one of the coils are embedded in a ceramic material. In some embodiments, the connecting portion comprises a flange having a flange area being larger than a cross-section area ofthe hole in the tissue portion, such that the flange is hindered from travelling through the hole in the tissue portion, such that the second portion and the connecting portion can be held in position by the tissue portion of the patient also when the first portion is disconnected from the connecting portion. In some embodiments, a connecting interface between the connecting portion and the first portion is excentric with respect to the first portion. ASPECT_437_Electro_Subcutaneous_Control_Pop-Rivet2_Remote-Parts A system is provided, the system comprising an implantable energized medical device configured to be held in position by a tissueportion of a patient, the medical device comprising: - a first portion configured to be placed on a first side of the tissue portion, the firstportion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of thefirst side of the tissue portion, - a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured toengage a second tissue surface of the second side of the tissue portion, and - a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes; a body engaging implant configured to at least one of stretch, contract, expand, stimulate, and exert a force on body tissue or a body organ; an implantable energy storage unit; an implantable reservoir configured to hold a fluid; an implantable pump configured to transfer fluid to and from the implantable reservoir and the body engaging implant respectively via a conduit; and an implantable electric motor connected to the implantable energy storage unit, the implantable electric motor being configured to operate the implantable pump; wherein the implantable energy storage unit, the implantable reservoir, the implantable pump and the implantable electric motor are arranged externally to the implantable energized medical device. A system is provided, the system comprising an implantable energized medical device configured to be held in position by a tissueportion of a patient, the medical device comprising: - a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface ofthe first side of the tissue portion, - a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surfaceconfigured to engage a second tissue surface of the second side of the tissue portion, - a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a thirdcross-sectional area in a third plane and being configured to connect the first portion to the second portion, and - an implantable energy storage unit arranged in the first portion, the connecting portion or the second portion; wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes; a body engaging implant configured to at least one of stretch, contract, expand, stimulate, and exert a force on body tissue or abody organ; an implantable reservoir configured to hold a fluid; an implantable pump configured to transfer fluid to and from the implantablereservoir and the body engaging implant respectively via a conduit; and an implantable electric motor connected to the implantable energy storage unit, the implantable electric motor being configured to operate the implantable pump; wherein the implantable reservoir, the implantable pump and the implantable electric motor are arranged externally to the implantable energized medical device. A system is provided, the system comprising an implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical devicecomprising: - a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional areain a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, - a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of thesecond side of the tissue portion, - a connecting portion configured to be placed through a hole in the tissue portion extending between thefirst and second sides of the tissue portion, the connecting portion having a third cross- sectional area in a third plane and being configuredto connect the first portion to the second portion, and - an implantable electric motor arranged in the first portion, the connecting portion or the second portion; wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes; a body engaging implant configured to at least one of stretch, contract, expand, stimulate, and exert a force on body tissue or a body organ; an implantable energy storage unit; an implantable reservoir configured to hold a fluid; an implantable pump configured to transfer fluid to and from the implantable reservoir and the body engaging implant respectively via a conduit; wherein the implantable electric motor is connected to the implantable energy storage unit, and the implantable electric motor is configured to operate the implantable pump; wherein the implantable energy storage unit, the implantable reservoir and the implantable pump are arranged externally to the implantable energized medical device. A system is provided, the system comprising an implantable energized medical device configured to be held in position by a tissueportion of a patient, the medical device comprising: - a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of thefirst side of the tissue portion, - a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured toengage a second tissue surface of the second side of the tissue portion, - a connecting portion configured to be placed through a hole in thetissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross- sectionalarea in a third plane and being configured to connect the first portion to the second portion, and - an implantable reservoir configured tohold a fluid, the implantable reservoir being arranged in the first portion, the connecting portion or the second portion wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes a body engaging implant configured to at least one of stretch, contract, expand, stimulate, and exert a force on body tissue or a body organ; an implantable energy storage unit; an implantable pump configured to transfer fluid to and from the reservoir and the body engaging implant respectively via a conduit; and an implantable electric motor connected to the implantable energy storage unit, the implantable electric motor being configured to operate the implantable pump; wherein the implantable energy storage unit, the implantable pump and the implantable electric motor are arranged externally to the implantable energized medical device. A system is provided, the system comprising an implantable energized medical device configured to be held in position by a tissueportion of a patient, the medical device comprising: - a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of thefirst side of the tissue portion, - a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured toengage a second tissue surface of the second side of the tissue portion, - a connecting portion configured to be placed through a hole in thetissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross- sectionalarea in a third plane and being configured to connect the first portion to the second portion, and - an implantable pump arranged in the first portion, the connecting portion or the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross- sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes; a body engaging implant configured to at least one of stretch, contract, expand, stimulate, and exert a force on body tissue or a body organ; an implantable energy storage unit; an implantable reservoir configured to hold a fluid; and an implantable electric motor connected to the implantable energy storage unit, the implantable electric motor being configured to operate the implantable pump; wherein the implantable pump is configured to transfer fluid to and from the implantable reservoir and the body engaging implant respectively via a conduit; wherein the implantableenergy storage unit, the implantable reservoir, and the implantable electric motor are arranged externally to the implantable energized medical device. A system is provided, the system comprising an implantable energized medical device configured to be held in position by a tissueportion of a patient, the medical device comprising: - a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of thefirst side of the tissue portion, - a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured toengage a second tissue surface of the second side of the tissue portion, and - a connecting portion configured to be placed through a hole inthe tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross- sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes; a body engaging implant configured to at least one of stretch, contract, expand, stimulate, and exert a force on body tissue or abody organ; an implantable energy storage unit; and an implantable electric motor connected to the implantable energy storage unit, theimplantable electric motor being configured to operate the body engaging implant; wherein the implantable energy storage unit and the implantable electric motor are arranged externally to the implantable energized medical device. A system is provided, the system comprising an implantable energized medical device configured to be held in position by a tissueportion of a patient, the medical device comprising: - a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of thefirst side of the tissue portion, - a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured toengage a second tissue surface of the second side of the tissue portion, - a connecting portion configured to be placed through a hole inthe tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross- sectionalarea in a third plane and being configured to connect the first portion to the second portion, - an implantable energy storage unit arrangedin the first portion, the connecting portion or the second portion, and - an implantable electric motor arranged in the first portion, the connecting portion or the second portion, the implantable electric motor being connected to the implantable energy storage unit, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross- sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes; a body engaging implant configured to at least one of stretch, contract,expand, stimulate, and exert a force on body tissue or a body organ; an implantable reservoir configured to hold a fluid; and an implantable pump configured to transfer fluid to and from the implantable reservoir and the body engaging implant respectively via a conduit; wherein the implantable electric motor is configured to operate the implantable pump; wherein the implantable reservoir and the implantable pump are arranged externally to the implantable energized medical device. A system is provided, the system comprising an implantable energized medical device configured to be held in position by a tissueportion of a patient, the medical device comprising: - a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of thefirst side of the tissue portion, - a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured toengage a second tissue surface of the second side of the tissue portion, - a connecting portion configured to be placed through a hole in thetissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross- sectionalarea in a third plane and being configured to connect the first portion to the second portion, - an implantable reservoir configured to hold afluid arranged in the first portion, the connecting portion or the second portion, and - an implantable electric motor arranged in the first portion, the connecting portion or the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross- sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes; a body engaging implant configured to at least one of stretch, contract, expand, stimulate, and exert a force on body tissue or a body organ; an implantable energy storage unit, and an implantable pump configured to transfer fluid to and from the implantable reservoir and the body engaging implant respectively via a conduit; wherein the implantable electric motor is connected to the implantable energy storage unit and configured tooperate the implantable pump; wherein the implantable energy storage unit and the implantable pump are arranged externally to theimplantable energized medical device. A system is provided, the system comprising an implantable energized medical device configured to be held in position by a tissueportion of a patient, the medical device comprising: - a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of thefirst side of the tissue portion, - a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured toengage a second tissue surface of the second side of the tissue portion, - a connecting portion configured to be placed through a hole in thetissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross- sectionalarea in a third plane and being configured to connect the first portion to the second portion, - an implantable reservoir configured to hold afluid, the implantable reservoir being arranged in the first portion, the connecting portion or the second portion, and - an implantable pumparranged in the first portion, the connecting portion or the second portion, wherein: the first, second, and third planes are parallel to eachother, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes; a body engaging implant configured to at least one of stretch, contract, expand, stimulate, and exert a force on body tissue or a body organ; an implantable energy storage unit; and an implantable electric motor connected to the implantable energy storage unit, the implantable electric motor being configured to operate the implantable pump; wherein the implantable pump is configured to transfer fluid to and from the implantable reservoir and the body engaging implant respectively via a conduit; and wherein the implantable energy storage unit and the implantable electric motor are arranged externally to the implantable energized medical device. A system is provided, the system comprising an implantable energized medical device configured to be held in position by a tissueportion of a patient, the medical device comprising: - a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of thefirst side of the tissue portion, - a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured toengage a second tissue surface of the second side of the tissue portion, - a connecting portion configured to be placed through a hole in thetissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross- sectionalarea in a third plane and being configured to connect the first portion to the second portion, - an implantable pump arranged in the firstportion, the connecting portion or the second portion, and - an implantable energy storage unit arranged in the first portion, the connecting portion or the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area issmaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes; a body engaging implant configured to at least one of stretch, contract, expand, stimulate, and exert a force on body tissue or a body organ; an implantable reservoir configured to hold a fluid; an implantable electric motor connected to the implantable energy storage unit, the implantable electric motor being configured to operate the implantable pump; wherein the implantable pump is configured to transfer fluid to and from the implantable reservoir and the body engaging implant respectively via a conduit wherein the implantable reservoir and the implantable electric motor are arranged externally to the implantable energized medical device. A system is provided, the system comprising an implantable energized medical device configured to be held in position by a tissueportion of a patient, the medical device comprising: - a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of thefirst side of the tissue portion, - a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured toengage a second tissue surface of the second side of the tissue portion, - a connecting portion configured to be placed through a hole in thetissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross- sectionalarea in a third plane and being configured to connect the first portion to the second portion, and - an implantable electric motor arranged inthe first portion, the connecting portion or the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes; a body engaging implant configured to at least one of stretch, contract, expand, stimulate, and exert a force on body tissue or a body organ; an implantable energy storage unit; wherein the implantable electric motor is connected to the implantable energy storage unit, theimplantable electric motor being configured to operate the body engaging implant; wherein the implantable energy storage unit is arranged externally to the implantable energized medical device. A system is provided, the system comprising an implantable energized medical device configured to be held in position by a tissueportion of a patient, the medical device comprising: - a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of thefirst side of the tissue portion, - a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured toengage a second tissue surface of the second side of the tissue portion, - a connecting portion configured to be placed through a hole in thetissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross- sectionalarea in a third plane and being configured to connect the first portion to the second portion, - an implantable energy storage unit arrangedin the first portion, the connecting portion or the second portion, - an implantable electric motor arranged in the first portion, theconnecting portion or the second portion, the implantable electric motor being connected to the implantable energy storage unit, and - an implantable reservoir configured to hold a fluid, the implantable reservoir being arranged in the first portion, the connecting portion or the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes; a body engaging implant configured to at least one of stretch, contract, expand, stimulate, and exert a force on body tissue or a body organ; an implantable pump configured to transfer fluid to and from the implantable reservoir and the body engaging implant respectively via a conduit; wherein the implantable electric motor is configured to operate the implantable pump; wherein the implantable pump is arranged externally to the implantable energized medical device. A system is provided, the system comprising an implantable energized medical device configured to be held in position by a tissueportion of a patient, the medical device comprising: - a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of thefirst side of the tissue portion, - a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured toengage a second tissue surface of the second side of the tissue portion, - a connecting portion configured to be placed through a hole in thetissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross- sectionalarea in a third plane and being configured to connect the first portion to the second portion, - an implantable reservoir configured to hold afluid arranged in the first portion, the connecting portion or the second portion, - an implantable electric motor arranged in the firstportion, the connecting portion or the second portion, and - an implantable pump arranged in the first portion, the connecting portion or the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes; a body engaging implant configured to at least one of stretch, contract, expand, stimulate, and exert a force on body tissue or a body organ; an implantable energy storage unit, and wherein theimplantable pump is configured to transfer fluid to and from the implantable reservoir and the body engaging implant respectively via aconduit; wherein the implantable electric motor is connected to the implantable energy storage unit and configured to operate the implantable pump; wherein the implantable energy storage unit is arranged externally to the implantable energized medical device. A system is provided, the system comprising an implantable energized medical device configured to be held in position by a tissueportion of a patient, the medical device comprising: - a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of thefirst side of the tissue portion, - a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured toengage a second tissue surface of the second side of the tissue portion, - a connecting portion configured to be placed through a hole in thetissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross- sectionalarea in a third plane and being configured to connect the first portion to the second portion, - an implantable reservoir configured to hold afluid, the implantable reservoir being arranged in the first portion, the connecting portion or the second portion, - an implantable pumparranged in the first portion, the connecting portion or the second portion, and - an implantable energy storage unit arranged in the first portion, the connecting portion or the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross- sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes; a body engaging implant configured to at least one of stretch, contract, expand, stimulate, and exert a force on body tissue or a body organ; an implantable electric motor connected to the implantable energy storage unit, the implantable electric motor being configured to operate the implantable pump; wherein the implantable pump is configured to transfer fluid to and from the implantable reservoir and the body engaging implant respectively via a conduit; and wherein the implantable electric motor is arranged externally to the implantable energized medical device. A system is provided, the system comprising an implantable energized medical device configured to be held in position by a tissueportion of a patient, the medical device comprising: - a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of thefirst side of the tissue portion, - a second portion configured to be placed on a second side of the tissue portion, the second side opposingthe first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured toengage a second tissue surface of the second side of the tissue portion, - a connecting portion configured to be placed through a hole in thetissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross- sectionalarea in a third plane and being configured to connect the first portion to the second portion, - an implantable pump arranged in the firstportion, the connecting portion or the second portion, - an implantable energy storage unit arranged in the first portion, the connectingportion or the second portion, and - an electric motor arranged in the first portion, the connecting portion or the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross- sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in adirection perpendicular to the first, second and third planes; a body engaging implant configured to at least one of stretch, contract, expand, stimulate, and exert a force on body tissue or a body organ; an implantable reservoir configured to hold a fluid; wherein the implantable electric motor is connected to the implantable energy storage unit, the implantable electric motor being configured to operate the implantable pump; wherein the implantable pump is configured to transfer fluid to and from the implantable reservoir and the body engaging implant respectively via a conduit wherein the implantable reservoir is arranged externally to the implantable energized medical device. A system is provided, the system comprising an implantable energized medical device configured to be held in position by a tissueportion of a patient, the medical device comprising: - a first portion configured to be placed on a first side of the tissue portion, the firstportion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of thefirst side of the tissue portion, - a second portion configured to be placed on a second side of the tissue portion, the second side opposingthe first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured toengage a second tissue surface of the second side of the tissue portion, - a connecting portion configured to be placed through a hole in thetissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross- sectionalarea in a third plane and being configured to connect the first portion to the second portion, and - an implantable energy storage unitarranged in the first portion, the connecting portion or the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes; a body engaging implant configured to at least one of stretch, contract, expand, stimulate, and exert a force on body tissue or a body organ; an implantable electric motor connected to the implantable energy storage unit, the implantable electric motor being configured to operate the body engaging implant; wherein the implantable electric motor is arranged externally to the implantable energized medical device. In some embodiments, the implantable energized medical device further comprises a first wireless communication receiverconfigured to receive communication signals from outside the patient’s body. In some embodiments, the implantable energized medical device further comprises a second wireless communication transmitter arranged in the second portion, wherein the second wireless communication transmitter is configured to transmit communication signals to the first wireless communication receiver. In some embodiments, the implantable energized medical device further comprises a first wireless communication transmitter arranged in the first portion, the first wireless communication transmitter being configured to transmit communication signals outside of the patient’s body. In some embodiments, the implantable energized medical device further comprises a second wireless communication receiver arranged in the second portion, wherein the first wireless communication transmitter is configured to transmit communication signals to the second wireless communication receiver. In some embodiments, the implantable energized medical device further comprises a wireless energy receiver configured to receive energy transmitted wirelessly from outside the patient’s body and deliver the received energy to the implantable energy storage unit. In some embodiments, the implantable energized medical device further comprises a control unit configured to control at least one of the body engaging implant, the implantable energy storage unit, the implantable pump, and the implantable electric motor. In some embodiments, the implantable electric motor is operatively connected to the implantable pump via a rotatable shaft. In some embodiments, the implantable electric motor is operatively connected to the implantable pump via a magnetic coupling. In some embodiments, the system further comprises a gear arrangement arranged in the implantable energized medical device and operatively connected to the electric motor, the gear arrangement being configured to reduce the velocity and increase the force of movement generated by the electric motor. In some embodiments, the system further comprises a gear arrangement arranged externally to the implantable energized medical device and operatively connected to the electric motor, the gear arrangement being configured to reduce the velocity and increase the force of movement generated by the electric motor. In some embodiments, the system further comprises a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the system further comprises a housing configured to enclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the first portion is detachably connected to at least one of the second portion and the connecting portion. In some embodiments, the connecting portion comprising a flange having a flange area being larger than a cross-section area ofthe hole in the tissue portion, such that the flange is hindered from travelling through the hole in the tissue portion, such that the second portion and the connecting portion can be held in position by the tissue portion of the patient also when the first portion is disconnected from the connecting portion. In some embodiments, a connecting interface between the connecting portion and the second portion is excentric with respect to the second portion. In some embodiments, a connecting interface between the connecting portion and the first portion is excentric with respect to the first portion. In some embodiments, the second portion has a first end and a second end opposing the first end, wherein the second portion has a length between the first and second end. In some embodiments, the first end and second end are separated in a direction parallel to the second plane. In some embodiments, the first and second ends comprise an elliptical point respectively. In some embodiments, the first and second ends comprise a hemispherical end cap respectively. In some embodiments, the second portion has at least one circular cross-section along the length between the first and second end. In some embodiments, the second portion has at least one oval cross-section along the length between the first and second end. In some embodiments, the second portion has at least one elliptical cross-section along the length between the first and second end. In some embodiments, the system further comprises a gear arrangement, wherein the gear arrangement is configured to reduce the velocity and increase the force of the movement generated by the electric motor. In some embodiments, the gear arrangement is configured to transfer a force with a high velocity into a stronger force withlower velocity. In some embodiments, the gear arrangement is configured to transfer a rotating force into a linear force. In some embodiments, the gear arrangement comprises a gear system. In some embodiments, the second portion comprises a magnetic coupling for transferring mechanical work from the electricmotor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housing enclosing at least the second portion. In some embodiments, the pump is an hydraulic pump. In some embodiments, the hydraulic pump comprises a pump comprising at least one compressible hydraulic reservoir. ASPECT_438_Electro_Subcutaneous_Control_Pop-Rivet2_Same-Shape-A According to an embodiment of the inventive concept, an implantable energized medical device configured to be held in position by a tissue portion of a patient is provided, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surfaceconfigured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion is configured to be placed subcutaneously in the patient, and wherein the first portion comprises a connecting interface arrangement for transferring wired energy and/or wired communication signals and/or fluid to an additional implant in the patient. In some embodiments, a height of the first portion measured in a plane perpendicular to the first plane is 15 mm or less, such as10 mm or less, such as 7 mm or less, such as 5 mm or less. In some embodiments, the connecting interface arrangement comprises a port for transferring fluid from the first portion to said additional implant. In some embodiments, the implantable energized medical device further comprises at least one conduit or tube for transferring said fluid, wherein the at least one conduit or tube is connected to the port. In some embodiments, the implantable energized medical device further comprises at least one wire for energy and/or communication signals connected to the connecting interface arrangement. In some embodiments, the height of the first portion is a maximum height. In some embodiments, the first portion comprises a first wireless energy receiver for receiving energy transmitted wirelessly by an external wireless energy transmitter, and an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion, and the second portion comprises a second wireless energy receiver configured to receive energy transmitted wirelessly by the internal wireless energy transmitter. In some embodiments, the first portion comprises a first energy storage unit connected to the first wireless energy receiver. In some embodiments, the second portion comprises a second energy storage unit connected to the second wireless energy receiver. In some embodiments, at least one of the first and second energy storage unit is a solid-state battery. In some embodiments, the solid-state battery is a thionyl-chloride battery. In some embodiments, the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the secondwireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. In some embodiments, the first portion comprises a first controller comprising at least one processing unit. In some embodiments, the second portion comprises a second controller comprising at least one processing unit. In some embodiments, at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device. In some embodiments, the first controller is connected to a first wireless communication receiver in the first portion forreceiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion. In some embodiments, the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion. In some embodiments, the first wireless energy receiver comprises a first coil and the wireless energy transmitter comprises a second coil. In some embodiments, the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion. In some embodiments, at least one of the coils are embedded in a ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the first portion is detachably connected to at least one of the second portion and the connecting portion. In some embodiments, the connecting portion comprising a flange having a flange area being larger than a cross-section area ofthe hole in the tissue portion, such that the flange is hindered from travelling through the hole in the tissue portion, such that the second portion and the connecting portion can be held in position by the tissue portion of the patient also when the first portion is disconnected from the connecting portion. In some embodiments, a connecting interface between the connecting portion and the second portion is excentric with respect to the second portion. In some embodiments, a connecting interface between the connecting portion and the first portion is excentric with respect to the first portion. In some embodiments, the second portion has a first end and a second end opposing the first end, wherein the second portion has a length between the first and second end. In some embodiments, the first end and second end are separated in a direction parallel to the second plane. In some embodiments, the first and second ends comprise an elliptical point respectively. In some embodiments, the first and second ends comprise a hemispherical end cap respectively. In some embodiments, the second portion has at least one circular cross-section along the length between the first and second end. In some embodiments, the second portion has at least one oval cross-section along the length between the first and second end. In some embodiments, the second portion has at least one elliptical cross-section along the length between the first and second end. In some embodiments, the implantable energized medical further comprises a gear arrangement and an electric motor, wherein the gear arrangement is configured to reduce the velocity and increase the force of the movement generated by the electric motor. In some embodiments, the gear arrangement is configured to transfer a force with a high velocity into a stronger force with lower velocity. In some embodiments, the gear arrangement is configured to transfer a rotating force into a linear force. In some embodiments, the gear arrangement comprises a gear system. In some embodiments, the second portion comprises a magnetic coupling for transferring mechanical work from the electricmotor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housing enclosing at least the second portion. In some embodiments, the second portion comprises at least one hydraulic pump. In some embodiments, the hydraulic pump comprises a pump comprising at least one compressible hydraulic reservoir. ASPECT_438_Electro_Subcutaneous_Control_Pop-Rivet2_Same-Shape-B According to an embodiment of the inventive concept, an implantable energized medical device configured to be held in position by a tissue portion of a patient is provided, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surfaceconfigured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, andthird planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion and the second portion are configured to be placed subcutaneously in the patient, such that the implantable energized medical device can be placed with either of the first portion and the second portion on the first side of the tissue portion. In some embodiments, a height of the second portion measured in a plane perpendicular to the second plane is 15 mm or less, such as 10 mm or less, such as 7 mm or less, such as 5 mm or less. In some embodiments, the first portion has a length in a plane parallel to the first plane, wherein the second portion has a length in a plane parallel to the second plane, and wherein the length of the first portion differ no more than 30% with regard to the length of the second portion, such as wherein the length of the first portion differ no more than 15% with regard to the length of the second portion, such as wherein the length of the first portion differ no more than 5% with regard to the length of the second portion, such as wherein the lengthof the first portion differ no more than 1% with regard to the length of the second portion. In some embodiments, the first portion has a width in a plane parallel to the first plane, wherein the second portion has a width in a plane parallel to the second plane, and wherein the width of the first portion differ no more than 30% with regard to the width of thesecond portion, such as wherein the width of the first portion differ no more than 15% with regard to the width of the second portion, suchas wherein the width of the first portion differ no more than 5% with regard to the width of the second portion, such as wherein the width of the first portion differ no more than 1% with regard to the width of the second portion. In some embodiments, the first portion has a height in a plane perpendicular to the first plane, and wherein the height of the first portion differ no more than 30% with regard to the height of the second portion, such as wherein the height of the first portion differ no more than 15% with regard to the height of the second portion, such as wherein the height of the first portion differ no more than 5% with regard to the height of the second portion, such as wherein the height of the first portion differ no more than 1% with regard to the height of the second portion. In some embodiments, a height of the first portion measured in a plane perpendicular to the first plane is 15 mm or less, such as 10 mm or less, such as 7 mm or less, such as 5 mm or less. In some embodiments, the first portion comprises a first wireless energy receiver for receiving energy transmitted wirelessly by an external wireless energy transmitter, and an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion, and the second portion comprises a second wireless energy receiver configured to receive energy transmitted wirelessly by the internal wireless energy transmitter. In some embodiments, the first portion comprises a first energy storage unit connected to the first wireless energy receiver. In some embodiments, the second portion comprises a second energy storage unit connected to the second wireless energy receiver. In some embodiments, at least one of the first and second energy storage unit is a solid-state battery. In some embodiments, the solid-state battery is a thionyl-chloride battery. In some embodiments, the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. In some embodiments, the first portion comprises a first controller comprising at least one processing unit. In some embodiments, the second portion comprises a second controller comprising at least one processing unit. In some embodiments, at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device. In some embodiments, the first controller is connected to a first wireless communication receiver in the first portion forreceiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion. In some embodiments, the second controller is connected to the second wireless communication receiver for receiving wirelesscommunication from the first portion. In some embodiments, the first wireless energy receiver comprises a first coil and the wireless energy transmitter comprises a second coil. In some embodiments, the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion. In some embodiments, at least one of the coils are embedded in a ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the first portion is detachably connected to at least one of the second portion and the connecting portion. In some embodiments, the connecting portion comprising a flange having a flange area being larger than a cross-section area ofthe hole in the tissue portion, such that the flange is hindered from travelling through the hole in the tissue portion, such that the second portion and the connecting portion can be held in position by the tissue portion of the patient also when the first portion is disconnected from the connecting portion. In some embodiments, a connecting interface between the connecting portion and the second portion is excentric with respect to the second portion. In some embodiments, a connecting interface between the connecting portion and the first portion is excentric with respect to the first portion. In some embodiments, the second portion has a first end and a second end opposing the first end, wherein the second portion has a length between the first and second end. In some embodiments, the first end and second end are separated in a direction parallel to the second plane. In some embodiments, the first and second ends comprise an elliptical point respectively. In some embodiments, the first and second ends comprise a hemispherical end cap respectively. In some embodiments, the second portion has at least one circular cross-section along the length between the first and second end. In some embodiments, the second portion has at least one oval cross-section along the length between the first and second end. In some embodiments, the second portion has at least one elliptical cross-section along the length between the first and second end. In some embodiments, the implantable energized medical device further comprises a gear arrangement and an electric motor, wherein the gear arrangement is configured to reduce the velocity and increase the force of the movement generated by the electric motor. In some embodiments, the gear arrangement is configured to transfer a force with a high velocity into a stronger force with lower velocity. In some embodiments, the gear arrangement is configured to transfer a rotating force into a linear force. In some embodiments, the gear arrangement comprises a gear system. In some embodiments, the second portion comprises a magnetic coupling for transferring mechanical work from the electric motor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housing enclosing at least the second portion. In some embodiments, the second portion comprises at least one hydraulic pump. In some embodiments, the hydraulic pump comprises a pump comprising at least one compressible hydraulic reservoir. ASPECT_439_Electro_Subcutaneous_Control_Pop-Rivet2_First-Portion-Polymer According to an embodiment of the inventive concept, implantable energized medical device configured to be held in position by a tissue portion of a patient is provided, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross- sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the second portion is hermetically sealed by means of an outer wall of the second portion comprising titanium. In some embodiments, the first portion comprises an outer wall comprising a polymer material. In some embodiments, the outer wall of the first portion consists of the polymer material. In some embodiments, the second portion is hermetically sealed with respect to the connecting portion and the first portion. In some embodiments, the outer wall of the second portion comprises a ceramic portion integrated in, or brazed to, the titanium. In some embodiments, the ceramic portion of the second portion comprises at least one metallic lead travelling through the ceramic portion for transferring electrical energy or information from within the second portion to an outside of the second portion and/or from the outside of the second portion to an inside of the second portion. In some embodiments, the at least one metallic lead is integrated in, or brazed to, the ceramic portion of the second portion, such that the at least one metallic lead can pass said ceramic portion without being further insulated. In some embodiments, the connecting portion comprises an outer wall comprising titanium. In some embodiments, the outer wall of the connecting portion comprises a ceramic portion integrated in, or brazed to, the titanium. In some embodiments, the ceramic portion of the connecting portion comprises at least one metallic lead travelling through said ceramic portion for transferring electrical energy or information from within the connecting portion to an outside of the connecting portion and/or from the outside of the connecting portion to an inside of the connecting portion. In some embodiments, the at least one metallic lead is integrated in, or brazed to, the ceramic portion of the connecting portion, such that the at least one metallic lead can pass said ceramic portion without being further insulated. In some embodiments, the first portion comprises a first wireless energy receiver for receiving energy transmitted wirelessly by an external wireless energy transmitter, and an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion, and the second portion comprises a second wireless energy receiver configured to receive energy transmitted wirelesslyby the internal wireless energy transmitter. In some embodiments, the first portion comprises a first energy storage unit connected to the first wireless energy receiver. In some embodiments, the second portion comprises a second energy storage unit connected to the second wireless energy receiver. In some embodiments, at least one of the first and second energy storage unit is a solid-state battery. In some embodiments, the solid-state battery is a thionyl-chloride battery. In some embodiments, the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter and store the received energy in the first energy storage unit, the internal wireless energy transmitter isconfigured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. In some embodiments, the first portion comprises a first controller comprising at least one processing unit. In some embodiments, the second portion comprises a second controller comprising at least one processing unit. In some embodiments, at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device. In some embodiments, the first controller is connected to a first wireless communication receiver in the first portion forreceiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion. In some embodiments, the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion. In some embodiments, the first wireless energy receiver comprises a first coil and the wireless energy transmitter comprises a second coil. In some embodiments, the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion. In some embodiments, at least one of the coils are embedded in a ceramic material. In some embodiments, the first portion is detachably connected to at least one of the second portion and the connecting portion. In some embodiments, the connecting portion comprising a flange having a flange area being larger than a cross-section area of the hole in the tissue portion, such that the flange is hindered from travelling through the hole in the tissue portion, such that the second portion and the connecting portion can be held in position by the tissue portion of the patient also when the first portion is disconnected from the connecting portion. In some embodiments, a connecting interface between the connecting portion and the second portion is excentric with respect to the second portion. In some embodiments, a connecting interface between the connecting portion and the first portion is excentric with respect to the first portion. In some embodiments, the second portion has a first end and a second end opposing the first end, wherein the second portion has a length between the first and second end. In some embodiments, the first end and second end are separated in a direction parallel to the second plane. In some embodiments, the first and second ends comprise an elliptical point respectively. In some embodiments, the first and second ends comprise a hemispherical end cap respectively. In some embodiments, the second portion has at least one circular cross-section along the length between the first and second end. In some embodiments, the second portion has at least one oval cross-section along the length between the first and second end. In some embodiments, the second portion has at least one elliptical cross-section along the length between the first and second end. In some embodiments, the implantable energized medical device further comprises a gear arrangement and an electric motor, wherein the gear arrangement is configured to reduce the velocity and increase the force of the movement generated by the electric motor. In some embodiments, the gear arrangement is configured to transfer a force with a high velocity into a stronger force with lower velocity. In some embodiments, the gear arrangement is configured to transfer a rotating force into a linear force. In some embodiments, the gear arrangement comprises a gear system. In some embodiments, the second portion comprises a magnetic coupling for transferring mechanical work from the electricmotor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housing enclosing at least the second portion. In some embodiments, the second portion comprises at least one hydraulic pump. In some embodiments, the hydraulic pump comprises a pump comprising at least one compressible hydraulic reservoir. ASPECT_448_Electro_Subcutaneous_Control_Pop-Rivet2_Second-Portion-Reservoir According to an embodiment of the inventive concept, an implantable energized medical device configured to be held in position by a tissue portion of a patient is provided, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surfaceconfigured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein the second portion comprises or forms a reservoir for holding a fluid; the implantable energized medical device further comprising: a sealed container configured to protrude into the reservoir; an actuator connected to the sealed container, the actuator being configured to expand or retract the sealed container to change the volume of the sealed container for pumping fluid to or from the reservoir; wherein: the first,second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectionalareas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes. In some embodiments, the actuator comprises an electric motor. In some embodiments, the actuator is arranged in the connecting portion. In some embodiments, the actuator is partly or fully arranged inside the sealed container. In some embodiments, the second portion comprises a port in fluid communication with the reservoir for transferring fluid between the reservoir and an additional implant in the patient. In some embodiments, the implantable energized medical device further comprises a conduit connected to the port, the conduit being configured to transfer fluid between the reservoir and the additional implant. In some embodiments, the implantable energized medical device further comprises an injection port for introducing fluid, the injection port being arranged in the first portion. In some embodiments, the implantable energized medical device further comprises an internal conduit connecting the injection port to the reservoir. In some embodiments, the sealed container is a bellows. In some embodiments, the bellows is a metallic bellows. In some embodiments, at least a portion of the sealed container configured to be in contact with fluid comprises metal. In some embodiments, the volume of the sealed container can be altered such that the volume of the sealed container is more than 60% of the maximum volume of the reservoir. In some embodiments, the sealed container comprises at least one flexible portion, and wherein the flexible portion enable at least one of compression and expansion of the sealed container. In some embodiments, the sealed container comprises at least one elastic portion, and wherein the elastic portion enable at least one of compression and expansion of the sealed container. In some embodiments, the implantable energized medical device further comprises a first energy storage unit and/or a second energy storage unit for powering the actuator. In some embodiments, the first portion comprises a first wireless energy receiver for receiving energy transmitted wirelessly byan external wireless energy transmitter, and an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion, and the second portion comprises a second wireless energy receiver configured to receive energy transmitted wirelessly by the internal wireless energy transmitter. In some embodiments, the first energy storage unit is connected to the first wireless energy receiver. In some embodiments, the second portion comprises the second energy storage unit, wherein the second energy storage unit is connected to the second wireless energy receiver. In some embodiments, at least one of the first and second energy storage unit is a solid-state battery. In some embodiments, the solid-state battery is a thionyl-chloride battery. In some embodiments, the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. In some embodiments, the first portion comprises a first controller comprising at least one processing unit. In some embodiments, the second portion comprises a second controller comprising at least one processing unit. In some embodiments, the first controller and/or the second controller is configured to control the actuator. In some embodiments, at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device. In some embodiments, the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion. In some embodiments, the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion. In some embodiments, the first wireless energy receiver comprises a first coil and the wireless energy transmitter comprises a second coil. In some embodiments, the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion. In some embodiments, at least one of the coils are embedded in a ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the implantable energized medical device further comprises a housing configured to enclose at least thesecond portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. In some embodiments, the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. In some embodiments, the first portion is detachably connected to at least one of the second portion and the connecting portion. In some embodiments, the connecting portion comprising a flange having a flange area being larger than a cross-section area of the hole in the tissue portion, such that the flange is hindered from travelling through the hole in the tissue portion, such that the second portion and the connecting portion can be held in position by the tissue portion of the patient also when the first portion is disconnected from the connecting portion. In some embodiments, a connecting interface between the connecting portion and the second portion is excentric with respect to the second portion. In some embodiments, a connecting interface between the connecting portion and the first portion is excentric with respect to the first portion. In some embodiments, the second portion has a first end and a second end opposing the first end, wherein the second portion has a length between the first and second end. In some embodiments, the first end and second end are separated in a direction parallel to the second plane. In some embodiments, the first and second ends comprise an elliptical point respectively. In some embodiments, the first and second ends comprise a hemispherical end cap respectively. In some embodiments, the second portion has at least one circular cross-section along the length between the first and second end. In some embodiments, the second portion has at least one oval cross-section along the length between the first and second end. In some embodiments, the second portion has at least one elliptical cross-section along the length between the first and second end. In some embodiments, the implantable energized medical device further comprises a gear arrangement, wherein the gear arrangement is configured to reduce the velocity and increase the force of the movement generated by the electric motor. In some embodiments, the gear arrangement is configured to transfer a force with a high velocity into a stronger force with lower velocity. In some embodiments, the gear arrangement is configured to transfer a rotating force into a linear force. In some embodiments, the gear arrangement comprises a gear system. In some embodiments, the second portion comprises a magnetic coupling for transferring mechanical work from the electricmotor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housing enclosing at least the second portion Brief description of the drawings The invention is now described, by way of example, with reference to the accompanying drawing, in which: Figures 1A and B shows an embodiment of a medical system comprising an vibration device implanted on the stomach. Figure 2 shows an embodiment of a medical system comprising an vibration device implanted on the stomach. Figure 3 shows an embodiment of a medical system comprising an vibration device implanted on the stomach. Figure 4 shows an embodiment of a medical system comprising an vibration device implanted on the stomach. Figure 5 shows an embodiment of a medical system comprising an vibration device implanted on the stomach. Figure 6A and B show an embodiment of a medical system comprising an vibration device implanted in the sexually responsivetissue of a female. Figure 7 shows an embodiment of a medical system comprising an vibration device implanted in the sexually responsive tissue of a female. Figure 8 shows an embodiment of a medical system comprising an vibration device implanted in the sexually responsive tissue of a female.. Figures 9A–B schematically shows implantable vibration devices according to the present invention. Figure 10 shows, schematically, an embodiment of an inchworm motor. Figure 11 illustrates, schematically, an operation cycle of a piezoelectric inchworm motor. Figure 12 shows, schematically, an embodiment of a piezoelectric inertial motor. Figure 13 shows, schematically, an embodiment of a piezoelectric walk-drive motor. Figure 14 illustrates, schematically, an operation cycle of a piezoelectric walk-drive motor. Figures 15A–B illustrate, schematically, implantable vibration devices comprising an eccentric mechanism operated by a motor. Figure 16 shows, schematically, a Traveling Wave Ultrasonic Motors (TWUSM). Figure 17 shows, schematically, an embodiment of a Standing Wave Ultrasonic Motor (SWUSM). Figure 18 shows, schematically, an embodiment of a linear ultrasonic motor. Figure 19 shows, schematically, an embodiment of an implantable vibration device comprising an piezoelectric vibration generating unit. Figure 20 shows, schematically, a medical system comprising an vibration device implanted on the stomach. Figure 21a shows an example of a system for affecting an neural response in a patient. Figures 21b-e show various examples of electrodes and electrode arrangements. Figure 22a shows an example of a system comprising a sensor device for generating feedback indicative of an neural response. Figures 22b-d show various examples of sensor devices. Figure 22e shows an example of a multi-layer PCB. Figure 22f shows an example of a stretchable PCB. Figure 22’ shows an example of a system for affecting an effector tissue in a patient. Figures 22’b-f show various examples of electrodes and electrode arrangements. Figure 22’’ shows an example of a system comprising a sensor device for generating feedback indicative of an effector response.. Figures 22’’’a shows an example of a system comprising an inhibition device and a denervation device.. Figures 22’’’b-d show various examples of inhibition and denervation devices. Fig.23shows a cross-sectional view of an implantable energized medical device for powering an implantable medical device with hydraulic force. Fig.24 shows an exploded cross-sectional view of an implantable energized medical device for powering an implantable medical device with hydraulic force. Fig.25a shows a detailed cross-sectional view of a first unit of an implantable energized medical device for powering an implantable medical device with hydraulic force. Fig.25b shows a detailed cross-sectional view of a first unit of an implantable energized medical device for powering an implantable medical device with hydraulic force. Fig.25c shows a detailed cross-sectional view of a first unit of an implantable energized medical device for powering an implantable medical device with hydraulic force. Fig.25d shows a detailed cross-sectional view of a first unit of an implantable energized medical device for powering animplantable medical device with hydraulic force. Figs.26a-26b,27a-27b, 28a-28b show alternative embodiments of connecting portions for an implantable energized medical device. Fig.29 shows, schematically, a kit of components forming an implantable energized medical device. Fig.30 shows a detailed cross-sectional view of an embodiment of an implantable energized medical device for powering an implantable medical device. Fig.31 shows a perspective elevated view from the right of an embodiment of an implantable energized medical device for powering an implantable medical device. Fig.32 shows a perspective elevated view from the right of a portion of an embodiment of an implantable energized medical device for powering an implantable medical device. Fig.33 shows a perspective elevated view from the right of a portion of an embodiment of an implantable energized medical device for powering an implantable medical device. Fig.34a shows a cross-sectional plain side view of an embodiment of an implantable energized medical device for powering animplantable medical device. Fig.34b shows a cross-sectional plain side view of an embodiment of an implantable energized medical device for powering an implantable medical device. Fig.34c shows a cross-sectional plain side view of an embodiment of an implantable energized medical device for powering an implantable medical device. Fig.34d shows a cross-sectional plain side view of an embodiment of an implantable energized medical device for powering an implantable medical device. Fig.35a-k, 35m, 35n, 35p and 35q show perspective elevated views from the right of embodiments of an implantable energized medical device for powering an implantable medical device.Fig. 36 shows a perspective elevated view from the right of an embodiment of an implantable energized medical device for powering an implantable medical device. Fig.37 shows a plain top view of an embodiment of an implantable energized medical device for powering an implantable medical device. Figs.38 and 39 show, schematically, plain top views of two embodiments of implantable energized medical devices for powering implantable medical devices. Figs. 40a – 40c illustrate three stages of insertion and fixation of an embodiment of an implantable energized medical device for powering an implantable medical device. Fig.41 shows a detailed cross-sectional view of an embodiment of an implantable energized medical device for powering an implantable medical device. Fig.42a shows, schematically, a portion of an implantable energized medical device for powering an implantable medical device. Fig.42b shows, schematically, a portion of an implantable energized medical device for powering an implantable medical device. Fig.42c shows, schematically, a portion of an implantable energized medical device for powering an implantable medical device. Fig.43a shows a perspective elevated view from the right of an embodiment of an implantable energized medical device for powering an implantable medical device. Figs.43b and 43c show lengthwise cross-sectional areas of the implantable medical device along the line A-A in Fig.43a. Figs.44-46 show cross-sectional plain side views of embodiments of an implantable energized medical device for powering an implantable medical device. Fig.47a shows a perspective elevated view from the right of an embodiment of an implantable energized medical device for powering an implantable medical device Figs.47b and 47c show lengthwise cross-sectional areas of the implantable medical device along the line A-A in Fig.47a. Fig.48 shows a cross-sectional plain side view of an embodiment of an implantable energized medical device. Figs.49a-49c show cross-sectional plain side views of an embodiment of an implantable energized medical device. Figs.50a-50d shows cross-sectional plain side views of the embodiment in Figs.49a-49c when inserted into a tissue portion. Fig.51a-51b show cross-sectional plain side views of embodiments of an implantable energized medical device.Fig. 52– 52FH show an embodiment and describe various functions of an implantable controller for controlling the implantable medical device. Figure 52G shows an elevated perspective view from the left of a housing unit. Figure 52H shows a plain view from the left of a housing unit. Figure 52I shows an elevated perspective view from the left of a housing unit. Figure 52J shows a plain view from the left of a housing unit. Figure 52K shows a system overview of an external device comprising a housing unit and a display device in wireless communication with an implanted medical device. Figure 52L shows a system having a first and a second remote control. Figure 52LL shows the second remote control comprised in a housing unit. Figure 52M schematically shows a medical implant when implanted in a patient. Figure 52N shows a flow chart for a method for training a medical implant to recognize a voice command, according to some embodiments. Figure 52O shows a flow chart for a method for using voice commands to control a medical implant, according to some embodiments. Figures 52P-T illustrates implantable medical devices and external devices for transferring wireless energy to the implantable medical devices. Figure 52U illustrates an implantable medical device and an external device configured to transmit data using near field magnetic induction. Fig.52V shows a schematic illustration of an implantable medical device having a backup function. Detailed Description OBESITY IMPLANT It is an object of the present invention to provide an implantable system for treating obesity in a patient. According to one aspect of the present invention, there is provided a system for treating obesity in a patient, comprising an implantable vibration device configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient. The implantablevibration device is configured to be at least partially invaginated by the tissue of the stomach wall. The implantable vibration device comprises a wireless energy receiver (R) configured to receive wireless energy. This means that the implantable vibration device is notconnected by wire. This way, they can be implanted on the stomach or intestine or even invaginated in an stomach and intestinal wall andare able to follow any movement of the stomach or intestine. In other words, the implantable vibration device is rather flexible and remain flexible over time since any danger that such flexibility may decrease due to fibrosis growing over and encapsulating the system and vibration devices is minimized, thanks to the physical independence of the vibration device. The wall of the stomach comprises various mechanoreceptors which play a part in the control of satiety. When food enters the stomach, the flexible stomach wall stretches which affects mechanoreceptors in the stomach wall. Such stretching causes satiety signals to be transmitted which causes the eating person to feel satiated. Vagal nerve signaling plays a critical role in satiation through a negative feedback loop in which anorexigenic neurometabolic secretions are released in response to food intake. Distension of the stomach by food contents is transduced by intraganglionic laminar endings (IGLEs), the most-prevalent type of vagal afferents innervating the gastric musculature, which sense contraction and distension. These stretch mechanoreceptors produce short-acting vagal afferent signals and increase neuronal activity in the nucleus of the solitarytract (NTS) where vagal afferents terminate and interact with reward, energy homeostasis, hunger, and mood circuitry. In turn the NTS triggers metabolic and neural anorexigenic signaling to yield feelings of hunger or fullness and alter food intake. Since this mechanism is primarily volume-dependent, as opposed to composition-dependent, (carbohydrates, proteins, fats, or saline, methods to manipulate gastricvolume-- intragastric balloons (IGB)-- were developed as an easy-to-deploy tool to reduce the food intake in patients. IGBs are designed to induce stomach distension to induce early satiety. Although they enable short-term weight loss during the adaptation phase, IGBs fail to promote sustained changes in hunger or eating behavior after 10-12 weeks nor do they demonstrate superior outcomes compared to pharmacologic or surgical therapy. Neural adaptation to the chronic distension (as opposed to periodic distension that results from eating), as well as placement, removal, perforation and obstruction complications pose challenges for the long term efficacy and safety of IGBs. The inventor has found that the mechanoreceptors responsible for at least part of the control of satiety in a patient can be activated by vibrations provided by a vibration device implanted in the stomach wall and/or intestine wall in the patient. The implantation involves at least partly invaginating the vibration device by the tissue of the stomach wall. The vibration device is configured to cause sufficient displacement of the stomach wall such that the relevant mechanoreceptors can be activated by its vibration. By at least partly invaginating the vibration device in the stomach tissue, sufficient contact between the tissue of the stomach and the vibration device can beensured. Further, this allows for accurate positioning of the device at a position where the vibrations can induce a response in the vagal nerve. Still further, the invagination in the stomach wall allows the device to kept in place in the stomach wall, to thereby allow it to be long- term implanted in the patient. Mechanoreceptors responsible for producing satiety signals are provided at various positions throughout the gastrointestinal tract. For examples, such receptors are provided in the fundus of the stomach, in the antrum of the stomach, in the cardia of the stomach and in the duodenum of the intestine. Consequently, implantation of the vibration device in the stomach wall or intestine wall at any of said positions allows the vibrations to contact the mechanoreceptors provided therein. An implantable vibration device is now described in more detail with reference to Fig.1a. Fig.1a shows a cross-sectional view of the abdomen of the patient. An implantable vibration device 100 is implanted by invagination in the fundus portion on the outside of the stomach S. The implantable vibration device 100 comprises a vibration generating unit VGU (not shown) provided in a casing. The vibration generating unit is configured to cause the vibration device to vibrate, to thereby stimulate mechanoreceptors in the tissue of the stomach. Additionally, the implantable vibration device 100 may further comprises an wireless energy receiver R configured to receive wireless energy for direct or indirect use by the vibration generating unit VGU. The provision of an energy receiver R allows for the implantable vibration device to be implanted independently in the stomach of the patient. Due to that the vibration device is configured to receive wireless energy for its operation, there is no need for the device to beconnected to an energy source by leads or cabling. Any component positioned in the stomach is at risk of fibrotic overgrowth, which may hamper the flexibility of the implant and/or implanted components. Also shown in Fig.1a is energy transmission implant T, implanted in or provided at a second, different position in the abdomen of the patient. The energy transmission implant T may for example be implanted in fat tissue in the abdomen of the patient. The energy transmission implant T is configured to transmit wireless energy to the energy receiver R for the operation of the implantable vibrationdevice 100. The energy transmission implant T is shown herein to be connected to a wireless energy receiver configured to receive wireless energy from outside of the patient’s body. This allows for two-step energy transmission to the implantable vibration device 100, which reduces the distance any wirelessly transmitted energy has to pass through tissue in the body. Consequently, the energy losses in thetissue can be minimized. Trasnmitted wireless energy is indicated in the Figure with an arrow. The transmitter can for example be implanted a more shallow position in the body, such as at a subcutaneous position which is less prone to be affected by organ movement. Thus, the wireless energy transmitters do not necessarily need to maintain flexibility over time and, therefore, they can be connected to a controller via electric wiring. In some embodiments, the wireless energy transmitter is configured to be implanted in a different, remote position in the body of the patient than the implantable vibration device. In some embodiments, the wireless energy receiver of the implantable vibration device includes a secondary coil, and wherein the wireless energy transmitter comprises a primary coil configured to induce a voltage in the secondary coil of the vibration device. Thisway, energy can be transmitted wirelessly from the energy transmitter to the energy receiver via the primary and secondary coils In some embodiments, RFID technology is used to transfer the energy wirelessly from the energy transmitter to the energy receiver. RFID technology is widely known, and transfer of energy via the aforementioned primary and secondary coils is a well-known way of transferring energy by RFID technology. More specifically, the wireless energy receiver may be configured to receive the energy via RFID pulses. In some embodiments, the system further comprises a feedback unit configured to provide feedback pertaining to an amount of energy received by the wireless energy receiver (R) via the RFID pulses, the system being configured to adjust an amount of energy basedon the feedback. More specifically, the amount of RFID pulse energy that is being received may be adjusted based on the feedback such that the pulse frequency is successively raised until a satisfying level is reached. In some embodiments, the implantable vibration device comprises a rechargeable energy storage unit for temporarily storing at least part of the wirelessly received energy. The rechargeable energy storage unit may be a rechargeable battery or a capacitor. The rechargeable energy storage unit may be charged over time so that an energy amount required by the vibration device or vibration devices is available when needed. In some embodiments, the implantable vibration device comprises an internal controller. The internal controller may serve various functions, the main function consisting in controlling the timing and amount of energy applied to vibration device for controlling the vibrations. Another important function consists in controlling and possibly storing away the amount of energy that is received via the wireless energy receiver. The internal controller may further serve to communicate with an external controller and/or with a remotecontroller. For instance, such communication may relate, inter alia, to the energy transfer via the energy receiver and/or to the timing and/or amount of energy to be applied to the vibration device. In some embodiments, the internal controller is configured to receive the vibration control data wirelessly via the wireless energy receiver. The control data may be used to for controlling the vibration of the implantable vibration devices, such that the relevant mechanoreceptors can be activated. Thus, not only the energy transfer but also data transfer is carried out wirelessly in order for the vibration device to be physically independent other parts of the system. Such data may be received either from an implanted external controller or from a remote controller outside the patient’s body. Preferably, the internal controller receives the vibration control data wirelessly via the wireless energy receiver. In other words,the same port may be used to receive both energy and data. In particular, the energy transferred to and received by the vibration device viathe wireless energy receiver may be appropriately modulated, the modulation defining and, thus, carrying a signal which may be decoded by the internal controller and interpreted as data. This is a well-known technique, which is particularly known and used within the RFID technology. That is, an RFID signal may be used to transport both energy and information. In some embodiments, the internal controller includes an individual code by which it is individually addressable by an externalcontroller or remote controller. More specifically, the internal controller of each of the one or more vibration device may be addressable individually by an external controller or remote controller using an individual code, i.e. a code which is specific to the respective internal controller. This is particularly useful where one external controller or remote controller is used to control more than one vibration deviceand/or where one wireless transmitter is used to transmit energy wirelessly to the wireless energy receivers of more than one vibration device. For instance, when vibration devices are to be activated sequentially, e.g. for stimulating the stomach or intestine in a wave-likemanner, the respective vibration device may be addressed individually using the individual code of the corresponding internal controller. Typically, such individual code is placed at the beginning of the data transmitted to the internal controller. This way, only one or more desired vibration device may be instructed at a given time to vibrate and/or only one or more desired vibration devices will receive and possibly store energy received through the wireless energy receiver. In some embodiments, the system comprises an external controller configured to communicate with the internal controllerwirelessly. The external controller is either an implantable external controller configured to be implanted within the patient’s body or a remote controller configured to communicate directly with the internal controller from outside the patient’s body. Alternatively, the system may comprise a remote controller configured to communicate with the implantable external controller from outside the patient’s body. In the latter case, there are at least three types of controllers, the internal controller within each one of the vibration devices, at least oneexternal controller inside the patient’s body for communication with one or more of the internal controllers, and preferably only one remote controller outside the patient’s body for communicating with the one or more implanted external controllers. The remote controller is preferably operable by the patient and/or a caretaker. However, what needs to be taken care of is that the wireless energy transmitters T are arranged, more particularly implanted,sufficiently close to the wireless energy receivers R such that energy can safely be transmitted from the energy transmitters T to the respectively associated energy receivers R. In some embodiments, the remote controller is configured to communicate with the implantable external controller (CE) viaelectric wiring. However, preferably, the remote controller is configured to communicate with the implantable external controller wirelessly, which is more convenient for the patient and/or care person. Energy transfer and/or data transfer between the remote controller and the implantable external controller may be realized in the same way as the energy and/or data transfer to (and from) the internal controller of the vibration devices. In any case, the remote controller is preferably configured so that it can be mounted to the patient’s skin. Energy transfer between the wireless energy transmitters T and the wireless energy receivers R is preferably carried out via cooperating antennas, such as a primary coil on each of the transmitters T and a secondary coil on each of the receivers R, wherein theprimary coils are configured to induce a voltage in the associated secondary coil, for which reason the wireless energy transmitters and receivers should be arranged close to each other, when implanted. The primary and secondary coils of the wireless transmitters T and receivers R allow for using RFID technology to transfer the energy from the energy transmitter to the energy receiver. This technology is well established. In particular, the wireless energy receivers R may be configured to receive the energy via RFID pulses. The controller is referenced with CE representing an “external” controller as compared to an internal controller CI which may make part of the vibration devices 100. More specifically, the external controller CE is an implanted external controller. Here, implantation isunder the skin such that it can be actuated manually by means of a switch 14, which may have the form of a press button. In particular, the switch 14 may be implanted under the skin, as shown in Fig.1A, or may be provided on the patient’s skin outside the patient’s body. Furthermore, an energy storage unit E, which is rechargeable, is connected to the external controller CE so as to provide energyto the wireless energy transmitter T when controlled accordingly by the external controller CE. The energy storage unit is rechargeablewirelessly through the patient’s skin 200, as indicated in Fig. 1A by an arrow, for which reason the energy storage unit E is preferably implanted very close to the patient’s skin 200. Alternatively, the energy storage unit E may be connected by wire to a port (not shown)mounted on the patient’s skin 200. Whenever needed, the energy storage unit E may be recharged by docking an electric charger to the port. Accordingly, when the system is implanted and used by a patient or by a care person, one may actuate the switch 14 implanted underneath the skin by pressing thereon, which initiates the controller CE so as to run a program installed in a CPU of the controller CE. According to such program, the controller CE will release energy from the energy storage unit E to the vibration device 110 for a predetermined period of time. At the end of the program, energy transfer between the wireless energy transmitters T and receivers R isterminated so that the tissue of the stomach may relax. Of course, the running of the program in the external controller CE can be interrupted at any time by actuating the switch 14 once again, if desired. All components being connected to the external controller may collectively be referred to as a remote unit. The remote unit may preferably be a remote unit as described in further detail with reference to Figs.23–51d. Alternatively, or additionally, the energy transmitter may be part of an implant as disclosed with reference to Figs.52A-52U. The internal or external controller may further be configured to receive sensor input, such as from one or more sensors 250 arranged to generate a signal indicative of a neural response when the vibration device stimulates the stomach tissue. In some embodiments, the internal controller (CI) is configured to wirelessly receive vibration control data for controlling the vibration of the implantable vibration device. Fig.1b shows detailed portion of Fig.1a, focusing on the invagination of the implantable vibration device in the fundus of thestomach wall. As shown herein, the implantable vibration device is preferably fully invaginated in the tissue of the stomach. Consequently, the implantable vibration device can be implanted in and kept in place by the tissue of the stomach, thereby ensuring that there is sufficient contact between the tissue of the stomach wall and the implantable vibration device 100, such that vibration of the implantable vibrationdevice can activate mechanoreceptors in the stomach tissue upon vibrating. In some embodiments, the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall using stomach-to-stomach sutures or staplers. In some embodiments, the system comprises the stomach-to-stomach sutures or staplers. Thus, the implantable vibration device can be kept in a partly invaginated position, preferably on the outside of the stomach or intestine wall. Consequently, the vibration device can be kept in a position where it abuts the tissue of the stomach wall.Invagination means that tissue of the stomach wall SW is folded over the vibration device and sutured or stapled together. Thismeans that a first tissue connects to a second tissue over the vibration device making it possible for the connected tissue of the stomach wall to grow together creating a stable and reliable long term fixation even if the sutures or staplers are resorbed or rejected by the body. The vibration device may be adapted to be placed in the stomach cavity. To this end, the vibration device may be adapted to be inserted into the stomach cavity via a gastroscope or intraluminar instrument, and be adapted to be invaginated in the stomach or intestine wall by surgery. In some embodiments, the implantable vibration device is configured to abut the tissue of the stomach wall on the outside thereof, preferably be being invaginated by the tissue of the stomach wall. In some embodiments the implantable vibration device is configured to abut the tissue of the intestine wall on the outside thereof, preferably be being invaginated by the tissue of the intestine wall. In some embodiments, the implantable vibration device 100 is configured to vibrate at a frequency in the range of 1–150 Hz, such as in the range of 35–150Hz. In one embodiment, the implantable vibration device is configured to vibrate at a frequency in the range of 1–150 Hz, such as in the range of 35–150 Hz, such as in the range of 1–140 Hz, such as in the range of 1–130 Hz, such as in the range of 1–120 Hz, such as in therange of 1–110 Hz, such as in the range of 1–100 Hz, such as in the range of 1–90 Hz, such as in the range of 1–80 Hz, such as in the range of1–70 Hz, such as in the range of 1–60 Hz, such as in the range of 1–50 Hz, such as in the range of 1–40 Hz, such as in the range of 1–30 Hz, such as in the range of 1–20 Hz, such as in the range of 1–10 Hz. In one embodiment, the implantable vibration device is configured to vibrate at a frequency in the as in the range of 35–150 Hz,such as in the range of 35–140 Hz, such as in the range of 35–130 Hz, such as in the range of 35–120 Hz such as in the range of 35–110 Hzsuch as in the range of 35–100 Hz, such as in the range of 35–90 Hz, such as in the range of 35–80 Hz such as in the range of 35–70 Hzsuch as in the range of 35–60 Hz, such as in the range of 35–50 Hz. The vibrations provided by the vibration device can generally be defined by their frequency, their period and by their amplitude. The frequency denotes the number of complete cycles of vibration occurring per period of time. It has been found that a vibration frequency in the range of 1–150 Hz, such as in the range of 35–150Hz., has proven advantageous for activating at least some of the mechanoreceptors responsible for at least part of the control of satiety in the patient. Ithas been found that vibration stimulation in this frequency span can generate a similar response in the vagal nerve system as mechanicaldistension. Within a group of individuals, there may be variations in the frequency range that provides the optimal activation ofmechanoreceptors. However, vibrations within the range of 1–150 Hz have proven advantageous for most individuals. The system disclosed herein provides control of the frequency of the vibrations of the implantable vibration deice, such that an optimum range can be selected for each individual. In some embodiments, the implantable vibration device is configured to vibrate with a period of 0.01–1 seconds, such as of 0.05–1 seconds. The period of the vibration is defined as the time it takes for the vibration to complete its cycle. In some embodiments, the implantable vibration device is configured to vibrate at an amplitude of at least 1 mm. The amplitude is defined as the maximum displacement of the mass center of the vibration device from its resting position. Preferably, the vibration device isprovided its invaginated position such that it can displace tissue of the stomach or intestine wall a distance of about the amplitude. A displacement of tissue of at least 1 mm has been found sufficient to activate the relevant mechanoreceptors in the stomach. Preferably, theimplantable vibration device is configured to vibrate at an amplitude of at least 2 mm, such as in the range of 2–4 mm. The implantablevibration device may be configured to vibrate at an amplitude in the range of 1–4 mm, such as in the range of 1–3 mm, such as in the rangeof 2–3 mm. In some embodiments, the vibration device has a mass of at least 10 g. A sufficient mass is preferred such a sufficient force can be delivered to the tissue for activating at least some of the mechanoreceptors. In some embodiments, the implantable vibration device comprises a vibration generator capable of causing the implantable vibration device to vibrate. The vibration generator may be any vibration generator capable of generating causing the vibration device to vibrate in the manner defined above. Suitable vibration generating units VGU and their implantation in various implantable vibration devices are described with reference to Figs.9–20 The implantable vibration generating device 100 comprises a casing configured to enclose at least part of the components of the implantable vibration generating device. In preferred embodiments, the casing contains the vibration generating unit VGU, the internal controller Ci and the wireless energy receiver R, thereby creating implantable vibration device that is independent in the sense that it doesnot require any physical connections when implanted in the body of the patient. Figure 2 shows an alternative embodiment, in which the implantable vibration device 100 differs from the embodiment shown inFig.1a in that the wireless energy receiver E of the vibration device 110 is positioned outside the casing 120, and connected to the casing 120 by short cabling. The wireless energy receiver E is thus implanted in the patient a position distant from the casing 120. However, the distance between the casing 120 and the energy receiver E is shorter than both the distance between the energy receiver R and the energytransmitter T, and between the casing 120 and the energy transmitter T. The transmitter is merely schematically shown, and may be implanted in fat tissue of the patient, be anchored to bone tissue, or implanted subcutaneously. Typically, the cabling is less than 10 cm long, such as less than 5mm long. Fig.3 shows another embodiment similar to the embodiment shown in Fig.2, in which there is additionally provided a further implantable vibration device 100’. Herein, the first implantable vibration device is invaginated at a first position in the stomach wall, and the second vibration device is implanted in a second, different position in the stomach wall. In this embodiment, both vibration devices 100, 100’are implanted in the fundus of the patient. This allows for the vibration devices 100, 100’ to share a common energy receiver R, configured to receive wireless energy for the operation of both the first vibration device 100 and the second vibration device 100. Preferably, the energy receiver R is provided in a casing which also contains an internal controller capable of distributing the energy for operation of thevibration devices between the vibration devices 100, 100’. Herein, the energy receiver R is shown to be mounted on a rib in the patient. Fig.4 shows a another embodiment similar to the embodiment shown in Fig.3. Herein, each implantable vibration device 100, 100’ comprises a respective energy receiver configured to receive wireless energy for operation of the respective vibration device. In addition,each of the implantable vibration devices 100, 100’ may further comprise a respective internal controller for controlling the operation of the vibration devices, preferably based on vibration data sent received by the respective energy receiver R. As shown in Figs 3 and 4, the system may in some embodiments further comprise a further implantable vibration deviceconfigured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient. The further implantable vibration device may be configured to be positioned on the stomach or intestine wall at a position distant from the firstimplantable vibration device. Alternatively, the further implantable vibration device may be positioned at a position in the vicinity of the first implantable vibration device. The further implantable vibration device is configured to be invaginated in the tissue of the stomach or intestine wall in the same manner as the first implantable vibration device. Fig.5 shows an embodiment similar to the embodiment shown in Fig.1a, with the difference that the implantable vibration device110 is invaginated in the antrum A of the stomach of the patient. It is contemplated that the implantable vibration device 110 could be invaginated at virtually any position on the outer surface of the stomach, but another preferred position would be in the tissue of the cardia of the stomach. The embodiments shown in Figs 1–5 are shown herein to involve a vibration device capable of providing vibrations to the tissue of the stomach of a human, to thereby activate relevant mechanoreceptors in the tissue of the stomach wall and or intestine wall, to induce a feeling of satiety in the human, and/or to reduce the appetite of the human. It is contemplated that the mechanoreceptors produce short- acting vagal afferent signals and increase neuronal activity in the nucleus of the solitary tract (NTS) where vagal afferents terminate and interact with reward, energy homeostasis, hunger, and mood circuitry. In turn the NTS triggers metabolic and neural anorexigenic signaling to yield feelings of hunger or fullness and alter food intake. It is contemplated that relevant mechanoreceptors are positioned throughout the stomach tissue, and that therefore the invagination site may be varied to suit the individual patient. In the embodiments shown in Figs. 1-5, it is equally conceivable that a vagal afferent signal can be produced by the provision of an the stimulation device capable of 40 configured to deliver, directly or indirectly, a first simulation signal to the tissue of the stomach. Such a signal may be delivered by an electrode arrangement having one or more electrodes for electrically stimulating muscle or neural tissue in the stomach. To activate the a produce a vagal afferent signal, the stimulation device may be configured to produce an electric activation signal comprising a frequency in the range of 0.1-100 Hz, such as 1-50 Hz. Such a signal may be referred to as a low-frequency signal. The activation signal may comprise a voltage in the range of 1-15 V, such as about 10V and a current in the range of 1-50 mA, such as 2-4 mA. In such embodiments, the internal controller CI may be provided to control the stimulation device. It is equally conceivable that vibration device comprises, on the outer surface thereof, a stimulation device configured to electrically stimulate muscle tissue in the stomach. The stimulation device provided on the outer surface if the vibration device may comprise an electrode arrangement having one or more electrodes for electrically stimulating muscle or neural tissue in the stomach. Thiselectrical stimulation may be applied in conjunction with the vibrations to further strengthen the vagal afferent signal. Method of implantation The implantable vibration device shown in Fig.1a or 1b may be implanted in the patient by a method as described below. A method for implanting a vibration device configured to reduce appetite in a human patient, the method comprises: invaginating, at least partially, a vibration device in the stomach of the patient. The method may be performed by making an incision in the abdomen of the patient, for accessing the stomach, dissecting aportion of the stomach, inserting the vibration device into the abdomen of the patient, placing a implantable vibration device on the outsideof the stomach or intestine wall; forming a pouch in the stomach or intestine wall; arranging said implantable vibration device at least partlyin the pouch; invaginating the implantable vibration device by the stomach or intestine wall by at least partly closing the pouch by fasteners. The fasteners may be in the form of sutures or staplers. Once the device is invaginated in the stomach of the patient, the method may further comprise controlling the vibration device to vibrate, to thereby stimulate mechanoreceptors in the tissue of the stomach wall. In some embodiments, the controlling controls the vibration device to vibrate at a frequency in the range of 1–150 Hz such as in the range of 35–150 Hz. Mechanoreceptors, which are normally activated by distension of the stomach wall, have proven to be responsive also to vibration treatment within this frequency range, In some embodiments, the controlling controls the vibration device to vibrate at an amplitude of at least 1 mm, such as in the range of 1–10 mm, preferably in the range of 1–5 mm. It has been found that an tissue displacement of at least 1 mm may be required to activate the mechanoreceptors. The implantable vibration device may be configured to vibrate with a period of 0.01–1 seconds, such as of0.05–1 seconds. The step of controlling the vibration device to vibrate may cause the vibration device to vibrate consecutively for a time of at least one minute, such as for at least 2 minutes, such as for at least 3 minutes, such as for at least 2 minutes, such as for at least 2minutes, such as for at least 2 minutes, such as for at least 4 minutes, such as for at least 5 minutes, such as for at least 6 minutes, such as for at least 7 minutes, such as for at least 8 minutes, such as for at least 9 minutes, such as for at least 10 minutes, such as for at least11 minutes, such as for at least 13 minutes, such as for at least 14 minutes, such as for at least 15 minutes, such as for at least 16 minutes, such as for at least 17 minutes, such as for at least 18 minutes, such as for at least 19 minutes, such as for at least 20 minutes, such as for at least 25 minutes, such as for at least 30 minutes. In some embodiments, the vibration device is at least partially invaginated in the outside of the stomach of the patient. This means that part of the vibration device can be viewed by the eye once the vibration device is in its invaginated position. Invagination on the outside of the stomach is preferred, as such procedure would be easier and less invasive than invagination on the inside of the stomach of the patient, which is also part of the present disclosure. In some embodiments, the vibration device is fully invaginated in the stomach of the patient. This means that no part of the vibration device can be viewed by the eye once the vibration device is in its implanted position. Complete invagination improves the long- term fixation and reduces the risk that the function of the device is adversely affected by unexpected ingrowth of fibrotic tissue or the connection with other organs in the body. Complete invagination also reduces the risk that other organs in the body of the patient isinadvertently affected by the medical device, reducing the risk of e.g. pain, damage to the thoracic diaphragm, damage to the liver, damage to the intestines (such as ileus), damage to the esophagus or damage to the spleen etc.. In some embodiments, the vibration device is at least partially invaginated in the antrum of the stomach of the patient. The vibration device may be fully invaginated in the antrum of the stomach of the patient. In some embodiments, the vibration device is at least partially invaginated in the fundus of the stomach of the patient. Thevibration device may be fully invaginated in the fundus of the stomach of the patient. In some embodiments, the vibration device is at least partially invaginated in the cardia of the stomach of the patient. Thevibration device may be fully invaginated in the antrum of the cardia of the patient. In some embodiments, the method is a laparoscopic surgical method, and the method further comprises the step of introducingthe vibration device into the body of the patient through a laparoscopic trocar. In some embodiments, the method is a gastroscopic method, and the method further comprises the step of introducing the vibration device into the body of the patient through the esophagus of the patient.In some embodiments, the implantable vibration device could be implanted using a laparoscopic surgical technique which could comprise the following steps: introducing at least one of; a needle, a trocar, a tube, a tubular instrument and a surgical instrument, through the fascia of at least one of any muscles or any fibrotic intersections comprising; the rectus abdominalis, transversus abdominalis, the External Oblique, the Internal Oblique, the linea alba, a tendnous intersection, and the umbilicus, blowing in pressurized gas through the needle or trocar or surgical instrument or any device inflating the abdominal cavity, introducing working instruments comprising at least one of the steps of, inserting at least one first trocar into the abdominal cavity, introducing at least one camera through the trocar, inserting at least a second trocar into the abdominal cavity, inserting at least one instrument preferably through the second trocar, inserting at least a third trocar into the abdominal cavity, inserting at least one second instrument preferably through the third trocar, dissecting an area of the stomach or intestine, identifying a suitable position for placing the vibration device on the stomach or intestinal wall, inserting the vibration device into the abdomen of the patient, creating a pouch in the stomach or intestinal wall, arranging said implantable vibration device at least partly in the pouch; invaginating the implantable vibration device by the stomach or intestine wall by at least partly closing the pouch by fasteners extracting the instruments, camera and trocar, and in relation thereto suturing, if necessary, the abdominal wall and permanently closing the skin. In some embodiments, the implantable vibration device disclosed herein could be implanted using an open surgical technique which could comprise the following steps: cutting and open the skin and abdominal wall. dissecting or cutting through the fascia of at least one of any muscles or any fibrotic intersections comprising; the rectus abdominalis, transversus abdominalis, the External Oblique, the Internal Oblique, the linea alba, a tendnous intersection, and the umbilicus, introducing at least one working instrument, dissecting an area of the stomach, identifying a suitable position for placing the vibration device on the stomach or intestine wall, inserting the vibration device into the abdomen of the patient, creating a pouch in the stomach or intestinal wall, arranging said implantable vibration device at least partly in the pouch; invaginating the implantable vibration device by the stomach or intestine wall by at least partly closing the pouch by fasteners extracting the instruments, camera and trocar, and in relation thereto suturing, if necessary, the abdominal wall and permanently closing the skin. In some embodiments, the method comprises the step of applying the surface friction reducing coating onto the vibration device prior to implantation in the body of the patient. In some embodiments, the method comprises the step applying the surface friction reducing coating in situ between the implantable vibration device and tissue of the stomach wall of the patient. METHOD OF TREATMENT In any one of the embodiments described in Figs 1A-5, a method of operating the vibration device to reduce the appetite in a human may be practiced. In this regard, there is provided a method of reducing appetite in a human using a medical device system comprising a pre-implanted vibration device 110 at least partially invaginated in the wall of the stomach, the method comprising controlling the vibration device 110 to vibrate to thereby activate at least one mechanoreceptor in the tissue of the stomachHerein, the term “pre-implanted” is intended to denote that vibration device that is already implanted in the body of the human, at the timethe method is performed. Consequently, the method is devoid of any steps of surgery, as the there is no need to implant the vibration device due to the fact that it is already provided in the patient, In some embodiments, the vibration device is controlled to vibrate at a frequency in the range of 1–150 Hz, such as in the range of 35–150 Hz. In some embodiments, the vibration device is controlled to vibrate at a amplitude of at least 1 mm, such as in the range of 1–5 mm, more preferably in the range of 2–4 mm. In some embodiments, the vibration device is controlled to vibrate consecutively for a period of at least one minute. In some embodiments, the pre-implanted vibration device further comprises a wireless energy receiver, and wherein the method further comprises the steps of receiving, at the energy receiver, wireless energy for directly or indirectly operating the wireless energy device. In some embodiments, the vibration device further comprises an internal controller CI, wherein the method further compriseswirelessly receiving, at the internal controller, vibration control data for controlling vibration of the vibration device. In some embodiments, the vibration control data is wirelessly received via the wireless energy receiver (R). In some embodiment, the method further comprises the step of sending a wireless control signal from a wireless remote control to the pre-implanted medical device system, wherein the vibration device is operated as a result of the receipt of the wireless control signal at the pre-implanted medical device system. In some embodiments, wherein the medical device system further comprises a pre-implanted controller CE configured to control the operation of the vibration device, and wherein the method comprises operating the vibration device as a result of at least one of: the receipt of a wireless control signal at the controller of the pre-implanted medical device, and the receipt of a sensor signal from a pre-implanted sensor at the controller, and the lapse of a pre-determined time. In some embodiments, the method is a cosmetic method. This means that it may be performed with the sole intention of losing weight for aesthetic purposes In some embodiments, the method is a non-therapeutic method. SEXUAL STIMULATION IMPLANT Figure 6a shows a vibration system implanted in a female patient. An wireless energy transmitter T is shown herein to be implanted in the abdomen of the patient, so that the relatively limited space in the sexually responsive tissue of the patient can be utilized by the vibration device(s). A first and a second vibration device 100, 100’ are shown to be implanted in sexually responsive tissue of the vulva of the female. It shall be noted that the vibration device disclosed herein is suitable for implantation in healthy female, for the purpose of enhancing sexuality. Additionally, it is suitable for implantation female patient’s suffering from sexual dysfunction for the purpose of providing treatment of said sexual dysfunction. The first and second vibration devices each comprises a respective energy receiver R configured to receive wireless energy for the operation of the vibration devices. This means that an independent vibration device, which requires no cables external components can be positioned in the abdomen. The energy receiver may be configured to receive energy for direct or indirect operation of the vibration devices from outside of the patient, or such energy may be transmitted by the energy transmitter T shown herein to be implanted in the abdomen of the patient. Figure 6b illustrates the configuration of Fig. 6a in greater detail. In this embodiment, there is provided a respective vibration device 100, 100’ in the sexually responsive tissue of the vulva of the patient, on opposing sides of the vaginal opening. Herein, the implantable vibration devices are shown to be implanted in the labia major of the patient, but other positions of implantation can also be contemplated. Thus, the vibration devices 110, 110’ are configured to vibrate to stimulate at least the sexually responsive tissue in the labia major. In practice, it is likely that the vibrations will propagate in the tissue of the patient and stimulate also other sexually responsive tissue. Herein, the implantable vibration devices 100, 100’ are shown to be provided in a respective casing 120 in which there is also provided a respective energy receiver R, configured to receive wireless energy transmitted from the energy transmitter T for the operationof the vibration of the vibration devices 110, 110’. Inside the respective casings, there may also be provided a respective internal controller CI capable of controlling the vibration of the respective vibration devices. The configuration of the vibration devices 110, 110’ will be described in more detail in the following, with reference to Figs.15a and 15b. Turning back to the embodiment shown in Figs 6a and b, the provision of an energy receiver R allows for the implantable vibrationdevice 110, 110’ to be implanted independently in the sexually responsive tissue of the vulva of the patient. Due to that the vibration devices110, 110’ configured to receive wireless energy for its operation, there is no need for the device to be connected to an energy source byleads or cabling. Any component positioned in the body is at risk of fibrotic overgrowth, which may hamper the flexibility of the implant and/or implanted components. Also shown in the embodiment of Figs.6a and 6b is an energy transmission implant T, implanted in or provided at a second, different position in the abdomen of the patient. The energy transmission implant T may for example be implanted in fat tissue in the abdomen of the patient. The energy transmission implant T is configured to transmit wireless energy to the energy receiver R for theoperation of the implantable vibration device 100. The energy transmission implant is shown herein to be adapted to receive wireless energy, indicated by the arrow, from the outside of the body of the patient. This allows for two-step energy transmission to the implantable vibration device 110, 110’, which reduces the distance any wirelessly transmitted energy has to pass through tissue in the body.Consequently, the energy losses in the tissue can be minimized. The transmitter can for example be implanted a more shallow position in the body, such as at a subcutaneous position which is less prone to be affected by organ movement. Thus, the wireless energy transmitters do not necessarily need to maintain flexibility over time and, therefore, they can be connected to a controller via electric wiring. In some embodiments, the wireless energy transmitter T is configured to be implanted in a different, remote position in the body of the patient than the implantable vibration device. In some embodiments, the wireless energy receiver of the implantable vibration device includes a secondary coil, and wherein the wireless energy transmitter comprises a primary coil configured to induce a voltage in the secondary coil of the vibration device. This way, energy can be transmitted wirelessly from the energy transmitter to the energy receiver via the primary and secondary coils In some embodiments, RFID technology is used to transfer the energy wirelessly from the energy transmitter to the energy receiver. RFID technology is widely known, and transfer of energy via the aforementioned primary and secondary coils is a well-known way of transferring energy by RFID technology. More specifically, the wireless energy receiver may be configured to receive the energy via RFID pulses. In some embodiments, the system further comprises a feedback unit configured to provide feedback pertaining to an amount of energy received by the wireless energy receiver (R) via the RFID pulses, the system being configured to adjust an amount of energy basedon the feedback. More specifically, the amount of RFID pulse energy that is being received may be adjusted based on the feedback such that the pulse frequency is successively raised until a satisfying level is reached. In some embodiments, the implantable vibration device comprises a rechargeable energy storage unit for temporarily storing at least part of the wirelessly received energy. The rechargeable energy storage unit may be a rechargeable battery or a capacitor. The rechargeable energy storage unit may be charged over time so that an energy amount required by the vibration device or vibration devices is available when needed. In some embodiments, the implantable vibration device comprises an internal controller. The internal controller may serve various functions, the main function consisting in controlling the timing and amount of energy applied to vibration device for controlling the vibrations. Another important function consists in controlling and possibly storing away the amount of energy that is received via the wireless energy receiver. The internal controller may further serve to communicate with an external controller and/or with a remote controller. For instance, such communication may relate, inter alia, to the energy transfer via the energy receiver and/or to the timing and/or amount of energy to be applied to the vibration device. In some embodiments, the internal controller (CI) is configured to wirelessly receive vibration control data for controlling the vibration of the implantable vibration device. In some embodiments, the internal controller is configured to receive the vibration control data wirelessly via the wireless energy receiver. The control data may be used to for controlling the vibration of the implantable vibration devices, such that the relevant mechanoreceptors can be activated. Thus, not only the energy transfer but also data transfer is carried out wirelessly in order for the vibration device to be physically independent other parts of the system. Such data may be received either from an implanted external controller or from a remote controller outside the patient’s body.Preferably, the internal controller receives the vibration control data wirelessly via the wireless energy receiver. In other words, the same port may be used to receive both energy and data. In particular, the energy transferred to and received by the vibration device via the wireless energy receiver may be appropriately modulated, the modulation defining and, thus, carrying a signal which may be decoded by the internal controller and interpreted as data. This is a well-known technique, which is particularly known and used within the RFID technology. That is, an RFID signal may be used to transport both energy and information. In some embodiments, the internal controller includes an individual code by which it is individually addressable by an externalcontroller or remote controller. More specifically, the internal controller of each of the one or more vibration device may be addressable individually by an external controller or remote controller using an individual code, i.e. a code which is specific to the respective internal controller. This is particularly useful where one external controller or remote controller is used to control more than one vibration deviceand/or where one wireless transmitter is used to transmit energy wirelessly to the wireless energy receivers of more than one vibration device. For instance, when vibration devices are to be activated sequentially, e.g. for stimulating the stomach or intestine in a wave-likemanner, the respective vibration device may be addressed individually using the individual code of the corresponding internal controller. Typically, such individual code is placed at the beginning of the data transmitted to the internal controller. This way, only one or more desired vibration device may be instructed at a given time to vibrate and/or only one or more desired vibration devices will receive and possibly store energy received through the wireless energy receiver. In some embodiments, the system comprises an external controller configured to communicate with the internal controllerwirelessly. The external controller is either an implantable external controller configured to be implanted within the patient’s body or a remote controller configured to communicate directly with the internal controller from outside the patient’s body. Alternatively, the system may comprise a remote controller configured to communicate with the implantable external controller from outside the patient’s body. In the latter case, there are at least three types of controllers, the internal controller within each one of the vibration devices, at least one external controller inside the patient’s body for communication with one or more of the internal controllers, and preferably only one remote controller outside the patient’s body for communicating with the one or more implanted external controllers. The remote controller is preferably operable by the patient and/or a caretaker. In some embodiments, the remote controller is configured to communicate with the implantable external controller (CE) via electric wiring. However, preferably, the remote controller is configured to communicate with the implantable external controller wirelessly, which is more convenient for the patient and/or care person. Energy transfer and/or data transfer between the remote controller and the implantable external controller may be realized in the same way as the energy and/or data transfer to (and from) the internal controller of the vibration devices. In any case, the remote controller is preferably configured so that it can be mounted to the patient’s skin. Alternatively, or additionally, the energy transmitter may be part of an implant as disclosed with reference to Figs.23-51d, where the components referred to as remote unit would be suitable to comprise the energy transmitter T. In Figure 7 and 8, two respective configurations of the implantable vibration device system are shown. The system comprises a first vibration device 110 and a second vibration device 110’, shown herein to be implanted in a respective labia major in the vulva of the patient In the embodiment shown in Fig.7, there is shown a configuration where each vibration device 110, 110’ are provided with a respective wireless energy receiver capable of receiving wireless energy, indicated by an arrow in the figure. In addition, each of theimplantable vibration devices 100, 100’ may further comprise a respective internal controller for controlling the operation of the vibration devices, preferably based on vibration data sent received by the respective energy receiver R. To supply each vibration device with wireless energy, there is provided a an external control CE configured to control a first and second wireless energy transmitter, each being configured to supply a respective wireless energy receiver with wireless energy. This way, an internal controller in the respective vibration device could be omitted, but it is considered advantageous if each vibration device further comprises a respective internal controller. The external controller CE is shown herein to be connected to an energy source E, such as a rechargeable battery. The energy source is shown to be configured of being charged by wireless energy indicated in the figure by an arrow, transmitted from the outside of the patient. The external controller CE is in turn configured to control the energy transmitters T to transit energy to the energy receivers. The transmitted energy may be provided by the energy source, or energy received from outside of the patient’s body may directly be transmitted by the wireless energy transmitters T to the wireless energy receivers R. Fig. 8 shows another embodiment similar to the embodiment shown in Fig. 7, in which the vibrations devices 110, 110’ share acommon energy receiver, shown herein to be implanted near the vulva of the patient and secured to e.g. the pubic bone. The wireless energy receiver is preferably provided in a suitable casing, which may further advantageously comprise an internal control CI configured to receive wireless energy for the operation of both the first vibration device 100 and the second vibration device 100. Preferably, the energy receiver R is provided in a casing which also contains an internal controller capable of distributing the energy for operation of the vibration devicesbetween the vibration devices 110, 110’. The vibration devices 110, 110’ are shown herein to be connected to the energy receiver via a respective short cabling. Preferably, each cabling has a length of no more than 10 cm, such as no more than 5 cm. The system described in any one of Figs.6a–8 may be implanted in the patient by the a method as described in the following. The system described in any one of Figs.6a–8 may also be operated by a method as described in the following. Implantation method In a method for implanting a vibration device for delivering vibrations to the sexually responsive tissue in a female, wherein the vibration device (110.110’) is configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina, wherein said implantable vibration device comprises a wireless energy receiver (R) configured to receive wireless energy, the method may comprise the steps of creating an opening in the skin or vaginal wall of the female patient; dissecting an area of the sexually responsive tissue, and placing the vibration device within said area. In some embodiments, the step of creating an opening in the skin or vaginal wall of the female patient comprises inserting a tube or needle into the patients body, filling the tube or needle with a gas and thereby expanding a cavity within the female patients body, inserting at least two laparoscopic trocars into said cavity, inserting at least one camera trough at least one laparoscopic trocar, inserting at least one dissecting tool through at least one laparoscopic trocar. In some embodiments, the area of the sexually responsive tissue is the vulva. In some embodiments, the area of the sexually responsive tissue is the vagina. In some embodiments, the area of the sexually responsive tissue is the clitoris. In some embodiments, the area of the sexually responsive tissue is the labia major. In some embodiments, the area of the sexually responsive tissue is the labia minor. In some embodiments the area of the is the vestibule. Sexual stimulation method Also provide is a method for delivering vibrations to the sexually responsive tissue of a female using a at least partly pre- implanted medical device system comprising a vibration device pre-implanted in the sexually responsive tissue of the vulva or the wall ofthe vagina wherein the method comprises the steps of controlling the vibration device to vibrate to thereby stimulate the sexually responsive tissue of the vulva or wall of the vagina. Herein, the term “pre-implanted” is intended to denote that .vibration device that is already implant in present in the body of the human, at the time the method is performed. Consequently, the method is devoid of any steps of surgery, as the there is no need to implant the vibration device due to the fact that it is already provided in the patient, at the time the vibration device is controlled to vibrate. In some embodiments, the , wherein the vibration device comprises a wireless energy receiver, and the method further comprises receiving, at the energy receiver, wireless energy for directly or indirectly operating the vibration device. In some embodiments, wherein the vibration device and the wireless energy receiver R are provided in a common, pre-implanted, housing. In some embodiments, the vibration device is controlled to vibrate at an frequency in the range of 0.1 to 1 kHz. In some embodiments, the vibration device is controlled to vibrate at an frequency in the range of 0.1 to 100 Hz. In some embodiments, the vibration device is controlled to vibrate at an amplitude of at least 0.1 mm, or of at least 1 mm, or in the range of 0.1 to 10 mm, or in the range of 1 to 5 mm. In some embodiments, the method further comprising a step of step of sending a wireless control signal the pre-implanted vibration device, wherein the vibration device is configured to vibrate as a result of the wireless control signal. In some embodiments, the pre-implanted medical device system further comprises a controller configured to control the operation of the vibration device, and wherein the method comprises operating the first member as a result of at least one of: the receipt of a wireless control signal at the controller of the pre-implanted medical device, and the receipt of a sensor signal from a pre-implanted sensor at the controller, and the lapse of a pre-determined time. VIBRATION DEVICE The present invention also relates to implantable vibration devices configured to deliver therapeutic or non-therapeutic vibration stimulation to human tissue at an implanted position in the human body. These positions include the stomach, to control the appetite in the patient, and the sexually responsive tissue in the female. The implantable vibration device shown in any one of Figures 1A–8 could advantageously comprise a vibration device 110 as described in greater detail in the following. It shall be noted the implantable vibration device 110 is not a cochlear implant. Figures 9a-b schematically illustrate an implantable vibration device 110 which is suitable for operation in the human body according to any one of the embodiments described with reference to Figs 1A–8 comprising a casing 120. Contained in the casing 120, a vibration generating unit, preferably a piezoelectric vibration generating unit VGU is provided. The VGU is capable of causing the implantable vibration device 110 to vibrate in a suitable manner. In Figs.9A and 9B, schematic illustrations of embodiment of the implantable vibration device 110 of the present invention areshown, suitable for implantation in the patient according to any one of the embodiments described with reference to Figs, 1a–8. The implantable vibration devices 110 of the present invention comprises a vibration generating unit VGU provided in a casing 120. Inside the casing, there may also be provided a wireless energy receiver R for receiving wireless energy for the operation of the vibration generating unit, and an internal controller CI configured to control the operation of the vibration generating unit. By providing a wireless energy receiver R and a controller CI within the casing 120, a physically independent vibration generating device which can be implanted in the human body is obtained. Thus, leads and cables for controlling and/or providing energy to the vibration device can be omitted. In alternative embodiments, the wireless energy receiver R and the internal controller may be provided in a different casing, separate from the casing 120, and connected to the vibration generating unit via lead or cable. Preferably, such lead or cable flexible andshort, typically having a length of less than 10 cm, such as of less than 5 cm. This may be advantageous as it allows for the casing 120 to be implanted via invagination in the tissue of the patient, whereas a smaller casing containing the wireless energy receiver and/or internal control CI can be implanted in a different manner. The casing 120 is shown in Fig. 9A to have a substantially cylindrical outer shapes, but other shapes such a sphere can also be contemplated, which is shown in Fig.9B. Sharp edges should generally be avoid, as such edges could damage the tissue during in the implanted position. According to an embodiment, implantable vibration device 110 may be configured to be invaginated when placed on the outside of the stomach wall. In another embodiment, the implantable vibration device 110 may be configured to be invaginated when placed on the inside of the stomach wall. In some embodiments, the implantable vibration device 110 is configured to be at least partially invaginated by the tissue of the stomach wall using stomach-to-stomach sutures or staplers. In some embodiments, the system comprises the stomach-to-stomach sutures or staplers. Thus, the implantable vibration device can be kept in a partly invaginated position, preferably on the outside of the stomach or intestine wall. Consequently, the vibration device 110 can be kept in a position where it abuts the tissue of the stomach wall.The vibration device 110 may be adapted to be placed in the stomach cavity. To this end, the vibration device may be adapted to be inserted into the stomach cavity via a gastroscope or intraluminar instrument, and be adapted to be invaginated in the stomach or intestine wall by surgery. In some embodiments, the implantable vibration device 110 is configured to abut the tissue of the stomach wall on the outside thereof, preferably be being invaginated by the tissue of the stomach wall. In some embodiments the implantable vibration device 110 is configured to abut the tissue of the intestine wall on the outside thereof, preferably be being invaginated by the tissue of the intestine wall. In some embodiments, the implantable vibration device 110 is configured to be implanted in or near the sexually responsive tissue near the vulva of a female patient. In some embodiments, the implantable vibration device has a volume of from 0.3 cm3– 6.6 cm3, or in the range 0.5 cm3 – 7.3 cm3,or in the range 3 cm3 – 8 cm3, or in the range 2.5 cm3 – 6.6 cm3, or in the range 4 cm3 – 7.3 cm3. The wireless energy receiver R is configured to receive wireless energy for the operation of the vibration generating unit. Insome embodiments, the wireless energy receiver R of the implantable vibration device includes a secondary coil, configured to receive wireless energy from a wireless energy transmitter, preferably comprising a primary coil configured to induce a voltage in the secondary coil of the vibration device. This way, energy can be transmitted wirelessly from the energy transmitter to the energy receiver via the primary and secondary coils. A suitable transmitter is typically implanted at a second, distant position in the body of the patient. Suitable transmitters are described in relation to Figs.23–51d. Suitable modes for transferring energy are described with reference to Figs.52A–U. In some embodiments, RFID technology is used to transfer the energy wirelessly from an energy transmitter to the energy receiver R. RFID technology is widely known, and transfer of energy via the aforementioned primary and secondary coils is a well-knownway of transferring energy by RFID technology. More specifically, the wireless energy receiver R may be configured to receive the energy via RFID pulses. In some embodiments, the internal controller CI further comprises a feedback unit configured to provide feedback pertaining to an amount of energy received by the wireless energy receiver (R) via the RFID pulses. Based on this feedback an amount of transmittedand/or received energy can be controlled based on the feedback. More specifically, the amount of RFID pulse energy that is being received may be adjusted based on the feedback such that the pulse frequency is successively raised until a satisfying level is reached. In some embodiments, the implantable vibration device comprises a rechargeable energy storage unit for temporarily storing at least part of the wirelessly received energy. The rechargeable energy storage unit may be a rechargeable battery or a capacitor. Therechargeable energy storage unit may be charged over time so that an energy amount required by the vibration device or vibration devices is available when needed. The internal controller CI may serve various functions, the main function consisting in controlling the timing and amount of energy applied to vibration device for controlling the vibrations. Another important function consists in controlling and possibly storing away the amount of energy that is received via the wireless energy receiver. In some embodiments, the reachable energy storage unitdiscussed above is part of the internal controller. The internal controller may further serve to communicate with an external controller and/or with a remote controller. For instance, such communication may relate, inter alia, to the energy transfer via the energy receiver and/or to the timing and/or amount of energy to be applied to the vibration device. The internal controller (CI) may further be adapted to control whether received energy should be utilized to charge the rechargeable energy storage device or to operate the vibration generating unit. In some embodiments, the internal controller (CI) is configured to wirelessly receive vibration control data for controlling the vibration of the implantable vibration device. In some embodiments, the internal controller is configured to receive the vibration control data wirelessly via the wireless energy receiver R. The control data may be used to for controlling the vibration of the implantable vibration devices, such that the relevantresponse in the patient can be activated. Thus, not only the energy transfer but also data transfer is carried out wirelessly in order for the vibration device to be physically independent other parts of the system. Such data may be received either from an implanted external controller or from a remote controller outside the patient’s body. Preferably, the internal controller receives the vibration control data wirelessly via the wireless energy receiver. In other words, the same port may be used to receive both energy and data. In particular, the energy transferred to and received by the vibration device via the wireless energy receiver may be appropriately modulated, the modulation defining and, thus, carrying a signal which may be decoded by the internal controller and interpreted as data. This is a well-known technique, which is particularly known and used within the RFID technology. That is, an RFID signal may be used to transport both energy and information. In some embodiments, the internal controller includes an individual code by which it is individually addressable by an externalcontroller or remote controller. If more than one vibration devices are provided in the patient, each vibration device may be addressable individually by an external controller or remote controller using an individual code, i.e. a code which is specific to the respective internal controller. This is particularly useful where one external controller or remote controller is used to control more than one vibration device and/or where one wireless transmitter is used to transmit energy wirelessly to the wireless energy receivers of more than one vibration device. For instance, when vibration devices are to be activated sequentially, e.g. for stimulating the stomach or intestine in a wave-likemanner, the respective vibration device may be addressed individually using the individual code of the corresponding internal controller. Typically, such individual code is placed at the beginning of the data transmitted to the internal controller. This way, only one or more desired vibration device may be instructed at a given time to vibrate and/or only one or more desired vibration devices will receive and possibly store energy received through the wireless energy receiver. A suitable transmitter is typically implanted at a second, distant position in the body of the patient. Suitable transmitters are described in relation to Figs.23–51d. Suitable modes for transferring energy are described with reference to Figs.52A–U. The casing 120 is made of a biocompatible material compatible with long-term implantation in the body of the patient. As is well known, the body tends to react to a medical implant, partly because the implant is a foreign object, and partly because the implant interacts mechanically with tissue of the body and/or blood flowing within the body. Implantation of medical devices and/or biomaterial in the tissue of a patient may trigger the body’s foreign body reaction leading to the formation of foreign body giant cells and the development of a fibrous capsule enveloping the implant. The formation of a dense fibrous capsule that isolates the implant from the host is the common underlying cause of implant failure. Implantation of medical devices and/or biomaterial in a blood flow may also cause the formation of fibrous capsules due to the attraction of certain cells within the blood stream. Implants may, due to the fibrin formation, cause blood clotting leading to complications for the patient. Implants in contact with flowing blood and/or placed in the body may also lead to bacterial infection. One common way of counteracting the creation of blood clots is by using blood thinners of different sorts. One commonly used blood thinner is called heparin. However, heparin has certain side effects that are undesirable. In general, fibrin is an insoluble protein that is partly produced in response to bleeding and is the major component of blood clots. Fibrin is formed by fibrinogen, a soluble protein that is produced by the liver and found in blood plasma. When tissue damage results in bleeding, fibrinogen is converted at the wound into fibrin by the action of thrombin, a clotting enzyme. The fibrin then forms, together withplatelets, a hemostatic plug or clot over a wound site. The process of forming fibrin from fibrinogen starts with the attraction of platelets. Platelets have thrombin receptors on their surfaces that bind serum thrombin molecules. These molecules can in turn convert soluble fibrinogen into fibrin. The fibrin then forms long strands of tough and insoluble protein bound to the platelets. The strands of fibrin are then cross-linked so that it hardens and contracts. This is enabled by Factor XIII which is a zymogen found in the blood of humans. Fibrin may also be created due to the foreign body reaction. When a foreign body is detected in the body, the immune system will become attracted to the foreign material and attempt to degrade it. If this degradation fails, an envelope of fibroblasts may be created to form a physical barrier to isolate the body from the foreign body. This may further evolve into a fibrin sheath. In case the foreign body is an implant, this may hinder the function of the implant. Thus, implants can, when implanted in the body, be in contact with flowing blood. This may cause platelet adhesion on the surface of the implants. The platelets may then cause the fibrinogen in the blood to convert into fibrin creating a sheath on and/or around the implant. This may prevent the implant from working properly and may also create blood clots that are perilous for the patient. However, implants not in contact with flowing blood can still malfunction due to fibrin creation. Here the foreign body reaction may be the underlying factor for the malfunction. Further, the implantation of a foreign body into the human body may cause an inflammatory response. The response generally persists until the foreign body has been encapsulated in a relatively dense layer of fibrotic connective tissue which protects the human body from the foreign body. The process may start with the implant immediately and spontaneously acquiring a layer of host proteins. The blood protein-modified surface enables cells to attach to the surface, enabling monocytes and macrophages to interact on the surface of the implant. The macrophages secrete proteins that modulate fibrosis and in turn develop the fibrosis capsule around the foreign body, i.e., the implant. In practice, a fibrosis capsule may be formed of a dense layer of excess fibrous connective tissue. Theinelastic properties of the fibrotic capsule may lead to hardening, tightness, deformity, and distortion of the implant, which in severe cases may result in revision surgery. Implants may also cause infections of different sorts. Bacterial colonization that leads to implant-associated infections are a known issue for many types of implants. For example, the commensal skin bacteria, Staphylococci, and the Staphylococcus aureus tend to colonize foreign bodies such as implants and may cause infections. A problem with the Staphylococci is that it may also produce a biofilm around the implant encapsulating the bacterial niche from the outside environment. This makes it harder for the host defense systems to take care of the bacteria. There are other examples of bacteria and processes that creates bacteria causing infection due to implants. Thus, in order to mitigate fibrin creation caused by contact between components of the casing 120 of the vibration device 110 may comprise a specific coating arranged on the respective outer surface of the component. The coating may comprise at least one layer of a biomaterial. The biomaterial is preferably fibrin-based. The coating may comprise at least one drug or substance with antithrombotic and/or antibacterial and/or antiplatelet characteristics. The drug or substance may be encapsulated in a porous material. There may be provided a second coating arranged on the first coating. The second coating may be a different biomaterial than said first coating. In particular, the first coating may comprise a layer of perfluorocarbon chemically attached to the surface and the second coating may comprise a liquid perfluorocarbon layer. Further preferably, the surface may comprise a metal, such as at least one of titanium, cobalt, nickel, copper, zinc, zirconium, molybdenum, tin or lead. Finally, the surface may comprise a micro pattern, wherein the micro pattern may be etched into the surface prior to insertion into the body. The layer of a biomaterial may be coated on the micro pattern. Fig.9’a shows an implantable vibration device 110 comprising a casing 120, an casing surface 520 and a coating 530 arranged on the surface 520. The coating 530 may be configured to have antibacterial characteristics. Depending on the use of the implantable medical device, one or both of these effects may be advantageous. The coating 530 may be arranged on the surface 520 so that the coating shieldsthe surface 520 from direct contact with the host body where the vibration device 110 is inserted The coating 530 may comprise at least one layer of a biomaterial. The coating 530 may comprise a material that is antithrombotic. The coating 530 may also comprise a material that is antibacterial. The coating 530 may be attached chemically to the surface 520. Fig.9’b shows an exemplary implantable vibration device with a body 510 and a surface 520. The implantable vibration device D comprises multiple coatings, 530a, 530b, 530c arranged on the surface. The implantable vibration device may comprise any number ofcoatings, the particular embodiment of Fig. 6 discloses three layers of coating 530a, 530b, 530c. The second coating 530b is arranged on the first coating 530a. The different coatings 530a, 530b, 530c may comprise different materials with different features to prevent either fibrin sheath formation or bacteria gathering at the surface 520. As an example, the first coating 530a may comprise a layer of perfluorocarbon chemically attached to the surface. The second coating 530b may comprise a liquid perfluorocarbon layer arranged on the first coating 530a. The coatings referred to may comprise any substance or any combination of substances. The coatings may comprise anticoagulant medicaments, such as: Apixaban, Dabigatran, Dalteparin, Edoxaban, Enoxaparin, Fondaparinux, Heparin, Rivaroxaban, and Warfarin. The coatings may also comprise medicines or substances that are so-called antiplatelets. These may include Aspiring. Cilostazol, Clopidogrel, Dipyridamole, Eptifibatide, Prasugrel, Ticagrelor, Tirofiban, Vorapaxar. The coatings may also comprise any other type of substance with antithrombotic, antiplatelet or antibacterial features, such as sortase A, perfluorocarbon and more. The coatings may also be combined with an implantable vibration device comprising certain materials that are antibacterial orantithrombotic. For example, some metals have shown to be antibacterial. In case the implant or at least the outer surface of the implant ismade of such a metal, this may be advantageous in order to reduce bacterial infections. The medical implant or the surface of the implant may be made of any other suitable metal or material. The surface may for example comprise any of the following metals or any combination of the following metals: titanium, cobalt, nickel, copper, zinc, zirconium, molybdenum, tin or lead. An implantable vibration device can also be coated with a local and slow-releasing anti-fibrotic or antibacterial drug in order to prevent fibrin sheath creation and bacterial inflammation. The drug or medicament may be coated on the surface and arranged to slowly release from the implant in order to prevent the creation of fibrin or inflammation. The drug may also be covered in a porous or soluble material that slowly disintegrates in order to allow the drug to be administered into the body and prevent the creation of fibrin. The drug may be any conventional anti-fibrotic or antibacterial drug. Figs.9’c and 9’d show different micro patterns on the surface of an implantable vibration device t. In order to improve blood compatibility, the implant material’s physical structure may be altered or controlled. By creating a certain topography on the surface of animplant, fibrin creation and inflammatory reactions may be inhibited. Fig.9’c is an example of a micro pattern that mimics the features of sharkskin. The micro pattern may have many different shapes and many different depths into the surface of the implant and they may be a complement to other coatings or used individually. In Fig.9’d another example of a micro pattern is disclosed.[0001] The micro pattern may, for example, be etched into the surface of the implantable medical device prior to insertion into the body. The surface of the implantable medical device may for example comprise a metal. The surface may for example comprise any of the following metals, or any combination of the following metals: titanium, cobalt, nickel, copper, zinc, zirconium, molybdenum, tin or lead. This may be advantageous in that these metals have proven to be antibacterial which may ensure that the implant functions better when inserted into the host body. In some examples, there may be provided a stimulation device comprising an electrode arrangement on an outer surface of thecasing 120. Stimulation devices suitable for provision on the outer surface of the casing 120 are described in relation to Figs. 20–22’’’d. The vibration generating unit VGU is configured to cause the implantable vibrator to vibrate, so that it is capable of temporarily displacing tissue of the patient when the vibrator is in its implanted position in the body. The vibrations provided by the vibration device can generally be defined by their frequency, their period and by their amplitude. The frequency denotes the number of complete cycles of vibration occurring per period of time. The vibration generating unit VGU can be configured to cause the implantable vibrator to vibrate with a frequency in the range of from 0.01 Hz to 10.000 Hz. It has been found that a vibration frequency in the range of 1 – 200 Hz, such as in the range of 1 – 150 Hz, such as in the range of30 – 150 Hz, preferably in the range of 35 – 150 Hz, such as in the range of 35 – 100 Hz, such as in the range of 60 – 100 Hz has proven advantageous for activating at least some of the mechanoreceptors responsible for at least part of the control of satiety in the patient. In some embodiments, the implantable vibration device is configured to vibrate with a period of 0.01 – 1 second, such as of 0.05 –1 second. The period of the vibration is defined as the time it takes for the vibration to complete its cycle. In some embodiments, vibration generating unit VGU is configured to cause the implantable vibrator 110 to vibrate at an amplitude of at least 0.01 mm. In some embodiments the vibration generating unit VGU is configured to cause the implantable vibrator 110 to vibrate atan amplitude of from 0.01 mm – 30 mm. The amplitude is defined as the maximum displacement of the mass center of the vibration device 110 from its resting position. Preferably, the vibration device 110 is provided its invaginated position such that it can displace tissue of the stomach or intestine wall a distance approximately corresponding to the amplitude of the vibrations. A displacement of tissue of at least 1 mm has been found sufficient to activate the relevant mechanoreceptors in the stomach. Preferably, the implantable vibration device is configured to vibrate at an amplitude of at least1 mm, such as of at least 2 mm,such as of at least 3 mm, such as at of at least 4 mm, such as at least 5 mm, such as at least 6 mm. In some embodiments, the vibrationgenerating unit VGU is configured to cause the implantable vibrator 110 to vibrate at an amplitude in the range of 1 – 10 mm, such in therange of 1- 5 mm, preferably 2 -4 mm. This means that tissue which abuts the vibration device in the implanted position can displaced a corresponding length by each vibration cycle. In some embodiments, the vibration device has a mass of at least 10 g. A sufficient mass is preferred such that a sufficient forcecan be delivered to the tissue for activating at least some of the mechanoreceptors in the stomach. A sufficient mass is preferred such that vibrations stimulation can be provided to the sexually responsive tissue of a female patient. The vibration generating unit is preferably operated by a mechanism based on the inverse piezoelectric effect. The vibrationsmay be caused a piezoelectric material by various mechanisms, such as those exemplified in the following. Stated differently, the vibration generating unit VGU preferably comprises as least one piezoelectric material configured to generate the vibrations. The piezoelectric effect is a property of certain solid materials to generate an electrical voltage in response to an applied mechanical stress (so-called direct piezoelectric effect) and to deform elastically in response to an applied electrical voltage (so-calledinverse piezoelectric effect). The piezoelectric effect is a reversible process, meaning that materials exhibiting the direct piezoelectric effect also exhibit the inverse piezoelectric effect. Materials exhibiting the piezoelectric effect are denoted as piezoelectric materials. Examples of piezoelectric materials comprise: crystalline materials, such as lithium niobate, lithium tantalate and quartz; ceramics, such as lead zirconate titanate, potassium niobate and barium titanate; polymers, such as polyvinylidene fluoride. Piezoelectric coefficients are a fundamental property of piezoelectric materials. A given piezoelectric material is characterized by a set of piezoelectric coefficients, wherein a piezoelectric coefficient is a measure of the relationship between the applied mechanical stress along a first direction and the generated electric charge along a second direction. Piezoelectric coefficients are usually expressed in units of picocoulombs per newton (pC/N). The value of piezoelectric coefficients may strongly vary depending on the piezoelectric material and piezoelectric coefficient being considered. For example, the d33 piezoelectric coefficient is commonly reported for piezoelectric materials and quantifies the electric charge generated along a given direction in response to the mechanical stress applied along the same direction. A piezoelectric motor or piezo motor is a type of electric motor that uses the inverse piezoelectric effect to generate mechanical motion, typically linear or rotatory motion. Piezo motors are often used in applications where precise positioning and fine control ofmovement are required. Piezo motors have the advantage of providing high motion accuracy, being possible to miniaturize and being relatively immune to interference, such as electromagnetic interference. Piezoelectric motors can also be manufactured without magnetic and/or metallic parts, and instead be manufactured from ceramics or certain composites. This feature is particularly advantageous inmedical and biotechnology applications with strong magnetic fields. Piezoelectric motors can thus be made MRI-safe, meaning that the patient can undergo Magnetic Resonance Imaging (MRI) while having the piezo motor implanted. MRI is a medical imaging technique used to form pictures of the anatomy and the physiological processes of the body using strong magnetic fields. Conventional implantable electromagnetic motors prevent the use of MRI as the strong magnetic field risks damaging both the patient and the implant. Also, compared to classical electromagnetic motors, piezo motors may have a simpler structure and smaller footprint. Piezo motors may offer improved positioning accuracy and simpler design, as linear motion may be obtained directly, without the need of mechanical coupling elements otherwise required to convert the rotary motion of classical electromagnetic motors to linear motion. That linear motion can be obtained directly may improve the positioning accuracy. An additional advantage of piezoelectric motors is that they usually feature higher energy-efficiency and less power consumption compared to conventional electromagnetic motors. As discussed in more detail in the sections below, inchworm motors, inertial motors, walk-drive and ultrasonic motors are three common types of piezoelectric motors Fig. 10 shows an embodiment of an inchworm motor MO configured to generate linear motion. The inchworm motor is configured to acts as at least part of a vibration generating unit VGU. The inchworm motor MO comprises a first lateral piezoelectric actuator 801a and second lateral piezoelectric actuator 801b. The first lateral piezoelectric actuator 801a is laterally connected to a first clutching actuator802a’ and a second clutching actuator 802a’’. The second lateral piezoelectric actuator 801b is laterally connected to a third clutchingactuator 802b’ and a fourth clutching actuator 802b’’. The inchworm motor MO is configured to impart a linear motion to a movablemember 805. The movable member 805 may be configured to be attached to a load or to the casing of the implantable vibration device 110,so that it can cause the implantable vibration device 110 to vibrate. Fig. 11 illustrates an operation cycle of the piezoelectric inchworm motor MO wherein the movable member 805 is linearly moved in a direction to the right in the illustration by sequentially controlling the first and second piezoelectric actuators 801a, 801b and the clutching actuators 802a’, 802a’’, 802b’, 802b’’. In an initial relaxation state, the movable member 805 is detached from all the clutchingactuators 802a’, 802a’’, 802b’, 802b’’. The inchworm motor MO is subsequently brought into an initialization state by electrically activating the second and fourth clutching actuators 802a’’, 802b’’. As a result, the clutching actuators 802a’’, 802b’’ extend and clutch the movable member 805. In step 1, the first and second lateral actuators 801a, 801b extend in response to an applied electrical voltage. As a result, the movable member 805 undergoes a first linear displacement with a distance equal to half the distance of the extension of the lateral actuators 801a, 801b. In step 2, the first and third clutching actuators 802a’, 802b’ are electrically activated. As a result, the first and third clutching actuators 802a’, 802b’ extend and clutch the movable member 805. In step 3, the electrical voltage applied to the third and fourth clutching actuators 802a’’, 802b’’ is decreased as compared to the initialization state. As a result, the third and fourth clutching actuators 802a’’, 802b’’ detach from the movable member 805. In step 4, the electrical voltage applied to the first and second lateral actuators 801a, 801b is decreased as compared to step 1. As a result, the first and second lateral actuators 801a, 801b contract and the movable member 805 undergoes a second linear displacement with a distance equal to half the distance of the contraction of the lateral actuators 801a, 801b. In step 5, the second and fourth clutching actuators 802a’’, 802b’’ are electrically activated such that they extend and clutch the movable member 805. In step 6, the electrical voltage applied to the first and second clutching actuators 802a’, 802b’ is decreased as compared to step 2. As a result, the first and second clutching actuators 802a’, 802b’ contract and detach from the movable member 805. A reversal of the applied electrical voltages will reverse the steps 1 to 6. This will cause the moveable member to move in the opposite directions, towards its starting position. Thus, by alternating between a first voltage and a second, reversed voltage, a back-and- forth movement of the moveable member can be obtained. By coupling the moveable member to a load or by connecting the moveable member to the casing of the implantable vibrator, the back-and-forth motion of the moveable member can cause the implantable vibrator to vibrate. In alternative embodiments, the movable member 805 may be replaced with a rotary module (not shown) such that the inchwormmotor can be configured to generate rotary motion. Such an inchworm motor could then be used to rotate an eccentric mechanism tothereby cause vibrations in the implantable vibration device 110. Such a vibration generating unit VGU configurations configuration are described in greater detail in relation to Figs.15a and 15b. The inchworm motor is configured to generate a linear motion at a speed in the range 1 mm/s to 10 mm/s, a stroke length in therange 1 mm – 30 mm and a force in the range 2 N – 30 N. Fig. 12 illustrates an embodiment of a piezoelectric inertial motor MO configured to generate linear motion. The piezoelectrical inertial motor is configured to acts as at least part of a vibration generating unit VGU. The motor MO comprises a movable member 805, a piezoelectric actuator 801, a recoiling member 804 and a base 806. The movable member 805 is attached to the piezoelectric actuator 801. The piezoelectric actuator 801 is attached to the recoiling member 804. The movable member 805 is in contact with the base 806. The movable member 805 is configured to be attached to the load or mechanism to be moved. An operation mode of the piezoelectric inertial motor MO described in Fig.12 comprises two steps. In step 1, the piezoelectric actuator 801 slowly elongates in response to an applied voltage. Due to the static friction between the movable member 805 and the base806, the movable member 805 does not move. In step 2, the piezoelectric actuator 801 rapidly contracts in response to a change in the applied voltage. As a result of the recoil produced by the recoiling member 804, the movable member 805 moves by a distance Δx to the leftin the illustration of Fig. 12. By reversing the operation cycle, the piezoelectric inertial motor MO generates motion in the opposite direction. Thus, a back- and-forth movement of the moveable member 805 can be obtained. By coupling the moveable member to a load or to the casing of the implantable vibration device, the implantable vibration device can be caused to vibrate. In the embodiment shown in Fig.12, the piezoelectric inertial motor MO is configured to generate linear motion may feature aspeed in the range 1 mm/s to 10 mm/s, a stroke length in the range 1 mm – 30 mm and a force in the range 2 N – 30 N. In alternative embodiments of piezoelectric inertial motors (not shown), the movable member 805 may be replaced with a with a rotary module such that the piezoelectric inertial motor is configured to generate rotary motion. Piezoelectric inertial motors configured togenerate rotary motion may have a rotational speed in the range 1 mrad/s – 100mrad/s and a torque in the range 100 Nmm – 900 Nmm. Insuch embodiments, the rotating piezoelectric inertial motor could be used as the rotational motor described with reference to Figs. 15A and 15B. Yet another design of a piezoelectric motor suitable for use in the implantable medical device described herein is the walk-drive motor. Walk-drive motors take their name from the fact that their working principle essentially resembles a walk. Linear motion is achieved through the coordinated and sequential action of a number of piezoelectric actuators acting as legs. Fig. 13 shows an embodiment of a piezoelectric walk-drive motor MO configured to acts as at least part of a vibration generatingunit VGU. The piezoelectric walk-drive motor MO comprises a number of piezoelectric actuators 801a – 801d attached to a supportingmember 800. The piezoelectric actuators 801a – 801d may be divided into a first set 801a, 801c and a second set 801b, 801d. The first and second set 801a, 801c and 801b, 801d of piezoelectric actuators may be controlled independently. The piezoelectric walk-drive motor MO isconfigured to impart a linear motion to a movable member 805 by sequentially controlling the piezoelectric actuators 801a – 801d. Themovable member 805 is configured to be attached to the load or mechanism to be moved. A piezoelectric walk-drive motor 805 may be operated in various operation modes, each offering specific advantages in terms of performance. Fig. 14 illustrates an operation cycle of a piezoelectric walk-drive motor MO according to one embodiment. In this embodiment, the first set of piezoelectric actuators 801a, 801c is controlled by a first electrical voltage ^^. The second set of piezoelectric actuators 801b, 801d is controlled by a second electrical voltage ^^. The cycle comprises a number of steps. In step 1, in response to a change in ^^, the first set of piezoelectric actuators 801a, 801c stretch and make contact with themovable member 805. When in contact, the first set of piezoelectric actuators 801a, 801c are bended sideways in a direction opposite to themotion direction D. Conversely, the second set of piezoelectric actuators 801b, 801d detach from the movable member 805 in response to a change in ^^. In step 2, the first set of piezoelectric actuators 801a, 801c maintain contact with the movable member 805 and bend in the motion direction D in response to a change in ^^. The second set of piezoelectric actuators 801b, 801d remain detached from the movable member 805. As a result of the friction between the first set of piezoelectric actuators 801a, 801c and the movable member 805, the movable member 805 is moved in the motion direction D. In step 3, in response to a change in ^^, the second set of piezoelectric actuators 801b, 801d stretch and make contact with the movable member 805. When in contact, the second set of piezoelectric actuators 801b, 801d are bended in a direction opposite to themotion direction D. Conversely, the first set of piezoelectric actuators 801a, 801c detach from the movable member 805 in response to a change in ^^. In step 4, the second set of piezoelectric actuators 801b, 801d maintain contact with the movable member 805 and bend in themotion direction D in response to a change in ^^. The first set of piezoelectric actuators 801a, 801c remain detached from the movable member 805. As a result of the friction between the second set of piezoelectric actuators 801b, 801d and the movable member 805, the movable member 805 is moved in the motion direction D. The piezoelectric actuators 801a – 801d in Fig. 14 and Fig. 15 may be bimorph piezoelectric actuators. A bimorph actuator comprises at least two piezoelectric layers bonded together and oppositely responding to a given applied voltage. E.g., one layer extends andthe other contracts. As a result, the bimorph actuator may stretch and bend. Alternatively, any of piezoelectric actuators 801a – 801d in Fig.14 and Fig. 15 may comprise a top part (illustrated as 801a’ in fig. 5), configured to be attached to the supporting member 800, and a bottom part (exemplified by illustration as 801a’’ in fig.4). The top part 801a’ is configured to deform perpendicularly to the motion direction D in response to the voltage applied to the piezoelectric actuator 801a. The bottom part 801a’’ is configured to deform parallelly to the motion direction D in response to the voltage. As a result, the piezoelectric actuator 801a may stretch and bend. By reversing the operation cycle, the piezoelectric walk-drive motor MO generates motion in the opposite direction. Thus, a back-and-forth movement of the moveable member 805 can be obtained. By coupling the moveable member to a load or to the casing 120 of theimplantable vibration device 110, the implantable vibration device can be caused to vibrate.In the embodiment shown in Fig. 13 and Fig. 14, the piezoelectric walk-drive motor MO is configured to generate linear motion at aspeed in the range 1mm/s to 10mm/s and a force in the range 2N – 30N. As the maximum stroke is limited by the length of the movablemember 805 (also called a runner), there is no set limit for the maximum stroke. In alternative embodiments of the piezoelectric walk-drive motor (not shown), the movable member 805 may be replaced with a with a rotary module such that the piezoelectric walk-drive motor is configured to generate rotary motion. Piezoelectric walk-drive motorsconfigured to generate rotary motion may have a rotational speed in the range 0,5 mrad/s to around 70 mrad/s and a torque ranging fromaround 100 Nmm to around 900 Nmm. In such embodiments, the rotating piezoelectric walk-drive motor could be used as the rotationalmotor described with reference to Figs.15 a-b. Figs.15A and 15B schematically show an implantable vibration device 110. Figs.15A and 15B differ in the shape of the casing 120. Fig.15A shows a substantially cylindrical casing. Fig.15B shows a substantially spherical casing. Of course, other casing shapes suitable forimplantation in the human body are also contemplated. The implantable vibration devices 110 are suitable for at least partial or complete invagination in the stomach tissue. The implantable vibration device comprises a casing 110 which contains a vibration generating unit VGU. Herein, the vibrationgenerating unit VGU is based on an eccentric mechanism for causing the implantable vibration device to vibrate. The vibration generatingunit comprises motor 604, a first motor axis 606, an eccentric element 608 eccentrically mounted to the first motor axis 606, a secondaxis 610 which suitably is supported by a bearing mounted to the casing 120. The vibration generating unit VGU may comprise a gear box 611 that transforms the speed of rotation of the motor 604 to a suitable speed. Upon operation of the motor 201, the eccentric element 608 will rotate eccentrically about the first axis 606, to thereby cause the implantable vibration device to vibrate. The operation of the motor is preferably operated by the internal control unit CI. The motor is preferably powered by energy received wirelessly by the energy transmitter T. Another option for causing vibrations in the implantable vibration device it to mount a weight on the motor 604 via an axis 606, wherein said axis is attached to the weight at a position offset from the center of the weight. Upon rotation of the weight, the implantable vibration device will be made to vibrate. All parts of the vibration generating unit VGU, including the motor 201 are preferably made of materials compatible with MRI scanning. Consequently, the VGU does not comprise any metallic and/or magnetic parts, and can instead by manufactured by polymeric and/or ceramic materials. Alternatively, in other embodiments, the motor 201 can be an electromagnetic motor, such as a brushless DC motor. In some embodiments, the motor 604 may be an inchworm motor with a rotatable module. In some embodiments, the motor 604 may be a piezoelectric inertial motor with a rotary module. In some embodiment, the motor 604 may be a walk-drive motor with a rotary module. In some embodiments, the motor device 604 is a rotary ultrasonic motor, such as a traveling wave ultrasonic motor (TWUSM)shown in greater detail in Fig. 16 or a standing wave ultrasonic motor (SWUSM) shown in greater detail in Fig. 17. A rotary ultrasonic motor is a piezoelectric ultrasonic motor configured to generate rotary motion. Rotary ultrasonic motors comprise traveling wave ultrasonic motors (TWUSM) and standing wave ultrasonic motor (SWUSM). In TWUSMs the stator vibrates according to a travelling wave pattern. In SWUSMs the stator vibrates according to a standing wave pattern.Fig. 16 shows an embodiment of a TWUSM MO, configured to acts as at least part of a vibration generating unit VGU. The TWUSM MO comprises a ring-shaped stator 810 with a top and a bottom surface. The stator 810 is configured to engage with a ring-shaped rotor 811. The stator 810 comprises a ring-shaped member 810’, a first number of piezoelectric actuators 801a and a second number of piezoelectric actuators 801b. The piezoelectric actuators 801a, 801b are attached to the member 810’. An alternating electrical voltage VA may be applied from a first voltage generator 812a (typically a controller connected to an energy source) to the piezoelectric actuators 801a. An alternating electrical voltage VB, phase-shifted with respect to VA, may be applied to the from a second voltage generator 812b to the second number of piezoelectric actuators 801b. The ring-shaped member 810’ may comprise a number of teeth 813. The rotor 811 is configured to be attached to the load or mechanism to be moved. The first number of piezoelectric actuators 801a deform in response to the voltage VA such that they induce a first vibration pattern in the stator 810. The second number of piezoelectric actuators 801b deform in response to the voltage VB such that they induce asecond vibration pattern in the stator 810. The interference of the first and second vibration pattern excites a travelling wave 814 in the stator 810. The travelling wave 814 has a given propagation direction D^, either clock-wise or counter-clockwise. The regions of maximumdisplacement – so-called antinodes – and regions of no displacement – so-called nodes – of the travelling wave pattern oscillatetransversely with respect to the top and bottom surface of the stator 810, but they also travel circumferentially along the stator 810 perimeter. The propagation of the travelling wave 814 makes the stator vibrate accordingly. As a result, the stator 810 imparts a rotatory motion to the rotor 811 in a rotation direction D2, opposite to the travelling wave 814 propagation direction D1. The teeth 813 facilitate the motion transmission from the stator 810 to the rotor 811 by enhancing the friction between the rotor 811 and the stator 810. The frequency and amplitude of the applied electrical voltages may be controlled and adjusted to tune the performance of the TWUSM MO, including speed, direction and accuracy of motion. In contrast to TWUSMs, a standing wave ultrasonic motor (SWUSM) requires only a single alternating electrical voltage to operate. In response to this applied voltage, the piezoelectric actuators 801a, 801b of the stator 810 make the stator 810 vibrate accordingto a standing wave pattern. A standing wave is characterized by antinodes and nodes that do not travel in space. As a result, a standing wave does not have a propagation direction. The stator 810 vibrates in a way that antinodes and nodes oscillate transversely with respect to the top and bottom surface of the stator. However, antinodes and nodes do not travel circumferentially along the stator. Fig. 17 shows an embodiment of a SWUSM, configured to acts as at least part of a vibration generating unit VGU. The SWUSM MO comprises a ring-shaped stator 810 with a top and a bottom surface. The stator 810 is configured to engage with a ring-shaped rotor 811. The stator 810 comprises a first set of piezoelectric actuators 801a and a second set of piezoelectric actuators 801b. An alternating electrical voltage may be selectively and exclusively applied to either set of piezoelectric actuators 801a, 801b while the other set is leftfloating. In such a case, the set to which the voltage is applied is referred to as active, while the other set is referred to as free. The stator810 comprises a number of protrusions 815. The stator 810 is configured to engage with the rotor 811 via the protrusions 815. The rotor 811 is configured to be attached to the load or mechanism to be moved. A standing wave vibration pattern may be excited in the stator 810 in response to the applied voltage. As a result, the protrusions 815 oscillate at a first angle with respect to the top surface of the stator 810 when the piezoelectric actuators 801a are active. The protrusions 815 oscillate at a second angle with respect to the top surface of the stator 810 when the piezoelectric actuators 801b are active, with the second angle different from the first angle. The first angle is such that the stator 810 imparts a clockwise rotary motion to the rotor 811. The second angle is such that the stator 810 imparts a counter-clockwise rotary motion to the rotor 811. In the embodiment shown in fig. 18, the rotary ultrasonic motor MO has a rotational speed in the range 10 mrad/s - 10,000mrad/s. and produces a torque in the range 20 Nm – 450 Nm. Rotary ultrasonic motors, such as the SWUSM or TWUSM configured to generate rotary motion could be used as the rotational motor described with reference to Figs.15A-15B. Fig. 18 shows an embodiment of a linear ultrasonic motor MO, configured to acts as at least part of a vibration generating unit VGU. The linear ultrasonic motor MO comprises a piezoelectric actuator 801, a pushing member 816, and a movable member 805 (or slider). The piezoelectric actuator 801 vibrates at its resonance frequency in response to an applied alternating voltage. The piezoelectric actuator 801 is attached to the pushing member 816. As a result of the vibrations in the piezoelectric actuator 801, the pushing member 816 alternatively contacts the movable member 805 and makes it move linearly by frictional coupling. By reversing the operation cycle the moveable member can be caused to move in the opposite direction. Thus, a back-and-forth motion can be obtained by alternating the direction of the operation cycle. Back-and-forth motion of the moveable member 805 can be utilized to generate vibrations in an implantable vibration device, by attaching the moveable member 805 to a casing in an implantable vibration device as shown herein, to thereby transfer the vibrations to the casing. In the embodiment shown in Fig. 18, the linear ultrasonic piezo motor MO is configured to generate linear motion with a speed inthe range 4 mm/s to 100 mm/s and a force in the range 0.5 N – 30 N. As the maximum stroke is limited by the length of the movablemember 805 (also called a slider), there is no set limit for the maximum stroke. Fig. 20 illustrates an alternative mechanism suitable for a vibration generating unit, which is also based on a piezoelectric motor.In Fig. 20, there is a shown a schematic cross-sectional view of implantable vibration device 110 according to the present invention. Fig. 20shows a simple design of a vibration generating unit VGU which comprises a piezoelectric material 101 sandwiched between a respective electrode layers 102a, b, preferably comprised of copper foils. Each electrode layer comprises a tab which extends outside the footprint of the piezoelectric material, which allows for further electrical connections in the form of leads connected to the wireless energy receiver R and/or controller CI. The energy transfer from the energy receiver R to the vibration generating unit is typically controlled by an internal controller CI. The piezoelectric material 101 is configured to extend in response to an applied electrical voltage controllable by the internal controller CI, or by an external controller. Once the voltage is removed or reversed, the piezoelectric material 101 contracts to its relaxed state. Consequently, by alternatingly applying and removing (or reversing) a voltage over the piezoelectric material, the material can be made to expand and contract at a frequency which corresponds to the frequency of the alternating voltage. If this is performed at a certain frequency, the alternating expansion and contraction can cause an implantable vibration device to vibrate at a corresponding frequency. The vibration generating unit is attached to the casing 120 of the implantable vibration device 110 via attachment means 104, suchthat the expansion and contraction movement of the piezoelectric material in the vibration generating unit can be transferred to the casing and thereby cause the implantable vibration device 110 to vibrate. The electrode-piezoelectric material-electrode configuration is sandwiched between a pair of insulators 103a, 103b of e.g. alumina. FEEDBACK OBESITY Figure 20 is a schematic illustration of a vibration device 110 configured to deliver a signal to a vagal afferent 231 innervating an stomach tissue 230 of a patient. The vibration device 110 may form part of a system comprising a sensor device 250 configured to generate a sensor signal indicating the response in the celiac vagus nerve, illustrated herein as part of the CNS 233, as well as a control unit, or controller 240, operable to receive the sensor signal and to control an operation of the vibration device 110 based at least in part on the sensor signal. For illustrative purposes, the stimulation signal is in the present figure applied by means of an electrode arrangement 210 arranged to touch the nerve 231. However, the stimulation signal could just as well be applied to the stomach tissue 230 instead. Theexemplary electrode arrangement 210 may be a unipolar electrode, comprising a first stimulation electrode 211 that may act as a cathode or anode. Another electrode (not shown) may be provided elsewhere to close the electric circuit. This circuit-closing electrode may, for example, be formed by a portion the casing 120 of the vibration device 110 shown in Fig.9a and 9B. It will however be appreciated that other configurations of the vibration device 110 and the electrode arrangement(s) 210 are possible. The sensor device 250 may be configured to measure the neural response in various ways. The sensor device 250 may beconfigured to employ one or more electrodes for measuring an electrical characteristic of the celiac vagus nerve. The control unit 240 may be operable to compare the response measure with a predetermined reference measure and to control the vibration device 110 based on the comparison to adjust or maintain a desired response in the celiac vagus nerve 230. The control unit 240 may, for example, increase an intensity of the vibrations in response to the response measure being below the reference measure and to reduce the intensity of the vibrations in response to the response measure exceeding the reference measure. The control unit 240 may thus operate as a closed-loop controller, or feedback controller, using information carried by the sensor signal as feedback when controlling the operation of the vibration device 110 in a control loop. The control unit 240 may be configured to increase the intensity of the stimulation signal by increasing at least one of a frequency, amplitude, and period of the vibrations. Further, the control unit 240 may be configured to reduce the intensity of the stimulation signal by reducing at least one of the frequency, amplitude, and period of the vibrations of the vibrations. The predetermined reference measure may be based on a previous measurement of the celiac vagus nerve in the patient, and/or on previous measurements of celiac vagus nerve responses in other patients. The control unit 240 may be configured to monitor the level of celiac vagus nerve over time, and to control the stimulation device based on a change rate in celiac cagus nerve response over time. Thus, the control unit 240 may be arranged to calculate a time derivative of the celiac nerve response and control the operation of the vibration device 110 accordingly. It will be appreciated that the response measure in some examples may be used to determine a calibration parameter of the vibration device 110. The determination of the calibration parameter may form part of a calibration process, which may be performed inconnection with implantation of the stimulation device 40. The calibration process may also be performed intermittently or on a regular basis, for example upon request by a healthcare professional. The calibration parameter may indicate an offset needed to adjust a characteristic of the stimulation signal, such as a voltage, frequency, or current, to achieve a desired level of effector response. Thecalibration process may hence be performed to ensure proper operation of the stimulation device 40 and increase the prospects of a desired and predictable effect of the applied stimulation signal.STIMULATION KIT (ADAPTED FOR OBESITY) In an embodiment, there is provided a stimulation device for delivering electrical stimulation to tissue in the stomach of the patient, to generate a signal in the vagal afferents innervating the stomach tissue, to thereby create a sensation of satiety and/or reducethe appetite in a patient. It is contemplated that the vibration device disclosed in the embodiments shown in Figs.1–5 could be replaced orcomplemented by a stimulation device, as will be described in more detail in the following. An exemplary system for generating a signal in the vagal afferents innervating the gastric musculature in the stomach of a patient will now be discussed with reference to Figs 21a-e. Fig.21a is a schematic illustration of a particular example of the system and its interaction with the body of the patient P, and more particularly with an stomach tissue 230 innervated by a vagal afferent 231. As indicated in the figure, the vagal afferent 231 may extend between the stomach tissue 230 and the central nervous system (CNS) 233. In the presentexample, the origin of the illustrated nerve 231 is represented by item 233. It will be appreciated that the stomach tissue 230 and the CNS 233 are merely schematically indicated in the present figure. As illustrated, the system comprises a stimulation device 40 configured to deliver, directly or indirectly, a first simulation signalto the vagal afferent 231 innervating stomach tissue 230. This can be achieved by delivering stimulation directly to the vagal afferent, or to the tissue of the stomach. The system further comprises a control unit, or controller 240, configured to control an operation of thestimulation device 40 such that the stimulation signal stimulates an activity of the vagal afferent 231. A signal that results in an activation ofthe nerve may be referred to as an activation signal. By activation is generally understood the generation of a nerve signal, i.e., action potentials travelling in the nerve. The nervous response may typically be determined by, inter alia, a frequency content of the signal. The signal may be a periodic signal, including at least one of: a variable frequency component, a variable duty cycle component, a variable amplitude component, and a variable pause component. It may therefore be beneficial to measure the effect of the stimulation to determine whether the treatment has an intended effect or not and to provide feedback that can be used to adjust the characteristics of the stimulation signal. For example, the measured effectmay be used as feedback in a closed loop control of the stimulation device 40. This will be discussed in further detail later in the present disclosure. A stimulation signal may have different characteristics depending on the desired neural response to be achieved. As already mentioned, these characteristics may relate to amplitude, frequency, waveform, polarity, and duty cycle. The duty cycle may be understood as the ratio of the time that the signal is ‘on’, i.e., active, to the total time of one cycle (period). For a pulsed signal, this would correspond to the ratio of the pulse length to the length a cycle. The duty cycle is usually expressed as a percentage or a fraction. For example, a 50% duty cycle may be understood as the signal being ‘on’ for half of the cycle and ‘off’ for the other half. The duty cycle of an electric stimulation signal can influence the energy delivered to the tissue (or at least the energy to which the tissue is exposed). A higher duty cycle means that the tissue may be exposed to more electric charges and energy, which can increase the stimulation effect, whereas a lower duty cycle means that the tissue may be exposed to less electric charge and energy. A lower duty cycle may mean that the tissue has more time to recover and adapt to the stimulation, which can reduce the risk of tissue damage or fatigue. Different types of tissues may require different duty cycles for optimal stimulation. Electric stimulation signals with low duty cycles (less than 10%) have been shown to promote cell regeneration, proliferation, and growth, whereas electric signals with high duty cycles (more than 50%) have been shown to inhibit cell growth.. Accordingly, the pause component of a stimulation signal, describing the time interval between two consecutive pulses or twoconsecutive pulse trains, can affect the stimulation of tissue in several ways. Increasing the pause component may facilitate recovery from the previous stimulation and reduce the risk of overstimulation or fatigue. A longer pause component can reduce the risk of tissue damage or adaptation, while a shorter pause component can increase the stimulation effect. Furthermore, the pause component may influence the net charge delivered to the tissue and the electrochemical reactions at the electrode–tissue interface. A longer pause component can allow the charge to dissipate and the pH to normalize, while a shorter pause component can cause charge accumulation and pH changes. The pause component may in some examples range from 0.1-10 seconds, such as 0.5-2 seconds, depending on the tissue type. In an example the stomach tissue 230, innervated by the vagal afferent 23, or the vagal afferent itself 231 can be activated or stimulated by an activation signal comprising a frequency in the range of 0.1-100 Hz, such as 1-50 Hz. Such a signal may be referred to as alow-frequency signal. The activation signal may comprise a voltage in the range of 1-15 V, such as about 10V and a current in the range of 1- 50 mA, such as 2-4 mA. The control unit 240 may be configured to control the operation of the stimulation device 40. The control unit 240 may as well be configured to control the operation of the stimulation device 40 to provide a signal for activating the vagal afferent 231 innervating the stomach tissue 230. The stimulation device 40 may comprise circuitry and a power source for generating the stimulation signal electrical stimulation signals. The circuitry and, optionally, the power source may be arranged within a housing which may be implantable in the body of thepatient. Electrical leads may be provided to connect the circuitry to a signal generating means 210 arranged at the stomach tissue. In caseof an electric stimulation signal, the signal generating means 210 may comprise an electrode arrangement. At least parts of the stimulation device 40, such as a housing and/or energy source, may be implanted in the stomach tissue may be implanted in fat tissue of the patient, be anchored to bone tissue, or implanted subcutaneously. The control unit 240 may be integrated with the stimulation device 40, such as arranged within the same housing as the electriccircuitry, or the energy source mentioned above. In other examples, the control unit 240 may be arranged separately or remotely, i.e., at a different physical location than the stimulation device 40. In the latter case, the control unit 240 may be communicatively coupled to the stimulation device 40 by means of a wired or wireless connection. The control unit 240 may hence be arranged within the patient’s body or externally, i.e., outside the body of the patient P. In some embodiments, signal generating means being an electrode arrangement 210 may be provided on the outer surface of the casing 120 of the implantable vibration device 110 shown in figs.16A and B, and utilized in the embodiments described in relation to Figs.1–5.In this embodiment, the signal generating means being an electrode arrangement 210 may utilize the same controller CI and/or CE as the vibration device 110. Figures 21b-e show examples of electrode arrangements which may be implemented in any of the stimulation devices 40 discussed in the present disclosure. These may be provided on the outer surface of the casing 120 of the vibration device 110 of Figs.15A and 15B, to be used in the embodiments described in relation to Figs.1–5. Figure 21b is an example of a bipolar electrode arrangement comprising a first and a second electrode element E1, E2, having a plurality of contact portions 122a which can be arranged to abut the vagal afferent 231, or be arranged to touch the stomach tissue 230 innervated by the vagal afferent 231. The electrode arrangement may be operated as a bipolar electrode arrangement by connecting the first and second electrode elements E1, E2 to different electrical potentials. Thus, the first electrode element E1 can be operated as an anode and the second electrode element E2 as a cathode. The electrode elements E1, E2 may be attached directly to a support structure 126, such as a patch, or a cuff 215 as shown in figure 21e, or the casing of the vibration device 110 shown in Figs.15A and 15B. The electrodearrangement may comprise one or several contact pads, or contacting portions 122a, for increasing the contact surface between the electrode and the tissue when implanted. During operation, the stimulation signal may be delivered to the tissue, i.e., the nerve or thestomach tissue, by means of the first and/or second electrode elements E1, E2 to activate action potentials in the nerve directly or tostimulate the stomach tissue 230 innervated by the vagal afferent 231. It may be contemplated that the electrode arrangement only comprises the first electrode element E1 Figure 21c is another example of an electrode arrangement of an electrical stimulation device 40 as discussed above. In the present example, the electrode arrangement may be operated as a unipolar electrode element or as a bipolar electrode arrangement. The electrode arrangement comprises a first electrode element E1 and a second electrode element E2 which may be formed of a wire orelectrical lead arranged in a flat, coiled structure for increasing the contact surface between the electrode elements E1, E2 and the nerve tissue. The electrode elements E1, E2 may be arranged on a flexible and/or stretchable support or patch 216, allowing it to conform to the shape of the tissue to which it is attached and move with any movement of the same. The coiled configuration allows for a certainmechanical flexibility of the electrode elements E1, E2 such that they can move with any movement or deformation of the support 215. It may be contemplated that the electrode arrangement only comprises the first electrode element E1 Figure 21d illustrates the end portion of a needle- or pin-shaped electrode element E1, wherein the active portion of the electrode element E1is provided as a bare electrode surface 123 at the end of the electrode element E1. Thus, when implanted at or in the tissue, the active, bare electrode surface 123 of the electrode element E1 may form a metal–tissue interface with the tissue. The tip 123 of the electrodeelement E1 may be inserted into the nerve tissue 231 or arranged to abut an outer surface of the nerve 231. The present example may form a unipolar electrode, and may require another electrode, such as a ground electrode, to be arranged elsewhere on the patient’s body to forma closed electric circuit. The completing electrode may, for instance, be formed by a housing of the stimulation device 40 or the vibration device 110. Figure 21e shows an electrode arrangement 210, 220 comprising a cuff 215 for attachment around the nerve 231, 232. The cuff 215 forms a support structure for the electrode element(s) E1, E2 and allows them to be touching the outer surface of the nerve 231. The cuff 215 may be configured to at least partly surround or enclose a circumference of the nerve 231, 232 and may comprise an opening or slit allowing the cuff 215 to be fitted around the nerve 231. One or more of the first and second electrode arrangements 210, 220 may comprise one or more of the electrode elements E1, E2 described above. The electrode elements E1, E2, which also may be referred to as stimulation electrodes, may be spaced apart along thevagal afferent nerve 231. This allows the stimulation device 40 to generate the stimulation signal(s) such that a first one of the stimulation electrodes E1, E2 serves as a cathode and a second one of the stimulation electrodes E1, E2 serves as an anode. It will be appreciated that further electrodes (not shown) may be provided, such as a third electrode, a fourth electrode, and a fifth electrode. Each of the third, fourth and fifth electrode may serve as an anode or a cathode during operation of the stimulation device 40 Various measures may be taken to ensure electrical safety and to comply with different regulatory frameworks. Direct current (DC) flowing through electrodes or other implanted parts of a system according to any of the aspects of the present disclosure may be asafety concern, as it may cause tissue damage. For example, it has been reported that DC levels as low as 2-3 µA may cause pathological changes in nerve tissue. It is therefore desirable to limit leakage current (DC) to 1µA or less, such a 0.1µA or less. This may be achieved by means of a capacitor, also referred to as a DC blocking capacitor, which may be arranged in any of the current pathways. Specifically, the capacitor may be connected in series with two or more electrodes of the implant, such as the ones employed to apply a stimulation signal or a measuring signal. Furthermore, the capacitor may be connected in series with a part of the implant (such as an electrode, an energy source, or a housing) and the body of the patient, thereby reducing any current that might flow between the implant and tissue of the patient. A further advantage of the capacitor relates to prevention of charge accumulation on the electrodes. By coupling a capacitor to the electrodes, the capacitor may help dissipating accumulated charge from the electrodes, thereby allowing them to ‘slide back’ to their operating potential range. The capacitor may be implemented in the circuitry of the medical device, such as the stimulation device 40 discussed above. The capacitor may hence be provided as a component on any of the PCBs 260 or provided separate from the PCB 260, discussed in further detail below. Figure 22a is a schematic illustration of a stimulation device 40 configured to deliver a signal in a vagal afferent 231 innervatingan stomach tissue 230 of a patient. The stimulation device 40 may form part of a system comprising a sensor device 250 configured to generate a sensor signal indicating the response in the celiac vagus nerve, illustrated herein as part of the CNS 233, as well as a controlunit, or controller 240, operable to receive the sensor signal and to control an operation of the stimulation device 40 based at least in parton the sensor signal. For illustrative purposes, the stimulation signal is in the present figure applied by means of an electrode arrangement210 arranged to touch the nerve 231. However, the stimulation signal could just as well be applied to the stomach tissue 230 instead. The exemplary electrode arrangement 210 may be a unipolar electrode, comprising a first stimulation electrode 211 that may act as a cathode or anode. Another electrode (not shown) may be provided elsewhere to close the electric circuit. This circuit-closing electrode may, forexample, be formed by a portion of a housing of the stimulation device 40 or the casing 120 of the vibration device 110 shown in Fig. 15A and 15B. It will however be appreciated that other configurations of the stimulation device 40 and the electrode arrangement(s) 210 are possible. The sensor device 250 may be configured to measure the neural response in various ways. The sensor device 250 may be configured to employ one or more electrodes for measuring an electrical characteristic of the celiac vagus nerve. Figure 22b shows an example in which the sensor device 250 comprises one or more sensor electrodes 251, 252 configured tomeasure an electric activity in the celiac vagus nerve 233 in response to the electrical stimulation signal. This approach may be referred toas electromyography, EMG. The electrode(s) may be arranged to measure the electric activity in the celiac vagus nerve 233. An increasedactivity in the celiac vagus nerve 233 may indicate that a similar bodily response of the stimulation has been obtained as would have beenobtained by distension of the stomach wall caused by eating. In the present example, a first sensor electrode 251 and a second sensorelectrode 252 are provided to generate the sensor signal. The voltage signal, indicating the response in the celiac vagus nerve 233, maytypically be in the range of 1-2 mV. The sensor electrode 251-254 of the sensor device 250 may be configured to be arranged at the celiac vagus nerve 230 orinserted into the celiac vagus nerve 230. The sensor electrode(s) 251 may in some examples be formed as one or more patch electrodesthat can be attached to the celiac vagus nerve 230. In some examples, the sensor electrode(s) 251 may be formed as needle electrodesarranged to protrude at least partially into the celiac vagus nerve 230. The sensor device 250 may further comprise a reference electrode, allowing the sensor signal to be based on an electrical interaction between one or more sensor electrode 251 and the reference electrode. The reference electrode may be formed by a housing of the stimulation device 40, and/or an electrode arranged at the effector tissue 230, spaced apart from the sensor electrode 211. As mentioned above, the sensor device 250 may in some examples comprise one or more mechanical sensor elements for measuring a mechanical characteristics or response. The sensor device 250 may, for example, be configured to measure mechanical movement in the effector tissue 230. Figure 22d shows an example of such a sensor device 250, which comprises a strain gauge formeasuring a contraction or relaxation of effector tissue 230 in response to the stimulation signal. Thus, the effector tissue 230 may be muscle tissue, such as smooth tissue. The strain may be positive (due to elongation of the muscle tissue) or negative (compressive, due to contraction of the muscle tissue). The strain gauge may be arranged to convert a change in dimension to a change in electrical resistance. In the present example, the strain gauge comprises a wire or foil 256 arranged in a grid pattern. During operation, the electrical resistance of the strain gauge may change in proportion to the deformation (and thus strain) experienced by the wire or foil pattern 256. An excitation voltage may be applied to the strain gauge and a sense voltage measured as an output voltage. As the resistance changes due to induced strain, the output voltage also changes. The present example comprises a metallic foil pattern 256 arranged on a flexible support 255, such as a thin silicone film 255. The flexible support, or support patch 255, can be attached to an outer surface of the effector tissue 230 to be measured. Due to the flexible nature of the support 255, it may deform and contract as the effector tissue 230 deforms and contracts, thereby causing the metallic foil pattern 256 to deform accordingly. The output from the sensor device 250 may be retrieved by the control unit 240, which may be configured to determine a response measure based on the sensor signal. The response measure may be understood as a measure indicative of the response in the celiac vagus nerve. Hence, the response measure may be a certain voltage, impedance, phase, resistance depending on the principle of operation used by the sensor device. In case of the sensor device 250 being an EMG sensor, the response measure may be a voltage, in case of an EIM sensor, the response measure may be an impedance and/or phase. The control unit 240 may be operable to compare the response measure with a predetermined reference measure and to control the stimulation device based on the comparison to adjust or maintain a desired response in the effector tissue 230. The control unit 240 may, for example, increase an intensity of the stimulation signal in response to the response measure being below the reference measure and to reduce the intensity of the stimulation signal in response to the response measure exceeding the reference measure. The control unit 240 may thus operate as a closed-loop controller, or feedback controller, using information carried by the sensor signal as feedbackwhen controlling the operation of the stimulation device 40 in a control loop. The control unit 240 may be configured to increase the intensity of the stimulation signal by increasing at least one of a frequency, current amplitude, and voltage amplitude of the stimulation signal. Further, the control unit 240 may be configured to reduce the intensity of the stimulation signal by reducing at least one of the frequency, current amplitude, and voltage amplitude of the stimulation signal. The predetermined reference measure may be based on a previous measurement of the effector response in the patient, and/or on previous measurements of effector responses in other patients. The control unit 240 may be configured to monitor the level of celiac vagus nerve over time, and to control the stimulation device based on a change rate in the effector response over time. Thus, the control unit 240 may be arranged to calculate a time derivative of the effector response and control the operation of the stimulation device 40 accordingly. It will be appreciated that the response measure in some examples may be used to determine a calibration parameter of the stimulation device 40. The determination of the calibration parameter may form part of a calibration process, which may be performed in connection with implantation of the stimulation device 40. The calibration process may also be performed intermittently or on a regular basis, for example upon request by a healthcare professional. The calibration parameter may indicate an offset needed to adjust a characteristic of the stimulation signal, such as a voltage, frequency, or current, to achieve a desired level of effector response. Thecalibration process may hence be performed to ensure proper operation of the stimulation device 40 and increase the prospects of a desired and predictable effect of the applied stimulation signal. A printed circuit board, PCB 260, may be employed to accommodate the circuitry and electrical components enabling the functionality of the system described above. Accordingly, at least one of the stimulation device 40, the source of energy, and the control unit 240 may supported by such as PCB. The PCB may be integrated in a housing or casing facilitating implantation in the body of the patient. Specific examples of PCBs 260 will now be discussed with reference to figures 22e-f. The PCB 260 serves as a physical platform for supporting and interconnecting electronic components of the system. The PCB 260 typically comprises a substrate 263 on which conductive paths 261 are etched or printed to establish electrical connections. Components such as resistors, capacitors, and integrated circuits such as ASICs may then be mounted on the substrate 263. The design and configuration of the PCB 260 depend on the intended application and site of implantation, with considerations for size and flexibility playing roles. Figure 22e shows an example of a multi-layer PCB 260, in which a plurality of substrate layers 263, each provided with its own set of conductive paths 261, are bonded together with layers of insulation. The multi-layer configuration reduces the footprint of the PCB 260, allowing for more functionality within the limited space of a medical implant such as the stimulation device 40. The layers 263 are interconnected through vias 262, which may be through-holes filled or plated with conductive material. The relatively compact design of the PCB 260, with the reduced footprint enabled by the multi-layered configuration, makes it possible to implant the device in locations where the available space is relatively restricted. The PCB 260 may also be of a flexible type, and or a stretchable type. Flexible PCBs are typically made using a flexible substrate, such polyimide or polyester film, which allows the PCB to conform to a specific shape or to flex during its use. This flexibility is particularly advantageous in medical implants that need to move of flex with the surrounding tissue, reducing the risk of damage to both the device and the tissue. Flexible PCBs can be single-layered or multi-layered and may, beneficially, be used in implants requiring adaptability to movement or specific anatomic contours. Stretchable PCBs may be fabricated from materials that can withstand stretching, such as silicone-based substrates with conductive paths that can withstand stretching. The conductive paths may, for example, be formed of silver-filled silicone, or a conductive path or wire that is arranged in a ‘serpentine’ trace. The serpentine trace may be characterized by its zigzag or wave-like pattern, effectively distributing mechanical stress over a larger area and absorbing deformations caused by the substrate moving or stretching. Figure 22f shows a particular example of a PCB 260 which is both flexible and stretchable. The PCB 260 comprises one or more flexible portions, such as flexible substrate portions 263, as well as one or more flexible portions comprising a stretchable substrate 264 with a conductive path 265 arranged in a wave-like pattern. In the present example, the PCB 260 comprises three flexible portions 263 interconnected by two stretchable substrate portions 264. The resulting arrangement is a PCB 260 that can conform to the specific shape of the tissue to which it is attached and adapt to movements such as contractions of the tissue. In further examples, two or more non- flexible portions (such as regular planar PCB portions or multi-layered PCB portions) may be interconnected by one or more flexible or stretchable portions to provide some flexibility/stretchability to the arrangement. Various measures may be taken to ensure electrical safety and to comply with different regulatory frameworks. Direct current (DC) flowing through electrodes or other implanted parts of a system according to any of the aspects of the present disclosure may be a safety concern, as it may cause tissue damage. For example, it has been reported that DC levels as low as 2-3 µA may cause pathological changes in nerve tissue. It is therefore desirable to limit leakage current (DC) to 1µA or less, such a 0.1µA or less. This may be achieved bymeans of a capacitor, also referred to as a DC blocking capacitor, which may be arranged in any of the current pathways. Specifically, the capacitor may be connected in series with two or more electrodes of the implant, such as the ones employed to apply a stimulation signal or a measuring signal. Furthermore, the capacitor may be connected in series with a part of the implant (such as an electrode, an energy source, or a housing) and the body of the patient, thereby reducing any current that might flow between the implant and tissue of the patient. A further advantage of the capacitor relates to prevention of charge accumulation on the electrodes. By coupling a capacitor to the electrodes, the capacitor may help dissipating accumulated charge from the electrodes, thereby allowing them to ‘slide back’ to their operating potential range. The capacitor may be implemented in the circuitry of the medical device, such as the stimulation device 40 discussed above. The capacitor may hence be provided as a component on any of the PCBs 260 or provided separate from the PCB 260. The sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS) form part of the autonomous nervous system (ANS) of the body. The SNS and the PNS control involuntary bodily functions such as, for example, heart rate, blood pressure,digestion, breathing rate, pupil size, blood flow to the muscles, and sexual responses. The SNS is commonly described as the “fight or flight” system, preparing the body for stress or danger, whereas the PNS is commonly referred to as the “rest and digest” system, promoting relaxation, energy storage, and other non-emergency functions. Activation of the SNS may result in increased heart rate, dilated airways, inhibited digestion, dilated pupils, and redirection of blood to muscles. Activation of the PNS may result in decreased heart rate, stimulated digestion, contracted pupils, and relaxation of muscles. For the SNS, the preganglionic neurons generally originate in the thoracic and lumbar regions of the spinal cord, whereas for the PNS the preganglionic neurons generally originate in the brainstem and the sacral region of the spinal cord. The SNS and the PNS may have complementary functions on the same effector tissue, such as an organ or a muscle. For example,the SNS may accelerate the heart rate, while the PNS may slow it down. Both the SNS and the PNS are typically active to some extent all the time, but their relative activities may change depending on the situation. This dynamic balance between the SNS and the PNS is commonly referred to as the “autonomic tone”. The autonomic tone hence implies there is an ongoing, background level of activity in the SNS and PNS. The body may adjust this balance as needed, ramping up sympathetic or parasympathetic activity in response to specific situations. Thetone may also capture the systems’ readiness to respond to stimuli. A certain “tone” or baseline activity level may ensure that the system can quickly ramp up or down its activity to adapt to different situations. Therefore, it may be of interest to adjust or affect this tone for therapeutic purposes, for example to affect the general level of stress in the body. Adjusting the level of activity in the SNS and/or the PNS may, for example, be employed to treat a variety of conditions. For example, increasing the PNS activity and/or decreasing the SNS activity could help treat conditions such as anxiety, hypertension, and irritable bowel syndrome (IBS). On the other hand, increasing SNS activity and/or decreasing PNS activity could help treat conditions suchas depression, chronic fatigue syndrome, and postural orthostatic tachycardia syndrome (PoTS). In some instances, both systems work together to perform a function. For example, during sexual arousal and ejaculation, bothsystems are involved in different phases. During sexual arousal, the PNS may cause the arteries in the erectile tissue to dilate to increasethe blood flow, whereas the SNS may cause the veins to contract to reduce the blood flow leaving the erectile tissue. The SNS and the PNSare also coopering during urination, wherein the PNS may cause the sphincters to relax and the SNS the bladder to contract. Adjusting or controlling the cooperation between the SNS and PNS may thus be employed to treat impotence and incontinence. The SNS and the PSNS may generally be considered to work together in a dynamic balance betweenarousal/activation/contraction and relaxation/inhibition/relaxation in the effector tissue innervated by the SNS and the PNS. Hence, the sympathetic activity and the parasympathetic activity may affect the response in the effector tissue, which typically may be a somatic effector tissue or an autonomic effector tissue. Examples of somatic effector tissue include muscular tissue, such as skeletal muscles, whereas examples of autonomic effector tissue include smooth muscle tissue, cardiac muscle tissue, and glandular or epithelial tissue (commonly involved in the production and secretion of various substances such as hormones, enzymes, and sweat). By stimulating a sympathetic nerve and/or a parasympathetic nerve innervating the effector tissue, the effector response may be controlled or affected accordingly. In case of muscular tissue, the effector response may be a contraction or relaxation of the tissue. In case the effector tissue being glandular tissue, the effector response may be an increased or reduced production or secretion of, for example, a hormone or an enzyme. In some examples, the stimulation of the sympathetic nerve and/or parasympathetic nerve may be employed to adjust the autonomic tone discussed above. Generally, ‘effector tissue’ refers to tissues in the body that produce a response or perform work (‘effector response’) when activated by nerve signals. Effectors may essentially be understood as the ‘end targets’ in the signalling pathways of the nervous system. As mentioned above, they may be categorized as muscles (skeletal muscles, smooth muscle) and glands (endocrine glands and exocrine glands). They may furthermore be categorized based on their relationship with the nervous system. The somatic effectors are mostlyskeletal muscles controlled by the somatic nervous system, responsible for voluntary actions, whereas the autonomic effectors typically are controlled by the autonomic nervous system and include smooth muscle tissue, cardiac muscle, and glands. These effectors are generally not under voluntary control. It is to be noted that the various aspects of stimulation discussed in the present disclosure may be applied to any type of effector tissue, including somatic effectors as well as autonomic effectors. An exemplary system for affecting an effector response in a patient will now be discussed with reference to figures 22’ andfigures 22b–e. This exampary system may be used in its own right, or combined with a system for Figure 22’ is a schematic illustration of a particular example of the system and its interaction with the body of the patient P, and more particularly with an effector tissue 230 innervated by a sympathetic nerve 231 and a parasympathetic nerve 232. As indicated in the figure, the sympathetic nerve 231 and the parasympathetic nerve 232 may extend between the effector tissue 230 and the central nervous system (CNS) 233. The sympathetic nerve 231 may, for example, originate from the thoracic or lumbar regions of the spinal cord, whereas the parasympathetic nerve may originate in the brainstem or the sacral region of the spinal cord. In the present example, the origin of the illustrated nerves 231, 232 is represented by item 233. It will be appreciated that the effector tissue 230 and the CNS 233 are merely schematically indicated in the present figure and that the technology described in the following may be applied to various types of nerves and effector tissues, located in various positions and parts of the body P. In some examples, the sympathetic nerve 231 and the parasympathetic nerve 232 may innervate the same effector tissue 230, which thus may be considered to have a dual ANS innervation. This means that the effector tissue 230 may receive competing inputs from the sympathetic and the parasympathetic divisions of the ANS. In other examples, the sympathetic nerve 231 may innervate a first effector tissue and the parasympathetic nerve 232 innervate a second effector tissue, the second effector tissue being different from the first effector tissue 230. In other words, the sympathetic nerve 231 and the parasympathetic nerve 232 may innervate different organs, muscles, or part of a muscle. Both these examples, i.e., in which the sympathetic and parasympathetic nerves 231, 232 innervate the same or different tissue, are represented by item 230 in the present figure. As illustrated, the system comprises a stimulation device 40 configured to deliver, directly or indirectly, a first simulation signal to the sympathetic nerve 231 innervating the first effector tissue 230 and a second stimulation signal to the parasympathetic nerve 232 innervating the second effector tissue 230. The effector tissue 230 may hence be the same effector tissue, forming part of the same muscle or organ, or different effector tissues 230 forming part of different muscles or organs. The system further comprises a control unit, or controller 240, configured to control an operation of the stimulation device 40 such that the first stimulation signal stimulates an activity of the sympathetic nerve 231 and the second stimulation signal inhibits an activity of the parasympathetic nerve 232, or such thatthe first stimulation signal inhibits an activity of the sympathetic nerve 231 and the second stimulation signal stimulates an activity of the parasympathetic nerve 232. Hence, the each of the first and second stimulation signals may result either in an activation or an inhibition,depending on the characteristics of the stimulation signal. A signal that results in an activation of the nerve (and/or the effector tissue) may be referred to as an activation signal, whereas a signal that results in an inhibition of the nerve (and/or the effector tissue) may be referred to as an inhibition signal. By activation is generally understood the generation of a nerve signal, i.e., action potentials travelling inthe nerve, whereas by inhibition is generally understood blocking or hindering any nerve signals from propagating through the nerve. Inhibition may also be referred to as a suppression or blocking of the nerve and/or its signals. It should be noted that the blocking may notalways be complete; on the contrary, there may still be some activity in the nerve. However, it is preferable to suppress the nerve signal to a degree that results in no or a negligible response in the effector tissue 230. The nervous response, or effector response, may typically be determined by, inter alia, a frequency content of the signal. The signal may be a periodic signal, including at least one of: a variable frequency component, a variable duty cycle component, a variable amplitude component, and a variable pause component. Generally, a low-frequency stimulation may be more likely to result in inhibition, while high-frequency stimulation tends to excite neural pathways and effector tissue. Further, higher voltages and currents may more often lead to activation compared to lower voltages and currents. The response to a stimulation signal may however vary based on other factors like location and target tissue. It may therefore be beneficial to measure the effect of the stimulation to determine whether the treatment has an intended effect or not and to provide feedback that can be used to adjust the characteristics of the stimulation signal. For example, the measured effect may be used as feedback in a closed loop control of the stimulation device 40. This will be discussed in further detail later in the present disclosure. The activation signal and the inhibition signal may cooperate to achieve a certain response. For example, the activation and inhibition signals may be applied to an antagonistic muscle pair, where the activation signal may be applied to the agonist to cause it tocontract and the inhibition signal is applied to the antagonist muscle to cause it to relax. Hence, this is an example of the effector tissue 230 forming part of different organs, such as the agonist and the antagonist of an antagonistic muscle pair. In other examples, the activation and inhibition signals may be applied in sequence to the same effector tissue 230, such that an activation (such as a contraction) triggered by the activation signal is followed by an inhibition (such as a relaxation) triggered by the inhibition signal, or vice versa. It may also be possible to apply several stimulation signals and/or inhibition signals to several different effector tissues. A first stimulation signal may, for example, be applied to a first effector tissue (such as a first muscle of an antagonistic pair) and a second stimulation signal be applied to a second effector tissue (such as the other muscle of the antagonistic pair). By applying the first and second stimulation signals in sequence, an improved control and stabilization of body movement may be achieved. The present system can be employed to treat or at least reduce or alleviate muscle spasms, which may be understood as sudden, involuntary contractions of one or more muscles. By applying an inhibition signal to the nerve innervating the muscle that is contracting during the spasm, or by applying the inhibition signal directly to that muscle, it may be caused to relax. Alternatively, or additionally, the activation signal may be applied to a nerve innervating a muscle counteracting the spasming muscle. As the counteracting muscle responds to the activation signal by contracting, it may help balancing or counteracting the spasming muscle. This approach may be particularly useful for addressing symptoms of, for example, a herniated disc, sciatica, spinal stenosis, as well as neurological disorders such as multiple sclerosis, Parkinson’s disease, dystonia, and cerebral palsy. A stimulation signal may have different characteristics depending on the desired effector response to be achieved. As already mentioned, these characteristics may relate to amplitude, frequency, waveform, polarity, and duty cycle. The duty cycle may be understood as the ratio of the time that the signal is ‘on’, i.e., active, to the total time of one cycle (period). For a pulsed signal, this would correspond to the ratio of the pulse length to the length a cycle. The duty cycle is usually expressed as a percentage or a fraction. For example, a 50% duty cycle may be understood as the signal being ‘on’ for half of the cycle and ‘off’ for the other half. The duty cycle of an electric stimulation signal can influence the energy delivered to the tissue (or at least the energy to which the tissue is exposed). A higher duty cycle means that the tissue may be exposed to more electric charges and energy, which can increase the stimulation effect, whereas a lower duty cycle means that the tissue may be exposed to less electric charge and energy. A lower duty cycle may mean that the tissue has more time to recover and adapt to the stimulation, which can reduce the risk of tissue damage or fatigue. Different types of tissues may require different duty cycles for optimal stimulation. Electric stimulation signals with low duty cycles (less than 10%) have been shown to promote cell regeneration, proliferation, and growth, whereas electric signals with high duty cycles (more than 50%) have been shown to inhibit cell growth. Generally, duty cycles above 10% may result in a stronger and faster contraction of muscle cells, while duty cycles below 10% may result in a weaker and slower contraction of muscle cells. Accordingly, the pause component of a stimulation signal, describing the time interval between two consecutive pulses or two consecutive pulse trains, can affect the stimulation of tissue in several ways. Increasing the pause component may facilitate recovery from the previous stimulation and reduce the risk of overstimulation or fatigue. A longer pause component can reduce the risk of tissue damage or adaptation, while a shorter pause component can increase the stimulation effect. Furthermore, the pause component may influence the net charge delivered to the tissue and the electrochemical reactions at the electrode–tissue interface. A longer pause component can allow the charge to dissipate and the pH to normalize, while a shorter pause component can cause charge accumulation and pH changes. The pause component may in some examples range from 0.1-10 seconds, such as 0.5-2 seconds, depending on the tissue type. In an example, a nerve, such as the sympathetic nerve 231 or the parasympathetic nerve 232 may be activated or stimulated byan activation signal comprising a frequency in the range of 0.1-100 Hz, such as 1-50 Hz. Such a signal may be referred to as a low-frequency signal. The activation signal may comprise a voltage in the range of 1-15 V, such as about 10V and a current in the range of 1-50 mA, such as 2-4 mA, depending on the target tissue. Applying such a signal to a sympathetic nerve 231 may typically result in an activation of the effector tissue 230, such as a contraction of muscle tissue or an increased secretion of a gland, whereas applying the signal to a parasympathetic nerve 232 may typically result in an inactivation of the effector tissue 230. An inactivation may typically include relaxation of a muscle or a reduced secretion of a gland. Applying such a signal directly to the effector tissue 230 may result in a similar response as applying it to the nerve. To inhibit or inactivate the nerve, an inhibition signal comprising a frequency in the range of 1-10 kHz, such a 2-5 kHz, can be used. Similar to the activation signal, the voltage can be in the range of 1-15 V and the current in the range of 1-50 mA. Applying such as signal to a nerve 231, 232 may result in the nerve signals being blocked or at least heavily reduced. As an effect, the effector tissue 230 can be considered more or less cut off from the signals delivered by that nerve from the CNS 233. The control unit 240 may be configured to control the operation of the stimulation device 40 to provide a low-frequency signal for stimulating the activity of the sympathetic nerve 231 and a high-frequency signal for inhibiting the activity of the parasympathetic nerve 232. This may shift the balance between the SNS and PNS activity towards the SNS activity, which may result in a muscle contraction (in case of the effector tissue being a muscle tissue) or increased secretion of a gland (in case of the effector tissue being a glandular tissue). The control unit 240 may as well be configured to control the operation of the stimulation device 40 to provide a high-frequency signal for inhibiting the activity of the sympathetic nerve 231 and a low-frequency signal for stimulating the activity of the parasympathetic nerve 232.This may shift the balance between the SNS and PNS activity towards the PNS activity, which may result in a muscle relaxation (in case of the effector tissue being a muscle tissue) or reduced secretion of a gland (in case of the effector tissue being a glandular tissue). Theactivation signal and the inhibition signal may be applied to the respective nerves 231, 232 concurrently, simultaneously, or separately, i.e., one at a time. The stimulation device 40 may comprise circuitry and a power source for generating the stimulation signals, which, for example, may be electrical signals or mechanical vibration signals. The circuitry and, optionally, the power source may be arranged within a housingwhich may be implantable in the body of the patient. Electrical leads may be provided to connect the circuitry to a signal generating means 210, 220 arranged at the respective nerves 231, 232. In case of an electric stimulation signal, the signal generating means 210, 220 maycomprise a respective electrode arrangement. In case of a mechanical vibration signal the signal generating means 210, 220 may comprise a respective vibrator, such as a piezoelectric vibrator comprising one or more piezoelectric elements. The vibrations may be generated by the direct movement of the piezoelectric element, or by other mechanical elements actuated by the piezoelectric element. In an example, the vibrations may be generated by an eccentric weight that are brought to rotate by a piezoelectric actuator, such as a rotational motor. At least parts of the stimulation device 40, such as a housing and/or energy source, may be implanted in fat tissue of the patient, be anchored to bone tissue, or implanted subcutaneously. The control unit 240 may be integrated with the stimulation device 40, such as arranged within the same housing as the electric circuitry, or the energy source mentioned above. In other examples, the control unit 240 may be arranged separately or remotely, i.e., at adifferent physical location than the stimulation device 40. In the latter case, the control unit 240 may be communicatively coupled to the stimulation device 40 by means of a wired or wireless connection. The control unit 240 may hence be arranged within the patient’s body or externally, i.e., outside the body of the patient P. The signal generating means may comprise a first electrode arrangement 210 configured to be coupled to the sympathetic nerve 231 to deliver the first stimulation signal (such as an activation signal or an inhibition signal) and a second electrode arrangement 220 configured to be coupled to the parasympathetic nerve 220 to deliver the second stimulation signal (such as an inhibition signal or anactivation signal). Figures 22b-e discussed above show examples of electrode arrangements which may be implemented in any of the stimulation devices 40 discussed in the present disclosure. It will be appreciated that the above-described concept of activating/inhibiting the sympathetic/parasympathetic nerves 231, 232 may be employed to treat a variety of symptoms, depending on where in the body the stimulation device 40 and the electrode arrangements 210, 220 are implanted and which effector tissue is innervated by the respective nerves 231, 232. In some examples, the nerves 231, 232 innervate smooth muscle tissue of the renal artery. This may allow the stimulation device 40 to deliver stimulation signals inducing at least one of vasodilation and vasoconstriction in the renal artery, thereby affecting a blood pressure of the patient. In some examples, the first effector tissue forms part of an artery supplying erectile genital tissue with blood and the second effector tissue forms part of a vein draining the blood from the genital erectile tissue. This may allow the stimulation device to deliver stimulation signals for triggering or causing vasodilation in the artery and vasoconstriction in the vein, thereby inducing erection in the erectile genitalia. In some examples, the effector tissue 230 is smooth muscle tissue of a gastrointestinal tract of the patient. This allows the stimulation device to deliver stimulation signals affecting a level of motility of the gastrointestinal tract, thereby affecting at least one of nutrition uptake and fecal texture. In some examples, the effector tissue 230 is a glandular tissue, which allows the stimulation device 40 to deliver stimulation signals affecting a level of glandular secretion of the glandular tissue 230. The stimulation device 40 may hence be designed to stimulate various types of effector tissues in various parts of the body, depending on what type of response is desired and what type of symptom is treated. As various types of tissue (as well as individuals) mayrequire various stimulation parameters, it may be beneficial to employ a calibration routine, in which the response to the applied stimulation signal is measured and used as feedback when controlling the stimulation parameters. However, some general observations may be made, which may serve as a starting point when choosing the stimulation parameters. For example, each type of tissue may be associated with a specific frequency range with may be used to trigger a response in the tissue. Muscle tissue is generally formed of muscle cells that are joined together in tissue that can be either striated or smooth. Striated muscle tissue is further classified as either skeletal or cardiac muscle tissue. Skeletal muscle tissue is typically subject to conscious control, whereas cardiac muscle tissue is typically found in the heart and not subject to voluntary control. The so-called smooth muscle tissue is a third type of tissue, which is typically neither striated in structure nor under voluntary control. The contraction of the muscle tissue may be activated through electrochemical nerve impulses, i.e., action potentials. The action potentials may result in the release of neurotransmitters, causing the muscle cell to contract. Smooth muscle cells may typically be activated, i.e., caused to contract, using a frequency in the range of 0.01-150 Hz. More specifically, the frequency may be in the ranges of 0.1-1 Hz, 1-10 Hz, 10-50 Hz and 50-150 Hz. It has been observed that a relatively low frequency component, such as pulse frequency, of about 1 Hz or less may be employed to imitate or enhance the slow wave potential associated with, e.g., pacemaker cells of the smooth muscle tissue. Furthermore, the pulse duration may be in the range of 0.01-100 ms, such as 0.1-4 mm, and preferably such as 1-5 ms. In case of an electric stimulation signal, the amplitude may be in the range of 0.1-15 mA, such as 0.5-5 mA. Skeletal muscle cells may typically be activated by means of a stimulation signal having a frequency of about 0.1-100 Hz, such as 1-10 Hz or 10-100 Hz. In an example, a frequency of about 50 Hz may be used. Furthermore, a pulse duration of 0.01-100 ms, such as 0.1-4 mm, and preferably such as 1-5 ms, may be employed. In case of an electric stimulation signal, the current amplitude may be 0.1-15 mA. In some examples, a desired muscle contraction response has been experimentally observed within a range of 0.5 to 5.0 mA. Cardiac muscle cells may typically be activated by slightly lower frequencies compared to skeletal muscle cells, such as 0.5-3 Hz. In an example, a beneficial response has been observed when applying a stimulation signal having a frequency of about 1 Hz. Similar to the skeletal muscles, the pulse duration may be 0.01-100 ms, such as 0.1-4 mm, and preferably such as 1-5 ms. In case of an electric stimulation signal, the current amplitude may be 0.1-15, such as 0.5 to 5.0 mA. Consequently, it will be appreciated that the stimulation parameters, such as frequency and amplitude may be adapted to the muscle type and the type of response desired. This applies both to electric stimulation and vibrational stimulation signal. It may be beneficial to apply the stimulation with a preferred activation direction, such that a majority of the action potentials generated in response to the stimulation propagate in the preferred activation direction. This may be achieved by inhibiting or blocking the nerve at a specific location, such that no or at least only a minor part of the action potentials can travel beyond that location. For some applications, the preferred activation direction would be in the efferent direction, i.e., towards the effector tissue 230. Put differently, itwould in some examples be beneficial if the application of the stimulation signal gives rise to action potentials propagating in the direction of the tissue in which the effector response is desired, rather than in the opposite, afferent direction (typically towards the CNS 233) to reduce adverse side effects of the application of the signal. Examples of adverse side effects include initiation of undesired or counterproductive feedback to the brain and can result in undesired sensations or activity of the patient. In some examples, it may be of interest to prevent action potentials from travelling in the efferent direction, i.e., away from the CNS 233 and towards the effector tissue 230. The generation of action potentials propagating in a preferred direction may be achieved by means of so-called unidirectional stimulation techniques, which will be described in the following with reference to the examples shown in figures 22’a-f. The underlying rationale is based on the application of a suppression signal for suppressing action potentials propagating in the nerve in an undesired direction, typically the afferent direction (also referred to as antidromic direction). The suppression signal may comprise a frequency component for blocking, inhibiting, or suppressing the nerve’s conduction capacity in a similar manner as discussed above with reference to the inhibition signal. As mentioned above, such a frequency component may be relatively high, typically in the range of 1-10 kHz. The suppression signal, which also may be referred to as an inhibition signal, may be an electric signal or a mechanical (vibrational) signal. Combinations of the two are also possible, in which a combination of an electric signal and a vibrational signal is provided. The combined signal may, for example, be generated by a vibrational element, such as a piezoelectric element, comprising one or more electrodes 210, 220 for applying an electric signal. Vice versa, the combined signal may as well be generated by an electrode arrangement 210, 220 comprising a piezoelectric element for imparting vibrations into the nerve. A frequency of the inhibition signal may thus be selected to block or at least reduce the nerve’s ability to convey nerve signals. Therefore, the suppression signal may comprise one or more frequency components in the kilohertz range. Figure 22’a is a schematic illustration of a system for affecting an effector response in effector tissue 230 of a patient according to some examples. The system comprises a stimulation device 40 comprising a first electrode arrangement 210 for applying a stimulationsignal to a nerve 231 innervating the effector tissue 230. The nerve may be a branch of the autonomous nervous system, such as sympathetic nerve or a parasympathetic nerve as discussed above in connection with the combined SNS and PNS stimulation. Thestimulation device 40 further comprises a second electrode arrangement 220 for delivering a suppression signal to the nerve 231 (the suppression signal may also be referred to as an inhibition signal). The second electrode arrangement 220 may be coupled to the nerve 231 at a position allowing afferent nerve signals, travelling towards the CNS 233, to be blocked or at least hindered. As indicated in the present figure, the first electrode arrangement 210 and the second electrode arrangement 220 may be arranged spaced apart along a conduction direction of the nerve 231. The second electrode arrangement 220 may be coupled to the nerve 231 at a position between the first electrode arrangement 210 and the CNS 233. It will however be appreciated that the second electrode arrangement 220 in other examples may be coupled to the nerve 231 at a position between the first electrode arrangement 210 and the effector tissue 230 to suppress efferent nerve signals travelling towards the effector tissue 230. Afferent signals may refer to signals travelling towards the CNS 233. They typically originate from sensory receptors locatedthroughout the body and carry sensory information from the body to the brain. The term “afferent” may hence be used to denote a propagation direction generally towards the CNS 233. Accordingly, efferent signals may refer to signals travelling in the opposite direction, away from the CNS 233 and towards various effector organs, such as muscles and glands. The efferent signals typically carry instructions from the CNS 233 and the brain to the body. The term “efferent” may hence be used to denote a propagation direction generally away from the CNS 233. The direction in which an electrical impulse travels along a neuron’s axon may also be described by the terms “antidromic” and“orthodromic”, and may therefore be used to refer to the direction in which the action potentials, generated by the stimulation device 40, travel. Orthodromic conduction may be understood as referring to the propagation of nerve impulses in the natural, physiological direction.In a motor neuron, for example, this may be from the cell body (located in the spinal cord or brain) down the axon to the axon terminals that synapse with muscle fibers or other neurons (i.e., in the efferent direction). In a sensory neuron, it may be from the sensory endings towards the cell body and then onto the spinal cord or brain (i.e., in the afferent direction). Correspondingly, antidromic conduction may be understood as the direction of propagation of nerve impulses in the opposite direction to the normal or natural flow. For a motor neuron, this may mean an impulse travelling from the axon terminals back towards the cell body (i.e., in the afferent direction). In a sensory neuron, it may be from the CNS 233 out towards the sensory endings (i.e., in the efferent direction). It will be understood that the second electrode arrangement 220 may be employed to suppress nerve signals propagating in any of the above-mentioned directions, i.e., efferent, afferent, orthodromic, and antidromic direction, depending on the type of stimulation, the type of effector tissue, and what type of response is desired. The operation of the first electrode arrangement 210 and the second electrode arrangement 220, i.e., the generation andapplication of the stimulation signal and the suppression signal, respectively, may be controlled by a control unit 240 that is operablyconnected to the stimulation device 40. Further, the control unit may be configured to receive sensor input, such as from one or more sensors 250 arranged to generate a signal indicative of a response in the effector tissue 230 when stimulated by the stimulation signal. Thestimulation device 40 may hence be similarly configured as the stimulation device 40 discussed above with reference to figure 21. The control unit 240 may be configured to drive the stimulation device 40 such that each of the first and second electrode arrangements 210, 220 are actuated in sequence. In an example, a delay of the suppression signal may be timed to generally match a conduction velocity of the stimulation signal in the nerve 231. The blocking or suppressed conduction of the nerve 231 can therefore be provided substantially at the same time the action potentials, generated by the stimulation signal, reach the location where the suppressionsignal is applied to the nerve 231. In some examples, the control unit 240 may be configured to drive the stimulation device 40 such that each of the first and second electrode arrangements 210, 220 are apply the stimulation signal and the suppression signal substantially at the same time, such as concurrently (i.e., at least partly overlapping in time) or simultaneously. As mentioned above in connection with the stimulation of the SNS and PNS, the stimulation signal may be a low-frequency signal with a frequency in the range of, for example, 0.1-100 Hz and the suppression signal a high-frequency signal with a frequency in the range of, for example, 1-10 kHz. The first electrode arrangement 210 and/or the second electrode arrangement 220 may comprise a monopolar electrode delivering the stimulation signal and/or the suppression signal to the nerve 231. The monopolar electrode may be operated as an anode or a cathode, with a separate electrode forming a complementing cathode or anode for closing the electric circuit. This complementing electrode, closing the electric circuit, may be provided elsewhere, such as by a housing of the stimulation device 40 or be arranged at another location in or on the patient’s body. In some examples, the first electrode arrangement 210 and/or the second electrode arrangement 220 may comprise a bipolar electrode, comprising a first electrode serving as a cathode and a second electrode serving as an anode for closing the electric circuit. Afew examples will be discussed in the following with reference to the accompanying figures. Figure 22’b illustrates first electrode arrangement 210 and a second electrode arrangement 220 of a stimulation device 40 according to some examples. The first electrode arrangement 210 comprises a first stimulation electrode 211 and a second stimulation electrode 212 for applying the stimulation signal to the nerve 231 (or, in some examples, directly to the effector tissue 230). The firststimulation electrode 211 and the second stimulation electrode 212 may be arranged spaced apart along the nerve, such that the applied stimulation signal may propagate between the first and second stimulation electrodes 211, 212 in a conduction direction of the nerve 231. The first stimulation electrode 211 may hence serve as a cathode whereas the second stimulation electrode 212 may serve as an anode. Electrical leads, or conduction lines, may be coupled to each of the electrodes 211, 212 for supplying the respective electrode 211, 212 with electric power. The first electrode arrangement 210 may further comprise a cuff 215 configured to be at least partly arranged around the nerve 231 and to hold the first electrode 211 and the second electrode 212 in place against the nerve 231. Similar to the first electrode arrangement 210, the second electrode arrangement 220 may, in some examples, comprise a firstsuppression electrode 221 and a second suppression electrode 222 for applying the suppression signal to the nerve 231 (or, in some examples, directly to the effector tissue 230). The first suppression electrode 221 and the second suppression electrode 222 may be arranged spaced apart along the nerve 231. The first suppression electrode 221 may hence serve as a cathode, while the second suppression electrode 222 may serve as an anode during operation. Electrical leads, or conduction lines, may be coupled to each of theelectrodes 221, 222 for supplying the respective electrode 221, 222 with electric power. The second electrode arrangement 220 may further comprise a cuff 225 configured to be at least partly arranged around the nerve 231 and to hold the first suppression electrode 221 and the second suppression electrode 222 in place against the nerve 231. In other examples, the electrodes 211, 212, 221, 222 may be replaced with vibration elements, such as piezoelectric elements, for providing a mechanical (vibrational) signal to the nerve 231. It will be appreciated that further electrodes may be provided to deliver the stimulation signal and the suppression signal, respectively. An example of such a configuration is shown in figure 22’c, illustrating a cuff electrode arrangement 210, 220 which can be used to deliver the stimulation signal and/or the suppression signal. Each cuff electrode 210 shown in the present example include a first electrode 211, a second electrode 212, and a third electrode 213. Each of the electrodes 211, 212, 213 may comprise an electrically conductive surface configured to be arranged to abut or rest against the tissue to which the electrical signal is to be delivered. The electrodes 211, 212, 213 may be individually controlled electrically. At least a first one of the electrodes 211, 212, 213 may be operated as a cathode, wherein at least a second one of the electrodes 211, 212, 213 may be operated as an anode for delivering the stimulation signal or the suppression signal to the nerve 231. In this arrangement, the electrode arrangements 210 may comprise a lead 216 for providing the electric power required for the stimulation signal / suppression signal. The lead may be oriented across the nerve 231 or along the nerve 231, depending on the implantation site and the available space at the nerve 231. The cuff electrode 210 may comprise a body 215 which may be molded from an elastomeric material (e.g., silicone). The electrodes 211, 212, 213 may be integrated with the body 215 during the molding process. The body 215 may be shaped or formed to normally assume a curled or tubular spiral or rolled configuration. As shown in the present figures, the body 215 may in its normal, coiled conditionhave overlapping end portions, forming a spiral extending more than 360° end to end. The body 215 may be elastically uncoiled to increase its inner diameter and allow the cuff electrode 210 to be initially fitted about a periphery of a target nerve 231. Further, the coiled shape of the body 215 allows for the inner diameter of the cuff electrode 215 to be further adjusted to post-operative changes that might occur for example due to swelling. The elasticity of the body 215 may beneficially wrap the electrodes 211, 212, 213 snugly against the periphery of the nerve 231. Figures 22’d and e show examples of an electrically conductive surface, or electrode 211 of an electrode arrangement 210, 220 asmentioned above. The electrode 211 may be formed by a single, continuous conductive surface as in figure 22’d or a surface that is segmented into separate conductive segments that may be electrically coupled by a wire or conductive lead as in figure 22’e. A lead 217 may be provided to power the electrode 211. Figure 22’f show an example wherein the cuff electrode 210 is wrapped around the target nerve 231 such that the electrically conductive surfaces, forming the stimulation electrode(s) or the suppression electrode(s), make and sustain circumferential contact substantially about the entire periphery of the target nerve 231. It will however be appreciated that in some examples, the electrode(s) may be positioned to make contact with the target nerve 231 along the length axis of the nerve 231, i.e., the propagation direction of the nerve 231. The conductive surfaces, forming the stimulation/suppression electrodes, may be made from strips of a metal, such as platinum. In some examples, they may be formed from a thin film of a metal, which may be deposited on a surface of the body 215 forming the cuff of the electrode arrangement 210, 220. In an example, each of the conductive surfaces (or strips) may measure about 10 mm in length and 2 mm in width. It will be appreciated that in further examples, not illustrated in the present figures, one or more of the electrode arrangements 210, 220 may have a configuration different from the cuff electrode design. The electrode arrangements 210, 220 may, for example, be configured to be placed against the nerve 231 without encircling or enclosing it. The electrode arrangements 210, 220 may be configured as needle electrodes arranged to protrude into the nerve 231 or lie against an outer surface of the nerve 231. In further examples, the electrode arrangements 210, 220 may be patch electrodes similar to the ones illustrated in figures 22b and c. The effector response may be measured by a sensor device, such as the sensor device 250 shown in the example of figure 22’ and 22’a. The use and operation of such a sensor device 250 will be described in the following with reference to figures 22’’ and Figures 22b-d. Figure 22’’ is a schematic illustration of a stimulation device 40 configured to deliver a stimulation signal to a nerve 231 innervating an effector tissue 230 of a patient. The stimulation device 40 may form part of a system comprising a sensor device 250 configured to generate a sensor signal indicating the effector response in the effector tissue 230, as well as a control unit, or controller 240, operable to receive the sensor signal and to control an operation of the stimulation device 40 based at least in part on the sensor signal. The nerve 231 may be a sympathetic nerve or a parasympathetic nerve extending between the central nervous system 233 and theeffector tissue 230, as previously discussed in connection with figures 22’ and 22’’. Consequently, the stimulation signal may be an activation signal, such as the previously discussed low-frequency signal, or an inhibition signal, such as the previously discussed high- frequency signal. For illustrative purposes, the stimulation signal is in the present figure applied by means of an electrode arrangement 210 arranged to touch the nerve 231. The exemplary electrode arrangement 210 may be a unipolar electrode, comprising a first stimulationelectrode 211 that may act as a cathode or anode. Another electrode (not shown) may be provided elsewhere to close the electric circuit. This circuit-closing electrode may, for example, be formed by a portion of a housing of the stimulation device 40. It will however be appreciated that other configurations of the stimulation device 40 and the electrode arrangement(s) 210 are possible. The sensor device 250 may be configured to measure the effector response in various ways. The sensor device 250 may be configured to employ one or more electrodes for measuring an electrical characteristic of the effector tissue 230. In further examples, the sensor device 250 may be configured to employ one or more mechanical sensor elements for measuring a mechanical characteristic or response in the effector tissue 230. The information provided by the sensor device 250 may thus be used to determine or monitor an activity or response in the effector tissue 230 and provide feedback that can be used for controlling the operation of the stimulation device 40. Figure 22b previously discussed can alternatively be described as follows. Figure 22b shows an example in which the sensordevice 250 comprises one or more sensor electrodes 251, 252 configured to measure an electric activity in the effector tissue 230 in response to the mechanical or electrical stimulation signal. This approach may be referred to as electromyography, EMG. The electrode(s) may be arranged to measure the electric activity in the effector tissue 230 (typically muscle tissue). An increased activity in the effector tissue 230 may typically cause an increased electrical activity, whereas the effector tissue 230 normally does not produce any electrical activity during rest. Therefore, EMG may be used to detect and quantify changes in the electrical activity of the effector tissue 230 caused by an applied stimulation signal. In the present example, a first sensor electrode 251 and a second sensor electrode 252 are provided to generate the sensor signal. The voltage signal, indicating the response in the effector tissue 230, may typically be in the range of 1-2 mV. Figure 22c previously discussed can alternatively be described as follows. Figure 22c shows an example in which the sensor device 250 comprises one or more sensor electrodes 251, 252, 253, 254 configured to measure a change in electrical impedance in the effector tissue in response to the stimulation signal. This approach may be referred to as electrical impedance myography, EIM. The electrodes may be arranged to apply an electric signal I, typically in the kHz to MHz frequency range, to the tissue 230 and measure the resulting voltages. The sensor device 250 may, in some examples, comprise a first electrode 251 and a second electrode 252 for applying the electric signal I and a third electrode 253 and a fourth electrode 254 for measuring the resulting voltage V. This information may be used to determine the impedance, which may be separated into a resistance and reactance. For a given resistance and reactance, a phase may be calculated. It has been found that all three parameters, i.e., resistance, reactance, and phase, may be indicative of the effector response caused by the stimulation signal delivered by the stimulation device 40. The impedance of the effector tissue 230 may, for example, be measured during the stimulation and when no stimulation signal is applied. Differences in impedance when the tissue 230 is stimulated and when not stimulated may be used to analyze the effects of the stimulation and to control the operation of the stimulation device 40 accordingly. In the present examples, the electrodes are arranged spaced apart on a surface of the effector tissue 230, with the third and fourth electrodes 253, 254 arranged between the first and second electrodes 251, 252. In some examples, a typical impedanceover a muscle is about 1kΩ and the measured changes in response to the stimulation are in the order of 1Ω. Thus, by measuring impedance variations of about 0.1%, information may be retrieved about the muscle’s response to the applied stimulation signal. Combinations of the EMG and EIM approaches are possible. Thus, in some examples, the sensor device 250 comprises an electromyographic sensor configured to measure an electric activity in the effector tissue 230 and an electric impedance sensor configured to measure a change in electrical impedance in the effector tissue. The control unit 240 may be configured to receive sensor signals from both the electromyographic sensor and the impedance sensor and control or adjust the application of the stimulation signalbased on the received sensor signals. The combination of EMG and EIM may be beneficial because it may enhance the reliability of muscle contraction detection. In this example, EMG may provide detailed information on muscle activity, while EIM may offer insights into muscle composition and health. When used together, they may compensate for each other’s limitations, improving the accuracy and robustness ofeffector response monitoring. This synergy may be particularly advantageous in environments with potential for mechanical disturbances to the electrodes, ensuring more consistent and reliable effector response readings. The sensor electrode 251-254 of the sensor device 250 may be configured to be arranged at the effector tissue 230 or inserted into the effector tissue 230. The sensor electrode(s) 251 may in some examples be formed as one or more patch electrodes that can be attached to the effector tissue 230. In some examples, the sensor electrode(s) 251 may be formed as needle electrodes arranged to protrude at least partially into the effector tissue 230. The sensor device 250 may further comprise a reference electrode, allowing the sensor signal to be based on an electrical interaction between one or more sensor electrode 251 and the reference electrode. The reference electrode may be formed by a housing of the stimulation device 40, and/or an electrode arranged at the effector tissue 230, spaced apart from the sensor electrode 211. As mentioned above, the sensor device 250 may in some examples comprise one or more mechanical sensor elements for measuring a mechanical characteristics or response. The sensor device 250 may, for example, be configured to measure mechanicalmovement in the effector tissue 230. Figure 22d previously discussed can alternatively be described as follows. Figure 22d shows an example of such a sensor device 250, which comprises a strain gauge for measuring a contraction or relaxation of effector tissue 230 in response to the stimulation signal. Thus, the effector tissue 230 may be muscle tissue, such as smooth tissue. The strain may be positive(due to elongation of the muscle tissue) or negative (compressive, due to contraction of the muscle tissue). The strain gauge may be arranged to convert a change in dimension to a change in electrical resistance. In the present example, the strain gauge comprises a wire or foil 256 arranged in a grid pattern. During operation, the electrical resistance of the strain gauge may change in proportion to the deformation (and thus strain) experienced by the wire or foil pattern 256. An excitation voltage may be applied to the strain gauge and a sense voltage measured as an output voltage. As the resistance changes due to induced strain, the output voltage also changes. The present example comprises a metallic foil pattern 256 arranged on a flexible support 255, such as a thin silicone film 255. The flexible support, or support patch 255, can be attached to an outer surface of the effector tissue 230 to be measured. Due to the flexible nature of the support 255, it may deform and contract as the effector tissue 230 deforms and contracts, thereby causing the metallic foil pattern 256 to deform accordingly. The output from the sensor device 250 may be retrieved by the control unit 240, which may be configured to determine a response measure based on the sensor signal. The response measure may be understood as a measure indicative of the effector response. Hence, the response measure may be a certain voltage, impedance, phase, resistance, or degree of contraction or relaxation, depending on the principle of operation used by the sensor device. In case of the sensor device 250 being an EMG sensor, the response measure may be a voltage, in case of an EIM sensor, the response measure may be an impedance and/or phase, and in case of the sensor being an mechanomyography (MMG) sensor, the response measure may be a resistance or degree of deformation. The control unit 240 may be operable to compare the response measure with a predetermined reference measure and to control the stimulation device based on the comparison to adjust or maintain a desired response in the effector tissue 230. The control unit 240 may, for example, increase an intensity of the stimulation signal in response to the response measure being below the reference measure and to reduce the intensity of the stimulation signal in response to the response measure exceeding the reference measure. The control unit 240 may thus operate as a closed-loop controller, or feedback controller, using information carried by the sensor signal as feedback when controlling the operation of the stimulation device 40 in a control loop. The control unit 240 may be configured to increase the intensity of the stimulation signal by increasing at least one of a frequency, current amplitude, and voltage amplitude of the stimulation signal. Further, the control unit 240 may be configured to reduce the intensity of the stimulation signal by reducing at least one of the frequency, current amplitude, and voltage amplitude of the stimulation signal. The predetermined reference measure may be based on a previous measurement of the effector response in the patient, and/or on previous measurements of effector responses in other patients. The control unit 240 may be configured to monitor the level of effector response over time, and to control the stimulation device based on a change rate in the effector response over time. Thus, the control unit 240 may be arranged to calculate a time derivative of the effector response and control the operation of the stimulation device 40 accordingly. It will be appreciated that the response measure in some examples may be used to determine a calibration parameter of the stimulation device 40. The determination of the calibration parameter may form part of a calibration process, which may be performed inconnection with implantation of the stimulation device 40. The calibration process may also be performed intermittently or on a regular basis, for example upon request by a healthcare professional. The calibration parameter may indicate an offset needed to adjust a characteristic of the stimulation signal, such as a voltage, frequency, or current, to achieve a desired level of effector response. The calibration process may hence be performed to ensure proper operation of the stimulation device 40 and increase the prospects of a desired and predictable effect of the applied stimulation signal. Denervation is a process of interrupting the nerve supply to a particular organ or area in the body. This can be done for various medical reasons, such as to relieve pain, reduce muscle spasticity, or address certain pathological conditions or illness symptoms. Denervation typically involves cutting off or disrupting the nerve signals to specific part of the body. This can be achieved through various methods, such as surgical removal, the use of chemicals, or by applying thermal or electrical energy to destroy nerve tissue. Surgical denervation may involve physically cutting or removing the nerve or part of it. It is often permanent and may be used in cases where other treatments have failed. Chemical denervation involves injecting a substance (like alcohol or phenol) that destroys or blocks the nerve fibers. This method may often be used for spastic muscles or for pain management. Radiofrequency (RF) ablation employs high-frequency electrical currents to heat up a small area of nerve tissue, thereby blocking further signaling through the nerve. Cryoablation is an example where cold is employed to freeze and destroy the nerve tissue. Denervation can be effective in providing a long term or even permanent effect on the treated tissue. However, it also comes with risks such as undesired side effects and denervation of the ‘wrong’ tissue. Incorrect placement of the ablation tool or administration of the nerve blocking or nerve destructing substance may lead to undesired damages and denervation of tissue not intended to be denervated. Figure 22’’’a shows a system comprising an inhibition device 40 configured to temporarily inhibit a nerve innervating the effector tissue. A sensor 250 may be employed to generate a sensor signal indicative of an effector response in the effector tissue innervated by the nerve, wherein the effector response is at least partly induced by the inhibiting of the nerve. The effector response may be used to determine that a desired effect is achieved by the inhibition of the nerve before the nerve is being denervated. The present system therefore makes it possible to verify that the correct nerve is identified before the denervation is performed. This may be verified bydetermining a response measure based on the sensor signal, the response measure being indicative of the effector response, to compare the response measure with a predetermined reference measure and determining that the desired effector response has been achieved. The inhibition device 40 may be a stimulation device 40 according to any of the above-discussed examples, comprising one ormore electrode arrangements 210, 220 for delivering an inhibition signal hindering action potentials from passing through the nerve. Figure 22’’’b shows an example of a probe 46 or catheter comprising a first electrode arrangement 210 and a second electrode arrangement 220. The probe 46 is configured to be inserted into the body and arranged such that the first and second electrode arrangements 210, 220 can be placed against the tissue that is to be ablated. In some examples, the probe 46 may be a combined inhibition and denervation device. In other words, the same probe 46 may be used both for temporarily inhibiting the nerve and for ablating it. This could be achieved byoperating the electrode arrangements 210, 220 in different modes – an inhibition mode for inhibiting the nerve, and a denervation mode for denervating the effector tissue. In the inhibition mode, the electrode arrangements 210, 220 may be operated to apply an inhibition signal as previously discussed, whereas they in the denervation mode may be operated to apply an ablation signal for blocking further signaling through the nerve. While the inhibition signal is a relatively weak/ low power signal intended to not cause any permanent damage to the tissue, the ablation signal may be relatively strong signal / high power signal. The inhibition signal may typically have a frequency in the range of 1-10kHz, a voltage of about 1-15V, and a current of about 1-50mA (corresponding to a power of less than 1W). The ablation signal, on the other hand, may comprise an alternating current in the range of 350-500kHz, a voltage ranging from 500 to 400 V and in some examples a power of 50 to 40W. This may be referred to as a type of radiofrequency ablation (RFA). The inhibition device 40 may in some examples comprise a cooling device configured to cool the nerve to cause a temporary inhibition of the nerve. The cooling device may be formed as a cooling element arranged on the probe 46, which hence may be referred to as a cryoprobe. The cryoprobe 46 may comprise form a lumen or channel guiding the cooling gas to the tip of the probe 46, which may be placed against the nerve to induce a temporary inhibition. Similar to the electrical probe above, the cryoprobe 46 may be a combined inhibition and ablation device. The difference between the two functions may be determined by the temperature of the probe, morespecifically to the degree of cooling of the tissue. A temporary inhibition may occur if the nerve is cooled to a temperature exceeding 0°C, whereas an ablation (or at least a long-term blocking) may be achieved by freezing the tissue (i.e., lowering the temperature below 0°C). This allows for the placement of the probe 46 to be verified before the ablation is commenced. In some examples, the inhibition device 40 is operable to deliver a substance to the nerve, such as a toxin temporarily inhibitingthe nerve. This may be achieved by means of a toxin administration device 42, of which a particular example is illustrated in figure 22’’’c. The toxin administration device 42 may comprise a catheter or lumen that can be inserted into the body of the patient and arranged to deliver the substance directly to the relevant nerve. A relatively mild substance may be used to ensure a temporary inhibition. Should a stronger substance be used, a permanent or at least long-term effect may be achieved, and the process may then be referred to as a neurotoxin- induced ablation. By varying the types or concentrations of the administered substance, the toxin administration device 42 may be used both for an initial, temporary inhibition and a more permanent or long-term ablation. Examples of toxins include neurotoxins such as botulinum toxin and tetanus toxin. It will be appreciated that the denervation device 270 may comprise an ablation device configured to denervate the tissue by means of surgical ablation, RF ablation, cryoablation, laser ablation, heat ablation, electrocautery, and chemical ablation. Figure 22’’’d shows an example of a surgical ablation device 272, comprising a lancet for making incisions in the nerve tissue. The lancet may be understood as a small, sharp instrument that can be used for performing a catheter-based ablation of the nerve. A control unit 240 may be provided for controlling the operation of one or more of the components of the system, i.e., one ormore of the inhibition device 40, the sensor device 250, and the denervation device 270. The control unit 240 may be arranged to receive a sensor signal from the sensor device 250, indicating a physical response in the effector tissue innervated by the stimulated nerve. By detecting a response in the tissue caused by the signal delivered by the inhibition device 40, it can be assumed that the inhibition device 40 has been inserted into the correct position or part of the patient’s body. It is important to note that although the implantable energized medical device is disclosed herein as having a third cross- sectional area being smaller than a first cross-sectional area, this feature is not essential. The third cross-sectional area may be equal to or larger than the first cross-sectional area. Figs.23 and 24 show an embodiment of an implantable energized medical device 140, which may be referred to as a remote unit in other parts of the present disclosure. The device 140 is configured to be held in position by a tissue portion 610 of a patient. The device 140 comprises a first portion 141’ configured to be placed on a first side 612 of the tissue portion 610, the first portion 141’ having a first cross- sectional area A1 in a first plane P1 and comprising a first surface 614 configured to face a first tissue surface 616 of the first side 612 of the tissue portion 610. The device 140 further comprises a second portion 141’’ configured to be placed on a second side 618 of the tissue portion610, the second side 618 opposing the first side 612, the second portion 141’’ having a second cross-sectional area A2 in a second plane P2 and comprising a second surface 620 configured to engage a second tissue surface 622 of the second side 618 of the tissue portion 610. The device 140 further comprises a connecting portion 142 configured to be placed through a hole in the tissue portion 610 extending between the first and second sides 612, 618 of the tissue portion 610. The connecting portion 142 here has a third cross-sectional area A3 in a third plane P3 and a fourth cross-sectional area A4 in a fourth plane P4 and a third surface 624 configured to engage the first tissue surface 616 of the first side 612 of the tissue portion 610. The connecting portion 142 is configured to connect the first portion 141’ to the second portion 141’’. The connecting portion 142 thus has a portion being sized and shaped to fit through the hole in the tissue portion 610, such portion having the third cross-sectional area A3. Furthermore, the connecting portion 142 may have another portion being sized and shaped to not fit through the hole in the tissue portion 610, such portion having the fourth cross-sectional area A4. Likewise, the second portion 141’’ may have a portion being sized and shaped to not fit through the hole in the tissue portion 610, such portion having the second cross-sectionalarea A2. Thus, the connecting portion 142 may cooperate with the second portion 141’’ to keep the device in place in the hole of the tissue portion 610. In the embodiment illustrated in Fig. 23, the first portion 141’ is configured to detachably connect, i.e. reversibly connect to the connecting portion 142 by a mechanical and/or magnetic mechanism. In the illustrated embodiment, a mechanic mechanism is used, wherein one or several spring-loaded spherical elements 601 lock in place in a groove 603 of the connecting portion 142 when the first portion 141’ is inserted into the connecting portion 142. Other locking mechanisms are envisioned, including corresponding threads and grooves, self- locking elements, and twist and lock fittings. The device 140 is configured such that, when implanted, the first portion 141’ will be placed closer to an outside of the patient than the second portion 141’’. Furthermore, in some implantation procedures the device 140 may be implanted such that space will be available beyond the second portion, i.e. beyond the second side 618 of the tissue portion 610, whereas there may not be as much space on the first side 612 of the tissue portion. Furthermore, tissue and/or skin may exert a force on the first portion 141’’ towards the tissue portion 610, and provide for that the second portion 141’’ does not travel through the hole in the tissue portion towards the first side 612 of the tissue portion. Thus, it is preferably if the device 140 is primarily configured to prevent the first portion 141’’ from travelling through the hole in the tissue portion 612 towards the second side 618 of the tissue portion 610. The first portion 141’ may further comprise one or several connections 605 for transferring energy and/or communication signals to the second portion 141’’ via the connecting portion 142. The connections 605 in the illustrated embodiment are symmetrically arranged around a circumference of a protrusion 607 of the first portion 141’ and are arranged to engage with a corresponding connection 609 arranged at an inner surface of the connecting portion 142. The protrusion 607 may extend in a central extension C1 of the central portion 142. The second portion 141’’ may also comprise one or several connections 611, which may be similarly arranged and configured as the connections 605 of the first portion 141’. For example, the one or several connections 611 may engage with the connection 609 of the connecting portion 142 to receive energy and/or communication signals from the first portion 141’. Although the protrusion 607 is illustratedseparately in Fig. 23, it is to be understood that the protrusion 607 may be formed as one integral unit with the first portion 141’. Other arrangements of connections are envisioned, such as asymmetrically arranged connections around the circumference of the protrusion 607. It is also envisioned that one or several connections may be arranged on the first surface 614 of the first portion 141’, wherein the connections are arranged to engage with corresponding connections arranged on the opposing surface 613 of the connectingportion. Such connections on the opposing surface 613 may cover a relatively large area as compared to the connection 609, thus allowing a larger area of contact and a higher rate and/or signal strength of energy and/or communication signal transfer. Furthermore, it isenvisioned that a physical connection between the first portion 141’, connecting portion 142 and second portion 141’’ may be replaced or accompanied by a wireless arrangement, as described further in other parts of the present disclosure. Any of the first surface 614 of the first portion 141’, the second surface 620 of the second portion 141’, the third surface 624 of theconnecting portion 142, and an opposing surface 613 of the connecting portion 142, may be provided with at least one of ribs, barbs, hooks, afriction enhancing surface treatment, and a friction enhancing material, to facilitate the device 140 being held in position by the tissue portion, and/or to facilitate that the different parts of the device are held in mutual position. The opposing surface 613 of the connecting portion 142 and the first surface 614 of the first portion 141’ may provide, fully or partly, a connection mechanism to detachably connect the first portion 141’ to the connecting portion 142. Such connection mechanisms have been described previously in the presented disclosure, and can be arranged on one or both of the opposing surface 613 and the first surface 614, and will not be further described here. The opposing surface 613 may be provided with a recess configured to house at least part of the first portion 141’. In particular, such recess may be configured to receive at least a portion of the first portion 141’, including the first surface 614. Similarly, the first surface 614 may be provided with a recess configured to house at least part of the connecting portion 142. In particular, such recess may beconfigured to receive at least a portion of the connecting portion 142, and in some embodiments such recess may be configured to receive at least one protruding element to at least partially enclose at least one protruding element or flange. In the illustrated embodiment, the first portion 141’ comprises a first energy storage unit 304a and a controller 300a comprising one or several processing units connected to the first energy storage unit 304a. The first energy storage unit 304a may be rechargeable by wireless transfer of energy. In some embodiments, the first energy storage unit 304a may be non-rechargeable. Upon reaching the life-time end of such first energy storage, a replacement first portion comprising a new first energy storage unit may simply be swapped in place for the first portion having the depleted first energy storage unit. The second portion 141’’ may further comprise a controller 300b comprising one or several processing units. As will be described in other parts of the present disclosure, the first portion 141’ and the second portion 141’’ may comprise one or several functional parts, such as receivers, transmitters, transceivers, control units, processing units, sensors, energy storage units, sensors, etc. The device 140 may be non-inflatable. The second portion 141’’ in the illustrated embodiment comprises a pump. However, it is to be understood that other embodiments of the second portion 141’’ could instead comprise an energy transceiver (or receiver and transmitter), an energy storage device, a controller, and other similar parts, so that the second portion could be configured to wirelessly transmit energyso that it can form a remote unit as described in relation to Figs 1–8A. Furthermore, although the connecting portion 142 is illustrated in Fig.1 as a separate unit, the connecting portion 142 may form part of the second portion 141’’. The first portion 141’ may be detachably connected to at least one of the connecting portion 142 and the second portion 141’’. As can be seen in Fig.24, the first, second, third and fourth planes P1, P2, P3 and P4, are parallel to each other. Furthermore, in the illustrated embodiment, the third cross-sectional area A3 is smaller than the first, second and fourth cross-sectional areas A1, A2 and A4, such that the first portion 141’, second portion 141’’ and connecting portion 142 are prevented from travelling through the hole in the tissue portion 610 in a direction perpendicular to the first, second and third planes P1, P2 and P3. Hereby, the second portion 141’’ and the connecting portion 142 can be held in position by the tissue portion 610 of the patient also when the first portion 141’ is disconnected from the connecting portion 142. It is to be understood that the illustrated planes P1, P2, P3 and P4 are merely an example of how such planes may intersect the device 140. Other arrangements of planes are possible, as long as the conditions above are fulfilled, i.e. that the portions have cross-sectional areas, wherein the third cross-sectional area in the third plane P3 is smaller than the first, second and fourth cross-sectional areas, and that the planes P1, P2, P3 and P4 are parallel to each other. The connecting portion 142 illustrated in Fig.24 may be defined as a connecting portion 142 comprising a flange 626. The flange 626 thus comprises the fourth cross-sectional area A4 such that the flange 626 is prevented from travelling through the hole in the tissue portion610 in a direction perpendicular to the first, second and third planes P1, P2 and P3. The flange 626 may protrude in a direction parallel to the first, second, third and fourth planes P1, P2, P3 and P4. This direction is perpendicular to a central extension C1 of the connecting portion 142.The connecting portion 142 is not restricted to flanges, however. Other protruding elements may additionally or alternatively be incorporated into the connecting portion 142. As such, the connecting portion 142 may comprise at least one protruding element comprising the fourth cross-sectional area A4, such that the at least one protruding element is prevented from travelling through the hole in the tissue portion 610, such that the second portion 141’’ and the connecting portion 142 can be held in position by the tissue portion 610 of the patient also when the first portion 141’ is disconnected from the connecting portion 142. The at least one protruding element may protrude in a direction parallel to the first, second, third and fourth planes P1, P2, P3 and P4. This direction is perpendicular to a central extension C1 of the connecting portion 142. As such, the at least one protruding element will also comprise the third surface configured to engage the first tissue surface 616 of the first side 612 of the tissue portion 610. The connecting portion 142 may comprise a hollow portion 628. The hollow portion 628 may provide a passage between the first and second portions 141’, 141’’. In particular, the hollow portion 628 may house a conduit for transferring fluid from the first portion 141’ to the second portion 141’’. The hollow portion 628 may also comprise or house one or several connections or electrical leads for transferring energy and/or communication signals between the first portion 141’ and the second portion 141’’. Some relative dimensions of the device 140 will now be described with reference to Figs.24 and 25A-3D, however it is to be understood that these dimensions may also apply to other embodiments of the device 140. The at least one protruding element 626 may have a height HF in a direction perpendicular to the fourth plane being less than a height H1 of the first portion 141’ in said direction. The height HF may alternatively be less than half of said height H1 of the first portion 141’ in said direction, less than a quarter of said height H1 of the first portion 141’ in said direction, or less than a tenth of said height H1 of the first portion 141’ in said direction.The height H1 of the first portion 141’ in a direction perpendicular to the first plane may be less than a height H2 of the second portion 141’’ insaid direction, such as less than half of said height H2 of the second portion 141’’in said direction, less than a quarter of said height H2 of thesecond portion 141’’in said direction, or less than a tenth of said height H2 of the second portion 141’’ in said direction. The at least one protruding element 626 may have a diameter DF in the fourth plane being one of less than a diameter D1 of the first portion 141’ in the first plane, equal to a diameter D1 of the first portion 141’ in the first plane, and larger than a diameter D1 of the first portion 141’ inthe first plane. Similarly, the cross-sectional area of the at least one protruding element 626 in the fourth plane may be less, equal to, or larger than a cross-sectional area of the first portion in the first plane.The at least one protruding element 626 may have a height HF in a direction perpendicular to the fourth plane being less than a height HC of the connecting portion 142 in said direction. Here, the height HC of the connecting portion 142 is defined as the height excluding the at least one protruding element, which forms part of the connecting portion 142. The height HF may alternatively be less than half of said height HC of the connecting portion 142 in said direction, less than a quarter of said height HC of the connecting portion 142 in said direction, or less than a tenth of said height HC of connecting portion 142 in said direction.As shown in Fig. 25D, the first portion 141’ may have a first cross-sectional area A1 being equal to or smaller than the third cross-sectional area A3 of the connecting portion 142. In particular, the first portion 141’ does not necessarily need to provide a cross-sectional area being larger than the third cross-sectional area of connecting portion 142, intended to pass through a hole in the tissue, if the connecting portion142 provides an additional cross-sectional area being larger than the third cross-sectional area of the connecting portion 142. The first portion 141’ as illustrated in Fig.25D may comprise the components discussed elsewhere in the present disclosure, although not shown, such as an energy storage unit, receiver, transmitter, etc. As shown in Figs.26A-4B, the at least one protruding element 626 may have an annular shape, such as a disk shape. However, elliptical, elongated and/or other polyhedral or irregular shapes are also possible. In the illustrated embodiment, the at least one protruding element 626 extends a full revolution around the center axis of the connecting portion 142. However, other arrangements are possible, wherein the at least one protruding element 626 constitute a partial circle sector. In the case of a plurality of protruding elements, such plurality of protruding elements may constitute several partial circle sectors. As shown in Figs.27A-5B, 28A-6B, the connecting portion 142 may comprise at least two protruding elements 626, 627. For example, theconnecting portion 142 may comprise at least three, four, five, fix, seven, eight, nine, ten protruding elements, and so on. In such embodiments, the at least two protruding elements 626, 627 may together comprise the fourth cross-sectional area, thus providing a necessary cross-sectional area to prevent the first portion and second portion from travelling through the hole in the tissue portion.The at least two protruding elements 626, 627 may be symmetrically arranged about the central axis of the connecting portion, as shown inFigs. 27A-27B, or asymmetrically arranged about the central axis of the connecting portion, as shown in Figs.28A-28B. In particular, the at least two protruding elements 626, 627 may be asymmetrically arranged so as to be located towards one side of the connecting portion 142, as shown in Figs.6A-6B. The arrangement of protruding element(s) may allow the device 140, and in particular the connecting portion 142, to be placed in areas of the patient where space is limited in one or more directions. The first portion 141’ may comprise a first energy storage unit for supplying the device 140 with energy.Although one type or embodiment of the implantable energized medical device 140, which may be referred to as a remote unit in other parts of the present disclosure, may fit most patients, it may be necessary to provide a selection of implantable energized medical devices 140 or portions to be assembled into implantable energized medical devices 140. For example, some patients may require different lengths, shapes,sizes, widths or heights depending on individual anatomy. Furthermore, some parts or portions of the implantable energized medical device140 may be common among several different types or embodiments of implantable energized medical devices, while other parts or portions may be replaceable or interchangeable. Such parts or portions may include energy storage devices, communication devices, fluid connections, mechanical connections, electrical connections, and so on.To provide flexibility and increase user friendliness, a kit of parts may be provided. The kit preferably comprises a group of one or more first portions, a group of one or more second portions, and a group of one or more connecting portions, the first portions, second portions and connecting portions being embodied as described throughout the present disclosure. At least one of the groups comprises at least two different types of said respective portions. By the term “type”, it is hereby meant a variety, class or embodiment of said respective portion. In some embodiments of the kit, the group of one or more first portions, the group of one or more second portions, and the group of one ormore connecting portions, comprise separate parts which may be assembled into a complete implantable energized medical device. The implantable energized medical device may thus be said to be modular, in that the first portion, the second portion, and/or the connecting portion may be interchanged for another type of the respective portion. In some embodiments, the connecting portion form part of the first portion or the second portion. With reference to Fig.29, the kit for assembling the implantable energized medical device comprises a group 650 of one or more first portions 141’, in the illustrated example a group of one first portion 141’, a group 652 of one or more connecting portions 142, in the illustrated example a group of three connecting portions 142, and a group 654 of one or more second portions 141’’, in the illustratedexample a group of two second portions 141’’. For simplicity, all types and combinations of first portions, second portions and connecting portions will not be illustrated or described in detail. Accordingly, the group 652 of one or more connecting portions 142 comprise three different types of connecting portions 142. Here, the different types of connecting portions 142 comprise connecting portions 142a, 142b, 142c having different heights. Furthermore, the group 654 of one or more second portions 141’’ comprise two different types of second portions 141’’.Here, the different types of second portions 141’’ comprise a second portion 141’’a being configured to excentrically connect to a connecting portion, having a first end and a second end as described in other parts of the present disclosure, wherein the second end of the second portion 141’’a comprises or is configured for at least one connection for connecting to an implant being located in a caudal direction from alocation of the implantable energized medical device in the patient, when the device is assembled. In the illustrated figure, the at least one connection is visualized as a lead or wire. However, other embodiments are possible, including the second end comprising a port, connector or other type of connective element for transmission of power, fluid, and/or signals.Furthermore, the different types of second portions 141’’ comprise a second portion 141’’b being configured to eccentrically connect to a connecting portion, having a first end and a second end as described in other parts of the present disclosure, wherein the first end of the second portion 141’’b comprises or is configured for at least one connection for connecting to an implant being located in a cranial directionfrom a location of the implantable energized medical device in the patient, when the device is assembled. In the illustrated figure, the at least one connection is visualized as a lead or wire. However, other embodiments are possible, including the first end comprising a port, connector or other type of connective element for transmission of power, fluid, and/or signals. Thus, the implantable energized medical device may be modular, and different types of devices can be achieved by selecting and combining a first portion 141’, a connecting portion 142, and a second portion 141’’, from each of the groups 652, 654, 656.In the illustrated example, a first implantable energized medical device 140a is achieved by a selection of the first portion 141’, the connectingportion 142a, and the second portion 141’’a. Such device 140a may be particularly advantageous in that the connecting portion 142a may be able to extend through a thick layer of tissue to connect the first portion 141’ and the second portion 141’’a. Another implantable energized medical device 140b is achieved by a selection of the first portion 141’, the connecting portion 142c, and the second portion 141’’b. Such device may be particularly advantageous in that the connecting portion 142c has a smaller footprint than the connecting portion 142a, i.e. occupying less space in the patient. Owing to the modular property of the devices 140a and 140b, a practician or surgeon may select a suitable connecting portion as needed upon having assessed the anatomy of a patient. Furthermore, since devices 140a and 140b share a common type of first portions 141’, it will not be necessary for a practician or surgeon to maintain a stock of different first portions (or a stock ofcomplete, assembled devices) merely for the sake of achieving a device having different connections located in the first end or second end of the second portion respectively, as in the case of second portions 141’’a, 141’’b. The example illustrated in Fig.29 is merely exemplifying to display the idea of a modular implantable energized medical device 140. The group 650 of one or more first portions 141’ may comprise a variety of different features, such as first portions with or without a first energy storage unit, with or without a first wireless energy receiver unit for receiving energy transmitted wirelessly by an external wireless energy transmitter, with or without an internal wireless energy transmitter, and/or other features as described throughout thepresent disclosure. Other features include different height, width, or length of the first portion. It is to be understood that first portions having one or more such features may be combined with a particular shape or dimensions to achieve a variety of first portions. The same applies to connecting portions and second portions. With reference to Fig.30, an embodiment of an implantable energized medical device 140, which may be referred to as a remote unit in other parts of the present disclosure, will be described. The device 140 is configured to be held in position by a tissue portion 610 of a patient. The device 140 comprises a first portion 141’ configured to be placed on a first side of the tissue portion 610, the first portion 141’having a first cross-sectional area in a first plane and comprising a first surface configured to face and/or engage a first tissue surface of the first side of the tissue portion 610. The device 140 further comprises a second portion 141’’ configured to be placed on a second side of the tissue portion 610, the second side opposing the first side, the second portion 141’’ having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion 610. The device 140 further comprises a connecting portion 142 configured to be placed through a hole in the tissue portion 610 extending between the first and second sides of the tissue portion 610. The connecting portion 142 here has a third cross-sectional area in a third plane. Theconnecting portion 142 is configured to connect the first portion 141’ to the second portion 141’’. Here, the first portion 141’ comprises a first wireless energy receiver 308a for receiving energy transmitted wirelessly by an external wireless energy transmitter, and an internalwireless energy transmitter 308a configured to transmit energy wirelessly to the second portion. Furthermore, the second portion herecomprises a second wireless energy receiver 308b configured to receive energy transmitted wirelessly by the internal wireless energy transmitter 308a. Although receivers and transmitters may be discussed and illustrated separately in the present disclosure, it is to be understood that the receivers and/or transmitters may be comprised in a transceiver. Furthermore, the receivers and/or transmitters in the first portion 141’ and second portion 141’’ respectively may form part of a single receiving or transmitting unit configured for receiving or transmitting energy and/or communication signals, including data. Furthermore, the internal wireless energy transmitter and/or a first wirelesscommunication receiver/transmitter may be a separate unit 308c located in a lower portion of the first portion 141’, referred to as aproximal end of the first portion 141’ in other parts of the present disclosure, close to the connecting portion 142 and the second portion 141’’. Such placement may provide for that energy and/or communication signals transmitted by the unit 308c will not be attenuated by internalcomponents of the first portion 141’ when being transmitted to the second portion 141’’. Such internal components may include a first energy storage unit 304a. The first portion 141’ here comprises a first energy storage unit 304a connected to the first wireless energy receiver 308a. The secondportion comprises a second energy storage unit 304b connected to the second wireless energy receiver 308b. Such an energy storage unit may be a solid-state battery, such as a thionyl-chloride battery. In some embodiments, the first wireless energy receiver 308a is configured to receive energy transmitted wirelessly by the external wireless energy transmitter and store the received energy in the first energy storage unit 304a. Furthermore, the internal wireless energy transmitter 308a is configured to wirelessly transmit energy stored in the first energy storage unit 304a to the second wireless energy receiver 308b, and the second wireless energy receiver 308b is configured to receive energy transmitted wirelessly by the internalwireless energy transmitter 308a and store the received energy in the second energy storage unit 305b. The first energy storage unit 304a may be configured to store less energy than the second energy storage unit 304b, and/or configured to be charged faster than the second energy storage unit 304b. Hereby, charging of the first energy storage unit 304a may be relatively quick, whereas transfer of energy from the first energy storage unit 304a to the second energy storage unit 304b may be relatively slow. Thus, auser can quickly charge the first energy storage unit 304a, and will not during such charging be restricted for a long period of time by being connected to an external wireless energy transmitter, e.g. at a particular location. After having charged the first energy storage unit 304a, the user may move freely while energy slowly transfers from the first energy storage unit 304a to the second energy storage unit 304b, via the first wireless energy transmitter 308a,c and the second wireless energy receiver 308b. The first portion may comprise a first controller comprising at least one processing unit 306a. The second portion may comprise a second controller comprising at least one processing unit 306b. At least one of the first and second processing unit 306a, 306b may be connected to a wireless transceiver 308a,b,c for communicating wirelessly with an external device. The first controller may be connected to a first wireless communication receiver 308a,c in the first portion 141’ for receiving wireless communication from an external device and/or from a wireless communication transmitter 308b in the second portion 141’’. Furthermore, the first controller may be connected to a first wireless communication transmitter 308a,c in the first portion 141’ for transmitting wirelesscommunication to a second wireless communication receiver 308b in the second portion 141’’. The second controller may be connected to the second wireless communication receiver 308b for receiving wireless communication from the first portion 141’. The second controller may further be connected to a second wireless communication transmitter 308b for transmitting wireless communication to the first portion 141’. In some embodiments, the first wireless energy receiver 308a comprises a first coil, and the wireless energy transmitter 308a,c comprises a second coil, as shown in Fig.40.The device may further comprising at least one sensor (not shown) for providing input to at least one of the first and second controller. Such sensor data may be transmitted to an external device via the first wireless communication transmitter 308a and/or the second wireless communication transmitter 308b. The sensor may be or comprise a sensor configured to sense a physical parameter of the device 140. The sensor may also be or comprise a sensor configured to sense at least one of a temperature of the device 140, a temperature of a body engaging portion, a parameter related to the power consumption of the device, a parameter related to the power consumption of a body engaging portion, a parameter related to a status of at least one of the first and second energy storage units 304a, 304b, such as a health status of at least one of the first and second energy storage units 304a, 304b, a parameter related to the wireless transfer of energy from a source external to the body of the patient, and a hydraulic pressure. By the term “health status” it is hereby meant a status indicating the current total capacity of the energy storage unit as compared to the total capacity of an unused energy storage unit. The sensor may also be or comprise a sensor configured to sense a physiological parameter of the patient, such as at least one of a parameter related to the patient swallowing, a local temperature, a systemic temperature, a blood saturation, a blood oxygenation, a blood pressure, a parameter related to an ischemia marker, or pH. The sensor configured to sense a parameter related to the patient swallowing may comprise at least one of a motility sensor, a sonic sensor, an optical sensor, and a strain sensor. The sensor configured to sense pH may be configured to sense the acidity in the stomach. The sensor may be configured to sense a temperature of the device 140, to avoid excessive heating of tissue connected to the device during operation of the device, or during operation of an external implant using the device, or charging of an energy storage unit in the device 140. Excessive heating may also damage the device and/or the energy storage unit. Excessive heating may also be an indicator that something iswrong with the device and may be used for triggering an alarm function for alerting the patient or physician. The sensor may also be configured to sense a parameter related to the power consumption of the device 140 or the power consumption of an external implant beingpowered by the device 140, to avoid excessive power consumption which may drain and/or damage the energy storage unit of the device 140. Excessive power consumption may also be an indicator that something is wrong with the device 140 and may be used for triggering an alarm function for alerting the patient or physician. Wireless energy receivers and/or communication receivers and/or transmitters in the first portion 141’ may be configured to receiveenergy from and/or communicate wirelessly with an external device outside the body using electromagnetic waves at a frequency below 100 kHz, or more specifically below 40 kHz, or more specifically below 20 kHz. The wireless energy receivers and/or communicationreceivers and/or transmitters in the first portion 141’ may thus be configured to communicate with the external device using “Very Low Frequency” communication (VLF). VLF signals have the ability to penetrate a titanium housing of the implantable energized medical device, such that the electronics of the implantable medical device can be completely encapsulated in a titanium housing. In addition, or alternatively, communication and energy transfer between the first portion 141’ and second portion 141’’ may be made using VLF signals. In such embodiments, receivers and transmitters (for energy and/or communication) of the first portion 141’ and second portion 141’’ are configured accordingly.With reference to Figs. 31, 34A and 34B, an embodiment of an implantable energized medical device 140, which may be referred to as a remote unit in other parts of the present disclosure, will be described. The device 140 is configured to be held in position by a tissue portion 610 of a patient. The device 140 comprises a first portion 141’ configured to be placed on a first side 612 of the tissue portion 610, the first portion 141’ having a first cross-sectional area A1 in a first plane P1 and comprising a first surface 614 configured to face and/or engage a first tissue surface 616 of the first side 612 of the tissue portion 610. The device 140 further comprises a second portion 141’’ configured tobe placed on a second side 618 of the tissue portion 610, the second side 618 opposing the first side 612, the second portion 141’’ having a second cross-sectional area A2 in a second plane P2 and comprising a second surface 620 configured to engage a second tissue surface622 of the second side 618 of the tissue portion 610. The device 140 further comprises a connecting portion 142 configured to be placed through a hole in the tissue portion 610 extending between the first and second sides 612, 618 of the tissue portion 610. The connecting portion 142 here has a third cross-sectional area A3 in a third plane P3. The connecting portion 142 is configured to connect the first portion141’ to the second portion 141’’. In the illustrated embodiment, a connecting interface 630 between the connecting portion 142 and the second portion 141’’ is excentric with respect to the second portion 141’’.The first portion 141’ has an elongated shape in the illustrated embodiment of Fig. 23. Similarly, the second portion 141’’ has an elongatedshape. However, the first portion 141’ and/or second portion 141’’ may assume other shapes, such as a flat disk e.g. having a width and length being larger than the height, a sphere, an ellipsoid, or any other polyhedral or irregular shape, some of these being exemplified in Figs.31- 33. As illustrated in Figs.34A and 34B, the connecting interface 630 between the connecting portion 142 and the second portion 141’’ may be excentric, with respect to the second portion 141’’ in a first direction 631, but not in a second direction 633 being perpendicular to the firstdirection. The first direction 631 is here parallel to the line A-A, to the second plane P2, and to a length of the second portion 141’’. The second direction 633 is here parallel to the line B-B, to the second plane P2, and to a width of the second portion 141’’. It is also possible thatthe connecting interface between the connecting portion 142 and the second portion 141’’ is excentric, with respect to the second portion 141’’, in the first direction 631 as well as in the second direction 633 being perpendicular to the first direction 631. Similarly, a connecting interface between the connecting portion 142 and the first portion 141’ may be excentric with respect to the first portion 141’ in the first direction 631, and/or in the second direction 633. The first portion 141’, connecting portion 142 and second portion 141’’ may structurally form one integral unit. It is however also possible that the first portion 141’ and the connecting portion 142 structurally form one integral unit, while the second portion 141’’ form a separate unit,or, that the second portion 141’’ and the connecting portion 142 structurally form one integral unit, while the first portion 141’ form a separate unit.Additionally, or alternatively, the second portion 141’’ may comprise a removable and/or interchangeable portion 639. In some embodiments, the removable portion 639 may form part of a distal region which will be further described in other parts of the present disclosure. Aremovable portion may also form part of a proximal region. Thus, the second portion 141’’ may comprise at least two removable portions, each being arranged at a respective end of the second portion 141’’. The removable portion 639 may house, hold or comprise one or severalfunctional parts of the device 140, such as gears, motors, connections, reservoirs, and the like as described in other parts of the present disclosure. An embodiment having such removable portion 639 will be able to be modified as necessary to circumstances of a particular patient. In the case of the first portion 141’, connecting portion 142 and second portion 141’’ structurally forming one integral unit, the excentric connecting interface between the connecting portion 142 and the second portion 141’’, with respect to the second portion 141’’, will provide for that the device 140 will be able to be inserted into the hole in the tissue portion. The device 140 may for example be inserted into the hole atan angle, similar to how a foot is inserted into a shoe, to allow most or all of the second portion 141’’ to pass through the hole, before it is angled, rotated, and/or pivoted to allow any remaining portion of the second portion 141’’ to pass through the hole and allow the device 140 to assume its intended position.As illustrated in Figs. 31, 32 and 33, the first portion 141’ may assume a variety of shapes, such as an oblong shape, a flat disk shape, a spherical shape, or any other polyhedral or irregular shape. Similarly, the second portion 141’’ may assume a variety of shapes, such as anoblong shape, a flat disk shape, a spherical shape, or any other polyhedral or irregular shape. The proposed shapes of the first and second portions 141’, 141’’ may be mixed and combined to form embodiments not exemplified in the illustrated embodiments. For example, one or both of the first and second portions 141’, 141’’ may have a flat oblong shape. In this context, the term “flat” is related to the height of the first or second portion 141’, 141’’, i.e. in a direction parallel to a central extension C1 of the connecting portion 142. The term “oblong” is related to a length of the first or second portion 141’, 141’’. A definition of such length is further discussed in other parts of the present disclosure.With reference to Figs.34A-34B, the second portion 141’’ has a first end 632 and a second end 634 opposing the first end 632. The length of the second portion 141’’ is defined as the length between the first end 632 and the second end 634. The length of the second portion 141’’ is furthermore extending in a direction being different to the central extension C1 of the connecting portion 142. The first end 632 and second end 634 are separated in a direction parallel to the second plane P2. Similarly, the first portion 141’ has a length between a first and a second end, the length extending in a direction being different to the central extension C1 of the connecting portion 142. The second portion 141’’ may be curved along its length. For example, one or both ends of the second portion 141’’ may point in a direction being substantially different from the second plane P2, i.e. curving away from or towards the tissue portion when implanted. In some embodiments, the second portion 141’’ curves within the second plane P2, exclusively or in combination with curving in other planes. The second portion 141’’ may also be curved in more than one direction, i.e. along its length and along its width, the width extending in a direction perpendicular to the length. The first and second ends 632, 634 of the second portion 141’’ may comprise an elliptical point respectively. For example, the first and second ends 632, 634 may comprise a hemispherical end cap respectively. It is to be understood that also the first and second ends of the first portion 141’ may have such features. The second portion 141’’ may have at least one circular cross-section along the length between the first end 632 and second end 634, asillustrated in Fig.31 . It is however possible for the second portion 141’’ to have at least one oval cross-section or at least one ellipticalcross-section along the length between the first end 632 and the second end 634. Such cross-sectional shapes may also exist between ends in a width direction of the second portion 141’’. Similarly, such cross-sectional shapes may also exist between ends in a length and/or width direction in the first portion 141’. In the following paragraphs, some features and properties of the second portion 141’’ will be described. It is however to be understood that these features and properties may also apply to the first portion 141’. The second portion 141’’ has a proximal region 636, an intermediate region 638, and a distal region 640. The proximal region 636 extends from the first end 632 to an interface between the connecting portion 142 and the second portion 141’’, the intermediate region 638 is defined by the connecting interface 630 between the connecting portion 142 and the second portion 141’’, and the distal region 640 extends from the connecting interface 630 between the connecting portion 142 and the second portion 141’’ to the second end 634. The proximal region 636 is shorter than the distal region 640 with respect to the length of the second portion, i.e. with respect to the length direction 631. Thus, a heel (the proximal region) and a toe (the distal region) is present in the second portion 141’’. The second surface 620, configured to engage with the second tissue surface 622 of the second side 618 of the tissue portion 610, is part of the proximal region 636 and the distal region 640. If a length of the second portion 141’’ is defined as x, and the width of the second portion 141’’ is defined as y along respective length and width directions 631, 633 being perpendicular to each other and substantially parallel to the second plane P2, the connecting interface between the connecting portion 142 and the second portion 141’’ is contained within a region extending from x>0 to x<x/2 and/or y>0 to y<y/2, x and y and 0 being respective end points of the second portion 141’’ along said length and width directions. In other words, the connecting interface between the connecting portion 142 and the second portion 141’’ is excentric in at least one direction with respect to the second portion 141’’, such that a heel and a toe is formed in the second portion 141’’. The first surface 614 configured to face and/or engage the first tissue surface 616 of the first side 612 of the tissue portion 610 may be substantially flat. In other words, the first portion 141’ may comprise a substantially flat side facing towards the tissue portion 610. Furthermore, an opposing surface of the first portion 141’, facing away from the tissue portion 610, may be substantially flat. Similarly, the second surface 620 configured to engage the second tissue surface 622 of the second side 618 of the tissue portion 610 may be substantially flat. In other words, the second portion 141’’ may comprise a substantially flat side facing towards the tissue portion 610. Furthermore, an opposing surface of the second portion 141’’, facing away from the tissue portion 610, may be substantially flat. The second portion 141’’ may be tapered from the first end 632 to the second end 634, thus giving the second portion 141’’ different heightsand/or widths along the length of the second portion 141’’. The second portion may also be tapered from each of the first end 632 and second end 634 towards the intermediate region 638 of the second portion 141’’.Some dimensions of the first portion 141’, the second portion 141’’ and the connecting portion 142 will now be disclosed. Any of the following disclosures of numerical intervals may include or exclude the end points of said intervals. The first portion 141’ may have a maximum dimension being in the range of 10 to 60 mm, such as in the range of 10 to 40 mm such as in the range of 10 to 30 mm, such as in the range of 10 to 25 mm, such as in the range of 15 to 40 mm, such as in the range of 15 to 35 mm, such as in the range of 15 to 30 mm, such as in the range of 15 to 25 mm. By the term “maximum dimension” it is hereby meant the largest dimension in any direction. The first portion 141’ may have a diameter being in the range of 10 to 60 mm, such as in the range of 10 to 40 mm such as in the range of 10to 30 mm, such as in the range of 10 to 25 mm, such as in the range of 15 to 40 mm, such as in the range of 15 to 35 mm, such as in the range of 15 to 30 mm, such as in the range of 15 to 25 mm. The connecting portion 142 may have a maximum dimension in the third plane P3 in the range of 2 to 20 mm, such as in the range of 2 to 15 mm, such as in the range of 2 to 10 mm, such as in the range of 5 to 10 mm, such as in the range of 8 to 20 mm, such as in the range of 8 to 15 mm, such as in the range of 8 to 10 mm.The second portion 141’’ may have a maximum dimension being in the range of 30 to 90 mm, such as in the range of 30 to 70 mm, such as in the range of 30 to 60 mm, such as in the range of 30 to 40 mm, such as in the range of 35 to 90 mm, such as in the range of 35 to 70 mm, such as in the range of 35 to 60 mm, such as in the range of 35 to 40 mm. The first portion has a first height H1, and the second portion has a second height H2, both heights being in a direction perpendicular to the first and second planes P1, P2. The first height may be smaller than the second height. However, in the embodiments illustrated in Figs.34A- 34B, the first height H1 is substantially equal to the second height H2. Other height ratios are possible, for example the first height H1 may be less than 2/3 of the second height H2, such as less than 1/2 of the second height H2, such as less than 1/3 of the second height H2, such as less than 1/4 of the second height H2, such as less than 1/5 of the second height H2, such as less than 1/10 of the second height H2. As illustrated in Figs.34A-34B, the proximal region 636 has a length 642 being shorter than a length 646 of the distal region 640. Theintermediate region 638 has a length 644, and a width 648. In some embodiments, the length 644 of the intermediate region 638 is longer than the width 648. In other words, the connecting interface between the connecting portion 142 and the second portion 141’’ may be elongated, having a longer dimension (in the exemplified case, the length) and a shorter dimension (in the exemplified case, the width). It is also possible that the length 644 of the intermediate region 638 is shorter than the width 648 of the intermediate region 638. The length 646 of the distal region 640 is preferably longer than the length 644 of the intermediate region 638, however, an equally long distal region 640 and intermediate region 638, or a shorter distal region 640 than the intermediate region 638, is also possible. The length 642 of the proximal region 636 may be shorter than, equal to, or longer than the length 644 of the intermediate region 638. The length 644 of the intermediate region 638 is preferably less than half of the length of the second portion 141’’, i.e. less than half of the combined length of the proximal region 636, the intermediate region 638, and the distal region 630. In some embodiments, the length 644 of the intermediate region 638 is less than a third of the length of the second portion 141’’, such as less than a fourth, less than a fifth, or less than a tenth of the length of the second portion 141’’. The connecting portion may have one of an oval cross-section, an elongated cross-section, and a circular cross-section, in a plane parallel to the third plane P3. In particular, the connecting portion may have several different cross-sectional shapes along its length in the central extension C1. Figs.34c-34d illustrate an embodiment similar to the one described in conjunction with Figs.34a-34b. However, the embodiment of Figs. 34c-34d lacks a proximal portion, i.e. the second portion 141’’ does not comprise a “heel”. Furthermore, such embodiment may have a connecting portion 142 having a length and width, in directions 631 and 633 respectively, being equal to a height of the second portion in adirection parallel to the central extension C1, as illustrated. Thus, the connecting portion 142 and the second portion 141’’ may be constituted by a substantially uniformly wide body. In some embodiments the distal region 640 is configured to be directed downwards in a standing patient, i.e. in a caudal direction when the device 140 is implanted. As illustrated in Figs.34A-34D, different orientations of the second portion 141’’ relative the first portion 141’ are possible. In some embodiments, a connection between either the first portion 141’ and the connecting portion 142, or between the second portion 141’’ and the connecting portion 142, may allow for a plurality of different connecting orientations. For example, a connection mechanism between the first portion 141’ and the connecting portion 142 (or between the second portion 141’’ and the connecting portion 142) may posses a 90 degree rotational symmetry to allow the second portion 141’ to be set in four different positions with respect to the first portion 141, each differing from the other by 90 degrees. Other degrees of rotational symmetry are of course possible, such as 30 degrees, 45 degrees, 60 degrees, 120 degrees, 180 degrees and so on. In other embodiments there are no connective mechanism between any of the first portion 141’, the connecting portion 142, and the second portion 141’’ (i.e. the portions are made as one integral unit), and in such cases different variants of the device 140 can be achieved during manufacturing. In other embodiments, the connective mechanism between the first portion 141’ and the connecting portion 142 (or between the second portion 141’’ and the connecting portion 142) is non-reversible, i.e. the first portion 141’ and the second portion 141’’ may initially be handled as separate parts, but the orientation of the second portion 141’’ relative the first portion 141’ cannot be changed once it has been selected and the parts have been connected via the connecting portion 142.The different orientations of the second portion 141’’ relative the first portion 141’ may be defined as the length direction of the second portion 141’’ having a relation or angle with respect to a length direction of the first portion 141’. Such angle may be 15 degrees, 30, 45, 60, 75 90, 105, 120, 135, 150, 165, 180, 195, 210, 225, 240, 255, 270, 285, 300, 315, 330, 345 or 360 degrees. In particular, the angle between thefirst portion 141’ and the second portion 141’’ may be defined as an angle in the planes P1 and P2, or as an angle in a plane parallel to the tissue portion 610, when the device 140 is implanted. In the embodiment illustrated in Figs.34A-34D, the length direction of the second portion 141’’ is angled by 0, 90, 180, and 270 degrees with respect to the length direction of the first portion 141’. The second end 634 of the second portion 141’’ may comprise one or several connections for connecting to an implant being located in a caudal direction from a location of the implantable energized medical device in the patient. Hereby, when the device 140 is implanted in a patient, preferably with the distal region 640 and second end 634 pointing downwards in a standing patient, the connections will be closer to the implant as the second end 634 will be pointing in the caudal direction whereas the first end 632 will be pointing in the cranial direction.It is also possible that the second end 634 of the second portion 141’’ is configured for connecting to an implant, i.e. the second end 634 may comprise a port, connector or other type of connective element for transmission of power, fluid, and/or signals. Likewise, the first end 632 of the second portion 141’’ may comprise one or several connections for connecting to an implant being located in a cranial direction from a location of the implantable energized medical device in the patient. Hereby, when the device 140 is implanted in a patient, preferably with the distal region 640 and second end 634 pointing downwards in a standing patient, the connections will be closer tothe implant as the first end 632 will be pointing in the cranial direction whereas the second end 634 will be pointing in the caudal direction.It is also possible that the first end 632 of the second portion 141’’ is configured for connecting to an implant, i.e. the first end 632 may comprise a port, connector or other type of connective element for transmission of power, fluid, and/or signals. Referring now to Figs.34e-k, 34m, 34n, 34p and 34q. The following will discuss some features of the first portion 141’, and in some cases additionally or alternatively of the connecting portion 142, which enable the first portion 141’ to increase its cross-sectional area in the first plane (i.e. to increase an area of the first surface configured to face the first tissue surface), and/or which enable the first portion 141’ to be rotated, translated, or otherwise moved in relation to the connecting portion 142. In some embodiments, the first portion 141’ will be configured to extend further away from the connecting portion 142 in or within the first plane. It is to be understood that these features can be combined with other features of the implantable energized medical device. In particular, the specific shape of the first portion, connecting portion and/or second portion in the illustrated embodiments are merely exemplary. Other shapes are possible, as discussed in the present disclosure. Accordingly, the elongated second portion 141’’ does not necessarily need to be elongated as shown for example in Fig.34e, and furthermore, the first portion 141’ does not necessarily need to have a semicircular shape. With reference to Fig.34e, an implantable energized medical device 140 is shown, wherein the first portion 141’ is configured and shaped such that an edge 710 of the first portion 141’ is substantially aligned with the connecting portion 142 with regard to the first direction 631. Inother words, no part of the first portion 141’ protrudes forward of the connecting portion 142 with regard to the first direction 631. Hereby, insertion of the implantable energized medical device 140 may be facilitated, in particular when angled downwards, since the first portion 141’ will not abut the tissue until most or all of the second portion 141’’ has been inserted through the hole in the tissue. Although the edge 710, as well as other edges of the first portion 141’, are hereby shown as having no radius, radiused edges are possible. Thus, the edge 710 may have a radius, and/or the first portion 141’, and/or the second portion 141’’, and/or the connecting portion 142, may comprise radiused edges. With reference to Figs.34f and 34g, a first portion 141’ is shown being configured to have its surface area increased. Here, the first cross-sectional area is increased, thereby increasing an area of the first surface configured to face (and in some embodiments also configured to contact) the first tissue surface. In the illustrated embodiment, the first portion 141’ comprises a first element 712 and a second element 714 being hingedly interconnected to allow the first element 712 to assume a first state (not shown) wherein the first element 712 is arranged on top of the second element 714, and a second state wherein the first element 712 is folded to be located adjacent or next to the second element 714. A similar configuration may be achieved by other means of interconnection between the first element 712 and second element714, i.e. the configuration is not limited to a hinge-type connection. For example, the first element 712 and second element 714 may beconstructed of a single piece of material being flexible enough to be able to fold over itself to assume the first and second state respectively. Preferably, the first and second element 712, 714 are interconnected and formed such that a transition between the first and second element 712, 714 along the first direction 631 is flush. Furthermore, while in the first state, the first portion 141’ may possess the same feature as discussed in conjunction with Fig.34e, i.e. the first portion 141’ may be substantially aligned with the connecting portion 142. With reference to Figs.34h and 34i, a first portion 141’ is shown being configured to have its surface area increased. Here, the first cross-sectional area is increased, thereby increasing an area of the first surface configured to face (and in some embodiments also configured to contact) the first tissue surface. In the illustrated embodiment, the first portion 141’ comprises a first element 712 and a second element 714. The second element 714 here comprises a slot 715 configured to partially or fully house the first element 712. The first element 712 is configured to rotate about an axis to assume a first state, wherein the first element 712 is partially or completely housed in within the slot 715, and a second state wherein the first element 712 protrudes from the slot 715 to increase the first cross-sectional area. The first element 712 may be configured to rotate 180 degrees about the axis. In the illustrated example, the first and second elements 712, 714 are shaped as semi-circles and form a shape conforming to a full circle in the second state. However, it is also possible that the first element 712 only rotate about the axis up to 90 degrees, thus forming a shape conforming to three quarters of a circle in the second state. Other shapes are also possible, e.g. polygons.With reference to Figs.34j and 34k, a similar configuration as described with reference to Figs.13h and 13i is shown. However, here the second element 714 does not comprise a slot, and the first element is thus not housed in a slot. Instead, the first element 712 is arranged on top of the second element 714 (similar to the embodiment of Figs.34f and 34g). The first portion 141’ is here configured to have its surface area increased, in particular the first cross-sectional area is increased, thereby increasing an area of the first surface configured to face(and in some embodiments also configured to contact) the first tissue surface. The first element 712 is configured to rotate about an axis toassume a first state, wherein the first element 712 is partially or completely arranged on top of the second element 714. Here, “completelyarranged on top of” means that the first element 712 is confined within the borders of the second element 714. By rotation of the firstelement 712 about the axis, the first element 712 can assume a second state wherein the first element 712 protrudes over an edge or border of the second element 714 to increase the first cross-sectional area. The first element 712 may be configured to rotate 180 degrees about the axis. However, it is also possible that the first element 712 only rotate about the axis up to 90 degrees. Other shapes of the first and second element 712, 714 are also possible, e.g. polygons. With reference to Figs.34m and 34n, a first portion 141’ is shown being configured to have its surface area increased. Here, the first cross-sectional area is increased, thereby increasing an area of the first surface configured to face (and in some embodiments also configured to contact) the first tissue surface. In the illustrated embodiment, the first portion 141’ comprises a first element 712 and a second element 714. The first element 712 here comprises a slot configured to partially or completely house the second element 714. The first element 712 isconfigured to assume a first state, as shown in Fig. 34m, wherein the second element 714 is arranged partially or fully within the slot of the first element 712, and a second state, as shown in Fig.34n, wherein the first element 712 has been moved in a first direction to cause thesecond element 714 to protrude from the slot of the first element 712, and to cause the first element 712 to extend further away from the connecting portion 142 in the first plane. As will be understood, other variations are possible, e.g. the second element 714 may comprise the slot, and the first element 712 may be partially or fully housed within such slot, and subsequently the first element 712 or the second element 714 may be moved to protrude from such slot. With reference to Figs.34p and 34q, a first portion 141’ is shown being configured to be moved in relation to the connecting portion 142. The expression “configured to be moved” may in this context be interpreted as the first portion 141’ being configured to assume at least two different positions with regard to the connecting portion 142 while still remaining in direct contact with the connecting portion. Here, the connecting portion 142 comprises a protruding element 717 and the first portion 141’ comprises a slot 718, wherein the protruding element 717 is configured to slide within the slot 718 along a predetermined path, e.g. in a first direction and a direction opposite said first direction. The protruding element 717 may be configured to be interlocked within the slot 718 such that the protruding element 717 can only be removed from the slot 718 in a preconfigured position. In other embodiments, the protruding element 717 may be permanently enclosed within the slot718. By sliding the first portion 141’ in the first direction, an extension of the first portion 141’ in the first plane with respect to the connecting portion 142 will be able to be adjusted. Any position between the endpoints of the slot 718 may be able to be assumed by the first portion 141’. In particular, first portion 141’ and/or the connecting portion 142 may comprise a locking mechanism configured to secure a position of the first portion 141’ in relation to the connecting portion 142. Such locking mechanism may rely on flexible parts being biased towards each other to maintain the first portion 141’ and connecting portion 142 in a fixed position in relation to each other. Other possible locking mechanisms include the use of friction, snap-locking means, etc.With reference to Figs.35 and 36, an embodiment of an implantable energized medical device 140, which may be referred to as a remote unit in other parts of the present disclosure, will be described. The device 140 is configured to be held in position by a tissue portion 610 of a patient. The device 140 comprises a first portion 141’ configured to be placed on a first side 612 of the tissue portion 610, the first portion 141’ having a first cross-sectional area in a first plane and comprising a first surface 614 configured to face and/or engage a first tissue surface 616 of the first side 612 of the tissue portion 610. The device 140 further comprises a second portion 141’’ configured to be placed ona second side 618 of the tissue portion 610, the second side 618 opposing the first side 612, the second portion 141’’ having a second cross- sectional area in a second plane and comprising a second surface 620 configured to engage a second tissue surface 622 of the second side 618 of the tissue portion 610. The device 140 further comprises a connecting portion 142 configured to be placed through a hole in the tissueportion 610 extending between the first and second sides 612, 618 of the tissue portion 610. The connecting portion 142 here has a third cross-sectional area in a third plane. The connecting portion 142 is configured to connect the first portion 141’ to the second portion 141’’. With reference to Fig.37, the first cross-sectional area has a first cross-sectional distance CD1a and a second cross-sectional distance CD2a, the first and second cross-sectional distances CD1a, CD2a being perpendicular to each other and the first cross-sectional distance CD1a being longer than the second cross-sectional distance CD2a. Furthermore, the second cross-sectional area has a first cross-sectional distance CD1b and a second cross-sectional distance CD2b, the first and second cross-sectional distances CD2a, CD2b being perpendicular to each other and the first cross-sectional distance CD1b being longer than the second cross-sectional distance CD2b. The first cross- sectional distance CD1a of the first cross-sectional area and the first cross-sectional distance CD1b of the second cross-sectional area are rotationally displaced in relation to each other with an angle exceeding 45° to facilitate insertion of the second portion 141’’ through the holein the tissue portion. In the embodiment illustrated in Fig. 37, the rotational displacement is 90°. The rotational displacement of the first portion 141’ and the second portion 141’’ forms a cross-like structure, being particularly advantageous in that insertion through the hole in the tissue portion 610 may be facilitated, and once positioned in the hole in the tissue portion 610 a secure position may be achieved. In particular, if the device 140 is positioned such that the second portion 141’’ has its first cross-sectional distance CD1b extending along a length extension of the hole 611 in the tissue portion 610, insertion of the second potion 141’’ through the hole 611 may be facilitated. Furthermore, if the first portion 141’ is then displaced in relation to the second portion 141’’ such thatthe first cross-sectional distance CD1a of the first portion 141’ is displaced in relation to a length extension of the hole 611, the first portion 141’ may be prevented from travelling through the hole 611 in the tissue portion. In these cases, it is particularly advantageous if the hole 611 in the tissue portion is oblong, ellipsoidal, or at least has one dimension in one direction being longer than a dimension in another direction. Such oblong holes in a tissue portion may be formed for example in tissue having a fiber direction, where the longest dimension of the hole may be aligned with the fiber direction. In the embodiment illustrated in Fig.35, the first surface 614 of the first portion 141’ is flat, thus providing a larger contact surface to thefirst tissue surface 616 and consequently less pressure on the tissue portion. A more stable position may also be achieved by the flat surface. Also the second surface 620 of the second portion 141’’ may be flat. However, other shapes, such as those described in other parts of the present disclosure, are possible.As shown in Fig.37, the connecting portion 142 may have an elongated cross-section in the third plane. It may be particularly advantageous if the connecting portion 142 has a longer length 644 than width 648, said length 644 extending in the same direction as a length direction of the second portion 141’’, i.e. in the same direction as an elongation of the second portion 141’’. Hereby, the elongation of the connecting portion 142 may run in the same direction as an elongation of the hole in the tissue portion. With reference to Fig.38, the rotational displacement of first cross-sectional distance of the first cross-sectional area and the first cross-sectional distance of the second cross-sectional area is shown, here at an angle about 45°. Accordingly, there is a rotational displacement,in the first, second and third planes, between a length direction 633 of the first portion 141’ and a length direction 631 of the second portion 141’’. Other angles of rotational displacement are possible, such as 60°, 75, 90°, 105°, 120°, 135°, etc.One and the same device 140 may be capable of assuming several different arrangements with regards to rotational displacement of the first portion 141’ and the second portion 141’’. In particular, this is possible when the first portion 141’ and/or the second portion 141’’ is configured to detachably connect to the interconnecting portion 142. For example, a connection mechanism between the first portion 141’ and the connecting portion 142, or between the second portion 141’’ and the connecting portion 142, may posses a rotational symmetry to allow the first portion 141’ to be set in different positions in relation to the connecting portion 142 and in extension also in relation to the second portion 141’’. Likewise, such rotational symmetry may allow the second portion 142’’ to be set in different positions in relation to the connecting portion 142 and in extension also in relation to the first portion 141’. With reference to Figs.39a-39c, a procedure of insertion of the device 140 in a tissue portion 610 will be described. The device 140 may be oriented such that a length direction 631 of the second portion 141’’ points downwards into the hole 611. Preferably, the second portion 141’’ is positioned such that it is inserted close to an edge of the hole 611. The second portion 141’’ may then be inserted partially through the hole 611, until the point where the first portion 141’ abuts the first tissue surface 616. Here, a 90° rotational displacement between the first portion 141’ and the second portion 141’’, as described above, will allow a relatively large portion of the second portion 141’’ to be inserted before the first portion 141’ abuts the first tissue surface 616. Subsequently, the device 140 may be pivoted to slide or insert the remaining portion of the second portion 141’’ through the hole 611. While inserting the remaining portion of the second portion 141’’, the tissue maynaturally flex and move to give way for the second portion 141’’. Upon having fully inserted the second portion 141’’ through the hole 611, such that the second portion 141’’ is completely located on the other side of the tissue portion 610, the tissue may naturally flex back. With reference to Fig.40, an embodiment of an implantable energized medical device 140, which may be referred to as a remote unit in other parts of the present disclosure, will be described. The device 140 is configured to be held in position by a tissue portion 610 of a patient. The device 140 comprises a first portion 141’ configured to be placed on a first side 612 of the tissue portion 610, the first portion 141’ having a first cross-sectional area in a first plane and comprising a first surface 614 configured to face and/or engage a first tissue surface of the first side 612 of the tissue portion 610. The device 140 further comprises a second portion 141’’ configured to be placed on asecond side 618 of the tissue portion 610, the second side 618 opposing the first side 612, the second portion 141’’ having a second cross- sectional area in a second plane and comprising a second surface 620 configured to engage a second tissue surface of the second side 618 of the tissue portion 610. The device 140 further comprises a connecting portion 142 configured to be placed through a hole in the tissue portion 610 extending between the first and second sides 612, 618 of the tissue portion 610. The connecting portion 142 here has a third cross-sectional area in a third plane. The connecting portion 142 is configured to connect the first portion 141’ to the second portion 141’’. At least one of the first portion and the second portion comprises at least one coil embedded in a ceramic material, the at least one coil being configured for at least one of: receiving energy transmitted wirelessly, transmitting energy wirelessly, receiving wireless communication, and transmitting wireless communication. In the illustrated embodiment, the first portion 141’ comprises a first coil 658 and a second coil 660, and the second portion 141’’ comprises a third coil 662. The coils are embedded in a ceramic material 664 As discussed in other part of the present disclosure, the first portion 141’ may comprise a first wireless energy receiver configured toreceive energy transmitted wirelessly from an external wireless energy transmitter, and further the first portion 141’ may comprise a first wireless communication receiver. The first wireless energy receiver and the first wireless communication receiver may comprise the first coil. Accordingly, the first coil may be configured to receive energy wirelessly, and/or to receive communication wirelessly. By the expression “the receiver/transmitter comprising the coil” it is to be understood that said coil may form part of the receiver/transmitter. The first portion 141’ comprises a distal end 665 and a proximal end 666, here defined with respect to the connecting portion 142. Inparticular, the proximal end 665 is arranged closer to the connecting portion 142 and closer to the second portion 141’’ when the device 140 is assembled. In the illustrated embodiment, the first coil 658 is arranged at the distal end 665. The first portion 141’ may comprise an internal wireless energy transmitter, and further a first wireless communication transmitter. In some embodiments, the internal wireless energy transmitter and/or the first wireless communication transmitter comprises the first coil 658. However, in some embodiments the internal wireless energy transmitter and/or the first wireless communication transmitter comprises the second coil 660. The second coil 660 is here arranged at the proximal end 665 of the first portion 141’. Such placement of the second coil 660 may provide for that energy and/or communication signals transmitted by the second coil 660 will not be attenuated by internal components of the first portion 141’ when being transmitted to the second portion 141’’. In some embodiments, the first wireless energy receiver and the internal wireless energy transmitter comprises a single coil embedded in a ceramic material. Accordingly, a single coil may be configured for receiving energy wirelessly and for transmitting energy wirelessly. Similarly, the first wireless communication receiver and the first wireless communication transmitter may comprise a single coil embeddedin a ceramic material. Even further, in some embodiments a single coil may be configured for receiving and transmitting energy wirelessly, and for receiving and transmitting communication signals wirelessly. The coils discussed herein are preferably arranged in a plane extending substantially parallel to the tissue portion 610. When utilizing one or several coils for receiving and/or transmitting communication signals or energy, it may be preferable to design the coils such that the transmitting coil have a diameter being larger than a diameter of the receiving coil. For example, a transmitting coil in anexternal device may have a diameter being larger than a receiving coil in the first portion 141’. Furthermore, a transmitting coil in the first portion 141’ may have a larger diameter than a receiving coil in the second portion 141’’. The diameter of the transmitting coil may be at least 30% larger, such as at least 50% larger, such as at least 100% larger, than the receiving coil.The second portion 141’’ may comprise a second wireless energy receiver, and/or a second wireless communication receiver. In some embodiments, the third coil 662 in the second portion 141’’ comprises the second wireless energy receiver and/or the second wireless communication receiver. The second portion 141’’ comprises a distal end 668 and a proximal end 670, here defined with respect to the connecting portion 142. In particular, the proximal end 668 is arranged closer to the connecting portion 142 and closer to the first portion 141’ when the device 140 isassembled. In the illustrated embodiment, the third coil 662 is arranged at the proximal end 668 of the second portion 141’’. Such placement of the third coil 662 may provide for that energy and/or communication signals received by the third coil 662 will not be attenuated by internal components of the second portion 141’’ when being received from the first portion 141’. The first portion 141’ may comprise a first controller 300a connected to the first coil 658, second coil 660, and/or third coil 662. The second portion 141’’ may comprise a second controller 300b connected to the first coil, 658, second coil 660, and/or third coil 662. In the illustrated embodiment , the first portion 141’ comprises a first energy storage unit 304a connected to the first wireless energy receiver 308a, i.e. the first coil 658. The second portion comprises a second energy storage unit 304b connected to the second wireless energy receiver 308b, i.e. the third coil 662. Such an energy storage unit may be a solid-state battery, such as a thionyl-chloride battery. In some embodiments, the first coil 658 is configured to receive energy transmitted wirelessly by the external wireless energy transmitter and store the received energy in the first energy storage unit 304a. Furthermore, the first coil 658 and/or the second coil 660 may be configured to wirelessly transmit energy stored in the first energy storage unit 304a to the third coil 662, and the third coil 662 may be configured to receive energy transmitted wirelessly by the first coil 658 and/or the second coil 660 and store the received energy in the second energy storage unit 305b. The first energy storage unit 304a may be configured to store less energy than the second energy storage unit 304b, and/or configured to be charged faster than the second energy storage unit 304b. Hereby, charging of the first energy storage unit 304a may be relatively quick, whereas transfer of energy from the first energy storage unit 304a to the second energy storage unit 304b may be relatively slow. Thus, auser can quickly charge the first energy storage unit 304a, and will not during such charging be restricted for a long period of time by being connected to an external wireless energy transmitter, e.g. at a particular location. After having charged the first energy storage unit 304a, the user may move freely while energy slowly transfers from the first energy storage unit 304a to the second energy storage unit 304b, viathe first and/or second coil and the third coil.Figs.41a and 41b illustrate a gear arrangement and magnetic coupling for coupling the implantable energized medical device to an implant (or element) exerting force on a body part, and in particular a gear arrangement for transferring mechanical movement through an outer housing of the device or an outer housing of the second portion 141’’. The housing 484 of the device or second portion 141’’ may be present in some embodiments of the device. In such embodiments, the housing 484 is configured to enclose, at least, the controller (not shown), motor M, any receivers and transmitters if present (not shown), and any gear arrangements G, G1, G2 if present. Hereby, such features are protected from bodily fluids. The housing 484 may be an enclosure made from one of or a combination of: a carbon based material (such as graphite, silicon carbide, or a carbon fiber material), a boron material, a polymer material (such as silicone, Peek®, polyurethane, UHWPE or PTFE,), a metallic material (such as titanium, stainless steel, tantalum, platinum, niobium or aluminum), a ceramic material (such as zirconium dioxide, aluminum oxide or tungsten carbide) or glass. In any instance the enclosure should be made from a material with low permeability, such that migration of fluid through the walls of the enclosure is prevented. The implantable energized medical device may comprise at least part of a magnetic coupling, such as a magnetic coupling part 490a. A complementary part of the magnetic coupling, such as magnetic coupling part 490b, may be arranged adjacent to the device 140, so as to magnetically couple to the magnetic coupling part 490a and form the magnetic coupling. The magnetic coupling part 490b may form part ofan entity not forming part of the device 140. However, in some embodiments the second portion 141’’ comprises several chambers being hermetically sealed from each other. Such chambers may be coupled via a magnetic coupling as discussed herein. The magnetic coupling 490a, 490b provide for that mechanical work output by the device 140 via e.g. an electric motor can be transferred from the device to e.g. an implant (or element) configured to exert force on a body part of a patient. In other words, the magnetic coupling 490a, 490b provides for that mechanical force can be transferred through the housing 484. The coupling between components, such as between a motor and gear arrangement, or between a gear arrangement and a magnetic coupling, may be achieved by e.g. a shaft or the like. In some embodiments, for example as illustrated in Fig.41a, a force output of a motor MO in the second portion 141’’ is connected to the magnetic coupling part 490a. The magnetic coupling part 490a transfers the force output from the motor MO to the magnetic coupling part 490b, i.e. via the magnetic coupling 490a, 490b. The force output transferred via the magnetic coupling 490a, 490b here has a torque T1, which is substantially the same torque as delivered by the motor MO. The magnetic coupling part 490b is connected to a gear arrangementG, located external to the device, for example in a medical implant configured to exert force on a body part, or intermediate to a medical implant configured to exert force on a body part. The gear arrangement G is configured to increase the torque of the force delivered via the magnetic coupling 490a, 490b to deliver a force with torque T2 being higher than torque T1 to a medical implant. Consequently, low torquemay be provided by the motor MO, i.e. a relatively small force with high angular velocity, which is transferred via the magnetic coupling 490a, 490b before the torque is increased via gear arrangement G to achieve a relatively large force with low angular velocity. Hereby, the magnetic coupling 490a, 490b may utilize relatively weak magnetic forces to transfer the mechanical work through the housing 484 of the device without the risk of slipping between the magnetic coupling parts 490a, 490b. In some embodiments, for example as illustrated in Fig.41b, a force output of a motor MO in the second portion 141’’ is connected to a first gear arrangement G1, which in turn is coupled to the magnetic coupling part 490a. The motor MO here provides a mechanical force with torque T0. The magnetic coupling part 490a transfers the force output from the motor MO to the first gear arrangement G1. The first geararrangement G1 is configured to increase the torque of the force delivered from the motor MO to deliver a force with a higher torque T1 tothe magnetic coupling 490a, 490b. The magnetic coupling part 490a transfers the force with torque T1 to the magnetic coupling part 490b. The magnetic coupling part 490b is connected to a second gear arrangement G2, located external to the device, for example in a medicalimplant configured to exert force on a body part, or intermediate to a medical implant configured to exert force on a body part. The second gear arrangement G2 is configured to increase the torque of the force delivered via the magnetic coupling 490a, 490b to deliver a force with torque T2 being higher than torque T1, and thus higher than torque T0, to a medical implant. Consequently, low torque may be provided by the motor MO, i.e. a relatively small force with high angular velocity. The torque of the force provided by the motor MO is then increased by the first gear arrangement G1, before the force is transferred via the magnetic coupling 490a, 490b. The torque of the force transferred via the magnetic coupling 490a, 490b is then yet again increased via the second gear arrangement G2 to achieve a relatively large force with low angular velocity. Hereby, the magnetic coupling 490a, 490b may utilize relatively weak magnetic forces to transfer the mechanicalwork through the housing 484 of the device without the risk of slipping between the magnetic coupling parts 490a, 490b. Furthermore, since some of the torque increase is made within the second portion 141’’, and a remaining portion of the torque increase is made external to thedevice and the second portion 141’’, the gear arrangements G1, G2 may be sized and configured appropriately to share the work of increasing the torque. Fig.41c schematically illustrates an energy storage 304b connected to a wireless energy transmitter 308. The energy storage 304b and the wireless energy transmitter 308 are arranged in one portion or chamber of the second portion 141’’. Furthermore, a wireless energy receiver 308e is arranged in another portion or chamber of the second portion 141’’. The portions or chambers may be separated or defined by respective housings, external walls and/or internal walls 484a, 484b. The wireless energy transmitter 308d is configured to wirelessly transmit energy to the wireless energy receiver 308e. Hereby, an internal energy transfer is achieved within the second portion 141’’. The wireless energy transmitter 308d and wireless energy receiver 308e may comprise one or more coils, respectively. The wireless energyreceiver 308e may be connected to a further energy storage 680 arranged within the second portion 141’’. Such energy storage 680 may be connected to a medical implant, such that the energy storage 680 can deliver energy to the medical implant. In some embodiments however, the wireless energy receiver 308e is directly connected to a medical implant to deliver energy directly to the medical implant, thus omitting the energy storage 680. With reference to Figs.42a-c, 43, 44, 45, and 46a-c, embodiments of an implantable energized medical device 140, which may be referred toas a remote unit in other parts of the present disclosure, will be described. As illustrated, these implantable energized medical devices have a second portion being shaped in a particular manner in order to facilitate removal of the implantable energized medical device once it hasbeen implanted for a period of time and fibrotic tissue has begun to form around the second portion. It is hereby disclosed that these typesof second portions, as illustrated in Figs. 42a-c, 43, 44, 45 and 46a-c, and as disclosed below, may be combined with any of the other features of the implantable energized medical device discussed in the present disclosure. The device 140 is configured to be held in position by a tissue portion 610 of a patient. The device 140 comprises a first portion 141’ configured to be placed on a first side 612 of the tissue portion 610, the first portion 141’ having a first cross-sectional area in a first plane and comprising a first surface configured to face and/or engage a first tissue surface 616 of the first side 612 of the tissue portion 610. The device 140 further comprises a second portion 141’’ configured to be placed on a second side 618 of the tissue portion 610, the second side 618 opposing the first side 612, the second portion 141’’ having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface 622 of the second side 618 of the tissue portion 610. The device 140 further comprises a connecting portion 142 configured to be placed through a hole in the tissue portion 610 extending between the first and second sides 612, 618 of the tissue portion 610. The connecting portion 142 here has a third cross-sectional area in a third plane. The connecting portion 142 is configured to connect the first portion 141’ to the second portion 141’’. In the illustrated embodiment, a connecting interface 630 between the connecting portion 142 and the second portion 141’’ is arranged at an end of the second portion 141’’. The first portion 141’ may have an elongated shape. Similarly, the second portion 141’’ may have an elongated shape. However, the first portion 141’ and/or second portion 141’’ may assume other shapes, such as a flat disk e.g. having a width and length being larger than the height, a sphere, an ellipsoid, or any other polyhedral or irregular shape, some of these being exemplified in Figs.31-44. To provide a frame of reference for the following disclosure, and as illustrated in Figs.24, 25 and 26, a first direction 631 is here parallel to the line A-A, to the second plane, and to a length of the second portion 141’’. A second direction 633 is here parallel to the line B-B, to the second plane, and to a width of the second portion 141’’. The second portion 141’’ has a first end 632 and a second end 634 opposing the first end 632. The length of the second portion 141’’ is defined as the length between the first end 632 and the second end 634. The length of the second portion 141’’ is furthermore extending in a direction being different to the central extension C1 of the connecting portion 142. The firstend 632 and second end 634 are separated in a direction parallel to the second plane. Similarly, the first portion 141’ has a length between a first and a second end, the length extending in a direction being different to the central extension C1 of the connecting portion 142. The first portion 141’, connecting portion 142 and second portion 141’’ may structurally form one integral unit. It is however also possible that the first portion 141’ and the connecting portion 142 structurally form one integral unit, while the second portion 141’’ form a separate unit,or, that the second portion 141’’ and the connecting portion 142 structurally form one integral unit, while the first portion 141’ form a separate unit. Additionally, or alternatively, the second portion 141’’ may comprise a removable and/or interchangeable portion 639 as described in other parts of the present disclosure.In the following paragraphs, some features and properties of the second portion 141’’ will be described. It is however to be understood that these features and properties may also apply to the first portion 141’. The second portion 141’’ has an intermediate region 638, and a distal region 640. A proximal region may be present, as described in other parts of the present disclosure, The intermediate region 638 is defined by the connecting interface 630 between the connecting portion 142 and the second portion 141’’, and the distal region 640 extends from the connecting interface 630 between the connecting portion 142 and the second portion 141’’ to the second end 634. The first surface 614 configured to face and/or engage the first tissue surface 616 of the first side 612 of the tissue portion 610 may be substantially flat. In other words, the first portion 141’ may comprise a substantially flat side facing towards the tissue portion 610. Furthermore, an opposing surface of the first portion 141’, facing away from the tissue portion 610, may be substantially flat. Similarly, the second surface 620 configured to engage the second tissue surface 622 of the second side 618 of the tissue portion 610 may besubstantially flat. In other words, the second portion 141’’ may comprise a substantially flat side facing towards the tissue portion 610. Furthermore, an opposing surface of the second portion 141’’, facing away from the tissue portion 610, may be substantially flat. The second portion 141’’ may be tapered from the first end 632 to the second end 634, thus giving the second portion 141’’ different heights and/or widths along the length of the second portion 141’’. The second portion may also be tapered from each of the first end 632 and second end 634 towards the intermediate region 638 of the second portion 141’’. Still referring to Figs.42a-c, 43, 44, 45, and 46a-c, the second portion 141’’ and connecting portion 142 here form a connecting interface 630. Furthermore, the second portion 141’’ has a lengthwise cross-sectional area along the first direction, wherein a second lengthwise cross- sectional area 690 is smaller than a first lengthwise cross-sectional area 689 and wherein the first lengthwise cross-sectional area 689 is located closer to the connecting interface 630 with regard to the first direction 631. Hereby, a tapered second portion is formed, being tapered towards the second end 634. The lengthwise cross-sectional area of the second portion 141’’ may decrease continuously from an end of the intermediate region 638 towards the second end 634, as illustrated for example in Fig.43. The decrease may be linear, as illustrated for example in Fig.43. However, other types of decreasing lengthwise cross-sectional areas are possible, such as a parabolic, exponential, stepwise, or stepwise with radiused edges between each step thus forming a smooth rounded contour. Figs.42b and 42c illustrate how the lengthwise cross-sectional area decrease over the length of the second portion 141’’ towards the second634, as viewed along the line A-A. Fig.42 illustrate the first lengthwise cross-sectional area 689, and Fig. 42c illustrate the second lengthwise cross-sectional area 690. In some embodiments, the lengthwise cross-sectional area may decrease over a majority of the length of the second portion towards the second end 634. In some embodiments, a decrease of the lengthwise cross-sectional area over at least ¼ of the length of the second portion towards the second end 634 may be sufficient. In the example illustrated in Fig.43, the lengthwise cross-sectional area decrease over about 85% of the length of the second portion. With the second portion 141’’ having rotational symmetry along the first direction 631, as illustrated for example in Fig.42a, the shape of the second portion 141’’ may be conical. As illustrated in Fig.44, the second portion 141’’ may have an upper surface, which include the second surface 620 configured to engage asecond tissue surface of the second side of the tissue portion as discussed in other parts of the present disclosure, wherein the upper surface or second surface 620 is substantially flat and parallel to the second plane. In some embodiments the upper surface may be substantially perpendicular to the central extension C1 of the connecting portion 142. Hereby, the second surface may be configured to lay flat against the second side of the tissue portion. In such embodiments, a lower surface of the second portion 141’’, opposite the second surface 620 and facing away from the first portion 141’, may be configured to taper towards the second end 634, thus achieving the decreasing lengthwise cross-sectional area along the first direction 631 towards the second end 634.Fig. 45 illustrate an embodiment wherein the lengthwise cross-sectional area decrease in a stepwise manner towards the second end 634 of the second portion 141’’. Here, the second portion 141’’ has three major segments 692, 693, 694 having substantially constant diameter and each respective diameter being smaller moving towards the second end 634, being connected by intermediate segments 695, 696, wherein the diameter decreases along the first direction 631. Other variations of major segments having substantially constant diameter, and intermediate segments, having a decreasing diameter along the first direction 631, are possible, such as at least two major segments connected by a single intermediate segment with decreasing diameter, at least four major segments connected by three intermediate segments with decreasing diameter, and so on.Referring now to Figs.46a-c, an implantable energized medical device similar to the one illustrated in Fig. 44 is illustrated. As can be seen in the perspective view of Fig.46a, the second portion 141’’ has a decreasing lengthwise cross-sectional area towards the second end. The upper surface 697 is also visible in this view, being substantially flat and providing a contact area to the second tissue surface 622. The first lengthwise cross-sectional area 689 is larger than the second cross-sectional area 690, as can be seen in Figs.27b-c, and the first lengthwise cross-sectional area 689 is located closer to the connecting interface between the connecting portion 142 and the second portion 141’’ with regard to the first direction.Referring now to Fig. 47, an implantable energized medical device which may incorporate one or several of the features described in conjunction with Figs.23-46c, and which may be referred to as a remote unit in other parts of the present disclosure, will be described. The device 140 is configured to be held in position by a tissue portion 610 of a patient. The device 140 comprises a first portion 141’ configured to be placed on a first side 612 of the tissue portion 610, the first portion 141’ having a first cross-sectional area in a first plane and comprising a first surface configured to face and/or engage a first tissue surface of the first side 612 of the tissue portion 610. The device 140 further comprises a second portion 141’’ configured to be placed on a second side 618 of the tissue portion 610, the second side 618 opposing the first side 612, the second portion 141’’ having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side 618 of the tissue portion 610. The device 140 further comprises a connecting portion142 configured to be placed through a hole in the tissue portion 610 extending between the first and second sides 612, 618 of the tissue portion 610. The connecting portion 142 is configured to connect the first portion 141’ to the second portion 141’’.The connecting portion 142 and the second portion 141’’ are configured to form a unit having a central axis C2 extending from a first end 650 of said unit to a second end 651 of said unit, the first end 650 being proximal to the first portion 141’ and the second end 651 being distal to the first portion 141’. The first end 650 may generally be defined as the interface between the connecting portion142 and the first portion 141’.A physical footprint of the unit perpendicular to the central axis C2 decreases continuously or stepwise from the first end 650 to the second end 651 of said unit. Here, the physical footprint 652 is smaller than the physical footprint 653 which is more proximal to the first end 650, the physical footprint 653 in turn being smaller than the physical footprint 654 which is even more proximal to the first end 650. The illustrated footprints 652, 653, 654 may be cross-sectional areas which are determined in a plane perpendicular to the central axis C2. The footprints 652, 653, 654 may also be seen as the extension of the unit in a plane perpendicular to the central axis C2. In embodiments where the unit comprises one or more bends or one or more angled sections, the physical footprint shall preferably decrease continuously or stepwise from the first end 650 to the second end 651 of the unit also along such bends or angled sections. By decreasing the physical footprint along the central axis C2, removal of the device 140 may be facilitated. In particular, the device 10 may more easily slide out of scar tissue which has formed around the implanted device 140. The connecting portion 142 and the second portion 141’’ may be configured to reversibly connect to each other to form the unit. Such a connection may be a snap-fit connection, a magnetic type connection, a threaded connection, or a combination thereof, as described in other parts of the present disclosure. An irreversible connection between the connecting portion 142 and the second portion 141’’ is also possible. In this sense, the term “irreversible” shall be understood as a connection which cannot be disengaged without damage or irreversible damage. It is also possible that the connecting portion 142 and the second portion 141’’ are formed as a single body forming the unit. In such cases there are no seal or interface between the connecting portion 142 and the second portion 141’’. The unit here comprises an angled section forming a bend in the unit. The bend being about 90° as measured from the first end 650 to the second end 651. Hereby, a secure position is achieved, and a smaller vertical footprint, i.e. the space occupied by the device in a direction inwards to the center of the patient, may be achieved. The bend may be between 15° and 165°, such as between 30° and 150°, such as between 45° and 135°, such as substantially 90°. Referring now to Figs.48a-48c, an implantable energized medical device which may incorporate one or several of the features described inconjunction with Figs. 23-47, and which may be referred to as a remote unit in other parts of the present disclosure, will be described. The device 140 is configured to be held in position by a tissue portion 610 of a patient. The device 140 comprises a first portion 141’ configured to be placed on a first side 612 of the tissue portion 610, the first portion 141’ having a first cross-sectional area in a first plane and comprising a first surface configured to face and/or engage a first tissue surface of the first side 612 of the tissue portion 610. The device 140 further comprises a second portion 141’’ configured to be placed on a second side 618 of the tissue portion 610, the second side 618 opposing the first side 612, the second portion 141’’ having a second cross-sectional area in a second plane and comprising a secondsurface configured to engage a second tissue surface of the second side 618 of the tissue portion 610. The device 140 further comprises a connecting portion 142 configured to be placed through a hole in the tissue portion 610 extending between the first and second sides 612, 618 of the tissue portion 610. The connecting portion 142 is configured to connect the first portion 141’ to the second portion 141’’. The device 140 further comprises a hermetic seal arrangement, which may cover the first portion 141’, the connecting portion 142 and the second portion 141’’, as visualized by hermetic seal arrangement 656a. Such hermetic seal arrangement may for example be achieved by a housing made of a metal, such as titanium. The hermetic seal arrangement may also cover only the connecting portion 142 and the second portion 141’’, as visualized by hermetic seal arrangement 656b. Such hermetic seal arrangement may be achieved by the flexible structure 655 being sealed with regard to the first portion 141’, and further wherein the flexible structure 655 is either joined with the second portion 141’’ in a sealing manner, or formed as an integral unit with the second portion 141’’.Any entry to the connecting portion 142 and/or the second portion 141’’, may be achieved by means of a sealed entry (not shown). Suchsealed entry can for example be achieved by a portion of an outside of connecting portion 142 and/or the second portion 141’’ comprising a ceramic portion integrated in, or brazed to, the material of the connecting portion 142 and/or the second portion 141’’ respectively. In suchcases, the material of the connecting portion 142 and/or the second portion 141’’ is preferably a metal, such as titanium. At least one metallic lead or conduit may travel through the sealed entry for transferring energy, information or fluid respectively from an outside of the device 140, also known as the wet side, to an inside of the device 140. The at least one metallic lead may in turn be integrated in, or brazedto, the ceramic portion. Thus, the at least one metallic lead can pass the sealed entry without being further insulated, such that the sealed entry can enable the transfer of electrical energy, information, or fluid, through a wall of titanium and ceramics, such that the connectingportion 142 and/or the second portion 141’’ can be hermetically enclosed by the hermetical seal arrangement which reduces the risk of any fluid diffusing into the device 140, and in particular into the connecting portion 142 and/or the second portion 141’’. Here, the connecting portion 142 comprises a flexible structure 655 enabling the connecting portion 142 to flex. As can be seen in Fig.48b, the connecting portion 142 may flex to accommodate for the thickness of the tissue portion 610, in this particular case the second portion 141’’ is flexing downwards and away from the first portion 141’. However, the flexible structure 655 may be configured to allow flexing in any and all directions. In some embodiments, the flexible structure 655 may be configured to allow roll, pitch, and/or upwards and downwards movement with regard to the first portion 141’ and/or second portion 141’’. As can be seen in Fig.48c, the connecting portion 142 may flex to accommodate for the thickness of the tissue portion 610, in this particular case the first portion 141’ is flexing downwards and towards the second portion 141’’. The flexible structure 655 here comprises a bellows, which may be annularly fixated by means of soldering or welding to the first portion141’ and/or the second portion 141’’. The bellows may be a metallic bellows, and more specifically may be a titanium bellows. The flexible structure 655 may thus be flexible by means of elasticity of the metal or the titanium. Metals are generally dense which is advantageous as fluids do not easily diffuse through the metal. This reduces the risk that gas or fluid diffuses into the device 140. The bellows of the flexible structure 655 may assume a relaxed state, i.e. where the structure is not biased. In such relaxed state the flexible structure 655 may have a length L1 as measured from the first portion 141’ to the second portion 141’’. Once the flexible structure 655 is compressed, the length of the flexible structure 655 may decrease to a length L2. Conversely, if the flexible structure 655 is pulled,the length of the flexible structure 655 may increase to L3, being larger than both L1. Depending on the corrugated structure of the bellows, e.g. the dimensions of the corrugations and their frequency along the length of the bellows, different degrees of flexibility may be achieved. The bellows comprise lowered portions and elevated portions. The lowered portions and elevated portions enable at least one of compression, expansion and flexing of the bellows. By compressing or expanding one side of the bellows, flexing of the first portion 141’ or second portion 141’’ may be achieved. If the bellows is made from a metal, the metal may be welded to form the corrugations of the bellows. Furthermore, the bellows, or the flexible structure 655, may form part of the hermetic seal arrangement. The flexible structure 655 may have a substantially cylindrical shape, as illustrated in Figs.48a-48c. Such shape may provide for that flexing is available in all directions with little to no variation in resistance depending on the flexing direction. Referring now to Figs.49a-49d, an implantable energized medical device similar to the one described in conjunction with Figs.48a-48c, and which may incorporate one or several of the features described in conjunction with Figs.23-47, and which may be referred to as a remote unit in other parts of the present disclosure, will be described. In particular, it is shown how the device 140 may be inserted into a hole 611 in a tissue portion 610 of a patient. Owing to the flexible structure 652 of the connecting portion 142, the first portion 141’ and second portion 141’’ can be separated to increase the distance between respective ends 657,659 of the first portion 141’ and second portion 141’’. Hereby, the second portion 141’’ can be inserted into the hole 611 in the tissue portion 610 without being hindered by the first portion 141’ abutting the tissue portion 610, as shown in Fig.49b. Once a sufficiently large portion of the second portion 141’’ has been inserted through the hole 611, the device 140 can be rotated to achieve the desired position in the tissue portion 610. Referring now to Fig.50a, an implantable energized medical device which may incorporate one or several of the features described in conjunction with Figs.23-49d, and which may be referred to as a remote unit in other parts of the present disclosure, will be described. The device 140 is configured to be held in position by a tissue portion of a patient. The device 140 comprises a first portion 141' configured to be placed on a first side of the tissue portion, the first portion 141' having a first cross-sectional area in a first plane and comprising a first surface configured to face and/or engage a first tissue surface of the first side of the tissue portion. The device 140 further comprises asecond portion 141'' configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion 141'' having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion. The device 140 further comprises a connecting portion 142 configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion. The connecting portion 142 is configured to connect the first portion 141' to the second portion 141''. The device 140 here comprises an internal component 685 arranged in the device 140, wherein the internal component 685 may havecapabilities of at least one of receiving wireless energy, transmitting wireless energy, receiving communication signals, and transmitting communication signals. The internal component 685, although here illustrated as a single unit, may comprise several units. The second portion 141’’ is here hermetically sealed by means of an outer wall 686 of the second portion comprising a metal, such as titanium. The second portion 141’’ may further comprise an internal component 684 having capabilities of at least one of receiving wireless energy, receiving wired energy, receiving communication signals, and transmitting communication signals. Such internal component 684 may comprise an electric motor, a pump, or the like.An outer wall of the first portion 141’ may comprise or consist of a polymer material. Accordingly, fluid will likely be able to permeate through the outer wall of the first portion 141’ over time when the device 140 is implanted. In order to protect components of the second portion 141’’, a hermetic seal is formed with respect to the connecting portion 142 and with respect to the first portion 141’. Furthermore, in order to achieve wired communication or energy transfer between the second portion 141’’ and the connecting portion 142,the outer wall 686 of the second portion 141’’ may comprise a ceramic portion 687 integrated in, or brazed to, the outer wall 686. Theceramic portion 687 may in turn comprise at least one metallic lead 691 travelling through the ceramic portion 687 for transferring electrical energy or information from within the second portion 141’’ to an outside of the second portion 141’’ and/or from the outside of thesecond portion 141’’, such as from the connecting portion 142, to an inside of the second portion 141’’. The outside of the second portion 141’’,being outside of the hermetic seal, is commonly referred to as the “wet” side. The at least one metallic lead 691 may in turn be integrated in, or brazed to, the ceramic portion 687, such that the at least one metallic lead 687 can pass the ceramic portion 687 without being further insulated. Similarly, the connecting portion 142 may comprise an outer wall comprising a metal, such as titanium. Such outer wall of the connecting portion 142 may form a hermetic seal. Furthermore, the outer wall of the connecting portion 142 may comprise a ceramic portion integrated in, or brazed to, the titanium (not shown). At least one metallic lead may travel through the ceramic portion for transferring electrical energy or information from within the connecting portion to an outside of the connecting portion and/or from the outside of the connecting portion to an inside of the connecting portion. The least one metallic lead may be integrated in, or brazed to, the ceramic portion of the connecting portion, such that the at least one metallic lead can pass said ceramic portion without being further insulated. The at least one metallic lead 691 may connect, or extend to form, an internal lead 698. Such internal lead 698 may be connected to the internal component 684, as illustrated. Accordingly, when the connecting portion 142 and the second portion 141’’ engage, the at least one metallic lead 691 will engage with a corresponding metallic lead 647 of the connecting portion to form a connection for transferring wired energy and/or wired communication signals. Owing to the integrated ceramic portion 687, the transfer of such wired energy and/or wired communication signals can be achieved through the boundary of the second portion 141’’ without breaking the hermetic seal. Referring now to Fig.50b, a device 140 similar to the one described in conjunction with Fig.50a is illustrated. However, here, no ceramic port is necessary since the internal component 685 located in the first portion 141’ and the internal component 684 located in the second portion 141’’ are configured to transmit and/or receive wireless energy and/or wireless communication signals. Thus, the outer wall 686 of the second portion 141’’, forming a hermetic seal, need not be penetrated. Referring now to Figs.51a and 51b, an implantable energized medical device which may incorporate one or several of the features described in conjunction with Figs.23-49b, and which may be referred to as a remote unit in other parts of the present disclosure, will be described. The device 140 is configured to be held in position by a tissue portion 610 of a patient. The device 140 comprises a first portion 141' configured to be placed on a first side of the tissue portion 610, the first portion 141' having a first cross-sectional area in a first plane and comprising a first surface configured to face and/or engage a first tissue surface of the first side of the tissue portion 610. The device 140 further comprises a second portion 141'' configured to be placed on a second side of the tissue portion 610, the second side opposing the first side, the second portion 141'' having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion 610. The device 140 further comprises a connecting portion 142 configured to be placed through a hole in the tissue portion 610 extending between the first and second sides of the tissue portion. The connecting portion 142 is configured to connect the first portion 141' to the second portion 141''. As illustrated in Fig.51a, the first portion 141’ is configured to be placed subcutaneously, which is also evident from its implanted position relative to the surface of the skin 699 of the patient.Furthermore, the first portion may comprise a connecting interface arrangement 641 configured to transfer wired energy and/or wired communication signals and/or fluid to an additional implant in the patient. The connecting interface arrangement 641 is here illustrated as a single unit, it is however to be understood that the connecting interface arrangement 641 may include one or several connecting interface units at different locations on the device 140. In particular, a connecting interface for fluid may require a separate connecting interface unit, or port, and a connecting interface for wired energy or communication signals may require another separate connecting interface unit. A lead, wire or fluid conduit 643 may form part of the device 140. Such components may also form part of a system which includes the device 140. The lead or wire 643 is configured to connect to the connecting interface arrangement 641 for transferring wired energy and/or wired communication signals. Similarly, the fluid conduit 643 is configured to connect to the connecting interface arrangement 641 fortransferring fluid to and from the device 140 and a body engaging implant implanted in another part of the patient’s body (not shown), and/or a reservoir implanted in another part of the patient’s body (not shown), and/or a pump implanted in another part of the patient’s body (not shown). By flipping the device 140 so that the first portion 140’ and the second portion 141’’ switch places, i.e. so that the second portion 141’’ is instead located closest to the surface of the skin 699, a wire, lead and/or fluid conduit 643 may run below the tissue portion 610 as opposed to above the tissue portion 610. Whether to run a lead, wire or fluid conduit below the tissue portion 610 or above the tissue portion 610 may be chosen depending on where the lead, wire or fluid conduit shall connect to an additional implant, where such additional implant is located, and/or how such additional implant is implanted. Thus, both the first portion 141’ and the second portion 141’’ may be configured to be placed subcutaneously, i.e. closest to the surface of the skin 699 relative to the tissue portion 610, such that the device 140 can be placed with either of the first portion 141’ and the second portion 141’’ on side of the tissue portion 610 being closest to the surface of the skin 699. The connecting interface arrangement 641 may alternatively or additionally be arranged at the second portion 141’’, as shown in Fig.51b. Thus, a lead, wire or fluid conduit may run above the tissue portion 610 even when the first portion portion 141’ is implanted below the tissue portion 610. Similarly, by flipping the device 140 as shown in Fig 51b, the first portion 141’ will be located above the tissue portion 610 and closest to the surface of the skin 699, and the second portion 141’’ will be located below the tissue portion. Thus, a lead, wire or fluid conduit may run below the tissue portion 610 in this configuration. The terms “above” and “below” in this context shall be understood as directional references where closer to the surface of the skin is “higher” or “above”, and further towards the center of the patient is “lower” or “below”. A height H1 of the first portion 141’ may be 15 mm or less, such as 10 mm or less, such as 7 mm or less, such as 5 mm or less. The height H1may be a maximum height of the first portion 141’, i.e. the height H1 may be defined as the height at the location where the first portion 141’ has the largest height. Likewise, a height H2 of the second portion 141’’ may be 15 mm or less, such as 10 mm or less, such as 7 mm or less,such as 5 mm or less. The height H2 may be a maximum height of the second portion 141’’, i.e. the height H2 may be defined as the height at the location where the first portion 141’’ has the largest height. A length L1 of the first portion 141’ and a length L2 of the second portion 141’’ may differ no more than 30%, such as no more than 15%, suchas no more than 5%, such as no more than 1%, such as wherein the length L1 of the first portion 141’ and the length L2 of the second portion 141’’ are substantially equal, as illustrated. Similarly, a width (not shown, measured in a direction extending inwards or outwards of the illustrated plane) W1 of the first portion 141’ and a width W2 of the second portion 141’’ may differ no more than 30%, such as no more than 15%, such as no more than 5%, such as no more than 1%, such as wherein the width W1 of the first portion 141’ and the width W2 of the second portion 141’’ are substantially equal. Similarly, a height H1 of the first portion 141’ and a height H2 of the second portion 141’’ may differ no more than 30%, such as no more than15%, such as no more than 5%, such as no more than 1%, such as wherein the height H1 of the first portion 141’ and the height H2 of the second portion 141’’ are substantially equal, as illustrated. The function and features of the controller comprised in the medical device (such as the internal controller CI, the externalcontroller CE, or comprised in a remote unit) for controlling the vibration device will now described with reference to figures 52a – 52f. Thefeatures of the controller described with reference to figs. 52a – 52f may be implemented and combined with any of the embodiments of vibration devices, in particular with the embodiments shown in Figs.1A–8 (with and without remote units) disclosed herein. The features may for example be implemented in the controllers (300) shown and described with reference to figs. 52A-U. Any controller CI, CE may comprise an internal computing unit, also called a processor or processing unit, and it may comprise a communication unit and implement methods for communication, including verification, authentication and encryption of data, as described in the following. The vibration device may hereinafter interchangeably be referred to as the implant or medical implant or medical device. The controller may comprise a collection of communication related sub-units such as a wired transceiver, a wireless transceiver, energy storage unit, an energy receiver, a computing unit, a memory, or a feedback unit. The sub-units of the controller may cooperate with each other or operate independently with different purposes. The sub-units of the controller may inherit the prefix “internal”. This is to distinguish these sub-units from the sub-units of the external devices as similar sub-units may be present for both the implanted controller and the external devices. The sub-units of the external devices may similarly inherit the prefix “external”. However, theterm external does not necessarily denote that the unit or sub-unit is intended to be positioned outside of the body of a patient. Instead, it relates to that the unit or sub-unit is external to the vibration device. A wireless transceiver may comprise both a wireless transmitter and a wireless receiver. The wireless transceiver may also comprise a first wireless transceiver and a second wireless transceiver. In this case, the wireless transceiver may be part of a first communication system (using the first wireless transceiver) and a second communication system (using the second wireless transceiver). In some embodiments, two communication systems may be implemented using a single wireless transceiver in e.g. the implantand a single wireless transceiver in e.g. an external device (i.e. one antenna at the implant and one antenna at the external device), but where for example the network protocol used for data transmission from the external device to the implant is different from the network protocol used for data transmission from the implant to the external device, thus achieving two separate communication systems. Alternatively, the wireless transceiver may be referred to as either a wireless transmitter or a wireless receiver as not all embodiments of secure wireless communication discussed herein require two-way communication capability of the wireless transceiver. The wireless transceiver may transmit or receive wireless communication via wireless connections. The wireless transceiver may connect to both the implant and to external devices, i.e. devices not implanted in the patient. The wireless connections may be based on radio frequency identification (RFID), near field charge (NFC), Bluetooth, Bluetooth low energy (BLE), or wireless local area network (WLAN). The wireless connections may further be based on mobile telecommunication regimessuch as 1G, 2G, 3G, 4G, or 5G. The wireless connections may further be based on modulation techniques such as amplitude modulation (AM), frequency modulation (FM), phase modulation (PM), or quadrature amplitude modulation (QAM). The wireless connection may further feature technologies such as time-division multiple access (TDMA), frequency-division multiple access (FDMA), or code-division multiple access (CDMA). The wireless connection may also be based on infra-red (IR) communication. The wireless connection may feature radio frequencies in the high frequency band (HF), very-high frequency band (VHF), and the ultra-high frequency band (UHF) as well as essentially any other applicable band for electromagnetic wave communication. The wireless connection may also be based on ultrasound communication to name at least one example that does not rely on electromagnetic waves. A wired transceiver may comprise both a wired transmitter and a wired receiver. The wording wired transceiver aims to distinguish between it and the wireless transceiver. It may generally be considered a conductive transceiver. The wired transceiver maytransmit or receive conductive communication via conductive connections. Conductive connections may alternatively be referred to as electrical connections or as wired connections. The wording wired however, does not imply there needs to be a physical wire for conducting the communication. The body tissue of the patient may be considered as the wire. Conductive connection may use the body of the patient as a conductor. Conductive connections may still use ohmic conductors such as metals to at least some extent, and more specifically at the interface between the wired transceiver and the chosen conductor. Communication, conductive or wireless may be understood as digital or analogue. In analogue communication, the message signal is in analogue form i.e., a continuous time signal. In digital communication, usually digital data i.e., discrete time signals containing information is transmitted. The controller may comprise a sensation generator. A sensation generator is a device or unit that generates a sensation. The sensation generated may be configured to be experienceable by the patient such that the patient may take actions to authenticate a device, connection or communication. The sensation generator may be configured to generate a single sensation or a plurality of sensation components. The sensation or sensation components may comprise a vibration (e.g., a fixed frequency mechanical vibration), a sound (e.g. asuperposition of fixed frequency mechanical vibrations), a photonic signal (e.g. a non-visible light pulse such as an infra-red pulse), a light signal (e.g. a visual light pulse), an electric signal (e.g. an electrical current pulse) or a heat signal (e.g. a thermal pulse). The sensation generator may be implanted, configured to be worn in contact with the skin of the patient or capable of creating sensation without being in physical contact with the patient, such as a beeping alarm. The sensations generated by the sensation generator may be configured to be experienceable by a sensory function or a sense of the patient from the list of tactile, pressure, pain, heat, cold, taste, smell, sight, and hearing. Sensations may be generated of varying poweror force as to adapt to sensory variations in the patient. Power or force may be increased gradually until the patient is able to experience the sensation. Variations in power or force may be controlled via feedback. Sensation strength or force may be configured to stay within safety margins. The sensation generator may be connected to the implant. The sensation generator may be comprised within the implant or be a separate unit. A motor, e.g., of the active device or unit of the implant, for controlling a physical function in the body of the patient may provide asecondary function as a sensation generator, generating a vibration or sound. Generation of vibrations or sounds of the motor may be achieved by operating the motor at specific frequencies. When functioning as to generate a sensation the motor may operate outside of its normal ranges for frequency controlling a physical function in the body. The power or force of the motor when operating to generate a sensation may also vary from its normal ranges for controlling a physical function in the body. The motor for use as an active device and a sensation generator could for example be an implantable brushless DC motor with integrated gear box, such as the motors provided by Maxon group or Dr. Fritz Faulhaber. An external device is a device which is external to the patient in which the implant is implanted in. The external device may also be enumerated (first, second, third, etc.) to separate different external devices from each other. Two or more external devices may be connected by means of a wired or wireless communication as described above, for example through IP (internet protocol), or a local area network (LAN). The wired or wireless communication may take place using a standard network protocol such as any suitable IP protocol (IPv4, IPv6) or Wireless Local Area Network (IEEE 802.11), Bluetooth, NFC, NFMI, RFID etc. The wired or wireless communication may takeplace using a proprietary network protocol. Any external device may also be in communication with the implant using wired or wireless communication according to the above. Communication with implanted devices may be thus accomplished with a wired connection, withwireless radiofrequency (RF) telemetry or near field magnetic induction (NFMI) technologies. Other methods of wireless communication maybe used to communicate with implants, including optical and ultrasound. Alternatively, the concept of intrabody communication may be used for wireless communication, which uses the conductive properties of the body to transmit signals, i.e., conductive (capacitive or galvanic) communication with the implant. Means for conductive communication between an external device and an implant may also be called “electrical connection” between an external device and an implant. The conductive communication may be achieved by placing a conductive member of the external device in contact with the skin of the patient. By doing this, the external device and/or the implant may assure thatit is in direct electrical connection with the other device. The concept relies on using the inherent conductive or electrical properties of ahuman body. Signals may preferably be configured to affect the body or body functions minimally. For conductive communication this may mean using low currents. A current may flow from an external device to an implant or vice versa. Also, for conductive communication, eachdevice may have a transceiver portion for transmitting or receiving the current. These may comprise amplifiers for amplifying at least the received current. The current may contain or carry a signal which may carry e.g., an authentication input, implant operation instructions, or information pertaining to the operation of the implant. Alternatively, conductive communication may be referred to as electrical or ohmic or resistive communication. The conductive member may be an integrated part of the external device (e.g., in the surface of a smartwatch that is intended to be in contact with the wrist of the person wearing it), or it may be a separate device which can be connected to the external device using a conductive interrace such as the charging port or the headphone port of a smartphone. A conductive member may be considered any device or structure set up for data communication with the implant via electric conductive body tissue. The data communication to the implant may be achieved by e.g., current pulses transmitted from the conductive member through the body of the patient to be received by a receiver at the implant. Any suitable coding scheme known in the art may be employed. The conductive member may comprise an energy storage unit such as a battery or receive energy from e.g., a connected external device. The term conductive interface is representing any suitable interface configured for data exchange between the conductive member and the external device. The conductive member may in an alternative configuration receive and transmit data to the external device through a radio interface, NFC, and the like. An external device may act as a relay for communication between an implant and a remote device, such as e.g., second, third, orother external devices. Generally, the methods of relaying communication via an external device may be preferable for a large number of reasons. The transmission capabilities of the implant may be reduced, reducing its technical complexity, physical dimensions, and medical effects on the patient in which the implant is implanted. Communication may also be more efficient as direct communication, i.e., without a relaying device, with an implant from a remote device may require higher energy transmissions to account for different mediums and different rates of attenuation for different communication means. Remote communication with lower transmission energy may alsoincrease the security of the communication as the spatial area or volume where the communication may be at all noticeable may be madesmaller. Utilizing such a relay system further enables the use of different communication means for communication with the implant and communication with remote devices that are more optimized for their respective mediums. An external device may be any device having processing power or a processor to perform the methods and functions needed to provide safe operation of the implant and provide the patient or other stakeholders (caregiver, spouse, employer etc.) with information and feedback from the implant. Feedback parameters could include battery status, energy level at the controller, the fluid level of the hydraulic restriction device, number of operations that the restriction device has performed, properties, version number etc. relating to functionality of the implantable medical device. The external device may for example be a handset such as a smartphone, smartwatch, tablet etc. handled by the patient or other stakeholders. The external device may be a server or personal computer handled by the patient or other stakeholders. The external device may be cloud based or a virtual machine. In the drawings, the external device handled by the patient is often shown as a smart watch, or a device adapted to be worn by the patient at the wrist of the patient. This is merely by way of example and any other type of external device, depending on the context, is equally applicable. Several external devices may exist such as a second external device, a third external device, or another external device. The above listed external devices may e.g., be available to and controllable by a patient, in which an implant is implanted, a caregiver of thepatient, a healthcare professional of the patient, a trusted relative of the patient, an employer or professional superior of the patient, a supplier or producer of the implant or its related features. By controlling the external devices may provide options for e.g., controlling or safeguarding a function of the implant, monitoring the function of the implant, monitoring parameters of the patient, updating or amending software of the implant etc. An external device under control by a supplier or producer of the implant may be connected to a database comprising data pertaining to control program updates and/or instructions. Such database may be regularly updated to provide new or improved functionality of the implant, or to mitigate for previously undetected flaws of the implant. When an update of a control program of an implant is scheduled, the updated control program may be transmitted from the database in a push mode and optionally routed via one or more further external devices before received by the implanted controller. In another embodiment, the update is received from the database by request from e.g., an external device under control by the patient having the implant implanted in his/her body, a pull mode. The external device may require authentication to be operated in communication with other external devices or the implant. Passwords, multi-factor authentication, biometric identification (fingerprint, iris scanner, facial recognition, etc.) or any other way of authentication may be employed. The external device may have a user interface (UI) for receiving input and displaying information/feedback from/to a user. The UI may be a graphical UI (GUI), a voice command interface, speaker, vibrators, lamps, etc. The communication between external devices, or between an external device and the implant may be encrypted. Any suitable type of encryption may be employed such as symmetric or asymmetric encryption. The encryption may be a single key encryption or a multi-key encryption. In multi-key encryption, several keys are required to decrypt encrypted data. The several keys may be called first key, second key, third key, etc. or first part of a key, second part of the key, third part of the key, etc. The several keys are then combined in any suitable way (depending on the encryption method and use case) to derive a combined key which may be used for decryption. In some cases, deriving a combined key is intended to mean that each key is used one by one to decrypt data, and that the decrypted data is achieved when using the final key. In other cases, the combination of the several key result in one “master key” which will decrypt the data. In other words, it is a form of secret sharing, where a secret is divided into parts, giving each participant (external device(s), internal device) its own unique part. To reconstruct the original message (decrypt), a minimum number of parts (keys) is required. In a threshold scheme this number is less than the total number of parts (e.g., the key at the implant and the key from one of the two external device are needed to decrypt the data). In other embodiments, all keys are needed to reconstruct the original secret, to achieve the combined key which may decrypt the data. In should be noted that it is not necessary that the generator of a key for decryption is the unit that in the end sends the key toanother unit to be used at that unit. In some cases, the generator of a key is merely a facilitator of encryption/decryption, and the workingon behalf of another device/user. A verification unit may comprise any suitable means for verifying or authenticating the use (i.e., user authentication) of a unit comprising or connected to the verification unit, e.g. the external device. For example, a verification unit may comprise or be connected to an interface (UI, GUI) for receiving authentication input from a user. The verification unit may comprise a communication interface for receiving authentication data from a device (separate from the external device) connected to the device comprising the verification unit. Authentication input/data may comprise a code, a key, biometric data based on any suitable techniques such as fingerprint, a palm vein structure, image recognition, face recognition, iris recognition, a retinal scan, a hand geometry, and genome comparison, etc. The verification/authentication may be provided using third party applications, installed at or in connection with the verification unit. The verification unit may be used as one part of a two-part authentication procedure. The other part may e.g., comprise conductive communication authentication, sensation authentication, or parameter authentication. The verification unit may comprise a card reader for reading a smart card. A smart card is a secure microcontroller that is typically used for generating, storing and operating on cryptographic keys. Smart card authentication provides users with smart card devices for the purpose of authentication. Users connect their smart card to the verification unit. Software on the verification unit interacts with the keys material and other secrets stored on the smart card to authenticate the user. In order for the smart card to operate, a user may need to unlock it with a user-PIN. Smart cards are considered a very strong form of authentication because cryptographic keys and other secrets stored on the card are very well protected both physically and logically, and are therefore hard to steal. The verification unit may comprise a personal e-ID that is comparable to, for example, passport and driving license. The e-ID system comprises is a security software installed at the verification unit, and a e-ID which is downloaded from a web site of a trusted provided or provided via a smart card from the trusted provider. The e-ID may comprise a hardware or a software key. The verification unit may comprise software for SMS-based two-factor authentication. Any other two-factor authentication systems may be used. Two-factor authentication requires two things to get authorized: something you know (your password, code, etc.) and something you have (an additional security code from your mobile device (e.g., a SMS, or a e-ID) or a physical token such as a smart card). Other types of verification/user authentication may be employed. For example, a verification unit which communicate with an external device using visible light instead of wired communication or wireless communication using radio. A light source of the verificationunit may transmit (e.g., by flashing in different patterns) secret keys or similar to the external device which uses the received data to verify the user, decrypt data or by any other means perform authentication. Light is easier to block and hide from an eavesdropping adversarythan radio waves, which thus provides an advantage in this context. In similar embodiments, electromagnetic radiation is used instead of visible light for transmitting verification data to the external device. Parameters relating to functionality of the implant may comprise for example a status indicator of the implant such as battery level, version of control program, properties of the implant, status of a motor of the implant, etc. Data comprising operating instructions sent to the implant may comprise a new or updated control program, parameters relating to specific configurations of the implant, etc. Such data may for example comprise instructions how to operate the body engaging portion of the implantable medical device, instructions to collect patient data, instructions to transmit feedback, etc. The expressions “confirming the electrical connection between an implant and an external device” or “authenticating a connection between an implant and an external device”, or similar expressions, are intended to encompass methods and processes for ensuring or be reasonably sure that the connection has not been compromised. Due to weaknesses in the wireless communication protocols, it is a simple task for a device to “listen” to the data and grab sensitive information, e.g., personal data regarding the patient sent from the implant, or even to try to compromise (hack) the implant by sending malicious commands or data to the implant. Encryption may not always be enough as a security measure (encryption schemes may be predictable), and other means of confirming or authenticating the external device being connected to the implant may be needed. The expression “network protocol” is intended to encompass communication protocols used in computer networks. a communication protocol is a system of rules that allow two or more entities of a communications system to transmit information via any kind of variation of a physical quantity. The protocol defines the rules, syntax, semantics and synchronization of communication and possible error recovery methods. Protocols may be implemented by hardware, software, or a combination of both. Communication protocols have tobe agreed upon by the parties involved. In this field, the term “standard” and “proprietary” is well defined. A communication protocol may be developed into a protocol standard by getting the approval of a standards organization. To get the approval the paper draft needs to enter and successfully complete the standardization process. When this is done, the network protocol can be referred to a “standard network protocol” or a “standard communication protocol”. Standard protocols are agreed and accepted by whole industry. Standard protocols are not vendor specific. Standard protocols are often, as mentioned above, developed by collaborative effort of experts from different organizations. Proprietary network protocols, on the other hand, are usually developed by a single company for the devices (or Operating System) which they manufacture. A proprietary network protocol is a communications protocol owned by a single organization or individual. Specifications for proprietary protocols may or may not be published, and implementations are not freely distributed. Consequently, any device may not communicate with another device using a proprietary network protocol, without having the license to use the proprietarynetwork protocol, and knowledge of the specifications for proprietary protocol. Ownership by a single organization thus gives the owner the ability to place restrictions on the use of the protocol and to change the protocol unilaterally. A control program is intended to define any software used for controlling the implant. Such software may comprise an operating system of the implant, of parts of an operating system or an application running on the implant such as software controlling a specific functionality of the implant (e.g., the active unit of the implant, feedback functionality of the implant, a transceiver of the implant,encoding/decoding functionality of the implant, etc.). The control program may thus control the medical function of the implant, for example the pressure applied by a member or the power of the electrical stimulation device. Alternatively, or additionally, the control program may control internal hardware functionality of the implant such as energy usage, transceiver functionality, etc. The systems and methods disclosed hereinabove may be implemented as software, firmware, hardware or a combination thereof. In a hardware implementation, the division of tasks between functional units referred to in the above description does not necessarily correspond to the division into physical units; to the contrary, one physical component may have multiple functionalities, and one task may be carried out by several physical components in cooperation. Certain components or all components may be implemented as software executed by a digital signal processor or microprocessor or be implemented as hardware or as an application-specific integrated circuit. Such software may be distributed on computer readable media, which may comprise computer storage media (or non-transitory media) and communication media (or transitory media). As is well known to a person skilled in the art, the term computer storage media includes both volatile and non-volatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information, and which can be accessed by a computer. Further, it is well known to the skilled person that communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media. A controller 300 for controlling the medical device according to any of the embodiments herein and for communicating withdevices external to the body of the patient and/or implantable sensors will now be described with reference to figures 52a - 52c. Figure 52a shows a patient when a medical device 10 comprising a controller 300 has been implanted. The medical device 10 comprises an active unit 302, which is the part of the medical device which comprises the one or more members and operation device for operating the members etc. The active unit is directly or indirectly connected to the stomach wall of the patient for stretching the stomach wall for creating a sensation of satiety. The active unit 302 is connected to the controller 300 via an electrical connection C2. The controller 300 (further described with reference to figure 52b) is configured to communicate with an external device 320 (further described withreference to figure 52c). The controller 300 can communicate wirelessly with the external device 320 through a wireless connection WL1, and/or through an electrical connection C1. Referring now to figure 52b, one embodiment of the controller 300 will be describe in more detail. The controller 300 comprises an internal computing unit 306 configured to control the function performed by the implantable medical device 10. The computing unit 306 comprises an internal memory 307 configured to store programs thereon. In the embodiment described in fig.52b, the internal memory 307 comprises a first control program 310 which can control the function of the medical device 10. The first control program 310 may be seen as a program with minimum functionality to be run at the medical device only during updating of the second control program 312. When the medical device is running with the first control program 310, the medical device may be seen as running in safe mode, with reduced functionality. For example, the first control program 310 may result in that no sensor data is stored in the medical device while being run, or that no feedback is transmitted from the medical device while the first control program 310 is running. By having a low complexity first control program, memory at the medical device is saved, and the risk of failure of the medical device during updating of the second control program 312 is reduced. The second control program 312 is the program controlling the medical device in normal circumstances, providing the medical device with full functionality and features. The memory 307 can further comprise a second, updatable, control program 312. The term updatable is to be interpreted as the program being configured to receive incremental or iterative updates to its code, or be replaced by a new version of the code. Updates may provide new and/or improved functionality to the implant as well as fixing previous deficiencies in the code. The computing unit 306 can receive updates to the second control program 312 via the controller 300. The updates can be received wirelessly WL1 or via the electrical connection C1. As shown in figure 52b, the internal memory 307 of the controller 300 can possibly store a third program 314. The third program 314 can control the function of the implantable medical device 10 and the computing unit 306 may be configured to update the second program 312 to the third program 314. The third program 314 can be utilized when rebooting an original state of the second program 312. The third program 314 may thus be seen as providing a factory reset of the controller 300, e.g., restore it back to factory settings. The third program 314 may thus be included in the implant 300 in a secure part of the memory 307 to be used for resetting the software (second control program 312) found in the controller 300 to original manufacturer settings. The controller 300 may comprise a reset function 316 connected to or part of the internal computing unit 306 or transmitted to said internal computing unit 306. The reset function 316 is configured to make the internal computing unit 306 switch from running the second control program 312 to the first control program 310. The reset function 316 could be configured to make the internal computing unit 306 delete the second control program 312 from the memory 307. The reset function 316 can be operated by palpating or pushing/put pressure on the skin of the patient. This could be performed by having a button on the implant. Alternatively, the reset function 316 can be invoked via a timer or a reset module. Temperature sensors and/ or pressure sensors can be utilized for sensing the palpating. The reset function 316 could also be operated by penetrating the skin of the patient. It is further plausible that the reset function 316 can be operated by magnetic means. This could be performed by utilizing a magnetic sensor and applying a magnetic force from outside the body. The reset function 316 could be configured such that it only responds to magnetic forces applied for a duration of time exceeding a limit, such as 2 seconds. The time limit could equally plausible be 5 or 10 seconds, or longer. In these cases, the implant could comprise a timer. The reset function 316 may thus include or be connected to a sensor for sensing such magnetic force. In addition to or as an alternative to the reset function described above, the implant may comprise an internal computing unit 306 (comprising an internal processor) comprising the second control program 312 for controlling a function of the implantable medical device, and a reset function 318. The reset function 318 may be configured to restart or reset said second control program 312 in response to: i.e., a timer of the reset function 318 has not been reset, or ii. a malfunction in the first control program 310. The reset function 318 may comprise a first reset function, such as, for example, comprise a computer operating properly, COP, function connected to the internal computing unit 306. The first reset function may be configured to restart or reset the first or the second control program 312 using a second reset function. The first reset function comprises a timer, and the first or the second control program is configured to periodically reset the timer. The reset function 318 may further comprise a third reset function connected to the internal computing unit and to the second reset function. The third reset function may in an example be configured to trigger a corrective function for correcting the first 310 or second control program 312, and the second reset function is configured to restart the first 310 or second control program 312 sometime after the corrective function has been triggered. The corrective function may be a soft reset or a hard reset. The second or third reset function may, for example, configured to invoke a hardware reset by triggering a hardware reset by activating an internal or external pulse generator which is configured to create a reset pulse. Alternatively, the second or third reset function may be implemented by software. The controller 300 may further comprise an internal wireless transceiver 308. The transceiver 308 communicates wirelessly with the external device 320 through the wireless connection W1. The transceiver may further communicate with an external device 320, 300 via wireless connection WL2 or WL4. The transceiver may both transmit and receive data via either of the connections C1, WL1, WL2 and WL4. Optionally, the external devices 320 and 300, when present, may communicate with each other, for example via a wireless connection WL3. The controller 300 can further be electrically connected C1 to the external device 320 and communicate by using the patient’s body as a conductor. The controller 300 may thus comprise a wired transceiver 303 or an internal transceiver 303 for the electrical connection C1. The confirmation/authentication of the electrical connection can be performed as described herein in the section for confirmation and/or authentication. In these cases, the implanted medical device and/or external device(s) 320 comprises the necessary features and functionality (described in the respective sections of this document) for performing such confirmation/authentication. By authenticating according to these aspects, security of the authentication may be increased as it may require a malicious third party to know or gain access to either the transient physiological parameter of the patient or detect randomized sensations generated at or within the patient. In figures 52a – 52c the patient is a human, but other mammals are equally plausible. It is also plausible that the communicationis performed by inductive means. It is also plausible that the communication is direct. The controller 300 of the implantable medical device 10 according to figure 52b further comprises a feedback unit 349. The feedback unit 349 provides feedback related to the switching from the second control program 312 to the first control program 310. The feedback could for example represent the information on when the update of the software, i.e., the second control program 312, has started, and when the update has finished. This feedback can be visually communicated to the patient, via for example a display on the external device 320. This display could be located on a watch, or a phone, or any other external device 320 coupled to the controller 300. Preferably, the feedback unit 349 provides this feedback signal wirelessly WL1 to the external device 320. Potentially, the words “Update started”, or “Update finished”, could be displayed to the patient, or similar terms with the same meaning. Another option could be to display different colors, where green for example could mean that the update has finished, and red or yellow that the update is ongoing. Obviously, any coloris equally plausible, and the user could choose these depending on personal preference. Another possibility would be to flash a light on the external device 320. In this case the external device 320 comprises the light emitting device(s) needed. Such light could for example be a LED. Different colors could, again, represent the status of the program update. One way of representing that the update is ongoing and not yet finished could be to flash the light, i.e., turning the light on and off. Once the light stops flashing, the patient would be aware of that theupdate is finished. The feedback could also be audible, and provided by the implantable medical device 300 directly, or by the external device 320. In such cases, the implantable medical device 10 and external device 320 comprises means for providing audio. The feedback couldalso be tactile, for example in the form of a vibration that the user can sense. In such case, either the implantable medical device 10 or external device 320 comprises means for providing a tactile sensation, such as a vibration and/or a vibrator. As seen in figure 52b, the controller 300 can further comprise a first energy storage unit 40A. The first energy storage unit 40A runs the first control program 310. The controller 300 further comprises a second energy storage unit 40B which runs the second controlprogram 312. This may further increase security during update, since the first control program 310 has its own separate energy storage unit 40A. The energy storage unit 40A can comprise a first energy storage 304a and/or a first energy receiver 305a. The second energy storage unit 40B can comprise a second energy storage 304b and/or a second energy receiver 305b. The energy can be received wirelessly by inductive or conductive means. An external energy storage unit can for example transfer an amount of wireless energy to the energy receiver 305a, 305b inside the patient’s body by utilizing an external coil which induces a voltage in an internal coil (not shown in figures). It is plausible that the first energy receiver 305a receives energy via a RFID pulse. The feedback unit 349 can provide feedback pertaining to the amount of energy received via the RFID pulse. The amount of RFID pulse energy that is being received can be adjusted based on the feedback, such that the pulse frequency is successively raised until a satisfying level is reached. The controller 300 of the medical device 10 according to figure 52b further comprises a feedback unit an electrical switch 309. The electrical switch 309 could be mechanically connected to a member of the medical device configured to exert a force on the stomachwall of the patient and being configured to be switched as a result of the force exerted on the stomach wall of the patient exceeding athreshold value. The switch 309 could for example be bonded to one of the members being connected to the stomach wall, in any of the embodiments herein, or to a portion of a fluid conduit, reservoir or hydraulic operation device, such as a pump, being in fluid connection with the member and be switched by the expansion, movement or bending of the member. The switch 309 could alternatively be electrically connected to the operation device and being configured to be switched as a result of the current supplied to the operation device exceedinga threshold value. The switch 309 could for example be connected to the motor and be configured to be switched if the current to the motor exceeds a threshold value. Such a switch could for example be a switch 309 configured to switch if exposed to a temperature exceeding a threshold value, such as a bimetal switch which is switched by the heat created by the flow of current to e.g., the motor. In the alternative, the switch 309 configured to switch if exposed to a temperature exceeding a threshold value could be placed at a different location on the medical device 10 to switch in case of exceeding temperatures, thereby hindering the medical device from overheating which may cause tissue damage. The switch 309 could either be configured to cut the power to the operation device or to generate a control signal to the processor 306 of the implantable controller 300, such that the controller 300 can take appropriate action, such as reducing power or turning off the operation device. The external device 320 is represented in figure 52c. The external device 320 can be placed anywhere on the patient’s body, preferably on a convenient and comfortable place. The external device 320 could be a wristband, and/or have the shape of a watch. It is also plausible that the external device is a mobile phone or other device not attached directly to the patient. The external device as shown infigure 52c comprises a wired transceiver 323, and an energy storage 324. It also comprises a wireless transceiver 328 and an energytransmitter 325. It further comprises a computing unit 326 and a memory 327. The feedback unit 322 in the external device 320 is configured to provide feedback related to the computing unit 326. The feedback provided by the feedback unit 322 could be visual. The external device 320 could have a display showing such visual feedback to the patient. It is equally plausible that the feedback is audible, and that the external device 320 comprises means for providing audio. The feedback given by the feedback unit 322 could also be tactile, such as vibrating. The feedback could also be provided in the form of a wireless signal WL1, WL2, WL3, WL4. The second, third or fourth communication methods WL2, WL3, WL4 may be a wireless form of communication. The second, third or fourth communication method WL2, WL3, WL4 may preferably be a form of electromagnetic or radio-based communication. The second,third and fourth communication method WL2, WL3, WL4 may be based on telecommunication methods. The second, third or fourthcommunication method WL2, WL3, WL4 may comprise or be related to the items of the following list: Wireless Local Area Network (WLAN), Bluetooth, Bluetooth 5, BLE, GSM or 2G (2nd generation cellular technology), 3G, 4G or 5G. The external device 320 may be adapted to be in electrical connection C1 with the medical device 10, using the body as a conductor. The electrical connection C1 is in this case used for conductive communication between the external device 320 and the medical device 10. In one embodiment, the communication between controller 300 and the external device 320 over either of the communication methods WL2, WL3, WL4, C1 may be encrypted and/or decrypted with public and/or private keys, now described with reference to Figs.52a– 52c. For example, the controller 300 may comprise a private key and a corresponding public key, and the external device 320 may comprise a private and a corresponding public key. The controller 320 and the external device 320 may exchange public keys and the communication may thus be performed using public key encryption. The person skilled in the art may utilize any known method for exchanging the keys. The controller may encrypt data to be sent to the external device 320 using a public key corresponding to the external device 320. The encrypted data may be transmitted over a wired, wireless or electrical communication channel C1, WL1, WL2, WL3 to the external device. The external device 320 may receive the encrypted data and decode it using the private key comprised in the external device 320,the private key corresponding to the public key with which the data has been encrypted. The external device 320 may transmit encrypted data to the controller 300. The external device 320 may encrypt the data to be sent using a public key corresponding to the private key of the controller 300. The external device 320 may transmit the encrypted data over a wired, wireless or electrical connection C1, WL1, WL2, WL3, WL4, directly or indirectly, to the controller of the implant. The controller may receive the data and decode it using the private key comprised in the controller 300. In an alternative to the public key encryption, described with reference to figs. 52a – 52c, the data to be sent between the controller 300 of the implantable medical device 10 and an external device 320, 330 or between an external device 320, 330 and thecontroller 300 may be signed. In a method for sending data from the controller 300 to the external device 320, 330, the data to be sent from the controller 300 may be signed using the private key of the controller 300. The data may be transmitted over a communication channel or connection C1, WL1, WL2, WL3, WL4. The external device 320, 330 may receive the message and verify the authenticity of the data using the public key corresponding to the private key of the controller 300. In this way, the external device 320, 330 may determine that the sender of the data was sent from the controller 300 and not from another device or source. A method for communication between external devices and the controller 300 of the implantable medical device 10 using acombined key is now described with reference to figs. 52a – 52c. A first step of the method comprises receiving, at the implant, by a wireless transmission WL1, WL2, WL3, WL4 or otherwise, a first key from an external device 320, 330. The method further comprises receiving, at the implant, by a wireless transmission WL1, WL2, WL3, a second key. The second key may be generated by a second external device, separate from the external device 320, 330 or by another external device being a generator of the second key on behalf of thesecond external device 320, 330. The second key may be received at the medical device from anyone of, the external device 320, the secondexternal device 330, and the generator of the second key. The second external device may be controlled by a caretaker, or any other stakeholder. Said another external device may be controlled by a manufacturer of the implant, or medical staff, caretaker, etc. In case the controller 300 is receiving the second key from the external device 320, this means that the second key is routed through the external device from the second external device 330 or from another external device (generator). The routing may be performed as described herein under the tenth aspect. In these cases, the implanted medical device and/or external device(s) comprises the necessary features and functionality (described in the respective sections of this document) for performing such routing. Using the external device 320 as a relay, with or without verification from the patient, may provide an extra layer of security as the external device 320 may not need to store or otherwise handle decrypted information. As such, the external device 320 may be lost without losingdecrypted information. The controller 300 a computing unit 306 configured for deriving a combined key by combining the first key and the second key with a third key held by the controller 300, for example in memory 307 of the controller 300. The third key could for example be a license number of the implant or a chip number of the implantable medical device. The combined key may be used for decrypting, by the computing unit 306, encrypted data transmitted by a wireless transmission WL1 from the external device 320 to the controller Optionally, the decrypted data may be used for altering, by the computing unit 306 an operation of the implantable medical device. The altering an operation of the implantable medical device may comprise controlling or switching an active unit 302 of the implantable medical device. In some embodiments, the method further comprises at least one of the steps of, based on the decrypted data, updating a control program running in the controller 300, and operating the implantable medical device 10 using operation instructions in the decrypted data. Methods for encrypted communication between an external device 320 and the controller 300 are provided. These methods may comprise: receiving, at the external device 320, by a wireless transceiver 328, a first key, the first key being generated by a second external device 330, separate from the external device 320 or by another external device being a generator of the second key on behalf of the second external device 330, the first key being received from anyone of the second external device 330 and the generator of the second key, receiving, at the external device 320 by the wireless transceiver 328, a second key from the controller 300, deriving a combined key, by a computing unit 326 of the external device 320, by combining the first key and the second key with a third key held by the external device 320 (e.g., in memory 307), transmitting encrypted data from the implant to the external device and receiving the encrypted data at the external device by the wireless transceiver 328, and decrypting, by the computing unit 326, the encrypted data, in the external device 320, using the combined key. As described above, further keys may be necessary to decrypt the data. Consequently, the wireless transceiver 328 is configured for: receiving a fourth key from a third external device, wherein the computing unit 326 is configured for: deriving a combined key by combining the first, second and fourth key with the third key held by the external device, and decrypting the encrypted data using the combined key. These embodiments further increase the security in the communication. The computing unit 326 may be configured to confirm the communication between the implantable medical device and the external device, wherein the confirmation comprises: measuring a parameter of the patient, by the external device 320, receiving a measured parameter of the patient, from the implantable medical device 10, comparing the parameter measured by the implantable medical device 10 to the parameter measured by the external device 320, performing confirmation of the connection based on the comparison, and as a result of the confirmation, decrypting the encrypted data, in the external device, using the combined key. The keys described in this section may in some embodiments be generated based on data sensed by sensors described herein under the twelfth or thirteenth aspect, e.g., using the sensed data as seed for the generated keys. A seed is an initial value that is fed into a pseudo random number generator to start the process of random number generation. The seed may thus be made hard to predict withoutaccess or knowledge of the physiological parameters of the patient which it is based on, providing an extra level of security to the generated keys. Further, increased security for communication between an external device(s) and the implantable medical device is provided. A method of communication between an external device 320 and an implantable medical device 10 is now described withreference to Figs.52a – 52c, when the implantable medical device 10 is implanted in a patient and the external device 320 is positioned external to the body of the patient. The external device 320 is adapted to be in electrical connection C1 with the controller 300, using the body as a conductor. The electrical connection C1 is used for conductive communication between the external device 320 and the implantable medical device 10. The implantable medical device 10 comprises the controller 300. Both the controller 300 and the external device 320 comprises a wireless transceiver 308, 208 for wireless communication C1 between the controller 300 and the external device 320. The wireless transceiver 308 (included in the controller 300) may in some embodiments comprise sub-transceivers for receiving data from the external device 320 and other external devices, e.g., using different frequency bands, modulation schemes etc. In a first step of the method, the electrical connection C1 between the controller 300 and the external device 320 is confirmedand thus authenticated. The confirmation and authentication of the electrical connection may be performed as described herein under thefifth, thirteenth and fifteenth aspect. In these cases, the implant and/or external device(s) comprises the necessary features and functionality (described in the respective sections of this document) for performing such authentication. By authenticating according tothese aspects, security of the authentication may be increased as it may require a malicious third party to know or gain access to either the transient physiological parameter of the patient or detect randomized sensations generated at or within the patient. The implant may comprise a first transceiver 303 configured to be in electrical connection C1 with the external device, using the body as a conductor. The implantable medical device may comprise a first external transmitter 203 configured to be in electricalconnection C1 with the implantable medical device, using the body as a conductor, and the wireless transmitter 208 configured to transmitwireless communication W1 to the controller 300. The first transmitter 323 of the external device 320 may be wired or wireless. The first transmitter 323 and the wireless transmitter 208 may be the same or separate transmitters. The first transceiver 303 of the controller 300 may be wired or wireless. The first transceiver 303 and the wireless transceiver 102 may be the same or separate transceivers. The controller 300 may comprise a computing unit 306 configured to confirm the electrical connection between the external device 320 and the internal transceiver 303 and accept wireless communication WL1 (of the data) from the external device 320 on the basis of the confirmation. Data is transmitted from the external device 320 to the controller 300 wirelessly, e.g., using the respective wireless transceiver 308, 208 of the controller 300 and the external device 320. Data may alternatively be transmitted through the electrical connection C1. As a result of the confirmation, the received data may be used for instructing the implantable medical device 10. For example, a control program 310 running in the controller 300 may be updated, the controller 300 may be operated using operation instructions in the received data. This may be handled by the computing unit 306. The method may comprise transmitting data from the external device 320 to the controller 300 wirelessly comprises transmitting encrypted data wirelessly. To decrypt the encrypted data (for example using the computing unit 306), several methods may be used. In one embodiment, a key is transmitted using the confirmed conductive communication channel C1 (i.e., the electrical connection) from the external device 320 to the controller 300. The key is received at the controller (by the first internal transceiver 303). The key is then used for decrypting the encrypted data. In some embodiments the key is enough to decrypt the encrypted data. In other embodiments, further keys are necessary to decrypt the data. In one embodiment, a key is transmitted using the confirmed conductive communication channel C1 (i.e., the electrical connection) from the external device 320 to the controller 300. The key is received at the controller 300 (by the first internal transceiver 303). A second key is transmitted (by the wireless transceiver 208) from the external device 320 using the wireless communication WL1 and received at the controller 300 by the wireless transceiver 308. The computing unit 306 is then deriving a combined key from the key and second key and uses this for decrypting the encrypted data. In yet other embodiments, a key is transmitted using the confirmed conductive communication channel C1 (i.e., the electrical connection) from the external device 320 to the controller 300. The key is received at the controller (by the first internal transceiver 303). A third key is transmitted from a second external device 330, separate from the external device 320, to the implant wirelessly WL2. The third key may be received by a second wireless receiver (part of the wireless transceiver 308) of the controller 300 configured for receiving wireless communication WL2 from second external device 330. The first and third key may be used to derive a combined key by the computing unit 306, which then decrypts the encrypted data. The decrypted data is then used for instructing the implantable medical device 10 as described above. The second external device 330 may be controlled by for example a caregiver, to further increase security and validity of data sent and decrypted by the controller 300. It should be noted that in some embodiments, the external device is further configured to receive WL2 secondary wireless communication from the second external device 330, and transmit data received from the secondary wireless communication WL2 to the implantable medical device. This routing of data may be achieved using the wireless transceivers 308, 208 (i.e., the wireless connection WL1, or by using a further wireless connection WL4 between the controller 300 and the external device 320. In these cases, the medical device and/or external device(s) comprises the necessary features and functionality for performing such routing. Consequently, in some embodiments, the third key is generated by the second external device 330 and transmitted WL2 to the external device 320 which routes the third key to the controller 300 to be used for decryption of the encrypted data. In other words, the step of transmitting a third key from a second external device, separate from the external device, to the implant wirelessly, comprises routing the third key through the external device 320. Using the external device 320 as a relay, with or without verification from the patient, may provide an extra layer of security asthe external device 320 may not need to store or otherwise handle decrypted information. As such, the external device 320 may be lost without losing decrypted information. In yet other embodiments, a key is transmitted using the confirmed conductive communication channel C1 (i.e., the electrical connection) from the external device 320 to the controller 300. The key is received at the implant (by the first internal transceiver 303). A second key is transmitted from the external device 320 to the controller 300 wirelessly WL1, received at the at the controller 300. A third key is transmitted from the second external device, separate from the external device 320, to the controller 300 wirelessly WL4. Encrypted data transmitted from the external device 320 to the controller 300 is then decrypted using a derived combined key from the key, the second key and the third key. The external device may be a wearable external device. The external device 320 may be a handset. The second external device 330 may be a handset. The second external device 330 may be a server. The second external device 330 may be cloud based. In some embodiments, the electrical connection C1 between the external device 320 and the controller 300 is achieved by placinga conductive member 201, configured to be in connection with the external device 200, in electrical connection with a skin of the patient for conductive communication C1 with the medical device. In these cases, the medical device and/or external device(s) comprises the necessary features and functionality (described in the respective sections of this document) for performing such conductive communication. The communication may thus be provided with an extra layer of security in addition to the encryption by being electrically confined to the conducting path e.g., external device 320, conductive member 201, conductive connection C1, controller 300, meaning the communication will be excessively difficult to be intercepted by a third party not in physical contact with, or at least proximal to, the patient. The keys described in this section may in some embodiments be generated based on data sensed by sensors described herein,e.g., using the sensed data as seed for the generated keys. A seed is an initial value that is fed into a pseudo random number generator to start the process of random number generation. The seed may thus be made hard to predict without access or knowledge of the physiological parameters of the patient which it is based on, providing an extra level of security to the generated keys. Increased security for communication between an external device(s) and an implanted medical device is provided, now describedwith reference to figs. 52a – 52c. In these embodiments, a method for communication between an external device 320 and the implantable controller 300 is provided. The wireless transceiver 308 (included in the controller 300) may in some embodiments comprise sub-transceivers forreceiving data from the external device 320 and other external devices 330, e.g., using different frequency bands, modulation schemes etc. A first step of the method comprises receiving, at the implanted medical device, by a wireless transmission WL1 or otherwise, afirst key from an external device 320. The method further comprises receiving, at the implanted medical device, by a wireless transmission WL1, WL2, WL3, a second key. The second key may be generated by a second external device 330, separate from the external device 320 or by another external device being a generator of the second key on behalf of the second external device 330. The second key may be received at the implanted medical device from anyone of, the external device 320, the second external device 330, and a generator of the second key. The second external device 330 may be controlled by a caretaker, or any other stakeholder. Said another external device maybe controlled by a manufacturer of the medical device, or medical staff, caretaker, etc. In case the medical device is receiving the second key from the external device 320, this means that the second key is routed through the external device from the second external device 330 or from the another external device (generator). In these cases, the medical device and/or external device(s) comprises the necessary features and functionality (described in the respective sections of this document) for performing such routing. Using the external device 320 as a relay, with or without verification from the patient, may provide an extra layer of security as the external device 320 may not need to store or otherwise handle decrypted information. As such, the external device 320 may be lost without losing decrypted information. The controller 300 comprises a computing unit 306 configured for deriving a combined key by combining the first key and the second key with a third key held by the controller 300, for example in memory 307 of the controller. The combined key may be used fordecrypting, by the computing unit 306, encrypted data transmitted by a wireless transmission WL1 from the external device 320 to the controller 300. Optionally, the decrypted data may be used for altering, by the computing unit 306 an operation of the implantable medical device 10. The altering an operation of the implantable medical device may comprise controlling or switching an active unit 302 of themedical device. In some embodiments, the method further comprises at least one of the steps of, based on the decrypted data, updating a control program running in the implant, and operating the implantable medical device 10 using operation instructions in the decrypted data. In some embodiments, further keys are necessary to derive a combined key for decrypting the encrypted data received at thecontroller 300. In these embodiments, the first and second key are received as described above. Further, the method comprises receiving, at the implanted medical device, a fourth key from a third external device, the third external device being separate from the external device, deriving a combined key by combining the first, second and fourth key with the third key held by the controller 300, and decrypting the encrypted data, in the controller 300, using the combined key. Optionally, the decrypted data may be used for altering, by the computing unit 306, an operation of the implanted medical device as described above. In some embodiments, the fourth key is routed through the external device from the third external device. In some embodiments, further security measures are needed before using the decrypted data for altering, by the computing unit306, an operation of the implantable medical device. For example, an electrical connection C1 between the implantable medical device and the external device 320, using the body as a conductor, may be used for further verification of validity of the decrypted data. The electrical connection C1 may be achieved by placing a conductive member 201, configured to be in connection with the external device, in electrical connection with a skin of the patient for conductive communication C1 with the implantable medical device. The communication may thus be provided with an extra layer of security in addition to the encryption by being electrically confined to the conducting path e.g. external device 320, conductive member 201, conductive connection C1, controller 300, meaning the communication will be excessively difficult to be intercepted by a third party not in physical contact with, or at least proximal to, the patient. Accordingly, in some embodiments, the method comprising confirming the electrical connection between the controller 300 and the external device 320, and as a result of the confirmation, altering an operation of the implantable medical device based on the decrypteddata. The confirmation and authentication of the electrical connection may be performed as described herein under the general features section. In these cases, the implantable medical device and/or external device(s) 320 comprises the necessary features and functionality (described in the respective sections of this document) for performing such authentication. By authenticating according to these aspects, security of the authentication may be increased as it may require a malicious third party to know or gain access to either the transient physiological parameter of the patient or detect randomized sensations generated at or within the patient. In some embodiments, the confirmation of the electrical connection comprises: measuring a parameter of the patient, by e.g. a sensor of the implantable medical device 10, measuring the parameter of the patient, by the external device 320, comparing the parameter measured by the implantable medical device to the parameter measured by the external device 320, and authenticating the connection based on the comparison. As mentioned above, as a result of the confirmation, an operation of the implantable medical device may be altered based on the decrypted data. Further methods for encrypted communication between an external device 320 and an implantable medical device 10 are provided. These methods comprise: receiving, at the external device 320 by a wireless transceiver 328, a first key, the first key being generated by a second external device 330, separate from the external device 320 or by another external device being a generator of the second key on behalf of the second external device 320, the first key being received from anyone of the second external device 330 and the generator of the second key, receiving, at the external device 320 by the wireless transceiver 328, a second key from the controller 300, deriving a combined key, by a computing unit 326 of the external device 320, by combining the first key and the second key with a third key held by the external device 320 (e.g. in memory 327), transmitting encrypted data from the implant to the external device and receiving the encrypted data at the external device by the wireless transceiver 328, and decrypting, by the computing unit 326, the encrypted data, in the external device 320, using the combined key. As described above, further keys may be necessary to decrypt the data. Consequently, the wireless transceiver 328 is configured for: receiving a fourth key from a third external device, wherein the computing unit 326 is configured for: deriving a combined key by combining the first, second and fourth key with the third key held by the external device, and decrypting the encrypted data using the combined key. In some embodiments, the communication between the controller 300 and the external device 320 needs to be confirmed (authenticated) before decrypting the data. In these cases, the implantable medical device and/or external device(s) comprises the necessary features and functionality (described in the respective sections of this document) for performing such authentication. These embodiments further increase the security in the communication. In these embodiments the computing unit 326 is configured to confirm the communication between the implantable medical device and the external device, wherein the confirmation comprises: measuring a parameter of the patient, by the external device 320, receiving a measured parameter of the patient, from the implantable medical device 10, comparing the parameter measured by the implantable medical device 320 to the parameter measured by the external device 320, performing confirmation of the connection based on the comparison, and as a result of the confirmation, decrypting the encrypted data, in the external device, using the combined key. One or more of the first, second and third key may comprise a biometric key. The keys described in this section may in some embodiments be generated based on data sensed by sensors, e.g. using thesensed data as seed for the generated keys. A seed is an initial value that is fed into a pseudo random number generator to start the process of random number generation. The seed may thus be made hard to predict without access or knowledge of the physiological parameters of the patient which it is based on, providing an extra level of security to the generated keys. Further, increased security for communication between an external device(s) 320, 330 and an implantable medical device isprovided, described with reference to Figs.52a – 52c. The system being configured for enabling communication between an external device 320 and the controller 300 implanted in a patient. The system comprises a conductive member 321 configured to be in connection (electrical/conductive or wireless or otherwise) with the external device, the conductive member 321 being configured to be placed in electrical connection with a skin of the patient for conductive communication C1 with the implantable medical device 10. By using a conductive member 321 as defined herein, an increased security for communication between the external device and the implantable medical device may be achieved. For example, when a sensitive update of a control program of the controller 300 is to be made, or if sensitive data regarding physical parameters of the patient is to be sent to the external device 320 (or otherwise), the conductive member 321 may ensure that the patient is aware of such communication and actively participate in validating that the communication may take place. The conductive member may, by being placed in connection with the skin of the patient, open the conductive communication channel C1 between the external device and the controller to be used for data transmission. Electrical or conductive communication, such as this or as described under the other embodiments, may be very hard to detect remotely, or at least relatively so, in relation to wireless communications such as radio transmissions. Direct electrical communication may further safeguard the connection between the implantable medical device 10 and the external device 320 from electromagnetic jamming i.e. high-power transmissions other a broad range of radio frequencies aimed at drowning other communications within the frequency range. Electrical or conductive communication will be excessively difficult to be intercepted by a third party not in physical contact with, or at least proximal to, the patient, providing an extra level of security to the communication. In some embodiments, the conductive member comprises a conductive interface for connecting the conductive member to the external device. In some embodiments, the conductive member 201 is a device which is plugged into the external device 200, and easily visible and identifiable for simplified usage by the patient. In other embodiments, the conductive member 321 is to a higher degree integrated with theexternal device 320, for example in the form of a case of the external device 320 comprising a capacitive area configured to be in electrical connection with a skin of the patient. In one example, the case is a mobile phone case (smartphone case) for a mobile phone, but the case may in other embodiments be a case for a personal computer, or a body worn camera, or any other suitable type of external device as described herein. The case may for example be connected to the phone using a wire from the case and connected to the headphone port or charging port of the mobile phone. The conductive communication C1 may be used both for communication between the controller 300 and the external device 320 in any or both directions. Consequently, according to some embodiments, the external device 320 is configured to transmit a conductive communication (conductive data) to the controller 300 via the conductive member 321. According to some embodiments, the controller 300 is configured to transmit a conductive communication to the external device 320. These embodiments start by placing the conductive member 321, configured to be in connection with the external device 320, in electrical connection with a skin of the patient for conductive communication C1 with the controller 300. The conductive communication between the external device 320 and the controller 300 may follow an electrically/conductively confined path comprising e.g. the external device 320, conductive member 321, conductive connection C1, controller 300. For the embodiments when the external device 320 transmits data to the controller, the communication may comprise transmitting a conductive communication to the controller 300 by the external device 320. The transmitted data may comprise instructions for operating the implantable medical device 10. Consequently, some embodiments comprise operating the implantable medical device 10 using operation instructions, by an internal computing unit 306 of the controller 300, wherein the conductive communication C1 comprises instructions for operating the implantable medical device 10. The operation instruction may for example involve adjusting or setting up (e.g. properties or functionality of) the active unit 302 of the implantable medical device 10. The transmitted data may comprise instructions for updating a control program 310 stored in memory 307 of the controller 300. Consequently, some embodiments comprise updating the control program 310 running in the controller 300, by the internal computing unit 306 of the implantable medical device, wherein the conductive communication comprises instructions for updating the control program 310. For the embodiments when the controller 300 transmits data to the external device 320, the communication may comprise transmitting conductive communication C1 to the external device 320 by the controller 300. The conductive communication may comprisefeedback parameters. Feedback parameters could include battery status, energy level at the controller, the fluid level of the hydraulic restriction device, number of operations that the restriction device has performed, properties, version number etc. relating to functionality of the implantable medical device 10. In other embodiments, the conductive communication C1 comprises data pertaining to least one physiological parameter of the patient, such as blood pressure etc. The physiological parameter(s) may be stored in memory 307 of thecontroller 300 or sensed in prior (in real time or with delay) to transmitting the conductive communication C1. Consequently, in some embodiments, the implantable medical device 10 comprises a sensor 150 for sensing at least one physiological parameter of the patient, wherein the conductive communication comprises said at least one physiological parameter of the patient. To further increase security of the communication between the controller 300 and the external device 320, different types of authentication, verification and/or encryption may be employed. In some embodiments, the external device 320 comprises a verificationunit 340. The verification unit 340 may be any type of unit suitable for verification of a user, i.e. configured to receive authentication input from a user, for authenticating the conductive communication between the implantable medical device and the external device. In some embodiments, the verification unit and the external device comprises means for collecting authentication input from the user (which may or may not be the patient). Such means may comprise a fingerprint reader, a retina scanner, a camera, a GUI for inputting a code, amicrophone, device configured to draw blood, etc. The authentication input may thus comprise a code or any be based on a biometric technique selected from the list of: a fingerprint, a palm vein structure, image recognition, face recognition, iris recognition, a retinal scan, a hand geometry, and genome comparison. The means for collecting the authentication input may alternatively be part of the conductive member which comprise any of the above examples of functionality, such as a fingerprint reader or other type of biometric reader. In some embodiments, the security may thus be increased by receiving an authentication input from a user by the verification unit 340 of the external device 320, and authenticating the conductive communication between the controller 300 and the external device using the authentication input. Upon a positive authentication, the conductive communication channel C1 may be employed for comprising transmitting a conductive communication to the controller 300 by external device 320 and/or transmitting a conductive communication tothe external device 320 by the controller 300. In other embodiments, a positive authentication is needed prior to operating the implantablemedical device 10 based on received conductive communication, and/or updating a control program running in the controller 300 as described above. Figs. 52a – 52c further shows an implantable medical device 10 implanted in a patient and being connected to a sensation generator 381. The sensation generator 381 may be configured to generate a sensation. The sensation generator 381 may be contained within the implantable medical device 10 or be a separate unit. The sensation generator 381 may be implanted. The sensation generator 381 may also be located so that it is not implanted as such but still is in connection with a patient so that only the patient may experience sensations generated. The controller 300 is configured for storing authentication data, related to the sensation generated by the sensation generator 381. The controller 300 is further configured for receiving input authentication data from the external device 320. Authentication data related to the sensation generated may by stored by a memory 307 of the controller 300. The authentication data may include information about the generated sensation such that it may be analyzed, e.g. compared, to input authentication data to authenticate the connection,communication or device. Input authentication data relates to information generated by a patient input to the external device 320. The input authentication data may be the actual patient input or an encoded version of the patient input, encoded by the external device 320. Authentication data and input authentication data may comprise a number of sensations or sensation components. The authentication data may comprise a timestamp. The input authentication data may comprise a timestamp of the input from the patient. The timestamps may be a time of the event such as the generation of a sensation by the sensation generator 381 or the creation of input authentication data by the patient. The timestamps may be encoded. The timestamps may feature arbitrary time units, i.e. not the actual time. Timestamps may be provided by an internal clock 360 of the controller 300 and an external clock 362 of the external device 320. The clocks 360, 362 may be synchronized with each other. The clocks 360, 362 may be synchronized by using a conductive connectionC1 or a wireless connection WL1 for communicating synchronization data from the external device 320, and its respective clock 362, to thecontroller 300, and its respective clock 360, and vice versa. Synchronization of the clocks 360, 362 may be performed continuously and may not be reliant on secure communication. Authentication of the connection may comprise calculating a time difference between the timestamp of the sensation and the timestamp of the input from the patient, and upon determining that the time difference is less than a threshold, authenticating theconnection. An example of a threshold may be 1s. The analysis may also comprise a low threshold as to filter away input from the patient that is faster than normal human response times. The low threshold may e.g. be 50ms. Authentication data may comprise a number of times that the sensation is generated by the sensation generator, and wherein the input authentication data comprises an input from the patient relating to a number of times the patient detected the sensation. Authenticating the connection may then comprise: upon determining that the number of times that the authentication data and the input authentication data are equal, authenticating the connection. A method of authenticating the connection between an implantable medical device 10 implanted in a patient, and an external device 320 according includes the following steps. Generating, by a sensation generator 381, a sensation detectable by a sense of the patient. The sensation may comprise a plurality of sensation components. The sensation or sensation components may comprise a vibration (e.g. a fixed frequency mechanical vibration), a sound (e.g. a superposition of fixed frequency mechanical vibrations), a photonic signal (e.g. a non-visible light pulse such as an infra-red pulse), a light signal (e.g. a visual light pulse), an electric signal (e.g. an electrical current pulse) or a heat signal (e.g. a thermalpulse). The sensation generator may be implanted, configured to be worn in contact with the skin of the patient or capable of creating sensation without being in physical contact with the patient, such as a beeping alarm. Sensations may be configured to be consistently felt by a sense of the patient while not risking harm to or affecting internal biological processes of the patient. The sensation generator 381, may be contained within the controller 300 or be a separate entity connected to the controller 300. The sensation may be generated by a motor (denoted as M in several embodiments shown herein) of the implantable medical device 10, wherein the motor being the sensation generator 381. The sensation may be a vibration, or a sound created by running the motor. The sensation generator 381 may be located close to a skin of the patient and thus also the sensory receptors of the skin. Thereby the strength of some signal types may be reduced. Storing, by the controller 300, authentication data, related to the generated sensation. Providing, by the patient input to the external device, resulting in input authentication data. Providing the input may e.g. comprise an engaging an electrical switch, using a biometric input sensor or entry into digital interface running on the external device 320 to name just a few examples. Transmitting the input authentication data from the external device to the controller 300. If the step was performed, the analysis may be performed by the controller 300. Transmitting the authentication data from the implantable medical device 10 to the external device 320. If the step wasperformed, the analysis may be performed by the external device 320. The wireless connection WL1 or the conductive connection C1 may be used to transmit the authentication data or the input authentication data. Authenticating the connection based on an analysis of the input authentication data and the authentication data e.g. by comparing a number of sensations generated and experienced or comparing timestamps of the authentication data and the input authentication data. Ifstep was performed, the analysis may be performed by the implantable medical device 10. Communicating further data between the controller 300 and the external device 320 following positive authentication. The wireless connection WL1 or the conductive connection C1 may be used to communicate the further data. The further data may comprise data for updating a control program 310 running in the controller 300 or operation instructions for operating the implantable medical device 10. The further data may also comprise data sensed by a sensor 150 connected to the controller 300. The controller may comprise at least one unit having a sleep mode and an active mode, and the unit consumes less energy in the sleep mode than in the active mode. The unit is configured to switch from the sleep mode to the active mode on the basis of at least one signal from the sensor. The unit could for examplebe a DSP (Digital Signal Processor), another type of processor or a wake-up circuit of the controller, which in turn activates the functions of the controller. The unit may be configured to switch from the sleep mode to the active mode on the basis of a signal from the sensor related to the patient swallowing a number of times and/or on the basis of a signal from the sensor related to the patient swallowing a number of times during a time period. The number of times the patient swallows and the time could be counted/measured and compared with a pre-set or moving threshold value. The controller could further comprise at least one filtering unit configured to filter signals related to at least one of: speech, the swallowing of saliva and chewing. The filter could be a digital filter implemented as hardware or software in the controller and could have the filter characteristics of a high, low or bandpass filter. If the analysis was performed by the controller 300, the external device 320 may continuously request or receive, information of an authentication status of the connection between the controller 300 and the external device 320, and upon determining, at the external device 320, that the connection is authenticated, transmitting further data from the external device 320 to the controller 300.If the analysis was performed by the external device 320, the controller 300 may continuously request or receive, information of an authentication status of the connection between the controller 300 and the external device 320, and upon determining, at the controller 300, that the connection is authenticated, transmitting further data from the controller 300 to the external device 320. A main advantage of authenticating a connection according to this method is that only the patient may be able to experience thesensation. Thus, only the patient may be able to authenticate the connection by providing authentication input corresponding to the sensation generation. The sensation generator 381, sensation, sensation components, authentication data, input authentication data, and further data may be further described herein. In these cases, the implantable medical device 10 and/or external device(s) comprises the necessary features and functionality (described in the respective sections of this document). Further information and definitions can be found in this document in conjunction with the other aspects. The method may further comprise transmitting further data between the controller 300 and the external device, wherein the further data is used or acted upon, only after authentication of the connection is performed. The analysis or step of analyzing may be understood as a comparison or a step of comparing. In one method, increased security for communication between an external device(s) and an implanted controller is provided. Figs.52a – 52c show an implantable medical device 10 comprising a controller 300 and an external device 320 which may form a system. The controller 300 comprises a transceiver 308, 303 configured to establish a connection with an external device 320, i.e. with a corresponding transceiver 328, 323. The connection may be an electrical connection C1 using the transceivers 303, 323, or a wireless connection WL1 using the transceivers 308, 328. The controller 300 further comprises a computing unit 306 configured to verify the authenticity of instructions received at the transceiver 308, 303 from the external device 320. In this aspect, the concept of using previously transmitted instructions for verifying a currently transmitted instructions are employed. Consequently, the transmitting node (in this case the external device) need to be aware of previously instructions transmitted to the implantable medical device, which reduces the risk of a malicious device instructing the implant without having the authority to do so. In an embodiment, the computing unit 306 is configured to verify the authenticity of instructions received at the transceiver 308, 303 by extracting a previously transmitted set of instructions from a first combined set of instructions received by the transceiver. The external device 320 may thus comprise an external device comprising a computing unit 326 configured for: combining a first set of instructions with a previously transmitted set of instructions, forming a combined set of instructions, and transmitting the combined set of instructions to the implantable medical device. The previously transmitted set of instructions, or a representation thereof, may be stored in memory 327 of the external device 320. The combined set of instructions may have a data format which facilitates such extraction, for example including metadata identifying data relating to the previously transmitted set of instructions in the combined set of instructions. In some embodiments, the combined set of instructions comprises the first set of instructions and a cryptographic hash of the previously transmitted set of instructions. Consequently, the method comprises combining, at the external device, a first set of instructions with a previously transmittedset of instructions, forming a first combined set of instructions. A cryptographic hash function is a special class of hash function that has certain properties which make it suitable for use in cryptography. It is a mathematical algorithm that maps data of arbitrary size to a bit string of a fixed size (a hash) and is designed to be a one-way function, that is, a function which is infeasible to invert. Examples include MD5, SHA1, SHA 256, etc. Increased security is thus achieved. The first combined set of instructions is then transmitted to the implanted controller 300, where it is received by e.g. the transceiver 303, 308. The first combined set of instructions may be transmitted to the implantable medical device using a proprietary network protocol. The first combined set of instructions may be transmitted to the controller 300 using a standard network protocol. In these cases, the controller 300 and/or external device(s) comprises the necessary features and functionality (described in the respectivesections of this document) for performing transmission of data. By using different communication protocols, at the external device 320, for communication with the controller 300 and with a second external device 330, an extra layer of security is added as the communication between controller 300 and the external device 320 may be made less directly accessible to remote third parties. At the controller 300, the computing unit 306 verifies the authenticity of the received first combined set of instructions, by: extracting the previously transmitted set of instructions from the first combined set of instructions, and comparing the extracted previously transmitted set of instructions with previously received instructions stored in the implantable medical device. Upon determining that the extracted previously transmitted set of instructions equals the previously received instructions storedin the controller 300, the authenticity of the received first combined set of instructions may be determined as valid, and consequently, the first set of instructions may be safely run at the controller 300, and the first combined set of instructions may be stored in memory 307 of the controller 300, to be used for verifying a subsequent received set of instructions. In some embodiments, upon determining by the internal computing unit 306 that the extracted previously transmitted set of instructions differs from the previously received instructions stored in the controller 300, feedback related to an unauthorized attempt to instruct the implantable medical device 10 may be provided. For example, the transceiver 308, 303 may send out a distress signal to e.g. the external device 320 or to any other connected devices. The controller 300 may otherwise inform the patient that something is wrong by e.g.vibration or audio. The implantable medical device 10 may be run in safe mode, using a preconfigured control program which is stored in memory 307 of the controller 300 and specifically set up for these situations, e.g. by requiring specific encoding to instruct the implantable medical device 10, or only allow a predetermined device (e.g. provided by the manufacturer) to instruct the implantable medical device 10. In some embodiments, when receiving such feedback at the external device 320, the external device 320 retransmits the first combined set ofinstructions again, since the unauthorized attempt may in reality be an error in transmission (where bits of the combined set of instructionsare lost in transmission), and where the attempt to instruct the implantable medical device 10 is indeed authorized. The step of comparing the extracted previously transmitted set of instructions with previously received instructions stored in thecontroller 300 may be done in different ways. For example, the step of comparing the extracted previously transmitted set of instructions with previously received instructions stored in the controller 300 comprises calculating a difference between the extracted previously transmitted set of instructions with previously received instructions stored in the controller 300, and comparing the difference with a threshold value, wherein the extracted previously transmitted set of instructions is determined to equal the previously receivedinstructions stored in the controller 300 in the case of the difference value not exceeding the threshold value. This embodiment may be used when received instructions is stored in clear text, or a representation thereof, in the controller 300, and where the combined set of instructions, transmitted from the external device also includes such a representation of the previously transmitted instructions. This embodiment may be robust against error in transmission where bits of information are lost or otherwise scrambled. In other embodiments, the combined set of instructions comprises the first set of instructions and a cryptographic hash of the previously transmitted set of instructions, wherein the method further comprises, at the controller 300, calculating a cryptographic hash of the previously received instructions stored in the controller 300 and comparing the calculated cryptographic hash to the cryptographic hash included in the first combined set of instructions. This embodiment provides increased security since the cryptographic hash is difficult to decode or forge. The above way of verifying the authenticity of received instructions at the controller 300 may be iteratively employed for further sets if instructions. To further increase security, the transmission of a first set of instructions, to be stored at the controller 300 for verifying subsequent sets of combined instructions, where each set of received combined instructions will comprise data which in some form will represent, or be based on, the first set of instruction, may be performed. In one example, the external device 320 may be adapted to communicate with the controller 300 using two separate communication methods. A communication range of a first communication method WL1 may be less than a communication range of a second communication method WL2. A method may comprise the steps of: sending a first part of a key from the external device 320 to thecontroller 300, using the first communication method WL1 and sending a second part of the key from the external device 320 to the controller 300, using the second communication method WL2. The method may further comprise deriving, in the controller 300, a combined key from the first part of the key and the second part of the key and decrypting the encrypted data, in the controller 300, using the combined key. The encrypted data may also be sent from the external device 320 to the controller 300 using the second communicationmethod WL2. The method may then further comprise confirming an electrical connection C1 between the controller 300 and the external device 320 and as a result of the confirmation, decrypting the encrypted data in the controller 300 and using the decrypted data for instructing the controller 300. The method may also comprise placing a conductive member 321, configured to be in connection with the external device 320, in electrical connection with a skin of the patient for conductive communication with the controller 300. By means of the electrical connection an extra layer of security is added as a potential hacker would have to be in contact with the patient to access or affect the operation of the implantable medical device 10. Using a plurality of communication methods, may increase the security of the authentication and the communication with the implantable medical device 10 as more than one channel for communication may need to be hacked or hijacked by an unauthorized entity to gain access to the implantable medical device 10 or the communication. The electrical connection C1 the conductive member 321 and conductive communication may be further described herein in the general definitions section. In these cases, the controller 300 and/or external device 320 comprise the necessary features and functionality (described in the respective sections of this document). It should also be noted that any one of the first and second communication methods WL1, WL2 may be needed to be confirmed in order to decrypt the encrypted data in the controller 300 and using the decrypted data for instructing the implantable medical device 10. The method may further comprise the step of wirelessly receiving, at the controller 300, a third part of the key from the second external device 330. In this case, the combined key may be derived from the first part of the key, the second part of the key and the third part of the key. The first communication method WL1 may be a wireless form of communication. The first communication method WL1 may preferably be a form of electromagnetic or radio-based communication however, other forms of communication are not excluded. The first communication method WL1 may comprise or be related to the items of the following list: Radio-frequency identification (RFID), Bluetooth, Bluetooth 5, Bluetooth Low Energy (BLE), Near Field Communication (NFC), NFC-V, Infrared (IR) based communication, Ultrasound based communication. RFID communication may enable the use of a passive receiver circuit such as those in a RFID access/key or payment card. IR based communication may comprise fiber optical communication and IR diodes. IR diodes may alternatively be used directly, without a fiber, such as in television remote control devices. Ultrasound based communication may be based on the non-invasive, ultrasound imaging found in use for medical purposes such as monitoring the development of mammal fetuses. The first communication method WL1 may use a specific frequency band. The frequency band of the first communication method WL1 may have a center frequency of 13.56 MHz or 27.12 MHz. These bands may be referred to as industrial, scientific and medical (ISM) radio bands. Other ISM bands not mentioned here may also be utilized for the communication methods WL1, WL2. A bandwidth of the 13.56 MHz centered band may be 14 kHz and a bandwidth of the 27.12 MHz centered band may be 326 kHz. The communication range of the first communication method WL1 may be less than 10 meters, preferably less than 2 meters, more preferably less than 1 meter and most preferably less than 20 centimeters. The communication range of the first communication method WL1 may be limited by adjusting a frequency and/or a phase of the communication. Different frequencies may have different rates of attenuation. By implementing a short communication range of the first communication method, security may be increased since it may be ensured or made probable that the external device is under control of the patient (holding the external device close to the implant) The communication range of the first communication method WL1 should be evaluated by assuming that a patient’s body, tissue, and bones present the propagation medium. Such a propagation medium may present different attenuation rates as compared to a free space of an air-filled atmosphere or a vacuum. By restricting the communication range, it may be established that the external device communicating with the implanted controller 300 is in fact on, or at least proximal to, the patient. This may add extra security to the communication. The second communication method WL2 may be a wireless form of communication. The second communication method WL2 may preferably be a form of electromagnetic or radio-based communication. The second communication method WL2 may be based ontelecommunication methods. The second communication method WL2 may comprise or be related to the items of the following list: Wireless Local Area Network (WLAN), Bluetooth, Bluetooth 5, BLE, GSM or 2G (2nd generation cellular technology), 3G, 4G, 5G. The second communication method WL2 may utilize the ISM bands as mentioned in the above for the first communication method WL1. A communication range of the second communication method WL2 may be longer than the communication range of the first communication method WL1. The communication range of the second communication method WL2 may preferably be longer than 10 meters, more preferably longer than 50 meters, and most preferably longer than 100 meters. Encrypted data may comprise instructions for updating a control program 310 running in the implantable medical device 10. Encrypted data may further comprise instructions for operating the implantable medical device 10. In one embodiment, the implantable medical device 10 may transmit data to an external device 320 which may add an additionallayer of encryption and transmit the data to a second external device 330, described with reference to figs. 52a – 52c. By having the external device add an additional layer of encryption, less computing resources may be needed in the implanted controller 300, as the controller 300 may transmit unencrypted data or data encrypted using a less secure or less computing resource requiring encryption. In this way, data can still be relatively securely transmitted to a third device. The transmission of data can be performed using any of the method described herein in addition to the method or in the system described below. Thus, in an embodiment, a system is provided. The system comprises an implantable medical device 10 comprising a controller 300 configured to transmit data from the body of the patient to an external device 320, and an encryption unit 382 for encrypting the data to be transmitted. The system further comprises an external device 320 configured to receive the data transmitted by the controller 300, encrypt the received data using a first key and transmit the encrypted received data to a third external device 330. The encryption can be performed using any of the keys described above or below. In some embodiments, the external device 320 is configured to decrypt the data received from the controller 300 before encrypting and transmitting the data. Alternatively, the external device 320 may encrypt and transmit the data received from the controller 300 without decrypting it first. In one example, the encryption unit 382 is configured to encrypt the data to be transmitted using a second key. The first key or the second key may, for example, information specific to the implantable medical device 10, a secret key associated with the external device320, an identifier of the implantable medical device 10 or an identifier of the controller 300. The second key could be a key transmitted by the external device 320 to the controller 300. In some examples, the second key is a combined key comprising a third key received by the controller 300 from the external device 320. The first key may be a combined key comprising a fourth key, wherein the fourth key is received by the external device 320 from a fourth device. The fourth device may be a verification unit, either comprised in the external device, or external to the external device and connected to it. The verification unit may have a sensor 350 for verification, such as a fingerprint sensor. More details in regard to this will be described below. Alternatively, the verification unit may be a generator, as described above. The system may be configured to perform a method for transmitting data using a sensed parameter. The method may comprise transmitting a parameter measured by the external device 320 from the external device 320 to the controller 300. In this case, the comparison of the parameter of the patient measured by the external device 320 and the parameter of the patient measured by the controller 300 may be performed by the controller 300. The implantable medical device 10 may comprise a first sensor 150 for measuringthe parameter of the patient at the implantable medical device 10. The external device 320 may comprise an external sensor 350 for measuring the parameter of the patient at the external device 320. Authentication of the connection between the controller 300 and the external device 320 may be performed automatically without input, authentication, or verification from a user or patient. This is because the comparison of parameters measured internally and externally, by the internal and external sensors 351, 350 respectively may be enough to authenticate the connection. This may typically be the case when the parameter of the patient is related to an automatically occurring physiological function of the patient such as e.g. a pulse of the patient. Certain types of authentication may however require actions from the patient, e.g. having the patient perform specific movements. In the embodiments described herein, the controller 300 may comprise or be connected to a sensation generator 381 as described above. In response to an event in the implantable medical device, such as a reset, a restart, receipt of new instructions, receipt of a new configuration or update, installation or activation of new instructions or configuration or update, the controller 300 may be configured to cause the sensation generator 381 to generate a sensation detectable by the patient in which the implantable medical device10 is implanted. In some examples, the user may after the sensation verify an action, for example via a user interface of an external device 320. The implantable medical device 10 may further implement a method for improving the security of the data transmitted from the controller 300. The method, for encrypted communication between a controller 300, when implanted in a patient’s body, and an external device 320, comprises encoding or encrypting, by the controller 300 or a processor 306 comprised in or connected to the controller 300, data relating to the implantable medical device 10 or the operation thereof; transmitting, by the controller 300, the data; receiving, by asecond communication unit comprised the external device 320, the data; encrypting, by the external device 320, the data using an encryption key to obtain encrypted data; and transmitting the encrypted data to a third external device 330. In this way, the external device 320 may add or exchange the encryption, or add an extra layer of encryption, to the data transmitted by the controller 300. When thecontroller 300 encodes the data to be transmitted it may be configured to not encrypt the data before transmitting, or only using a light- weight encryption, thus not needing as much processing power as if the controller were to fully encrypt the data before the transmission. The encrypting, by the controller 300, may comprise encrypting the data using a second key. The encryption using the second key may be a more light-weight encryption than the encryption performed by the external device using the second key, i.e. an encryption that does not require as much computing resources as the encryption performed by the external device 320. The first or the second key may comprise a private key exchanged as described above with reference to encryption and authentication, or the first or the second key may comprise an information specific to the implantable medical device 10, a secret key associated with the external device, an identifier of the implantable medical device 10 or an identifier of the controller 300. They may be combined keys as described in this description, and the content of the keys, any combination of keys, and the exchange of a key or keys is described in the encryption and/or authentication section. In an embodiment, the implantable medical device 10 comprises at least one sensor for sensing at least one physiologicalparameter of the patient or a functional parameter of the implantable medical device 10, now described with reference to figs. 52a – 52c. The sensor 351 may, for example, be a pressure sensor, an electrical sensor, a clock, a temperature sensor, a motion sensor, an optical sensor, an acoustic sensor, an ultrasonic sensor. The sensor 351 is configured to periodically sense the parameter and the controller 300 is configured to, in response to the sensed parameter being above a predetermined threshold, wirelessly broadcast information relating to the sensed parameter. The controller 300 may be configured to broadcast the information using a short to mid-range transmitting protocol, such as a Radio Frequency type protocol, a RFID type protocol, a WLAN type protocol, a Bluetooth type protocol, a BLE type protocol, an NFC type protocol, a 3G/4G/5G type protocol, or a GSM type protocol. The controller of the implant may be connected to the sensor 351 and be configured to anonymize the information before it is transmitted. The transmission of data may also be called broadcasting of data. In addition to or as an alternative to transmitting the data when the sensed parameter is above a predetermined threshold, the controller 300 may be configured to broadcast the information periodically. The controller 300 may be configured to broadcast the information in response to a second parameter being above a predetermined threshold. The second parameter may, for example, be related to the controller 300 itself, such as a free memory or free storage space parameter, or a battery status parameter. When the implantable medical device 10 comprises an implantable energy storage unit and an energy storage unit indicator, the energy storage unit indicator isconfigured to indicate a functional status of the implantable energy storage unit and the indication may be comprised in the transmitted data. The functional status may indicate at least one of charge level and temperature of the implantable energy storage unit. In some embodiments the external device 320 is configured to receive the broadcasted information, encrypt the receivedinformation using an encryption key and transmit the encrypted received information. In this way, the external device 320 may add anadditional layer of encryption or exchange the encryption performed by the controller In an embodiment, the controller 300 is configured to transmit the data using the body of the patient as a conductor C1, and the external device 320 is configured to receive the data via the body. Alternatively, or in combination, the controller 300 of the implant is configured to transmit the data wirelessly to the external device WL2. Thus, the controller 300 may implement a method for transmitting data from the controller 300 comprising a processor 306, comprising: obtaining sensor measurement data via a sensor 150 connected to or comprised in the controller 300, the sensor measurement relating to at least one physiological parameter of the patient or a functional parameter of the implantable medical device 10, and transmitting by the controller 300 the sensor measurement data in response to the sensor measurement being above apredetermined threshold, wherein the sensor 150 is configured to periodically sense the parameter. The method may further comprise broadcasting the sensor measurement data, to be received by an external device 320. The transmitting or broadcasting may comprise using at least one of a Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, or a GSM type protocol. The method may further comprise, at the processor 306, anonymizing, by the processor, the sensor measurement data before it is transmitted, or encrypting the sensor measurement data, using an encryptor 382 comprised in the processing unit 306, before it is transmitted. The transmitting of the data may further comprise to encode the data before the transmitting. The type of encoding may be dependent on the communication channel or the protocol used for the transmission. The transmitting may be performed periodically, or in response to a signal received by the processor, for example, by an internal part of the implantable medical device 10 such as a sensor 150, or by an external device 320. The parameter may, for example, be at least one of a functional parameter of the implantable medical device 10 (such as a battery parameter, a free memory parameter, a temperature, a pressure, an error count, a status of any of the control programs, or any other functional parameter mentioned in this description) or a parameter relating to the patient (such as a temperature, a blood pressure, or any other parameter mentioned in this description). In one example, the implantable medical device 10 comprises an implantable energy storage unit 40 and an energy storage unit indicator 304c, and the energy storage unit indicator 304c is configured to indicate a functional status of the implantable energy storage unit 40, and the sensor measurement comprises data related to the energy storage unit indicator. In one example, the transmitting comprises transmitting the sensor measurement to an internal processor 306 configured to cause a sensation generator 381 to cause a sensation detectable by the patient in which the implantable medical device 100 is implanted. The method may be implemented in a system comprising the implantable medical device 100 and an external device 320, and further comprise receiving the sensor measurement data at the external device 320, and, at the external device 320, encrypting the sensor measurement data using a key to obtain encrypted data, and, transmitting the encrypted data. The transmitting may, for example, be performed wirelessly WL3 or conductively C1. In the examples or embodiments transmitting data from or to the implantable medical device 10, the following method may beimplanted in order to verify the integrity of the data, described with reference to figs. 52a – 52b. By verifying the integrity of the data, anexternal device 320 or a processor 306 comprised in the controller 300 may verify that the data has not been corrupted or tampered with during the transmission. In some examples, data integrity for data communicated between a controller 300 and an external device 320 or between an external device 320 and the controller 300 may be performed using a cyclic redundancy check. Thus, in a first example, a method for evaluating a parameter of a controller 300 implanted in a patient is described. The controller 300 comprises a processor 306 and a sensor 150 for measuring the parameter. The method comprises measuring, using the sensor 150, the functional parameter to obtain measurement data; establishing a connection between the internal controller 300 and an external device 320 configured to receive data from the implant; determining, by the processor 306, a cryptographic hash or a metadata relating to the measurement data and adapted to be used by the external device 320 to verify the integrity of the received data; transmitting the cryptographic hash or metadata; and transmitting, from the controller 300, the measurement data. The parameter may, for example, be a parameter of the controller 300, such as a temperature, a pressure, a battery statusindicator, a time period length, a pressure at a restriction device, a pressure at a sphincter, or a physiological parameter of the patient, such as a pulse, a blood pressure, or a temperature. In some examples, multiple parameters may be used. The method may further comprise evaluating the measurement data relating to the functional parameter. By evaluating it may be meant to determine if the parameter is exceeding or less than a predetermined value, to extract another parameter from the measurementdata, compare the another parameter to a predetermined value, or displaying the another parameter to a user. For example, the method may further comprise, at the external device 320, to determining, based on the evaluating, that the implantable medical device 10 is functioning correctly, or determining based on the evaluating that the implantable medical device 10 is not functioning correctly. If it is determined that the implantable medical device 10 is not functioning correctly, the method may further comprise sending, from the external device 320, a corrective command to the controller 300, receiving the corrective command at the controller 300, and by running the corrective command correcting the functioning of the implantable medical device 10 according to the corrective command. The method may further comprise, at the external device 320, receiving the transmitted cryptographic hash or metadata,receiving the measurement data, and verifying the integrity of the measurement data using the cryptographic hash or metadata. The cryptographic hash algorithm be any type of hash algorithm, i.e. an algorithm comprising a one-way function configured to have an input data of any length as input and produce a fixed-length hash value. For example, the cryptographic hash algorithm may be MD5, SHA1, SHA 256, etc. In some examples, the cryptographic hash is a signature obtained by using a private key of the controller 300, and wherein the verifying, by the external device 320, comprises verifying the signature using a public key corresponding to the private key. When using a cryptographic hash, the method may further comprise calculating a second cryptographic hash for the received measurement data using a same cryptographic hash algorithm as the processor, and determining that the measurement data has been correctly received based on that the cryptographic hash and the second cryptographic hash are equal (i.e. have the same value). When using a metadata the verifying the integrity of the data may comprises obtaining a second metadata for the received measurement data relating to the functional parameter, and determining that the data has been correctly received based on that metadata and the second metadata are equal. The metadata may, for example, be a length of the data or a timestamp. In some examples the measurement data is transmitted in a plurality of data packets. In those examples, the cryptographic hash or metadata comprises a plurality of cryptographic hashes or metadata each corresponding to a respective data packet, and the transmitting of each the cryptographic hashes or metadata is performed for each of the corresponding data packets. A similar method may be utilized for communicating instructions from an external device 320 to a controller 300 implanted in a patient. The method comprises establishing a first connection between the external device 320 and the controller 300, establishing a second connection between a second external device 330 and the controller 300, transmitting, from the external device 320, a first set ofinstructions to the controller 300 over the first connection, transmitting, from the second external device 330, a first cryptographic hash or metadata corresponding to the first set of instructions to the controller 300, and, at the controller 300, verifying the integrity of the first set of instructions and the first cryptographic hash or metadata, based on the first cryptographic hash or metadata. The external device 320 may be separate from the second external device 330. The first connections may be established between the controller 300 and a transceiver of the external communication unit 323. In some examples, the communication using the second connection is performed using a different protocol than a protocol used for communication using the first communication channel. In some examples, the first connection is a wireless connection and the second connection is an electrical connection. The second connection may, for example, be an electrical connection using the patient’s body as a conductor (using 321). The protocols and ways of communicating may be any communication protocols described in this description with reference to C1, and WL1-WL4. The establishing of the first and second connections are performed according to the communication protocol used for each of the first and the second connections. When using a cryptographic hash, the verifying the integrity of the first set of instructions may comprise calculating a secondcryptographic hash for the received first set of instructions using a same cryptographic hash algorithm as the processor 306, and determining that the first set of instructions has been correctly received based on that the cryptographic hash and the second cryptographic hash are equal. The cryptographic hash may, for example, be a signature obtained by using a private key of the implantable medical device 10, and wherein the verifying comprises verifying the signature using a public key corresponding to the private key. In some examples, the cryptographic hash is a signature obtained by using a private key of the implantable medical device 10, and wherein the verifying comprises verifying the signature using a public key corresponding to the private key. The private keys and public keys, as well as the exchange or transmittal of keys have been described in this description. Alternatively, other well-known methods can be used for transmitting or exchanging a key or keys between the external device 320 and the controller 300. When using a metadata, and wherein the verifying the integrity of the data may comprise obtaining a second metadata for the received first set of instructions, and determining that the first set of instructions has been correctly received based on that metadata and the second metadata are equal. The metadata may, for example, be any type of data relating to the data to be transmitted, in this example the first set of instructions. For example, the metadata may be a length of the data to be transmitted, a timestamp on which the data was transmitted or retrieved or obtained, a size, a number of packets, or a packet identifier. In some examples, the controller 300 may transmit data to an external device 320 relating to the data information in order to verify that the received data is correct. The method may thus further comprise, transmitting, by the controller 300, information relating to the received first set of instructions, receiving, by the external device 320, the information, and verifying, by the external device 320, that the information corresponds to the first set of instructions sent by the external device 320. The information may, for example, comprise a length of the first set of instructions. The method may further comprise, at the controller 300, verifying the authenticity of the first set of instructions by i. calculatinga second cryptographic hash for the first set of instructions, ii. comparing the second cryptographic hash with the first cryptographic hash,iii. determining that the first set of instructions are authentic based on that the second cryptographic hash is equal to the firstcryptographic hash, and upon verification of the authenticity of the first set of instructions, storing them at the controller In some examples, the first set of instructions comprises a cryptographic hash corresponding to a previous set of instruction, as described in other parts of this description. In some examples, the first set of instructions may comprise a measurement relating to the patient of the body for authentication, as described in other parts of this description. A system and a method for communication of instructions or control signals between an external device 320 and an implantablemedical device 10 will now be described with reference to Figs. 52a – 52c. The system shown in Figs. 52a – 52c comprises an implantable medical device 10, a first external device 320, and a secondexternal device 330. The implantable medical device a controller 300. The controller 300 is adapted to receive an instruction from an external device 320 over the communication channel WL1, C1 and run the instruction to control a function of the medical device 10. The communication channel WL1, C1 may be any type of communication channel, such as a wireless connection WL1 or a conductive connection C1described herein. For example, the wireless connection may comprise at least one of the following protocols: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, a BLE type protocol, an NFC type protocol, a 3G/4G/5G/6G type protocol, a GSM type protocol, and/or Bluetooth 5. The first external device 320 is adapted to receive, such as through a user interface, or determine an instruction to betransmitted to the implantable medical device 10. The determination of the instruction may, for example, be based on received data from the implantable medical device 10, such as measurement data or data relating to a state of the implantable medical device 10, such as a battery status or a free memory status. The first external device 320 may be any type of device capable of transmitting information to the implantable medical device and capable of determining or receiving an instruction to be transmitted to the implantable medical device 10. In a preferred embodiment, the first external device 320 is a hand-held device, such as a smartphone, smartwatch, tablet etc. handled by the patient, having a user interface for receiving an instruction from a user, such as the patient or a caregiver. The first external device 320 is further adapted to transmit the instruction to a second external device 330 via communication channel WL3. The second external device 320 is adapted to receive the instruction, encrypt the instruction using an encryption key, and then transmit the encrypted instruction to the implantable medical device 10. The implantable medical device 10 is configured to receive the instruction at the controller 300. The controller 300 thus comprises a wired transceiver or a wireless transceiver for receiving theinstruction. The implantable medical device 10 is configured to decrypt the received instruction. The decryption may be performed using a decryption key corresponding to the encryption key. The encryption key, the decryption key and methods for encryption/decryption andexchange of keys may be performed as described in the “general definition of features” or as described with reference to Figs. 52a – 52c. Further, there are many known methods for encrypting data which the skilled person would understand to be usable in this example. The second external device 330 may be any computing device capable of receiving, encrypting and transmitting data as described above. For example, the second external device 320 may be a network device, such as a network server, or it may be an encryption device communicatively coupled to the first external device. The instruction may be a single instruction for running a specific function or method in the implantable medical device 10, a value for a parameter of the implantable medical device 10, or a set of sub-steps to be performed by the controller 300 comprised in the implantable medical device 10. In this way, the instruction for controlling a function of the implantable medical device 10 may be received at the first external device 320 and transmitted to the implantable medical device 10 via the second external device 330. By having a second external device 330 encrypting the instruction before transmitting it to the implantable medical device 10, the instruction may be verified by the second external device 330 and the first external device 320 may function so as to relay the instruction. In some alternatives, the second external device330 may transmit the instruction directly to the implantable medical device 10. This may provide an increased security as the instruction sent to the implantable medical device 10 may be verified by the second external device 330, which, for example, may be a proprietary device managed by the medical professional responsible for the implantable medical device 10. Further, by having the second externaldevice 330 verifying and encrypting the instruction, the responsibility authenticity and/or correctness of the instruction may lie with the second external device 330, which may be beneficial for regulatory purposes, as the first external device 320 may not be considered as the instructor of the implantable medical device 10. Further, the second external device 330 may verify that the instruction is correct before encrypting or signing and transmitting it to the implantable medical device 10. The second external device 330 may, for example, verify that the instruction is correct by comparing the instruction with a predetermined set of instructions, and if the instruction is comprised in the predetermined set of instructions determine that the instruction is correct. If the instruction comprises a plurality of sub-steps, the second external device 330 may determine that the instruction is correct if all the sub-steps are comprised in the predetermined set of instructions. If the instruction comprises a value for a parameter of the implantable medical device 10, the second external device 330 may verify that the value is within a predetermined range for the parameter. The second external device 320 may thus comprise a predetermined set of instructions, or a predetermined interval or threshold value for a value of a parameter, stored at an internal or external memory. The second external device 330 may be configured to reject the instruction, i.e. to not encrypt and transmit the instruction to the implantable medical device 10, if the verification of the instruction would fail. For example, the second external device 330 determines that the instruction or any sub-step of the instruction is not comprised in the predetermined set of instructions, or if a value for a parameter is not within a predetermined interval, the second external device 330 may determine that the verification has failed. In some embodiments, the implantable medical device 10 may be configured to verify the instruction. The verification of theinstruction may be performed in the same way as described with reference to Figs. 52a – 52c. If the verification is performed by comparing the instruction or any sub-steps of the instruction with a predetermined set of instructions, the controller 300 may comprise a predetermined set of instructions. The predetermined set of instructions may, for example, be stored in an internal memory of the controller 300. Similarly, the controller 300 may store predetermined reference intervals for any parameter that can be set, and the controller 300 may be configured to compare a received value for a parameter to such a predetermined reference interval. If the verification of the instruction would fail, the controller 300 may be configured to reject the instruction, i.e. not run the instruction. In an alternative to encrypting and decrypting the instruction, the instruction may be signed by the second external device 330 using a cryptographic hash, and the controller 300 may be configured to verify that the signature is correct before running the instruction. A corresponding method for transmitting an instruction will now be described with reference to Figs. 52a – 52c. The instruction may relate to a function of the implantable medical device, such as an instruction to run a function or method of the implantable medicaldevice, or to set a value of a parameter of the implantable medical device. The method comprises: transmitting an instruction for theimplantable medical device from the first external device 300 to a second external device 320, the instruction relating to a function of the implantable medical device 10, encrypting, at the second external device 330 using a first encryption key, the instruction into an encrypted instruction, and transmitting the encrypted instruction from the second external device 330 to the implantable medical device 10, decrypting, at the implantable medical device, the instructions using a second encryption key corresponding to the first encryption key. The steps performed by or at the implantable medical device may be executed by the controller 300. The instruction may be any type of instruction for controlling a function of the implantable medical device. For example, the instruction may be an instruction to run a function or method of the implantable medical device 10 or controller an instruction comprising a plurality of sub-steps to be run at the controller 300, or a value for a parameter at the controller 300. The first external device 320 may, for example, receive the instruction from a user via a user interface displayed at or connected to the first external device 320. In another example, the first external device 320 may determine the instruction in response to data received from the implantable medical device 10, such as measurement data, or from another external device. Thus, in some examples, the method may further comprise receiving, at the first external device 320, an instruction to be transmitted to the implantable medical device 10. The method may furthercomprise displaying a user interface for receiving the instruction. In another example, the method comprises determining, at the first external device 320, an instruction to be transmitted to the implantable medical device 10. In some embodiments, the transmitting of the encrypted instruction from the second external device 330 to the implantable medical device 10 comprises transmitting the encrypted instruction from the second external device 330 to the first external device 320, and transmitting the encrypted instruction from the first external device 320 to the controller 300 of the implantable medical device 10. In other words, the first external device 320 may relay the encrypted instruction from the second external device 330 to the controller 300, preferably without decrypting the instruction before transmitting it. The method may further comprise to, at the controller 300, running the instruction or performing the instruction. The running ofthe instruction may be performed by an internal computing unit or a processor 306 comprised in the controller 300, and may, for example, cause the internal computing unit or processor 306 to instruct the implantable medical device 302 to perform an action. The method may further comprise verifying, at the second external device 330, that the instructions are correct. The verifying may be performed as described above with reference to the corresponding system. The method may further comprise verifying, at the controller 300, that the instructions are correct. The verifying may be performed as described above with reference to the corresponding system. The method may further comprise authenticating the connection between the first external device 320 and the controller 300 over which the encrypted instruction is to be transmitted. The authentication may be performed as described herein. As described above, a control program of the controller 300 may be updatable, configurable or replaceable. A system and amethod for updating or configuring a control program of the controller 300 is now described with reference to figs.52a – 52c. Thecontroller may comprise an internal computing unit 306 configured to control a function of the implantable medical device 10, the internal computing unit 306 comprises an internal memory 307 configured to store: i. a first control program 310 for controlling the internal computing unit, and ii. a second, configurable or updatable, with predefined program steps, control program 312 for controlling said function of the implantable medical device 10, and iii. a set of predefined program steps for updating the second control program 312. The controller 300 is configured to communicate with an external device 320. The internal computing unit 306 is configured to receive an update to the second control program 312 via the controller 300, and a verification function of, connected to, or transmitted to the controller 300. The verification function is configured to verify that the received update to the second control program 312 comprises program steps comprised in the set of predefined program steps. In this way, the updating or programming of the second control program may be performed using predefined program steps, which may decrease the risk that the new or updated control program is incorrect orcomprises malicious software, such as a virus, spyware or a malware. The predefined program steps may comprise setting a variable related to a pressure, a time, a minimum or maximum temperature, a current, a voltage, an intensity, a frequency, an amplitude of electrical stimulation, a feedback mode (sensorics or other), a post-operative mode or a normal mode, a catheter mode, a fibrotic tissue mode (for example semi-open), a time open after urination, a time open after urination before bed-time. The verification function may be configured to reject the update in response to the update comprising program steps not comprised in the set of predefined program steps and/or be configured to allow the update in response to the update only comprising program steps comprised in the set of predefined program steps. The internal computing unit 306 may be configured to install the update in response to a positive verification, for example by a user using an external device, by a button or similarly pressed by a user, or by another external signal. The authentication or verification of communications between the implant and an external device has been described above. When updating a control program of the controller 300, it may be beneficial to transmit a confirmation to a user or to an externaldevice or system. Such a method is now described with reference to figs. 52a – 52b. The method for updating a control program of a controller 300 comprised in the implantable medical device 10 according to any of the embodiments herein. The controller 300 is adapted for communication with a first external device 320 and a second external device330, which may comprise receiving, by the internal computing unit, an update or configuration to the control program from the first external device, wherein the update is received using a first communication channel; installing, by the internal computing unit 306, theupdate; and transmitting, by the internal computing unit, logging data relating to the receipt of the update or configuration and/or loggingdata relating to an installation of the update to the second external device 330 using the second communication channel; wherein the first and the second communication channels are different communication channels. By using a first and a second communication channels, incomparison to only using one, the security of the updating may be improved as any attempts to update the control program will be logged via the second communication channel, and thus, increasing the chances of finding incorrect or malicious update attempts. The update or configuration comprises a set of instructions for the control program, and may, for examples comprise a set of predefined program steps as described above. The configuration or update may comprise a value for a predetermined parameter.In some examples, the method further comprises confirming, by a user or by an external control unit, that the update or configuration is correct based on the received logging data. The logging data may be related to the receipt of the update or configuration, and the controller 300 is configured to install the update or configuration in response to receipt of a confirmation that the logging data relates to a correct set of instructions. In this way, the controller 300 may receive data, transmit a logging entry relating to the receipt, and then install the data in response to a positive verification that the data should be installed. In another example, or in combination with the one described above, the logging data is related to the installation or the update or configuration. In this example the logging data may be for information purposes only and not affect the installation, or the method may further comprise activating the installation in response to the confirmation that the update or configuration is correct. If the update or configuration is transmitted to the controller 300 in one or more steps, the verification as described above may be performed for each of the steps. The method may further comprise, after transmitting the logging data to the second external device, verifying the update via a confirmation from the second external device 330 via the second communication channel. With reference to Fig.52a – 52c there may further be provided an implantable controller 300. The controller 300 is connected toa sensor 351 wherein the sensor 351 is at least one microphone sensor 351 configured to record acoustic signals. For instance, the controller 300 may be configured to register a sound related to at least one of a bodily function of the patient and a function of theimplantable medical device 10. The controller 300 comprises a computing unit 306 configured to derive at least one of a pulse of the patient from the registered sound related to a bodily function, such as information related to the patient swallowing, from the registered sound related to a bodily function. In the alternative, the controller 300 could be configured to derive information related to a functional status of the implantable medical device 10 from the registered sound, such as RPM of the motor. To this end the computing unit 306 may be configured to perform signal processing on the registered sound (e.g. on a digital or analog signal representing the registered sound) so as to derive any of the above mentioned information related to a bodily function of the patient or a function of the implantable medical device 10. The signal processing may comprise filtering the registered sound signals of the microphone sensor 351. The implantable controller is placed in an implantable housing for sealing against fluid, and the microphone sensor 351 is placed inside of the housing. Accordingly, the controller and the microphone sensor 351 do not come into contact with bodily fluids when implanted which ensures proper operation of the controller and the microphone sensor 351. In some implementations, the computing unit 306 is configured to derive information related to the functional status of an active unit 302 of the implantable medical device 10, from the registered sound related to a function of the implantable medical device 10. Accordingly, the computing unit 306 may be configured to derive information related to the functional status of at least one of: a motor, a pump and a transmission of the active unit 302 of the implantable medical device 10, from the registered sound related to a function of the implantable medical device 10. The controller may comprise a transceiver 303,308 configured to transmit a parameter derived from the sound registered by the at least one microphone sensor 351 using the transceiver 303,308. For example, the transceiver 303,308 is a transceiver configured to transmit the parameter conductively (303) to an external device 320 or wirelessly (308) to an external device 320. A method of authenticating the implantable medical device 10, the external device 320 or a communication signal or data streambetween the external device 320 and the implantable medical device 10 is also described with reference to figs.52a – 52c. The method comprises the steps of registering a sound related to at least one of a bodily function and a function of the implantable medical device 10, using the at least one microphone sensor 351, connected to the controller 300. The method could in a first authentication embodimentcomprise transmitting a signal derived from the registered sound, using the transceiver 303,308, receiving the signal in the external device 320, using the receiver 323,328 and comparing, in the external device 320, a parameter derived from the received signal with a reference parameter, using the computing unit 306. The method could in a second authentication embodiment comprise receiving a signal in the controller 300, from the external device 320, using the transceiver 323,328 and deriving a reference parameter from the received signal, using the computing unit 306 of the controller 300, and comparing, in the controller 300, a parameter derived from the received signal with the derived reference parameter, using the computing unit 306 of the controller 300. The methods further comprise the steps of the implantable controller 300 authenticating the external device 320, or the external device 320 authenticating the implantable controller 300, on the basis of the comparison. The registered sound could for example be related to the patient eating. According to one embodiment described with reference to fig. 52A – 52C, the communication unit or internal controller 300 or control unit 300 comprises a wireless transceiver 308 for communicating wirelessly with an external device, a security module 389, and a central unit, also referred to herein as a computing unit 306, which is to be considered as equivalent. The central unit 306 is configured to be in communication with the wireless transceiver 308, the security module 389 and the active unit 302 i.e. the medical device for stretching the stomach. The wireless transceiver 308 is configured to receive communication from the external device 320 including at least one instruction to the implantable system 10 and transmit the received communication to the central unit or computing unit 306. The central unit or computing unit 306 is configured to send secure communication to the security module 389, derived from the received communication from the external device 200, and the security module 389 is configured to decrypt at least a portion of the secure communication and verify the authenticity of the secure communication. In one embodiment, the security module is further configured to transmit a response communication to the central unit or computing unit 306 and the central unit or computing unit is configured to communicate the at least one instruction to the active unit 302. In another embodiment, the security module is configured to communicatethe at least one instruction to the active unit 302 directly. In the embodiment shown in fig. 52A – 52C, the at least one instruction is based on the response communication, or a combination of the response communication and the received communication from the external device 320. In the embodiment shown in fig. 52A – 52C, the security module 389 comprises a set of rules for accepting communication fromthe central unit or computing unit 306. In the embodiment shown in fig. 52A – 52C, the wireless transceiver 308 is configured to be able to be placed in an off-mode, in which no wireless communication can be transmitted or received by the wireless transceiver 308. The set of rules comprises a rule stipulating that communication from the central unit or computing unit 306 to the security module 389 or to the active unit 302 is only accepted when the wireless transceiver 308 is placed in the off-mode. In the embodiment shown in fig.52A – 52C, the set of rules comprises a rule stipulating that communication from the central unit or computing unit 306 is only accepted when the wireless transceiver 308 has been placed in the off-mode for a specific time period. In the embodiment shown in fig.52A – 52C, the central unit or computing unit 306 is configured to verify a digital signature of the received communication from the external device 320. The digital signature could be a hash-based digital signature which could be based on a biometric signature from the patient or a medical professional. The set of rules further comprises a rule stipulating that communication from the central unit 306 is only accepted when the digital signature of the received communication has been verified by the central unit 306. The verification could for example comprise the step of comparing the digital signature or a portion of the digital signature with a previously verified digital signature stored in the central unit 306. The central unit 306 may be configured to verify the size of the receivedcommunication from the external device and the set of rules could comprise a rule stipulating that communication from the central unit 306 is only accepted when the size of the received communication has been verified by the central unit 306. The central unit could thus have arule stipulating that communication above or below a specified size range is to be rejected. In the embodiment shown in fig.52A – 52C, the wireless transceiver is configured to receive a message from the external device 320 being encrypted with at least a first and second layer of encryption. The central unit 306 the decrypts the first layer of decryption and transmit at least a portion of the message comprising the second layer of encryption to the security model 389. The security module 389 then decrypts the second layer of encryption and transmits a response communication to the central unit 306 based on the portion of the message decrypted by the security module 389 or transmits the decrypted data to the active unit 302. In the embodiment shown in fig.52A – 52C, the central unit 306 is configured to decrypt a portion of the message comprising a digital signature, such that the digital signature can be verified by the central unit 306, also the central unit 306 is configured to decrypt a portion of the message comprising message size information, such that the message size can be verified by the central unit 306. In the embodiment shown in fig.52A – 52C, the central unit 306 is configured to decrypt a first and second portion of the message, and the first portion comprises a checksum for verifying the authenticity of the second portion. In the embodiment shown in fig.52A – 52C, the response communication transmitted from the security module 389 comprises a checksum, and the central unit 306 is configured to verify the authenticity of at least a portion of the message decrypted by the central unit 306 using the received checksum, i.e. by adding portions of the message decrypted by the central unit 306 and comparing the sum to the checksum. In the embodiment shown in fig.52A – 52C, the set of rules further comprise a rule related to the rate of data transfer between the central unit 306 and the security module 389. The rule could stipulate that the communication should be rejected or aborted if the rate of data transfer exceeds a set maximum rate of data transfer, which may make it harder for unauthorized persons to inject malicious code or instructions to the medical implant. In the embodiment shown in fig.52A – 52C, the security module 389 is configured to decrypt a portion of the message comprising the digital signature being encrypted with the second layer of encryption, such that the digital signature can be verified by the security module 389. The security module 389 then transmits a response communication to the central unit 306 based on the outcome of the verification, which can be used by the central unit 306 for further decryption of the message or for determining if instructions in themessage should be communicated to the active unit 302. Alternatively, the security module determines at least one instruction for the active unit 302 based on the message, and transmits the message to the active unit 203 directly. In the embodiment shown in fig.52A – 52C, the central unit 306 is only capable of decrypting a portion of the receivedcommunication from the external device 320 when the wireless transceiver 308 is placed in the off-mode. In the alternative, or as an additional layer of security, the central unit 306 may be limited such that the central unit 306 is only capable of communicating instructions to the active unit 302 of the implantable medical device 10 when the wireless transceiver 308 is placed in the off-mode. This ensures that no attacks can take place while the central unit 306 is communicating with the active unit 301. In the embodiment shown in fig.52A – 52C, the implantable controller 300 is configured to receive, using the wireless transceiver 308, a message from the external device 320 comprising a first un-encrypted portion and a second encrypted portion. Theimplantable controller 300 (e.g. the central unit 306 or the security module 389) then decrypts the encrypted portion, and uses the decrypted portion to verify the authenticity of the un-encrypted portion. As such, computing power and thereby energy can be saved by not encrypting the entire communication, but rather only the portion required to authenticate the rest of the message (such as a checksum and/or a digital signature) In the embodiment shown in fig.. 52A – 52C, the central unit 306 is configured to transmit an encrypted portion to the security module 389 and receive a response communication from the security module 389 based on information contained in the encrypted portion being decrypted by the security module. The central unit 306 is then configured to use the response communication to verify the authenticity of the un-encrypted portion. The un-encrypted portion could comprise at least a portion of the at least one instruction to the implantable medical device 306. Alternatively, the central unit 306 is configured to transmit an encrypted portion and an unencrypted portion to the security module 389 and the security module 398 decrypts the encrypted portion and, using the decrypted portion, verifies the authenticity of the un-encrypted portion. In the embodiment shown in fig.52A – 52C, the implantable controller 300 is configured to receive, using the wireless transceiver 308, a message from the external device 320 comprising information related to at least one of: a physiological parameter of the patient and a physical or functional parameter of the implanted system 10, and use the received information to verify the authenticity of the message. The physiological parameter of the patient could be a parameter such as a parameter based on one or more of: a temperature, a heartrate and a saturation value. The physical or functional parameter of the implanted system 10 could comprise at least one of a current setting or value of the active unit 302, a prior instruction sent to the implantable system 10 or an ID of the implanted system 10. The portion of the message comprising the information related to the physiological parameter of the patient and/or physical or functional parameter of the implanted system 10 could be encrypted, and the central unit 306 may be configured to transmit the encryptedportion to the security module 389 and receive a response communication from the security module 389 based on the information having been decrypted by the security module 389. In the embodiment shown in fig.52A – 52C, the security module 389 is a hardware security module comprising at least one hardware-based key. The security module 389 may have features that provide tamper evidence such as visible signs of tampering or logging and alerting. It may also be so that the security module 389 is “tamper resistant”, which makes the security module 389 inoperable in the event that tampering is detected. For example, the response to tampering could include deleting keys is tampering is detected. The security module 389 could comprise one or more secure crypto processor chip. The hardware-based key(s) in the security module 389 could have a corresponding hardware-based key placeable in the external device 320. The corresponding external hardware-based key could be placed on a key-card connectable to the external device 320. In one embodiment, the security module 387 and the central unit 309 are both comprised in a multi-processor, wherein the security module 387 runs on a first processor and the central unit runs on second processor, different from the first. In alternative embodiments, the security module 389 is a software security module comprising at least one software-based key, or a combination of a hardware and software-based security module and key. The software-based key may correspond to a software-based key in the external device 320. The software-based key may correspond to a software-based key on a key-card connectable to the external device 320. In the embodiment shown in fig.52A – 52C, the external device 320 is a handheld external device, however, in alternative embodiments, the external device may be a remote external device or a cloud based external device In the embodiment shown in fig.52A – 52C, the at least one instruction to the implantable system 10 comprises an instruction for changing an operational state of the implantable system 10, including an operational state of the active unit 302, i.e. medical device for stretching the stomach. In the embodiment shown in fig.52A – 52C, the wireless transceiver 308 is configured to communicate wirelessly with theexternal 320 device using electromagnetic waves at a frequency below 100 kHz, or more specifically below 40 kHz. The wireless transceiver 308 is thus configured to communicate with the external device 320 using “Very Low Frequency” communication (VLF). VLF signals have the ability to penetrate a titanium housing of the implantable system 10, such a titanium housing of the remote unit, such that the electronics of the implantable system 10 can be completely encapsulated in a titanium housing. The wireless transceiver 308 is configured to communicate wirelessly with the external device 320 using a first communication protocol and the central unit 306 is configured to communicate with the security module 389 using a second, different, communication protocol. This adds an additional layer of security as security structures could be built into the electronics and/or software in the central unit 106 enabling the transfer from a first to a second communication protocol. The wireless transceiver 308 may be configured to communicate wirelessly with the external device using a standard network protocol, which could be one of an RFID type protocol, a WLAN type protocol, a Bluetooth (BT) type protocol, a BLE type protocol, an NFC type protocol, a 3G/4G/5G type protocol, and a GSM type protocol. In the alternative, or as a combination, the wireless transceiver 308 could be configured to communicate wirelessly with the external device 320 using a proprietary network protocol. The wireless transceiver 308 could comprises an Ultra-Wide Band (UWB) transceiver andthe wireless communication between the implantable controller 300 and the external device 320 could thus be based on UWB. The use of UWB technology enables positioning of the external device 320 which can be used by the implanted system 10 as a way to establish that the external device 320 is at a position which the implanted system 10 and/or the patient can acknowledge as being correct, e.g. in the direct proximity to the implanted system 10 and/or the patient, such as within reach of the patient and/or within 1 or 2 meters of the implanted system 10. In the alternative, a combination of UWB and BT could be used, in which case the UWB communication can be used to authenticate the BT communication, as it is easier to transfer large data sets using BT. Embodiments relating to an implantable medical device 10 having a controller 300 having a processor 306 with a sleep mode and an active mode will now be described with reference to Fig.52d. The implant, the internal communication unit and the external device(s) mayhave the features described above with reference to figs. 52a – 52c. In an embodiment in which the controller 300 comprises a processor 306 having a sleep mode and an active mode, the controller 300 comprises or is connected to a sensor 150 and a processing unit 306 having a sleep mode and an active mode. The sensor 150 is configured to periodically measure a physical parameter of the patient, and the controller 300 is further configured to, in response to a sensor measurement preceding a predetermined value, setting the processing unit 306 in an active mode. That is, the controller 300 may “wake up” or be set in an active mode in response to a measurement from, for example, the body. A physical parameter of the patient could for example be a local or systemic temperature, saturation/oxygenation, blood pressure or a parameter related to an ischemia marker such as lactate. By sleeping mode, it is meant a mode with less battery consumption and/or processing power used in the processing unit 306, and by “active mode” it may be meant that the processing unit 306 is not restricted in its processing. The sensor 150 may, for example, be a pressure sensor. The pressure sensor may be adapted to measure a pressure in an organof a patient, a reservoir of the implant or a pressure exerted by at least one member. The sensor 150 may be an analog sensor or a digital sensor, i.e., a sensor 150 implemented in part in software. In some examples, the sensor is adapted to measure one or more of a battery or energy storage status of the implantable medical device 10 and a temperature of the implantable medical device 10. In this way, the sensor 150 may periodically sense a pressure of the implantable medical device 10 or of the patient and set the processing unit 306 in an activemode if the measured pressure is above a predetermined value. Thus, less power, i.e., less of for example a battery or energy storage comprised in the implant, may be used, thereby prolonging the lifetime of the implantable medical device 10 or increasing the time between charging occasions of the implantable medical device 10. In some examples, the processor 306, when in set in the active mode, may cause a sensation generator 381 connected to the implant, comprised in the implantable medical device 10 or comprised in an external device 320, 330, to generate a sensation detectable by a sense of the patient. For example, the processor may cause the sensation generator to generate a sensation in response to a measure battery status, for example that the battery is above or below a predetermined level, that a measured pressure is above or below a predetermined level, or that another measured parameter has an abnormal value, i.e., less than or exceeding a predetermined interval or level. The sensation generator has been described in further detail earlier in this description. The processing unit 306 may be configured to perform a corrective action in response to a measurement being below or above a predetermined level. Such a corrective action may, for example, be increasing or decreasing a pressure, increasing or decreasing electrical stimulation, increasing or decreasing power. The controller 300 may comprise a signal transmitter 320 connected to the processing unit, and wherein the processing unit is configured to transmit data relating to the measurement via the transceiver 308 of the controller 300 or an additional internal signaltransmitter 392. The transmitted data may be received by an external device 320. The external device may have an external communication unit 390. The external device 320 may comprise a signal provider 380 for providing a wake signal to the controller 300. In some examples, the signal provider comprises a coil or magnet 371 for providing a magnetic wake signal. The controller 300 may implement a corresponding method for controlling an implantable medical device 10 when implanted in a patient. The method comprises measuring, with a sensor of the controller 300 connected to or comprised in the controller 300, a physiological parameter of the patient or a parameter of the implantable medical device 10, and, in response to a sensor measurementhaving an abnormal value, setting, by the controller 300, a processor 306 of the controller 300 from a sleep mode to an active mode. The measuring may be carried out periodically. By “abnormal value” it may be meant a measured value exceeding or being less than a predetermined value, or a measured value being outside a predetermined interval. The method may further comprise generating, with asensation generator 381 as described above, a sensation detectable by the patient. In some examples, the generating comprises requesting, by the processor, the sensation generator 381 to generate the sensation. The method may further comprise to perform a medical intervention in response to a sensor measurement having an abnormal value, preferably after the processing unit has been set in the active mode. A system comprising an implantable medical device 10 having a controller 300 having a sleep mode and an active mode will now be described with reference to Fig.52d. In one embodiment, the controller 300 comprises a sensor 150 adapted to detect a magnetic fieldand a processing unit 306 having a sleep mode and an active mode, now described with reference to figs. 52a – 52c. The external controlunit 320 comprises a signal provider 380 adapted to provide a magnetic field detectable by the internal sensor 150. The controller 300 is further configured to, in response to a detected magnetic field exceeding a predetermined value, setting the processing unit 306 in an active mode. In this way, the external device 320 may cause a sleeping controller 300 or processor 306 to “wake up”. The sensor 150 may, for example, be a hall effect sensor, a fluxgate sensor, an ultra-sensitive magnetic field sensor, a magneto- resistive sensor, an AMR or GMR sensor, or the sensor may comprise a third coil having an iron core. The magnetic field provider 380 may have an off state, wherein it does not provide any magnetic field, and an on state, wherein it provides a magnetic field. For example, the magnetic field provider 380 may comprise a magnet 371, a coil 371, a coil having a core 371, or a permanent magnet 371. In some embodiments, the magnetic field provider 380 may comprise a shielding means for preventing a magnet 371or permanent magnet 371 from providing a magnetic field in the off state. In order to provide a substantially even magnetic field, the magnetic field provider may comprise a first and a second coil arranged perpendicular to each other. After the processing unit 306 has been set in an active mode, i.e., when the processing unit 306 has been woken, the implant may determine a frequency for further communication between the controller 300 and the external device 320. The controller 300 may thus comprise a frequency detector 391 for detecting a frequency for communication between the controller 300 and the second communication unit 390. The frequency detector 391 is, for example, an antenna. The external device 320 may comprise a frequency indicator 372, fortransmitting a signal indicative of a frequency. The frequency indicator 372, may, for example, be a magnetic field provider capable oftransmitting a magnetic field with a specific frequency. In some examples the frequency indicator is comprised in or the same as the magnetic field provider 371. In this way, the frequency signal is detected using means separate from the sensor, and can, for example, be detected using a pin on a chip. Alternatively, the controller 300 and the external device 320 may communicate using a predetermined frequency or a frequencydetected by means defined by a predetermined method according to a predetermined protocol to be used for the communication between the controller 300 and the external device 320. In some embodiments, the sensor 150 may be used for the communication. The communication may in these embodiments beperformed with such that a frequency of the magnetic field generated by the coil is 9-315 kHz, or the magnetic field generated by the coil is less than or equal to 125kHz, preferably less than 58kHz. The frequency may be less than 50Hz, preferably less than 20Hz, more preferablyless than 10Hz, in order to be transmittable through a titanium box. In some embodiments, the controller 300 comprises a receiver unit 392, and the internal control unit and the external control unit are configured to transmit and/or receive data via the receiver unit 392 via magnetic induction. The receiver unit 392 may comprise a high-sensitivity magnetic field detector, or the receiver unit may comprise a fourth coil for receiving the magnetic induction. The system may implement a method for controlling a medical implant implanted in a patient. The method comprises monitoringfor signals by a sensor 150 comprised in the controller 300 communicatively coupled to the active unit 302, providing, from a signalprovider 380 comprised in an external device 320, a wake signal, the external device 320 being adapted to be arranged outside of the patient’s body, and setting, by the controller 300 and in response to a detected wake signal WS, a mode of a processing unit 306 comprised in the internal control unit from a sleep mode to an active mode. The method may also comprise detecting, using a frequency detector 391, a frequency for data communication between the controller 300 and a second communication unit 390 being associated with the external device 320. The frequency detector 391 is communicatively coupled to the controller 300 or the external device 320. The detection may be performed using a detection sequence for detecting the frequency. This detection sequence may, for example, be a detection sequence defined in the protocol to be used for communication between the controller 300 and the second communication unit 390. Potential protocols that may be used forcommunication between the controller 300 and the external device 320 has been described earlier in this description. Thus, the method may comprise determining, using the frequency detector 391, the frequency for data communication, and initiating data communicationbetween the controller 300 and the second communication unit 390. The data communication can, for example, comprise one or more control instructions for controlling the implantable medical device 10 transmitted from the external device 320, or, for example, comprise data related to the operation of the implantable medical device 10 and be transmitted from the controller 300. In some examples, the implantable medical device may comprise or be connected to a power supply for powering the implantablemedical device 10. This will now be described with reference to fig. 52e. The medical device, the internal control unit, and the externaldevice(s) may comprise all elements described above with reference to figs. 52a – 52c and fig. 52d. The power supply may comprise an implantable energy storage unit 40 for providing energy to the medical device, an energy provider 397 connected to the implantable energystorage unit 40 and connected to an energy consuming part of the implantable medical device 10, the energy provider 397 being configured to store energy to provide a burst of energy to the energy consuming part, wherein the energy provider 397 is configured to be charged by the implantable energy storage unit 40 and to provide the energy consuming part with electrical power during startup of the energy consuming part. Alternatively, the implantable medical device 10 may comprise a first implantable energy storage unit 40 for providing energy to an energy consuming part of the implantable medical device 10, a second implantable energy storage unit 397 connected to the implantable energy storage unit 40 and connected to the energy consuming part, wherein the second implantable energy storage unit 397 is configuredto be charged by the implantable energy storage unit 40 and to provide the energy consuming part with electrical power during startup of the energy consuming part. The second implantable energy storage unit 397 has a higher energy density than the first implantable energy storage unit 40. By having a “higher energy density” it may be meant that the second implantable energy storage unit 397 has a higher maximum energy output per time unit than the first implantable energy storage unit 40. The second energy storage 397 may be an energy provider as discussed below. The energy consuming part may be any part of the implantable medical device 10, such as a motor for powering the hydraulicpump, a valve, a processing or computing unit, a communication unit, a device for providing electrical stimulation to a tissue portion of the body of the patient, a CPU for encrypting information, a transmitting and/or receiving unit for communication with an external unit (not shown as part of the energy consuming part in the drawings, that is, the communication unit may be connected to the energy storage unit 40 and to the energy provider 397), a measurement unit or a sensor, a data collection unit, a solenoid, a piezo-electrical element, a memory metal unit, a vibrator, a part configured to operate a valve comprised in the medical device, or a feedback unit. In this way, an energy consuming part requiring a quick start or an energy consuming part which requires a high level or burst of energy for a start may be provided with sufficient energy. This may be beneficial as instead of having an idle component using energy, the component may be completely turned off and quickly turned on when needed. Further, this may allow the use of energy consuming parts needing a burst of energy for a startup while having a lower energy consumption when already in use. In this way, a battery or an energystorage unit having a slower discharging (or where a slower discharging is beneficial for the lifetime or health of the battery) may be used for the implant, as the extra energy needed for the startup is provided by the energy provider. Energy losses may occur in a battery or energy storage unit of an implant if the battery or energy storage unit is discharged toofast. These energy losses may for example be in the form of heat, which may damage the battery or energy storage unit. By the apparatus described in these examples, energy may be provided from the battery or energy storage unit in a way that does not damage the battery or energy storage unit, which may improve the lifetime of the battery or energy storage unit and thereby the lifetime of the medical device. In some examples, the discharging from the implantable energy storage unit 40 during startup of the energy consuming part is slower than the energy needed for startup of the energy consuming part, i.e., the implantable energy storage unit 40 is configured to have aslower discharging than the energy needed for startup of the energy consuming part. That is, there is a difference between the energy needed by the energy consuming part and the energy the implantable energy storage unit 40 is capable of providing without damaging the implantable energy storage unit 40. In other words, a maximum energy consumption of the energy consuming part may be higher than themaximum energy capable of being delivered by the implantable energy storage unit 40 without causing damage to the implantable energy storage unit, and the energy provider 397 may be adapted to deliver an energy burst corresponding to difference between the requiredenergy consumption and the maximum energy capable of being delivered by the implantable energy storage unit 40. The implantable energystorage unit 40 may be configured to store a substantially larger amount of energy than the energy burst provider 397 but may be slower to charge. The implantable energy storage unit 40 may be any type of energy storage unit suitable for an implant, such as a re-chargeable battery or a solid-state battery, such as a tionyl-chlorid battery. The implantable energy storage unit 40 may be connected to the energy consuming part and configured to power the energy consuming part after it has been started using the energy provider 397. The energy provider 397 may be any type of part configured to provide a burst of energy for the energy consuming part. In some examples, the energy provider 397 is a capacitor, such as a start capacitor, a run capacitor, a dual run capacitor or a supercapacitor. The energy provider 397 may be connected to the implantable energy storage unit 40 and be adapted to be charged using the implantableenergy storage unit 40. In some examples, the energy provider may be a second energy provider 397 configured to be charged by the implantable energy storage unit 40 and to provide the energy consuming part with electrical energy. The implantable medical device 10 mayfurther comprising a temperature sensor for sensing a temperature of the capacitor and the temperature sensor may be integrated orconnected to the controller 300 such that the sensed temperature can be used as input for controlling the implantable medical device 10 or as feedback to be sent to an external device 320. A corresponding method for powering a medical device may also be contemplated. The method comprises the steps of initiating an energy consuming part 302 of the implant, the energy consuming part being connected to an implantable energy storage unit 40, providing an initial burst of energy to the energy consuming part using an energy provider 397 connected to the implantable energy storage unit 40 and to the energy consuming part 302, the energy provider 397 being adapted to provide a burst of energy to the energy consuming part, and subsequently powering the energy consuming part 302 using the implantable energy storage unit 40. In some examples, a maximum energy consumption of the energy consuming part is higher than the maximum energy capable of being delivered by the implantable energy storage unit 40 without causing damage to the implantable energy storage unit 40, and the energy provider 397 is adapted to deliver an energy burst corresponding to difference between the required energy consumption and the maximum energy capable of being delivered by the implantable energy storage unit 40. The method may further comprise the step of charging the energy provider 397 using the implantable energy storage unit 40. Initiating an energy consuming part 302may comprise transitioning a control unit of the medical device from a sleep mode to an operational or active mode. The implantable energy storage unit 40 may be adapted to be wirelessly charged and the implantable energy storage unit may be connected to an internal charger 395 for receiving wireless energy from an external device 320 via an external charger 396, and the method may comprise wirelessly charging the implantable energy storage unit 40. In some examples, the method comprises controlling a receipt of electrical power from an external energy storage unit at the internal charger 395. The internal energy storage unit 40 may be charged via the receipt of a transmission of electrical power from an external energy storage unit 396 by the internal charger 395. The embodiments described herein may advantageously be combined. For example, all the embodiments relating to the communication and controlling of the medical device may be combined with the embodiments relating to the programming of the implant, the methods and systems for improving energy consumption or the power supply. The embodiments relating to the programming of the medical device may be combined with any of the embodiments relating to improving the energy consumption or the power supply. Theembodiments relating to the power supply maybe combined with the methods and systems for improving the energy consumption. A computer program product of, or adapted to be run on, an internal computing unit or an external device is also provided, which comprises a computer-readable storage medium with instructions adapted to make the internal computing unit and/or the external device perform the actions as described in any embodiment or example above. Fig.52f and fig.52fa shows one embodiment of a system for charging, programming and communicating with the controller 300 of the implanted medical device 100. Fig.52f and 52fa further describes the communication and interaction between different external devices which may be devices held and operated by the patient, by the health care provider (HCP) or by the Dedicated Data Infrastructure (DDI), which is an infrastructure supplier for example by the manufacturer of the implanted medical device 100 or the external devices 320’,320’’,320’’’. The system of the embodiment of fig.52f and 52fa comprises three external devices 320’,320’’,320’’’ capable of communicating with the controller 300. The basic idea is to ensure the security of the communication with, and the operation of, the medical device 100 by having three external devices 320’,320’’,320’’’ with different levels of authority. The lowest level of authority is given to the patient operated remote control 320’’. The remote control external device 320’’ is authorized to operate functions of the implanted medical device 100 via the implanted controller 300, on the basis of patient input. The remote control 320’’ is further authorized to fetch some necessary data from the controller 300. The remote control 320’’ is only capable of operating the controller 300 by communicating with the software currently running on the controller 300, with the currently settings of the software. The next level of authority is given tothe Patient External Interrogation Device (P-EID) 320’’’, which is a charging and communication unit which is held by the patient but is partially remotely operated by the Health Care Provider (HCP) (Usually a medical doctor with the clinic providing the treatment with help of the implanted medical device 100). The P-EID 320’’’ is authorized to make setting changes by selecting pre-programmed steps of the software or hardware running on the controller 300 of the implanted medical device 100. The P-EID is remotely operated by the HCP, and receives input from the HCP, via the DDI. The highest level of authority is given to the HCP-EID 320’ and its controller the HCP Dedicated Display Device (DDD). The HCP-EID 320’ is a charging and communication unit which is held by the HCP physically at the clinic of the HCP. The HCP-EID 320’ is authorized to freely alter or replace the software running on the controller 300, when the patient is physically in the clinic of the HCP. The HCP-EID 320’ is controlled by the HCP DDD, which either acts on a “webview” portal from the HCP-EID or is a device closed down to any activities (which may include the absence of an internet connection) other than controlling and communicating with the HCP- EID. The webview portal does not necessarily mean internet based or HTML-protocol and the webview portal may be communicated over other communicating protocols such as Bluetooth or any other type of standard or proprietary protocol. The HCP DDD may also communicate with the HCP-EID over a local network or via Bluetooth or other standard or proprietary protocols. Starting from the lowest level of authority, the patient remote control external device 320’’ comprises a wireless transceiver328 for communicating with the implanted medical device 100. The remote control 320’’ is capable of controlling the operation of theimplanted medical device 100 via the controller 300, by controlling pre-set functions of the implantable medical device 100, e.g., foroperating an active portion of the implanted medical device 100 for performing the intended function of the implanted medical device 100. The remote control 320’’ is able communicate with implanted medical device 100 using any standard or proprietary protocol designed for the purpose. In the embodiment shown in fig.52f and 52fa, the wireless transceiver 328 comprises a Bluetooth (BT) transceiver, and the remote control 320’’ is configured to communicate with implanted medical device 100 using BT. In an alternative configuration, the remotecontrol 320’’ communicates with the implanted medical device 100 using a combination of Ultra-Wide Band (UWB) wireless communication and BT. The use of UWB technology enables positioning of the remote control 320’’ which can be used by the implanted medical device 100 as a way to establish that the remote control 320’’ is at a position which the implanted medical device 100 and/or the patient can acknowledge as being correct, e.g. in the direct proximity to the medical device 100 and/or the patient, such as within reach of the patient and/or within 1 or 2 meters of the implanted medical device 100. UWB communication is performed by the generation of radio energy at specific time intervals and occupying a large bandwidth, thus enabling pulse-position or time modulation. The information can also be modulated on UWB signals (pulses) by encoding the polarity of the pulse, its amplitude and/or by using orthogonal pulses. A UWB radio system can be used to determine the "time of flight" of the transmission at various frequencies. This helps overcome multipath propagation, since some of the frequencies have a line-of-sight trajectory, while other indirect paths have longer delay. With a cooperative symmetric two-way metering technique, distances can bemeasured to high resolution and accuracy. UWB is useful for real-time location systems, and its precision capabilities and low power make it well-suited for radio-frequency-sensitive environments, such as health care environments. In embodiments in which a combination of BT and UWB technology is used, the UWB technology may be used for location-based authentication of the remote control 320’’, whereas the communication and/or data transfer could take place using BT or any other way of communicating different from the UWB. The UWB signal could in some embodiments also be used as a wake-up signal for the controller 300, or for the BT transceiver, such that the BT transceiver in the implanted medical device 100 can be turned off when not in use, which eliminates the risk that the BT is intercepted, or that the controller 300 of the implanted medical device 100 is hacked by means of BT communication. In embodiments in which a BT (or alternatives) / UWB combination is used, the UWB connection may be used also for thetransmission of data. In the alternative, the UWB connection could be used for the transmission of some portions of the data, such as sensitive portions of the data, or for the transmission of keys for the unlocking of encrypted communication sent over BT. The remote control 320’’ comprises computing unit 326 which runs a software application for communicating with the implanted medical device 100. The computing unit 326 can receive input directly from control buttons 335 arranged on the remote control 320’’ or may receive input from a control interface 334i displayed on a patient display device 334 operated by the patient. In the embodiments in which the remote control 320’’ receives input from a control interface 334i displayed on the patient display device 334 operated by the patient, the remote control 320’’ transmits the control interface 334i in the form of a web-view portal, i.e., a remote interface that run in a sandbox environment on the patient’s display device 334. A sandbox environment means that it runs on the display device 334 but only displays what is presented from the remote control and can only use a tightly controlled set of commands and resources, such as storageand memory space as well as network access, the ability to inspect the host system and read or write from other input devices connectedto the display device 334 is extremely limited. Any action or command generated by the patient display device is like controlling a webpage. All acting software is located on the remote control that only displays its control interface onto the patient display unit. The computing unit326 is further configured to encrypt the control interface before transmission to the patient display device 334, and encrypt the control commands before transmission to the implanted medical device 100. The computing unit 326 is further configured to transform the received user input into control commands for wireless transmission to the implantable medical device 100. The patient’s display device 334 could for example be a mobile phone, a tablet or a smart watch. In the embodiment shown in fig. 52f and 52fa, the patient’s display device 334 communicates with the remote control 320’’ by means of BT. The control interface 334i in the form of a web-view portal is transmitted from the remote control 320’’ to the patient’s display device 334 over BT. Control commands in the form of inputs from the patient to the control interface 334i is transmitted from the patient’s display device 334 to the remote control 320’’, providing input to the remote control 320’’ equivalent to the input that may be provided using the control buttons 335. The controlcommands created in the patient’s display device 334 is encrypted in the patient’s display device 334 and transmitted to the remote control 320’ using BT or any other communication protocol. The remote control is normally not connected to the DDI or the Internet to increase security. In addition, the remote control 320’’ may in one embodiment have its own private key and in a specific embodiment the remote control 320’’ is activated by the patient’s private key for a certain time period. This may activate the function of the patient’s display device and the remote wed-view display portal supplied by the remote control to the patient’s display device. The patient’s private key is supplied in a patient private key device compromising a smartcard that may be inserted or provided close to the remote control 320’’ to activate a permission to communicate with the implant 100 for a certain time period. The patient’s display device 334 may (in the case of the display device 334 being a mobile phone or tablet) comprise auxiliary radio transmitters for providing auxiliary radio connection, such as Wi-Fi or mobile connectivity (e.g., according to the 3G,4G or 5G standards). The auxiliary radio connection(s) may have to be disconnected to enable communication with the remote control 320’’. Disconnecting the auxiliary radio connections reduces the risk that the integrity of the control interface 334i displayed on the patient’s display device 334 is compromised, or that the control interface 334i displayed on the patient’s display device 334 is remote controlled by an unauthorized device. In alternative embodiments, control commands are generated and encrypted by the patient’s display device and transmitted to the DDI 330. The DDI 330 could either alter the created control commands to commands readable by the remote control 320’’ before further encrypting the control commands for transmission to the remote control 320’’ or could simply add an extra layer of encryption before transmitting the control commands to the remote control 320’’, or could simply act as a router for relaying the control commands from the patients’ display device 334 to the remote control 320’’. It is also conceivable that the DDI 330 adds a layer of end-to-end encryption directed at the implanted medical device 100, such that only the implanted medical device 100 can decrypt the control commands to perform the commands intended by the patient. In the embodiments above, when the patient remote display device 334 is communicating with the DDI, the patient’s display device 334 may be configured to only display and interact with a web-view portal provided by a section of the DDI and it is conceivable that the web-view portal is a view of a back-end provided on the DDI 330, and in such embodiments, the patient interacting with the control interface on the patient’s display device 334 is equivalent to the patient interacting with an area of the DDI 330. The patient’s display device 334 could have a first and second application related to the implanted medical device 100. The firstapplication is the control application displaying the control interface 334i for control of the implanted medical device 100, whereas the second application is a general application for providing the patient with general information of the status of the implanted medical device100 or information from the DDI 330 or HCP, or for providing an interface for the patient to provide general input to the DDI 330 or HCP related to the general wellbeing of the patient, the lifestyle of the patient or related to general input from the patient concerning the function of the implanted medical device 100. The second application, which do not provide input to the remote control 320’’ and/or the implanted medical device 100 thus handles data which is less sensitive. As such, the general application could be configured to function also when all auxiliary radio connections are activated, whereas switching to the control application which handles the more sensitive control commands and communication with the implanted medical device 100 could require that the auxiliary radio connections are temporarily de- activated. It is also conceivable that the control application is a sub-application running within the general application, in which case the activation of the control application as a sub-application in the general application could require the temporary de-activation of auxiliary radio connections. In the embodiment shown in fig.52f, access to the control application requires the use of the optical and/or NFC means of the hardware key 333’ in combination with biometric input to the patient’s display device, whereas accessing the general application only requires biometric input to the patient’s display device and/or a pin code. In the alternative, a two-factor authentication solution, such as a digital key in combination with a pin code could be used for accessing the general application and/or the control application. In general, a hardware key is needed to activate the patient display device 334 for certain time period to control the web-view portal of the remote control 320’’, displaying the control interface 334i for control of the implanted medical device 100. In the embodiments in which the patients display device 334 is configured to only display and interact with a web-view provided by another unit in the system, it is conceivable that the web-view portal is a view of a back-end provided on the DDI 330, and in such embodiments, the patient interacting with the control interface on the patient’s display device is equivalent to the patient interacting with an area of the DDI 330. Moving now to the P-EID 320’’’. The P-EID 320’’’ is an external device used by the patient, patient external device, which communicates with, and charges, the implanted medical device 100. The P-EID 320’’’ can be remotely controlled by the HCP to read information from the implanted medical device 100. The P-EID 320’’’ controls the operation of the implanted medical device 100, control the charging of the medical device 100, and adjusts the settings on the controller 300 of the implanted medical device 100 by changing pre- defined pre-programed steps and/or by the selection of pre-defined parameters within a defined range., e.g. Just as the remote control320’’, the P-EID 320’’’ could be configured to communicate with the implanted medical device 100 using BT or UWB communication or any other proprietary or standard communication method. Since the device may be used for charging the implant, the charging signal and communication could be combined. Just as with the remote control 320’’, it is also conceivable to use a combination of UWB wireless communication and BT for enabling positioning of the P-EID 320’’ as a way to establish that the P-EID 320’’ is at a position which theimplanted medical device 100 and/or patient and/or HCP can acknowledge as being correct, e.g. in the direct proximity to the correctpatient and/or the correct medical device 100. Just as for the remote control 320’’, in embodiments in which a combination of BT and UWB technology is used, the UWB technology may be used for location-based authentication of the P-EID 320’’, whereas the communication and/or data transfer could take place using BT. The P-EID 320’’ comprises a wireless transmitter/transceiver 328 for communication and also comprises a wireless transmitter 325 configured for transferring energy wirelessly, which may be in the form of a magnetic field or any other signal such as electromagnetic, radio, light, sound or any other type of signal to transfer energy wirelessly to a wireless receiver 395 of the implanted medical device 100. The wireless receiver 395 of the implanted medical device 100 is configured to receive the energy in the form of the magnetic field and transform the energy into electric energy for storage in an implanted energy storage unit 40, and/orfor consumption in an energy consuming part of the implanted medical device 100 (such as the operation device, controller 300 etc.). The magnetic field generated in the P-EID 320’’’ and received in the implanted medical device 100 is denoted charging signal. In addition to enabling the wireless transfer of energy from the P-EID 320’’’ to the implanted medical implant 10, the charging signal may also function as a means of communication. E.g., variations in the frequency of the transmission, and/or the amplitude of the signal may be uses as signaling means for enabling communication in one direction, from the P-EID 320’’’ to the implanted medical device 100, or in both directions between the P-EID 320’’’ and the implanted medical device 100. The charging signal in the embodiment shown in fig.52a and 52fa is a signal in therange 10 65kHz or 115 – 140 kHz and the communication follow a proprietary communication signaling protocol, i.e., it is not based on an open standard. In alternative embodiments, BT could be combined with communication using the charging signal, or communication using the charging signal could be combined with an UWB signal. The energy signal could also be used as a carrying signal for the communication signal. Just as for the remote control 320’’, the UWB signal could in some embodiments also be used as a wake-up signal for the controller 300, or for the BT transceiver, such that the BT transceiver in the implanted medical device 100 can be turned off when not in use, which eliminates the risk that the BT is intercepted, or that the controller 300 of the implanted medical device 100 is hacked by meansof BT communication. In the alternative, the charging signal could be used as a wakeup signal for the BT, as the charging signal does not travel very far. Also, as a means of location-based authentication, the effect of the charging signal or the RSSI could be assessed by the controller 300 in the implanted medical device 100 to establish that the transmitter is within a defined range. In the BT/UWB combination, the UWB may be used also for transmission of data. In some embodiments, the UWB and/or the charging signal could be used for the transmission of some portions of the data, such as sensitive portions of the data, or for the transmission keys for unlocking encrypted communication sent by BT. Wake-up could be performed with any other signal. UWB could also be used for waking up the charging signal transmission, to start the wireless transfer of energy or for initiating communication using the charging signal. As the signal for transferring energy has a very high effect in relation to normal radio communication signals, the signal for transferring energy cannot be active all the time, as this signal may be hazardous e.g., by generating heat. The P-EID 320’’’ communicates with the HCP over the Internet by means of a secure communication, such as over a VPN. The communication between the HCP and the P-EID 320’’’ is preferably encrypted. Preferably, the communication is sent via the DDI, which mayonly be relying on the information. The communication from the HCP to the implanted medical device 100 may be performed using an end-to- end encryption, in which case the communication cannot be decrypted by the P-EID 320’’’. In such embodiments, the P-EID 320’’’ acts as a router, only passing on encrypted communication from the HCP to the controller 300 of the implanted medical device 100 (without full decryption). This solution further increases security as the keys for decrypting the information rests only with the HCP and with theimplanted medical device 100, which reduces the risk that an unencrypted signal is intercepted by an unauthorized device. The P-EID 320’’’may add own encryption or information, specifically for security reasons. The P-EID 320’’’ may hold its own private key and may be allowed to communicate with the implant 100 based on confirmation from the patient’s private key, which may be provided as a smartcard to be inserted in a slot of the P-EID 320’’’ or hold in close proximity thereto to be read by the P-EID 320’’’. These two keys will add a high level of security to the performed communication between the Implant 100 and the P-EID 320’’’ since the patient’s hardware key in this example on the smartcard may activate and thereby allow the communication and action taken in relation to the implant. The P-EID 320’’’ may as previously described change the treatment setting of the implant by selecting pre-programmed steps of the treatment possibilities. Such pre-programmed treatment options may include for example to change: at least one of the level and time of stretching and when such stretching occurs in relation to food intake of a patient for an operable implant for stretching the stomach wall of the patient for creating satiety, parameters of an implant able to be programmed from outside the body, parameters of an implant able to be programmed from outside the body with a wireless signal, parameters of an implant adapted to move fluid inside the body of the patient, such as volume, pumping parameters, parameters of an implant configured to sense a parameter related to the patient swallowing, parameters of an implant configured to exercise a muscle with electrical or mechanical stimulation, such as stimulation parameters, amplitude frequency time period etc., When the implanted medical device 100 is to be controlled and/or updated remotely by the HCP, via the P-EID 320’’’, an HCPDedicated Device (DD) 332 displays an interface in which predefined program steps or setting values are presented to the HCP. The HCP provides input to the HCP DD 332 by selecting program steps, altering settings and/or values or by altering the order in which pre-defined program steps is to be executed. The instructions/parameters inputted into the HCP DD 332 for remote operation is in the embodiment shown in fig.52f routed to the P-EID 320’’’ via the DDI 330, which may or may not be able to decrypt/read the instructions. The DDI 330 may store the instructions for a time period to later transfer the instructions in a package of created instructions to the P-EID 320’’’. It is also conceivable that an additional layer of encryption is provided to the package by the DDI 330. The additional layer of encryption may be a layer of encryption to be decrypted by the P-EID 330, or a layer of encryption which may only be decrypted by the controller 300 of the implanted medical device 100, which reduces the risk that unencrypted instructions or packages are intercepted by unauthorized devices. The instructions/parameters are then provided to the P-EID 320’’, which then loads the instructions/parameters into the during the next charging/energy transfer to the implanted medical device 100 using any of the signal transferring means (wireless or conductive) disclosed herein. The Health Care Provider EID (HCP EID) 320’ have the same features as the P- EID 320’’ and can communicate with the implanted medical device 100 in the same alternative ways (and combinations of alternative ways) as the P-EID 320’’’. However, in addition, the HCPEID 320’ also enables the HCP to freely reprogram the controller 300 of the implanted medical device 100, including replacing the entire program code running in the controller 300. The idea is that the HCP EID 320’ always remain with the HCP and as such, all updates to the program code or retrieval of data from the implanted medical device 100 using the HCP EID 320’ is performed with the HCP and patientpresent (i.e., not remote). The physical presence of the HCP is an additional layer of security for these updates which may be critical to the function of the implanted medical device 100. In the embodiment shown in fig.52f and 52fa, the HCP communicates with the HCP EID 320’ using an HCP Dedicated Display Device 332 (HCP DDD), which is an HCP display device comprising a control interface for controlling and communicating with the HCP EID 320’. As the HCP EID 320’ always stays physically at the HCP’s clinic, communication between the HCP EID 320’ and HCP DDD 332 does not have to be sent over the Internet. Instead, the HCP DDD 332 and the HCP EID 320’ can communicate using one or more of BT, a proprietary wireless communication channel, or a wired connection. The alteration to the programming is then sent to the implanted medical device 100 directly via the HCP EID 320’. Inputting into the HCP DDD 332 for direct operation by means of the HCP EID 320’ is the same as inputting directly into the HCP EID 320’, which then directly transfers the instructions into the implanted medical device 100. In the embodiment shown in fig.52f and 52fa, both the patient and the HCP has a combined hardware key 333’,333’’. The combined keys 333’,333’’ comprises a hardware component comprising a unique circuitry (providing the highest level of security), a wireless NFC-transmitter 339 for transmitting a specific code (providing mid-level security), and a printed QR-code 344 for optical recognition of the card (providing the lowest level of security). The HCP private key is supplied by an HCP private key device 333’’ adapted to be provided to the HCP EID external device via at least one of; a reading slot or comparable for the HCP private key device 333’’, an RFID communication or other close distance wireless activation communication to both the HCP EID 320’ and the HCP DDD 332 if used. The HCP DDD 332 will be activated by such HCP private key device 333’’, which for example may comprise at least one of, a smartcard, a key-ring device, a watch an arm or wrist band a neckless or any shape device. The HCP EID external device may comprise at least one of; a reading slot or comparable for the HCP private key device, an RFID communication and other close distance wireless activation communication means The HCP external device 320’ may further comprise at least one wireless transceiver 328 configured for communication with a data infrastructure server, DDI, through a first network protocol. A dedicated data infrastructure server, DDI, is in one embodiment adapted to receive commands from said HCP external device320’ and may be adapted to relay the received commands without opening said commands directed to the patient external device 320’’, the DDI 330 comprising one wireless transceiver configured for communication with said patient external device 320’’. The patient EID external device 320’’ is in one embodiment adapted to receive the commands relayed by the DDI, and furtheradapted to send these commands to the implanted medical device 100, which is adapted to receive commands from the HCP, Health Care Provider, via the DDI 330 to change the pre-programmed treatment steps of the implanted medical device 100. The patient EID is adapted to be activated and authenticated and allowed to perform the commands by the patient providing a patient private key device 333’. Thepatient’s private key device is in one embodiment adapted to be provided to the patient external device by the patient via at least one of; a reading slot or comparable for the patient private key device 333’, an RFID communication or other close distance wireless activation communication. The patient EID external device, in one or more embodiments, comprises at least one of; a reading slot or comparable for the HCP private key device, an RFID communication, or other close distance wireless activation communication The patient EID external device may in one or more embodiments comprise at least one wireless transceiver configured for communication with the implanted medical device through a second network protocol. The patient’s key 333’ is in the embodiment shown in fig.52f and 52fa in the form of a key card having an interface for communicating with the P-EID 320’’’, such that the key card could be inserted into a key card slot in the P-EID 320’’. The NFC-transmitter 339 and/or the printed QR-code 344 can be used as means for accessing the control interface 334i of the display device 334. In addition, the display device 334 may require a pin-code and/or a biometric input, such as face recognition or fingerprint recognition. The HCP’s key 333’’, in the embodiment shown in fig.52f and 52fa is in the form of a key card having an interface for communicating with the HCP-EID 320’, such that in one embodiment the key card could be inserted into a key card slot in the HCP-EID 320’. The NFC-transmitter 339 and/or the printed QR-code 344 can be used as means for accessing the control interface of the HCP DDD 332. In addition, the HCP DDD 332 may require a pin-code and/or a biometric input, such as face recognition or fingerprint recognition. In alternative embodiments, it is however conceivable that the hardware key solution is replaced by a two-factor authentication solution, such as a digital key in combination with a PIN code or a biometric input (such as face recognition and/or fingerprint recognition).The key could also be a software key, holding similar advance key features, such as the Swedish Bank ID being a good example thereof. In the embodiment shown in fig.52f and 52fa, communication over the Internet takes place over a Dedicated Data Infrastructure (DDI) 330, running on a cloud service. The DDI 330 in this case handles communication between the HCP DDD 332 and the P-EID 320’’’. however, the more likely scenario is that the HCP DDD 332 is closed down, such that only the necessary functions of the control application can function on the HCP DDD 332. In the closed down embodiment, the HCP DDD 332 is only able to give the necessary commands to HCP EID 320’ to further update the pre-programmed treatment steps of the Implant 100 via the P-EID 320’’’ in direct contact, or more likely indirect contact via the DDI 332. If the patient is present locally, the HCP EID may communicate and act directly on the patient’s implant. However,before anything is accepted by the implant, a patient private key device 333’ has to be presented to the P EID 320’’’ or HCP EID 320’ for maximum security. The DDI 330 is logging information of the contact between the HCP and the remote control 320’’ via implant feedback data supplied from the implant to P-EID 320’’’. Data generated between the HCP and the patient’s display device 334, as well as between the HCPand auxiliary devices 336 (such as tools for following up the patient’s treatments e.g., a scale in obesity treatment example or a bloodpressure monitor in a blood pressure treatment example) are logged by the DDI 330. In some embodiments, although less likely, the HCP DDD 332 may also handle the communication between the patient’s display device 334 and the remote control 320’’. In fig.52fa, the auxiliary devices 336 is connected to the P-EID as well and can thus provide input from the auxiliary devices 336 to the P-EID which can be used by the P-EID for altering the treatment or for follow up. In all examples, the communication from the HCP to: the P-EID 320’’’, the remote control 320’’, the patient’s display device 334 and the auxiliary devices 336 may be performed using an end-to-end encryption. In embodiments with end-to-end encryption, the communication cannot be decrypted by the DDI 330. In such embodiments, the DDI 330 acts as a router, only passing on encrypted communication from the HCP to various devices. This solution further increases security as the keys for decrypting the information rests only with the HCP and with the device sending or receiving the communication, which reduces the risk that an unencrypted signal is intercepted by an unauthorized device. The P-EID 320’’’ may also only pass on encrypted information. In addition to acting as an intermediary or router for communication, the DDI 330 collects data on the implanted medical device100, on the treatment and on the patient. The data may be collected in an encrypted form, in an anonymized form or in an open form. The form of the collected data may depend on the sensitivity of the data or on the source from which the data is collected. In the embodiment shown in fig.52f and 52fa, the DDI 330 sends a questionnaire to the patient’s display device 334. The questionnaire could comprise questions to the patient related to the general health of the patient, related to the way of life of the patient, or related specifically to the treatment provided by the implanted medical device 100 (such as for example a visual analogue scale for measuring pain). The DDI 330 could compile and/or combine input from several sources and communicate the input to the HCP which could use the provided information to create instructions to the various devices to be sent back over the DDI 330. The data collection performed by the DDI 330 could also be in the form a log to make sure that all communication between the units in the system can be back traced. Logging the communication ensures that all alterations to software or the settings of the software, as well as the frequency and operation of the implanted medical device 100 can be followed. Following the communication enables the DDI 330 or the HCP to follow the treatment and react it something inthe communication indicates that the treatment does not provide the intended results or if something appears to be wrong with any of the components in the system. If patient feedback from the patient display device 334 indicates that a new treatment step of the implant is needed, such information must be confirmed by direct contact between HCP and patient. In the specific embodiment disclosed in fig.52f and 52fa, the wireless connections between the different units are as follows. The wireless connection 411 between the auxiliary device 336 and the DDI 330 is based on WiFi or a mobile telecommunication regime or may be sent to the DDI 330 via the P-EID 320’’’ and the wireless connection 411 between the auxiliary device 336 and the patient’s display device 334 is based on BT or any other communication pathway disclosed herein. The wireless connection 412 between the patient’s display device 334 and the DDI 330 is based on WiFi or a mobile telecommunication regime. The wireless connection 413 between the patient’s display device 334 and the remote control 320’’ is based on BT or any other communication pathway disclosed herein. The wireless connection 414 between the patient remote control 320’’ and the implanted medical device 100 is based on BT and UWB or any other communication pathway disclosed herein. The wireless connection 415 between the remote control 320’’ and the DDI 330 is likely to not be used, and if present be based on WiFi or a mobile telecommunication regime. The wireless connection 416 between the P-EID 320’’’ and the implanted medical device 100 is based on BT, UWB and the charging signal or any other communication or energizing pathway disclosed herein. The wireless connection 417 between the P-EID 320’’’ and the DDI 330 is based on WiFi or a mobile telecommunication regime. The wireless connection 418 between the HCP-EID 320’ and the implanted medical device 100 is based on at least one of the BT, UWB and the charging signal. The wireless connection 419 between the P-EID 320’’’ and the HCP DD 332 is based on BT or any other communication path disclosed herein. The wireless connection 420 between the HPC-EID 320’ and the DDI 330 is based on WiFi or a mobile telecommunication regime. The wireless connection 421 between the HPC DD 332 and the DDI 330 is normally closed and not used and if so based on WiFi or a mobile telecommunication regime. The wireless connection 422 between the HCP-EID 320’ and the HCP DD 332 is based on at least one of BT, UWB, local network or any other communication path disclosed herein. The wireless connections specifically described in the embodiment shown in fig.52f and 52fa may however be replaced or assisted by wireless connections based on radio frequency identification (RFID), near field communication (NFC), Bluetooth, Bluetooth lowenergy (BLE), or wireless local area network (WLAN). The mobile telecommunication regimes may for example be 1G, 2G, 3G, 4G, or 5G. The wireless connections may further be based on modulation techniques such as amplitude modulation (AM), frequency modulation (FM), phase modulation (PM), or quadrature amplitude modulation (QAM). The wireless connection may further feature technologies such as time- division multiple access (TDMA), frequency-division multiple access (FDMA), or code-division multiple access (CDMA). The wireless connection may also be based on infra-red (IR) communication. The wireless connection may feature radio frequencies in the high frequency band (HF), very-high frequency band (VHF), and the ultra-high frequency band (UHF) as well as essentially any other applicable band for electromagnetic wave communication. The wireless connection may also be based on ultrasound communication to name at least one example that does not rely on electromagnetic waves. Fig.52fa also discloses a master private key 333’’’ device that allow issuance of new private key device wherein the HCP or HCP admin have such master private key 333’’’ device adapted to be able to replace and pair a new patient private key 333’ device or HCP private key device 333’’ into the system, through the HCP EID external device 320’. A system configured for changing pre-programmed treatment settings of an implantable medical device, when implanted in a patient, from a distant remote location in relation to the patient, the system comprising: Fig.52fa also discloses a scenario in which at least one health care provider, HCP, external device 320’ is adapted to receive a command from the HCP to change said pre-programmed treatment settings of an implanted medical device 100, further adapted to be activated and authenticated and allowed to perform said command by the HCP providing a HCP private key device 333’’. The HCP EIDexternal device 320’ further comprising at least one wireless transceiver 328 configured for communication with a patient EID external device 320’’’, through a first network protocol. The system comprises the patient EID external device 320’’’, the patient EID external 320’’’ device being adapted to receive command from said HCP external device 320’, and to relay the received command without modifying said command to the implanted medical device 100. The patient EID external device 320’’’ comprising one wireless transceiver 328. The patient EID 320’’’ is adapted to send the command to the implanted medical device 100, to receive a command from the HCP to change said pre- programmed treatment settings of the implanted medical device 100, and further to be activated and authenticated and allowed to perform said command by the patient providing a patient private key 333’ device comprising a patient private key. Although wireless transfer is primarily described in the embodiment disclosed with reference to figs.52f, 52fa the wireless communication between any of the external device may be substituted for wired communication. Also, some or all of the wireless communication between an external device and the implanted medical device 100 may be substituted for conductive communication using a portion of the human body as conductor. Fig.52fb shows a portion of fig.52f, in which some of the components have been omitted to outline a specific scenario. In the scenario outlined in fig.52fb, the system is configured for changing pre-programmed treatment settings of an implantable medical device 100, when implanted in a patient, from a distant remote location in relation to the patient. The system if fig.52fb comprises at least one HCP EID 320’ external device adapted to receive commands from the HCP to change said pre-programmed treatment settings of an implanted medical device 100. The HCP EID 320’ external device is further adapted to be activated and authenticated and allowed to perform said command by the HCP providing a HCP private key device 333’’ adapted to be provided to the HCP EID external device 320’. The private keydevice 333’’ is adapted to be provided to the HCP EID external device 320’ via at least one of: a reading slot or comparable for the HCP private key device 333’’, and an RFID communication or other close distance wireless activation communication. The HCP EID external device 320’ comprises at least one of: a reading slot or comparable for the HCP private key device 333’’, an RFID communication, and other close distance wireless activation communication or electrical direct contact. The HCP EID external device 320’ further comprises at least one wireless transceiver 328 configured for communication with a dedicated data infrastructure server (DDI) 330, through a first networkprotocol. The system further comprises a dedicated data infrastructure server (DDI) 330, adapted to receive command from said HCP EID external device 320’, adapted to relay the received commands without modifying said command to a patient EID external device 320’’’. Thededicated data infrastructure server (DDI) 330 further comprises a wireless transceiver 328 configured for communication with said patient external device. The system further comprises a patient EID external device 320’’’ adapted to receive the command relayed by the dedicated data infrastructure server (DDI) 330 and further adapted to send commands to the implanted medical device 100 and further adapted to receive commands from the HCP EID external device 320’ via the dedicated data infrastructure server (DDI) 330 to change said pre-programmed treatment settings of the implanted medical device 100. The patient EID external device 320’’’, and further adapted to be activated and authenticated and allowed to perform said command by the patient providing a patient private key device 333’ adapted to be provided to the patient EID external device 320’’’ by the patient via at least one of: a reading slot or comparable for the patient private keydevice 333’, an RFID communication or other close distance wireless activation communication or electrical direct contact. The patient EID external device 320’’’ further comprises at least one of: a reading slot or comparable for the HCP private key device, an RFID communication and other close distance wireless activation communication or electrical direct contact. The patient EID external device320’’’ further comprises at least one wireless transceiver 328 configured for communication with the implanted medical device 100 through a second network protocol. The implanted medical device 100 is in turn configured to treat the patient or perform a bodily function. The scenario described with reference to fig.52fb may in alternative embodiments be complemented with additional units orcommunication connections, or combined with any of the scenarios described with reference to figures 52fc – 52fe. Fig.52fc shows a portion of fig.52f, in which some of the components have been omitted to outline a specific scenario. In the scenario outlined in fig.52fc, system configured for changing pre-programmed treatment settings of an implantable medical device 100 is disclosed. The changing pre-programmed treatment settings are performed by a health care provider (HCP) in the physical presence of the patient. The system comprises at least one HCP EID external device 320’ adapted to receive commands from the HCP, directly or indirectly, to change said pre-programmed treatment settings in steps of an implantable medical device 100, when implanted. The HCP EID external device 320’ is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing a HCP private key device 333’’ comprising a HCP private key. The HCP private key device in the embodiment of fig.52fc, comprises at least one of: a smart card, a keyring device, a watch, an arm or wrist band, a necklace, and any shaped device. The HCP EID external device 320’ is adapted to beinvolved in at least one of: receiving information from the implant 100, receiving information from a patient remote external device 336, actuating the implanted medical device 100, changing pre-programmed settings, and updating software of the implantable medical device 100, when implanted. The HCP EID external device 320’ is adapted to be activated, authenticated, and allowed to perform said command also by the patient, the system comprises a patient private key device 333’ comprising a patient private key. The patient private key device 333’comprising at least one of: a smart card, a keyring device, a watch, an arm or wrist band, a necklace, and any shaped device. The HCP private key 333’’ and the patients private key are required for performing said actions by the HCP EID external device 320’ to at least one of: receive information from the implant 100, to receive information from a patient remote external device 336, to actuate the implanted medical device 100, to change pre-programmed settings, and to update software of the implantable medical device 100, when the implantable medical device is implanted. Fig.52c also outlines a scenario in which the system is configured for changing pre-programmed treatment settings in steps of an implantable medical device, when implanted in a patient, by a health care provider, HCP, with the patient on remote on distance, thesystem comprising: at least one HCP EID external device 320’ adapted to receive a command from the HCP direct or indirect, to change said pre-programmed treatment settings in steps of an implantable medical device, when implanted, wherein the HCP EID external device 320’ isfurther adapted to be activated, authenticated, and allowed to perform said command by the HCP. The said action by the HCP EID external device 320’ to change pre-programmed settings in the implant 100 and to update software of the implantable medical device 100, when the implantable medical device 100 is implanted, is adapted to be authenticated by a HCP private key device 333’’ and a patient private key device 333’. The scenario described with reference to fig.52fc may in alternative embodiments be complemented with additional units orcommunication connections, or combined with any of the scenarios described with reference to figures 52fb, or 52fd – 52fe. Fig.52fd shows a portion of fig.52f, in which some of the components have been omitted to outline a specific scenario. In the scenario outlined in fig.52fd, a system configured to change pre-programmed and pre-selected treatment actions of an implantable medical device 100 by command from the patient is described. The system comprises an implantable medical device 100, a patient remote external device 320’’, and a wireless transceiver 328 configured for communication with the implantable medical device 100, when the medical device is implanted, through a second network protocol, The system further comprises a remote display portal interface 334i configured to receive content delivered from the patient remote external device 320’’ to expose buttons to express the will to actuate the functions of the implanted medical device 100 by the patient through the patient remote external device 320’’. The remote external device 320’’ is further configured to present the display portal remotely on a patient display device 334 allowing the patient to actuate the functions of the implanted medical device 100 through the display portal of the patient remote external device 320’’ visualized on the patient display device 334. In fig.52fd, a further wireless connection 423 between the patient remote external device 320’’ and the patient EID external device 320’’’ is provided. This further wireless connection 423 could be a wireless connection according to any one of the wireless signaling methods and protocols described herein, and the communication can be encrypted. Fig.52fd further shows a scenario in which the external system comprises a first external device in the form of the HCP EID external device 320’ and a second external device in the form of patient EID external device 320’’’. The HCP EID external device 320’ and the patient EID external device 320’’’ have a wireless or wired connection 416’ to each other and external system is configured for providing remote instructions to the implantable medical device 100. The HCP EID external device 320’ or the patient EID external device 320’’’ is configured to, derive a checksum from the instructions that will be sent to the implant and electronically sign the instructions and the checksum using at least one of a patient private key device 333’ or a HCP private key device 333’’’. The HCP EID external device 320’ or the patient EID external device 320’’’ is then configured to form a data packet from the instructions, the electronic signature and the checksum. In the embodiment shown in fig.52fd, the patient EID external device 320’’’ comprises a wireless transmitter configured to wirelessly send the data packet to the implantable medical device 100. The HCP EID external device 320’ or the patient EID external device 320’’’ may further be configured encrypt the data packet prior to transmission. If the HCP EID external device 320’ creates and signed the instructions, the patient EID external device 320’’’ may be configured to transmit the data packet wirelessly to the implantable medical device withoutchanging the data packet and/or without full decryption of the data packet. In the embodiment shown in fig.52fd, the patient private key andthe HCP private key are placed on a patient private key device 333’ and a HCP private key device 333’’’. However, the patient private key and the HCP private key may be placed directly on the HCP EID external device 320’ or the patient EID external device 320’’’. Either way, the patient private key and the HCP private key may be placed on the EIDs or the key devices by the manufacturers and may be placed on the EIDs or the key devices in the form of software or hardware. The key may be a non-extractable key. In the example when the HCP EID external device 320’ communicates directly with the patient EID external device 320’’’, the external system is configured to function without connection to the Internet which greatly reduces the risk that the system is hacked. As the system is not connected to the Internet, the system cannot depend on a synchronized time e.g. for time-out of log-in functionality. As such, the external system is configured to communicate with the implantable medical device 100 independently of time. The authentication and verification may thus be based entirely on the possession of keys. In an alternative embodiment, the log-in of signing functionality offered by the key devices 333’’, 333’’’ may be complemented or replaced by an input button on one or both of the HCP EID external device 320’ or the patient EID external device 320’’’, configured to be used for verifying user presence. I.e., a user presses the input button on request from the HCP EID external device 320’ or the patient EID external device 320’’’ and thereby verifies presence. The implantable medical device 100 is in this embodiment configured to receive remote instructions from the external system by a wireless receiver configured to receive wirelessly transmitted data packets from the external system, i.e. the HCP EID external device 320’ or the patient EID external device 320’’’. The implantable medical device 100 is configured to: verify the electronic signature, and use a checksum provided in the data packet to verify the integrity of the instructions. A verification query operation may further be built into the external system or between the external system and the implantable medical device 100. The verification query operation comprising: transmitting, from the HCP EID external device 320’, the patient EID external device 320’’’, or the implantable medical device 100, a query comprising a computational challenge to at least one other of the HCP EID external device 320’, the patient EID external device 320’’’, or the implantable medical device 100 and receiving, at the first or second external devices, a response based on the transmitted computational challenge, and verifying at the HCP EID external device 320’, the patient EID external device 320’’’, or the implantable medical device 100, the received response. The verification query operation may be in the form of a proof of possession operation comprising: receiving a public key, the public key being associated with a private key, transmitting a computational challenge to the first or second key device, based on the public key received from the first or second key device, receiving a response from the first or second key device based on the possession of the private key in the first or second keydevice, and verifying that the response based on the possession of the private key matches the query based on a public key. The verification query operation may also be performed between one of the HCP EID external device 320’ or the patient EID external device 320’’’ and one of the first and second key devices. In an alternative authentication or verification method for providing remote instructions from the external system to theimplantable medical device 100, the implantable medical device comprises a list of codes and the external system comprises a list of codes. The method comprising encrypting the instructions at the external system using a code from a position on the list of codes, wirelessly sending the encrypted instructions to the implantable medical device, and decrypting, at the implantable medical device, the instructions using a code from a position on the list of codes. The same authentication or verification method may be used for authentication or verification or s signature applied to a communication which may comprise at least one instruction. The scenario described with reference to fig.52fd may in alternative embodiments be complemented with additional units or communication connections, or combined with any of the scenarios described with reference to figures 52fb, 52fc, or 52fe. Fig.52fe shows a portion of fig.52fa, in which some of the components have been omitted to outline a specific scenario. In the scenario outlined in fig.52fe, a system configured for providing information from an implantable medical device 100, when implanted in a patient, from a distant remote location in relation to the patient is described. The system comprises at least one patient EID external device 320’’’ adapted to receive information from the implant 100, and adapted to send such information further on to a server or dedicated data infrastructure, DDI, 330. The patient EID external device 320’’’ is further adapted to be activated and authenticated and allowed to receive said information from the implanted medical device 100 by the patient providing a private key, The patient private key device comprises the private key adapted to be provided to the patient EID external device 320’’’ via at least one of; a reading slot or comparable for the patient private key device, an RFID communication or other close distance wireless activation communication or direct electrical connection, The patient EID external device 320’’’ comprises at least one of; a reading slot or comparable for the patient private key device, an RFID communication and other close distance wireless activation communication or direct electrical contact, The patient EID external device320’’’ further comprises at least one wireless transceiver 328 configured for communication with the DDI 330, through a first network protocol. The scenario described with reference to fig.52fe may in alternative embodiments be complemented with additional units orcommunication connections, or combined with any of the scenarios described with reference to figures 52fb – 52fd. Fig.52ff shows a portion of fig.52fa, in which some of the components have been omitted to outline a specific scenario. In the scenario outlined in fig.52ff a system configured for changing pre-programmed treatment settings in steps of an implantable medical device 100, when implanted in a patient, by a health care provider, HCP, either in the physical presence of the patient or remotely with the patient on distance is described. The system comprising at least one HCP EID external device 320’ adapted to receive a command directly or indirectly from the HCP to change said pre-programmed treatment settings in steps of the implantable medical device 100, when implanted, wherein the HCP EID external device 320’ is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing a HCP private key device comprising a HCP private key, comprising at least one of: a smart card, a keyring device, a watch, an arm or wrist band, a necklace, and any shaped device. The system further comprises a patient private key device comprising a patient private key comprising at least one of: a smart card, a keyring device, a watch, an arm or wrist band, a necklace, and any shaped device. Both the HCP and patient private key is required for performing said action by the HCP EID external device 320’ to change the pre- programmed settings in the implant 100 and to update software of the implantable medical device 100, when the implantable medical device 100 is implanted. The patient private key is adapted to activate, be authenticated, and allowed to perform said command provided by the HCP, either via the HCP EID external device or when the action is performed remotely via a patient EID external device 320’. In the embodiment shown in fig.52ff, the communication is routed over the DDI server 330. The scenario described with reference to fig.52ff may in alternative embodiments be complemented with additional units orcommunication connections, or combined with any of the scenarios described with reference to figures 52fb – 52fe. Fig.52fg shows an overview of an embodiment of the system, similar to that described with reference to fig.52fa, the difference being that the HCP EID and the HCP DDD are combined into a single device. Fig.52fh shows an overview of an embodiment of the system, similar to that described with reference to fig.52fa, the difference being that the HCP EID 320’’’ and the HCP DDD 332 are combined into a single device and the P EID 320’’’ and the patient remote control external device 320’’ are combined into a single device. One probable scenario / design of the communication system is for the purpose of changing pre-programmed treatment settings of an implantable medical device, when implanted in a patient, from a distant remote location in relation to the patient. The system comprises at least one health care provider, HCP, external device 320’ adapted to receive a command from the HCP to change said pre-programmed treatment settings of an implanted medical device, further adapted to be activated and authenticated and allowed to perform said command by the HCP providing a HCP private key device 333’’ adapted to be provided to an HCP EID external device via at least one of; a reading slot or comparable for the HCP private key device, a RFID communication or other close distance wireless activation communication. The HCP EID external device comprising at least one of: a reading slot or comparable for the HCP private key device, a RFID communication, and other close distance wireless activation communication or electrical direct contact. The HCP EID external device further comprises at least one wireless transceiver configured for communication with a patient EID external device, through a first network protocol, wherein the system comprises the patient EID external device, the patient EID external device being adapted to receive command from said HCP external device, and to relay the received command without modifying said command to the implanted medical device. The patient EID external device comprising one wireless transceiver configured for communication with said patient external device. The patient EID is adapted to send the command to the implanted medical device, to receive a command from the HCP to change said pre- programmed treatment settings of the implanted medical device, and further to be activated and authenticated and allowed to perform said command by the patient providing a patient private key device comprising a patient private key. In another scenario, the implantable medical device may be configured to transmit information. Such information may, for example, relate to a function of the implantable medical device, a parameter of the body of the patient, measurements, among others. In that scenario, the implantable medical device may be configured to only transmit such data in response to a received authentication. The authentication may be received from the patient EID, or from another external device. The implantable medical device may verify that the authenticated device is authorized to request data, for example through a cryptographic verification, which in some examples is based on a key stored at the implantable medical device. The patient EID (alternatively patient external device) may provide the authentication based on a patient private key provided to the patient EID. The implantable medical device may in that scenario verify that the authentication is based on a patient private key associated with a patient that is authorized to request information from the implant. Based on a valid authorization, the implantable medical device may send data to the patient external device. The data may in some examples be encrypted, for example in any of the ways of encrypting data from the medical implant are described herein. The authorization may be a one-time authorization, an authorization for apredetermined time interval or an authorization that is valid until withdrawn. For example, the authorization may be provided once a day, or at the time of requesting the data from the implantable medical device. While Figs.52F and 52FA-FH and the description thereof discloses different scenarios, also other combinations of authentication or authorization are conceivable. For example, for changing settings of an implantable medical device, it may be required that a health care provider provides an authentication for the changes using their HCP private key. In some examples, an authorization is necessary also from the patient by the patient providing a patient private key device in order for the changes to be accepted by the implantable medical implant. In some examples, the patient may delegate its authorization to the health care provider by using the patient private key. In some cases, when both an authorization from the health care provider and the patient are required, the health care providerand the patient could be in the same location. To provide an authorization showing that both the health care provider and the patient are at the same location, either the HCP external device or the patient external device may be adapted to receive both the patient private key and the HCP private key in order to authorize a command or a change for the implantable medical implant. Alternatively, the HCP external device or the patient external device may be configured to communicate via a short range communications technology to verify that the other device is present and authenticated before sending the changes to the implantable medical device. This added security may be beneficial, forexample, when the medical implant is re-programmed, or software of the implantable medical device is otherwise changed. In other examples, both an authorization from a patient and from a health care provider may be required, but without the requirement that they are at the same location. In those examples, the authorization may be given using their respective external device.This may be beneficial, for example, when making changes to treatment settings or updating a software is considered to be low risk. Different programs comprised in the implantable medical implant may be considered to have a different risk level associated with them. A risk determination may be programmed into the implantable medical implant as conditions for accepting an update. If the implantable medical implant determines that an update fulfils the conditions, it may install it, otherwise, if the implantable medical implant determines that the conditions are not fulfilled, it may reject the update. In some examples, it may be sufficient to only require an authorization from at least one of a health care provider and a patient. For example, changes associated with a lower risk, such as changing pre-programmed settings or treatment settings within pre-determinedranges, may be performed using only one authorization. Although the different scenarios outlined in figures 52fb – 52fh are described with specific units and method of signaling, these scenarios may very well be combined with each other or complemented with additional units or communication connections. As have been discussed before in this application, communication with a medical implant needs to be reliable and secure. For thispurpose, it is desirable to have a standalone device as an external remote control (for example described as 320’’ in figs 52f – 52fh) for the medical implant, such that no other programs or applications run on the same device which may disturb or corrupt the communication tothe medical implant. However, the smartphone or tablet (for example described as 334 in figs 52f – 52fh) has become an integrated part of everyday life for most people. This means that we almost always have our smartphones at hand. For this reason, it would have been convenient for the patient to communicate with the medical implant directly using the smartphone, such that no additional standalone device would have to be carried. However, as a lot of other applications are running on the smartphone, it does not fulfill the requirement of being a secure and reliable communication tool without interference from other communication. It is therefore desirable to split the tasks of providing secure communication between the external device and the implant from the task of communicating with the Internet and providing a familiar and intuitive user interface. For this purpose, and external device providing secure communication and tamperproofsoft- and hardware, where the display device allows for intuitive and easy use is provided. In the embodiments described with reference tofigs. 52g – 52k a device fulfilling these combinatory needs will be described in the form of a standalone remote control external device integrated in a housing unit 320’’ connectable to a smartphone or another display device 334, such as a smart watch or a tablet. Figs.52g shows the housing unit 320’’ in an elevated perspective view form the left, and fig.52h shows the housing unit 320’’ in a plain view from the left. In the embodiment shown in fig.52g, the housing unit 320’’ has a rectangular shape with rounded edges, having aheight 1521 which is more than 1,5 times the width 1522. The housing unit 320’’ comprises recess 1525 configured to receive a display device 334, in the form of a smartphone, configured to be fitted in the housing unit 320’’ for mechanically, disconnectably connecting the display device 334 to the housing unit 320’’. The boundaries of the recess 1525 in the housing unit 320’’ forms an edge 1528 configured to encircle the display device 334, when the display device 334 is inserted into the recess 1525. In the embodiment shown in fig.52g, the recess 1525 has a depth 1526 configured to allow the display device 334 to be entirely inserted into the recess 1525. As such, the depth 1526 of the recess 1525 exceeds the depth 1531 of the display device 334. In the embodiment shown in figs.52g and 52h, the edge is relatively thin, andhas a width 1527 which is in the range 1/8 – 1/100 of the width of the display device 334, as such, the housing unit 320’’ has a width in therange 1,02 – 1,25 times the width 1522 of the housing unit 320’’. In the same way, the housing unit 320’’ has a height 1521 in the range 1,01 –1,25 times the height 1521 of the display device 334. In the embodiment shown in figs.52g – 52h, the edges 1528 are configured to clasp thedisplay device 334 and thereby mechanically fixate the display device 334 in the housing unit 320’’. The minimum bounding box of the housing unit 320’’ and the display device 334 when mechanically connected, is no more than, 10 % wider, 10 % longer or 100 % higher, than the minimum bounding box of the display device 334. For creating a clasping fixation, the edges of the housing unit 320’’ is made from an elastic material crating a tension betweenthe edge 1528 and the display device 334 holding the display device 334 in place. The elastic material could be an elastic polymer material, or a thin sheet of elastic metal. For the purpose of further fixating the display device 334 in the housing unit 320’’, the inner surface of the edges 1528 may optionally comprise a recess or protrusion (not shown) corresponding to a recess or protrusion of the outer surface of the display device 334. The edges 1528 may in the alterative comprise concave portions for creating a snap-lock clasping mechanical fixation between the housing unit 320’’ and the display device 334. In the embodiment shown in figs.52g and 52h, the housing unit 320’’ functions as a remote control for communicating with an implanted medical device, including receiving information from, and providing instructions and updates to, the implanted medical device.Information could be information related to a state of the implanted medical device including any functional parameter of the implanted medical device or could be related to a state of the patient, including any physiological parameter pertaining to the body of the patient (further described on other sections of this disclosure). For the purpose of providing input to the implanted medical device and controllingand updating the functions of the housing unit 320’’, the housing unit 320’’ comprises a control interface comprising switches in the form of control buttons 335. The control buttons 335 are configured to be used when the external device is disconnected from the display device 334. The control interface further comprises a display 1505, which is a smaller and typically less sophisticated display 1505 than the display of the display device 334. In an alternative embodiment, the control buttons 335 and display 1505 are integrated into a single touch- responsive (touchscreen) display on which the control buttons may be displayed. In the embodiment shown in figs.52g and 52h, one of thecontrol buttons 335 is a control button for activating the implanted medical device and another of the control buttons 335 is a control button for deactivating the implanted medical device. When the display device 334 is attached to the housing unit 320’’, the control buttons 335 and the display is covered by the display device 334 and are as such not in an operational state. In the embodiment shown in figs 52g and 52h, the housing unit 320’’ is configured to transmit information pertaining to the display of the user interface to the display device 334 and the display device 334 is configured to receive input pertaining to communication to or from the implantable medical device from thepatient, and transmit signals based on the received input to the housing unit 320’’. The input may be a command to change the operational state of the implantable medical device. The display device 334 comprises a touch screen configured to display the user interface and receive the input from the patient. The display of the display device 334 may comprise one or more OLEDs or IPS LCDs elements. When the display device 334 is connected to the housing unit 320’’, the display device 334 is configured to display a control interface which is used to communicate with the housing unit 320’’, i.e. providing input to and receiving information from the housing unit 320’’. The input provided thehousing unit 320’’ is then relayed to the implanted medical device – and in the same way information communicated from the implanted medical device to the housing unit 320’’ may be relayed or displayed on the display device 334. Having an external device comprising acombination of a housing unit 320’’ comprising the communication means for communicating with the implanted medical device and a display device 334 basically only functioning as and Input/Output device connected to the housing unit 320’’ makes it possible to have a secure communication between the housing unit 320’’ and the display device 334, which is out of reach from the Internet connection of thedisplay device 334, which makes it much harder for an external attacker to get access to any of the vital communication portions of the housing unit 320’’. The communication between the housing unit and the display device 334 is very restricted and the only communicationallowed from the display device 334 to the housing unit 320’’ is input from the patient or a healthcare professional, and authenticationparameters created by an authentication application running on the display device 334. The authentication application running on the display device 334 could be a number-generating authenticator or a biometric authenticator for authenticating the patient or health careprofessional, and the authentication parameters could for example be parameters derived from a facial image or a fingerprint. In the opposite direction, i.e. from the housing unit 320’’ to the display device 334, the communication could be restricted to only communicationneeded for displaying information and/or a graphical user interface on the display device 334. The communication restrictions could for example be based on size of the communication packages or the frequency with which the communication takes place which reduces the risk that an un-authorized person makes multiple attempts to extract information from, or transit information to, the hand-held device. In the embodiment shown with reference to figs.52g and 52h, the housing unit 320’’ comprises a first communication unitproviding a wireless connection 413 to the display device 334. The wireless connection 413 is in the embodiment shown in figs- 52g and 52h based on NFC, but could in alternative embodiment be based on Bluetooth or any other communication pathway disclosed herein. The housing unit 320’’ further comprises a second communication unit providing a wireless connection with the implanted medical device. Thewireless communication between the housing unit 320’’ and the implanted medical device is in the embodiment shown in figs.52g and 52h based on Bluetooth, but could in alternative embodiments be based on NFC or UWB or any other communication pathway disclosed herein. As mentioned, in the embodiment shown in figs.52g and 52h, the wireless communication between the housing unit 320’’ and thedisplay device 334 is based on NFC, while the wireless communication between the housing unit 320’’ and the is based on Bluetooth. As such, the first communication unit of the housing unit 320’’ is configured to communicate wirelessly with the display device 334’ using a first communication frequency and the second communication unit of the housing unit 320’’ is configured to communicate wirelessly with the implantable medical device using a second different communication frequency. For this purpose, the first communication unit of the housing unit 320’’ comprises a first antenna configured for NFC-based wireless communication with the display device 334, and the second communication unit comprises a second antenna configured for Bluetooth-based wireless communication with the implantable medical device. The first and second antennae may be a wire-based antennae or a substrate-based antennae. As such, the first communication unitis configured to communicate wirelessly with the display device 334 on a first frequency and the second communication unit is configured to communicate wirelessly with the implantable medical device using a second different communication frequency. Also, first communication unit of the housing unit 320’ is configured to communicate wirelessly with the display device 334 using a first communication protocol (the NFC-communication protocol), and the second communication unit is configured to communicate wirelessly with the implantable medical device using a second communication protocol (the Bluetooth communication protocol). The first and second communication protocols are different which adds an additional layer of security as security structures could be built into the electronics and/or software enabling the transfer from a first to a second communication protocol. In an alternative embodiment, the second communication unit may be configured to communicate wirelessly with the implantable medical device using electromagnetic waves at a frequency below 100 kHz, or preferably at a frequency below 40 kHz. The second communication unit may thus be configured to communicate with the implantable medical device using “Very Low Frequency” communication (VLF). VLF signals have the ability to penetrate a titanium housing of the implant, such that the electronics of the implantable medical device can be completely encapsulated in a titanium housing. In yet further embodiments, the first and second communication units may be configured to communicate by means of an RFID type protocol, a WLAN type protocol, a BLE type protocol, a 3G/4G/5G type protocol, or a GSM type protocol. In yet other alternative embodiments, it is conceivable that the mechanical connection between the housing unit 320’’ and the display device 334 comprises an electrical connection for creating a wire-based communication channel between the housing unit 320’’ and the display device 334. The electrical connection could also be configured to transfer electric energy from the display device 334 to the housing unit, such that the housing unit 320’’ may be powered or charged by the display device 334. A wired connection is even harder to access for a non-authorized entity than an NFC-based wireless connection, which further increases the security of the communication between the housing unit 320’’ and the display device 334. In the embodiment shown with reference to figs.52g and 52h, the display device 334 comprises a first communication unit providing a wireless connection 413 to the housing unit 320’’ based on NFC. The display device 334 further comprises a second communication unit providing a wireless connection with a further external device and/or with the Internet. The second external device may be far away, for example at a hospital or a place where a medical professional practice. The wireless communication between the display device 334 and a further external device is in the embodiment shown in figs.52g and 52h based on WiFi, but could in alternative embodiments be based on for example Bluetooth. As mentioned, in the embodiment shown in figs.52g and 52h, the wireless communication between the display device 334 and the housing unit 320’’ is based on NFC, while the wireless communication between the display device and a further external unit is based on WiFi.As such, the first communication unit of the display device 334 is configured to communicate wirelessly with the housing unit 320’’ using a first communication frequency and the second communication unit of the display device 334 is configured to communicate wirelessly with a further external device using a second different communication frequency. For this purpose, the first communication unit of the display device 334 comprises a first antenna configured for NFC-based wireless communication with the housing unit 320’’, and the second communication unit comprises a second antenna configured for WiFi-based wireless communication with a further external device. The first and second antennae may be wire-based antennae or substrate-based antennae. As such, the first communication unit is configured tocommunicate wirelessly with the housing unit 320’’ on a first frequency and the second communication unit is configured to communicate wirelessly with the further external device using a second different communication frequency. Also, the first communication unit of the display device 334 is configured to communicate wirelessly with the housing unit 320’’ using a first communication protocol (the NFC communication protocol), and the second communication unit is configured to communicate wirelessly with the further external device using a second communication protocol (the WiFi communication protocol). The first and second communication protocols are different which adds an additional layer of security as security structures could be built into the electronics and/or software enabling the transfer from a first to a second communication protocol. In alternative embodiments, the second communication unit of the display device 334 may be configured to communicate with the further external device by means of, a WLAN type protocol, or a 3G/4G/5G type protocol, or a GSM type protocol. In the embodiment shown in figs. 52g and 52h, the communication range of the first communication unit of the housing unit 320’’ is less than a communication range of the second communication unit of the housing unit 320’, such that the communication distance between the housing unit 320’’ and the medical implant may be longer than the communication distance between the housing unit 320’’ andthe display device 334. In the embodiment shown in figs.52g and 52h, the communication range of the first communication unit may beconstrained to a length that is less than five times the longest dimension of the minimal bounding box of the display device 334, or more precisely constrained to a length that is less than three times the longest dimension of the minimal bounding box of the display device 334. In the embodiment shown in figs.52g and 52h, communication between the housing unit 320’’ and the display device 334 is onlyenabled when the housing unit 320’’ is connected to the display device 334. I.e. at least one of the housing unit 320’’ and the display device 334 is configured to allow communication between the housing unit 320’’ and the display device 334 on the basis of the distance betweenthe housing unit 320’’ and the display device 334. In the alternative, the housing unit 320’’ and/or the display device 334 may comprise a sensor configured to estimate whether the housing unit 320’’ is attached to the display device 334 or not, such as a mechanically activated switch or a photo resistive sensor which providing sensor input when the housing unit 320’’ and display device 334 are mechanically connected to each other. The signal from the at least one sensor then may be used to permit usage of the communication unit configured for communication with the display device 334. In the embodiment shown in figs.52g and 52h, communication between the housing unit 320’’ and the implantable medical device is only enabled on the basis of a distance between the housing unit 320’’ and the implantable medical device. In the embodiment shown infigs. 52g and 52h, the distance should be less than twenty times the longest dimension of the minimal bounding box of the display device, or more specifically less than ten times the longest dimension of the minimal bounding box of the display device. The distance between the housing unit 320’’ and the medical implant may be measured using electromagnetic waves, or acoustic waves. The process of measuring the distance may comprise triangulation. In the embodiment shown in figs.52g and 52h, the second communication unit of the display device 334 need to be disabled to enable communication between the display device 334 and the housing unit 320’’, and further the second communication unit of the display device 334 needs to be disabled to enable communication between the housing unit 320’’ and the medical implant. Also, the second communication unit of the housing unit 320’’ needs to be disabled to enable communication between the housing unit 320’’ and the medical implant. In the embodiment shown in figs. 52g and 52h, the housing unit 320’’ further comprises an encryption unit configured to encrypt communication received from the display device 334 before transmitting the communication to the implanted medical device. The encryption unit may for example be based on one of the following algorithms: AES, Blowfish, DES, Kalyna, Serpent or Twofish. For the purpose for handling the communication, I/O and encryption, the housing unit 320’’ comprises a processor which could be a general-purpose microprocessor and/or an instruction set processor and/or related chips sets and/or special purpose microprocessors such as ASICs (Application Specific Integrated Circuit). The processor also comprise memory for storing instruction and/or data. The housing unit 320’’ may comprise a storage unit, such as a battery, for storing energy. The storage unit may be adapted to be charged by the display device 334, or another external device. In some examples, the charging is performed using reverse wireless charging. To that end, the housing unit 320’’ may comprise an energy receiver connected to the storage unit, the energy receiver being adapted to wirelessly receive energy from another device. The display device 334 may comprise a primary coil and the housing unitcomprise a secondary coil connected to an energy storage of the housing unit, wherein the display device 334 is adapted to wirelessly charge the housing unit using the first coil, and wherein the housing unit is adapted to receive wirelessly transmitted energy through the second coil and store the energy in the storage unit. In one example, the wireless charging may be performed using the Qi standard for wireless charging. Figs. 52i and 52j shows an embodiment of the external unit similar to the embodiment described with reference to figs.52g and 52h. The difference being that in the embodiment of figs.52i and 52j, the housing unit 320’’ does not clasp the display device 334. Instead, the housing unit comprises two magnets 1510 for magnetically fixating the display device 334 to the housing unit 320’’. In alternative embodiments, it is equally conceivable that the external device comprises an intermediate portion, which is fixedly fixated to the housing unit for providing a detachable connection with the display device 334. In the alternative, the intermediate device could be fixedly fixated to the display device 334 and provide a detachable connection with the housing unit 320’’. Fig. 52k shows a system overview of the external device (which could be the external device of the embodiment described with reference to figs 52g and 52h, or of the embodiment described with reference to figs 52i and 52j). The housing unit 320’’ is connected to the display device 334. A wireless connection 413 is provided between the housing unit 320’’ and the display device 334, and a further wireless connection 413 is provided between the housing unit 320’’ and the implanted medical device 100, such that the housing unit can send instructions and updates to the implanted medical device 100, and receive information, parameters (such as sensor values) and alarms from the implanted medical device 100. The communication between the external device and the medical implant 100 is further described in other portions of this disclosure. In some examples shown in any of Figs.52A-52L, the patient remote control or the patient EID may comprise a wireless transceiver for communication with the implant, and a second wireless receiver for communication with a communications network over which the patient remote control or patient EID may communicate with a patient remote control, patient EID, HCP EID or DDI. In some examples, the patient remote control or the patient EID may be wirelessly charged. Thus, the patient remote control or the patient EID may comprise a first coil for receiving wireless energy to be used or stored at the patient remote control or the patient EID. Dual remote controls Fig.52L shows one embodiment of a communication system for transmission of data to and/or from an implantable medical device 100. The communication system comprises an implantable medical implant, a first remote control 320’’, and a second remote control 320’’’’. The first remote control 320’’ (also referred to as patient external device 320’’) is operable by a user and comprises a first wirelesscommunication unit configured for wireless transmission of data to and/or from the implantable medical device 100. The second remote control 320’’’’ is inoperable by a user (i.e. may not comprise any input means such as buttons, switches, or user interface to receive any input directly from a user) and comprises a second wireless communication unit configured for wireless transmission of control commands and/or data to and/or from the implantable medical device 100. The second remote control 320’’’’ further comprises a third communication unit for communicating with a patient display device 334 (e.g. a smartphone, smartwatch, tablet, and/or the like). By having two separate remote controls, the security of the implant may be improved, as there are two separate ways of controlling the implant. Thus, in case of a malfunction of either of the remote controls, the implant may still be controlled. Furthermore, this allows for the second remote control to be smaller or more compact since it is inoperable by the user other than through a patient display device or another external device. The second remote control may thus be smaller and potentially less expensive. The first and second remote controls 320’’, 320’’’’ each comprise a wireless transceiver 328 for communicating with theimplantable medical device 100. The first and/or second remote control 320’’, 320’’’’ is capable of controlling the operation of the implantable medical device 100 via the controller 300 (for controlling the implantable medical device and for communicating with devices external to the body of the patient and/or implantable sensors). The first and/or second remote control 320’’, 320’’’’ may control the operation of the implantable medical device 100 by controlling pre-set functions of the implantable medical device 100, e.g. for operating an active portion of the implantable medical device 100 for performing the intended function of the implantable medical device 100. The first and/or second remote control 320’’, 320’’’’ is able to communicate with implantable medical device 100 using any standard or proprietary protocol designed for the purpose. At least one of the first remote control 320’’, the second remote control 320’’’’, and the implantable medical device 100 may, e.g., comprise a Bluetooth (BT) transceiver. In particular, the wireless transceiver 328 may comprise a BT transceiver, and the and/or second remote control 320’’, 320’’’’ may be configured to communicate with implantable medical device 100 using BT. In one embodiment, the first and/or second remote control 320’’, 320’’’’ is configured to communicate with implantable medical device 100 using NFMI. In an alternative configuration, the first and/or second remote control 320’’, 320’’’’ may communicate with the implantable medical device 100 using a combination of Ultra-Wide Band (UWB) wireless communication, NFMI and/or BT. For example, at least one of first remote control 320’’, the second remote control 320’’’’, and the implantable medical device 100 may comprise a UWB transceiver. The use of UWB technology enables positioning of the first and/or second remote control 320’’, 320’’’’ which can be used by the implantable medical device 100 as a way to establish that the first and/or second remote control 320’’, 320’’’’ is at a position which the implantable medical device 100 and/or the patient can acknowledge as being correct, e.g. in the direct proximity to the medical device 100 and/or thepatient, such as within reach of the patient and/or within 1 or 2 meters of the implantable medical device 100. When a combination of BT and UWB and/or NFMI technology is used, the UWB or NFMI technology may be used for location-based authentication of the first and/or second remote control 320’’, 320’’’’, whereas the communication and/or data transfer could take place using BT or any other way of communicating different from the UWB or NFMI. The UWB or NFMI signal could in some embodiments also be used as a wake-up signal for the controller 300, or for the BT transceiver, such that the BT transceiver in the implantable medical device 100 can be turned off when not in use, which eliminates the risk that the BT is intercepted, or that the controller 300 of the implantable medical device 100 is hacked by means of BT communication. In embodiments in which a BT (or alternatives) / UWB combination is used, the UWB connection may be used also for the transmission of data. In the alternative, the UWB connection could be used for the transmission of some portions of the data, such as sensitive portions of the data, or for the transmission of keys for the unlocking of encrypted communication sent over BT. The first remote control 320’’ may be configured to control functions of the implantable medical device 100 based on user input to the first remote control 320’’. In particular, the first remote control 320’’ may comprise an input device for receiving a first user input, wherein the first remote control 320’’ is configured to transmit the first user input to the implantable medical device 100. The first remote control 320’’ may comprise a computing unit 326 which runs a software application for communicating with the implantable medical device 100. The computing unit 326 may receive the first user input directly from control buttons 335 arranged on the first remote control 320’’. The computing unit 326 may be configured to encrypt control commands before transmission to the implantable medical device 100. The computing unit 326 is further configured to transform the received first user input into control commands for wireless transmission to the implantable medical device 100. The second remote control 320’’’’ may comprise a wireless transmitter 325 configured for transferring energy wirelessly. The energy may be in the form of a magnetic field or any other signal such as electromagnetic, radio, light, sound or any other type of signal totransfer energy wirelessly to a wireless receiver 395 of the implantable medical device 100. The wireless receiver 395 of the implantable medical device 100 is configured to receive the energy in the form of the magnetic field and transform the energy into electric energy for storage in an implantable energy storage unit 40 of the implantable medical device 100, and/or for consumption in an energy consuming part of the implantable medical device 100 (such as the operation device, controller 300 etc.). In other words, the implantable energy storage unit 40 may be adapted to be wirelessly charged. The first remote control may similarly comprise a wireless transmitter fortransferring energy wirelessly to the implantable medical implant. The implantable energy storage unit 40 may particularly be connected to the wireless receiver 395 for receiving wireless energy from the first and/or second remote control 320’’, 320’’’’. In the embodiment shown in fig.52L, the second remote control 320’’’’ is configured to communicate with a patient display device 334. Here, the patient display device 334 comprises the consumer electronics device. In particular, the second remote control 320’’’’ is configured to receive a second user input from the patient display device 334 and to transmit the second user input to the implantable medical implant. The second remote control 320’’’’ may receive the second user input from a control interface 334i displayed on the patient display device 334 operated by the patient. The patient display device 334 may for example be a mobile phone, a tablet or a smart watch. The display device 334 may, for example, communicate with the second remote control 320’’’’ by means of BT, but any wireless or wired communication means may be used. The control interface 334i, e.g. in the form of a web-view portal, may be transmitted from the second remote control 320’’’’ to the patient display device 334 over BT. Control commands in the form of inputs from the patient to the control interface 334i are transmitted from the patient display device 334 to the second remote control 320’’’’, providing input to the second remote control 320’’’’ equivalent to the inputthat may be provided using the control buttons 335or other input means of the first remote control 320’’. The control commands created in the patient display device 334 may be encrypted in the patient display device 334 and transmitted to the second remote control 320’’’’ using BT or any other communication protocol. The second remote control 320’’’’ may be implemented and/or integrated in an accessory to the patient display device 334. The second remote control 320’’’’ may, e.g., form part of a mobile phone case (i.e. smartphone case) for a mobile phone. Alternatively, the second remote control 320’’’’ may be integrated in a case for a personal computer, or a body worn camera, or any other suitable type ofexternal device as described herein. The case may for example be connected to the patient display device 334 (e.g. mobile phone) using a wire from the case and connected to the patient display device (e.g. a charging port). The second remote control 320’’’’ may not be connected to the DDI or the Internet, thereby increasing security. The secondremote control 320’’’’ may have a private key, in particular the second remote control 320’’’’ may be activated by a private key 333’ of the patient for a certain time period. This may activate the function of the patient display device 334 and the remote wed-view display portal supplied by the second remote control to the patient display device 334. The patient’s private key 333’ may be supplied in a patient private key device comprising a smartcard that may be inserted orprovided close to the first remote control 320’’ and/or close to the second remote control 320’’’’ to activate a permission to communicate with the implantable medical device 100 for a certain time period. The patient’s private key 333’ is in the embodiment shown in fig.52L in theform of a key card having an interface for communicating with the first remote control 320’’, the second remote control 320’’’’, and/or another device or control. The NFC-transmitter 339 and/or the printed QR-code 344 may be used as means for accessing the control interface 334i of the display device 334. In addition, the display device 334 may require a pin-code and/or a biometric input, such as face recognition or fingerprint recognition, for controlling the implantable medical implant. The patient display device 334 may comprise auxiliary radio transmitters for providing auxiliary radio connection, such as Wi-Fi or mobile connectivity (e.g. according to the 3G, 4G or 5G standards). The auxiliary radio connection(s) may have to be disconnected to enable communication with the second remote control 320’’’’. Disconnecting the auxiliary radio connections reduces the risk that the integrity of the control interface 334i displayed on the patient display device 334 is compromised, or that the control interface 334i displayed on the patient’s display device 334 is remote controlled by an unauthorized device. The data transmitted in the communication system may comprises a control command for the medical implant. Hence, real-time, remote management of patient care is provided and settings of the medical implant may be adjusted, e.g., based on the patient’s current health status. Thus, invasive procedures may be averted while efficiency of healthcare delivery and patient comfort may be improved. Furthermore, more responsive and/or personalized healthcare may be provided, as adjustments can be made promptly in response to changes in the patient’s condition. At least one of the first wireless communication unit of the first remote control 320’’ and the second wireless communication unit of the second remote control 320’’’’ may be configured to send and/or receive data using near-field magnetic induction (NFMI). Thus, enhanced security and reliability of the communication system may be provided. NFMI creates a private, secure communication link that is difficult to intercept or disrupt due to the magnetic field being spatially confined and thus less susceptible to interference compared to traditional radio frequency communication. Furthermore, NFMI penetrate materials such as water and body tissue, making it particularly suitable for communication with medical implants. Further, at least one of the first wireless communication unit and the second wireless communication unit may comprise a transmitter coil for modulating a magnetic field for transmitting the data. In turn, the implantable medical implant may comprise a receiving coil and an NFMI receiver connected to the receiving coil to receive the data. The transmitter coil(s), in conjunction with the receiving coil and NFMI receiver of the implantable medical implant, may provide efficient and reliable data transfer. The use of a magnetic field for data transmission, which is typically more energy-efficient than traditional radio frequency communication, may additionally reduce power consumption and thereby extend an operational period of the implantable medical implant. The transmitter coil(s) may be configured to modulate a magnetic field, and the NFMI receiver may be adapted to measure the magnetic field in the receiving coil. A modulated magnetic field may enable the construction of specific signal patterns for the data transmission such that transmission of complex data sets is enabled. At least one of the first wireless communication unit and the second wireless communication unit may further be configured towirelessly charge the implantable medical implant using NFMI. In particular, at least one of the first wireless communication unit and the second wireless communication unit may be, and/or act as, the wireless transmitter 325 configured for transferring energy wirelessly Similarly, the implantable medical implant may comprise a coil for receiving wireless energy for charging the implant via NFMI. The coil of the implantable medical implant may, e.g., form part of, or be, the wireless receiver 395. The second and third communication units of the second control unit 320’’’’ may be configured to transmit and/or receive data using different network protocols. In other words, the second and third communication units may be designed to send and/or receive data using separate and/or alternate networking standards. Thus, the communication system can communicate across a variety of network environments and conditions. A multi-protocol support may enhance interoperability of the second remote control 320’’’’, allowing for communicate with a wide range of devices and systems (such as the patient display device 334 and the implantable medical device 100). Alternatively, or additionally, the second and third communication units may for the same reasons be configured to transmit and/or receive data using different frequency bands. The standard, communication, and/or network protocols discussed herein may be any one or more from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. In an example, the second communication unit has a longer effective range than the third communication unit. In other words, the second communication unit may be able to communicate with a device (e.g., the implantable medical device 100) from a further distancethan the distance at which the third communication unit is able to communicate with another device (e.g., the patient display device 334). For example, the second communication unit may use a network protocol with a longer effective range than the network protocol of the third communication unit. In the specific embodiment disclosed in fig.52L, the wireless connections between the different units are as follows. The wireless connection 413 between the patient display device 334 and the second remote control 320’’’’ is based on BT or any other communicationprotocol disclosed herein. The wireless connection 414 between the second remote control 320’’’’ and the implantable medical device 100 is based on BT and UWB or any other communication protocol disclosed herein. The wireless connection 416 between the first remote control 320’’ and the implantable medical device 100 is based on BT, UWB, and the charging signal, or any other communication or energizing pathway disclosed herein. The wireless connections specifically described in the embodiment shown in fig.52L may be replaced or assisted by wireless connections based on radio frequency identification (RFID), near field communication (NFC), Bluetooth, Bluetooth low energy (BLE), or wireless local area network (WLAN). The wireless connections may further be based on modulation techniques such as amplitude modulation (AM), frequency modulation (FM), phase modulation (PM), or quadrature amplitude modulation (QAM). The wireless connection may further feature technologies such as time-division multiple access (TDMA), frequency-division multiple access (FDMA), or code-division multiple access (CDMA). The wireless connection may also be based on infra-red (IR) communication. The wireless connection may feature radio frequencies in the high frequency band (HF), very-high frequency band (VHF), and the ultra-high frequency band (UHF) as well as essentially any other applicable band for electromagnetic wave communication. The wireless connection may also be based on ultrasoundcommunication to name at least one example that does not rely on electromagnetic waves. An embodiment in which the second remote control 320’’’’ is comprised in a housing is shown in Fig.52LL. Voice control Fig.52M schematically shows a medical implant 10 when implanted in a patient 1. The medical implant comprises a processor 1300 connected to a medical device 100, which may be comprised in the implant 100. The medical device may be any medical device or implantdiscussed herein, and may be configured to control or monitor a function of the body of a patient. The medical implant 10 may furthercomprise or be connected to a microphone 1369. The microphone 1369 may receive audio and transfer that audio to the processor 1300. The processor 1300 may thus receive audio via microphone 369. The processor 1300 may have two modes of operation, a learning mode for learning voice commands and an operational mode for recognizing and transmitting voice commands to the medical device 110 or the medical implant 1100. The processor 1300 may be configured to, when in the learning mode, receive a first audio training phrase and creating a transfer function, the transfer function being based on the first audio training phrase, wherein the transfer function is configured to adjust the amplitude of at least one frequency of audio received at the medical device 110 for enhancing audio received at the medical implant 100 to facilitate detection of voice commands. To this end, the processor 1300 may comprise a transfer function unit 1370. The processor 1300 may be further adapted to receive a second audio training phrase, the second audio training phrase comprising a voice command, wherein the voice command comprises an instruction forthe control of the medical implant 1100 and/or the medical device 110. The processor 300 may be further configured to use the transfer function for generating an enhanced second audio training phrase in the medical implant, and associating the enhanced second audio training phrase with the instruction for the control of the medical implant. Thus, the medical implant 110 has learned that the voice command comprised in the enhanced audio training phrase corresponds to the instruction. In some examples, the audio training phrases are inputted into a transfer function unit 1370 for creating the transfer function. The processor may further comprise a learning unit 1371 for associating the enhanced second audio training phrase with the instruction for the control of the medical implant. The learning unit 1371 may, for example, comprise an algorithm based on machine learning for learning toassociate the enhanced audio training phrase with the correct instruction for the medical device 1100. The voice commands, the instructionsand any association between the voice commands may be stored in a memory unit 1373 comprised in or connected to the processor 1300. The processor 1300 may be further adapted to receive audio input, process the audio input in order to determine an instructionand to transfer that instruction to the medical device 1100. In order to determine the instruction, the processor may use the transfer function 1370 to enhance the audio input and then determine the instruction associated with the enhanced audio input (as associated by the method described herein). The instruction may also be called a control command or a command. The instruction may be determined by and/or be transferred to the medical device 1100 via a command unit 1372 comprised in or connected to the processor 1300. The instructionmay relate to a function of the medical device 1100 and may cause the medical device 1100 to perform an action, or it may relate to any other function of the medical implant 10, such as the processor 1300. By learning voice commands, it may be meant that the processor associates an audio input with a control command for the medical device. The processor 1300 may be further configured to, when in the operational mode, receive an audio command phrase for the medical device 1100 or implant 110. The processor 1300 may be further configured to apply a transfer function to create an enhanced audio command phrase. The transfer function may have been created as discussed above. The processor 1300 may determine a corresponding command for the medical based on the enhance audio command phrase, and send the command to the medical device 1100 or the medical implant 110. The medical device 1100 or implant 110 may then execute the command. When the medical implant is implanted in the body, typically the medical implant stays in the same place in the body. Thus, it has been realized that any noise or distortion created by the body to audio commands may be substantially the same. By creating a transfer function based on a first audio training phase when the medical implant is implanted in the body, any noise created by the body or anydistortions to the audio training phase caused by the body itself can be accounted for. The method thus accounts for that that the noise and distortions created by the body is substantially the same over time. Thus, the transfer function may account for those disturbances when enhancing any audio received by the medical implant. In this way, audio received by the medical implant may be enhanced, i.e., any known disturbances created by the body to the audio may be accounted for, before the medical implant does any further processing. Since the audio is enhanced before any training or processing, the process of recognizing which command for the medical implant the audio relates to may be simplified. That is, the processing power needed for recognizing voice commands may be reduced, which is advantageous in medical implants since the size of the implant may be decreased. Fig.52n shows a flow chart for a method for training a medical implant to recognize a voice command, according to some embodiments. The method 200 comprises receiving 210, by a medical implant, a first audio training phrase, when the medical implant is implanted in the body of the patient. The method further comprises creating 220 a transfer function, the transfer function being based on the first audio training phrase, wherein the transfer function is configured to adjust the amplitude of at least one frequency of audio received at the medical device for enhancing audio received at the medical implant to facilitate detection of voice commands. Creating 220 a transfer function based on a first audio input phase when the implant has been implanted in a patient allows for specifically correcting the audio input phrase for noise and/or distortion caused by the patient’s body specifically. The creation of the transfer function may be based on training a machine learning model. A purpose of the transfer function may be to adjust the audio input for distortions or noise specific to the body the implant has been implanted into. After the audio input has been adjusted, or enhanced, the audio input may be in a better condition for use in later stepsof the method, such as for recognizing a command for the medical implant comprised in the audio input. In that way, there may be a two- step method for training the medical implant to recognize commands. Since the audio input has been adjusted or enhanced, the voice recognition of the command in the audio input may be easier, which may allow for using less processing power. In some embodiments, the creating 220 a transfer function may further comprise to compare 221 the first audio training phrase with a stored audio phrase to determine a difference between them. Based on the difference, the transfer function may be created 222. Inother words, the method may comprise creating a transfer function based on a difference between a stored audio phrase and the first audio phrase. As an illustrative example only, the stored audio phrase may comprise a specific command or test phrase. When in a training session, a user of the implant or another person that the implant should be trained for, may speak the same specific command or test phrase. The command or test phrase may then be captured by the microphone of the implant, and transferred to the learning unit of theprocessor. The learning unit may then compare the received command or test phrase with the stored command or test phrase, and then, based on the difference(s), create a transfer function which takes the differences into account. The differences between the receivedcommand or test phrase and the stored command or test phrase may be indicative of a noise or distortion created by the body in which the implant has been implanted. The method 200 may further comprise inputting 230 a second audio training phrase to the medical implant, the second audio training phrase comprising the voice command, the voice command comprising an instruction for the control of the medical implant. The second audio training phrase may be used as input to the transfer function in order to create an enhanced audio training phrase. In this way, any noise or distortion created by the body may be alleviated by the transfer function, thus resulting in an enhanced audio training phrase. Thus, the method may further comprise using 240 the transfer function for generating an enhanced second audio training phrase in the medical implant. The enhanced audio training phrase may then be associated 250 with the instruction for the control of the medical implant. That is, the method may comprise training a command unit to associate the second audio training phrase to a command for the medical device. The training may comprise training a machine learning model to associate enhanced audio training phrases with commands for the medical implant. By first creating a transfer function, any following audio input may be enhanced by using the transfer function, and thus the associating of a second audio training phrase with a command may be simpler, i.e. less computationally intense, as the quality of the enhanced audio may be better that the originally audio received by the microphone of the implant. The method also allows for avoiding training the medical implant on distorted audio or audio with a lot of noise, thus improving the quality of the training. Fig.52o shows a flow chart for a method 300 for using voice commands to control a medical implant, according to some embodiments. In some examples, the voice commands have been learnt with the method described with reference to Figs.52m and 52n. The method 300 comprises receiving 310 an audio command phrase for the medical device. The method further comprisesapplying 320 a transfer function to create an enhanced audio command phrase. The method may further comprise to determine 320 a corresponding command for the medical based on the enhance audio command phrase, and send 340 the command to the medical device. The medical device may then execute 350 the command. By running the audio command phrase through the transfer function, the audio quality of the audio command phrase may be improved, thus allowing for aneasier recognition of the corresponding command. This may make the recognition or determination of the command for the medical device less computationally intensive. Controlling energy transfer at the implant Any of the implantable medical implants described herein are configured to wirelessly receive energy for powering or charging the implantable medical implant. When transferring energy to an implantable medical implant it is important to adequately control theenergy transfer. If the energy transferred or received at the medical implant is excessive, it may harm the patient. For example, if the position of external device relative to the receiving unit changes during energy transfer, the energy transferred may also increase or decrease drastically. This situation could cause severe problems since the implant cannot "consume" the suddenly very high amount of supplied energy. Unused excessive energy must be absorbed in some way, resulting in the generation of heat, which is highly undesirable asit may harm the patient. Hence, if excessive energy is transferred from external device the receiving unit, the temperature of the implantwill increase, which may damage the surrounding tissue or otherwise have a negative effect on body functions. It is therefore highly desirable to always supply the right amount of energy to an implanted medical device during operation. Similarly, if too much energy is received by the implant, there may be temperature increases which may harm the patient. It has thus been realized that controlling the energy transfer at the medical implant may be advantageous. An embodiment of a system for transferring energy to an implantable medical device will now be described with reference to Figs.52 A-C. Alternatively, “transferring energy” may be referred to as “charging”. A corresponding a method for wireless energy transfer from an external energy source located outside the patient to an internal energy receiver 305 located inside the patient is also provided. The system comprises an external energy source, or a charger, and an internal energy receiver 305. The external energy source may be comprised in any of the external devices, i.e. devices arranged outside of the body of a patient, described herein. The internal energyreceiver 305 is connected to an implantable medical device 300 for supplying received energy thereto. Internal energy receiver 305 may be configured to determine an accumulated amount of received energy; determine a current change in the received energy, determine acontrol signal reflecting the accumulated received energy and the change in the received energy, and controlling the energy transfer based on the control signal. As an alternative, the determination of the control signal may be omitted, and the controlling may be performed based on the accumulated amount of energy and the current change. By “controlling the energy transfer” it may be meant or include adjusting the energy transfer efficiency, controlling switches affecting the energy transfer, controlling a part of the internal energy receiver, controlling a part of the external energy source, turning the energy transfer off completely, or any other way of affecting the energy transfer. In one embodiment the external energy source or the internal energy receiver 305 may comprise an energy transfer controller for controlling the energy transfer. The energy transfer controller may be configured to determine the rate of change of the received energy and/or the accumulated amount of received energy, and adjust the energy transfer based on the determined parameters. Advantageously, the energy transfer may be controlled or adjusted by the internal energy receiver 305, as the internal energy receiver 305 is capable of directly determining how much energy is received in the internal energy receiver and faster determine if there is a risk to the patient or the medical implant. Thus, the internal energy receiver 305 may be configured to determine an accumulated amount of transferred energy is determined by the internal energy receiver 305. The internal energy receiver 305 may alternatively or in combination, be configured to determine a current change in the energy transfer. Further, the internal energy receiver 305 may be configured to determine a control signal for controlling the energy transfer. The control signal may be used in the internal energy receiver 305 for adjusting the receiving of energy, or it may be transmitted to the external energy source, and the external energy source may be configured to adjust the transmitted energy based on the control signal. That is, the controlling of the energy transfer may be performed by the internal energy receiver 305. In some examples, the controlling of the energy transfer may be performed by the external energy source. In some examples, the internal energy receiver 305 is configured to measure, via a measuring unit, an accumulated energy received a period of time and/or to measure a current change in energy received, and to control the energy received based on the accumulated energy and/or the current change. In some examples, this may be performed using a PID regulator, which will be described in the following. In some examples, the controller comprised in the internal energy receiver comprises a PID regulator. Such a PID regulator may be used to control the difference between a received voltage and a desired voltage level. The PID regulator may control a switch to signal to selectively de-tune the receiving coil of the internal energy receiver. Alternatively, or in combination, the PID may regulate the switch to modulate the power signal. The PID regulator may respond quickly to changes in the power levels and provides increased control over the pulse width modulation of the power signal. A PID regulator may be used for controlling any energy transfer as discussed herein. Pulse width modulation (PWM) In some embodiments, the energy is supplied from the primary coil to the secondary coil using energy pulses. The pulses areachieved using modulation techniques. For example, modulation (PWMT – Pulse width modulation technique) of the pulses may be created with a system that controls the power using a continuous square wave pulse signal with a constant frequency where the duty cycle of thepulses is varied or a system that controls power using a continuous square wave pulse train signal with both constant frequency andconstant pulse with and thereby adjusting the duty cycle width of the train of pulses. The PWMT may be used to digitally vary the amount ofpower from the power amplifier that drives the transmitting coil. Thus, the amount of energy transferred from the primary coil to the secondary coil may be controlled. In some examples, the energy is supplied using a pulse pattern. In those examples, the receiving unit 305 may be configured to receive transcutaneously transferred energy in pulses according to a pulse pattern, and the measurement unit may be configured to measure a parameter related to the pulse pattern. In some examples, the controller is configured to control the energy received (for example by a variable impedance or via switches as described below) in response to the pulse pattern deviating from a predefined pulse pattern. In some examples, the energy transmitted may be varied by varying the width of the energy pulses and having constant frequency and constant amplitude. The pulse width is achieved with a modulation technique, (hereafter PWMT) (in the preferred embodiment many times per second), to control the amount of energy transferred from the external energy transmitting coil in the system to the implantedreceiver. The PWMT is used to digitally vary the amount of power from a power amplifier that drives the transmitting coil. There are several different ways to achieve the PWMT to control the amount of output energy from the power amplifier to the transmitting coil. Generally, modulation of the pulse width may be created with a system that controls the power using a continuous square wave pulse signal with a constant frequency where the duty cycle of the pulses are varied or a system that controls power using a continuous square wave pulse train signal with both constant frequency and a constant pulse width and thereby adjusting the duty cycle width of the train of pulses. These two basic techniques as well as most modifications of them can be used to control the output power of the transmitting coil. The transmission of wireless energy from the external energy transmitting device may be controlled by applying to the external energy transmitting device electrical pulses from a first electric circuit to transmit the wireless energy, the electrical pulses having leading and trailing edges, varying the lengths of first time intervals between successive leading and trailing edges of the electrical pulses and/or the lengths of second time intervals between successive trailing and leading edges of the electrical pulses, and transmitting wirelessenergy, the transmitted energy generated from the electrical pulses having a varied power, the varying of the power depending on the lengths of the first and/or second time intervals. Advantageously, the PWM embodiments described herein may be combined with any embodiment relating to controlling energy transfer to an implantable medica device, variable impedance, resonant circuit, NFMI, large coil, or any other implantable medical device being in any way configured to receive energy wirelessly, as described herein. Variable impedance According to one embodiment described with reference to fig. 52A – 52C, the controller 300 of the implantable system 10 comprises a receiving unit 305 or energy receiver 305 comprising a coil 192 (specifically shown in fig.52B’) configured for receiving transcutaneously transferred energy. The receiving unit 305 further comprises a measurement unit 194 configured to measure a parameter related to the energy received by the coil 192 and a variable impedance 193 electrically connected to the coil 192. The receiving unit 305 further comprises a switch 195a placed between the variable impedance 193 and the coil 192 for switching off the electrical connection between the variable impedance 193 and the coil 192. The controller 300 is configured to control the variable impedance 193 for varying the impedance and thereby tune the coil 192 based on the measured parameter. The controller 300 is further configured to control the switch 195a for switching off the electrical connection between the variable impedance 193 and the coil 192 in response to the measured parameter exceeding a threshold value. As such, the coil can be tuned or switched off to reduce the amount of received energy if the amount of received energy becomes excessive. The controller 300 may further be configured to vary the variable impedance in response to the measured parameter exceeding a threshold value. By varying the variable impedance, the tuning of the coil may be varied, thus affecting the resonant frequency of the receiving coil. In this way, the efficiency of the reception of energy may be varied. The measurement unit 194 is configured to measure a parameter related to the energy received by the coil 192 over a time period and/or measure a parameter related to a change in energy received by the coil 192 by for example measure the derivative of the receivedenergy over time. The variable impedance 193 is in the embodiment shown in fig. 52B’ placed in series with the coil 192. In alternative embodiments it is however conceivable that the variable impedance is placed parallel to the coil 192. The first switch 195a is placed at a first end portion 192a of the coil 192, and the receiving unit 305 further comprises a second switch 195b placed at a second end portion of the coil 192, such that the coil 192 can be completely disconnected from other portions of the implantable system 10. The receiving unit 305 is configured to receive transcutaneously transferred energy in pulses according to a pulse pattern. The measurement unit 194 is in the embodiment shown in fig.52B’ configured to measure a parameter related to the pulse pattern. The controller 300 is configured to control the variable impedance in response to the pulse pattern deviating from a predefined pulse pattern. The controller 300 is configured to control the switch 195a for switching off the electrical connection between the variableimpedance 193 and the coil 192 in response to the pulse pattern deviating from a predefined pulse pattern. The measurement unit is configured to measure a temperature in the implantable system 10 or in the body of the patient, and the controller 300 is configured to control the first and second switch 195a,195b in response to the measured temperature. The variable impedance 193 may comprise a resistor and a capacitor and/or a resistor and an inductor and/or an inductor and acapacitor. The variable impedance 193 may comprise a digitally tuned capacitor or a digital potentiometer. The variable impedance 193 may comprise a variable inductor. The first and second switch comprises a semiconductor, such as a MOSFET. The variation of the impedance is configured to lower the active power that is received by the receiving unit. As can be seen in fig.52B’, the variable impedance 193, the first and second switch 195a,195b and the measurement unit 194 are connected to the communication unit/controller 300 and the receiving unit 305 is connected to an energy storage unit 40 such that the energy storage unit 40 can store energy received by the receiving unit 305. Resonant circuit Figure 52P schematically illustrates a system 500 comprising an external unit 510 and an implantable medical device 505. The external unit 510 is adapted to be arranged outside of a body. The implantable medical device 505 is adapted to be implanted into a body of a patient. The external unit 510 comprises a transmitting circuit 512, a transmitting coil 514 and electrical connections 502. The electrical connections 502 electrically connect the transmitting circuit 512 with the transmitting coil 514. The electrical connections 502 may, for example, be wires or any electrically conducting material, or they may be wireless electrical connections. The electrical connections 502 may have intrinsic electrical resistance. The implantable medical device 505 comprises an energy consuming part 528. The implantable medical device 505 further comprises receiving units 530 for receiving transcutaneously transferred energy, wherein the receiving unit 530 is configured to transfer the received energy to the energy consuming part 528. In figure 52P, three receiving units 530 are illustrated. However, the medical device 505 may comprise any number of receiving units 530. The medical device 505 preferably comprises two or more receiving units 530. Each receiving unit 530 comprises a receiving circuit 522, an impedance unit 526 and a receiving coil, or coil, 524, and electrical connections 502. The electrical connections 502 in the receiving unit 530 electrically connect the receiving circuit 522 to the impedance unit 526 and to the coil 524. Electrical connections 502 electrically connect the receiving unit 530 to the energy consuming part 528. The receiving unit530 may be directly connected to the energy consuming part 528. The receiving unit 530 may be connected to intermediate circuits, wherein the intermediate circuits are connected to the energy consuming part 528. The intermediate circuits may process the output from the receiving unit 530 and prepare it for the energy consuming part 528. The intermediate circuit may comprise amplifiers, switches, filtering, modulators, other signal transformers, or a combination thereof. In figure 52P, the impedance units 526 are connected in parallel to the coil 524. The impedance units 526 and the respective coil 524 may instead be connected in series, partially in series and partially in parallel, or in any other way. I figure 52P, the impedance units 526 are capacitors. The impedance unit 526 may consist of inductors, capacitors, capacitors and resistances, inductors and resistances, or a mixture thereof. The impedance unit 526 may have a variable impedance. The implantable medical device may further comprise a measurement unit 521 and a controller 520. The measurement unit 521 may be configured to measure a parameter related to energy transfer from the external unit 510 to the implantable medical device 505. The controller 520 may be configured to control the subcutaneously received energy to the energy consuming part 528. The controller 520 may be configured to control the subcutaneously received energy based on the parameter measured by the measurement unit 521. The controller 520 may control the impedance units 526. The controller 520 may control a variable impedance of the impedance unit 526. The implantable medical device 505 and the external unit 510 are electrically coupled. The transmitting circuit 512 generates an alternating current in the transmitting coil 514. The alternating current of the transmitting coil 514 induces a current in the coil(s) 524. The receiving unit 530 is configured to receive transcutaneously transferred energy from the external unit 505 via the coil 524. One external unit 510 may transfer energy to many receiving units 530 having a respective coil 524. The inductance of the coil 524 and the impedance of the corresponding impedance unit 526 contributes to a resonance frequency of the receiving unit 530. The inductance of the coils 524 and/or the impedance of the corresponding impedance unit 526 may differ in size between the respective receiving units 530. This may cause receiving units 530 to have different resonance frequencies in relation to each other. A variable impedance of the impedance unit 526 may allow the resonance frequencies of the receiving unit 530 to be tuned. Thecontroller 520 may be able to tune the resonance frequency of each of the receiving units 530 individually by controlling the respective impedance unit 526. The receiving unit 530 may transfer different amounts of energy to the energy consuming device 528 depending on the frequency of an alternating magnetic field generated by the external device 510 and the resonance frequency of the receiving unit 530. Byhaving different resonance frequencies for receiving units 530, a better energy transfer efficiency of the implantable medical device 505 may be obtained. Each receiving unit 530 may be designed to, or be fined tuned to, have the resonance frequency adapted to differentfrequencies of the external unit 510. By having different resonance frequencies of the receiving units 530, different external units 510 may be used, which is illustrated in figure 52Q. Figure 52Q schematically illustrates a system 540 comprising a second external unit 511 and an implantable medical device 545. The second external unit 511 comprises several transmitting units 509, wherein each transmitting unit 509 is similar to the external unit 510 illustrated in figure 52P, described above. The implantable medical device 545 illustrated in figure 52Q comprises an energy consuming part 528 and receiving units 530. The energy consuming part 528 of figure 52Q is similar to the energy consuming part 528 of figure 52P, described above. The receiving units 530 of figure 52Q are similar to the receiving units 530 of figure 52P, described above. The implantable medical device 545 of figure 52Q may further comprise a measurement unit and/or a controller similar to the measurement unit 521 and the controller 520 of figure 52P, described above. Figure 52Q illustrates an implantable medical device 545 comprising two receiving units 530. As mentioned above, there may be any number of receiving units 530 in the implantable medical device 545. As mentioned above, the receiving units 530 are connected to the energy consuming part 528, directly or via an intermediate circuit. The receiving units 530 are adapted to receive transcutaneously transferred energy from the external device 511. The external device 511 is adapted to transmit energy to the receiving unit 530 via the transmitting units 509 in the external device 511. The external unit 511 of figure 52Q illustrates several transmitting units 509. The transmitting units 509 may all be comprised in one device, in separate devices, or a combination thereof. Each transmitting unit 509 may be adapted to send energy on a separate frequency. The transmitting units 509 illustrated in figure 52Q may be configured to transmit different frequencies. A transmitting unit 509 may be comprised in any external device or remote control described herein, a charging device, such as a smartphone, a qi charger, wireless charging pad, any device comprising a coil configured to send out energy, or any device configured to produce an oscillating amagnetic field. Each receiving unit 530 may be adapted to receive energy from a different transmitting unit 509 by having its resonance frequency configured to match the frequency of the transmitting unit 509. The transmitting units 509 could transmit sequentially, simultaneously, or have one or more transmissions partially overlap. An advantage of multiple transmitting units 509 is that a better energy transfer efficiency of the implantable medical device 545may be obtained. Each receiving unit 530 may be tuned to receive energy of a specific frequency of a corresponding transmitting unit 509, so that the receiving units 530 could be charged by their respective transmitting unit 509. Each receiving unit 530 may receive a respective transmitted energy sequentially, simultaneously, and/or independently of the other receiving units 530. An advantageous transmitted energy for a receiving unit 530 may be energy with the frequency of the resonance frequency of the respective receiving unit 530, energy with a frequency within a symmetric or nonsymmetric range around the resonance frequency of the respective receiving unit 530, or energy with a frequency that is at an offset from the resonance frequency of the respective receiving unit 530. Each receiving unit 530 comprises a coil 524 and a resonance frequency. The resonance frequency is a function of the coil 524.Instead of a coil 524 and one resonance frequency, a part of a coil 524 may contribute to a resonance frequency, meaning that a coil 524 may have several resonance frequencies. This is illustrated in figure 52R. Figure 52R schematically illustrates an implantable medical device 565. The implantable medical device 565 is adapted to be implanted into a body of a patient. The implantable medical device 565 comprises an energy consuming part 528, similar to the energyconsuming parts of figure 52R and 52Q, described above. The implantable medical device 565 of figure 52R may further comprise a measurement unit and/or a controller similar to the measurement unit 521 and the controller 520 of figure 52P, described above. The medical device 565 may be configured to receive energy from an external unit, such as the external unit 510 of figure 52P and/or the external unit 511 of figure 52Q. The implantable medical device 565 further comprises a receiving unit 535 for receiving transcutaneously transferred energy, wherein the receiving unit 535 is configured to transfer the received energy to the energy consuming part 528. The receiving unit 535comprises a receiving circuit 523. The receiving unit 535 comprises a receiver coil, wherein the receiver coil comprises a coil with one ormore center taps, a multitude of coils in parallel, or a combination thereof. Center taps do not have to be positioned in the center of a coil. Parts of a receiver coil are coil portions 525. The receiving unit 535 of figure 52R further comprises impedance units 526, similar to the impedance units 526 of figure 52P, described above. The receiving unit 535 of figure 52R further comprises electrical connections 502, similar to the electrical connections 502 of figure 52P, described above. The electrical connections 502 connect the receiving unit 535 to the energy consuming part 528. As mentioned for the receiving unit 530 of figure 52P, the receiving unit 535 of figure 52R may be connected directly to the energy consuming part 528 or connected first to intermediate circuits, wherein the intermediate circuits are connected to the energy consuming part 528. Intermediate circuits may be the same as described for figure 52P above. The electrical connections 502 in the receiving unit 535 connect the receiving circuit 523 to the impedance units 526 and the coilportions 525 so that each impedance unit 526 is connected to a respective coil portion 525. The impedance unit 526 and the respective coil portions 525 form a receiving portion. The receiving portions may be seen as akin to the receiving units 530 of figure 52P, described above. Figure 52R illustrates each impedance unit 526 being connected in parallel to the respective coil portion 525. The impedance unit 526 maybe connected in series, or partially in series and partially in parallel, with the respective coil portion 525. The receiving circuit 523 is connected in parallel to the impedance unit 526. The receiving circuit 523 may be connected in parallel to a portion of the impedance unit 526. The receiving circuit 523 may be connected in series with the entire, or a portion of the, impedance unit 526. The inductance of the coil portion 525 and the impedance of the corresponding impedance unit 526 contribute to a resonance frequency of the corresponding receiving portion. The inductance of the coil portions 525 and/or the impedance of the corresponding impedance unit 526 may differ in size between the respective receiving portions. This may cause receiving portions to have different resonance frequencies in relation to each other. A variable impedance of the impedance unit 526 may be individually controlled by a controller to change the resonance frequencies of the respective receiving portions. Each receiving portion may transfer different amounts of energy to the energy consuming device 528 depending on the resonance frequency of the receiving portion and the frequency of the transcutaneous transferred energy. By having different resonance frequencies of the receiving portions, a better energy transfer efficiency of the implantable medical device 565 may be obtained. Consecutive, sequential, or independent charging may be performed, where each receiving portion receives energy of different frequencies. Each receiving portion may have a resonance frequency adapted to different transcutaneously transferred energy frequencies, from one or more external units. Advantages of having coil portions 525 include that it may reduce the required amount of coils and the amount of material needed. Figure 52R illustrates sequential coil portions 525, where the coil portions 525 are adjacent but not overlapping. Coil portions 525 may overlap, be separate, or be partially overlapping segments of the receiving coil. This is illustrated in figure 52S. Figure 52S illustrates an implantable medical device 575. The implantable medical device 575 comprises an energy consuming part 528, a receiving circuit 523, and impedance units 526, similar to the energy consuming part 528, receiving circuit 523, and impedance units 526 of figure 52R, respectively. The implantable medical device of figure 52S may further comprise a measurement unit and/or a controller similar to the measurement unit 521 and the controller 520 of figure 52P, described above. Similar to the receiving unit 530 of figure 52P, the receiving unit 575 of figure 52S may be connected directly to the energy consuming part 528 or connected first to intermediate circuits, wherein the intermediate circuits are connected to the energy consuming part 528. Intermediate circuits may be the same as described for figure 52P above. The medical device 575 of figure 52S may be configured to receive energy from an external unit, such as the external unit 510 of figure 52P and/or the external unit 511 of figure 52Q. The implantable medical device 575 further comprises coil portions 525, similar to the coil portions 525 of figure 52R, described above. Figure 52S illustrates coil portions 525 that are overlapping with each other. Each coil portion 525 is connected to the respective impedance unit 526, as mentioned for the coil portions 525 and the impedance units 526 of figure 52R. An advantage of having overlappingcoil portions 525 is that shorter or fewer coils may be used. Overlapping coil portions allow for larger inductances of the coil portions for a set receiver coil. Overlapping coil portions allows for a better energy transfer efficiency. Figure 52T illustrates an implantable medical device 585. The implantable medical device 585 comprises an energy consuming part 528, similar to the energy consuming part 528 of any of figures 52P-52S. The implantable medical device 585 of figure 52T further comprise a first receiving unit 530, similar to the receiving unit 530 of figures 52P and 52Q. The implantable medical device 585 of figure 52T further comprise a second receiving unit 535, similar to the receiving unit 535 of any of figures 52R and 52S. The first receiving unit 530 and the second receiving unit 535 are electrically connected to the energy consuming part 528 by electrical connections 502. As mentioned for the receiving unit 530 of figure 52P, the receiving unit 585 of figure 52T may be connected directly to the energy consumingpart 528 or connected first to intermediate circuits, wherein the intermediate circuits are connected to the energy consuming part 528. Intermediate circuits may be the same as described for figure 52P above. Figure 52T illustrates a implantable medical device 585 comprising one first receiving unit 530 and one second receiving unit 535. The implantable medical device 585 may comprise more than one first receiving unit 530. The implantable medical device 585 maycomprise more than one second receiving unit 535. A mix of first receiving units 530 and second receiving units 535 may allow theimplantable medical device 585 to be compact and customizable. The implantable medical device 585 may comprise more than one second receiving unit 535 and no first receiving units 530. The implantable medical device 585 of figure 52T may further comprise a measurement unit and/or a controller similar to themeasurement unit 521 and the controller 520 of figure 52P. The medical device 585 may be configured to receive energy from an external unit, such as the external unit 510 of figure 52P and/or the external unit 511 of figure 52Q. In some examples, a coil comprised in the receiving unit 530 may comprise a plurality of windings. The plurality of windings maybe connected to a respective variable impedance (as described above). An internal controller may control each of the variable impedances individually, thus providing for adjusting the resonant frequency of each of the windings separately. For examples, the secondary coil may comprise a first and a second winding, each connected to a respective variable impedance. Large coil A system for wirelessly charging an implantable medical implant, when implanted in a body of a patient is provided. The system comprises an internal energy receiver comprising a secondary coil, the internal energy receiver being connected to the implantable medical implant and an external energy transmitter comprising a primary coil for wirelessly transmitting energy to the internal energy receiver via the secondary coil. The diameter of the primary coil is larger than a diameter of the secondary coil. According to embodiments described with reference to fig. 52A – 52C, the controller 300 of the implantable system 10 comprises a receiving unit 305 or internal energy receiver 305 comprising a secondary coil 192 (specifically shown in fig.52B’) configured for receiving transcutaneously transferred energy. The implantable system may receive the energy from an external device (also called an external energy transmitter), the external device being arranged outside of the body of the patient. The external device may comprise a primary coil for inducing a current in the coil 192 of the energy receiver 304 for wirelessly transfer energy to the receiving unit 305. According to some embodiments, the primary coil is larger than the coil 192. By having the primary coil being larger than the secondary coil 192, the energy transmission may be improved. By having a diameter of the primary coil being larger than a diameter of the secondary coil, the wireless charging may be improved. For example, in previous wireless charging solution, there is a need for a great precision of arrangement of the secondary coil in relation to the primary coil. By having a larger diameter of the secondary coil, the need for precision may be reduced. Furthermore, having a larger primary coil wirelessly transmitting energy to a small secondary coil may provide for an improved energy transfer efficiency. The implantable medical device may further comprise an internal controller connected to the internal energy receiver, forcontrolling the amount of energy received by the internal energy receiver. In some examples, the internal energy receiver furthercomprises a measurement unit for measuring a parameter related to the implantable medical implant or the body of the patient. The controller may be configured to measure the accumulated energy received by the internal energy receiver over a period of time and to measure a current change in energy received, and to control the energy received based on the accumulated energy and the current change.In some examples, the controlled comprises a Proportional – Integral – Derivative, PID, regulator for controlling the received energy. The implantable medical device may comprise a variable impedance and/or a switch as described above.With regards to the primary coil, the diameter of the primary coil may be more than 0.5 cm, more than 10 cm, more than 15 cm, more than 20 cm, more than 30 cm, or more than 50 cm. Alternatively, or in combination, the area of the primary coil is more than 0.5 cm2, more than 2 cm2, more than 10 cm2, more than 100 cm2, more than 300 cm2, more than 500 cm2, or more than 800 cm2. Advantageously, any of the embodiments relating to wireless charging, for example, controlling energy transfer, PID regulation, variable impedance, large coil, and emergency backup function, among others, may be combined with any embodiment related to energy transfer described herein, for example Aspects 432, 433, 434, for an increased energy transfer safety mechanism. Emergency backup function Another risk associated with an energized implantable medical device is that the implantable medical device’s battery or energy storage is depleted and thus unable to energize the implantable medical device. Further, there is a risk that the internal energy receiver malfunctions, also resulting in a malfunction of the powering of the implantable medical device. Thus, there is provided a safety mechanism that may be advantageously combined with any embodiment or aspect relating to an energized implantable medical implant described herein. Fig.52V shows a schematic illustration of an implantable medical device 100. The implantable medical device 100 may have anactive portion 112 and an internal energy receiver 395. The active portion 112 may, for example, be configured to treat, monitor or perform afunction of a body of a patient. The implantable medical implant 100 may comprise or be connected to a backup system 113, the backupsystem 113 being adapted to perform a backup function related to the active portion 112 of the implantable medical device 100. In some examples, the backup function relates to switching a function of the active portion 112 off. The backup function may be any function relating to the function of the active portion, such as, but not limited to: opening an artificial sphincter, stopping a stretching astomach portion, or stopping a stimulation of tissue. In some examples, the backup system is configured to reverse a function of the medical devices. For example, if the implanted medical device is used to constrict the urethra of a patient having urinary incontinence, the user must naturally be capable of opening said constriction, in order to perform urination, even if the implantable medical device 100 is malfunctioning. The backup system 113 may, for example, comprise a backup energy receiver 114 to receive energy from an external device (such as any of the external devices or remote controls described herein), or to perform a function of the active portion. The backup energy receiver 114 may be adapted to receive wirelessly transferred energy from an external device (which may also be referred to as an external energy transmitter). To this end, the backup energy receiver may comprise a second secondary coil for receiving such energy. For example,in a case where the implantable medical device 100 malfunctions, an external device may wirelessly transfer energy to the backup energy receiver. The backup energy receiver 114 may receive the wirelessly transferred energy and the received energy may be used by the backup system 113 to perform the backup function. In some examples, the function of the backup system 113 is to transfer the energy received via the backup energy receiver 114 forpowering the medical device 100, or it may be used to charge a battery or accumulator of the medical device 100. In some examples, the backup system 113 may use a battery or energy storage used by the active portion 112. The backup function may be triggered by an external device 320’’’. The external device may be any external device or remote control as described herein. The external device 320’’’ may be adapted to wirelessly transfer energy to the backup system, and/or be configured to trigger the backup function of the backup system 113. The backup function may thus comprise an backup internal communications unit 115 for receiving a command from the external device, and be configured to execute the received command. In some examples, the backup function may be triggered by an error detected by a measuring unit or a controller comprised inthe medical implant. Such an error may, for example, be detected by a pressure being too high or too low, a temperature being too high or low, a battery charge status being too low, a measurement value deviating from a predetermined interval, or something else. In other examples, a malfunction of the implantable medical device 100 may relate to the programming of the implantable medical device. In that case, the backup function of the backup system may be to re-program the malfunctioning program of the implantable medical device 100. The re-programming may be performed using any of the methods described herein. In some examples, the backup energy receiver 114 comprises a passive or active RFID circuit adapted to be powered by the external device. In some examples, the backup energy receiver 114 comprises an NFMI energy receiver adapted to receive energy from the external device. The backup energy receiver 114 and the backup internal communication unit 115 may in some examples be comprised in the same unit, for example, in the cases where energy transmission and wireless communication may be performed using the same hardware. NFMI communication and wireless energy transfer Any one of the medical devices described herein which utilize wireless communication in any way may be comprised in a system for communicating information from or to an implantable medical device, wherein the implantable medical device is implanted in a body of apatient. The system may comprise an internal communications unit comprised in or connected to the implantable medical device, and an external communications unit, wherein the internal communications unit and the external communications units are configured to send or receive data using near-field magnetic induction. NFMI is a short-range wireless technology that communicates using a tightly coupled magnetic field. By the term NFMI it may be meant a short range wireless physical layer using low-power and non-propagating magnetic field. NFMI systems are designed to contain transmission energy within the localized magnetic field, and the magnetic field energy resonates around the communication system, but does not radiate into free space. The power density of near-field transmissions is restrictive and attenuates or rolls off at a rate proportional to the inverse of the range to the sixth power (1/r6) or 60 dB per decade. Thus, NFMI in the typical use only has a reach of around 1.5 to 2 meters. NFMI signal can penetrate through human body tissue with low absorption rate. For example, the specific absorption rate (SAR) may be 100 times lower than Bluetooth. It has been realized that NFMI has a communication range through body tissue of for example 50 cm, which thus makes it advantageous to use for medical implants, as compared to RF communication which is disturbed by passing though body tissue. Thus, NFMI allows for communication with implants implanted also implanted deeper in the body. Since NFMI has such a short rage, the possibility of an adversary to eavesdrop on communication with an implant, or to hack an implant form a distance is greatly reduced, as any adversary must be very close to the implant. Fig.52U shows an example of a system 600 using NFMI communication between an external communications unit 601 and an implantable medical device 603. The communications unit 602 is configured to communicate with the implantable medical device 603 through the skin 624 of the patient using NFMI communication. The implantable medical device comprises an internal communications unit 610 (which may alternatively be referred to as a receiving unit 305 in other embodiments) and an active portion 612. The active portion 612 may be configured to monitor, treat or perform a function of a body of a patient, and may be any medical device or medical implant described herein. The communications unit 601 may be comprised in any external device described herein. The external communications unit 601 comprises an external coil 604 connected to an external NFMI transceiver 606. The external NFMI transceiver 606 which may comprise an NFMI transmitter chip. The external coil 604 and the external NFMI transceiver are configured to modulate a magnetic field for sending data and/or energy to the implantable medical device 603. The external NFMI may further comprise a capacitor for tuning. In turn, the internal communications unit 610 may comprise an internal coil 614 and an internal NFMI transceiver 616. To receivedata, the magnetic field modulated by the external coil 604 induces a voltage on the internal coil 614, which may be measured by the internal NFMI transceiver 616 and be decoded at the internal NFMI transceiver or at another part of the implantable medical device 603. The NFMI transceiver 616 may comprise an NFMI receiver chip. The NFMI receiver chip may comprise a tunable resistor and capacitor tank. Both of the tunable capacitance and resistance may vary within a certain range to automatically compensate the detuning of NFMI antennas. It will be appreciated that a similar method may be used for sending data from the implantable medical device via the internal communications unit 616 to the communications unit 601 via the external communications unit 606. In that examples, the internal communications unit may comprise an NFMI transmitter chip similar to the NFMI transmitter chip comprised in the external device, and theexternal NFMI transceiver may comprise an NFMI receiver chip similar to the NFMI receiver chip comprised in the internal NFMI transceiver, connected to a respective coil for transmitting and/or receiving data. Modulation schemes such as amplitude modulation, phase modulation and frequency modulation typically used in RF communications may be used in NFMI communication. In some embodiments, the active portion is not a pacemaker, hearing aid or a neurostimulation implant. The internal communications unit is adapted to be implanted at a tissue depth of at least 8 or 10 cm. For example, the internal communications unit may be adapted to be implanted in an abdomen of a patient. Thus, any internal wireless communication unit comprised in an implant described herein may use NFMI to communicate with an external device. For example, for transmitting data, receiving data, receiving new programming or changes to the software of the implant and/or receiving control commands. The short rage of NFMI and the tissue depth at which NFMI may be used, makes it advantageous to use for any communication between an external device, such as a patient EID 320’’, a patient remote device 320’’’, a HCP EID, a HCP remote device, and an implantable medica device. While the communications security between an implant and an external device is improved by the use of NFMI (as compared to RF communication), the information security may advantageously be combined with any encryption, data integrity checks or the like described herein. For example, the internal communications unit may be configured to encrypt any data to be transmitted to the external communications unit, and the external communications unit may be configured to receive the data transmitted from the internal communications unit. In some examples, the external communications unit may be further configured to transmit that data to a server. In a more specific example, NFMI may be used for wireless communication between an implant and a patient external interrogation device, patient EID, as described herein. In some examples the external communications unit is configured to transmit a control command to the internal communications unit, and the internal communications unit is configured to transmit the control command to the implantable medical device. The control command may cause the implantable medical device to perform an action. The internal communications unit may, for example, be configured to transmit data, the data relating to a function of the implantable medical device or a measurement obtained by the implant. The magnetic field may in addition to or as an alternative be used for charging or powering the medical implant. The use of NFMI for changing is an alternative or addition to any wireless charging of a medical implant described herein. In those cases, the internal communications unit is configured to store the received energy in a battery or similar, or to directly forward the received energy to the active portion 612 or another energy consuming part of the implantable medical device 603. Using NFMI for charging a medical implant also has the advantage, compared to previous methods of charging an implant, that it is not heavily affected by passing through body tissue. For example, with the use of NFMI for charging, an implant at a tissue depth of 8 and up to 13 cm or more may be charged. This allows for practically charging an implant in almost any part of a body. Advantageously, the NFMI communication system disclosed herein may be combined with any of aspects 250, 252, 255 and 284, and any of the embodiments described herein relating to wireless energy transfer using a coil. According to one example, the system further comprises a second internal communications unit and a second external communications unit, wherein the second internal communications unit is adapted to receive and transmit data using a short range communications technology, and the second external communications unit is adapted to receive and transmit data using a short range communications technology, the short range communications technology having a shorter maximum range than NFMI. In one example, the short range communications technology is NFC, and the second internal communication unit comprises an NFC transceiver and the second external communication unit comprises an interrogation device for transmitting data to and from the RFID transceiver. By having these second internal and external communications unit, the implant may require a second authentication based on that the external communication unit is close to the implant, for example close enough to interrogate the NCF transceiver. Thus, it may be verified that the second external communication device is indeed close to the patient’s body.
ASPECTS In the following, numbered aspect groups 473–476 , of the present inventive concept are provided. The different aspects are numbered individually within the groups and the references to other aspects relate to aspects within the same group. The scope of protection is however defined by the appended claims.ASPECT 473A – Stimulation_Vibration_Appetite_Invaginated Device1. A system for treating obesity in a patient, comprising an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomachand/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by thetissue of the stomach wall or the intestine wall.2. The system according to claim 1, wherein said implantable vibration device comprises a wireless energy receiver (R) configured to receive wireless energy.3. The system according to aspect 1 or 2, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall using stomach-to-stomach sutures or staplers.4. The system according to aspect 3, wherein the system comprises the stomach-to-stomach sutures or staplers.5. The system according to any one of the preceding aspect, wherein the implantable vibration device is configured to abut the tissue of the stomach wall on the outside thereof.6. The system according to any one of aspect 1–5, wherein the implantable vibration device is configured to abut the tissue of the intestine wall on the outside thereof.7. The system according to aspect any one of the preceding aspects, wherein the implantable vibration device is configured tovibrate at a frequency in the range of 1–150 Hz, such as in the range of 35–150 Hz.8. The system according to aspect any one of the preceding aspects, wherein the implantable vibration device is configured to vibrate at a the implantable vibration device is configured to vibrate with a period of 0.01–1 seconds, such as of 0.05–1 seconds.9. The system according to aspect any one of the preceding aspects, wherein the implantable vibration device is configured to vibrate at an amplitude such that the tissue in the stomach/intestine wall is displaced at least 1 mm.10. The system according to any one of the preceding aspects, wherein the implantable vibration device comprises a vibrationgenerating unit (VGU) capable of causing the implantable vibration device to vibrate.11. The system according to aspect 10, wherein the vibration generating unit (VGU) is comprises a motor having an offset shaft.12. The system according to aspect 10 or 11, wherein the vibration generating unit (VGU) comprises at least one piezoelectric material configured to generate vibrations in the vibration device.13. The implantable vibration device to aspect 12, wherein the piezoelectric material is a ceramic piezoelectric material.14. The implantable vibration device according to aspect 13, wherein the piezoelectric material is lead zirconate titanate, PZT.15. The implantable vibration device according to aspect 13, wherein the piezoelectric material is barium titanate.16. The implantable vibration device according to aspect 13, wherein the piezoelectric material is lead titanate.17. The implantable vibration device according to aspect 12, wherein the piezoelectric material is a polymeric piezoelectric material.18. The implantable vibration device according to aspect 17 wherein the polymeric piezoelectric material is polyvinylidene fluoride, PVDF.19. The implantable vibration device according to any one of aspects 12–18, wherein the piezoelectric material is comprised in a piezoelectric motor.20. The implantable vibration device according to aspect 19, wherein the piezoelectric motor is a piezoelectric inchworm motor.21. The implantable vibration device according to aspect 19, wherein the piezoelectric motor is a piezoelectric inertial motor.22. The medical device according to aspect 21, wherein the piezoelectric motor is a piezoelectric walk-drive motor.23. The medical device according to any one of aspects 20 – 22, wherein the piezoelectric motor is a linear piezoelectric motor.24. The medical device according to aspect 23, wherein the vibration generating unit is attached to the casing, so that vibrations generated by the vibration generating unit can travel to the casing.25. The medical device according to any one of aspects 19 – 22, wherein the piezoelectric motor is a rotational piezoelectric motor.26. The medical device according to aspect 25, wherein the vibration generating unit further comprises an weight configured to be eccentrically rotated by the rotational piezoelectric motor.27. The system according to any one of the preceding aspects, further comprising a further implantable vibration device 110’ configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient.28. The system according to any on the preceding aspects, further comprising a casing adapted to contain the implantable vibration device.29. The system according to aspect 2, or any one of the aspects 3–27, when dependent on claim 2, wherein the system further comprises an implantable wireless energy transmitter (T), wherein wireless energy transmitter is configured to wirelessly transfer energy to the implantable vibration device.30. The system according to aspect 29, wherein the wireless energy transmitter is configured to be implanted in a different, remote position in the body of the patient than the implantable vibration device.31. The system according to any one of aspects 29 or 30, wherein the wireless energy receiver (R) of the implantable vibration device includes a secondary coil, and wherein the wireless energy transmitter (T) comprises a primary coil configured to induce a voltage inthe secondary coil of the vibration device (110). 32. The system according to any one aspects 2 or 3–31, when dependent on claim 2, wherein the wireless energy receiver (R) is configured to receive the energy via RFID pulses.33. The system according to aspect 32, comprising a feedback unit configured to provide feedback pertaining to an amount of energy received by the wireless energy receiver (R) via the RFID pulses, the system being configured to adjust an amount of energy based on the feedback.34. The system according to any one of the preceding aspects, wherein the implantable vibration device comprises a rechargeable energy storage unit (E) for temporarily storing at least part of the wirelessly received energy.35. The system according to any one of the preceding aspects, wherein the implantable vibration device (110) comprises an internal controller (CI).36. The system of aspect 35, wherein the internal controller (CI) is configured to wirelessly receive vibration control data for controlling the vibration of the implantable vibration device.37. The system according to aspect 36, when dependent on claim 2, wherein the internal controller (CI) is configured to receive thevibration control data wirelessly via the wireless energy receiver (R).38. The system according to any one of aspects 35 to 37, wherein the internal controller (CI) includes an individual code by which it is individually addressable by an external controller (CE) or remote controller (CR).39. The system according to any one of aspects 35 to 38, comprising an external controller (CE) configured to communicate with the internal controller (CI) wirelessly.40. The system according to aspect 39, wherein the external controller (CE) is an implantable external controller (CE) configured to be implanted within the patient’s body.41. The system according to aspect 39, wherein the external controller (CE) is a remote controller configured to communicate with the internal controller (CI) from outside the patient’s body.42. The system according to aspect 39, comprising a remote controller (CR) configured to communicate with the implantable external controller (CE) from outside the patient’s body.43. The system according to aspect 42, wherein the remote controller is configured to communicate with the implantable external controller (CE) via electric wiring.44. The system according to aspect 42, wherein the remote controller (CR) is configured to communicate with the implantable external controller (CE) wirelessly.45. The system according to any one of aspects 26 to 29, wherein the remote controller is configured to be mounted to the patient’s skin.46. The system of any one of the preceding aspects, wherein the system is configured such that at least one of:- wireless communication from or to, or both from and to, a controller of the system is encrypted,- data transmitted by a controller via wireless communication is signed, and- authentication of a user of the system involves input of authentication data of the patient.47. The system of aspect 46, wherein the encrypted wireless communication includes encryption with a public key and decryption with a private key.48. The system of aspect 47, wherein the private key is a combined key derived by combining at least a first key and a second key.49. The system of any one of aspects 46 to 48, wherein signing of the data transmitted by the controller via wireless communication involves a private key and verification of the signed data involves a public key.50. The system of any one of aspects 46 to 49, comprising a verification unit configured to obtain the authentication data of the patient.51. The system of aspect 35, wherein the verification unit comprises at least one of a fingerprint reader, a retina scanner, a camera, a graphical user interface for inputting a code, and a microphone.52. The system of any one of aspects 46 to 51, comprising a sensation generator for generating a sensation detectable by a sense of the patient, wherein authentication of a communication channel between two controllers of the system involves input of authentication data of the patient relating to the sensation.53. The system of aspect 52, wherein the authentication of the communication channel involves a verification that the authenticationdata match data from the sensation generator relating to the sensation generated by the sensation generator.53. The system of aspect 52 or 53, wherein the sensation generator is configured to generate as the sensation detectable by the sense of the patient at least one of:- a vibration, which includes or does not include a fixed-frequency mechanical vibration,- a sound, which includes or does not include a superposition of fixed-frequency mechanical vibrations,- a photonic signal, which includes or does not include a non-visible light pulse, such as an infrared pulse,- a light signal, which includes or does not include a visual light pulse,- an electrical signal, which includes or does not include an electrical current pulse, and- a heat signal, which includes or does not include a thermal pulse.54. The system of any one of the preceding aspects, wherein the implantable vibration device comprises an outer surface (520) and a coating (530; 530a) arranged on the outer surface.55. The system according to aspect 54, wherein the coating comprises at least one layer of a biomaterial.56. The system according to aspect 55, wherein the biomaterial comprises at least one drug or substance with one or more of the following characteristics: an antithrombotic, an antibacterial and an antiplatelet characteristic.57. The system according to aspect 55 or 56, wherein the biomaterial is fibrin-based.58. The system according to any one of aspects 54 to 47, further comprising a second coating (530b) arranged on the first coating (530a).59. The system according to aspect 54, wherein the second coating is of a different biomaterial than said first coating.60. The system according to aspect 59, wherein the first coating comprises a layer of perfluorocarbon chemically attached to the surface, and wherein the second coating comprises a liquid perfluorocarbon layer.61. The system according to any one of aspects 54 to 60, wherein the coating comprises a drug encapsulated in a porous material.62. The system according to any one of aspects 54 to 61, wherein the surface comprises a metal.63. The system according to aspect 62, wherein the metal comprises at least one of the following, titanium, cobalt, nickel, copper, zinc, zirconium, molybdenum, tin or lead.64. The system according to any one of aspects 40 to 49, wherein the surface comprises a micro pattern.66. The system according to aspect 65, further comprising a layer of a biomaterial coated on the micro pattern.ASPECT 473B– Stimulation_Vibration_Appetite_InvaginatedSENSOR FEEDBACK OBESITY1. A system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.2. The system according to aspect 1, wherein the sensor device comprises a sensor electrode configured to measure an electricactivity in the celiac vagus nerve in response to the vibrations.3. The system according to aspect 1, wherein the sensor device comprises a sensor electrode configured to measure a change in electrical impedance in the celiac vagus nerve in response to the.4. The system according to aspect 2 or 3, wherein: the sensor electrode is configured to be arranged at the the celiac vagus nerve; the sensor device further comprises a reference electrode, and the sensor device is configured to generate the sensor signal based on an electrical interaction between the sensor electrode and the reference electrode.5. The system according to aspect 5, wherein the reference electrode is formed by a casing 120 of the vibration device 110.6. The system according to aspect 1, wherein the sensor device is configured to measure hormone level in the blood of the patient.7. The system according to aspect 6, wherein the hormone is ghrelin.8. The system according to aspect 6, wherein the hormone is insulin.9. The system according to any of the preceding aspects, wherein the control unit is configured to determine a response measurebased on the sensor signal, the response measure being indicative of the celiac nerve response.10. The system according to aspect 9, wherein the control unit is configured to: compare the response measure with a predetermined reference measure; and control the vibration device to: increase an intensity of the vibrations in response to the response measure being below the reference measure, and reduce the intensity of the vibrations in response to the response measure exceeding the reference measure.11. The system according to aspect 10, wherein the control unit is configured to: increase the intensity of the stimulation signal by increasing at least one of a frequency, amplitude, period and duration of the vibrations; and reduce the intensity of the stimulation signal by reducing at least one of the frequency, amplitude, period and duration of vibrations.12. The system according to aspect 10 or 11, wherein the predetermined reference measure is based on a previous measurement ofthe celiac nerve response in the patient.13. The system according to aspect 10 or 11, wherein the predetermined reference measure is based on previous measurements of celiac nerve responses in other patient.14. The system according to aspect 9, wherein the control unit is configured to monitor the level of celiac nerve response over time,and to control the vibration device based on a change rate in the celiac nerve response over time.15. The system according to aspect 9, wherein the control unit is configured to determine a calibration parameter of the vibration device based on the response measure.16. The system according to aspect 1, wherein the vibrations are provided a frequency of 1–150 HzASPECT 473C– Stimulation_Vibration_Appetite_InvaginatedImplantation/treatment method1. A method for implanting a vibration device configured to reduce appetite in a human patient, the method comprises: invaginating, at least partially, a vibration device in the stomach of the patient.2. The method according to aspect 1, further comprising controlling the vibration device to vibrate, to thereby stimulate mechanoreceptors in the tissue of the stomach wall.3. The method according to aspect 2, wherein the controlling controls the vibration device to vibrate at a frequency in the range of1–150 Hz such as in the range of 35–150 Hz.4. The method according to any one of aspects 2–3, wherein the controlling controls the vibration device to vibrate at an amplitude of at least 1 mm, such as in the range of 1–10 mm, preferably in the range of 1–5 mm.5. The method according to any one of aspects 2–4, the implantable vibration device is configured to vibrate with a period of 0.01–1 seconds, such as of 0.05–1 seconds6. The method according to any one of aspects 2–5, wherein the step of controlling the vibration device to vibrate causes thevibration device to vibrate consecutively for a time of at least one minute.7. The method according to any one of the preceding aspects, wherein the vibration device is at least partially invaginated in the outside of the stomach of the patient.8. The method according to any one of aspects 1–6, wherein the vibration device is at least partially invaginated in the inside of the stomach of the patient.9. The method according to any one of aspects 1–8, wherein the vibration device is at least partially invaginated in the antrum of the stomach of the patient.10. The method according to any one of aspects 1–8, wherein the vibration device is at least partially invaginated in the fundus of the stomach of the patient.11. The method according to any one of aspects 1–8, wherein the vibration device is at least partially invaginated in the cardia of the stomach of the patient.12. The method according to any one of the preceding aspects, wherein the vibration device is fully invaginated in the stomach of the patient,13. The method according to any one of the preceding aspects, wherein the method is a laparoscopic surgical method, and themethod further comprises the step of introducing the vibration device into the body of the patient through a laparoscopic trocar.12. The method according to any one of aspects 1–10, wherein the method is a gastroscopic method, and the method further comprises the step of introducing the movement restriction device into the body of the patient through the esophagus of the patient.13. The method according to any one the preceding aspects, wherein the method comprises the step of applying the surface friction reducing coating onto the vibration device prior to implantation in the body of the patient14. The method according to any one of aspects 1–12, wherein the method comprises the step applying the surface friction reducing coating in situ between the implantable vibration device and tissue of the stomach wall of the patient.ASPECT 473D – Stimulation_Vibration_Appetite_Invaginated Method of treatment1. A method of reducing appetite in a human using a medical device system comprising pre-implanted vibration device at least partially invaginated in the wall of the stomach, the method comprising controlling the pre-implanted vibration device to vibrate to thereby activate at least one mechanoreceptor in the tissue of the stomach.2. The method according to aspect 2, wherein the vibration device is controlled to vibrate at a frequency in the range of 1–150 Hz, such as in the range of 35–150 Hz.3. The method according to any one of aspects 1 or 2, wherein the vibration device is controlled to vibrate at a amplitude of at least 1 mm, such as in the range of 1–5 mm, more preferably in the range of 2–4 mm.4. The method according to any one of the preceding aspects, wherein the vibration device is controlled to vibrate consecutively for a period of at least one minute.5. The method according to any one of the preceding aspects, wherein the vibration device further comprises a wireless energy receiver, and wherein the method further comprises the steps of receiving, at the energy receiver, wireless energy for directly or indirectly operating the wireless energy device.6. The method according to aspect 5, wherein the vibration device further comprises an internal controller, wherein the method further comprises wirelessly receiving, at the internal controller, vibration control data for controlling vibration of the vibration device.7. The method according to aspect 6, wherein the vibration control data is wirelessly received via the wireless energy receiver (R).8. The method according to aspect 1, further comprising the step of sending a wireless control signal from a wireless remotecontrol to the pre-implanted medical device system, wherein the vibration device is operated as a result of the receipt of the wirelesscontrol signal at the pre-implanted medical device system.9. The method according to aspect 1, wherein the medical device system further comprises a pre-implanted controller configured to control the operation of the vibration device, and wherein the method comprises operating the vibration device as a result of at least one of: the receipt of a wireless control signal at the controller of the pre-implanted medical device, and the receipt of a sensor signal from a pre-implanted sensor at the controller, and the lapse of a pre-determined time.10. The method according to any one of the preceding aspects, wherein the method is a cosmetic method.11. The method according to any one of the preceding aspects, wherein the method is a non-therapeutic method.ASPECT 474 A- Stimulation_Vibration_Sexual dysfunction_System1. A system for treating sexually dysfunctional female patient, comprising an implantable vibration device (10a) configured tovibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina.2. The system according to claim 1, wherein said implantable vibration device comprises a wireless energy receiver (R) configured to receive wireless energy.3. The apparatus according to aspect 1 or 2, wherein the area of the sexually responsive tissue is the clitoris.4. The apparatus according to aspect 1 or 2 wherein the area of the sexually responsive tissue is the labia major.5. The apparatus according to aspect 1 or 2 wherein the area of the sexually responsive tissue is labia minor.6. The apparatus according to aspect 1 or 2, wherein the area of the sexually responsive tissue is the vestibule.7. The system according to aspect any one of the preceding aspects, wherein the implantable vibration device is configured tovibrate at a frequency in the range of 1–1000 Hz, such as in the range of 1 to 150 Hz.8. The system according to aspect any one of the preceding aspects, wherein the implantable vibration device is configured to vibrate at a the implantable vibration device is configured to vibrate with a period of 0.01–1 seconds, such as of 0.05–1 seconds.9. The system according to aspect any one of the preceding aspects, wherein the implantable vibration device is configured tovibrate at an amplitude such that the tissue in the sexually responsive tissue is displaced at least 0.1 mm.10. The system according to any one of the preceding aspects, wherein the implantable vibration device comprises a vibration generating unit (VGU) capable of causing the implantable vibration device to vibrate.11. The system according to aspect 10, wherein the vibration generating unit (VGU) is comprises a motor having an offset shaft.12. The system according to aspect 10 or 11, wherein the vibration generating unit (VGU) comprises at least one piezoelectric material configured to generate vibrations in the vibration device.13. The implantable vibration device to aspect 12, wherein the piezoelectric material is a ceramic piezoelectric material.14. The implantable vibration device according to aspect 13, wherein the piezoelectric material is lead zirconate titanate, PZT.15. The implantable vibration device according to aspect 13, wherein the piezoelectric material is barium titanate.16. The implantable vibration device according to aspect 13, wherein the piezoelectric material is lead titanate.17. The implantable vibration device according to aspect 12, wherein the piezoelectric material is a polymeric piezoelectric material.18. The implantable vibration device according to aspect 17 wherein the polymeric piezoelectric material is polyvinylidene fluoride, PVDF.19. The implantable vibration device according to any one of aspects 12–18, wherein the piezoelectric material is comprised in a piezoelectric motor.20. The implantable vibration device according to aspect 19, wherein the piezoelectric motor is a piezoelectric inchworm motor.21. The implantable vibration device according to aspect 19, wherein the piezoelectric motor is a piezoelectric inertial motor.22. The medical device according to aspect 21, wherein the piezoelectric motor is a piezoelectric walk-drive motor.23. The medical device according to any one of aspects 20 – 22, wherein the piezoelectric motor is a linear piezoelectric motor.24. The medical device according to aspect 23, wherein the vibration generating unit is attached to the casing, so that vibrations generated by the vibration generating unit can travel to the casing.25. The medical device according to any one of aspects 19 – 22, wherein the piezoelectric motor is a rotational piezoelectric motor.26. The medical device according to aspect 25, wherein the vibration generating unit further comprises an weight configured to be eccentrically rotated by the rotational piezoelectric motor.27. The system according to any one of the preceding aspects, further comprising a further implantable vibration device 110’ configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient.28. The system according to any on the preceding aspects, further comprising a casing adapted to contain the implantable vibration device.29. The system according to aspect 2, or any one of the aspects 3–27, when dependent on claim 2, wherein the system further comprises an implantable wireless energy transmitter (T), wherein wireless energy transmitter is configured to wirelessly transfer energy to the implantable vibration device.30. The system according to aspect 29, wherein the wireless energy transmitter is configured to be implanted in a different, remote position in the body of the patient than the implantable vibration device.31. The system according to any one of aspects 29 or 30, wherein the wireless energy receiver (R) of the implantable vibration device includes a secondary coil, and wherein the wireless energy transmitter (T) comprises a primary coil configured to induce a voltage in the secondary coil of the vibration device (110). 32. The system according to any one aspects 2 or 3–31, when dependent on claim 2, wherein the wireless energy receiver (R) is configured to receive the energy via RFID pulses.33. The system according to aspect 32, comprising a feedback unit configured to provide feedback pertaining to an amount of energy received by the wireless energy receiver (R) via the RFID pulses, the system being configured to adjust an amount of energy based on the feedback.34. The system according to any one of the preceding aspects, wherein the implantable vibration device comprises a rechargeable energy storage unit (E) for temporarily storing at least part of the wirelessly received energy.35. The system according to any one of the preceding aspects, wherein the implantable vibration device (110) comprises an internal controller (CI).36. The system of aspect 35, wherein the internal controller (CI) is configured to wirelessly receive vibration control data for controlling the vibration of the implantable vibration device.37. The system according to aspect 36, when dependent on claim 2, wherein the internal controller (CI) is configured to receive the vibration control data wirelessly via the wireless energy receiver (R).38. The system according to any one of aspects 35 to 37, wherein the internal controller (CI) includes an individual code by which it is individually addressable by an external controller (CE) or remote controller (CR).39. The system according to any one of aspects 35 to 38, comprising an external controller (CE) configured to communicate with the internal controller (CI) wirelessly.40. The system according to aspect 39, wherein the external controller (CE) is an implantable external controller (CE) configured to be implanted within the patient’s body.41. The system according to aspect 39, wherein the external controller (CE) is a remote controller configured to communicate withthe internal controller (CI) from outside the patient’s body.42. The system according to aspect 39, comprising a remote controller (CR) configured to communicate with the implantable external controller (CE) from outside the patient’s body.43. The system according to aspect 42, wherein the remote controller is configured to communicate with the implantable external controller (CE) via electric wiring.44. The system according to aspect 42, wherein the remote controller (CR) is configured to communicate with the implantable external controller (CE) wirelessly.45. The system according to any one of aspects 26 to 29, wherein the remote controller is configured to be mounted to the patient’s skin.46. The system of any one of the preceding aspects, wherein the system is configured such that at least one of:- wireless communication from or to, or both from and to, a controller of the system is encrypted,- data transmitted by a controller via wireless communication is signed, and- authentication of a user of the system involves input of authentication data of the patient.47. The system of aspect 46, wherein the encrypted wireless communication includes encryption with a public key and decryption with a private key.48. The system of aspect 47, wherein the private key is a combined key derived by combining at least a first key and a second key.49. The system of any one of aspects 46 to 48, wherein signing of the data transmitted by the controller via wireless communication involves a private key and verification of the signed data involves a public key.50. The system of any one of aspects 46 to 49, comprising a verification unit configured to obtain the authentication data of the patient.51. The system of aspect 35, wherein the verification unit comprises at least one of a fingerprint reader, a retina scanner, a camera, a graphical user interface for inputting a code, and a microphone.52. The system of any one of aspects 46 to 51, comprising a sensation generator for generating a sensation detectable by a sense ofthe patient, wherein authentication of a communication channel between two controllers of the system involves input of authentication data of the patient relating to the sensation.53. The system of aspect 52, wherein the authentication of the communication channel involves a verification that the authentication data match data from the sensation generator relating to the sensation generated by the sensation generator.53. The system of aspect 52 or 53, wherein the sensation generator is configured to generate as the sensation detectable by the sense of the patient at least one of:- a vibration, which includes or does not include a fixed-frequency mechanical vibration,- a sound, which includes or does not include a superposition of fixed-frequency mechanical vibrations,- a photonic signal, which includes or does not include a non-visible light pulse, such as an infrared pulse,- a light signal, which includes or does not include a visual light pulse,- an electrical signal, which includes or does not include an electrical current pulse, and- a heat signal, which includes or does not include a thermal pulse.54. The system of any one of the preceding aspects, wherein the implantable vibration device comprises an outer surface (520) and a coating (530; 530a) arranged on the outer surface.55. The system according to aspect 54, wherein the coating comprises at least one layer of a biomaterial.56. The system according to aspect 55, wherein the biomaterial comprises at least one drug or substance with one or more of the following characteristics: an antithrombotic, an antibacterial and an antiplatelet characteristic.57. The system according to aspect 55 or 56, wherein the biomaterial is fibrin-based.58. The system according to any one of aspects 54 to 47, further comprising a second coating (530b) arranged on the first coating (530a).59. The system according to aspect 54, wherein the second coating is of a different biomaterial than said first coating.60. The system according to aspect 59, wherein the first coating comprises a layer of perfluorocarbon chemically attached to the surface, and wherein the second coating comprises a liquid perfluorocarbon layer.61. The system according to any one of aspects 54 to 60, wherein the coating comprises a drug encapsulated in a porous material.62. The system according to any one of aspects 54 to 61, wherein the surface comprises a metal.63. The system according to aspect 62, wherein the metal comprises at least one of the following, titanium, cobalt, nickel, copper,zinc, zirconium, molybdenum, tin or lead.64. The system according to any one of aspects 40 to 49, wherein the surface comprises a micro pattern.66. The system according to aspect 65, further comprising a layer of a biomaterial coated on the micro pattern.ASPECT 474 B- Stimulation_Vibration_Sexual dysfunction_System Method of implantation1. A method for implanting a vibration device for delivering vibrations to the sexually responsive tissue in a female, wherein the vibration device (110.110’) is configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall orthe vagina, wherein said implantable vibration device comprises a wireless energy receiver (R) configured to receive wireless energy, the method comprising the steps of creating an opening in the skin or vaginal wall of the female patient; dissecting an area of the sexually responsive tissue, and placing the vibration device within said area. 2. The operation method according to aspect 1, wherein the step of creating an opening in the skin or vaginal wall of the female patient comprises inserting a tube or needle into the patients body, filling the tube or needle with a gas and thereby expanding a cavity within the female patients body, inserting at least two laparoscopic trocars into said cavity, inserting at least one camera trough at least one laparoscopic trocar, inserting at least one dissecting tool through at least one laparoscopic trocar.3. The method according to aspect 1 or 2, wherein the area of the sexually responsive tissue is the vulva.4. The method according to aspect 1 or 2 wherein the area of the sexually responsive tissue is the vagina.5. The method according to aspect 1 or 2, wherein the area of the sexually responsive tissue is the clitoris.6. The method according to aspect 1 or 2 wherein the area of the sexually responsive tissue is the labia major.7. The method according to aspect 1 or 2 wherein the area of the sexually responsive tissue is labia minor.8. The method according to aspect 1 or 2, wherein the area of the sexually responsive tissue the vestibule.ASPECT 474 C- Stimulation_Vibration_Sexual dysfunction_System Sexual stimulation method1. A method for delivering vibrations to the sexually responsive tissue of a female using a pre-implanted medical device systemcomprising a vibration device pre-implanted in the sexually responsive tissue of the vulva or the wall of the vagina, wherein the vibrationdevice comprises a wireless energy receiver, wherein the method comprises the steps of controlling the vibration device to vibrate to thereby stimulate the sexually responsive tissue of the vulva or wall of the vagina; and receiving, at the energy receiver, wireless energy for directly or indirectly operating the vibration device.2. The method according to aspect 1, wherein the vibration device and the wireless energy receiver R are provided in a common, pre-implanted, casing.3. The method according to any one of aspect 1 or 2, wherein the vibration device is controlled to vibrate at an frequency in the range of 0.1 to 1 kHz.4. The method according to aspect 3, wherein the vibration device is controlled to vibrate at an frequency in the range of 0.1 to 100 Hz.5. The method according to any one of the preceding aspects, wherein the vibration device is controlled to vibrate at an amplitude of at least 0.1 mm, or of at least 1 mm, or in the range of 0.1 to 10 mm, or in the range of 1 to 5 mm.6. The method according to any one of the preceding aspects, further comprising a step of step of sending a wireless control signal the pre-implanted vibration device, wherein the vibration device is configured to vibrate as a result of the wireless control signal.7. The method according to aspect any one of aspects 1–5, wherein the pre-implanted medical device system further comprises a controller configured to control the operation of the vibration device, and wherein the method comprises operating the first member as a result of at least one of: the receipt of a wireless control signal at the controller of the pre-implanted medical device, and the receipt of a sensor signal from a pre-implanted sensor at the controller, and the lapse of a pre-determined time.8. The method according to any one of the preceding aspects, wherein the pre-implanted medical device is pre-implanted in an area of the sexually responsive tissue in the vulva.9. The method according to any one of aspects 1–7, wherein the pre-implanted medical device is pre-implanted in an area of the sexually responsive tissue in the vagina.10. The method according to any one of aspects 1–7, wherein the pre-implanted medical device is pre-implanted in an area of the sexually responsive tissue in the clitoris.11. The method according to any one of aspects 1–7, wherein the pre-implanted medical device is pre-implanted in an area of the sexually responsive tissue in the labia major.12. The method according to any one of aspects 1–7, wherein the pre-implanted medical device is pre-implanted in an area of the sexually responsive tissue in the labia minor.13. The method according to any one of aspects 1–7, wherein the pre-implanted medical device is pre-implanted in an area of the sexually responsive tissue in the vestibule.ASPECT 475A Stimulation_Vibration_General_Piezo Piezoelectric vibrator1. An implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.2. The implantable vibration device according to aspect 1, further comprising a wireless energy receiver (R) configured to receive wireless energy to be used, directly or indirectly, by the vibration generating unit, wherein the casing further encloses the wireless energy receiver (R).3. The implantable vibration device according to aspect 1, further comprising a wireless energy receiver (R) configured to receive wireless energy to be used, directly or indirectly, by the vibration generating unit, wherein the wireless energy receiver is provided outside the casing and coupled to the vibration generating unit through a lead.4. The implantable vibration device according to any one of the preceding aspects, further comprising a rechargeable energy storage unit provided within the casing.5. The implantable vibration device according to any one of the preceding aspects, wherein the implantable vibration device (110) comprises an internal controller (CI).6. The implantable vibration device of aspect 5, wherein the internal controller (CI) is configured to wirelessly receive vibration control data for controlling the vibration of the implantable vibration device.7. The implantable vibration device according to aspect 6, wherein the internal controller (CI) is configured to receive the vibration control data wirelessly via the wireless energy receiver (R).8. The implantable vibration device according to any one of aspects 5–7, wherein the casing further encloses the internal controller (CI).9. The implantable vibration device according to any one the preceding aspects, wherein the piezoelectric material is a ceramic piezoelectric material.10. The implantable vibration device according to aspect 9, wherein the piezoelectric material is lead zirconate titanate, PZT.11. The implantable vibration device according to aspect 9, wherein the piezoelectric material is barium titanate.12. The implantable vibration device according to aspect 9, wherein the piezoelectric material is lead titanate.13. The implantable vibration device according to any one aspect 1–8, wherein the piezoelectric material is a polymeric piezoelectric material.14. The implantable vibration device according to aspect 13 wherein the polymeric piezoelectric material is polyvinylidene fluoride, PVDF.15. The implantable vibration device according to any one of aspects 1–14, wherein the piezoelectric material is comprised in a piezoelectric motor.16. The implantable vibration device according to aspect 14, wherein the piezoelectric motor is a piezoelectric inchworm motor.17. The implantable vibration device according to aspect 14, wherein the piezoelectric motor is a piezoelectric inertial motor.18. The medical device according to aspect 14, wherein the piezoelectric motor is a piezoelectric walk-drive motor.19. The medical device according to any one of aspects 16 – 18, wherein the piezoelectric motor is a linear piezoelectric motor.19. The medical device according to aspect 18, wherein the vibration generating unit is attached to the casing, so that vibrations generated by the vibration generating unit can travel to the casing.20. The medical device according to any one of aspects 16 – 18, wherein the piezoelectric motor is a rotational piezoelectric motor.21. The medical device according to aspect 20, wherein the vibration generating unit further comprises an weight configured to be eccentrically rotated by the rotational piezoelectric motor.22. The implantable vibration device according to any one of the preceding aspects, wherein vibration generating unit is configured to cause the implantable vibration device to vibrate at a frequency in the range of 1–150 Hz, such as in the range of 35–150 Hz.23. The implantable vibration device according to aspect any one of the preceding aspects, wherein vibration generating unit is configured to cause the implantable vibration device to vibrate at an amplitude of at least 1 mm.24. The implantable vibration device of any one of the preceding aspects, wherein the implantable vibration device comprises an outer surface and a coating arranged on the outer surface.25. The implantable vibration device according to aspect 24, wherein the coating comprises at least one layer of a biomaterial.26. The implantable vibration device according to aspect 25, wherein the biomaterial comprises at least one drug or substance with one or more of the following characteristics: an antithrombotic, an antibacterial and an antiplatelet characteristic.27. The implantable vibration device according to aspect 25 or 26, wherein the biomaterial is fibrin-based.28. The implantable vibration device according to any one of aspects 25–27, further comprising a second coating arranged on the first coating.29. The implantable vibration device according to aspect 28, wherein the second coating is of a different biomaterial than said first coating.30. The implantable vibration device according to aspect 29, wherein the first coating comprises a layer of perfluorocarbon chemically attached to the surface, and wherein the second coating comprises a liquid perfluorocarbon layer.31. The implantable vibration device according to any one of aspects 24 to 30, wherein the coating comprises a drug encapsulated in a porous material.32. The implantable vibration device according to any one of aspects 24 to 31, wherein the surface comprises a metal.33. The implantable vibration device according to aspect 32, wherein the metal comprises at least one of the following, titanium, cobalt, nickel, copper, zinc, zirconium, molybdenum, tin or lead.34. The implantable vibration device according to any one of aspects 24 to 33, wherein the surface comprises a micro pattern.35. The implantable vibration device according to aspect 34, further comprising a layer of a biomaterial coated on the micro pattern.36. The medical device according to any one of aspects 1–35, wherein the vibration generating unit is substantially non-magnetic.37. The medical device according to any one of aspects 1 – 36, wherein the vibration generating unit is substantially non-metallic.38. The medical device according to any one of aspects 1 – 37, wherein the piezoelectric motor is a reversable piezoelectric motor. ASPECT_371-Electro_Subcutaneous_Control_Pop-Rivet2_Flange 1. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a fourth cross-sectional area in a fourth plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, third and fourth planes are parallel to each other, the third cross-sectional area is smaller than the second and fourth cross-sectional areas, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, and the first portion is detachably connected to at least one of the connecting portion and the second portion. 2. The implantable energized medical device according to aspect 1, wherein the connecting portion comprises a flange comprising the fourth cross-sectional area, such that the flange is prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes. 3. The implantable energized medical device according to aspect 2, wherein the flange protrudes in a direction parallel to the first, second, third and fourth planes, and perpendicular to a central extension of the connecting portion. 4. The implantable energized medical device according to aspect 2 or 3, wherein the flange comprises the third surface configured to engage the first tissue surface of the first side of the tissue portion. 5. The implantable energized medical device according to aspect 1, wherein the connecting portion comprises at least one protruding element comprising the fourth cross-sectional area, such that the at least one protruding element is prevented from travelling through the hole in the tissue portion, such that the second portion and the connecting portion can be held in position by the tissue portion of the patient also when the first portion is disconnected from the connecting portion. 6. The implantable energized medical device according to aspect 5, wherein the at least one protruding element protrudes in a direction parallel to the first, second, third and fourth planes, and perpendicular to a central extension of the connecting portion.7. The implantable energized medical device according to aspect 2 or 3, wherein the at least one protruding element comprises the third surface configured to engage the first tissue surface of the first side of the tissue portion.8. The implantable energized medical device according to any one of aspects 5 – 7, wherein the connecting portion comprises at least two protruding elements comprising the fourth cross-sectional area.9. The implantable energized medical device according to any one of aspects 5 – 8, wherein the at least two protruding elements are symmetrically arranged about a central axis of the connecting portion.10. The implantable energized medical device according to any one of aspects 5 – 8, wherein the at least two protruding elements are asymmetrically arranged about a central axis of the connecting portion. 11. The implantable energized medical device according to any one of the preceding aspects, wherein at least one of the first, second and third surfaces comprises at least one of ribs, barbs, hooks, a friction enhancing surface treatment, and a friction enhancing material, to facilitate the implantable energized medical device being held in position by the tissue portion. 12. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion comprises a hollow portion.13. The implantable energized medical device according to aspect 8, wherein the hollow portion provides a passage between the first and second portions. 14. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion is detachably connected to the connecting portion by at least one of a mechanical connection and a magnetic connection. 15. The implantable energized medical device according to aspect 14, wherein the first portion is detachably connected to the connecting portion by at least one of threads and corresponding grooves, a screw, a self-locking element, a twist and lock fitting, and a spring-loaded locking mechanism. 16. The implantable energized medical device according to aspect 5, wherein the at least one protruding element has a height in a direction perpendicular to the fourth plane being less than a height of the first portion in said direction. 17. The implantable energized medical device according to aspect 16, wherein the at least one protruding element has a height in said direction perpendicular to the fourth plane being less than half of said height of the first portion in said direction. 18. The implantable energized medical device according to aspect 17, wherein the at least one protruding element has a height in said direction perpendicular to the fourth plane being less than a quarter of said height of the first portion in said direction. 19. The implantable energized medical device according to aspect 18, wherein the at least one protruding element has a height in said direction perpendicular to the fourth plane being less than a tenth of said height of the first portion in said direction. 20. The implantable energized medical device according to aspect 5, wherein the at least one protruding element has a diameter in the fourth plane being one of: less than a diameter of the first portion in the first plane, equal to a diameter of the first portion in the first plane, and larger than a diameter of the first portion in the first plane. 21. The implantable energized medical device according to aspect 5, wherein the at least one protruding element has a cross-sectional area in the fourth plane being one of: less than a cross-sectional area of the first portion in the first plane, equal to a cross-sectional area of the first portion in the first plane, and larger than a cross-sectional area of the first portion in the first plane. 22. The implantable energized medical device according to aspect 5, wherein the at least one protruding element has a height in said direction perpendicular to the fourth plane being less than half of a height of the connecting portion in said direction. 23. The implantable energized medical device according to aspect 22, wherein the at least one protruding element has a height in said direction perpendicular to the fourth plane being less than a quarter of said height of the connecting portion in said direction. 24. The implantable energized medical device according to aspect 23, wherein the at least one protruding element has a height in said direction perpendicular to the fourth plane being less than a tenth of said height of the connecting portion in said direction. 25. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first wireless energy receiver configured to receive energy transmitted wirelessly from an external wireless energy transmitter. 26. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises an internal wireless energy transmitter. 27. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second wireless energy receiver. 28. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first energy storage unit.29. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second energy storage unit. 30. The implantable energized medical device according to aspect 28 or 29, wherein at least one of the first and second energy storage unit is a solid-state battery. 31. The implantable energized medical device according to aspect 30, wherein the solid-state battery is a thionyl-chloride battery.32. The implantable energized medical device according to any one of aspects 24 – 31, wherein: the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter, and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. 33. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first controller comprising at least one processing unit. 34. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second controller comprising at least one processing unit. 35. The implantable energized medical device according to any one of aspects 33 and 34, wherein at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device.36. The implantable energized medical device according to any one of aspects 33 – 35, wherein: the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion.37. The implantable energized medical device according to aspect 36, wherein the second controller is connected to the second wirelesscommunication receiver for receiving wireless communication from the first portion.38. The implantable energized medical device according to any one of aspects 25 – 37, wherein the first wireless energy receiver comprises a first coil and the internal wireless energy transmitter comprises a second coil.39. The implantable energized medical device according to any one of aspects 25 – 38, wherein the first portion comprises a combined coil,wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion. 40. The implantable energized medical device according to aspect 38 or 39, wherein at least one of the coils are embedded in a ceramic material. 41. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. 42. The implantable energized medical device according to aspect 41, wherein the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. 43. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured toenclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. 44. The implantable energized medical device according to aspect 43, wherein the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. 45. The implantable energized medical device according to any one of the preceding aspects further comprising at least one sensor for providing input to at least one of the first and second controller. 46. The implantable energized medical device according to aspect 45, wherein the sensor is a sensor configured to sense a physical parameter of the implantable energized medical device. 47. The implantable energized medical device according to aspect 46, wherein the sensor is a sensor configured to sense at least one of: a temperature of the implantable energized medical device or of a body engaging portion, a parameter related to the power consumption of the implantable energized medical device or of a body engaging portion, a parameter related to a status of at least one of the first and second energy storage unit, a parameter related to the wireless transfer of energy from a source external to the body of the patient, and a hydraulic pressure.48. The implantable energized medical device according to 45 – 47, wherein the sensor is a sensor configured to sense a physiological parameter of the patient. 49. The implantable energized medical device according to aspect 48, wherein the sensor is a sensor configured to sense at least one of: a parameter related to the patient swallowing, a local temperature, a systemic temperature, blood saturation, blood oxygenation, blood pressure, a parameter related to an ischemia marker, and pH.50. The implantable energized medical device according to aspect 49, wherein the sensor configured to sense a parameter related to the patient swallowing comprises at least one of: a motility sensor, a sonic sensor, an optical sensor, and a strain sensor. 51. The implantable energized medical device according to aspect 49, wherein the sensor configured to sense pH is configured to sense the acidity in the stomach.52. The implantable energized medical device according to any one of aspects 45 – 51, wherein the controller is configured to transmit information based on sensor input to a device external to the body of the patient. 53. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least a portion of an operation device for operating an implantable body engaging portion. 54. The implantable energized medical device according to aspect 53, wherein the second portion comprises at least one electrical motor.55. The implantable energized medical device according to clam 54, wherein the second portion comprises a transmission configured to reduce the velocity and increase the force of the movement generated by the electrical motor. 56. The implantable energized medical device according to clam 55, wherein the transmission is configured to transfer a week force with ahigh velocity into a stronger force with lower velocity. 57. The implantable energized medical device according to 55 or 56, wherein the transmission is configured to transfer a rotating force into a linear force.58. The implantable energized medical device according to any one of aspects 55 – 57, wherein the transmission comprises a gear system.59. The implantable energized medical device according to any one of aspects 54 – 58, wherein the second portion comprises a magnetic coupling for transferring mechanical work from the electrical motor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housing enclosing at least the second portion. 60. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least one hydraulic pump. 61. The implantable energized medical device according to aspect 60, wherein the hydraulic pump comprises a pump comprising at least one compressible hydraulic reservoir.62. The implantable energized medical device according to any one of aspects 54 – 61, further comprising a capacitor connected to at least one of the first and second energy storage unit and connected to the electrical motor, wherein the capacitor is configured to: be charged by at least one of the first and second energy storage units, and provide the electrical motor with electrical power. 63. The implantable energized medical device according to any one of the preceding aspects, wherein at least one of the first and second portion comprises a sensation generator adapted to generate a sensation detectable by a sense of the patient. 64. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a force transferring element configured to mechanically transfer force from the second portion to an implanted body engaging portion. 65. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a force transferring element configured to hydraulically transfer force from the second portion to an implanted body engaging portion. 66. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least one lead for transferring electrical energy and/or information from the second portion to an implanted body engaging portion. 67. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises an injection port for injecting fluid into the first portion. 68. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion comprises a conduit for transferring a fluid from the first portion to the second portion. 69. The implantable energized medical device according to aspect 68, wherein the conduit is arranged to extend through the hollow portion of the connecting portion.70. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a first and a second chamber separated from each other, wherein the first chamber comprises a first liquid and the second chamber comprises a second liquid, and wherein the second liquid is a hydraulic liquid configured to transfer force to an implantable element configured to exert force on the body portion of the patient. 71. The implantable operation device according to aspect 70, wherein a wall portion of the first chamber is resilient to allow an expansion of the first chamber. 72. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a first hydraulic system in fluid connection with a first hydraulically operable implantable element configured to exert force on the body portion of the patient, anda second hydraulic system in fluid connection with a second hydraulically operable implantable element configured to exert force on the body portion of the patient, wherein the first and second hydraulically operable implantable elements are adjustable independently from each other. 73. The implantable energized medical device according to aspect 72, wherein the first hydraulic system comprises a first hydraulic pump and the second hydraulic systems comprises a second hydraulic pump. 74. The implantable energized medical device according to aspect 72 or 73, wherein each of the first and second hydraulic systemscomprises a reservoir for holding hydraulic fluid.75. The implantable energized medical device according to any one of aspects 72 – 74, further comprising a first pressure sensor configured to sense a pressure in the first hydraulic system, and a second pressure sensor configured to sense a pressure in the second hydraulic system. 76. The implantable energized medical device according to any one of the preceding aspects, wherein the first surface is configured toengage the first tissue surface of the first side of the tissue portion. 77. The implantable energized medical device according to any one of the preceding aspects, wherein the first, second and third planes are parallel to a major extension plane of the tissue. 78. The implantable energized medical device according to any one of the preceding aspects, wherein the fourth plane is parallel to a major extension plane of the tissue. 79. The implantable energized medical device according to any one of the preceding aspects, wherein the third cross-sectional area issmaller than the first cross-sectional area. 80. The implantable energized medical device according to any one of the preceding aspects, wherein the third cross-sectional area is equal to or larger than the first cross-sectional area. 81. An implantable device for exerting a force on a body portion of a patient comprising: the implantable energized medical device according to any one of aspects1 – 80, an implantable element. 82. The implantable device according to aspect 81, wherein the implantable element comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall.83. The implantable device according to aspect 81, wherein the implantable a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.84. The implantable device according to aspect 81, wherein the implantable element comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unitcomprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.85. The implantable device according to aspect 81, wherein the implantable element an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. ASPECT_373-Electro_Subcutaneous_Control_Pop-Rivet2_Internal-Wireless 1. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a secondtissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion comprises a first wireless energy receiver for receiving energy transmitted wirelessly by an external wireless energy transmitter, and an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion, and the second portion comprises a second wireless energy receiver configured to receive energy transmitted wirelessly by the internal wireless energy transmitter.2. The implantable energized medical device according to aspect 1, wherein the first portion comprises a first energy storage unit connected to the first wireless energy receiver.3. The implantable energized medical device according to any one of aspects 1 and 2, wherein the second portion comprises a second energy storage unit connected to the second wireless energy receiver. 4. The implantable energized medical device according to aspect 3, wherein at least one of the first and second energy storage unit is a solid-state battery. 5. The implantable energized medical device according to aspect 4, wherein the solid-state battery is a thionyl-chloride battery.6. The implantable energized medical device according to any one of aspects 3 – 5, wherein: the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. 7. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first controller comprising at least one processing unit. 8. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second controller comprising at least one processing unit. 9. The implantable energized medical device according to any one of aspects 7 and 8, wherein at least one of the first and second controlleris connected to a wireless transceiver for communicating wirelessly with an external device. 10. The implantable energized medical device according to any one of aspects 7 and 8, wherein:the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion. 11. The implantable energized medical device according to aspect 10, wherein the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion.12. The implantable energized medical device according to any one of the preceding aspects, wherein the first wireless energy receiver comprises a first coil and the wireless energy transmitter comprises a second coil. 13. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion.14. The implantable energized medical device according to any one of aspects 12 and 13, wherein at least one of the coils are embedded in a ceramic material. 15. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. 16. The implantable energized medical device according to aspect 15, wherein the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. 17. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured toenclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. 18. The implantable energized medical device according to aspect 17, wherein the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. 19. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion is detachably connected to at least one of the second portion and the connecting portion. 20. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion comprising a flange having a flange area being larger than a cross-section area of the hole in the tissue portion, such that the flange is hindered from travelling through the hole in the tissue portion, such that the second portion and the connecting portion can be held in position by thetissue portion of the patient also when the first portion is disconnected from the connecting portion. 21. The implantable energized medical device according to any one of the preceding aspects further comprising at least one sensor for providing input to at least one of the first and second controller. 22. The implantable energized medical device according to aspect 21, wherein the sensor is a sensor configured to sense a physical parameter of the implantable energized medical device. 23. The implantable energized medical device according to aspect 22, wherein the sensor is a sensor configured to sense at least one of: a temperature of the implantable energized medical device or of a body engaging portion, a parameter related to the power consumption of the implantable energized medical device or of a body engaging portion, a parameter related to a status of at least one of the first and second energy storage unit, a parameter related to the wireless transfer of energy from a source external to the body of the patient, and a hydraulic pressure.24. The implantable energized medical device according to any one of aspects 21 – 23, wherein the sensor is a sensor configured to sense a physiological parameter of the patient. 25. The implantable energized medical device according to aspect 24, wherein the sensor is a sensor configured to sense at least one of: a parameter related to the patient swallowing, a local temperature, a systemic temperature, blood saturation, blood oxygenation, blood pressure, a parameter related to an ischemia marker, and pH. 26. The implantable energized medical device according to aspect 25, wherein the sensor configured to sense a parameter related to the patient swallowing comprises at least one of: a motility sensor, a sonic sensor, an optical sensor, and a strain sensor. 27. The implantable energized medical device according to aspect 25, wherein the sensor configured to sense pH is configured to sense the acidity in the stomach.28. The implantable energized medical device according to any one of aspects 21 – 27, wherein the controller is configured to transmit information based on sensor input to a device external to the body of the patient. 29. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least a portion of an operation device for operating an implantable body engaging portion. 30. The implantable energized medical device according to aspect 29, wherein the second portion comprises at least one electrical motor. 31. The implantable energized medical device according to clam 30, wherein the second portion comprises a transmission configured to reduce the velocity and increase the force of the movement generated by the electrical motor. 32. The implantable energized medical device according to aspects 31, wherein the transmission is configured to transfer a rotating force into a linear force. 33. The implantable energized medical device according to aspect 31 or 32, wherein the transmission comprises a gear system.34. The implantable energized medical device according to any one of clams 30 – 33, wherein the second portion comprises a magnetic coupling for transferring mechanical work from the electrical motor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housing enclosing at least the second portion.35. The implantable energized medical device according to any one of aspects 29 – 34, wherein the second portion comprises at least one hydraulic pump. 36. The implantable energized medical device according to aspect 35, wherein the hydraulic pump comprises a pump comprising at least one compressible hydraulic reservoir.37. The implantable energized medical device according to any one of aspects 30 – 36, further comprising a capacitor connected to at least one of the first and second implantable energy storage unit and connected to the electrical motor, wherein the capacitor is configured to: be charged by at least one of the first and second implantable energy storage units, and provide the electrical motor with electrical power.38. The implantable energized medical device according to any one of the preceding aspects, wherein at least one of the first and second portion comprises a sensation generator adapted to generate a sensation detectable by a sense of the patient. 39. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a force transferring element configured to mechanically transfer force from the second portion to an implanted body engaging portion. 40. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a force transferring element configured to hydraulically transfer force from the second portion to an implanted body engaging portion. 41. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least one lead for transferring electrical energy and/or information from the second portion to an implanted body engaging portion. 42. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises an injection port for injecting fluid into the first portion. 43. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion comprises a conduit for transferring a fluid from the first portion to the second portion. 44. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a first and a second chamber separated from each other, wherein the first chamber comprises a first liquid and the second chamber comprises a second liquid, and wherein the second liquid is a hydraulic liquid configured to transfer force to an implantable element configured to exert force on the body portion of the patient. 45. The implantable operation device according to aspect 44, wherein a wall portion of the first chamber is resilient to allow an expansion of the first chamber. 46. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a first hydraulic system in fluid connection with a first hydraulically operable implantable element configured to exert force on the body portion of the patient, and a second hydraulic system in fluid connection with a second hydraulically operable implantable element configured to exert force on the body portion of the patient, wherein the first and second hydraulically operable implantable elements are adjustable independently from each other. 47. The implantable energized medical device according to aspect 46, wherein the first hydraulic system comprises a first hydraulic pump and the second hydraulic systems comprises a second hydraulic pump. 48. The implantable energized medical device according to any one of aspects 46 and 47, wherein each of the first and second hydraulic systems comprises a reservoir for holding hydraulic fluid.49. The implantable energized medical device according to any one of aspects 46 – 48, further comprising a first pressure sensor configured to sense a pressure in the first hydraulic system, and a second pressure sensor configured to sense a pressure in the second hydraulic system. 50. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion further comprises a fourt cross-sectional area in a fourth plane, wherein the fourt plane is parallel to the first, second and third planes, and wherein the third cross-sectional area is smaller than the fourth cross-sectional area. 51. The implantable energized medical device according to aspect 50, wherein the connecting portion comprises a protruding element comprising the fourth cross-sectional area.52. The implantable energized medical device according to any one of the preceding aspects, wherein the first surface is configured to engage the first tissue surface of the first side of the tissue portion. 53. The implantable energized medical device according to any one of the preceding aspects, wherein a connecting interface between theconnecting portion and the second portion is excentric with respect to the second portion. 54. An implantable device for exerting a force on a body portion of a patient comprising: the implantable energized medical device according to any one of aspects1 – 53, an implantable element configured to exert a force on a body portion of the patient. 55. The implantable device according to aspect 54, wherein the implantable element comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by thetissue of the stomach wall or the intestine wall. 56. The implantable device according to aspect 54, wherein the implantable a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.57. The implantable device according to aspect 54, , wherein the implantable element comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.58. The implantable device according to aspect 54, wherein the implantable element an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device isconfigured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. ASPECT_374-Electro_Subcutaneous_Control_Pop-Rivet2_Shoe 1. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, and a connecting interface between the connecting portion and the second portion is excentric with respect to the second portion. 2. The implantable energized medical device according to aspect 1, wherein the connecting interface between the connecting portion and the second portion is excentric, with respect to the second portion, in a first direction, but not in a second direction being perpendicular to the first direction. 3. The implantable energized medical device according to aspect 1, wherein the connecting interface between the connecting portion and the second portion is excentric, with respect to the second portion, in a first direction and in a second direction being perpendicular to the first direction. 4. The implantable energized medical device according to aspect 2 or 3, wherein the first direction and second direction are parallel to the second plane. 5. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion has a first end and asecond end opposing the first end, wherein the second portion has a length between the first and second end. 6. The implantable energized medical device according to aspect 5, wherein the first end and second end are separated in a direction parallel to the second plane. 7. The implantable energized medical device according to any one of aspects 5 to 6, wherein the second portion is curved along the length. 8. The implantable energized medical device according to aspect 7, wherein the second portion is curved in said first direction and said second direction being perpendicular to the first direction.9. The implantable energized medical device according to any one of aspects 5 – 8, wherein the first and second ends comprise an elliptical point respectively.10. The implantable energized medical device according to any one of aspects 5 – 9, wherein the first and second ends comprise a hemispherical end cap respectively.11. The implantable energized medical device according to any one of aspects 5 – 10, wherein the second portion has at least one circular cross-section along the length between the first and second end.12. The implantable energized medical device according to any one of aspects 5 – 11, wherein the second portion has at least one oval cross- section along the length between the first and second end.13. The implantable energized medical device according to any one of aspects 5 – 12, wherein the second portion has at least one elliptical cross-section along the length between the first and second end.14. The implantable energized medical device according to any one of aspects 5 – 13, wherein the second portion has said length in a direction being different to a central extension of the connecting portion. 15. The implantable energized medical device according to anyone of the preceding aspects, wherein the second portion has a proximal region, an intermediate region, and a distal region. 16. The implantable energized medical device according to aspect 15, wherein the proximal region extends from the first end to an interface between the connecting portion and the second portion, the intermediate region is defined by the connecting interface between the connecting portion and the second portion, and the distal region extends from the interface between the connecting portion and the second portion to the second end. 17. The implantable energized medical device according to aspect 16, wherein the proximal region is shorter than the distal region with respect to the length of the second portion. 18. The implantable energized medical device according to any one of aspects 15 to 17, wherein the proximal region and the intermediate region together are shorter than the distal region with respect to the length of the second portion.19. The implantable energized medical device according to any one of aspects 15 to 18, wherein the proximal region and the distal region comprises the second surface configured to engage the second surface of the second side of the tissue portion. 20. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion has a length x and a width y along respective length and width directions being perpendicular to each other and substantially parallel to the second plane,wherein the connecting interface between the connecting portion and the second portion is contained within a region extending from x>0 tox<x/2 and/or y>0 to y<y/2, x and y and 0 being respective end points of the second portion along said length and width directions. 21. The implantable energized medical device according to aspect 5, wherein the second portion is tapered from the first end to the second end. 22. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion is tapered from each of the first end and second end towards the intermediate region of the second portion. 23. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion has a maximum dimension being in the range of 10 to 40 mm, such as in the range of 10 to 30 mm, such as in the range of 15 to 25 mm. 24. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion has a diameter being in the range of 10 to 40 mm, such as in the range of 10 to 30 mm, such as in the range of 15 to 25 mm. 25. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion has a maximumdimension in the third plane in the range of 2 to 20 mm, such as in the range of 2 to 15 mm, such as in the range of 5 to 10 mm. 26. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion has a maximumdimension being in the range of 30 to 90 mm, such as in the range of 30 to 70 mm, such as in the range of 35 to 60 mm.27. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion has one or more of a spherical shape, an ellipsoidal shape, a polyhedral shape, an elongated shape, and a flat disk shape. 28. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion has one of an oval cross-section, an elongated cross-section, and a circular cross-section, in a plane parallel to the third plane. 29. The implantable energized medical device according to aspect 15, wherein the distal region is configured to be directed downwards in a standing patient. 30. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a proximal region extending from an first end to an interface between the connecting portion and the first portion, an intermediate region defined by an connecting interface between the connecting portion and the first portion, and a distal region extending from the interface between the connecting portion and the first portion to a second end of the first portion. 31. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion has a first height, and the second portion has a second height, both heights being in a direction perpendicular to the first and second planes, wherein the first height is smaller than the second height. 32. The implantable energized medical device according to aspect 31, wherein the first height is less than 2/3 of the second height, such as less than 1/2 of the second height, such as less than 1/3 of the second height. 33. The implantable energized medical device according to aspect 5, wherein the second end of the second portion comprises connections for connecting to an implant being located in a caudal direction from a location of the implantable energized medical device in the patient. 34. The implantable energized medical device according to aspect 5, wherein the first end of the second portion comprises connections for connecting to an implant being located in a cranial direction from a location of the implantable energized medical device in the patient. 35. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion furthercomprises a fourt cross-sectional area in a fourth plane, wherein the fourt plane is parallel to the first, second and third planes, and wherein the third cross-sectional area is smaller than the fourth cross-sectional area. 36. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion comprises a protruding element comprising the fourth cross-sectional area. 37. The implantable energized medical device according to any one of the preceding aspects, wherein the first surface is configured to engage the first tissue surface of the first side of the tissue portion. 38. The implantable energized medical device according to any one of the preceding aspects, wherein a connecting interface between the connecting portion and the second portion is excentric with respect to the second portion. 39. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first wireless energy receiver configured to receive energy transmitted wirelessly from an external wireless energy transmitter. 40. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises an internal wireless energy transmitter. 41. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second wireless energy receiver. 42. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first energy storage unit. 43. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second energy storage unit. 44. The implantable energized medical device according to aspect 42 or 43, wherein at least one of the first and second energy storage unit is a solid-state battery. 45. The implantable energized medical device according to aspect 44, wherein the solid-state battery is a thionyl-chloride battery.46. The implantable energized medical device according to any one of aspects 39 – 45, wherein: the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter, and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. 47. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first controller comprising at least one processing unit. 48. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second controller comprising at least one processing unit. 49. The implantable energized medical device according to aspect 47 or 48, wherein at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device.50. The implantable energized medical device according to any one of aspects 47 – 49, wherein: the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion. 51. The implantable energized medical device according to aspect 50, wherein the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion.52. The implantable energized medical device according to any one of aspects 39 – 51, wherein the first wireless energy receiver comprises a first coil and the internal wireless energy transmitter comprises a second coil.53. The implantable energized medical device according to any one of aspects 39 – 52, wherein the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion.54. The implantable energized medical device according to aspect 52 or 53, wherein at least one of the coils are embedded in a ceramic material. 55. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. 56. The implantable energized medical device according to aspect 55, wherein the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. 57. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured to enclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. 58. The implantable energized medical device according to aspect 57, wherein the portion of the housing made from a ceramic materialcomprises at least one coil embedded in the ceramic material. 59. The implantable energized medical device according to any one of the preceding aspects further comprising at least one sensor for providing input to at least one of the first and second controller. 60. The implantable energized medical device according to aspect 59, wherein the sensor is a sensor configured to sense a physical parameter of the implantable energized medical device. 61. The implantable energized medical device according to aspect 60, wherein the sensor is a sensor configured to sense at least one of: a temperature of the implantable energized medical device or of a body engaging portion, a parameter related to the power consumption of the implantable energized medical device or of a body engaging portion, a parameter related to a status of at least one of the first and second energy storage unit, a parameter related to the wireless transfer of energy from a source external to the body of the patient, and a hydraulic pressure.62. The implantable energized medical device according to 59 – 61, wherein the sensor is a sensor configured to sense a physiological parameter of the patient.63. The implantable energized medical device according to aspect 62, wherein the sensor is a sensor configured to sense at least one of: a parameter related to the patient swallowing, a local temperature, a systemic temperature, blood saturation, blood oxygenation, blood pressure, a parameter related to an ischemia marker, and pH. 64. The implantable energized medical device according to aspect 63, wherein the sensor configured to sense a parameter related to the patient swallowing comprises at least one of: a motility sensor, a sonic sensor, an optical sensor, and a strain sensor. 65. The implantable energized medical device according to aspect 63, wherein the sensor configured to sense pH is configured to sense the acidity in the stomach.66. The implantable energized medical device according to any one of aspects 59 – 65, wherein the controller is configured to transmit information based on sensor input to a device external to the body of the patient. 67. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least a portion of an operation device for operating an implantable body engaging portion. 68. The implantable energized medical device according to aspect 67, wherein the second portion comprises at least one electrical motor. 69. The implantable energized medical device according to clam 68, wherein the second portion comprises a transmission configured to reduce the velocity and increase the force of the movement generated by the electrical motor. 70. The implantable energized medical device according to clam 69, wherein the transmission is configured to transfer a week force with a high velocity into a stronger force with lower velocity. 71. The implantable energized medical device according to 69 or 70, wherein the transmission is configured to transfer a rotating force into a linear force.72. The implantable energized medical device according to any one of aspects 69 – 71, wherein the transmission comprises a gear system.73. The implantable energized medical device according to any one of aspects 68 – 72, wherein the second portion comprises a magnetic coupling for transferring mechanical work from the electrical motor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housing enclosing at least the second portion. 74. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least one hydraulic pump. 75. The implantable energized medical device according to aspect 74, wherein the hydraulic pump comprises a pump comprising at least one compressible hydraulic reservoir.76. The implantable energized medical device according to any one of aspects 68 – 75, further comprising a capacitor connected to at least one of the first and second energy storage unit and connected to the electrical motor, wherein the capacitor is configured to: be charged by at least one of the first and second energy storage units, and provide the electrical motor with electrical power.77. The implantable energized medical device according to any one of the preceding aspects, wherein at least one of the first and second portion comprises a sensation generator adapted to generate a sensation detectable by a sense of the patient. 78. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a force transferring element configured to mechanically transfer force from the second portion to an implanted body engaging portion. 79. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a force transferring element configured to hydraulically transfer force from the second portion to an implanted body engaging portion. 80. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least one lead for transferring electrical energy and/or information from the second portion to an implanted body engaging portion. 81. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises an injection port for injecting fluid into the first portion. 82. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion comprises a conduit for transferring a fluid from the first portion to the second portion. 83. The implantable energized medical device according to aspect 82, wherein the conduit is arranged to extend through the hollow portion of the connecting portion. 84. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a first and a second chamber separated from each other, wherein the first chamber comprises a first liquid and the second chamber comprises a second liquid, and wherein the second liquid is a hydraulic liquid configured to transfer force to an implantable element configured to exert force on the body portion of the patient. 85. The implantable operation device according to aspect 84, wherein a wall portion of the first chamber is resilient to allow an expansion of the first chamber. 86. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a first hydraulic system in fluid connection with a first hydraulically operable implantable element configured to exert force on the body portion of the patient, and a second hydraulic system in fluid connection with a second hydraulically operable implantable element configured to exert force on the body portion of the patient, wherein the first and second hydraulically operable implantable elements are adjustable independently from each other. 87. The implantable energized medical device according to aspect 86, wherein the first hydraulic system comprises a first hydraulic pump and the second hydraulic systems comprises a second hydraulic pump. 88. The implantable energized medical device according to aspect 86 or 87, wherein each of the first and second hydraulic systems comprises a reservoir for holding hydraulic fluid.89. The implantable energized medical device according to any one of aspects 86 – 88, further comprising a first pressure sensor configured to sense a pressure in the first hydraulic system, and a second pressure sensor configured to sense a pressure in the second hydraulic system. 90. The implantable energized medical device according to any one of the preceding aspects, wherein the first surface is configured to engage the first tissue surface of the first side of the tissue portion. 91. The implantable energized medical device according to any one of the preceding aspects, wherein the first, second and third planes are parallel to a major extension plane of the tissue. 92. The implantable energized medical device according to any one of the preceding aspects, wherein the fourth plane is parallel to a major extension plane of the tissue. 93. An implantable device for exerting a force on a body portion of a patient comprising: the implantable energized medical device according to any one of aspects1 – 92, an implantable element configured to exert a force on a body portion of the patient. 94. The implantable device according to aspect 93, wherein the implantable element comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 95. The implantable device according to aspect 93, wherein the implantable a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.96. The implantable device according to aspect 93, , wherein the implantable element comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.97. The implantable device according to aspect 93, wherein the implantable element an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device isconfigured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. ASPECT_375-Electro_Subcutaneous_Control_Pop-Rivet2_Cross1. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion has a third cross-sectional area in a third plane and is configured to connect the first portion to the second portion, wherein: the first, second and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first cross-sectional area has a first cross-sectional distance and a second cross-sectional distance, the first and second cross-sectional distances being perpendicular to each other and the first cross-sectional distance being longer than the second cross-sectional distance, the second cross-sectional area has a first cross-sectional distance and a second cross-sectional distance, the first and second cross-sectional distances being perpendicular to each other and the first cross-sectional distance being longer than the second cross-sectional distance, the first cross-sectional distance of the first cross-sectional area and the first cross-sectional distance of the second cross-sectional area are rotationally displaced in relation to each other with an angle exceeding 45° to facilitate insertion of the second portion through the hole in the tissue portion. 2. The implantable energized medical device according to aspect 1, wherein the first cross-sectional distance of the first cross-sectional area and the first cross-sectional distance of the second cross-sectional area are rotationally displaced in relation to each other with an angle exceeding 60° to facilitate insertion of the second portion through the hole in the tissue portion. 3. The implantable energized medical device according to aspect 2, wherein the first cross-sectional distance of the first cross-sectional area and the first cross-sectional distance of the second cross-sectional area are substantially perpendicular to each other to facilitate insertion of the second portion through the hole in the tissue portion.4. The implantable energized medical device according to anyone of the preceding aspects, wherein the first cross-sectional distance of the first cross-sectional area and the first cross-sectional distance of the second cross-sectional area are rotationally displaced in relation to each other with an angle exceeding 45° and being less than 135°. 5. The implantable energized medical device according to any one of the preceding aspects, wherein the cross-sectional area of the first portion is elongated. 6. The implantable energized medical device according to any one of the preceding aspects, wherein the cross-sectional area of the second portion is elongated. 7. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion is connected eccentrically to the second portion. 8. The implantable energized medical device according to aspect 6, wherein the first cross-sectional distance of the second portion is divided into a first, second and third equal length-portions, and wherein the connecting portion is connected to the second portion along the first length-portion of the first cross-sectional distance. 9. The implantable energized medical device according to any one of the preceding aspects, wherein the first cross-sectional area of the first portion is elongated. 10. The implantable energized medical device according to any one of the preceding aspects, wherein the second cross-sectional area of the second portion is elongated.11. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first wireless energy receiver configured to receive energy transmitted wirelessly from an external wireless energy transmitter. 12. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises an internal wireless energy transmitter. 13. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second wireless energy receiver. 14. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first energy storage unit. 15. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second energy storage unit. 16. The implantable energized medical device according to aspect 14 or 15, wherein at least one of the first and second energy storage unit is a solid-state battery. 17. The implantable energized medical device according to aspect 16, wherein the solid-state battery is a thionyl-chloride battery.18. The implantable energized medical device according to any one of aspects 11 – 17, wherein: the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter, and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. 19. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first controller comprising at least one processing unit. 20. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second controller comprising at least one processing unit.21. The implantable energized medical device according to aspect 19 or 20, wherein at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device.22. The implantable energized medical device according to any one of aspects 19 – 21, wherein: the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion.23. The implantable energized medical device according to aspect 50, wherein the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion.24. The implantable energized medical device according to any one of aspects 11 – 23, wherein the first wireless energy receiver comprises a first coil and the internal wireless energy transmitter comprises a second coil.25. The implantable energized medical device according to any one of aspects 11 – 24, wherein the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion. 26. The implantable energized medical device according to aspect 24 or 25, wherein at least one of the coils are embedded in a ceramic material. 27. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. 28. The implantable energized medical device according to aspect 27, wherein the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. 29. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured toenclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. 30. The implantable energized medical device according to aspect 29, wherein the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. 31. The implantable energized medical device according to any one of the preceding aspects further comprising at least one sensor for providing input to at least one of the first and second controller. 32. The implantable energized medical device according to aspect 31, wherein the sensor is a sensor configured to sense a physical parameter of the implantable energized medical device. 33. The implantable energized medical device according to aspect 32, wherein the sensor is a sensor configured to sense at least one of: a temperature of the implantable energized medical device or of a body engaging portion, a parameter related to the power consumption of the implantable energized medical device or of a body engaging portion, a parameter related to a status of at least one of the first and second energy storage unit, a parameter related to the wireless transfer of energy from a source external to the body of the patient, and a hydraulic pressure.34. The implantable energized medical device according to 31 – 33, wherein the sensor is a sensor configured to sense a physiological parameter of the patient. 35. The implantable energized medical device according to aspect 34, wherein the sensor is a sensor configured to sense at least one of: a parameter related to the patient swallowing, a local temperature, a systemic temperature, blood saturation, blood oxygenation, blood pressure, a parameter related to an ischemia marker, and pH. 36. The implantable energized medical device according to aspect 35, wherein the sensor configured to sense a parameter related to the patient swallowing comprises at least one of: a motility sensor, a sonic sensor, an optical sensor, and a strain sensor. 37. The implantable energized medical device according to aspect 35, wherein the sensor configured to sense pH is configured to sense the acidity in the stomach.38. The implantable energized medical device according to any one of aspects 31 – 37, wherein the controller is configured to transmitinformation based on sensor input to a device external to the body of the patient. 39. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least a portion of an operation device for operating an implantable body engaging portion. 40. The implantable energized medical device according to aspect 39, wherein the second portion comprises at least one electrical motor.41. The implantable energized medical device according to clam 40, wherein the second portion comprises a transmission configured to reduce the velocity and increase the force of the movement generated by the electrical motor. 42. The implantable energized medical device according to clam 41, wherein the transmission is configured to transfer a week force with a high velocity into a stronger force with lower velocity. 43. The implantable energized medical device according to 41 or 42, wherein the transmission is configured to transfer a rotating force into a linear force.44. The implantable energized medical device according to any one of aspects 41 – 43, wherein the transmission comprises a gear system.45. The implantable energized medical device according to any one of aspects 40 – 44, wherein the second portion comprises a magnetic coupling for transferring mechanical work from the electrical motor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housing enclosing at least the second portion. 46. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least one hydraulic pump. 47. The implantable energized medical device according to aspect 46, wherein the hydraulic pump comprises a pump comprising at least one compressible hydraulic reservoir.48. The implantable energized medical device according to any one of aspects 40 – 47, further comprising a capacitor connected to at leastone of the first and second energy storage unit and connected to the electrical motor, wherein the capacitor is configured to: be charged by at least one of the first and second energy storage units, and provide the electrical motor with electrical power. 49. The implantable energized medical device according to any one of the preceding aspects, wherein at least one of the first and second portion comprises a sensation generator adapted to generate a sensation detectable by a sense of the patient. 50. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a force transferring element configured to mechanically transfer force from the second portion to an implanted body engaging portion. 51. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a force transferring element configured to hydraulically transfer force from the second portion to an implanted body engaging portion.52. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least one lead for transferring electrical energy and/or information from the second portion to an implanted body engaging portion. 53. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises an injection port for injecting fluid into the first portion. 54. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion comprises a conduit for transferring a fluid from the first portion to the second portion. 55. The implantable energized medical device according to aspect 54, wherein the conduit is arranged to extend through the hollow portion of the connecting portion.56. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a first and a second chamber separated from each other, wherein the first chamber comprises a first liquid and the second chamber comprises a second liquid, and wherein the second liquid is a hydraulic liquid configured to transfer force to an implantable element configured to exert force on the body portion of the patient. 57. The implantable operation device according to aspect 56, wherein a wall portion of the first chamber is resilient to allow an expansion of the first chamber. 58. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a first hydraulic system in fluid connection with a first hydraulically operable implantable element configured to exert force on the body portion of the patient, and a second hydraulic system in fluid connection with a second hydraulically operable implantable element configured to exert force on the body portion of the patient, wherein the first and second hydraulically operable implantable elements are adjustable independently from each other.59. The implantable energized medical device according to aspect 58, wherein the first hydraulic system comprises a first hydraulic pump and the second hydraulic systems comprises a second hydraulic pump. 60. The implantable energized medical device according to aspect 58 or 59, wherein each of the first and second hydraulic systems comprises a reservoir for holding hydraulic fluid.61. The implantable energized medical device according to any one of aspects 86 – 88, further comprising a first pressure sensorconfigured to sense a pressure in the first hydraulic system, and a second pressure sensor configured to sense a pressure in the second hydraulic system. 62. The implantable energized medical device according to any one of the preceding aspects, wherein the first surface is configured toengage the first tissue surface of the first side of the tissue portion. 63. The implantable energized medical device according to any one of the preceding aspects, wherein the first, second and third planes are parallel to a major extension plane of the tissue. 64. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion further comprises a fourt cross-sectional area in a fourth plane, wherein the fourt plane is parallel to the first, second and third planes, and wherein the third cross-sectional area is smaller than the fourth cross-sectional area. 65. The implantable energized medical device according to aspect 64, wherein the connecting portion comprises a protruding element comprising the fourth cross-sectional area. 66. The implantable energized medical device according to aspect 64 or 65, wherein the fourth plane is parallel to a major extension plane of the tissue.67. The implantable energized medical device according to any one of the preceding aspects, wherein a connecting interface between the connecting portion and the second portion is excentric with respect to the second portion. 68. An implantable device for exerting a force on a body portion of a patient comprising: the implantable energized medical device according to any one of aspects1 – 67, an implantable element configured to exert a force on a body portion of the patient. 69. The implantable device according to aspect 68, wherein the implantable element comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall.70. The implantable device according to aspect 68, wherein the implantable a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.71. The implantable device according to aspect 68, wherein the implantable element comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unitcomprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.72. The implantable device according to aspect 68, wherein the implantable element an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. ASPECT_376-Electro_Subcutaneous_Control_Pop-Rivet2_Ceramic-Coils 1. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and secondportion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, at least one of the first portion and the second portion comprises at least one coil embedded in a ceramic material, the at least one coil being configured for at least one of: receiving energy transmitted wirelessly, transmitting energy wirelessly, receiving wireless communication, and transmitting wireless communication. 2. The implantable energized medical device according to aspect 1, wherein the first portion comprises a first wireless energy receiver configured to receive energy transmitted wirelessly from an external wireless energy transmitter. 3. The implantable energized medical device according to aspect 1 or 2, wherein the first portion comprises a first wireless communication receiver. 4. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a coil embedded in a ceramic material, hereinafter referred to as a first coil. 5. The implantable energized medical device according to aspect 4, wherein the first wireless energy receiver comprises the first coil. 6. The implantable energized medical device according to aspect 4 or 5, wherein the first wireless communication receiver comprises the first coil. 7. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a distal end and a proximal end with respect to the connecting portion, along a direction perpendicular to the first plane. 8. The implantable energized medical device according to aspect 7, wherein the first coil is arranged at the distal end of the first portion. 9. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises an internal wireless energy transmitter. 10. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first wireless communication transmitter. 11. The implantable energized medical device according to aspect 6, wherein the first portion comprises a coil embedded in a ceramic material, hereinafter referred to as a second coil.12. The implantable energized medical device according to aspect 11, wherein the internal wireless energy transmitter comprises the second coil. 13. The implantable energized medical device according to aspect 11 or 12, wherein the first wireless communication transmitter comprises the second coil.14. The implantable energized medical device according to any one of aspects 11 to 13, wherein the second coil is arranged at the proximal end of the first portion. 15. The implantable energized medical device according to aspects 2 and 9, wherein the first wireless energy receiver and the internal wireless energy transmitter comprises a single coil embedded in a ceramic material. 16. The implantable energized medical device according to aspects 3 and 10, wherein the first wireless communication receiver and the first wireless communication transmitter comprises a single coil embedded in a ceramic material.17. The implantable energized medical device according to aspects 2, 3, 9 and 10, wherein the first wireless energy receiver, the internal wireless energy transmitter, the first wireless communication receiver, and the internal wireless communication transmitter comprises a single coil embedded in a ceramic material.18. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second wireless energy receiver. 19. The implantable energized medical device according to aspect 18, wherein the second portion comprises a coil embedded in a ceramic material, hereinafter referred to as a third coil, wherein the second wireless energy receiver comprises the third coil. 20. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a distal end and a proximal end with respect to the connecting portion, along a direction perpendicular to the first plane. 21. The implantable energized medical device according to aspect 20, wherein the third coil is arranged at the proximal end of the second portion. 22. The implantable energized medical device according any one of the preceding aspects, wherein the first portion comprises a first energy storage unit. 23. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second energy storage unit. 24. The implantable energized medical device according to aspects 22 and 23, wherein: the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter, and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. 25. The implantable energized medical device according to aspects 22 and 23, wherein the first energy storage unit is configured to store less energy than the second energy storage unit, and configured to be charged faster than the second energy storage unit. 26. The implantable energized medical device according to aspect 25, wherein the first energy storage unit has lower energy density than the second energy storage unit. 27. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. 28. The implantable energized medical device according to aspect 27, wherein the portion of the housing made from a ceramic material comprises the at least one coil embedded in the ceramic material. 29. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured to enclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. 30. The implantable energized medical device according to aspect 29, wherein the portion of the housing made from a ceramic material comprises the at least one coil embedded in the ceramic material. 31. The implantable energized medical device according to any one of the preceding aspects further comprising at least one sensor for providing input to at least one of the first and second controller. 32. The implantable energized medical device according to aspect 31, wherein the sensor is a sensor configured to sense a physical parameter of the implantable energized medical device. 33. The implantable energized medical device according to aspect 32, wherein the sensor is a sensor configured to sense at least one of: a temperature of the implantable energized medical device or of a body engaging portion, a parameter related to the power consumption of the implantable energized medical device or of a body engaging portion, a parameter related to a status of at least one of the first and second energy storage unit, a parameter related to the wireless transfer of energy from a source external to the body of the patient, and a hydraulic pressure.34. The implantable energized medical device according to 31 – 33, wherein the sensor is a sensor configured to sense a physiological parameter of the patient. 35. The implantable energized medical device according to aspect 34, wherein the sensor is a sensor configured to sense at least one of: a parameter related to the patient swallowing, a local temperature, a systemic temperature, blood saturation, blood oxygenation, blood pressure, a parameter related to an ischemia marker, and pH. 36. The implantable energized medical device according to aspect 35, wherein the sensor configured to sense a parameter related to the patient swallowing comprises at least one of: a motility sensor, a sonic sensor, an optical sensor, and a strain sensor. 37. The implantable energized medical device according to aspect 35, wherein the sensor configured to sense pH is configured to sense the acidity in the stomach.38. The implantable energized medical device according to any one of aspects 31 – 37, wherein the controller is configured to transmit information based on sensor input to a device external to the body of the patient. 39. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least a portion of an operation device for operating an implantable body engaging portion. 40. The implantable energized medical device according to aspect 39, wherein the second portion comprises at least one electrical motor. 41. The implantable energized medical device according to clam 40, wherein the second portion comprises a transmission configured to reduce the velocity and increase the force of the movement generated by the electrical motor. 42. The implantable energized medical device according to clam 41, wherein the transmission is configured to transfer a week force with a high velocity into a stronger force with lower velocity. 43. The implantable energized medical device according to 41 or 42, wherein the transmission is configured to transfer a rotating force into a linear force.44. The implantable energized medical device according to any one of aspects 41 – 43, wherein the transmission comprises a gear system.45. The implantable energized medical device according to any one of aspects 40 – 44, wherein the second portion comprises a magnetic coupling for transferring mechanical work from the electrical motor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housing enclosing at least the second portion. 46. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least one hydraulic pump. 47. The implantable energized medical device according to aspect 46, wherein the hydraulic pump comprises a pump comprising at least one compressible hydraulic reservoir.48. The implantable energized medical device according to any one of aspects 40 – 47, further comprising a capacitor connected to at least one of the first and second energy storage unit and connected to the electrical motor, wherein the capacitor is configured to: be charged by at least one of the first and second energy storage units, and provide the electrical motor with electrical power.49. The implantable energized medical device according to any one of the preceding aspects, wherein at least one of the first and second portion comprises a sensation generator adapted to generate a sensation detectable by a sense of the patient. 50. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a force transferring element configured to mechanically transfer force from the second portion to an implanted body engaging portion. 51. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a force transferring element configured to hydraulically transfer force from the second portion to an implanted body engaging portion. 52. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at leastone lead for transferring electrical energy and/or information from the second portion to an implanted body engaging portion. 53. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises an injection port for injecting fluid into the first portion. 54. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion comprises a conduit for transferring a fluid from the first portion to the second portion. 55. The implantable energized medical device according to aspect 54, wherein the conduit is arranged to extend through the hollow portion of the connecting portion. 56. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a firstand a second chamber separated from each other, wherein the first chamber comprises a first liquid and the second chamber comprises a second liquid, and wherein the second liquid is a hydraulic liquid configured to transfer force to an implantable element configured to exert force on the body portion of the patient. 57. The implantable operation device according to aspect 56, wherein a wall portion of the first chamber is resilient to allow an expansion of the first chamber.58. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a first hydraulic system in fluid connection with a first hydraulically operable implantable element configured to exert force on the body portion of the patient, and a second hydraulic system in fluid connection with a second hydraulically operable implantable element configured to exert force on the body portion of the patient, wherein the first and second hydraulically operable implantable elements are adjustable independently from each other. 59. The implantable energized medical device according to aspect 58, wherein the first hydraulic system comprises a first hydraulic pump and the second hydraulic systems comprises a second hydraulic pump. 60. The implantable energized medical device according to aspect 58 or 59, wherein each of the first and second hydraulic systems comprises a reservoir for holding hydraulic fluid.61. The implantable energized medical device according to any one of aspects 86 – 88, further comprising a first pressure sensor configured to sense a pressure in the first hydraulic system, and a second pressure sensor configured to sense a pressure in the second hydraulic system.62. The implantable energized medical device according to any one of the preceding aspects, wherein the first surface is configured to engage the first tissue surface of the first side of the tissue portion. 63. The implantable energized medical device according to any one of the preceding aspects, wherein the first, second and third planes are parallel to a major extension plane of the tissue. 64. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion further comprises a fourt cross-sectional area in a fourth plane, wherein the fourt plane is parallel to the first, second and third planes, and wherein the third cross-sectional area is smaller than the fourth cross-sectional area. 65. The implantable energized medical device according to aspect 64, wherein the connecting portion comprises a protruding element comprising the fourth cross-sectional area. 66. The implantable energized medical device according to aspect 64 or 65, wherein the fourth plane is parallel to a major extension plane of the tissue. 67. The implantable energized medical device according to any one of the preceding aspects, wherein a connecting interface between the connecting portion and the second portion is excentric with respect to the second portion. 68. An implantable device for exerting a force on a body portion of a patient comprising: the implantable energized medical device according to any one of aspects1 – 67, an implantable element configured to exert a force on a body portion of the patient. 69. The implantable device according to aspect 68, wherein the implantable element comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 70. The implantable device according to aspect 68, wherein the implantable a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.71. The implantable device according to aspect 68, wherein the implantable element comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.72. The implantable device according to aspect 68, wherein the implantable element an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. ASPECT_377-Electro_Subcutaneous_Control_Pop-Rivet2_Bellows 1. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, and a hermetic seal arrangement configured to enclose the connecting portion so as to prevent fluid from the patient to enter the connecting portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, and the connecting portion comprises a flexible structure enabling the connecting portion to flex. ASPECT_377-Electro_Subcutaneous_Control_Pop-Rivet2_Bellows 1. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion,a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, and a hermetic seal arrangement configured to enclose the connecting portion so as to prevent fluid from the patient to enter the connecting portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, and the connecting portion comprises a flexible structure enabling the connecting portion to flex, wherein the medical device further comprises wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. . 2. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, and a hermetic seal arrangement configured to enclose the connecting portion so as to prevent fluid from the patient to enter the connecting portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, and the connecting portion comprises a flexible structure enabling the connecting portion to flex, wherein the medical device furthercomprises wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient;a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 3. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, and a hermetic seal arrangement configured to enclose the connecting portion so as to prevent fluid from the patient to enter the connecting portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, and the connecting portion comprises a flexible structure enabling the connecting portion to flex, wherein the medical device further comprises wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, and a hermetic seal arrangement configured to enclose the connecting portion so as to prevent fluid from the patient to enter the connecting portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, and the connecting portion comprises a flexible structure enabling the connecting portion to flex, wherein the medical device further comprises wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The implantable energized medical device according to aspect any one of aspect 1-4, wherein the flexible structure is configured to allow the connecting portion to flex in more than one direction. 6. The implantable energized medical device according to aspect any one of aspect 1-5, wherein the flexible structure is configured to allow the connecting portion to flex in all directions. 7. The implantable energized medical device according to any one of the preceding aspects, wherein the flexible structure comprises a bellows. 8. The implantable energized medical device according to aspect7, wherein the bellows is a metallic bellows. 9. The implantable energized medical device according to aspect 8, wherein the metallic bellows is welded.10. The implantable energized medical device according to any one of aspects 7 to 9, wherein the bellows is a titanium bellows. 11. The implantable energized medical device according to any one of aspects 7 to 11, wherein the bellows form part of the hermetic seal arrangement. 12. The implantable energized medical device according to any one of the preceding aspects, wherein the flexible structure comprises elevated and lowered portions enabling said flexing of the connecting portion. 13. The implantable energized medical device according to aspect 9, wherein the elevated and lowered portions are configured to enable the connecting portion to be compressed and/or expanded. 14. The implantable energized medical device according to any one of the preceding aspects, wherein the flexible structure has a substantially cylindrical shape.15. The implantable energized medical device according to any one of the preceding aspects, wherein the flexible structure is configured to seal against the first portion and/or the second portion. 16. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion and the second portion are hermetically sealed from the first portion. 17. The implantable energized medical device according to aspect 17, wherein the hermetic seal arrangement encloses the connecting portion and the second portion so as to hermetically seal the connecting portion and the second portion from the first portion. 18. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first wireless energy receiver for receiving energy transmitted wirelessly by an external wireless energy transmitter, and an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion, and the second portion comprises a second wireless energy receiver configured to receive energy transmitted wirelessly by the internal wireless energy transmitter. 19. The implantable energized medical device according to aspect 18, wherein the first portion comprises a first energy storage unit connected to the first wireless energy receiver. 20. The implantable energized medical device according to any one of aspects 18 and 19, wherein the second portion comprises a secondenergy storage unit connected to the second wireless energy receiver. 21. The implantable energized medical device according to aspect 20, wherein at least one of the first and second energy storage unit is a solid-state battery. 22. The implantable energized medical device according to aspect 21, wherein the solid-state battery is a thionyl-chloride battery. 23. The implantable energized medical device according to any one of aspects 20-22, wherein: the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. 24. The implantable energized medical device according to any one of aspects 18-21, wherein the first portion comprises a first controller comprising at least one processing unit. 25. The implantable energized medical device according to any one of aspects 18-24, wherein the second portion comprises a second controller comprising at least one processing unit. 26. The implantable energized medical device according to any one of aspects 24 and 25, wherein at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device. 27. The implantable energized medical device according to any one of aspects 24 and 25, wherein: the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion.28. The implantable energized medical device according to aspect 27, wherein the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion. 29. The implantable energized medical device according to any one of aspects 18-28, wherein the first wireless energy receiver comprises a first coil and the wireless energy transmitter comprises a second coil. 30. The implantable energized medical device according to any one of aspects 18-29, wherein the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion. 31. The implantable energized medical device according to any one of aspects 29 and 30, wherein at least one of the coils are embedded in a ceramic material. 32. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. 33. The implantable energized medical device according to aspect 32, wherein the portion of the housing made from a ceramic materialcomprises at least one coil embedded in the ceramic material. 34. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured toenclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. 35. The implantable energized medical device according to aspect 34, wherein the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. 36. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion is detachably connected to at least one of the second portion and the connecting portion. 37. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion comprising a flange having a flange area being larger than a cross-section area of the hole in the tissue portion, such that the flange is hindered from travelling through the hole in the tissue portion, such that the second portion and the connecting portion can be held in position by the tissue portion of the patient also when the first portion is disconnected from the connecting portion. 38. The implantable energized medical device according to any one of the preceding aspects, wherein a connecting interface between the connecting portion and the second portion is excentric with respect to the second portion. 39. The implantable energized medical device according to any one of the preceding aspects, wherein a connecting interface between the connecting portion and the first portion is excentric with respect to the first portion. 40. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion has a first end and a second end opposing the first end, wherein the second portion has a length between the first and second end. 41. The implantable energized medical device according to aspect 40, wherein the first end and second end are separated in a direction parallel to the second plane. 42. The implantable energized medical device according to aspect 40 or 41, wherein the first and second ends comprise an elliptical point respectively. 43. The implantable energized medical device according to any one of aspects 40-42, wherein the first and second ends comprise a hemispherical end cap respectively.44. The implantable energized medical device according to any one of aspects 40-43, wherein the second portion has at least one circular cross-section along the length between the first and second end. 45. The implantable energized medical device according to any one of aspects 40-44, wherein the second portion has at least one ovalcross-section along the length between the first and second end. 46. The implantable energized medical device according to any one of aspects 40-45, wherein the second portion has at least one elliptical cross-section along the length between the first and second end. ASPECT_438_Electro_Subcutaneous_Control_Pop-Rivet2_Same-Shape-B 1. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion and the second portion are configured to be placed subcutaneously in the patient, such that the implantable energized medical device can be placed with either of the first portion and the second portion on the first side of the tissue portion, whereinthe medical device further comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 2. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a secondtissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion and the second portion are configured to be placed subcutaneously in the patient, such that the implantableenergized medical device can be placed with either of the first portion and the second portion on the first side of the tissue portion whereinthe implantable medical device further comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 3. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion and the second portion are configured to be placed subcutaneously in the patient, such that the implantable energized medical device can be placed with either of the first portion and the second portion on the first side of the tissue portion wherein the implantable medical device comprises an implantable vibration device further comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion and the second portion are configured to be placed subcutaneously in the patient, such that the implantable energized medical device can be placed with either of the first portion and the second portion on the first side of the tissue portion, wherein the implantable medical device further comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. . 5. The implantable energized medical device according to any one of aspects 1–4, wherein a height of the second portion measured in a plane perpendicular to the second plane is 15 mm or less, such as 10 mm or less, such as 7 mm or less, such as 5 mm or less. 6. The implantable energized medical device according to any one of aspects 1–5, wherein the first portion has a length in a plane parallel to the first plane, wherein the second portion has a length in a plane parallel to the second plane, and wherein the length of the first portion differ no more than 30% with regard to the length of the second portion, such as wherein the length of the first portion differ no more than 15% with regard to the length of the second portion, such as wherein the length of the first portion differ no more than 5% with regard to the length of the second portion, such as wherein the length of the first portion differ no more than 1% with regard to the length of the second portion. 7. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion has a width in a plane parallel to the first plane, wherein the second portion has a width in a plane parallel to the second plane, and wherein the width of the first portion differ no more than 30% with regard to the width of the second portion, such as wherein the width of the first portion differ nomore than 15% with regard to the width of the second portion, such as wherein the width of the first portion differ no more than 5% with regard to the width of the second portion, such as wherein the width of the first portion differ no more than 1% with regard to the width of the second portion. 8. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion has a height in a planeperpendicular to the first plane, and wherein the height of the first portion differ no more than 30% with regard to the height of the second portion, such as wherein the height of the first portion differ no more than 15% with regard to the height of the second portion, such as wherein the height of the first portion differ no more than 5% with regard to the height of the second portion, such as wherein the height of the first portion differ no more than 1% with regard to the height of the second portion. 9. The implantable energized medical device according to any one of the preceding aspects, wherein a height of the first portion measured in a plane perpendicular to the first plane is 15 mm or less, such as 10 mm or less, such as 7 mm or less, such as 5 mm or less. 10. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first wireless energy receiver for receiving energy transmitted wirelessly by an external wireless energy transmitter, and an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion, and the second portion comprises a second wireless energy receiver configured to receive energy transmitted wirelessly by the internal wireless energy transmitter. 11. The implantable energized medical device according to aspect 10, wherein the first portion comprises a first energy storage unit connected to the first wireless energy receiver. 12. The implantable energized medical device according to any one of aspects 10 and 11, wherein the second portion comprises a second energy storage unit connected to the second wireless energy receiver. 13. The implantable energized medical device according to aspect 12, wherein at least one of the first and second energy storage unit is a solid-state battery. 14. The implantable energized medical device according to aspect 13, wherein the solid-state battery is a thionyl-chloride battery. 15. The implantable energized medical device according to any one of aspects 12-14, wherein: the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. 16. The implantable energized medical device according to any one of aspects 10-15, wherein the first portion comprises a first controller comprising at least one processing unit. 17. The implantable energized medical device according to any one of aspects 10-16, wherein the second portion comprises a second controller comprising at least one processing unit. 18. The implantable energized medical device according to any one of aspects 16 and 17, wherein at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device. 19. The implantable energized medical device according to any one of aspects 16 and 17, wherein: the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion.20. The implantable energized medical device according to aspect 19, wherein the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion. 21. The implantable energized medical device according to any one of aspects 10-20, wherein the first wireless energy receiver comprises a first coil and the wireless energy transmitter comprises a second coil. 22. The implantable energized medical device according to any one of aspects 10-21, wherein the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion. 23. The implantable energized medical device according to any one of aspects 21 and 22, wherein at least one of the coils are embedded in a ceramic material. 24. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material.25. The implantable energized medical device according to aspect 24, wherein the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. 26. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured to enclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. 27. The implantable energized medical device according to aspect 26, wherein the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. 28. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion is detachably connected to at least one of the second portion and the connecting portion. 29. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion comprising a flange having a flange area being larger than a cross-section area of the hole in the tissue portion, such that the flange is hindered from travelling through the hole in the tissue portion, such that the second portion and the connecting portion can be held in position by the tissue portion of the patient also when the first portion is disconnected from the connecting portion. 30. The implantable energized medical device according to any one of the preceding aspects, wherein a connecting interface between the connecting portion and the second portion is excentric with respect to the second portion. 32. The implantable energized medical device according to any one of the preceding aspects, wherein a connecting interface between the connecting portion and the first portion is excentric with respect to the first portion.33. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion has a first end and a second end opposing the first end, wherein the second portion has a length between the first and second end. 34. The implantable energized medical device according to aspect 32, wherein the first end and second end are separated in a direction parallel to the second plane. 35. The implantable energized medical device according to aspect 32 or 33, wherein the first and second ends comprise an elliptical point respectively. 36. The implantable energized medical device according to any one of aspects 32-34, wherein the first and second ends comprise a hemispherical end cap respectively. 36. The implantable energized medical device according to any one of aspects 32-35, wherein the second portion has at least one circular cross-section along the length between the first and second end.38. The implantable energized medical device according to any one of aspects 32-36, wherein the second portion has at least one oval cross-section along the length between the first and second end. 39. The implantable energized medical device according to any one of aspects 32-37, wherein the second portion has at least one ellipticalcross-section along the length between the first and second end. ASPECT_439_Electro_Subcutaneous_Control_Pop-Rivet2_First-Portion-Polymer 1. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the second portion is hermetically sealed by means of an outer wall of the second portion comprising titanium, wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 2. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the second portion is hermetically sealed by means of an outer wall of the second portion comprising titanium, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 3. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the second portion is hermetically sealed by means of an outer wall of the second portion comprising titanium, wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the second portion is hermetically sealed by means of an outer wall of the second portion comprising titanium wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina.. 5. The implantable energized medical device according to any one of aspects 1–5, wherein the first portion comprises an outer wall comprising a polymer material. 6. The implantable energized medical device according to aspect 2, wherein the outer wall of the first portion consists of the polymer material. 7. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion is hermetically sealed with respect to the connecting portion and the first portion. 8. The implantable energized medical device according to any one of the preceding aspects, wherein the outer wall of the second portion comprises a ceramic portion integrated in, or brazed to, the titanium. 9. The implantable energized medical device according to aspect 8, wherein the ceramic portion of the second portion comprises at least one metallic lead travelling through the ceramic portion for transferring electrical energy or information from within the second portion to an outside of the second portion and/or from the outside of the second portion to an inside of the second portion.10. The implantable energized medical device according to aspect 8 or 9, wherein the at least one metallic lead is integrated in, or brazed to, the ceramic portion of the second portion, such that the at least one metallic lead can pass said ceramic portion without being further insulated. 11. The implantable energized medical device according to any one of aspects 8 to 11, wherein the connecting portion comprises an outer wall comprising titanium. 12. The implantable energized medical device according to aspect 8, wherein the outer wall of the connecting portion comprises a ceramic portion integrated in, or brazed to, the titanium. 13. The implantable energized medical device according to aspect 9, wherein the ceramic portion of the connecting portion comprises at least one metallic lead travelling through said ceramic portion for transferring electrical energy or information from within the connecting portion to an outside of the connecting portion and/or from the outside of the connecting portion to an inside of the connecting portion. 14. The implantable energized medical device according to aspect 12 or 13, wherein the at least one metallic lead is integrated in, or brazed to, the ceramic portion of the connecting portion, such that the at least one metallic lead can pass said ceramic portion without being further insulated. 15. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first wireless energy receiver for receiving energy transmitted wirelessly by an external wireless energy transmitter, and an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion, and the second portion comprises a second wireless energy receiver configured to receive energy transmitted wirelessly by the internal wireless energy transmitter. 16. The implantable energized medical device according to aspect 15, wherein the first portion comprises a first energy storage unit connected to the first wireless energy receiver. 17. The implantable energized medical device according to any one of aspects 15 and 16, wherein the second portion comprises a second energy storage unit connected to the second wireless energy receiver. 18. The implantable energized medical device according to aspect 17, wherein at least one of the first and second energy storage unit is a solid-state battery. 19. The implantable energized medical device according to aspect 15, wherein the solid-state battery is a thionyl-chloride battery. 20. The implantable energized medical device according to any one of aspects 17-19, wherein:the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter and store the received energy in the first energy storage unit,the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. 21. The implantable energized medical device according to any one of aspects 15-20, wherein the first portion comprises a first controller comprising at least one processing unit. 22. The implantable energized medical device according to any one of aspects 15-21, wherein the second portion comprises a second controller comprising at least one processing unit. 23 The implantable energized medical device according to any one of aspects 21 and 22, wherein at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device. 24. The implantable energized medical device according to any one of aspects 21 and 22, wherein: the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communicationto a second wireless communication receiver in the second portion.25. The implantable energized medical device according to aspect 23, wherein the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion. 26. The implantable energized medical device according to any one of aspects 15-25, wherein the first wireless energy receiver comprises a first coil and the wireless energy transmitter comprises a second coil. 27. The implantable energized medical device according to any one of aspects 15-26, wherein the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion.28. The implantable energized medical device according to any one of aspects 26 and 27, wherein at least one of the coils are embedded in a ceramic material. 29. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion is detachably connected to at least one of the second portion and the connecting portion.30. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion comprising a flange having a flange area being larger than a cross-section area of the hole in the tissue portion, such that the flange is hindered from travelling through the hole in the tissue portion, such that the second portion and the connecting portion can be held in position by the tissue portion of the patient also when the first portion is disconnected from the connecting portion. 30. The implantable energized medical device according to any one of the preceding aspects, wherein a connecting interface between the connecting portion and the second portion is excentric with respect to the second portion. 32. The implantable energized medical device according to any one of the preceding aspects, wherein a connecting interface between the connecting portion and the first portion is excentric with respect to the first portion. 33. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion has a first end and a second end opposing the first end, wherein the second portion has a length between the first and second end. 34. The implantable energized medical device according to aspect 33, wherein the first end and second end are separated in a direction parallel to the second plane. 35. The implantable energized medical device according to aspect 33 or 34, wherein the first and second ends comprise an elliptical point respectively. 36. The implantable energized medical device according to any one of aspects 33-35, wherein the first and second ends comprise a hemispherical end cap respectively. 37. The implantable energized medical device according to any one of aspects 33-36, wherein the second portion has at least one circular cross-section along the length between the first and second end. 38. The implantable energized medical device according to any one of aspects 33-37, wherein the second portion has at least one oval cross-section along the length between the first and second end. 39. The implantable energized medical device according to any one of aspects 33-38, wherein the second portion has at least one elliptical cross-section along the length between the first and second end. ASPECT_900_Electro_Subcutaneous_Control_Pop-Rivet2_Tapered 1. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the connecting portion and second portion are configured to form a connecting interface between the connecting portion and the second portion, the second portion extends along a first direction being parallel to the second plane, wherein the second portion has a lengthwise cross-sectional area along the first direction, wherein a second lengthwise cross-sectional area is smaller than a first lengthwise cross-sectional area and wherein the first lengthwise cross-sectional area is located closer to said connecting interface with regard to the first direction. 2. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion has a first end and a second end opposing the first end along the first direction, wherein the second portion has a length between the first and second end, and wherein the second portion has an intermediate region and a distal region, wherein the intermediate region is defined by the connecting interface between the connecting portion and the second portion, and the distal region extends from the connecting interface between the connecting portion and the second portion to the second end. 3. The implantable energized medical device according to aspect 2, wherein the lengthwise cross-sectional area of the second portion decreases continuously from an end of the intermediate region towards the second end. 4. The implantable energized medical device according to aspect 2 or 3, wherein the lengthwise cross-sectional area of the second portion decreases linearly from an end of the intermediate region towards the second end. 5. The implantable energized medical device according to aspect 2 or 3, wherein the lengthwise cross-sectional area of the second portion decreases stepwise from an end of the intermediate region towards the second end.6. The implantable energized medcial device according to any one of aspects 2 – 5, wherein the distal region of the second portion is conically shaped. 7. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion has rotational symmetry along the first direction.8. The implantable energized medical device according to any one of the preceding aspects, wherein the second surface of the second portion is substantially perpendicular to a central extension of the connecting portion. 9. The implantable energized medical device according to any one of the preceding aspects, wherein the second surface of the second portion is substantially parallel to the second plane.10. The implantable energized medical device according to any one of the preceding aspects, wherein the second surface of the second portion is substantially flat and configured to form a contact area to the second tissue surface, and wherein the second portion further comprises a lower surface facing away from the first portion configured to taper towards the second end.11. The implantable energized medical device according to any one of aspects 2 – 10, wherein the second portion has a proximal region, wherein the proximal region extends from the first end to the connecting interface between the connecting portion and the second portion.12. The implantable energized medical device according to any one of aspects 2 – 11, wherein the lengthwise cross-sectional area of the second portion decreases continuously from an end of the intermediate region towards the first end.13. The implantable energized medical device according to any one of aspects 2 – 12, wherein the lengthwise cross-sectional area of the second portion decreases linearly from an end of the intermediate region towards the first end.14. The implantable energized medical device according to any one of aspects 2 – 12, wherein the lengthwise cross-sectional area of the second portion decreases stepwise from an end of the intermediate region towards the first end.15. The implantable energized medcial device according to any one of aspects 11 – 14, wherein the proximal region of the second portion is conically shaped.16. The implantable energized medical device according to any one of aspects 2 – 15, wherein the first and second ends comprise an elliptical point respectively.17. The implantable energized medical device according to any one of aspects 2 – 15, wherein the first and second ends comprise a hemispherical end cap respectively.18. The implantable energized medical device according to any one of aspects 2 – 17, wherein the second portion has at least one circular cross-section along the length between the first and second end.19. The implantable energized medical device according to any one of aspects 2 – 18, wherein the second portion has at least one oval cross- section along the length between the first and second end.20. The implantable energized medical device according to any one of aspects 2 – 19, wherein the second portion has at least one elliptical cross-section along the length between the first and second end.21. The implantable energized medical device according to any one of aspects 2 – 20, wherein the second portion has said length in a direction being different to a central extension of the connecting portion. 22. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting interface between the connecting portion and the second portion is excentric with respect to the second portion 23. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting interface between the connecting portion and the second portion is excentric, with respect to the second portion, in the first direction, but not in a second direction being perpendicular to the first direction.24. The implantable energized medical device according to any one of aspects 1 – 22, wherein the connecting interface between the connecting portion and the second portion is excentric, with respect to the second portion, in the first direction and in a second direction being perpendicular to the first direction. 25. The implantable energized medical device according to aspect 23 or 24, wherein the second direction is parallel to the second plane.26. The implantable energized medical device according to any one of aspects 11 – 25, wherein the proximal region and the distal region comprises the second surface configured to engage the second surface of the second side of the tissue portion.27. The implantable energized medical device according to any one of aspects 2 – 26, wherein the second portion is tapered from the first end to the second end.28. The implantable energized medical device according to any one of aspects 2 – 27, wherein the second portion is tapered from the intermediate region of the second portion to each of the first end and second end. 29. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion has a maximumdimension being in the range of 10 to 40 mm, such as in the range of 10 to 30 mm, such as in the range of 15 to 25 mm. 30. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion has a diameter being in the range of 10 to 40 mm, such as in the range of 10 to 30 mm, such as in the range of 15 to 25 mm. 31. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion has a maximum dimension in the third plane in the range of 2 to 20 mm, such as in the range of 2 to 15 mm, such as in the range of 5 to 10 mm. 32. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion has a maximumdimension being in the range of 30 to 90 mm, such as in the range of 30 to 70 mm, such as in the range of 35 to 60 mm.33. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion has one or more of a spherical shape, an ellipsoidal shape, a polyhedral shape, an elongated shape, and a flat disk shape. 34. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion has one of anoval cross-section, an elongated cross-section, and a circular cross-section, in a plane parallel to the third plane.35. The implantable energized medical device according to any one of aspects 2 – 34, wherein the distal region is configured to be directed downwards in a standing patient. 36. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion has a first height, and the second portion has a second height, both heights being in a direction perpendicular to the first and second planes, wherein the first height is smaller than the second height. 37. The implantable energized medical device according to aspect 36, wherein the first height is less than 2/3 of the second height, such as less than 1/2 of the second height, such as less than 1/3 of the second height.38. The implantable energized medical device according to any one of aspects 2 – 37, wherein the second end of the second portion comprises connections for connecting to an implant being located in a caudal direction from a location of the implantable energized medical device in the patient.39. The implantable energized medical device according to any one of aspects 2 – 38, wherein the first end of the second portion comprises connections for connecting to an implant being located in a cranial direction from a location of the implantable energized medical device in the patient. 40. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion furthercomprises a fourth cross-sectional area in a fourth plane, wherein the fourth plane is parallel to the first, second and third planes, and wherein the third cross-sectional area is smaller than the fourth cross-sectional area. 41. The implantable energized medical device according to aspect 40, wherein the connecting portion comprises a protruding element comprising the fourth cross-sectional area. 42. The implantable energized medical device according to any one of the preceding aspects, wherein the first surface is configured to engage the first tissue surface of the first side of the tissue portion. 43. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first wireless energy receiver configured to receive energy transmitted wirelessly from an external wireless energy transmitter. 44. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises an internal wireless energy transmitter. 45. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second wireless energy receiver. 46. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first energy storage unit. 47. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second energy storage unit. 48. The implantable energized medical device according to aspect 46 or 47, wherein at least one of the first and second energy storage unit is a solid-state battery. 49. The implantable energized medical device according to aspect 48, wherein the solid-state battery is a thionyl-chloride battery.50. The implantable energized medical device according to any one of aspects 43 – 49, wherein: the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter, and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. 51. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first controller comprising at least one processing unit. 52. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second controller comprising at least one processing unit. 53. The implantable energized medical device according to aspect 51 or 52, wherein at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device.54. The implantable energized medical device according to any one of aspects 51 – 53, wherein: the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion. 55. The implantable energized medical device according to aspect 54, wherein the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion.56. The implantable energized medical device according to any one of aspects 43 – 55, wherein the first wireless energy receiver comprises a first coil and the internal wireless energy transmitter comprises a second coil.57. The implantable energized medical device according to any one of aspects 43 – 56, wherein the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion. 58. The implantable energized medical device according to aspect 56 or 57, wherein at least one of the coils are embedded in a ceramic material. 59. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. 60. The implantable energized medical device according to aspect 59, wherein the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. 61. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured to enclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. 62. The implantable energized medical device according to aspect 61, wherein the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. 63. The implantable energized medical device according to any one of the preceding aspects further comprising at least one sensor forproviding input to at least one of the first and second controller. 64. The implantable energized medical device according to aspect 63, wherein the sensor is a sensor configured to sense a physical parameter of the implantable energized medical device.65. The implantable energized medical device according to aspect 64, wherein the sensor is a sensor configured to sense at least one of: a temperature of the implantable energized medical device or of a body engaging portion, a parameter related to the power consumption of the implantable energized medical device or of a body engaging portion, a parameter related to a status of at least one of the first and second energy storage unit, a parameter related to the wireless transfer of energy from a source external to the body of the patient, and a hydraulic pressure.66. The implantable energized medical device according to 63 – 65, wherein the sensor is a sensor configured to sense a physiological parameter of the patient.67. The implantable energized medical device according to aspect 66, wherein the sensor is a sensor configured to sense at least one of: a parameter related to the patient swallowing, a local temperature, a systemic temperature, blood saturation, blood oxygenation, blood pressure, a parameter related to an ischemia marker, and pH. 68. The implantable energized medical device according to aspect 67, wherein the sensor configured to sense a parameter related to the patient swallowing comprises at least one of: a motility sensor, a sonic sensor, an optical sensor, and a strain sensor. 69. The implantable energized medical device according to aspect 67, wherein the sensor configured to sense pH is configured to sense the acidity in the stomach.70. The implantable energized medical device according to any one of aspects 63 – 69, wherein the controller is configured to transmit information based on sensor input to a device external to the body of the patient. 71. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least a portion of an operation device for operating an implantable body engaging portion. 72. The implantable energized medical device according to aspect 71, wherein the second portion comprises at least one electrical motor. 73. The implantable energized medical device according to clam 72, wherein the second portion comprises a transmission configured to reduce the velocity and increase the force of the movement generated by the electrical motor.74. The implantable energized medical device according to clam 73, wherein the transmission is configured to transfer a week force with a high velocity into a stronger force with lower velocity. 75. The implantable energized medical device according to 73 or 74, wherein the transmission is configured to transfer a rotating force into a linear force.76. The implantable energized medical device according to any one of aspects 73 – 75, wherein the transmission comprises a gear system.77. The implantable energized medical device according to any one of aspects 72 – 76, wherein the second portion comprises a magnetic coupling for transferring mechanical work from the electrical motor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housing enclosing at least the second portion. 78. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least one hydraulic pump. 79. The implantable energized medical device according to aspect 78, wherein the hydraulic pump comprises a pump comprising at least one compressible hydraulic reservoir.80. The implantable energized medical device according to any one of aspects 82 – 79, further comprising a capacitor connected to at leastone of the first and second energy storage unit and connected to the electrical motor, wherein the capacitor is configured to: be charged by at least one of the first and second energy storage units, and provide the electrical motor with electrical power.81. The implantable energized medical device according to any one of the preceding aspects, wherein at least one of the first and second portion comprises a sensation generator adapted to generate a sensation detectable by a sense of the patient. 85. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a force transferring element configured to mechanically transfer force from the second portion to an implanted body engaging portion.83. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a force transferring element configured to hydraulically transfer force from the second portion to an implanted body engaging portion. 84. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least one lead for transferring electrical energy and/or information from the second portion to an implanted body engaging portion. 85. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises an injection port for injecting fluid into the first portion.86. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion comprises a conduit for transferring a fluid from the first portion to the second portion. 87. The implantable energized medical device according to aspect 86, wherein the conduit is arranged to extend through the hollow portion of the connecting portion. 88. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a first and a second chamber separated from each other, wherein the first chamber comprises a first liquid and the second chamber comprises a second liquid, and wherein the second liquid is a hydraulic liquid configured to transfer force to an implantable element configured to exert force on the body portion of the patient. 89. The implantable operation device according to aspect 88, wherein a wall portion of the first chamber is resilient to allow an expansion of the first chamber. 90. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a first hydraulic system in fluid connection with a first hydraulically operable implantable element configured to exert force on the body portion of the patient, and a second hydraulic system in fluid connection with a second hydraulically operable implantable element configured to exert force on the body portion of the patient, wherein the first and second hydraulically operable implantable elements are adjustable independently from each other.91. The implantable energized medical device according to aspect 90, wherein the first hydraulic system comprises a first hydraulic pump and the second hydraulic systems comprises a second hydraulic pump.92. The implantable energized medical device according to aspect 90 or 91, wherein each of the first and second hydraulic systems comprises a reservoir for holding hydraulic fluid.93. The implantable energized medical device according to any one of aspects 90 – 9, further comprising a first pressure sensor configured to sense a pressure in the first hydraulic system, and a second pressure sensor configured to sense a pressure in the second hydraulic system. 94. The implantable energized medical device according to any one of the preceding aspects, wherein the first surface is configured to engage the first tissue surface of the first side of the tissue portion. 95. The implantable energized medical device according to any one of the preceding aspects, wherein the first, second and third planes areparallel to a major extension plane of the tissue. 96. The implantable energized medical device according to any one of the preceding aspects, wherein the fourth plane is parallel to a major extension plane of the tissue. 97. An implantable device for exerting a force on a body portion of a patient comprising: the implantable energized medical device according to any one of aspects1 – 96, an implantable element. 98. The implantable device according to claim 97, wherein the implantable element comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/orintestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 99. The implantable device according to claim 97, wherein the implantable element comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 100. The implantable device according to claim 97, wherein the implantable element,. comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 100. The implantable device according to claim 97, wherein the implantable element. comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. ASPECT_436_Electro_Subcutaneous_Control_Pop-Rivet2_First-Portion 1. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, the first portion being further configured to connect, directly or indirectly, to a second portion placed on a second side of the tissue portion opposing the first side, wherein the first portion comprises an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion, wherein the implantable medical device further comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 2. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, the first portion being further configured to connect, directly orindirectly, to a second portion placed on a second side of the tissue portion opposing the first side, wherein the first portion comprises an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.3. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, the first portion being further configured to connect, directly or indirectly, to a second portion placed on a second side of the tissue portion opposing the first side, wherein the first portion comprises an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion wherein the implantable medical device further comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.4. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, the first portion being further configured to connect, directly or indirectly, to a second portion placed on a second side of the tissue portion opposing the first side, wherein the first portion comprises an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The implantable energized medical device according to any one of aspects 1–4, wherein the first portion is configured to connect, directlyor indirectly, to the second portion, via a connecting portion configured to extend through a hole in the tissue portion, the hole extending between the first side of the tissue portion and the second side of the tissue portion. 6. The implantable energized medical device according to aspect 5, further comprising the connecting portion. 7. The implantable energized medical device according to aspect 6, wherein the connecting portion is integrally formed with the first portion. 8. The implantable energized medical device according to aspect 6, wherein the connecting portion is a separate component with regard to the first portion, the connecting portion being configured to be connected to the first portion. 9. The implantable energized medical device according to any one of aspects 5-8, wherein the first portion has a first cross-sectional area in a first plane and the connecting portion has a second cross-sectional area in a second plane, wherein the first and second planes are parallel to each other, wherein the second cross-sectional area is smaller than the first cross-sectional area, such that the first portion and the second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first and second planes. 10. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion is configured todetachably connect, directly or indirectly, to the second portion. 11. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first wireless energy receiver for receiving energy transmitted wirelessly by an external wireless energy transmitter. 12. The implantable energized medical device according to aspect 11, wherein the first portion comprises a first energy storage unit connected to the first wireless energy receiver. 13. The implantable energized medical device according to aspect 12, wherein the first energy storage unit is a solid-state battery. 14. The implantable energized medical device according to aspect 13, wherein the solid-state battery is a thionyl-chloride battery. 15. The implantable energized medical device according to any one of aspects 11-14, wherein: the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to a second wireless energy receiver in the second portion. 16. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first controller comprising at least one processing unit. 16. The implantable energized medical device according to aspect 15, wherein the first controller is connected to a wireless transceiver for communicating wirelessly with an external device. 17. The implantable energized medical device according to aspect 16, wherein: the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion. 18. The implantable energized medical device according to any one of aspects 11-18, wherein the first wireless energy receiver comprises a first coil and the wireless energy transmitter comprises a second coil. 19. The implantable energized medical device according to any one of aspects 11-18, wherein the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion.20. The implantable energized medical device according to any one of aspects 19 and 20, wherein at least one of the coils are embedded in a ceramic material.22. The implantable energized medical device according to aspect 3, wherein the connecting portion comprises a flange having a flange area being larger than a cross-section area of the hole in the tissue portion, such that the flange is hindered from travelling through the hole in the tissue portion, such that the second portion and the connecting portion can be held in position by the tissue portion of the patient also when the first portion is disconnected from the connecting portion. 23. The implantable energized medical device according to any one of the preceding aspects, wherein a connecting interface between the connecting portion and the first portion is excentric with respect to the first portion. ASPECT_434_Electro_Subcutaneous_Control_Pop-Rivet2_Decreasing-Area1. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, wherein the connecting portion and the second portion are configured to form a unit having a central axis extending from a first end of said unit to a second end of said unit, the first end being proximal to the first portion and the second end being distal to the first portion,wherein a physical footprint of said unit perpendicular to the central axis decreases continuously or stepwise from the first end to the second end of said unit,wherein the implantable energized medical device further comprises: a system for treating obesity in a patient, comprising: an implantable vibration device configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall.2. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, thesecond portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, wherein the connecting portion and the second portion are configured to form a unit having a central axis extending from a first end of said unit to a second end of said unit, the first end being proximal to the first portion and the second end being distal to the first portion,wherein a physical footprint of said unit perpendicular to the central axis decreases continuously or stepwise from the first end to the second end of said unit, wherein the implantable energized medical device further comprises: a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.3. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, thesecond portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, wherein the connecting portion and the second portion are configured to form a unit having a central axis extending from a first end of said unit to a second end of said unit, the first end being proximal to the first portion and the second end being distal to the first portion,wherein a physical footprint of said unit perpendicular to the central axis decreases continuously or stepwise from the first end to the second end of said unit, wherein the implantable energized medical device further comprises: an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.4. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and being configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional areas, such that the first portion and second portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, wherein the connecting portion and the second portion are configured to form a unit having a central axis extending from a first end of said unit to a second end of said unit, the first end being proximal to the first portion and the second end being distal to the first portion, wherein a physical footprint of said unit perpendicular to the central axis decreases continuously or stepwise from the first end to the second end of said unit, wherein the implantable energized medical device further comprises: an implantable vibration device configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina.5. The implantable energized medical device according to any one of aspects 1-4, wherein said physical footprint comprises a cross- sectional area perpendicular to the central axis.6. The implantable energized medical device according to any one of aspects 1-5 or aspect 5, wherein the connecting portion and the second portion are one of: configured to reversibly connect to each other to form said unit; or configured to irreversibly connect to each other to form said unit; or configured as a single body forming said unit.7. The implantable energized medical device according to any one of the preceding aspects, wherein said unit comprises an angled section forming a bend in said unit.8. The implantable energized medical device according to aspect 7, wherein the bend is between 15° and 165°, such as between 30° and 150°, such as between 45° and 135°, such as substantially 90°.9. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first wireless energy receiver for receiving energy transmitted wirelessly by an external wireless energy transmitter, and an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion, andthe second portion comprises a second wireless energy receiver configured to receive energy transmitted wirelessly by the internal wireless energy transmitter.10. The implantable energized medical device according to aspect 9, wherein the first portion comprises a first energy storage unit connected to the first wireless energy receiver.11. The implantable energized medical device according to any one of aspects 9 and 10, wherein the second portion comprises a second energy storage unit connected to the second wireless energy receiver.12. The implantable energized medical device according to aspect 11, wherein at least one of the first and second energy storage unit is a solid-state battery.13. The implantable energized medical device according to aspect 12, wherein the solid-state battery is a thionyl-chloride battery.14. The implantable energized medical device according to any one of aspects 11-13, wherein: the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit.15. The implantable energized medical device according to any one of aspects 9-14, wherein the first portion comprises a first controller comprising at least one processing unit.16. The implantable energized medical device according to any one of aspects 9-15, wherein the second portion comprises a second controller comprising at least one processing unit.17. The implantable energized medical device according to any one of aspects 15 and 16, wherein at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device.18. The implantable energized medical device according to any one of aspects 15 and 16, wherein: the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion.19. The implantable energized medical device according to aspect 18, wherein the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion.20. The implantable energized medical device according to any one of aspects 9-19, wherein the first wireless energy receiver comprises a first coil and the wireless energy transmitter comprises a second coil.21. The implantable energized medical device according to any one of aspects 9-20, wherein the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion.22. The implantable energized medical device according to any one of aspects 20 and 21, wherein at least one of the coils are embedded in a ceramic material.23. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material.24. The implantable energized medical device according to aspect 23, wherein the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material.25. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured to enclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material.26. The implantable energized medical device according to aspect 25, wherein the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material.27. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion is detachably connected to at least one of the second portion and the connecting portion.28. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion comprising a flange having a flange area being larger than a cross-section area of the hole in the tissue portion, such that the flange is hindered from travelling through the hole in the tissue portion, such that the second portion and the connecting portion can be held in position by the tissue portion of the patient also when the first portion is disconnected from the connecting portion.29. The implantable energized medical device according to any one of the preceding aspects, wherein a connecting interface between the connecting portion and the second portion is excentric with respect to the second portion.30. The implantable energized medical device according to any one of the preceding aspects, wherein a connecting interface between the connecting portion and the first portion is excentric with respect to the first portion.31. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion has a first end and a second end opposing the first end, wherein the second portion has a length between the first and second end.32. The implantable energized medical device according to aspect 31, wherein the first end and second end are separated in a direction parallel to the second plane.33. The implantable energized medical device according to aspect 31 or 32, wherein the first and second ends comprise an elliptical point respectively.34. The implantable energized medical device according to any one of aspects 31-33, wherein the first and second ends comprise a hemispherical end cap respectively.35. The implantable energized medical device according to any one of aspects 31-34, wherein the second portion has at least one circular cross-section along the length between the first and second end.36. The implantable energized medical device according to any one of aspects 31-35, wherein the second portion has at least one oval cross-section along the length between the first and second end.37. The implantable energized medical device according to any one of aspects 31-36, wherein the second portion has at least one elliptical cross-section along the length between the first and second end.38. The implantable energized medical device according to any one of the preceding aspects, further comprising a gear arrangement and an electric motor, wherein the gear arrangement is configured to reduce the velocity and increase the force of the movement generated by the electric motor.39. The implantable energized medical device according to aspect 35, wherein the gear arrangement is configured to transfer aforce with a high velocity into a stronger force with lower velocity.40. The implantable energized medical device according to aspect 38 or 39, wherein the gear arrangement is configured to transfer a rotating force into a linear force.41. The implantable energized medical device according to any one of aspects 38-40, wherein the gear arrangement comprises a gear system.42. The implantable energized medical device according to any one of aspects 38-41, wherein the second portion comprises a magnetic coupling for transferring mechanical work from the electric motor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housing enclosing at least the second portion.43. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least one hydraulic pump.44. The implantable energized medical device according to aspect 43, wherein the hydraulic pump comprises a pump comprising at least one compressible hydraulic reservoir. ASPECT_901_Electro_Subcutaneous_Control_Pop-Rivet2_Increase-Area 1. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, and the first portion is configured to be movable in relation to the connecting portion, and/or comprises a first element and a second element, the first element being configured to be moved in relation to the second element to increase an area of the first surface, wherein the implantable energized medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 2. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional area, such that the first portion, second portion andconnecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, and the first portion is configured to be movable in relation to the connecting portion, and/or comprises a first element and a second element, the first element being configured to be moved in relation to the second element to increase an area of the first surface, wherein the implantable energized medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 3. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, and the first portion is configured to be movable in relation to the connecting portion, and/or comprises a first element and a second element, the first element being configured to be moved in relation to the second element to increase an area of the first surface, wherein the implantable energized medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side,the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the first and second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, and the first portion is configured to be movable in relation to the connecting portion, and/or comprises a first element and a second element, the first element being configured to be moved in relation to the second element to increase an area of the first surface,wherein the implantable energized medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion is configured to extend along a central extension between the first portion and the second portion, and wherein the first portion is configured to be moveable to assume several positions along a direction perpendicular to the central extension. 6. The implantable energized medical device according to aspect 5, wherein the first portion is configured to be fixed in the several positions by a locking mechanism arranged on either or both of the first portion and connecting portion. 7. The implantable energized medical device according to any of the preceding aspects, wherein the first element is configured to assume a first state, wherein the first element is arranged on top of the second element or within the second element, and a second state, wherein the first element is arranged adjacent to the second element. 8. The implantable energized medical device according to aspect 7, wherein the first element is hingedly connected to the second element. 9. The implantable energized medical device according to aspect 7, wherein the first element and the second element are integrally formed, and wherein the first portion is flexible to allow the first element to fold over the second element to assume the first state. 10. The implantable energized medical device according to aspect 7, wherein the second element comprises a slot, and wherein the first element is configured to be partially or fully housed within the slot in the first state, and wherein the first element is configured to protrude from the slot in the second state. 11. The implantable energized medical device according to aspect 7, wherein the first element comprises a slot, and wherein the secondelement is configured to be partially or fully housed within the slot in a first state of the second element, and wherein the second element is configured to protrude from the slot in a second state of the second element.12. The implantable energized medical device according to any one of aspects 5 to 11, wherein the first element is configured to rotate about an axis being parallel to said central extension. 13. The implantable energized medical device according to aspect 12, wherein the first element is configured to rotate up to a maximum of 180 degrees about the axis.14. The implantable energized medical device according to aspect 12, wherein the first element is configured to rotate up to a maximum of 90 degrees about the axis. 15. The implantable energized medical device according to any one of the preceding aspects, wherein the second element is configured to be connected to the connecting portion. 16. The implantable energized medical device according to any one of the preceding aspects, wherein the first element is configured to be moved in relation to the second element to protrude or to further protrude beyond an edge of the second element to increase an area of the first surface. 17. The implantable energized medical device according to any one of the preceding aspects, wherein the second element is movable in relation to the first element to increase an area of the first surface. 18. The implantable energized medical device according to aspect 17, wherein the first element and the second element are configured to be moved from a first state, wherein ends of the first and second elements respectively point in a direction substantially perpendicular to thefirst plane, to a second state, wherein said ends of the first and second ends point in one or more directions being substantially parallel to the first plane. 19. The implantable energized medical device according to aspect 18, wherein the first element and the second element are configured to assume an upright position extending away from the connecting portion, and to be moved towards a sideways position being substantially perpendicular to the upright position. 20. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion comprises a protruding element and the first portion comprises a slot, wherein the protruding element is configured to slide within the slot along a predetermined path. 18. The implantable energized medical device according to aspect 17, wherein the protruding element is configured to be interlocked within the slot such that the protruding element can only be removed from the slot in a preconfigured position. 21. The implantable energized medical device according to aspect 19 or 20, wherein the protruding element is configured to be interlocked within the slot such that the protruding element is permanently enclosed within the slot, or wherein the protruding element is configured to be interlocked within the slot such that the protruding element is permanently enclosed within the slot. 22. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion furthercomprises a fourth cross-sectional area in a fourth plane, wherein the fourth plane is parallel to the first, second and third planes, and wherein the third cross-sectional area is smaller than the fourth cross-sectional area.23. The implantable energized medical device according to aspect 22, wherein the connecting portion comprises a protruding element comprising the fourth cross-sectional area. 24. The implantable energized medical device according to aspect 22 or 23, wherein the connecting portion comprises a flange comprising the fourth cross-sectional area, such that the flange is prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes. 25. The implantable energized medical device according to aspect 24, wherein the flange protrudes in a direction parallel to the first, second, third and fourth planes, and perpendicular to a central extension of the connecting portion. 26. The implantable energized medical device according to aspect 24 or 25, wherein the flange comprises the third surface configured to engage the first tissue surface of the first side of the tissue portion. 27. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first wireless energy receiver configured to receive energy transmitted wirelessly from an external wireless energy transmitter. 28. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises an internal wireless energy transmitter. 29. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second wireless energy receiver.30. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first energy storage unit. 31. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second energy storage unit. 32. The implantable energized medical device according to aspect 30 or 31, wherein at least one of the first and second energy storage unit is a solid-state battery. 33. The implantable energized medical device according to aspect 32, wherein the solid-state battery is a thionyl-chloride battery.34. The implantable energized medical device according to any one of aspects 26 – 33, wherein: the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter, and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit.35. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first controller comprising at least one processing unit. 36. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second controller comprising at least one processing unit.37. The implantable energized medical device according to any one of aspects 33 and 34, wherein at least one of the first and secondcontroller is connected to a wireless transceiver for communicating wirelessly with an external device.38. The implantable energized medical device according to any one of aspects 35 – 37, wherein: the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion.39. The implantable energized medical device according to aspect 38, wherein the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion.40. The implantable energized medical device according to any one of aspects 27 – 39, wherein the first wireless energy receiver comprises a first coil and the internal wireless energy transmitter comprises a second coil.41. The implantable energized medical device according to any one of aspects 27 – 40, wherein the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion. 42. The implantable energized medical device according to aspect 40 or 41, wherein at least one of the coils are embedded in a ceramic material. 43. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. 44. The implantable energized medical device according to aspect 41, wherein the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. 45. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured toenclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material.46. The implantable energized medical device according to aspect 45, wherein the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. 47. The implantable energized medical device according to any one of the preceding aspects further comprising at least one sensor for providing input to at least one of the first and second controller. 48. The implantable energized medical device according to aspect 47, wherein the sensor is a sensor configured to sense a physicalparameter of the implantable energized medical device. 49. The implantable energized medical device according to aspect 48, wherein the sensor is a sensor configured to sense at least one of: a temperature of the implantable energized medical device or of a body engaging portion, a parameter related to the power consumption of the implantable energized medical device or of a body engaging portion, a parameter related to a status of at least one of the first and second energy storage unit, a parameter related to the wireless transfer of energy from a source external to the body of the patient, and a hydraulic pressure.50. The implantable energized medical device according to 47 – 49, wherein the sensor is a sensor configured to sense a physiological parameter of the patient. 51. The implantable energized medical device according to aspect 50, wherein the sensor is a sensor configured to sense at least one of: a parameter related to the patient swallowing, a local temperature, a systemic temperature, blood saturation, blood oxygenation, blood pressure, a parameter related to an ischemia marker, and pH. 52. The implantable energized medical device according to aspect 51, wherein the sensor configured to sense a parameter related to the patient swallowing comprises at least one of: a motility sensor, a sonic sensor, an optical sensor, and a strain sensor. 53. The implantable energized medical device according to aspect 51, wherein the sensor configured to sense pH is configured to sense the acidity in the stomach.55. The implantable energized medical device according to any one of aspects 47 – 53, wherein the controller is configured to transmit information based on sensor input to a device external to the body of the patient. 55. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least a portion of an operation device for operating an implantable body engaging portion. 56. The implantable energized medical device according to aspect 55, wherein the second portion comprises at least one electrical motor. 57. The implantable energized medical device according to clam 56, wherein the second portion comprises a transmission configured to reduce the velocity and increase the force of the movement generated by the electrical motor. 58. The implantable energized medical device according to clam 57, wherein the transmission is configured to transfer a week force with a high velocity into a stronger force with lower velocity. 59. The implantable energized medical device according to 57 or 58, wherein the transmission is configured to transfer a rotating force into a linear force. ASPECT_902_Electro_Subcutaneous_Control_Pop-Rivet2_VLF-internal 1. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side,the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion is configured to receive electromagnetic waves at a frequency above a frequency level, and/or to transmit electromagnetic waves at a frequency below the frequency level, wherein the second portion is configured to receive and/or transmit electromagnetic waves at a frequency below the frequency level, and wherein the frequency level is 100 kHz, wherein the implantable energized medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 2. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured toengage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other,the third cross-sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion is configured to receive electromagnetic waves at a frequency above a frequency level, and/or to transmit electromagnetic waves at a frequency below the frequency level, wherein the second portion is configured to receive and/or transmit electromagnetic waves at a frequency below the frequency level, and wherein the frequency level is 100 kHz, wherein the implantable energized medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 3. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion is configured to receive electromagnetic waves at a frequency above a frequency level, and/or to transmit electromagnetic waves at a frequency below the frequency level, wherein the second portion is configured to receive and/or transmit electromagnetic waves at a frequency below the frequency level, and wherein the frequency level is 100 kHz,wherein the implantable energized medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion is configured to receive electromagnetic waves at a frequency above a frequency level, and/or to transmit electromagnetic waves at a frequency below the frequency level, wherein the second portion is configured to receive and/or transmit electromagnetic waves at a frequency below the frequency level, and wherein the frequency level is 100 kHz, wherein the implantable energized medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The implantable energized medical device according any one of the preceding aspects, wherein the first portion is configured to transmit electromagnetic waves at the frequency below the frequency level to the second portion. 6. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion is configured to transmit electromagnetic waves at the frequency above the frequency level to an external device. 7. The implantable energized medical device according to any one of the preceding aspects, wherein the frequency level is 40 kHz or 20 kHz. 8. The implantable energized medical device according to any one of the preceding aspects, wherein the electromagnetic waves comprise wireless energy and/or wireless communication. 9. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first wireless energy receiver for receiving energy transmitted wirelessly by an external wireless energy transmitter above the frequency level, and an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion below the frequency level, and the second portion comprises a second wireless energy receiver configured to receive energy transmitted wirelessly by the internal wireless energy transmitter below the frequency level. 10. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first controller comprising at least one processing unit. 11. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second controller comprising at least one processing unit. 12. The implantable energized medical device according to any one of aspects 10 and 11, wherein: the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device above the frequency level, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion below the frequency level. 13. The implantable energized medical device according to aspect 12, wherein the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion below the frequency level. 14. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises an outer casing made from a polymer material. 15. The implantable energized medical device according to any one of aspects 1 to 13, wherein the first portion comprises an outer casing made from titanium. 16. The implantable energized medical device according to aspect 14 or 15, wherein the outer casing forms a complete enclosure, such that electromagnetic waves received and transmitted by the first portion must travel through the casing. 17. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises an outer casing made from titanium. 18. The implantable energized medical device according to aspect 17, wherein the outer casing forms a complete enclosure, such that electromagnetic waves received and transmitted by the second portion must travel through the casing. ASPECT_903_Electro_Subcutaneous_Control_Pop-Rivet2_VLF-external-internal 1. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured toengage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion is configured to receive and/or transmit electromagnetic waves at a frequency below the frequency level, and wherein the frequency level is 100 kHz, wherein the implantable energized medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 2. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion is configured to receive and/or transmit electromagnetic waves at a frequency below the frequency level, and wherein the frequency level is 100 kHz,wherein the implantable energized medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 3. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion is configured to receive and/or transmit electromagnetic waves at a frequency below the frequency level, and wherein the frequency level is 100 kHz, wherein the implantable energized medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion is configured to receive and/or transmit electromagnetic waves at a frequency below the frequency level, and wherein the frequency level is 100 kHz, wherein the implantable energized medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion is configured to receive and/or transmit electromagnetic waves at a frequency below the frequency level. 6. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion is configured to transmit electromagnetic waves at the frequency below the frequency level to the second portion. 7. The implantable energized medical device according to any of the preceding aspects, wherein the first portion is configured to transmit electromagnetic waves at the frequency below the frequency level to an external device. 8. The implantable energized medical device according to any one of the preceding aspects, wherein the frequency level is 40 kHz or 20 kHz. 9. The implantable energized medical device according to any one of the preceding aspects, wherein the electromagnetic waves comprise wireless energy and/or wireless communication. 10. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first wireless energy receiver for receiving energy transmitted wirelessly by an external wireless energy transmitter below the frequency level, and an internal wireless energy transmitter configured to transmit energy wirelessly to the second portion below the frequency level, and the second portion comprises a second wireless energy receiver configured to receive energy transmitted wirelessly by the internal wireless energy transmitter below the frequency level. 11. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first controller comprising at least one processing unit. 12. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second controller comprising at least one processing unit. 13. The implantable energized medical device according to any one of aspects 11 and 12, wherein: the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device below the frequency level, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion below the frequency level. 14. The implantable energized medical device according to aspect 13, wherein the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion below the frequency level.15. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises an outer casing made from a polymer material. 16. The implantable energized medical device according to any one of aspects 1 to 14, wherein the first portion comprises an outer casing made from titanium.17. The implantable energized medical device according to aspect 15 or 16, wherein the outer casing forms a complete enclosure, such that electromagnetic waves received and transmitted by the first portion must travel through the casing.18. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises an outer casing made from titanium. 19. The implantable energized medical device according to aspect 18, wherein the outer casing forms a complete enclosure, such that electromagnetic waves received and transmitted by the second portion must travel through the casing. ASPECT_904_Electro_Subcutaneous_Control_Pop-Rivet2_Polymer-Titanium 1. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and secondsides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion is made from a polymer material, the second portion comprises a casing made from titanium, wherein the casing forms a complete enclosure, wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 2. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion is made from a polymer material, the second portion comprises a casing made from titanium, wherein the casing forms a complete enclosure, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.3. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other,the third cross-sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion is made from a polymer material, the second portion comprises a casing made from titanium, wherein the casing forms a complete enclosure, wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side,the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured toengage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other,the third cross-sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, the first portion is made from a polymer material, the second portion comprises a casing made from titanium, wherein the casing forms a complete enclosure, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The implantable energized medical device according to aspect 5, wherein the casing of the second portion forms a complete enclosure such that the entirety of the outer surface of the second portion is covered by the casing, when the second portion is connected to the connecting portion. 6. The implantable energized medical device according to aspects 1-4 or 5, wherein the first portion comprises a casing made from the polymer material. 7. The implantable energized medical device according to aspect 6, wherein the casing of the first portion forms a complete enclosure such that the entirety of the outer surface of the first portion is covered by the casing. 8. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion comprises a connection arranged to connect to the first and second portion respectively and carry electrical signals and/or energy. 9. The implantable energized medical device according to aspect 8, wherein the connection is arranged in a core of the connecting portion such that it is encapsulated by outer material of the connecting portion. 10. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion comprises a ceramic material. 11. The implantable energized medical device according to aspect 10, wherein the connection is encapsulated within the ceramic material. 12. The implantable energized medical device according to any one of aspects 8 to 11, wherein the first portion comprises a first connection configured to connect to the connection of the connecting portion. 13. The implantable energized medical device according to any one of aspects 8 to 12, wherein the second portion comprises a second connection configured to connect to the connection of the connection portion. 14. The implantable energized medical device according to any one of the preceding aspects, wherein the casing of the second portion is hermetically sealed. 15. The implantable energized medical device according to aspect 14, wherein the second connection is arranged such that the hermetical seal of the second portion is kept intact.16. The implantable energized medical device according to any one of aspects 6 to 15, wherein the casing of the first portion is hermetically sealed. ASPECT_905_Electro_Subcutaneous_Control_Pop-Rivet2_Uniform_Tapered 1. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, and wherein the connecting portion is configured to extend between the first portion and the second portion along a central extensionaxis, and wherein the second portion is configured to extend in a length direction being divergent with the central extension axis, and wherein the connecting portion has a substantially constant cross-sectional area along the central extension axis, or wherein the connecting portion has a decreasing cross-sectional area in a direction from the first portion towards the second portion along the central extension axis, and/or wherein the second portion has a substantially constant cross-sectional area along the length direction, or whereinthe second portion has a decreasing cross-sectional area in the length direction, wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 2. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area ina first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side,the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, and wherein the connecting portion is configured to extend between the first portion and the second portion along a central extensionaxis, and wherein the second portion is configured to extend in a length direction being divergent with the central extension axis, and wherein the connecting portion has a substantially constant cross-sectional area along the central extension axis, or wherein the connecting portion has a decreasing cross-sectional area in a direction from the first portion towards the second portion along the central extension axis, and/or wherein the second portion has a substantially constant cross-sectional area along the length direction, or wherein the second portion has a decreasing cross-sectional area in the length direction, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 3. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side,the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, and wherein the connecting portion is configured to extend between the first portion and the second portion along a central extensionaxis, and wherein the second portion is configured to extend in a length direction being divergent with the central extension axis, and wherein the connecting portion has a substantially constant cross-sectional area along the central extension axis, or wherein the connecting portion has a decreasing cross-sectional area in a direction from the first portion towards the second portion along the central extension axis, and/or wherein the second portion has a substantially constant cross-sectional area along the length direction, or wherein the second portion has a decreasing cross-sectional area in the length direction, wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. An implantable energized medical device configured to be held in position by a tissue portion of a patient, the medical device comprising: a first portion configured to be placed on a first side of the tissue portion, the first portion having a first cross-sectional area in a first plane and comprising a first surface configured to face a first tissue surface of the first side of the tissue portion, a second portion configured to be placed on a second side of the tissue portion, the second side opposing the first side, the second portion having a second cross-sectional area in a second plane and comprising a second surface configured to engage a second tissue surface of the second side of the tissue portion, and a connecting portion configured to be placed through a hole in the tissue portion extending between the first and second sides of the tissue portion, the connecting portion having a third cross-sectional area in a third plane and a third surface configured to engage the first tissue surface of the first side of the tissue portion, wherein the connecting portion is configured to connect the first portion to the second portion, wherein: the first, second, and third planes are parallel to each other, the third cross-sectional area is smaller than the second cross-sectional area, such that the first portion, second portion and connecting portion are prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes, and wherein the connecting portion is configured to extend between the first portion and the second portion along a central extensionaxis, and wherein the second portion is configured to extend in a length direction being divergent with the central extension axis, and wherein the connecting portion has a substantially constant cross-sectional area along the central extension axis, or wherein the connecting portion has a decreasing cross-sectional area in a direction from the first portion towards the second portion along the central extension axis, and/or wherein the second portion has a substantially constant cross-sectional area along the length direction, or wherein the second portion has a decreasing cross-sectional area in the length direction, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The implantable energized medical device according any of to aspects 1-4, wherein the third cross-sectional area is smaller than the first cross-sectional area. 6. The implantable energized medical device according to aspects 1-4 or 2, wherein the connecting portion is tapered in the direction from the first portion towards the second portion along the central extension axis. 7. The implantable energized medical device according to any of the preceding aspects, wherein the connecting portion has a circular or oval cross-section along the central extension axis with a decreasing diameter in the direction from the first portion towards the second portion. 8. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion is tapered in the length direction.9. The implantable energized medical device according to any of the preceding aspects, wherein the connecting portion has a circular or oval cross-section in the length direction with a decreasing diameter in the length direction. 10. The implantable energized medical device according to any of the preceding aspects, wherein the length direction extends from aninterface between the connecting portion and the second portion towards an end of the second portion. 11. The implantable energized medical device according to any of the preceding aspects, wherein the length direction extends in a direction substantially perpendicular to the central extension axis. 12. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion comprises a protruding element and the first portion comprises a slot, wherein the protruding element is configured to slide within the slot along a predetermined path. 13. The implantable energized medical device according to aspect 12, wherein the protruding element is configured to be interlocked withinthe slot such that the protruding element can only be removed from the slot in a preconfigured position.14. The implantable energized medical device according to aspect 12 or 13, wherein the protruding element is configured to be interlocked within the slot such that the protruding element is permanently enclosed within the slot, or wherein the protruding element is configured to be interlocked within the slot such that the protruding element is permanently enclosed within the slot.15. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion further comprises a fourth cross-sectional area in a fourth plane, wherein the fourth plane is parallel to the first, second and third planes, andwherein the third cross-sectional area is smaller than the fourth cross-sectional area. 16. The implantable energized medical device according to aspect 15, wherein the connecting portion comprises a protruding element comprising the fourth cross-sectional area. 17. The implantable energized medical device according to aspect 15 or 16, wherein the connecting portion comprises a flange comprising the fourth cross-sectional area, such that the flange is prevented from travelling through the hole in the tissue portion in a direction perpendicular to the first, second and third planes. 18. The implantable energized medical device according to aspect 17, wherein the flange protrudes in a direction parallel to the first, second, third and fourth planes, and perpendicular to a central extension of the connecting portion. 19. The implantable energized medical device according to aspect 17 or 18, wherein the flange comprises the third surface configured to engage the first tissue surface of the first side of the tissue portion. 20. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first wireless energy receiver configured to receive energy transmitted wirelessly from an external wireless energy transmitter. 21. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises an internal wireless energy transmitter.22. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second wireless energy receiver. 23. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first energy storage unit.24. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second energy storage unit. 25. The implantable energized medical device according to aspect 23 or 24, wherein at least one of the first and second energy storage unit is a solid-state battery. 26. The implantable energized medical device according to aspect 25, wherein the solid-state battery is a thionyl-chloride battery.27. The implantable energized medical device according to any one of aspects 19 – 26, wherein: the first wireless energy receiver is configured to receive energy transmitted wirelessly by the external wireless energy transmitter, and store the received energy in the first energy storage unit, the internal wireless energy transmitter is configured to wirelessly transmit energy stored in the first energy storage unit to the second wireless energy receiver, and the second wireless energy receiver is configured to receive energy transmitted wirelessly by the internal wireless energy transmitter and store the received energy in the second energy storage unit. 28. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises a first controller comprising at least one processing unit. 29. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a second controller comprising at least one processing unit. 30. The implantable energized medical device according to any one of aspects 28 and 29, wherein at least one of the first and second controller is connected to a wireless transceiver for communicating wirelessly with an external device.31. The implantable energized medical device according to any one of aspects 28 – 30, wherein: the first controller is connected to a first wireless communication receiver in the first portion for receiving wireless communication from an external device, the first controller is connected to a first wireless communication transmitter in the first portion for transmitting wireless communication to a second wireless communication receiver in the second portion.32. The implantable energized medical device according to aspect 31, wherein the second controller is connected to the second wireless communication receiver for receiving wireless communication from the first portion.33. The implantable energized medical device according to any one of aspects 20– 32, wherein the first wireless energy receiver comprises a first coil and the internal wireless energy transmitter comprises a second coil.34. The implantable energized medical device according to any one of aspects 20 – 33, wherein the first portion comprises a combined coil, wherein the combined coil is configured to receive energy wirelessly from an external wireless energy transmitter, and transmit energy wirelessly to the second wireless receiver of the second portion. 35. The implantable energized medical device according to aspect 31 or 34, wherein at least one of the coils are embedded in a ceramic material. 36. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured to enclose at least the first portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. 37. The implantable energized medical device according to aspect 36, wherein the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. 38. The implantable energized medical device according to any one of the preceding aspects, further comprising a housing configured to enclose at least the second portion, and wherein a first portion of the housing is made from titanium and a second portion of the housing is made from a ceramic material. 39. The implantable energized medical device according to aspect 38, wherein the portion of the housing made from a ceramic material comprises at least one coil embedded in the ceramic material. 40. The implantable energized medical device according to any one of the preceding aspects further comprising at least one sensor for providing input to at least one of the first and second controller. 41. The implantable energized medical device according to aspect 40, wherein the sensor is a sensor configured to sense a physical parameter of the implantable energized medical device. 42. The implantable energized medical device according to aspect 41, wherein the sensor is a sensor configured to sense at least one of: a temperature of the implantable energized medical device or of a body engaging portion, a parameter related to the power consumption of the implantable energized medical device or of a body engaging portion, a parameter related to a status of at least one of the first and second energy storage unit, a parameter related to the wireless transfer of energy from a source external to the body of the patient, and a hydraulic pressure.43. The implantable energized medical device according to 40 – 42, wherein the sensor is a sensor configured to sense a physiological parameter of the patient. 44. The implantable energized medical device according to aspect 43, wherein the sensor is a sensor configured to sense at least one of: a parameter related to the patient swallowing, a local temperature, a systemic temperature, blood saturation, blood oxygenation, blood pressure, a parameter related to an ischemia marker, and pH.45. The implantable energized medical device according to aspect 44, wherein the sensor configured to sense a parameter related to the patient swallowing comprises at least one of: a motility sensor, a sonic sensor, an optical sensor, and a strain sensor. 46. The implantable energized medical device according to aspect 45, wherein the sensor configured to sense pH is configured to sense the acidity in the stomach.47. The implantable energized medical device according to any one of aspects 40 – 46, wherein the controller is configured to transmit information based on sensor input to a device external to the body of the patient. 48. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least a portion of an operation device for operating an implantable body engaging portion. 49. The implantable energized medical device according to aspect 48, wherein the second portion comprises at least one electrical motor. 50. The implantable energized medical device according to aspect 49, wherein the second portion comprises a transmission configured to reduce the velocity and increase the force of the movement generated by the electrical motor. 51. The implantable energized medical device according to aspect 50, wherein the transmission is configured to transfer a week force with a high velocity into a stronger force with lower velocity.52. The implantable energized medical device according to aspect 50 or 51, wherein the transmission is configured to transfer a rotatingforce into a linear force.53. The implantable energized medical device according to any one of aspects 50 – 52, wherein the transmission comprises a gear system.54. The implantable energized medical device according to any one of aspects 49 – 53, wherein the second portion comprises a magnetic coupling for transferring mechanical work from the electrical motor through one of: a barrier separating a first chamber of the second portion from a second chamber of the second portion, a housing enclosing at least the second portion. 55. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least one hydraulic pump. 56. The implantable energized medical device according to aspect 55, wherein the hydraulic pump comprises a pump comprising at least one compressible hydraulic reservoir.57. The implantable energized medical device according to any one of aspects 51 – 56, further comprising a capacitor connected to at least one of the first and second energy storage unit and connected to the electrical motor, wherein the capacitor is configured to: be charged by at least one of the first and second energy storage units, and provide the electrical motor with electrical power. 58. The implantable energized medical device according to any one of the preceding aspects, wherein at least one of the first and second portion comprises a sensation generator adapted to generate a sensation detectable by a sense of the patient. 59. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a force transferring element configured to mechanically transfer force from the second portion to an implanted body engaging portion. 60. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a force transferring element configured to hydraulically transfer force from the second portion to an implanted body engaging portion. 61. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises at least one lead for transferring electrical energy and/or information from the second portion to an implanted body engaging portion. 62. The implantable energized medical device according to any one of the preceding aspects, wherein the first portion comprises an injection port for injecting fluid into the first portion. 63. The implantable energized medical device according to any one of the preceding aspects, wherein the connecting portion comprises a conduit for transferring a fluid from the first portion to the second portion. 64. The implantable energized medical device according to aspect 63, wherein the conduit is arranged to extend through the hollow portion of the connecting portion. 65. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a first and a second chamber separated from each other, wherein the first chamber comprises a first liquid and the second chamber comprises a second liquid, and wherein the second liquid is a hydraulic liquid configured to transfer force to an implantable element configured to exert force on the body portion of the patient. 66. The implantable operation device according to aspect 65, wherein a wall portion of the first chamber is resilient to allow an expansion of the first chamber. 67. The implantable energized medical device according to any one of the preceding aspects, wherein the second portion comprises a first hydraulic system in fluid connection with a first hydraulically operable implantable element configured to exert force on the body portion of the patient, and a second hydraulic system in fluid connection with a second hydraulically operable implantable element configured to exert force on the body portion of the patient, wherein the first and second hydraulically operable implantable elements are adjustable independently from each other. 68. The implantable energized medical device according to aspect 67, wherein the first hydraulic system comprises a first hydraulic pump and the second hydraulic systems comprises a second hydraulic pump. 69. The implantable energized medical device according to aspect 67 or 68, wherein each of the first and second hydraulic systems comprises a reservoir for holding hydraulic fluid.70. The implantable energized medical device according to any one of aspects 67 – 69, further comprising a first pressure sensor configured to sense a pressure in the first hydraulic system, and a second pressure sensor configured to sense a pressure in the second hydraulic system. 71. The implantable energized medical device according to any one of the preceding aspects, wherein the first surface is configured to engage the first tissue surface of the first side of the tissue portion. 72. The implantable energized medical device according to any one of the preceding aspects, wherein the first, second and third planes are parallel to a major extension plane of the tissue. 73. The implantable energized medical device according to any one of the preceding aspects, wherein the fourth plane is parallel to a major extension plane of the tissue. 74. The implantable energized medical device according to any one of the preceding aspects, wherein the third cross-sectional area is smaller than the first cross-sectional area. 75. The implantable energized medical device according to any one of the preceding aspects, wherein the third cross-sectional area is equal to or larger than the first cross-sectional area. 76. An implantable device for exerting a force on a body portion of a patient comprising: the implantable energized medical device according to any one of aspects1 – 75, an implantable element configured to exert a force on a body portion of the patient. 77. The implantable device according to aspect 76, wherein the implantable element configured to exert a force on a body portion of the patient is an implantable hydraulic constriction device. 78. The implantable device according to aspect 77, wherein the implantable hydraulic constriction device is configured for constricting a luminary organ of the patient. 79. The implantable device according to aspect 78, wherein the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting an intestine of the patient. 80. The implantable device according to aspect 79, wherein the implantable hydraulic constriction device comprises an implantablehydraulic constriction device for constricting a colon or rectum of the patient. 81. The implantable device according to aspect 79, wherein the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting the intestine at a region of a stoma of the patient. 82. The implantable device according to aspect 78, wherein the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting a blood vessel of the patient. 83. The implantable device according to aspect 81, wherein the implantable hydraulic constriction device for constricting a blood vessel ofthe patient is configured to constrict the venous blood flow leading from an erectile tissue for promoting the engorgement of the erectile tissue. 84. The implantable device according to aspect 78, wherein the implantable hydraulic constriction device comprises an implantable hydraulic constriction device for constricting a vas deference of the patient. 85. The implantable device according to aspect 76, wherein the implantable element configured to exert a force on a body portion of the patient is an implantable element for actively emptying the urinary bladder of the patient. 86. The implantable device according to aspect 85, wherein the implantable element for actively emptying the urinary bladder of the patient is configured to empty the bladder of the patient by compressing the urinary bladder from the outside thereof. 87. The implantable device according to aspect 86, wherein the implantable element configured to exert a force on a body portion of the patient is an implantable element for actively stretching a stomach wall of the patient to create a feeling of satiety.ASPECT 397SE - eHealth_General_Communication_Dual1. A system configured for changing pre-programmed treatment settings of an implantable medical device, when implanted in a patient, by a health care provider, HCP, in the physical presence of the patient, the system comprising: at least one HCP EID external device adapted to receive a command from the HCP, directly or indirectly, to change said pre-programmed treatment settings in steps of an implantable medical device, when implanted, wherein the HCP EID external device is further adapted to beactivated, authenticated, and allowed to perform said command by the HCP providing a HCP private key device comprising a HCP private key, wherein the HCP private key device comprises at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device; wherein the HCP EID external device is adapted to be involved in at least one of: receiving information from the implant, receiving information from a patient EID, receiving information direct or indirect from a remote external device, actuating the implanted medical device, changing pre-programmed settings, and updating software of the implantable medical device, when implanted, wherein the HCP EID external device is adapted to be activated, authenticated, and allowed to perform said command also by the patient, wherein the system further comprises: a patient private key device comprising a patient private key, the patient private key device comprising at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device; wherein the HCP private key and the patient private key are required for performing said actions by the HCP EID external device to at least one of: receive information from the implant, to receive information direct or indirect from a patient remote external device, to actuate the implanted medical device, to change pre-programmed settings, and to update software of the implantable medical device, when the implantable medical device is implanted the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall.2. A system configured for changing pre-programmed treatment settings of an implantable medical device, when implanted in a patient, by a health care provider, HCP, in the physical presence of the patient, the system comprising: at least one HCP EID external device adapted to receive a command from the HCP, directly or indirectly, to change said pre-programmed treatment settings in steps of an implantable medical device, when implanted, wherein the HCP EID external device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing a HCP private key device comprising a HCP private key, wherein the HCP private key device comprises at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device; wherein the HCP EID external device is adapted to be involved in at least one of: receiving information from the implant, receivinginformation from a patient EID, receiving information direct or indirect from a remote external device, actuating the implanted medical device, changing pre-programmed settings, and updating software of the implantable medical device, when implanted, wherein the HCP EID external device is adapted to be activated, authenticated, and allowed to perform said command also by the patient, wherein the system further comprises: a patient private key device comprising a patient private key, the patient private key device comprising at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device; wherein the HCP private key and the patient private key are required for performing said actions by the HCP EID external device to at least one of: receive information from the implant, to receive information direct or indirect from a patient remote external device, to actuate the implanted medical device, to change pre-programmed settings, and to update software of the implantable medical device, when the implantable medical device is implanted wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.3. A system configured for changing pre-programmed treatment settings of an implantable medical device, when implanted in a patient, by a health care provider, HCP, in the physical presence of the patient, the system comprising: at least one HCP EID external device adapted to receive a command from the HCP, directly or indirectly, to change said pre-programmed treatment settings in steps of an implantable medical device, when implanted, wherein the HCP EID external device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing a HCP private key device comprising a HCP private key,wherein the HCP private key device comprises at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device; wherein the HCP EID external device is adapted to be involved in at least one of: receiving information from the implant, receiving information from a patient EID, receiving information direct or indirect from a remote external device, actuating the implanted medical device, changing pre-programmed settings, and updating software of the implantable medical device, when implanted, wherein the HCP EID external device is adapted to be activated, authenticated, and allowed to perform said command also by the patient, wherein the system further comprises: a patient private key device comprising a patient private key, the patient private key device comprising at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device; wherein the HCP private key and the patient private key are required for performing said actions by the HCP EID external device to at least one of: receive information from the implant, to receive information direct or indirect from a patient remote external device, to actuate the implanted medical device, to change pre-programmed settings, and to update software of the implantable medical device, when the implantable medical device is implanted wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.4. A system configured for changing pre-programmed treatment settings of an implantable medical device, when implanted in a patient, by a health care provider, HCP, in the physical presence of the patient, the system comprising: at least one HCP EID external device adapted to receive a command from the HCP, directly or indirectly, to change said pre-programmed treatment settings in steps of an implantable medical device, when implanted, wherein the HCP EID external device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing a HCP private key device comprising a HCP private key, wherein the HCP private key device comprises at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device; wherein the HCP EID external device is adapted to be involved in at least one of: receiving information from the implant, receiving information from a patient EID, receiving information direct or indirect from a remote external device, actuating the implanted medical device, changing pre-programmed settings, and updating software of the implantable medical device, when implanted, wherein the HCP EID external device is adapted to be activated, authenticated, and allowed to perform said command also by the patient, wherein the system further comprises: a patient private key device comprising a patient private key, the patient private key device comprising at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device; wherein the HCP private key and the patient private key are required for performing said actions by the HCP EID external device to at least one of: receive information from the implant, to receive information direct or indirect from a patient remote external device, to actuate the implanted medical device, to change pre-programmed settings, and to update software of the implantable medical device, when the implantable medical device is implanted wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexuallyresponsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The system according to nay one of embodiments 1-4, wherein the HCP EID external device further comprises a wireless transceiver configured for communication with the implanted medical device through a second network protocol. 6. The system according to nay one of embodiments 1-5, wherein the HCP private key device is adapted to be provided to the at least one HCP external device via at least one of; a reading slot or comparable for the HCP private key device, a RFID communication, and a close distance wireless activation communication unit, or electrical direct contact. 7. The system according to anyone of the preceding embodiments, wherein the HCP EID external device comprises at least one of: reading slot or comparable for the HCP private key device, a RFID communication and a close distance wireless activation communication unit, or electrical direct contact.8. The system according to any of the preceding embodiments, wherein the HCP EID external device is adapted to receive a command from a HCP dedicated device to change said pre-programmed treatment steps of the implantable medical device, when implanted, wherein the HCP dedicated device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing their private key.9. The system according to any of the preceding embodiments, wherein at least two of: the HCP EID external device, the patient EID external device, the HCP private key device, and the patient private key device, are configured for wireless communication using a standard network protocol.10. The system according to any of the preceding embodiments, wherein at least two of: the HCP EID external device, the patient EID external device, the HCP private key device, and the patient private key device, are configured for wireless communication using a proprietary network protocol.11. The system according to any of the preceding embodiments, wherein the patient EID external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the patient private key device.12. The system according to any of the preceding embodiments, wherein the patient EID external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the patient private key device.13. The system according to any of the preceding embodiments, wherein at least one of the HCP EID external device, the patient EID external device, the HCP private key device, and the patient private key device comprises a Bluetooth transceiver.14. The system according to any of the preceding embodiments, wherein at least one of the HCP EID external device, the patient EID external device, the HCP private key device, and the patient private key device comprises a UWB transceiver.15. The system according to embodiment 10, wherein the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol.16. The system according to any of the preceding embodiments, wherein the patient EID external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the patient private key device, and wherein the second wireless transceiver has longer effective range than the first wireless transceiver.17. The system according to embodiment 16, wherein the second wireless transceiver has an effective range being one of: 2 times, 4 times, 8 time, 20 times, 50 times or 100 times longer than the effective range of the first wireless transceiver.18. The system according to embodiments 13 or 14, wherein the second wireless transceiver is configured to be disabled to enable wireless communication using the first wireless transceiver.19. The system according to any of the preceding embodiments, wherein the patient EID external device is configured to allow transfer of data between the EID external device and the implantable medical device on the basis of an authentication of the patient EID external device.20. The system according to any of the preceding embodiments, wherein the patient EID external device is a wearable patient external device or a handset.21. The system according to any of the preceding embodiments, wherein the data encrypted by the implantable medical device is related to at least one of: a battery status, a temperature, a time, or an error.22. The system according to any of the preceding embodiments, comprising a master private key device configured to allow issuanceof new private key device, wherein the HCP or HCP admin have such master private key device adapted to be able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. 23. The system according to anyone of the preceding embodiments, wherein the patient remote external device and the patient EID external device are an integrated unit. ASPECT 397B Implant programming_Dual_Local 1. A system for updating software of an implantable medical device, when implanted in a patient, by a health care provider, HCP, the system comprising: a health care provider, HCP, external device, adapted to receive a HCP private key from a HCP private key device, a patient external device adapted to receive a patient private key from a patient private key device; a server, wherein: the HCP external device is adapted to receive a user command to change said pre-programmed treatment settings, the HCP external device being configured to authorize said user command by receiving the HCP private key device and via the patient private key device, and to transmit said user command and authorization to the server, the server is adapted to receive said command from the HCP external device and to relay the received command to the patient external device, and the patient eternal device is adapted to receive the user command and to send said user command to the implanted medical device based on the HCP external device authorizationwherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 2. A system for updating software of an implantable medical device, when implanted in a patient, by a health care provider, HCP, the system comprising: a health care provider, HCP, external device, adapted to receive a HCP private key from a HCP private key device,a patient external device adapted to receive a patient private key from a patient private key device; a server, wherein: the HCP external device is adapted to receive a user command to change said pre-programmed treatment settings, the HCP external device being configured to authorize said user command by receiving the HCP private key device and via the patient private key device, and to transmit said user command and authorization to the server, the server is adapted to receive said command from the HCP external device and to relay the received command to the patient external device, and the patient eternal device is adapted to receive the user command and to send said user command to the implanted medical device based on the HCP external device authorizationwherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 3. A system for updating software of an implantable medical device, when implanted in a patient, by a health care provider, HCP, the system comprising:a health care provider, HCP, external device, adapted to receive a HCP private key from a HCP private key device, a patient external device adapted to receive a patient private key from a patient private key device; a server, wherein: the HCP external device is adapted to receive a user command to change said pre-programmed treatment settings, the HCP external device being configured to authorize said user command by receiving the HCP private key device and via the patient private key device, and to transmit said user command and authorization to the server, the server is adapted to receive said command from the HCP external device and to relay the received command to the patient external device, and the patient eternal device is adapted to receive the user command and to send said user command to the implanted medical device based on the HCP external device authorization wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by thetissue of the stomach wall or the intestine wall. 4. A system for updating software of an implantable medical device, when implanted in a patient, by a health care provider, HCP, the system comprising: a health care provider, HCP, external device, adapted to receive a HCP private key from a HCP private key device, a patient external device adapted to receive a patient private key from a patient private key device; a server, wherein: the HCP external device is adapted to receive a user command to change said pre-programmed treatment settings, the HCP external device being configured to authorize said user command by receiving the HCP private key device and via the patient private key device, and to transmit said user command and authorization to the server,the server is adapted to receive said command from the HCP external device and to relay the received command to the patient external device, and the patient eternal device is adapted to receive the user command and to send said user command to the implanted medical device based on the HCP external device authorization wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 5. The system according to any one of embodiment 1–4, wherein the HCP external device further comprises a wireless transceiver configured for communication with the implanted medical device through a second network protocol. 6. The system according to any one of embodiment 1–5, wherein the HCP external device comprises at least one of: a reading slot or comparable for the HCP private key device, a RFID communication means, and a close distance wireless activation communication unit, or electrical direct contact, for receiving the HCP private key from the HCP private key device or for receiving a patient private key from the patient private key device. 7. The system according to any of the preceding embodiments, wherein the HCP external device is adapted to receive a command from a user to change said software of the implantable medical device. 8. The system according to any of the preceding embodiments, wherein at least two of: the HCP external device, the patient external device, the HCP private key device, and the patient private key device, are configured for wireless communication using a standard network protocol. 9. The system according to any of the preceding embodiments, wherein at least two of: the HCP EID external device, the patient external device, the HCP private key device, and the patient private key device, are configured for wireless communication using a proprietary network protocol. 10. The system according to any of the preceding embodiments, wherein the patient external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the patient private key device. 11. The system according to any of the preceding embodiments, wherein the patient external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the server. 12. The system according to any of the preceding embodiments, wherein at least one of the HCP external device, the patient EID external device, the HCP private key device, and the patient private key device comprises a Bluetooth transceiver. 13. The system according to any of the preceding embodiments, wherein at least one of the HCP external device, the patient external device, the HCP private key device, and the patient private key device comprises a UWB transceiver. 14. The system according to embodiment 9, wherein the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. 15. The system according to any of the preceding embodiments, wherein the patient external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the server, and wherein the second wireless transceiver has longer effective range than the first wireless transceiver. 16. The system according to any of the preceding embodiments, wherein the patient external device is a wearable external device or a handset. 17. The system according to any of the preceding embodiments, wherein the implantable medical implant is adapted to transmit data to thepatient external device, the data being comprising at least one of: a battery status, a temperature, a time, or an error. 18. The system according to anyone of the preceding embodiments, wherein the implantable medical device comprises a measurement device or sensor.19. The system according to any one of the preceding embodiments, wherein the patient EID is adapted to send said command to the medical implant in response to the HCP external device and the patient external device being within a pre-determined distance, or in response to theHCP external device and the patient external device being connected to each other, or in response to receiving the HCP private key.ASPECT 398SE - eHealth_General_Communication_Dual 1. A system configured to change pre-programmed and pre-selected treatment actions of an implantable medical device, when implanted in a patient, by command from the patient, the system comprising: an implantable medical device, a patient remote external device, comprisinga wireless transceiver configured for communication with the implantable medical device, when the medical device is implanted, and a remote display portal configured to receive content delivered from the patient remote external device to expose buttons to express the will to actuate the functions of the implanted medical device by the patient through the patient remote external device, and further configured to present the display portal remotely on a patient display device allowing the patient to actuate the functions of the implanted medical device through the display portal of the patient remote external device visualized on the patient display device wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 2. A system configured to change pre-programmed and pre-selected treatment actions of an implantable medical device, when implanted in a patient, by command from the patient, the system comprising: an implantable medical device, a patient remote external device, comprising a wireless transceiver configured for communication with the implantable medical device, when the medical device is implanted, and a remote display portal configured to receive content delivered from the patient remote external device to expose buttons to express the will to actuate the functions of the implanted medical device by the patient through the patient remote external device, and further configured to present the display portal remotely on a patient display device allowing the patient to actuate the functions of the implanted medical device through the display portal of the patient remote external device visualized on the patient display device wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 3. A system configured to change pre-programmed and pre-selected treatment actions of an implantable medical device, when implanted in a patient, by command from the patient, the system comprising: an implantable medical device, a patient remote external device, comprising a wireless transceiver configured for communication with the implantable medical device, when the medical device is implanted, and a remote display portal configured to receive content delivered from the patient remote external device to expose buttons to express the will to actuate the functions of the implanted medical device by the patient through the patient remote external device, and furtherconfigured to present the display portal remotely on a patient display device allowing the patient to actuate the functions of the implanted medical device through the display portal of the patient remote external device visualized on the patient display device wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. A system configured to change pre-programmed and pre-selected treatment actions of an implantable medical device, when implanted in a patient, by command from the patient, the system comprising: an implantable medical device, a patient remote external device, comprising a wireless transceiver configured for communication with the implantable medical device, when the medical device is implanted, and a remote display portal configured to receive content delivered from the patient remote external device to expose buttons to express the will to actuate the functions of the implanted medical device by the patient through the patient remote external device, and furtherconfigured to present the display portal remotely on a patient display device allowing the patient to actuate the functions of the implanted medical device through the display portal of the patient remote external device visualized on the patient display device wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina.5. The system according to any one of embodiments 1-4, wherein the wireless transceiver, the remote display portal, and the remote display portal are comprised in the patient remote external device. 6. The system according to any one of embodiments 1-5, further comprising the patient display device comprising: a supporting application, a display which hosts the Remote Display Portal, and a patient display device private key. 7. The system according to embodiment 6, wherein the remote display portal is capable of generating a command to be signed by the patient display device private key. 8 The system according to anyone of the preceding embodiments, wherein the patient remote external device is adapted to accept input from the patient via said patient display device through its remote display portal. 9. The system according to any one of the preceding embodiments, wherein the patient remote external device comprises a graphical user interface arranged on a touch-responsive display exposing buttons to express actuation functions of the implanted medical device. 10. The system according to any one of the preceding embodiments, configured to allow the patient to actuate the implant at home through the patient remote external device by means of an authorization granted by a patient private key.11. The system according to embodiment 10, wherein the patient private key comprises at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device.12. The system according to any one of the preceding embodiments, configured to allow the patient to actuate the implantable medical device, when implanted, at home through the patient remote external device, using an authorization granted by the patient private key.13. The system according to anyone of the preceding embodiments, wherein the system further comprises a patient EID external device comprising at least one of: a reading slot or comparable for the patient private key device, a RFID communication, and a close distance wireless activation communication, or electrical direct contact. 14. The system according to any one of the preceding embodiments, wherein the patient EID external device is adapted to be synchronized with the patient remote external device.15. The system according to any one of the preceding embodiments, wherein said patient EID external device further comprises at least one of: a wireless transceiver configured for communication with the patient, a remote external device, and a wired connector for communication with the patient remote external device. 16. The system according to any one of the preceding embodiments, wherein the patient EID external device is adapted to generatean authorization to be signed by the patient private key to be installed into at least one of: the patient remote external device through the patient EID external device, and the implantable medical device. 17. The system according to any one of the preceding embodiment, comprising a patient display device comprising a supporting application capable of displaying the remote display portal with content delivered from the patient remote external device. 18. The system according to embodiment 17, wherein said remote display portal and patient remote external device are adapted to expose buttons to express the will to actuate the functions of the implanted medical device by the patient through the patient remote external device.19. The system according to embodiment 17 or 18, wherein the patient display device comprises at least one of: a display which hosts the remote display portal, and a patient display device private key. 20. The system according to any of embodiments 19-20, wherein said remote display portal is capable of generating a command to be signed by the patient private key.21. The system according to any of the preceding embodiments, comprising a master private key device configured to allow issuanceof new private key device, wherein the HCP or HCP admin have such master private key device adapted to be able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. 22. The system according to anyone of the preceding embodiments, wherein the patient remote external device and the patient EID external device are an integrated unit. 23. The system according to anyone of the preceding embodiments, wherein the HCP dedicated device and the HCP EID external device are an integrated unit. ASPECT 398B eHealth_Pre-programmed steps_Patient remote control 1. A system for changing pre-programmed steps or pre-selected treatment actions of an implantable medical device, when implanted in a patient, the system comprising: an implantable medical device, a patient external device, comprising a wireless transceiver for communication with the implantable medical device, and a patient display device configured to receive a control interface from the patient external device for receiving user input for actuating a function of the implanted medical device and transmitting the user input to the patient remote external device, wherein the patient external device is configured to receive the user input form the patient display device, generate a command for the medical implant based on the user input, cryptographically sign the command and transmit the command to the implantable medical device wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 2. A system for changing pre-programmed steps or pre-selected treatment actions of an implantable medical device, when implanted in a patient, the system comprising: an implantable medical device, a patient external device, comprising a wireless transceiver for communication with the implantable medical device, and a patient display device configured to receive a control interface from the patient external device for receiving user input for actuating afunction of the implanted medical device and transmitting the user input to the patient remote external device, wherein the patient external device is configured to receive the user input form the patient display device, generate a command for the medical implant based on the user input, cryptographically sign the command and transmit the command to the implantable medical device wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 3. A system for changing pre-programmed steps or pre-selected treatment actions of an implantable medical device, when implanted in a patient, the system comprising: an implantable medical device, a patient external device, comprising a wireless transceiver for communication with the implantable medical device, anda patient display device configured to receive a control interface from the patient external device for receiving user input for actuating a function of the implanted medical device and transmitting the user input to the patient remote external device, wherein the patient external device is configured to receive the user input form the patient display device, generate a command for the medical implant based on the user input, cryptographically sign the command and transmit the command to the implantable medical device wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. A system for changing pre-programmed steps or pre-selected treatment actions of an implantable medical device, when implanted in a patient, the system comprising: an implantable medical device, a patient external device, comprising a wireless transceiver for communication with the implantable medical device, and a patient display device configured to receive a control interface from the patient external device for receiving user input for actuating a function of the implanted medical device and transmitting the user input to the patient remote external device, wherein the patient external device is configured to receive the user input form the patient display device, generate a command for the medical implant based on the user input, cryptographically sign the command and transmit the command to the implantable medical device wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The system according to any one of embodiments 1–4, wherein the wireless transceiver and the patient display device are comprised in the patient external device. 6. The system according to any one of embodiments 1–5, wherein the patient display device comprises a patient display device private key. 7. The system according to embodiment 6, wherein the patient display device is configured to generate a command signed by the patient display device private key. 8. The system according to anyone of the preceding embodiments, wherein the patient external device comprises a graphical user interface arranged on a touch-responsive display exposing buttons to invoke functions of the implanted medical device. 9. T The system according to any one of embodiments 1–8, wherein the patient private key comprises at least one of: a smart card, a keyring device, a watch, an arm or wrist band, a necklace.10. The system according to anyone of the preceding embodiments, wherein the patient external device is configured to receive the patient private key for authorizing and in response to receiving the patient private key, transmit a the command to the implantable medical device. 11. The system according to anyone of the preceding embodiments, wherein patient external device comprises at least one of: a reading slot, a RFID communication, and a close distance wireless activation communication, or electrical direct contact, for receiving the patient private key from the patient private key device. 12. The system according to anyone of the preceding embodiments, wherein the patient external device is adapted to generate an authorization for the command to be signed by the patient private key to be installed into at least one of: the patient external device, and the implantable medical device. 13. The system according to anyone of the preceding embodiments, wherein the patient display device comprises a supporting application capable of displaying the a display portal with content delivered from the patient external device. 14. The system according to embodiment 1, wherein said display portal and patient remote external device are adapted to expose buttons to actuate the functions of the implanted medical device by the patient through the patient remote external device. 16. The system according to embodiment 14 or 15, wherein the patient display device comprises a display for displaying the display portal. 17. The system according to any of embodiments 14-16, wherein said display portal is capable of generating a command to be signed by the patient private key. 18. The system according to any of the preceding embodiments, comprising a master private key device configured to allow issuance of new patient private key device, the master private key device adapted to be able to create a new patient private key for a patient private key device.ASPECT 399SE - eHealth_General_implant information1. A system configured for providing information from an implantable medical device, when implanted in a patient, to a distant remote location in relation to the patient, the system comprising: at least one patient EID external device 320’’’adapted to receive information from the implant, adapted to send such information further on to a server or dedicated data infrastructure, DDI, 330, further adapted to be activated and authenticated and allowed to receive said information by the implanted medical device by the patient providing a private key, a patient private key device comprising the private key adapted to be provided to the patient EID external device via at least one of: a reading slot or comparable for the patient private key device, a RFID communication or other close distance wireless activation communication or direct electrical connection, wherein said patient EID external device comprises at least one of; a reading slot or comparable for the patient private key device, an RFID communication, and other close distance wireless activation communication or direct electrical contact; wherein said patient EID external device further comprises at least one wireless transceiver configured for communication with the DDI, through a first network protocol, wherein the implantable medical device comprises a system for treating obesity in a patient, comprising:an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall.2. A system configured for providing information from an implantable medical device, when implanted in a patient, to a distant remote location in relation to the patient, the system comprising: at least one patient EID external device 320’’’adapted to receive information from the implant, adapted to send such information further on to a server or dedicated data infrastructure, DDI, 330, further adapted to be activated and authenticated and allowed to receive said information by the implanted medical device by the patient providing a private key, a patient private key device comprising the private key adapted to be provided to the patient EID external device via at least one of: areading slot or comparable for the patient private key device, a RFID communication or other close distance wireless activation communication or direct electrical connection, wherein said patient EID external device comprises at least one of; a reading slot or comparable for the patient private key device, an RFID communication, and other close distance wireless activation communication or direct electrical contact; wherein said patient EID external device further comprises at least one wireless transceiver configured for communication with the DDI, through a first network protocol, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.3. A system configured for providing information from an implantable medical device, when implanted in a patient, to a distant remote location in relation to the patient, the system comprising: at least one patient EID external device 320’’’adapted to receive information from the implant, adapted to send such information further on to a server or dedicated data infrastructure, DDI, 330, further adapted to be activated and authenticated and allowed to receive said information by the implanted medical device by the patient providing a private key, a patient private key device comprising the private key adapted to be provided to the patient EID external device via at least one of: areading slot or comparable for the patient private key device, a RFID communication or other close distance wireless activation communication or direct electrical connection, wherein said patient EID external device comprises at least one of; a reading slot or comparable for the patient private key device, an RFID communication, and other close distance wireless activation communication or direct electrical contact; wherein said patient EID external device further comprises at least one wireless transceiver configured for communication with the DDI, through a first network protocol, wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.4. A system configured for providing information from an implantable medical device, when implanted in a patient, to a distant remote location in relation to the patient, the system comprising: at least one patient EID external device 320’’’adapted to receive information from the implant, adapted to send such information further on to a server or dedicated data infrastructure, DDI, 330, further adapted to be activated and authenticated and allowed to receive said information by the implanted medical device by the patient providing a private key, a patient private key device comprising the private key adapted to be provided to the patient EID external device via at least one of: a reading slot or comparable for the patient private key device, a RFID communication or other close distance wireless activation communication or direct electrical connection, wherein said patient EID external device comprises at least one of;a reading slot or comparable for the patient private key device, an RFID communication, and other close distance wireless activation communication or direct electrical contact; wherein said patient EID external device further comprises at least one wireless transceiver configured for communication with the DDI, through a first network protocol, wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The system according to any one of embodiments 1–4, wherein the at least one patient EID external device 320’’’is adapted to receive information from the implant, through a second network protocol. 6. The system according to any one of embodiments 1–5, comprising the DDI, wherein the DD1 is adapted to receive information fromsaid patient EID external device, and wherein the DDI comprises a wireless transceiver configured for communication with said patient EID external device. 7. The system according to anyone of the preceding embodiments, wherein the patient EID external device is adapted to receive a command relayed by the DDI, to further send the command to the implanted medical device to change said pre-programmed treatmentsettings of the implanted medical device, and further adapted to be activated and authenticated and allowed to perform said command by the patient providing the patient private key. 8. The system according to anyone of the preceding embodiments, wherein the patient private key device is adapted to provide the patient private key to the patient EID external device by the patient via at least one of; a reading slot or comparable for the patient private key device, an RFID communication or other close distance wireless activation communication, or electrical direct contact. 9. The system according to anyone of the preceding embodiments, said patient EID external device comprising at least one of: a reading slot or comparable for the HCP private key device, a RFID communication, and other close distance wireless activation communication, or direct electrical contact. 10. The system according to anyone of the preceding embodiments, said patient EID external device further comprising at least one wireless transceiver configured for communication with the implanted medical device through a second network protocol. 11. The system according to anyone of the preceding embodiments, comprising the implantable medical device adapted to, when implanted, treat the patient or perform a bodily function. 12. The system according to anyone of the preceding embodiment, wherein the patient private key comprises at least one of: a smart card, a keyring device, a watch, an arm band or wrist band, a necklace, and any shaped device.13. The system according to any of the preceding embodiments, wherein at least two of: the patient EID external device, the IDD, and the patient private key device, are configured for wireless communication using a standard network protocol.14. The system according to any of the preceding embodiments, wherein at least two of: the patient EID external device, the IDD, and the patient private key device, are configured for wireless communication using a proprietary network protocol.15. The system according to any of the preceding embodiments, wherein the patient EID external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the patient private key device.16. The system according to any of the preceding embodiments, wherein the patient EID external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the patient private key device.17. The system according to any of the preceding embodiments, wherein at least one of the patient EID external device, the patient private key device and the IDD comprises a Bluetooth transceiver.18. The system according to any of the preceding embodiments, wherein at least one of the patient EID external device, the patient private key device and the IDD comprises a UWB transceiver.19. The system according to embodiment 13, wherein the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol.20. The system according to any of the preceding embodiments, wherein the patient EID external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the patient private key device, and wherein the second wireless transceiver has longer effective range than the first wireless transceiver.21. The system according to embodiment 20, wherein the second wireless transceiver has an effective range being one of: 2 times, 4 times, 8 time, 20 times, 50 times or 100 times longer than the effective range of the first wireless transceiver.22. The system according to embodiments 20 or 21, wherein the second wireless transceiver is configured to be disabled to enable wireless communication using the first wireless transceiver.23. The system according to any of the preceding embodiments, wherein the patient EID external device is a wearable patient external device or a handset. ASPECT 399B eHealth_Communication_Information from implant_Remote 1. A system for transmitting information from an implantable medical device, when implanted in a patient, the system comprising: an implantable medical device; a patient external device (320’’’) adapted to provide an authorization to the implantable medical device for the patient external device to receive information from the implantable medical device, the authorization being based on the patient external device receiving a patient private key, the patient external device being further configured to send the information to a server (330), a patient private key device comprising the patient private key adapted to be provided to the patient external device wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 2. A system for transmitting information from an implantable medical device, when implanted in a patient, the system comprising: an implantable medical device; a patient external device (320’’’) adapted to provide an authorization to the implantable medical device for the patient external device to receive information from the implantable medical device, the authorization being based on the patient external device receiving a patient private key, the patient external device being further configured to send the information to a server (330), a patient private key device comprising the patient private key adapted to be provided to the patient external device wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 3. A system for transmitting information from an implantable medical device, when implanted in a patient, the system comprising: an implantable medical device; a patient external device (320’’’) adapted to provide an authorization to the implantable medical device for the patient external device to receive information from the implantable medical device, the authorization being based on the patient external device receiving a patientprivate key, the patient external device being further configured to send the information to a server (330), a patient private key device comprising the patient private key adapted to be provided to the patient external device wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. A system for transmitting information from an implantable medical device, when implanted in a patient, the system comprising: an implantable medical device; a patient external device (320’’’) adapted to provide an authorization to the implantable medical device for the patient external device to receive information from the implantable medical device, the authorization being based on the patient external device receiving a patient private key, the patient external device being further configured to send the information to a server (330),a patient private key device comprising the patient private key adapted to be provided to the patient external device wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The system according to any one of embodiments 1–4, wherein the patient external device comprises at least one of: a reading slot, a RFID communication or other close distance wireless communication, or direct electrical connection, for receiving the patient private key device.6. The system according to any one of embodiments 1–5, wherein the authorization is valid for a predetermined period of time, or wherein the authorization is provided at the time of sending the information. 7. The system according to any one of the preceding embodiments, wherein the authorization is provided during charging of the patient external device. 8. The system according to any one of the preceding embodiments, wherein the authorization is provided using a magnetic field, near-field magnetic induction, an electrical field, ultrasound or light, and wherein the implantable medical device comprises a receiver for a magnetic field, an electrical field, ultrasound or light. 9. The system according to any one of the preceding embodiments, wherein the patient external device 320’’’ is adapted to encrypt the information before sending the information to the server. 10. The system according to any one of the preceding embodiments, wherein the implantable medical device is configured to encrypt the data before sending it to the patient external device.11. The system according to any one of the preceding embodiments, wherein the patient external device is adapted to transmit information to the server using a first network protocol and receive information from the implant using a second network protocol. 12. The system according to anyone of the preceding embodiments, comprising the implantable medical device, the implantable medical device being adapted to treat the patient or perform a bodily function. 13. The system according to anyone of the preceding embodiment, wherein the patient private key device comprises at least one of: a smart card, a keyring device, a watch, an arm band or wrist band, a necklace. 14. The system according to any of the preceding embodiments, wherein at least two of: the patient external device, the server, and the patient private key device, are configured for wireless communication using a standard network protocol. 15. The system according to any of the preceding embodiments, wherein at least two of: the patient external device, the server, and the patient private key device, are configured for wireless communication using a proprietary network protocol.16. The system according to any of the preceding embodiments, wherein the patient external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the patient private key device or the server. 17. The system according to any of the preceding embodiments, wherein the patient external device is configured to use a first frequencyband for communication with the implantable medical device and use a second frequency band for communication with the patient private key device or the server.18. The system according to any of the preceding embodiments, wherein at least one of the patient external device, the patient private key device and the server comprises a Bluetooth transceiver. 19. The system according to any of the preceding embodiments, wherein at least one of the patient external device, the patient private key device and the server comprises a UWB transceiver.20. The system according to embodiment 6, wherein the standard network protocol is one from the list of: Radio Frequency type protocol,RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. 21. The system according to any of the preceding embodiments, wherein the patient external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the patient private key device or the server, and wherein the second wireless transceiver has longer effective range than the first wireless transceiver. 22. The system according to embodiment 13, wherein the second wireless transceiver has an effective range being one of: 2 times, 4 times, 8 times, 20 times, 50 times or 100 times longer than the effective range of the first wireless transceiver. 23. The system according to embodiments 17 or 18, wherein the second wireless transceiver is configured to be disabled to enable wireless communication using the first wireless transceiver. 24. The system according to any of the preceding embodiments, wherein the patient external device is a wearable patient external device or a handset.25. The system according to any of the preceding embodiments, wherein the data encrypted by the implantable medical device is related to at least one of: a battery status, a temperature, a time, or an error.26. The system according to any of the preceding embodiments, comprising a master private key device configured to issue of a new private key device and configured to replace and pair a new patient private key device or HCP private key device into the system, through the HCP external device.27. The system according to anyone of the preceding embodiments, comprising a measurement device or sensor adapted to deliver a measurement to at least one of the server, patent external device and a patient display device.ASPECT 400SE - eHealth_General_system, DDI inactivation of remote or private key1. A system comprising, an implantable medical device adapted to, when implanted in a patient, to communicate with an external device, the external device comprising at least one of a patient remote external device or a patient EID external device, the system further comprising: the patient EID external device adapted to communicate with and send commands to the implantable medical device when implanted, to change pre-programmed settings, a patient private key device comprising a patient private key, adapted to activate and authenticate and allow to perform said command by the patient EID external device, wherein said private key is adapted to be provided to the external device via at least one of: a reading slot orcomparable for the HCP private key device, an RFID communication or other close distance wireless activation communication, or direct electrical contact, and a data infrastructure server, DDI, adapted to send commands to the patient EID external device for further transport to the implanted medical device, to inactivate the authority and authenticating function of the patient private key wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall2. A system comprising, an implantable medical device adapted to, when implanted in a patient, to communicate with an external device, the external device comprising at least one of a patient remote external device or a patient EID external device, the system further comprising: the patient EID external device adapted to communicate with and send commands to the implantable medical device when implanted, to change pre-programmed settings, a patient private key device comprising a patient private key, adapted to activate and authenticate and allow to perform said command by the patient EID external device, wherein said private key is adapted to be provided to the external device via at least one of: a reading slot or comparable for the HCP private key device, an RFID communication or other close distance wireless activation communication, or direct electrical contact, and a data infrastructure server, DDI, adapted to send commands to the patient EID external device for further transport to the implanted medical device, to inactivate the authority and authenticating function of the patient private key wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal3. A system comprising, an implantable medical device adapted to, when implanted in a patient, to communicate with an external device, the external device comprising at least one of a patient remote external device or a patient EID external device, the system further comprising: the patient EID external device adapted to communicate with and send commands to the implantable medical device when implanted, to change pre-programmed settings,a patient private key device comprising a patient private key, adapted to activate and authenticate and allow to perform said command by the patient EID external device, wherein said private key is adapted to be provided to the external device via at least one of: a reading slot or comparable for the HCP private key device, an RFID communication or other close distance wireless activation communication, or direct electrical contact, and a data infrastructure server, DDI, adapted to send commands to the patient EID external device for further transport to the implanted medical device, to inactivate the authority and authenticating function of the patient private key wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.4. A system comprising, an implantable medical device adapted to, when implanted in a patient, to communicate with an external device, the external device comprising at least one of a patient remote external device or a patient EID external device, the system further comprising: the patient EID external device adapted to communicate with and send commands to the implantable medical device when implanted, to change pre-programmed settings, a patient private key device comprising a patient private key, adapted to activate and authenticate and allow to perform said command by the patient EID external device, wherein said private key is adapted to be provided to the external device via at least one of: a reading slot or comparable for the HCP private key device, an RFID communication or other close distance wireless activation communication, or direct electrical contact, and a data infrastructure server, DDI, adapted to send commands to the patient EID external device for further transport to the implanted medical device, to inactivate the authority and authenticating function of the patient private key. 5. The system according to any one of the embodiments 1–4, wherein the at least one patient remote external device comprises a patient remote external device private key, wherein the DDI via the patient EID external device is able to inactivate the authority and authenticating function of the patient remote external device, thereby inactivating the patient remote external device. 6. The system according to any one of the embodiments 1–4, wherein said patient EID external device comprises at least one wireless transceiver configured for communication with the DD1 via a first network protocol.7. The system according to anyone of the preceding embodiments, comprising the DDI, wherein the DDI is adapted to receive command from a HCP EID external device, and to send the received command to the patient EID external device, wherein the DDI comprises a wireless transceiver configured for communication with said patient external device. 8. The system according to anyone of the preceding embodiments, wherein the patient EID external device is adapted to receive thecommand from the DDI, wherein the command originates from a health care provider, HCP, and wherein the patient EID is adapted to inactivate the patient private key and to send the command to the implanted medical device.9. The system according to anyone of the preceding embodiments, wherein the patient EID external device is adapted to receive the command from the DDI, wherein the command originates from a health care provider, HCP, wherein the patient EID external device is adapted to receive the command from the HCP via the DDI to inactivate the patient remote external device comprising a patient remote external device private key, and wherein the patient EID external device is further adapted to send this command to the implanted medical device. 10. The system according to anyone of the preceding embodiments, wherein the patient EID external device further comprises at least one wireless transceiver configured for communication with the implanted medical device through a second network protocol. 11. The system according to embodiment any preceding embodiment, wherein at least one of the patient private key and a patient remote external device private key comprises a hardware key. 12. The system according to any preceding embodiment, wherein the private key device is at least one of, a smartcard, a key-ring device, a watch an arm or wrist band a neckless or any shaped device.13. The system according to any preceding embodiment, wherein at least two of: the patient remote external device, the patient EID external device, the patient private key device, and the DDI,are configured for wireless communication using a standard network protocol. 10. The system according to any preceding embodiment, wherein at least two of: the patient remote external device, the patient EID external device, the patient private key device, and the DDI, are configured for wireless communication using a proprietary network protocol.14. The system according to any of the preceding embodiments, wherein the patient EID external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the patient private key device.15. The system according to any of the preceding embodiments, wherein the patient EID external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the patient private key device.16. The system according to any of the preceding embodiments, wherein at least one of the patient remote external device, the patient EID external device, the patient private key device, and the DDI, comprise a Bluetooth transceiver.17. The system according to any of the preceding embodiments, wherein at least one of the patient remote external device, the patient EID external device, the patient private key device, and the DDI, comprise an UWB transceiver.18. The system according to embodiment 9, wherein the standard network protocol is one from the list of: Radio Frequency typeprotocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol.19. The system according to any of the preceding embodiments, patient EID external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with thepatient private key device, and wherein the second wireless transceiver has longer effective range than the first wireless transceiver.20. The system according to embodiment 16, wherein the second wireless transceiver has an effective range being one of: 2 times, 4 times, 8 time, 20 times, 50 times or 100 times longer than the effective range of the first wireless transceiver.21. The system according to embodiments 19 or 20, wherein the second wireless transceiver is configured to be disabled to enable wireless communication using the first wireless transceiver.22. The system according to any of the preceding embodiments, wherein the patient EID external device is a wearable patient external device or a handset.23. The system according to any of the preceding embodiments, wherein the data encrypted by the implantable medical device is related to at least one of: a battery status, a temperature, a time, or an error. ASPECT 400B eHealth_Communication_Inactivation of key 1. A system comprising: an implantable medical device; an external device adapted to communicate with the implantable medical device, a private key device comprising a private key, wherein said private key is adapted to be provided to the external device via at least one of: a reading slot, an RFID communication or other close distance wireless activation communication, or direct electrical contact, and a data infrastructure server, DDI, adapted to send commands to the external device for relaying to the implanted medical device, to inactivate the authority and authenticating function of the patient private key wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall . 2. A system comprising: an implantable medical device; an external device adapted to communicate with the implantable medical device, a private key device comprising a private key, wherein said private key is adapted to be provided to the external device via at least one of: a reading slot, an RFID communication or other close distance wireless activation communication, or direct electrical contact, and a data infrastructure server, DDI, adapted to send commands to the external device for relaying to the implanted medical device, to inactivate the authority and authenticating function of the patient private key wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal 3. A system comprising: an implantable medical device; an external device adapted to communicate with the implantable medical device, a private key device comprising a private key, wherein said private key is adapted to be provided to the external device via at least one of: a reading slot, an RFID communication or other close distance wireless activation communication, or direct electrical contact, and a data infrastructure server, DDI, adapted to send commands to the external device for relaying to the implanted medical device, to inactivate the authority and authenticating function of the patient private key wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. A system comprising: an implantable medical device; an external device adapted to communicate with the implantable medical device, a private key device comprising a private key, wherein said private key is adapted to be provided to the external device via at least one of: a reading slot, an RFID communication or other close distance wireless activation communication, or direct electrical contact, and a data infrastructure server, DDI, adapted to send commands to the external device for relaying to the implanted medical device, to inactivate the authority and authenticating function of the patient private key wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina.5. The system according to any one of embodiments 1–4, wherein the system further comprises a second patient external device, whereinthe DDI via the patient external device is able to inactivate the authority and authenticating function of the second patient external device, thereby inactivating the second patient remote external device. 6. The system according to any one of embodiments 1–5, wherein said external device comprises at least one wireless transceiver configured for communication with the DDI via a first network protocol. 7. The system according to anyone of the preceding embodiments, wherein the DDI is adapted to receive command from a health care provider, HCP, external device, and to send the received command to the patient external device. 8. The system according to anyone of the preceding embodiments, wherein the external device further comprises at least one wireless transceiver configured for communication with the implanted medical device through a second network protocol. 9. The system according to embodiment any preceding embodiment, wherein the patient private key device comprises a hardware key. 10. The system according to any preceding embodiment, wherein the private key device is at least one of: a smartcard, a key-ring device, a watch an arm or wrist band a neckless or any shaped device. 11. The system according to any preceding embodiment, wherein at least two of: the external device, the HCP external device, the patient private key device, and the DDI, are configured for wireless communication using a standard network protocol. 12. The system according to any preceding embodiment, wherein at least two of: the external device, the HCP external device, the patient private key device, and the DDI, are configured for wireless communication using a proprietary network protocol. 13. The system according to any of the preceding embodiments, wherein the external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the patient private key device. 14. The system according to any of the preceding embodiments, wherein the external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the patient private key device.15. The system according to any of the preceding embodiments, wherein at least one of the patient remote external device, the external device, the patient private key device, and the DDI, comprise a Bluetooth transceiver. 16. The system according to any of the preceding embodiments, wherein at least one of the external device, the HCP external device, the patient private key device, and the DDI, comprise an UWB transceiver or an NFMI transceiver. 17. The system according to embodiment 7, wherein the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, NFMI type protocol and GSM type protocol. 17. The system according to any of the preceding embodiments, external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the patient private key device or the DDI, and wherein the second wireless transceiver has longer effective range than the first wireless transceiver. 18. The system according to embodiment 15, wherein the second wireless transceiver has an effective range being one of: 2 times, 4 times, 8 time, 20 times, 50 times or 100 times longer than the effective range of the first wireless transceiver. 20. The system according to embodiments 15 or 16, wherein the second wireless transceiver is configured to be disabled to enable wireless communication using the first wireless transceiver. 21. The system according to any of the preceding embodiments, wherein the external device is a wearable patient external device or a handset. 22. The system according to any of the preceding embodiments, comprising a master private key device configured to allow issuance of new private key device, and adapted to be able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device.ASPECT 401SE - eHealth_General_patient_at hospital 1. A system configured for changing pre-programmed treatment settings in steps of an implantable medical device, when implanted in a patient, by a health care provider, HCP, either in the physical presence of the patient or remotely with the patient on distance, the system comprising: at least one HCP EID external device adapted to receive a command directly or indirectly from the HCP to change said pre-programmed treatment settings in steps of the implantable medical device, when implanted, wherein the HCP EID external device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing: a HCP private key device comprising a HCP private key, comprising at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device; wherein the system further comprises: a patient private key device comprising a patient private key, comprising at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device; wherein both the HCP and patient private key is required for performing said action by the HCP EID external device to change the pre- programmed settings in the implant and to update software of the implantable medical device, when the implantable medical device is implanted, andwherein the patient private key is adapted to activate, be authenticated, and allowed to perform said command provided by the HCP, either via the HCP EID external device or when the action is performed remotely via a patient EID external device wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall 2. A system configured for changing pre-programmed treatment settings in steps of an implantable medical device, when implanted in a patient, by a health care provider, HCP, either in the physical presence of the patient or remotely with the patient on distance, the system comprising: at least one HCP EID external device adapted to receive a command directly or indirectly from the HCP to change said pre-programmed treatment settings in steps of the implantable medical device, when implanted, wherein the HCP EID external device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing:a HCP private key device comprising a HCP private key, comprising at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device; wherein the system further comprises: a patient private key device comprising a patient private key, comprising at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device; wherein both the HCP and patient private key is required for performing said action by the HCP EID external device to change the pre- programmed settings in the implant and to update software of the implantable medical device, when the implantable medical device is implanted, andwherein the patient private key is adapted to activate, be authenticated, and allowed to perform said command provided by the HCP, either via the HCP EID external device or when the action is performed remotely via a patient EID external device wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal 3. A system configured for changing pre-programmed treatment settings in steps of an implantable medical device, when implanted in a patient, by a health care provider, HCP, either in the physical presence of the patient or remotely with the patient on distance, the system comprising: at least one HCP EID external device adapted to receive a command directly or indirectly from the HCP to change said pre-programmed treatment settings in steps of the implantable medical device, when implanted, wherein the HCP EID external device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing: a HCP private key device comprising a HCP private key, comprising at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device; wherein the system further comprises: a patient private key device comprising a patient private key, comprising at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device; wherein both the HCP and patient private key is required for performing said action by the HCP EID external device to change the pre-programmed settings in the implant and to update software of the implantable medical device, when the implantable medical device is implanted, andwherein the patient private key is adapted to activate, be authenticated, and allowed to perform said command provided by the HCP, either via the HCP EID external device or when the action is performed remotely via a patient EID external device wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit 4. A system configured for changing pre-programmed treatment settings in steps of an implantable medical device, when implanted in a patient, by a health care provider, HCP, either in the physical presence of the patient or remotely with the patient on distance, the system comprising: at least one HCP EID external device adapted to receive a command directly or indirectly from the HCP to change said pre-programmedtreatment settings in steps of the implantable medical device, when implanted, wherein the HCP EID external device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing:a HCP private key device comprising a HCP private key, comprising at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device; wherein the system further comprises:a patient private key device comprising a patient private key, comprising at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device;wherein both the HCP and patient private key is required for performing said action by the HCP EID external device to change the pre- programmed settings in the implant and to update software of the implantable medical device, when the implantable medical device is implanted, and wherein the patient private key is adapted to activate, be authenticated, and allowed to perform said command provided by the HCP, either via the HCP EID external device or when the action is performed remotely via a patient EID external devicewherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the regionof sexually responsive tissue in the vulva or the wall or the vagina 5. The system according to anyone of the preceding embodiments, comprising a master private key device that allow issuance of new private key device wherein the HCP or HCP admin have such master private key device adapted to be able to replace and pair a new patient private key device or HCP private key device into the system, through the HCP EID external device. 6. The system according to anyone of the preceding embodiments, wherein the patient remote external device and the patient EID external device are an integrated unit. 7. The system according to anyone of the preceding embodiments, wherein the HCP dedicated device and the HCP EID external device are an integrated unit. 8. The system according to anyone of the preceding embodiments, further comprising a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and a patient display device. 9. The system according to anyone of the preceding embodiments, further comprising a food sensor adapted to measure at least if the patient swallows solid food or is drinking fluid, wherein said food sensor is configured to be connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake.10. The system according to any preceding embodiment, wherein the HCP EID external device further comprises a wireless transceiver configured for communication with the implanted medical device through a second network protocol. 11. The system according to embodiment any preceding embodiment, wherein the HCP private key device is adapted to be provided to the at least one HCP external device via at least one of; a reading slot or comparable for the HCP private key device, a RFID communication, and a close distance wireless activation communication unit, or electrical direct contact. 12. The system according to anyone of the preceding embodiments, wherein the HCP EID external device comprises at least one of: reading slot or comparable for the HCP private key device, a RFID communication, and a close distance wireless activation communication unit, or electrical direct contact. 13. The system according to any of the preceding embodiments, wherein the HCP EID external device is adapted to receive a command from an HCP dedicated device to change said pre-programmed treatment steps of the implantable medical device, when implanted, wherein the HCP dedicated device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing their private key.14. The system according to any of the preceding embodiments, wherein the HCP EID external device and the HCP private key deviceare configured for wireless communication using a standard network protocol.15. The system according to any of the preceding embodiments, wherein the HCP EID external device and the HCP private key device are configured for wireless communication using a proprietary network protocol.16. The system according to any of the preceding embodiments, wherein the HCP EID external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the HCP private key device.ASPECT 402SE - eHealth_General_EID and DDI 1. A system configured for changing pre-programmed treatment settings in steps of an implantable medical device, when implanted in a patient, by a health care provider, HCP, with the patient on remote on distance, the system comprising: at least one HCP EID external device adapted to receive a command from the HCP direct or indirect, to change said pre-programmedtreatment settings in steps of an implantable medical device, when implanted, wherein the HCP EID external device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP; wherein said action by the HCP EID external device to change pre-programmed settings in the implant and to update software of theimplantable medical device, when the implantable medical device is implanted, is adapted to be authenticated by a HCP private key device and a patient private key devicewherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomachand/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall 2. A system configured for changing pre-programmed treatment settings in steps of an implantable medical device, when implanted in a patient, by a health care provider, HCP, with the patient on remote on distance, the system comprising: at least one HCP EID external device adapted to receive a command from the HCP direct or indirect, to change said pre-programmed treatment settings in steps of an implantable medical device, when implanted, wherein the HCP EID external device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP; wherein said action by the HCP EID external device to change pre-programmed settings in the implant and to update software of theimplantable medical device, when the implantable medical device is implanted, is adapted to be authenticated by a HCP private key device and a patient private key device wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 3. A system configured for changing pre-programmed treatment settings in steps of an implantable medical device, when implanted in a patient, by a health care provider, HCP, with the patient on remote on distance, the system comprising: at least one HCP EID external device adapted to receive a command from the HCP direct or indirect, to change said pre-programmed treatment settings in steps of an implantable medical device, when implanted, wherein the HCP EID external device is further adapted to beactivated, authenticated, and allowed to perform said command by the HCP; wherein said action by the HCP EID external device to change pre-programmed settings in the implant and to update software of the implantable medical device, when the implantable medical device is implanted, is adapted to be authenticated by a HCP private key device and a patient private key device wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. A system configured for changing pre-programmed treatment settings in steps of an implantable medical device, when implanted in a patient, by a health care provider, HCP, with the patient on remote on distance, the system comprising: at least one HCP EID external device adapted to receive a command from the HCP direct or indirect, to change said pre-programmed treatment settings in steps of an implantable medical device, when implanted, wherein the HCP EID external device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP; wherein said action by the HCP EID external device to change pre-programmed settings in the implant and to update software of the implantable medical device, when the implantable medical device is implanted, is adapted to be authenticated by a HCP private key device and a patient private key device wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina.5 The system according to any one of embodiments 1-4, comprising the HCP private key device comprising a HCP private key, comprising at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device.6. The system according to any one of embodiments 1-5, comprising: the patient private key device comprising a patient private key, comprising at least one of: a smart card, a keyring device, a watch, a arm or wrist band, a necklace, and any shaped device. 6. The system according to anyone of the preceding embodiments, wherein the patient private key is adapted to activate, be authenticated, and allowed to perform said command provided by the HCP, either via the HCP EID external device or when the action is performed remotely via a patient EID external device. 7. The system according to anyone of the preceding embodiments, further comprising a dedicated data infrastructure, DDI, the patient EID external device, and the HCP EID external device, wherein the communication between the patient EID external device and theHCP EID external device is performed via the DDI. 8. The system according to anyone of the preceding embodiments, comprising a master private key device that allows issuance of new private key device wherein the HCP or HCP admin have such master private key device adapted to be able to replace and pair a new patient private key device or HCP private key device into the system. 9. The system according to anyone of the preceding embodiments, wherein the patient remote external device and the patient EID external device are an integrated unit.10. The system according to anyone of the preceding embodiments, wherein the HCP dedicated device and the HCP EID external device are an integrated unit.11. The system according to anyone of the preceding embodiments, further comprising a measurement device or sensor adapted to deliver a measurement to at least one of the DDI, patent EID external device and patient display device.12. The system according to anyone of the preceding embodiments, comprising a food sensor, adapted to measure at least if the patient swallow solid food or is drinking fluid, wherein said food sensor is connected to the control unit of a medical device to cause an action to stretch the stomach after a determined amount of food intake.13. The system according to any preceding embodiment, wherein the HCP EID external device further comprises a wireless transceiver configured for communication with the implanted medical device through a second network protocol.14. The system according to embodiment any preceding embodiment, wherein the HCP private key device is adapted to be provided to the at least one HCP external device via at least one of: a reading slot or comparable for the HCP private key device, a RFID communication, anda close distance wireless activation communication unit, or electrical direct contact. 15. The system according to anyone of the preceding embodiments, wherein the HCP EID external device comprises at least one of: reading slot or comparable for the HCP private key device, a RFID communication, and a close distance wireless activation communication unit, or electrical direct contact. 16. The system according to any of the preceding embodiments, wherein the HCP EID external device is adapted to receive a command from an HCP dedicated device to change said pre-programmed treatment steps of the implantable medical device, when implanted, wherein the HCP dedicated device is further adapted to be activated, authenticated, and allowed to perform said command by the HCP providing their private key.17. The system according to any of the preceding embodiments, wherein the HCP EID external device and the HCP private key device are configured for wireless communication using a standard network protocol.18. The system according to any of the preceding embodiments, wherein the HCP EID external device and the HCP private key device are configured for wireless communication using a proprietary network protocol.19. The system according to any of the preceding embodiments, wherein the HCP EID external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the HCP private key device.ASPECT 396SE - eHealth_General_Communication_Dual1. A system configured for changing pre-programmed treatment settings of an implantable medical device, when implanted in a patient, from a distant remote location in relation to the patient, the system comprising: at least one health care provider, HCP, EID external device, and a HCP private key device, wherein the HCP EID external device is adapted to receive a command from the HCP to change said pre-programmed treatment settings of an implanted medical device, and further adapted to be activated and authenticated and allowed to perform said command by the HCP providing the HCP private key device, wherein the HCP private key device is adapted to be provided to the HCP EID external device via at least one of: a reading slot or comparable for the HCP private key device, and a RFID communication or other close distance wireless activation communication; wherein said HCP EID external device comprises at least one of: a reading slot or comparable for the HCP private key device, a RFID communication, and other close distance wireless activation communication or electrical direct contact; wherein said HCP EID external device further comprises at least one wireless transceiver configured for communication with a data infrastructure server, DDI, through a first network protocol, wherein said system further comprises: a data infrastructure server, DDI, adapted to receive command from said HCP EID external device and to relay the received command without modifying said command to a patient EID external device, wherein the DDI comprises one wireless transceiver configured for communication with said patient external device, and a patient EID external device adapted to receive the command from the HCP EID relayed by the DDI, further adapted to send this command to the implanted medical device, said command adapted to change said pre-programmed treatment settings of the implanted medical device, and further adapted to be activated and authenticated and allowed to perform said command by the implant, wherein the implanted medical device is configured to treat the patient or perform a bodily function wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall . 2. A system configured for changing pre-programmed treatment settings of an implantable medical device, when implanted in a patient, from a distant remote location in relation to the patient, the system comprising: at least one health care provider, HCP, EID external device, and a HCP private key device, wherein the HCP EID external device is adapted to receive a command from the HCP to change said pre-programmed treatment settings of an implanted medical device, and further adapted to be activated and authenticated and allowed to perform said command by the HCPproviding the HCP private key device, wherein the HCP private key device is adapted to be provided to the HCP EID external device via at least one of: a reading slot or comparable for the HCP private key device, and a RFID communication or other close distance wireless activation communication; wherein said HCP EID external device comprises at least one of: a reading slot or comparable for the HCP private key device, a RFID communication, and other close distance wireless activation communication or electrical direct contact; wherein said HCP EID external device further comprises at least one wireless transceiver configured for communication with a data infrastructure server, DDI, through a first network protocol, wherein said system further comprises: a data infrastructure server, DDI, adapted to receive command from said HCP EID external device and to relay the received command without modifying said command to a patient EID external device, wherein the DDI comprises one wireless transceiver configured for communication with said patient external device, anda patient EID external device adapted to receive the command from the HCP EID relayed by the DDI, further adapted to send this command to the implanted medical device, said command adapted to change said pre-programmed treatment settings of the implanted medical device, and further adapted to be activated and authenticated and allowed to perform said command by the implant, wherein the implanted medical device is configured to treat the patient or perform a bodily function,wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.3. A system configured for changing pre-programmed treatment settings of an implantable medical device, when implanted in a patient, from a distant remote location in relation to the patient, the system comprising: at least one health care provider, HCP, EID external device, and a HCP private key device, wherein the HCP EID external device is adapted to receive a command from the HCP to change said pre-programmed treatment settings ofan implanted medical device, and further adapted to be activated and authenticated and allowed to perform said command by the HCP providing the HCP private key device, wherein the HCP private key device is adapted to be provided to the HCP EID external device via at least one of: a reading slot or comparable for the HCP private key device, and a RFID communication or other close distance wireless activation communication; wherein said HCP EID external device comprises at least one of: a reading slot or comparable for the HCP private key device, a RFID communication, and other close distance wireless activation communication or electrical direct contact; wherein said HCP EID external device further comprises at least one wireless transceiver configured for communication with a data infrastructure server, DDI, through a first network protocol, wherein said system further comprises: a data infrastructure server, DDI, adapted to receive command from said HCP EID external device and to relay the received command without modifying said command to a patient EID external device, wherein the DDI comprises one wireless transceiver configured for communication with said patient external device, and a patient EID external device adapted to receive the command from the HCP EID relayed by the DDI, further adapted to send this command to the implanted medical device, said command adapted to change said pre-programmed treatment settings of the implanted medical device, and further adapted to be activated and authenticated and allowed to perform said command by the implant, wherein the implanted medical device is configured to treat the patient or perform a bodily function wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.4. A system configured for changing pre-programmed treatment settings of an implantable medical device, when implanted in a patient, from a distant remote location in relation to the patient, the system comprising: at least one health care provider, HCP, EID external device, and a HCP private key device, wherein the HCP EID external device is adapted to receive a command from the HCP to change said pre-programmed treatment settings ofan implanted medical device, and further adapted to be activated and authenticated and allowed to perform said command by the HCP providing the HCP private key device, wherein the HCP private key device is adapted to be provided to the HCP EID external device via at least one of: a reading slot or comparable for the HCP private key device, and a RFID communication or other close distance wireless activation communication; wherein said HCP EID external device comprises at least one of: a reading slot or comparable for the HCP private key device, a RFID communication, and other close distance wireless activation communication or electrical direct contact; wherein said HCP EID external device further comprises at least one wireless transceiver configured for communication with a data infrastructure server, DDI, through a first network protocol, wherein said system further comprises: a data infrastructure server, DDI, adapted to receive command from said HCP EID external device and to relay the received command without modifying said command to a patient EID external device, wherein the DDI comprises one wireless transceiver configured for communication with said patient external device, anda patient EID external device adapted to receive the command from the HCP EID relayed by the DDI, further adapted to send this command to the implanted medical device, said command adapted to change said pre-programmed treatment settings of the implanted medical device, and further adapted to be activated and authenticated and allowed to perform said command by the implant, wherein the implanted medical device is configured to treat the patient or perform a bodily function wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The system configured for changing pre-programmed treatment settings of an implantable medical device according to any one of embodiments 1–4, wherein the patient providing a patient private key device adapted to be provided to the patient EID external device by the patient via at least one of: a reading slot or comparable for the patient private key device, a RFID communication or other close distance wireless activation communication or electrical direct contact, wherein said patient EID external device comprises at least one of: a reading slot or comparable for the HCP private key device, a RFID communication, and other close distance wireless activation communication or electrical direct contact. 6. The system configured for changing pre-programmed treatment settings of an implantable medical device according to any one of embodiments 1–5, wherein the wherein said patient EID external device further comprises at least one wireless transceiver configured for communication with the implanted medical device through a second network protocol. 7. The system configured for changing pre-programmed treatment settings of an implantable medical device according to any one of embodiments 1–6, wherein at least one of the patient private key device or HCP private key device comprises a hardware key. 8. The system according to any preceding embodiment, wherein the private key device is at least one of, a smartcard, a key-ring device, a watch an arm or wrist band a neckless or any shaped device.9. The system according to any of the preceding embodiments, wherein at least two of: the HCP EID external device, the patient EID external device, the HCP private key device, the patient private key device, and the DDI is configured for wireless communication using a standard network protocol.10. The system according to any of the preceding embodiments, wherein at least two of: the HCP EID external device, the patient EID external device, the HCP private key device, the patient private key device, and the DDI is configured for wireless communication using a proprietary network protocol.11. The system according to any of the preceding embodiments, wherein the patient EID external device is configured to use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the DDI.12. The system according to any of the preceding embodiments, wherein the patient EID external device is configured to use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the DDI.13. The system according to any of the preceding embodiments, wherein the DDI is configured to use a first frequency band forcommunication with the patient EID external device and a second frequency band for communication with the patient private key device.14. The system according to any of the preceding embodiments, wherein at least one of the HCP EID external device, the patient EID external device, the HCP private key device, the patient private key device and the DDI comprises a Bluetooth transceiver.15. The system according to any of the preceding embodiments, wherein at least one of the HCP EID external device, the patient EID external device, the HCP private key device, the patient private key device and the DDI comprises a UWB transceiver.16. The system according to embodiment 7, wherein the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol.17. The system according to any of the preceding embodiments, wherein the patient EID external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the DDI, and wherein the second wireless transceiver has longer effective range than the first wireless transceiver.18. The system according to any of the preceding embodiments, wherein the patient private key device comprises a first wireless transceiver for wireless communication with the HCP EID external device, and a second wireless transceiver for wireless communication with the DDI, and wherein the second wireless transceiver has longer effective range than the first wireless transceiver.19. The system according to embodiments 15 or 16, wherein the second wireless transceiver has an effective range being one of: 2 times, 4 times, 8 time, 20 times, 50 times or 100 times longer than the effective range of the first wireless transceiver.20. The system according to any of embodiments 15-17, wherein the second wireless transceiver is configured to be disabled to enable wireless communication using the first wireless transceiver.21. The system according to any of the preceding embodiments, wherein the patient EID external device is configured to allowtransfer of data between the EID external device and the implantable medical device on the basis of an authentication of the patient EID external device.22. The system according to any of the preceding embodiments, wherein the patient EID external device is a wearable patient external device or a handset.23. The system according to any of the preceding embodiments, wherein the data encrypted by the implantable medical device is related to at least one of: a battery status, a temperature, a time, or an error. ASPECT 454 Dual remote controls 1. A communication system for transmission of data to or from an implantable medical device, the communication system comprising: an implantable medical implant; a first remote control comprising a first wireless communication unit configured for wireless transmission of data to or from the implantable medical device, the first remote control being operable by a user; and a second remote control comprising a second wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a third communication unit for communicating with a patient display device, the second remote control being inoperable by a user,wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 2. A communication system for transmission of data to or from an implantable medical device, the communication system comprising: an implantable medical implant; a first remote control comprising a first wireless communication unit configured for wireless transmission of data to or from the implantable medical device, the first remote control being operable by a user; and a second remote control comprising a second wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a third communication unit for communicating with a patient display device, the second remote control being inoperable by a user, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 3. A communication system for transmission of data to or from an implantable medical device, the communication system comprising: an implantable medical implant; a first remote control comprising a first wireless communication unit configured for wireless transmission of data to or from the implantable medical device, the first remote control being operable by a user; and a second remote control comprising a second wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a third communication unit for communicating with a patient display device, the second remote control being inoperable by a user, wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. A communication system for transmission of data to or from an implantable medical device, the communication system comprising: an implantable medical device; a first remote control comprising a first wireless communication unit configured for wireless transmission of data to or from the implantable medical device, the first remote control being operable by a user; and a second remote control comprising a second wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a third communication unit for communicating with a patient display device, the second remote control being inoperable by a user, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The communication system according to any one of the preceding embodiments, wherein the first remote control comprises an input device for receiving a first user input, and wherein the first remote control is configured to transmit the first user input to the implantable medical device. 6. The communication system according to any one of the preceding embodiments, wherein the second remote control is configured to receive second user input from the patient display device and to transmit the second user input to the implantable medical implant. 7. The communication system according to any one of the preceding embodiments, wherein the data comprises a control command for the medical implant. 8. The communication system according to any one of the preceding embodiments, wherein at least one of the first wireless communication unit and the second wireless communication unit is configured to send or receive data using near-field magnetic induction. 9. The communication system according to embodiment 5, wherein at least one of the first wireless communication unit and the second wireless communication unit comprises a transmitter coil for modulating a magnetic field for transmitting the data, and wherein the implantable medical device comprises a receiving coil and an NFMI receiver connected to the receiving coil to receive the data.10. The communication system according to embodiment 6, wherein the transmitter coil is configured to modulate a magnetic field, and the NFMI receiver is adapted to measure the magnetic field in the receiving coil. 11. The communication system according to any one of the preceding embodiments, wherein at least one of the first wireless communication unit and the second wireless communication unit is configured to wirelessly charge the medical device using near-field magnetic induction.12. The communication system according to embodiment 11, wherein the medical device comprises a coil for receiving wireless energy for charging the device via near-field magnetic induction. 13. The communication system according to any one of the preceding embodiments, wherein the second and third communication units are configured to transmit and/or receive data using different network protocols. 14. The communication system according to any one of the preceding embodiments, wherein the second and third communication units are configured to transmit and/or receive data using different frequency bands. 15. The communication system according to any one of the preceding embodiments, wherein at least one of the first remote control, the second remote control and the implantable medical device comprises a Bluetooth transceiver. 16. The communication system according to any one of the preceding embodiments, wherein at least one of first remote control, the second remote control and the implantable medical device comprises a UWB transceiver.17. The communication system according to embodiment 16, wherein the network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. 18. The communication system according to any one of the preceding embodiments, wherein the second communication unit has a longer effective range than the third communication unit. 19. The communication system according to any one of the preceding embodiments, wherein the second remote control is configured to communicate with a consumer electronics device. 20. The communication system according to embodiment 16, wherein the patient display device comprises the consumer electronics device. 21. The communication system according to any one of the preceding embodiments, wherein the first remote control is configured to control functions of the implantable medical device based on user input to the first remote control. ASPECT 457 Controlling energy transfer Accumulated / PID 1. A method for wireless energy transfer from an external energy source located outside the patient to an internal energy receiver located inside the patient, the internal energy receiver being connected to an implantable medical device for supplying received energy thereto, the method comprising: determining an accumulated amount of received energy over a time period; determining a current change in the received energy; determining a control signal reflecting the accumulated received energy and the change in the transferred or received energy; controlling the energy transfer based on the control signal wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 2. A method for wireless energy transfer from an external energy source located outside the patient to an internal energy receiver located inside the patient, the internal energy receiver being connected to an implantable medical device for supplying received energy thereto, the method comprising: determining an accumulated amount of received energy over a time period; determining a current change in the received energy; determining a control signal reflecting the accumulated received energy and the change in the transferred or received energy; controlling the energy transfer based on the control signal, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 3. A method for wireless energy transfer from an external energy source located outside the patient to an internal energy receiver located inside the patient, the internal energy receiver being connected to an implantable medical device for supplying received energy thereto, the method comprising: determining an accumulated amount of received energy over a time period; determining a current change in the received energy; determining a control signal reflecting the accumulated received energy and the change in the transferred or received energy; controlling the energy transfer based on the control signal, wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. A method for wireless energy transfer from an external energy source located outside the patient to an internal energy receiver located inside the patient, the internal energy receiver being connected to an implantable medical device for supplying received energy thereto, the method comprising: determining an accumulated amount of received energy over a time period; determining a current change in the received energy; determining a control signal reflecting the accumulated received energy and the change in the transferred or received energy; controlling the energy transfer based on the control signal, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The method according to any one of the preceding embodiments, wherein determining an accumulated amount of received energy is determined by the internal energy receiver. 6. The method according to any one of the preceding embodiments, wherein determining a current change is performed by the internal energy receiver. 7. The method according to any one of the preceding embodiments, wherein the internal energy received comprises a PID regulator for controlling the energy transfer.8. The method according to embodiment 4, wherein the PID regulator is implemented in a microcontroller. 9. The method according to any one of the preceding embodiments, wherein determining a control signal is performed by the internal energy receiver. 10. The method according to embodiment 6, wherein the control signal is transmitted to the external energy source, and wherein the external energy source is configured to adjust the transmitted energy based on the control signal. 11. The method according to any one of the preceding embodiments, wherein controlling the energy transfer is controlled by the internal energy receiver.12. The method according to any one of the preceding embodiments, wherein controlling the energy transfer is performed by the external energy source.13. The method according to any one of the preceding embodiments, wherein controlling the energy transfer comprises adjusting the energy transfer efficiency.14. The method according any one of the preceding embodiments, wherein the external device comprises a transmitter coil for modulating amagnetic field for transmitting data or transmitting energy, and wherein the implantable medical device comprises a receiving coil and an NFMI receiver connected to the receiving coil to receive the data or the energy.15. The method according to any one of the preceding embodiments, wherein at least one of the first wireless communication unit and the second wireless communication unit is configured to wirelessly charge the medical device using near-field magnetic induction. 16. The method according to embodiment 9, wherein the medical device comprises a coil for receiving wireless energy for charging the device via near-field magnetic induction. 17. The method according to any one of the preceding embodiments, further comprising: receiving energy in pulses according to a pulse pattern, and measuring the received pulse pattern. 18. The method according to embodiment 15, further comprising: determining that the pulse pattern deviates from a predefined pulse pattern, and controlling the energy transfer based on the determination. 19.The method according to any one of the preceding embodiments, further comprising: measuring a temperature in the implantable medical device or in the body of the patient, and controlling the energy transfer in response to the measured temperature. 20. The method according to any one of the preceding embodiments, wherein the implantable medical device comprises at least one coil connected to a variable impedance, the method further comprising controlling the energy transfer by controlling the variable impedance. 21. The method according to any one of the preceding embodiments, wherein the implantable medical device comprises at least one coil having a plurality of windings, wherein the plurality of windings each are connected to a respective variable impedance, the method further comprising controlling the energy transfer by controlling the respective variable impedance individually. ASPECT 453 Voice control 1. A method of teaching a voice-controlled implantable medical device to recognize a voice command, the method comprising: inputting a first audio training phrase to the medical implant, when the medical device is implanted in the body of the patient, creating a transfer function, the transfer function being based on the first audio training phrase, wherein the transfer function is configuredto adjust the amplitude of at least one frequency of audio received at the medical device for enhancing audio received at the medical device to facilitate detection of voice commands, inputting a second audio training phrase to the medical implant, the second audio training phrase comprising the voice command, the voice command comprising an instruction for the control of the medical device, using the transfer function for generating an enhanced second audio training phrase in the medical implant, and associating the enhanced second audio training phrase with the instruction for the control of the medical device,wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 2. A method of teaching a voice-controlled medical device to recognize a voice command, the method comprising: inputting a first audio training phrase to the medical implant, when the medical device is implanted in the body of the patient, creating a transfer function, the transfer function being based on the first audio training phrase, wherein the transfer function is configuredto adjust the amplitude of at least one frequency of audio received at the medical device for enhancing audio received at the medical device to facilitate detection of voice commands,inputting a second audio training phrase to the medical implant, the second audio training phrase comprising the voice command, the voice command comprising an instruction for the control of the medical device, using the transfer function for generating an enhanced second audio training phrase in the medical implant, and associating the enhanced second audio training phrase with the instruction for the control of the medical device, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 3. A method of teaching a voice-controlled medical device to recognize a voice command, the method comprising: inputting a first audio training phrase to the medical implant, when the medical device is implanted in the body of the patient, creating a transfer function, the transfer function being based on the first audio training phrase, wherein the transfer function is configured to adjust the amplitude of at least one frequency of audio received at the medical device for enhancing audio received at the medical device to facilitate detection of voice commands, inputting a second audio training phrase to the medical implant, the second audio training phrase comprising the voice command, the voice command comprising an instruction for the control of the medical device, using the transfer function for generating an enhanced second audio training phrase in the medical implant, and associating the enhanced second audio training phrase with the instruction for the control of the medical device, wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. A method of teaching a voice-controlled medical device to recognize a voice command, the method comprising: inputting a first audio training phrase to the medical implant, when the medical device is implanted in the body of the patient, creating a transfer function, the transfer function being based on the first audio training phrase, wherein the transfer function is configuredto adjust the amplitude of at least one frequency of audio received at the medical device for enhancing audio received at the medical device to facilitate detection of voice commands,inputting a second audio training phrase to the medical implant, the second audio training phrase comprising the voice command, the voice command comprising an instruction for the control of the medical device, using the transfer function for generating an enhanced second audio training phrase in the medical implant, and associating the enhanced second audio training phrase with the instruction for the control of the medical device, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The method according to any one of the embodiments, wherein adjusting the amplitude comprises at least one of: filtering, cancelling and amplifying the at least one frequency. 6. The method according to any one of the preceding embodiments, wherein at least one of the first and second audio training phrase is a spoken audio training phrase. 7. The method according to embodiment 6, wherein the spoken audio training phrase is spoken by the patient the device is implanted in. 8. The method according to any one of the preceding embodiments, wherein the first audio training phrase comprises the at least one voice command related to an instruction for the control of the medical implant. 9. The method according to any one of the preceding embodiments, wherein the first and second audio training phrases is the same voice command. 10. The method according to any one of the preceding embodiments, wherein the first and second audio training phrases are different. 11. The method according to any one of the preceding embodiments, wherein creating the transfer function comprises amplifying frequencies muffled by the location of the medical device in the body of the patient. 12. The method according to any one of the preceding embodiments, wherein creating the transfer function comprises filtering or cancelling noise generated by the body. 13. The method according to any one of the preceding embodiments, wherein the medical device is configured to receive voice commands related to an instruction for control of the medical implant. 14. The method according to any one of the preceding embodiments, wherein the voice command relates to at least one of:• performing a function of the medical device;• using a sensor to measure a parameter relating to a condition of the patient or a condition of the medial implant;• sending or receiving data from the medical implant. ASPECT Large coil1. A system for wirelessly charging an implantable medical implant, when implanted in a body of a patient, the system comprising: an internal energy receiver comprising a secondary coil, the internal energy receiver being connected to the implantable medical implant; an external energy transmitter comprising a primary coil for wirelessly transmitting energy to the internal energy receiver via the secondary coil; wherein a diameter of the primary coil is larger than a diameter of the secondary coil, wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall.2. A system for wirelessly charging an implantable medical implant, when implanted in a body of a patient, the system comprising: an internal energy receiver comprising a secondary coil, the internal energy receiver being connected to the implantable medical implant; an external energy transmitter comprising a primary coil for wirelessly transmitting energy to the internal energy receiver via the secondary coil;wherein a diameter of the primary coil is larger than a diameter of the secondary coil, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.3. A system for wirelessly charging an implantable medical implant, when implanted in a body of a patient, the system comprising: an internal energy receiver comprising a secondary coil, the internal energy receiver being connected to the implantable medical implant; an external energy transmitter comprising a primary coil for wirelessly transmitting energy to the internal energy receiver via the secondary coil; wherein a diameter of the primary coil is larger than a diameter of the secondary coil, wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.4. A system for wirelessly charging an implantable medical implant, when implanted in a body of a patient, the system comprising: an internal energy receiver comprising a secondary coil, the internal energy receiver being connected to the implantable medical implant; an external energy transmitter comprising a primary coil for wirelessly transmitting energy to the internal energy receiver via the secondary coil; wherein a diameter of the primary coil is larger than a diameter of the secondary coil, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. .5. The system according to any one of the preceding embodiments, wherein the system further comprises: an internal controller connected to the internal energy receiver, for controlling the amount of energy received by the internal energy receiver.6. The system according to any one of the preceding embodiments, wherein the internal energy receiver further comprises a measurement unit for measuring a parameter related to the implantable medical device or the body of the patient..7. The system according to any one of the preceding embodiments, wherein the controller is configured to measure the accumulated energy received by the internal energy receiver over a period of time and to measure a current change in energy received, and to control the energy received based on the accumulated energy and the current change.8. The system according to any one of the preceding embodiments, wherein the controlled comprises a Proportional – Integral – Derivative, PID, regulator for controlling the received energy.9. The system according to any one of the preceding embodiments, wherein the internal energy received comprises a variable impedance.10. The system according to embodiment 9, when depending on any one of embodiments 5-9, wherein the internal energy receiver is configured to control the resonant frequency by controlling the variable impedance.11. The system according to embodiment 10, wherein the controller is configured to vary the variable impedance in response to a measured parameter deviating from a predetermined interval or exceeding a threshold value.12. The system according to embodiment 10, wherein the parameter relates to the energy received by the coil over a time period.13. The system according to embodiment 11 or 12, wherein the measurement unit is configured to measure a parameter related to a change in energy received by the coil.14. The system according to embodiment 6-13, wherein the receiving unit is configured to receive transferred energy in pulses according to a pulse pattern, and wherein the measurement unit is configured to measure a parameter related to the pulse pattern.15. The system according to embodiment 6-13, wherein the receiving unit is configured to receive transferred energy in pulses according to a pulse pattern, and wherein the measurement unit is configured to measure a parameter related to the pulse pattern.16. The system according to embodiment 6-13, wherein the controller is configured to control the variable impedance in response to the pulse pattern deviating from a predefined pulse pattern.17. The system according to embodiment 9-16, wherein: the variable impedance comprises a resistor and a capacitor, the variable impedance comprises a resistor and an inductor, the variable impedance comprises an inductor and a capacitor, the variable impedance comprises a digitally tuned capacitor, the variable impedance comprises a digital potentiometer, or the variable impedance comprises a variable inductor.18. The system according any one of the preceding embodiments, wherein the diameter of the primary coil is more than 0.5 cm.19. The system according to embodiment 18, wherein the diameter of the primary coil is more than 10 cm.20. The system according to embodiment 19, wherein the diameter of the primary coil is more than 15 cm.21. The system according to embodiment 20, wherein the diameter of the primary coil is more than 20 cm.22. The system according to embodiment 21, wherein the diameter of the primary coil is more than 30 cm.23. The system according to embodiment 22, wherein the diameter of the primary coil is more than 50 cm.24. The system according to any one of embodiments 1-17, wherein the area of the primary coil is more than 0.5 cm2.25. The system according to embodiment 24, wherein the area of the primary coil is more than 2 cm2.26. The system according to embodiment 25, wherein the area of the primary coil is more than 10 cm2.27. The system according to embodiment 26, wherein the area of the primary coil is more than 100 cm2.28. The system according to embodiment 27, wherein the area of the primary coil is more than 300 cm2.29. The system according to embodiment 28, wherein the area of the primary coil is more than 500 cm2.30. The system according to embodiment 29, wherein the area of the primary coil is more than 800 cm2. ASPECT 456 NFMI communication and energy transfer 1. A system for communication with an implantable medical device, when implanted in a body of a patient, comprising: an internal communications unit, connected to or comprised in the implantable medical device; an external communications unit, wherein the internal communications unit and the external communications unit are configured to communicate using near field magnetic induction, wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomachand/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. . 2. A system for communication with an implantable medical device, when implanted in a body of a patient, comprising: an internal communications unit, connected to or comprised in the implantable medical device; an external communications unit, wherein the internal communications unit and the external communications unit are configured to communicate using near field magnetic induction, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 3. A system for communication with an implantable medical device, when implanted in a body of a patient, comprising: an internal communications unit, connected to or comprised in the implantable medical device; an external communications unit, wherein the internal communications unit and the external communications unit are configured to communicate using near field magnetic induction, wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. A system for communication with an implantable medical device, when implanted in a body of a patient, comprising: an internal communications unit, connected to or comprised in the implantable medical device; an external communications unit, wherein the internal communications unit and the external communications unit are configured to communicate using near field magnetic induction, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The system according to any one of embodiments -4, wherein: the internal communication unit comprises an internal NFMI receiver and an internal coil connected to the internal NFMI receiver, the internal NFMI receiver being configured to measure an induced voltage in the internal coil, the external communications unit comprises an external NFMI transmitter and an external coil connected to the external NFMI transmitter, and the external coil and the external NFMI transmitter are configured to modulate a magnetic field for sending data to the implantable medical device 603 via the internal coil. 6. The system according to embodiment 5, wherein the external NFMI transmitter further comprises a capacitor for tuning the external coil and the external NFMI transmitter. 7.The system according to embodiment 6, wherein the internal NFMI receiver comprises a tunable resistor and capacitor tank for turning the internal coil and the internal NFMI receiver. 8. The system according to any one of the preceding embodiments, wherein: the internal communication unit comprises an internal NFMI transmitter and an internal coil connected to the internal NFMI transmitter, the external communications unit comprises an external NFMI receiver and an external coil connected to the external NFMI receiver, the external NFMI receiver being configured to measure an induced voltage in the external coil, the internal coil and the internal NFMI transmitter are configured to modulate a magnetic field for sending data to the external communications unit via the external coil. 9. The system according to embodiment 8, wherein the internal NFMI transmitter further comprises a capacitor for tuning the internal coil and the internal NFMI receiver. 10. The system according to embodiment 8 or 9, wherein the external NFMI receiver comprises a tunable resistor and capacitor tank for turning the external NFMI receiver and the external coil. 11. The system according to any one of the preceding embodiments, wherein the implantable medical device comprises an active portion configured to monitor, treat or perform a function of a body of a patient.12. The system according to embodiment 11, wherein the active portion is not a pacemaker, hearing aid or a neurostimulation implant.13. The system according to any one of the preceding embodiments, wherein the internal communications unit is adapted to be implanted at a tissue depth of at least 8 cm or at least 15cm. 14. The system according to any one of the preceding embodiments, wherein the internal communications unit is adapted to be implanted in an abdomen of a patient. 15. The system according to any one of the preceding embodiments, wherein the external communications unit is configured to communicate with another external device. 16. The system according to any one of the preceding embodiments, wherein the internal communications unit is configured to encrypt data before transmitting it to the external communications unit. 17. The system according to embodiment 16, wherein the external communications unit is configured to relay the encrypted data to the another external device without decrypting it. ASPECT 459 Resonant circuit 1. An implantable medical device adapted to receive transcutaneously and wirelessly transmitted energy, the implantable medical device comprising: an energy consuming part, a first energy receiving unit, comprising a first coil configured for receiving transcutaneously transferred energy, and a first impedance unit electrically connected to the first coil, the receiving unit being configured to transfer the received energy to the energy consuming part a second energy receiving unit, comprising a second coil configured for receiving transcutaneously transferred energy and a secondimpedance unit electrically connected to the second coil, the receiving unit being configured to transfer the received energy to the energy consuming part, a measurement unit configured to measure a parameter related to energy transfer, and a controller configured to control the subcutaneously received energy based on the parameter by controlling the first or the second impedance unit, wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 1. An implantable medical device adapted to receive transcutaneously and wirelessly transmitted energy, the implantable medical device comprising: an energy consuming part, a first energy receiving unit, comprising a first coil configured for receiving transcutaneously transferred energy, and a first impedance unit electrically connected to the first coil, the receiving unit being configured to transfer the received energy to the energy consuming part a second energy receiving unit, comprising a second coil configured for receiving transcutaneously transferred energy and a second impedance unit electrically connected to the second coil, the receiving unit being configured to transfer the received energy to the energy consuming part, a measurement unit configured to measure a parameter related to energy transfer, and a controller configured to control the subcutaneously received energy based on the parameter by controlling the first or the second impedance unit, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 1. An implantable medical device adapted to receive transcutaneously and wirelessly transmitted energy, the implantable medical device comprising: an energy consuming part, a first energy receiving unit, comprising a first coil configured for receiving transcutaneously transferred energy, and a first impedance unit electrically connected to the first coil, the receiving unit being configured to transfer the received energy to the energy consuming part a second energy receiving unit, comprising a second coil configured for receiving transcutaneously transferred energy and a secondimpedance unit electrically connected to the second coil, the receiving unit being configured to transfer the received energy to the energy consuming part, a measurement unit configured to measure a parameter related to energy transfer, and a controller configured to control the subcutaneously received energy based on the parameter by controlling the first or the second impedance unit,wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 1. An implantable medical device adapted to receive transcutaneously and wirelessly transmitted energy, the implantable medical device comprising: an energy consuming part, a first energy receiving unit, comprising a first coil configured for receiving transcutaneously transferred energy, and a first impedanceunit electrically connected to the first coil, the receiving unit being configured to transfer the received energy to the energy consuming part a second energy receiving unit, comprising a second coil configured for receiving transcutaneously transferred energy and a secondimpedance unit electrically connected to the second coil, the receiving unit being configured to transfer the received energy to the energy consuming part, a measurement unit configured to measure a parameter related to energy transfer, anda controller configured to control the subcutaneously received energy based on the parameter by controlling the first or the second impedance unit, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The implantable medical device according to any one of the preceding embodiments, wherein the first energy receiving unit has a first resonant frequency based on the inductance of the first coil and the impedance of the first impedance unit, and the second energy receiving unit has a second resonant frequency based on the inductance of the second coil and the impedance of second impedance unit. 6. The implantable medical device according to embodiment 5, wherein the first receiving unit has a resonant frequency different from the resonant frequency of the second receiving unit. 7. The implantable medical device according to any preceding embodiment, wherein the first and second impedance units are connected in parallel to the respective coil.Todo ASPECT 447A - Data_packet_encryption-Implant 1. A implantable medical device configured to receive remote instructions from an external system, the implantable medical device comprising: a wireless receiver configured to receive wirelessly transmitted data packets from the external system, a computing unit configured to: verify the electronic signature, and use a checksum provided in the data packet to verify the integrity of the instructions. 2. The implantable medical device according to embodiment 1, wherein the computing unit is configured to decrypt the data packet. 3. The implantable medical device according to any one of embodiments 1 and 2, wherein the computing unit is configured to use the checksum to verify that the bit stream making up the instructions is unchanged. 4. The implantable medical device according to any one of embodiments 1 and 2, wherein the wireless receiver is part of a wireless transceiver.5. The implantable medical device according to any one of embodiments 1 – 4, wherein the computing unit comprises a memory unitconfigured to store electronic signatures, and wherein the computing unit is configured to verify the electronic signature my comparing the electronic signature with the electronic signatures stored in the memory unit. 6. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises a control program configured to control at least one function of the implantable medical device, and wherein computing unit is configured to alter the control program on the basis of the received instructions. 7. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises an internal computing unit configured to run a control program for controlling a function of the implantable medical device, wherein the control program comprises at least one adjustable parameter affecting the control of the implantable medical device, and wherein the method of providing remote instructions comprises providing instructions for altering the at least one parameter for affecting the control of the implantable medical device. 8. The implantable medical device according to embodiment 7, wherein the computing unit comprises a memory unit configured to store parameter values, and wherein the method further comprises the step of verifying that the instructions for altering the at least one parameter will result in the at least one parameter being updated to a parameter value comprised in the set of stored parameter values. 9. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises a central unit, comprising at least one of a wireless receiver and a wireless transceiver, and a security module connected to the central unit, wherein the implantable medical device is configured to transfer the data packet from the central unit to the security module and wherein the security module is configured to performing at least a portion of at least one of the decryption and the signature verification. 10. The implantable medical device according to embodiment 9, wherein the security module comprises a set of rules for accepting communication from the central unit, and wherein the security module is configured to verify compliance with the set of rules. 11. The implantable medical device according to embodiment 10, wherein wireless receiver or wireless transceiver is configured to be placedin an off-mode, in which no wireless communication can be received by the wireless transceiver, and wherein the set of rules comprises a rule stipulating that communication from the central unit is only accepted at the security module when the wireless transceiver is placed in the off-mode. 12. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device is configured to at least one of decrypting the data packet and verifying the electronic signature using a private key of the implantable medical device.13. The implantable medical device according to any one of embodiments 10 – 12, wherein the private key is a non-extractable key.14. The implantable medical device according to any one of embodiments 10 – 13, wherein the implantable medical device is configured to perform a proof of possession operation comprising: transmitting, from the implantable medical device to the external system, a query based on a public key associated with the private key of the external system, receiving, at the implantable medical device, a response based on the possession of the private key in the external system, and verifying that the response based on the possession of the private key matches the query based on a public key. 15. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device is configured to communicate with the external system independently of time. 16. The implantable medical device according to any one of the preceding embodiments, wherein the private key is provided in the implantable medical device by the manufacturer of the implantable medical device. 17. The implantable medical device according to embodiment 16, wherein the private key is stored as hardware or software in the implantable medical device.18. The implantable medical device according to any one of the preceding embodiments 12 – 17, wherein the implantable medical device is configured to: verify a first electronic signature made using at least one of a first key and a second key, and verifying a second electronic signature made using at least one of a first key and a second key.19. The implantable medical device according to embodiment 18, wherein at least one of the first and second keys is a private key. 20. The implantable medical device according to embodiment 18, wherein the first and second keys are different. 21. The implantable medical device according to embodiment 20, wherein the first and second keys comprises at least one common element.22. The implantable medical device according to any one of embodiments 18 – 21, wherein the implantable medical device is configured to: verify a first electronic signature to allow communication from the external system to the implantable medical device, andverify a second electronic signature to allow an instruction received in the communication to alter the control program running on the implantable medical device. 23. The implantable medical device according to embodiment 22, wherein the first electronic signature is an electronic signature linked to the user of the implantable medical device and the second electronic signature is an electronic signature linked to a healthcare provider.24. The implantable medical device according to any one of embodiments 12 – 23, wherein only a portion of the private key is needed to at least one of: decrypt the data packet and verify the electronic signature.25. The implantable medical device according to any one of embodiments 12 – 23, wherein the implantable medical device trusts any external device holding the private key. 26. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device is configured to receive the data packet comprising: at least one instruction signed by a private key of the external system, and a public key including information about which root have created the public key. 27. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device is configured to accept communication from an external system based on at least one password being provided to the implantable medical device. 28. The implantable medical device according to embodiment 27, wherein the implantable medical device is configured to accept communication from an external system based on two passwords being provided to the implantable medical device. 29. The implantable medical device according to embodiment 28, wherein the implantable medical device is configured to accept communication from an external system based on one patient password and one healthcare provider passwords being provided to the implantable medical device.Todo ASPECT 331B – eHealth General Security Module 1. An implantable controller for an implantable medical device, the implantable controller comprises: a wireless transceiver for communicating wirelessly with an external device, a security module, and a central unit configured to be in communication with the wireless transceiver and the security module. wherein: the wireless transceiver is configured to receive data from the external device including at least one instruction to the implantable medical device, and transmit the received communication to the central unit, the central unit is configured to send the data to the security module, derived from the received communication from the external device, and the security module is configured to: decrypt at least a portion of the data or verify the authenticity of the data, and communicate the at least one instruction to the implantable medical device based on a successful decryption or verification of the secure communication. 2. The implantable controller according to embodiment 1, wherein the security module comprises a set of rules for accepting communication from the central unit. 3. The implantable controller according to embodiment 2, wherein the wireless transceiver is configured to be placed in an off-mode, in which no wireless communication can be transmitted or received by the wireless transceiver, and wherein the set of rules comprises a rule stipulating that data from the central unit is only accepted by the security module when the wireless transceiver is placed in the off-mode.4. The implantable controller according to embodiment 3, wherein the set of rules comprises a rule stipulating that data from the central unit is only accepted when the wireless transceiver has been placed in the off-mode for a specific time period. 5. The implantable controller according to any one of the preceding embodiments wherein the central unit is configured to verify a digitalsignature of the received data from the external device and on a positive verification send the received data to the security module. 6. The implantable controller according to embodiment 4, wherein the set of rules comprises a rule stipulating that data from the central unit is only accepted when the digital signature of the received communication has been verified by the central unit. 7. The implantable controller according to any one of the preceding embodiments, wherein the central unit is configured to verify the size of the received data from the external device.8. The implantable controller according to embodiment 7, wherein the set of rules comprises a rule stipulating that data from the central unit is only accepted when the size of the received data has been verified by the central unit. 9. The implantable controller according to any one of the preceding embodiments, wherein: the wireless transceiver is configured to receive data from the external device being encrypted with at least a first and second layer of encryption, the central unit is configured to decrypt a first layer of decryption of the data to obtain a first decrypted data, and transmit the first decrypted data comprising the second layer of encryption to the security model, and the security module is configured to decrypt the second layer of encryption of the first decrypted data and transmit the at least one instruction to the implantable medical. 10. The implantable controller according to embodiment 9, wherein the central unit is configured to decrypt a portion of the data comprising a digital signature, such that the digital signature can be verified by the central unit. 11. The implantable controller according to embodiment 9, wherein the central unit is configured to decrypt a portion of the data comprising message size information, such that the data size can be verified by the central unit. 12. The implantable controller according to embodiment 9, wherein the central unit is configured to decrypt a first and second portion of the data, and wherein the first portion comprises a checksum for verifying the authenticity of the second portion. 13. The implantable controller according to embodiment 4, wherein the set of rules comprises a rule related to the rate of data transfer between the central unit and the security module.14. The implantable controller according to any one of embodiments 9 – 13, wherein the security module is configured to decrypt a portion of the data comprising a digital signature, encrypted with the second layer of encryption, such that the digital signature can be verified by the security module.15. The implantable controller according to any one of embodiments 4 – 14, wherein the central unit is only able to decrypt a portion of the data received from the external device when the wireless transceiver is placed in the off-mode.16. The implantable controller according to any one of embodiments 4 – 15, wherein the security unit is only able to communicate the at least one instruction to the implantable medical device when the wireless transceiver is placed in the off-mode. 17. The implantable controller according to any one of the preceding embodiments, wherein the implantable controller is configured to: receive, using the wireless transceiver, a message from the external device comprising a first un-encrypted portion and a second encrypted portion, decrypt the encrypted portion, and use the decrypted portion to verify the authenticity of the un-encrypted portion. 18. The implantable controller according to any one of embodiment 17, wherein the un-encrypted portion comprises at least a portion of the at least one instruction to the implantable medical device. 19. The implantable controller according to any one of the preceding embodiments, wherein the implantable controller is configured to: receive, using the wireless transceiver, a message from the external device comprising information related to at least one of: aphysiological parameter of the patient and a physical parameter of the implanted medical device, and use the received information to verify the authenticity of the message. 20. The implantable controller according to embodiment 19, wherein the physiological parameter of the patient comprises at least one of: atemperature, a heart rate and a saturation value. 21. The implantable controller according to embodiment 19, wherein the physical parameter of the implanted medical device comprises at least one of: a current setting or value of the implanted medical device, a prior instruction sent to the implanted medical device or an ID of the implanted medical device.22. The implantable controller according to any one of embodiments 19 – 21, wherein the portion of the message comprising the information is encrypted, and wherein the central unit is configured to transmit the encrypted portion to the security module. 23. The implantable controller according to any one of the preceding embodiments, wherein the security module comprises a hardware security module comprising at least one hardware-based key. 24. The implantable controller according to embodiment 23, wherein the hardware-based key corresponds to a hardware-based key in the external device. 25. The implantable controller according to embodiment 23, wherein the hardware-based key corresponds to a hardware-based key on a key-card connectable to the external device. 26. The implantable controller according to any one of the preceding embodiments, wherein the security module comprises a software security module comprising at least one software-based key. 27. The implantable controller according to embodiment 26, wherein the software-based key corresponds to a software-based key in the external device. 28. The implantable controller according to embodiment 26, wherein the software-based key corresponds to a software-based key on a key- card connectable to the external device. 29. The implantable controller according to any one of the preceding embodiments, wherein the security module comprises a combination of a software-based key and a hardware-based key. 30. The implantable controller according to any one of the preceding embodiments, wherein the security module comprises at least one crypto processor. 31. The implantable controller according to any one of the preceding embodiments, wherein the wireless transceiver is configured to receive communication from a handheld external device.32. The implantable controller according to any one of the preceding embodiments, wherein the at least one instruction to the implantable medical device comprises an instruction for changing an operational state of the implantable medical device. 33. The implantable controller according to any one of the preceding embodiments, wherein the wireless transceiver is configured to communicate wirelessly with the external device using electromagnetic waves at a frequency below 100 kHz. 34. The implantable controller according to embodiment 33, wherein the wireless transceiver is configured to communicate wirelessly with the external device using electromagnetic waves at a frequency below 40 kHz. 35. The implantable controller according to any one of the preceding embodiments, wherein: the wireless transceiver is configured to communicate wirelessly with the external device using a first communication protocol, the central unit is configured to communicate with the security module using a second communication protocol, and the first and second communication protocols are different. 36. The implantable controller according to any one of the preceding embodiments, wherein the wireless transceiver is configured to communicate wirelessly with the external device using a standard network protocol. 37. The implantable controller according to embodiment 36, wherein the standard network protocol is selected from a list comprising: RFIDtype protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol.38. The implantable controller according to any one of embodiments 1 – 35, wherein the wireless transceiver is configured to communicate wirelessly with the external device using a proprietary network protocol.39. The implantable controller according to any one of embodiments 1 – 38, wherein the wireless transceiver comprises a UWB transceiver. 40. The implantable controller according to any one of the preceding embodiments, wherein the security module and the central unit are comprised in a controller. 41. The implantable controller according to any one of the preceding embodiments, wherein the central module and the security module are implemented in a respective processor on a chip. 42. The implantable controller according to embodiment 40 or 41, wherein the wireless transceiver is comprised in the controller. 43. The implantable controller according to any one of the preceding embodiments, wherein the implantable medical device is an implantable medical device configured to exert a force on a body portion of the patient. 44. The implantable controller according to any one of the preceding embodiments, wherein the implantable medical device comprises an electrical motor and wherein the controller is configured for controlling the electrical motor. ASPECT 331SE eHealth General Security Module 1. An implantable controller for an implantable medical device, the implantable controller comprises: a wireless transceiver for communicating wirelessly with an external device, a security module, and a central unit configured to be in communication with the wireless transceiver, the security module and the implantable medical device: the wireless transceiver is configured to receive communication from the external device including at least one instruction to the implantable medical device, and transmit the received communication to the central unit, the central unit is configured to send secure communication to the security module, derived from the received communication from the external device, and the security module is configured to at least one of: decrypt at least a portion of the secure communication, and verify the authenticity of the secure communication, and the security module is configured to transmit a response communication to the central unit, and the central unit is configured to communicate the at least one instruction to the implantable medical device, the at least one instruction being based on: the response communication, or a combination of the response communication and the received communication from the external device. 2. The implantable controller according to embodiment 1, wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/orintestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall.3. The implantable controller according to embodiment 1, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.4. The implantable controller according to embodiment 1, wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.5. The implantable controller according to embodiment 1, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 6. The implantable controller according to any one of the preceding embodiments, wherein the security module comprises a set of rules for accepting communication from the central unit. 7. The implantable controller according to embodiment 6, wherein the wireless transceiver is configured to be placed in an off-mode, in which no wireless communication can be transmitted or received by the wireless transceiver, and wherein the set of rules comprises a rule stipulating that communication from the central unit is only accepted when the wireless transceiver is placed in the off-mode. 8. The implantable controller according to embodiment 7, wherein the set of rules comprises a rule stipulating that communication from the central unit is only accepted when the wireless transceiver has been placed in the off-mode for a specific time period. 9. The implantable controller according to any one of the preceding embodiments wherein the central unit is configured to verify a digital signature of the received communication from the external device. 10. The implantable controller according to embodiment 9, wherein the set of rules comprises a rule stipulating that communication fromthe central unit is only accepted when the digital signature of the received communication has been verified by the central unit. 11. The implantable controller according to any one of the preceding embodiments, wherein the central unit is configured to verify the size of the received communication from the external device.12. The implantable controller according to embodiment 11, wherein the set of rules comprises a rule stipulating that communication from the central unit is only accepted when the size of the received communication has been verified by the central unit. 13. The implantable controller according to any one of the preceding embodiments, wherein: the wireless transceiver is configured to receive a message from the external device being encrypted with at least a first and second layer of encryption, the central unit is configured to decrypt a first layer of decryption and transmit at least a portion of the message comprising the second layer of encryption to the security model, andthe security module is configured to decrypt the second layer of encryption and transmit a response communication to the central unit based on the portion of the message decrypted by the security module.14. The implantable controller according to embodiment 13, wherein the central unit is configured to decrypt a portion of the message comprising a digital signature, such that the digital signature can be verified by the central unit.15. The implantable controller according to embodiment 14, wherein the central unit is configured to decrypt a portion of the message comprising message size information, such that the message size can be verified by the central unit. 16. The implantable controller according to embodiment 15, wherein the central unit is configured to decrypt a first and second portion of the message, and wherein the first portion comprises a checksum for verifying the authenticity of the second portion.17. The implantable controller according to any one of embodiments 13 – 16, wherein the response communication transmitted from the security module comprises a checksum, and wherein the central unit is configured to verify the authenticity of at least a portion of the message decrypted by the central unit using the received checksum. 18. The implantable controller according to embodiment 12, wherein the set of rules comprises a rule related to the rate of data transfer between the central unit and the security module.19. The implantable controller according to any one of embodiments 13 – 18, wherein the security module is configured to decrypt a portion of the message comprising a digital signature, encrypted with the second layer of encryption, such that the digital signature can be verified by the security module.20. The implantable controller according to any one of embodiments 8 – 19, wherein the central unit is only capable of decrypting a portion of the receive communication from the external device when the wireless transceiver is placed in the off-mode.21. The implantable controller according to any one of embodiments 8 – 20, wherein the central unit is only capable of communicating the at least one instruction to the implantable medical device when the wireless transceiver is placed in the off-mode. 22. The implantable controller according to any one of the preceding embodiments, wherein the implantable controller is configured to: receive, using the wireless transceiver, a message from the external device comprising a first un-encrypted portion and a second encrypted portion, decrypt the encrypted portion, and use the decrypted portion to verify the authenticity of the un-encrypted portion. 23. The implantable controller according to embodiment 22, wherein the central unit is configured to: transmit the encrypted portion to the security module, receive a response communication from the security module, based on information contained in the encrypted portion being decrypted by the security module, and use the response communication to verify the authenticity of the un-encrypted portion.24. The implantable controller according to any one of embodiments 22 – 23, wherein the un-encrypted portion comprises at least a portion of the at least one instruction to the implantable medical device. 25. The implantable controller according to any one of the preceding embodiments, wherein the implantable controller is configured to: receive, using the wireless transceiver, a message from the external device comprising information related to at least one of: a physiological parameter of the patient and a physical parameter of the implanted medical device, and use the received information to verify the authenticity of the message. 26. The implantable controller according to embodiment 25, wherein the physiological parameter of the patient comprises at least one of: a temperature, a heart rate and a saturation value. 27. The implantable controller according to embodiment 25, wherein the physical parameter of the implanted medical device comprises at least one of: a current setting or value of the implanted medical device, a prior instruction sent to the implanted medical device or an ID of the implanted medical device.28. The implantable controller according to any one of embodiments 25 – 27, wherein the portion of the message comprising theinformation is encrypted, and wherein the central unit is configured to transmit the encrypted portion to the security module and receive a response communication from the security module, based on the information having been decrypted by the security module. 29. The implantable controller according to any one of the preceding embodiments, wherein the security module comprises a hardware security module comprising at least one hardware-based key. 30. The implantable controller according to embodiment 29, wherein the hardware-based key corresponds to a hardware-based key in the external device. 31. The implantable controller according to embodiment 29, wherein the hardware-based key corresponds to a hardware-based key on a key-card connectable to the external device. 32. The implantable controller according to any one of the preceding embodiments, wherein the security module comprises a software security module comprising at least one software-based key. 33. The implantable controller according to embodiment 32, wherein the software-based key corresponds to a software-based key in the external device. 34. The implantable controller according to embodiment 32, wherein the software-based key corresponds to a software-based key on a key- card connectable to the external device. 35. The implantable controller according to any one of the preceding embodiments, wherein the security module comprises a combination of a software-based key and a hardware-based key. 36. The implantable controller according to any one of the preceding embodiments, wherein the security module comprises at least one crypto processor. 37. The implantable controller according to any one of the preceding embodiments, wherein the wireless transceiver is configured to receive communication from a handheld external device. 38. The implantable controller according to any one of the preceding embodiments, wherein the at least one instruction to the implantable medical device comprises an instruction for changing an operational state of the implantable medical device. 39. The implantable controller according to any one of the preceding embodiments, wherein the wireless transceiver is configured to communicate wirelessly with the external device using electromagnetic waves at a frequency below 100 kHz.40. The implantable controller according to embodiment 39, wherein the wireless transceiver is configured to communicate wirelessly with the external device using electromagnetic waves at a frequency below 40 kHz. 41. The implantable controller according to any one of the preceding embodiments, wherein: the wireless transceiver is configured to communicate wirelessly with the external device using a first communication protocol, the central unit is configured to communicate with the security module using a second communication protocol, and the first and second communication protocols are different. 42. The implantable controller according to any one of the preceding embodiments, wherein the wireless transceiver is configured to communicate wirelessly with the external device using a standard network protocol. 43. The implantable controller according to embodiment 38, wherein the standard network protocol is selected from a list comprising: RFIDtype protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol.44. The implantable controller according to any one of embodiments 1 – 43, wherein the wireless transceiver is configured to communicate wirelessly with the external device using a proprietary network protocol.ASPECT 384SE - eHealth_General_Communication_Dual1. An external device configured for communication with an implantable medical device when implanted in a patient, the external device comprising: at least one first wireless transceiver configured for communication with the implantable medical device using a first network protocol, for determining a distance between the external device and the implantable medical device, and at least one second wireless transceiver configured for communication with the implantable medical device using a second network protocol, for transferring data between the external device and the implantable medical device, wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall.2. An external device configured for communication with an implantable medical device when implanted in a patient, the external device comprising: at least one first wireless transceiver configured for communication with the implantable medical device using a first network protocol, for determining a distance between the external device and the implantable medical device, and at least one second wireless transceiver configured for communication with the implantable medical device using a second network protocol, for transferring data between the external device and the implantable medical device, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.3. An external device configured for communication with an implantable medical device when implanted in a patient, the externaldevice comprising: at least one first wireless transceiver configured for communication with the implantable medical device using a first network protocol, for determining a distance between the external device and the implantable medical device, and at least one second wireless transceiver configured for communication with the implantable medical device using a second network protocol, for transferring data between the external device and the implantable medical device, wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, anda casing enclosing at least the vibration generating unit.4. An external device configured for communication with an implantable medical device when implanted in a patient, the external device comprising:at least one first wireless transceiver configured for communication with the implantable medical device using a first network protocol, for determining a distance between the external device and the implantable medical device, and at least one second wireless transceiver configured for communication with the implantable medical device using a second network protocol, for transferring data between the external device and the implantable medical device, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The external device according to any one of the preceding embodiments, wherein the first wireless transceiver comprises an UWB transceiver. 6. The external device according to any one of the preceding embodiments, wherein the first wireless transceiver is configured for transcutaneous energy transfer for at least one of: powering an energy consuming component of the implantable medical device, and charging an implantable energy storage unit. 7. The external device according to any one of the preceding embodiments, wherein the second network protocol is a standard network protocol. 8. The external device according to any one of the preceding embodiments, wherein the second wireless transceiver comprises a Bluetooth transceiver.9. The external device according to any one of the preceding embodiments, wherein the external device is further configured to communicate with a second external device using said at least one wireless transceiver. 10. The external device according to any one of the preceding embodiments, wherein the external device is configured for determining a distance between the external device and the implantable medical device by determining the RSSI.11. The external device according to any one of embodiments 7 – 10, wherein the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol.12. The external device according to any one of the preceding embodiments, wherein a communication range of the first network protocol is less than a communication range of the second network protocol.13. The external device according to any one of the preceding embodiments, wherein a frequency band of the first network protocol differs from a frequency band of the second network protocol.14. The external device according to any one of the preceding embodiments, wherein the external device is configured to authenticate the implantable medical device if the determined distance between the external device and the implantable medical device is less than a predetermined threshold value.15. The external device according to embodiment 14, wherein the external device is configured to allow the transfer of data between the external device and the implantable medical device after the implantable medical device has been authenticated.16. The external device according to any one of the preceding embodiments, wherein the external device is one from the list of: a wearable external device, and a handset. 17. A medical system comprising the external system according to any one of the preceding embodiments and an implantable medical device. 18. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to be fixated to a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portions, and a main portion, wherein: the first and second members are connected to the main portion,and wherein at least the second member is pivotally connected to the main portion, such that the second member can be displaced in the first direction relative to the first member by the second member pivoting in relation to the main portion, andthe operation device comprises at least one eccentric rotatable engagement member configured to engage at least the second member such that the eccentric rotation of the engagement member causes the second member to pivot in relation to the main portion for displacing the second member relative to the first member for stretching the stomach wall between the first and second portions. 19. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to be fixated to a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to be fixated to a second portion of the stomach wall, a hydraulic operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portions, and a main portion, wherein: the first and second members are connected to the main portion, and wherein at least the second member is configured to bend or pivot in relation to the main portion, such that the second member can be displaced in the first direction relative to the first member by the second member bending or pivoting in relation to the main portion, at least the second member comprises a fluid chamber at leastpartially enclosed by a flexible wall portion, and the flexible wall portion causes the second member to bend orpivot when hydraulic fluid is moved to or from the fluid chamber for stretching the stomach wall between the first and second portions. 20. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to be fixated to a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction, for stretching the stomach wall between the first and second portions, and a main portion, wherein: the first and second members are connected to the main portion, at least the second member is configured to bend or pivot in relation to the main portion, such that the second member can be displaced in a direction away from the first member by the second member bending or pivoting in relation to the main portion, the operation device comprises a first flexible cable for pulling on the second member for displacing the second member in the direction away from the first member, and the first flexible cable is fixated to the second member at the distal half of thereof. 21. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to engage a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to engage a second portion of the stomach wall, a main portion, wherein the first and second members are connected to the main portion,an operation device for operating at least the second member to displace the second member in a direction away from the first member, for stretching the stomach wall between the first and second portions, wherein a portion of the operation device is placed in a remote unit configured to be placed at a remote location in the body of the patient, and a force transferring element configured to transfer force hydraulically or mechanically from the remote unit to the main portion, for operating the second member. 22. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for activelystretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portion, an acoustic sensor configured to sense at least one sound related to the patient swallowing, and a controller configured to: receive a signal from the acoustic sensor, and control the operation device on the basis of the signal received from the acoustic sensor. 23. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portion, a sensor configured to: sense at least one parameter related to the patient swallowing, and be fixated to a structure of the body comprising bone, and a controller configured to: receive a signal from the sensor, and control the operation device on the basis of the signal received from the sensor. 24. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising: a first stomach engager configured to engage a first portion of the stomach wall, and a second stomach engager portion configured to engage a second portion of the stomach wall, a second member comprising: a first stomach engager configured to engage a third portion of the stomach wall, and a second stomach engager portion configured to engage a fourth portion of the stomach wall, a main portion, wherein the first and second members are operably connected to the main portion, an operation device comprising an actuator, wherein the operation device is configured to displace the actuator, such that the actuator is configured to: in a first state, operate the first member for displacing the first stomach engager of the first member in relation to the second stomach engager of the first member, for stretching the stomach wall, and in a second state, operate the second member for displacing the first stomach engager of the second member in relation to the second stomach engager of the second member, for stretching the stomach wall. 25. The medical system according to embodiment 17, wherein the implantable medical device comprises an implantable operation device for operating a body engaging portion of a medical implant, the implantable operation device comprising: an electrical machine for transforming electrical energy to mechanical force, a flexible shaft for transferring the mechanical force to a body engaging portion, and a pre-tensioning device for creating a pre-tension in the flexible shaft. 26. The medical system according to embodiment 17, wherein the implantable medical device comprises an implantable operation device for operating a body engaging portion of a medical implant, the implantable operation device comprising: an electrical machine for transforming electrical energy to mechanical force, a transmission for transforming a mechanical force created by electrical transforming device from a force having a first speed and a first strength to a force having a second lower speed and a second higher strength, wherein the transmission comprises: a first and second pulley, a flexible element configured to be placed around the first and second pulley, wherein the flexible element is configured to be pulled by the force having the first speed and first strength, causing the first and second pulley to displace in relation to each other with the force having the second lower speed and the second higher strength, thereby creating the transmission. 27. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a second member configured to be fixated to the stomach wall of the patient and comprising a closed curve, a first member configured to be fixated to the stomach wall of the patient within the footprint of the second member, wherein the first member is operably connected to the second member such that the first member can be displaced: relative to the second member, and within the footprint of the second member, for stretching a portion of the stomach wall of the patient between the second and first member. 28. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a second member configured to be fixated to the stomach wall of the patient, and an operable first member connected to the second member and configured to be fixated to the stomach wall at least partially within the footprint of the second member, wherein the first member is configured to be operated to deform such that a first portion of the first member is moved away from a first portion of the second member, for stretching a portion of the stomach wall between the first portion of the first member and the first portion of the second member. 29. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for activelystretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: an operable first member configured to be fixated to a first portion of the stomach wall, and a second member configured to be fixated to a second portion of the stomach wall, and an operation device, characterized in that the operation device is configured to pull at least a portion of the first member in a first direction away from at least one portion of the second member, for stretching a portion of the stomach wall between the first portion of the stomach wall and the second portion of the stomach wall for creating the sensation of satiety. 30. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: an operable first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, a mechanical operation device configured to move at least a portion of the first member in a first direction away from at least one portion of the second member, for stretching a portion of the stomach wall between the first portion of the stomach wall and the second portion ofthe stomach wall, for creating the sensation of satiety, wherein a portion of the operation device is placed in a remote unit configured to be placed at a remote location in the body of the patient, and a force transferring element configured to transfer mechanical force from the remote unit to the first member, for operating the first member. 31. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: an operable first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, an operation device configured to: move at least a portion of the first member in a first direction relative to atleast one portion of the second member, for stretching a portion of the stomach wall between the first and second members, and at least one of: move at least a portion of the operable first member in a second direction relative to at least one portion of the second member, and move an operable third member in a third direction for stretching a portion of the stomach wall between the third and second members, and a mechanical switching device configured to switch the operation device: from operating the first member to move in the first direction to operating the first member to move in the second direction, or from operating the first member to move in the first direction to operating the third member to move in the third direction. 32. The medical system according to embodiment 17, wherein the implantable medical device comprises an implantable operation device for operating a body engaging portion of a medical implant, the implantable operation device comprising: an electrical machine for transforming electrical energy to mechanical force, a transmission for transforming rotational force created by the electrical machine to a linear force, a shaft for transferring rotational and linear force from the operation device to the body engaging portion of the medical implant,a switch placed between the electrical machine and the shaft, wherein the switch is configured to switch the force exerted on shaft such that: in a first state, a rotational force is exerted on the shaft, and in a second, a linear force is exerted in the shaft. 33. The medical system according to embodiment 17, wherein the implantable medical device comprises an apparatus for treating obesity of a patient having a stomach with a food cavity, the apparatus comprising: - a volume filling device adapted to be at least substantially invaginated by a stomach wall portion of the patient with the outer surface of the volume filling device resting against the stomach wall, such that the volume of the food cavity is reduced in size by a volume substantially exceeding the volume of the volume filling device, characterized by - at least one adjustable stretching device adapted to be at least substantially invaginated by a stomach wall portion of the patient with the outer surface of the stretching device resting against the stomach wall and adapted to stretch a portion of stomach wall, and - a fluid connection device interconnecting the volume filling device and the stretching device. 34. The medical system according to embodiment 17, wherein the implantable medical device comprises a device for treating obesity of a patient, the device comprising: at least one operable stretching device (10; 110) implantable in the patient and adapted to stretch a portion of the patient's stomach wall (12), and an implantable control unit (42) for automatically controlling the operable stretching device, when the control unit and stretching device are implanted, to stretch the stomach wall portion in connection with the patient eating such that satiety is created, characterized in that the stretching device comprises a first and a second engaging part (10''; 110a; 110b; 210a; 210b), wherein: the first part is adapted to be engaged to a first area of the stomach wall, and the second part is adapted to be engaged to a second area of the stomach wall, and wherein the stretching device is adapted to stretch a portion of the stomach wall between the first area and the second area. 35. The medical system according to embodiment 17, wherein the implantable medical device comprises an obesity treatment device comprising: - at least one operable stretching device (10; 10"; 110a; 110b; 410b; 50; 810) implantable in a patient and adapted to stretch a portion of the patient's stomach wall (12) and - an implantable operation device (90; 42; 54; 40; 217; 218; 452) for operating the stretching device, when implanted, to stretch the stomach wall portion such that satiety is created, characterized in that the operable stretching device is adapted to be placed against the outside of the stomach wall.36. The medical system according to embodiment 17, wherein the implantable medical device comprises a device for treating obesity of a patient, the device comprising: at least one operable stretching device implantable in the patient and adapted to stretch a portion of the patient’s stomach wall, and an implantable control unit for controlling the operable stretching device, when the control unit and the stretching device areimplanted, to stretch the stomach wall portion in connection with the patient eating such that satiety is created, characterized in that the stretching device comprises a first engaging part and a second engaging part, wherein: the first engaging part is adapted to be engaged to a first area of the stomach wall, and the second engaging part is adapted to be engaged to a second area of the stomach wall, and wherein the stretching device is adapted to stretch a portion of the stomach wall between the first area and the second area. 37. The medical system according to embodiment 17, wherein the implantable medical device comprises a device for treating obesity of a patient, the device comprising:a. at least one operable stretching device implantable in the patient operating via mechanical, pneumatic, and/or hydraulic action to stretch a portion of the patient’s stomach wall, and b. an implantable control unit for automatically controlling the operable stretching device, when the control unit and stretching deviceare implanted, to stretch the stomach wall portion in connection with the patient eating such that satiety is created.38. An implantable medical device configured for communication with an external device, the implantable medical device comprising: at least one first wireless transceiver configured for communication with the external device using a first network protocol, for determining a distance between the external device and the implantable medical device, andat least one second wireless transceiver configured for communication with the external device using a second network protocol, for transferring data between the external device and the implantable medical device, wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue ofthe stomach wall or the intestine wall.39. An implantable medical device configured for communication with an external device, the implantable medical device comprising: at least one first wireless transceiver configured for communication with the external device using a first network protocol, for determining a distance between the external device and the implantable medical device, and at least one second wireless transceiver configured for communication with the external device using a second network protocol, for transferring data between the external device and the implantable medical device, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.40. An implantable medical device configured for communication with an external device, the implantable medical device comprising: at least one first wireless transceiver configured for communication with the external device using a first network protocol, for determining a distance between the external device and the implantable medical device, and at least one second wireless transceiver configured for communication with the external device using a second network protocol, for transferring data between the external device and the implantable medical device, wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.41. An implantable medical device configured for communication with an external device, the implantable medical device comprising:at least one first wireless transceiver configured for communication with the external device using a first network protocol, for determininga distance between the external device and the implantable medical device, and at least one second wireless transceiver configured for communication with the external device using a second network protocol, for transferring data between the external device and the implantable medical device, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina.ASPECT 385SE - eHealth_General_General_remote display portal1. An external device configured for communication with an implantable medical device when implanted in a patient, the patient external device comprising: a wireless communication unit configured for wireless transmission of control commands to the implantable medical device and configured for wireless communication with a patient display device, and a computing unit configured for running a control software for creating the control commands for the operation of the implantable medical device, wherein the computing unit is configured to:transmit a control interface as a remote display portal to a patient display device configured to display the control interface to a user, receive user input from the patient display device, and transform the user input into the control commands for wireless transmission to the implantable medical device, wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall.2. An external device configured for communication with an implantable medical device when implanted in a patient, the patient external device comprising: a wireless communication unit configured for wireless transmission of control commands to the implantable medical device and configured for wireless communication with a patient display device, and a computing unit configured for running a control software for creating the control commands for the operation of the implantable medical device, wherein the computing unit is configured to:transmit a control interface as a remote display portal to a patient display device configured to display the control interface to a user, receive user input from the patient display device, and transform the user input into the control commands for wireless transmission to the implantable medical device, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.3. An external device configured for communication with an implantable medical device when implanted in a patient, the patient external device comprising: a wireless communication unit configured for wireless transmission of control commands to the implantable medical device and configured for wireless communication with a patient display device, and a computing unit configured for running a control software for creating the control commands for the operation of the implantable medical device, wherein the computing unit is configured to: transmit a control interface as a remote display portal to a patient display device configured to display the control interface to a user, receive user input from the patient display device, and transform the user input into the control commands for wireless transmission to the implantable medical device, wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.4. An external device configured for communication with an implantable medical device when implanted in a patient, the patient external device comprising: a wireless communication unit configured for wireless transmission of control commands to the implantable medical device and configured for wireless communication with a patient display device, and a computing unit configured for running a control software for creating the control commands for the operation of the implantable medical device, wherein the computing unit is configured to: transmit a control interface as a remote display portal to a patient display device configured to display the control interface to a user, receive user input from the patient display device, and transform the user input into the control commands for wireless transmission to the implantable medical device, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The external device according to any one of embodiments 1-4, wherein the wireless communication unit comprises a wireless transceiver for: wireless transmission of control commands to the implantable medical device, and wireless transmission of the control interface as the remote display portal to the patient display device. 6. The external device according to any one of embodiments 1-4, wherein the wireless communication unit comprises: a first wireless transceiver for wireless transmission of control commands to the implantable medical device, and a second wireless transceiver for wireless transmission of the control interface to the patient display device. 7. The external device according to any one of the preceding embodiments, wherein the wireless communication unit is configured for wireless communication with the patient display device using a standard network protocol. 8. The external device according to any one of the preceding embodiments, wherein the wireless communication unit is configured for wireless communication with the implantable medical device using a proprietary network protocol. 9. The external device according to any one of the preceding embodiments, wherein the wireless communication unit comprises a Bluetooth transceiver. 10. The external device according to embodiment 9, wherein at least one of the first and second wireless transceiver comprises a Bluetooth transceiver.11. The external device according to any one of embodiments 1 – 8, wherein the wireless communication unit comprises a UWB transceiver. 12. The external device according to embodiment 11, wherein at least one of the first and second wireless transceiver comprises a UWB transceiver. 13. The external device according to any one of embodiments 1-4, wherein the wireless communication unit comprises: at least one first wireless transceiver configured for communication with the implantable medical device using a first network protocol, for determining a distance between the patient external device and the implantable medical device, and at least one second wireless transceiver configured for communication with the implantable medical device using a second network protocol, for transferring data between the patient external device and the implantable medical device. 14. The external device according to embodiment 6, wherein the first wireless transceiver is configured for transcutaneous energy transfer for at least one of: powering an energy consuming component of the implantable medical device, and charging an implantable energy storage unit.15. The external device according to embodiment 7, wherein the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol.16. The external device according to any one of embodiments 6-15, wherein a communication range of the first wireless transceiver is less than a communication range of the second wireless transceiver. 17. A medical system comprising the external system according to any one of the preceding embodiments and an implantable medical device.18. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to be fixated to a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portions, and a main portion, wherein:the first and second members are connected to the main portion, and wherein at least the second member is pivotally connected to the main portion, such that the second member can be displaced in the first direction relative to the first member by the second member pivoting in relation to the main portion, and the operation device comprises at least one eccentric rotatable engagement member configured to engage at least the second member such that the eccentric rotation of the engagement member causesthe second member to pivot in relation to the main portion for displacing the second member relative to the first member for stretching the stomach wall between the first and second portions. 19. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to be fixated to a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to be fixated to a second portion of the stomach wall, a hydraulic operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portions, and a main portion, wherein: the first and second members are connected to the main portion, and wherein at least the second member is configured to bend or pivot in relation to the main portion, such that the second member can be displaced in the first direction relative to the first member by the second member bending or pivoting in relation to the main portion, at least the second member comprises a fluid chamber at least partially enclosed by a flexible wall portion, and the flexible wall portion causes the second member to bend orpivot when hydraulic fluid is moved to or from the fluid chamber for stretching the stomach wall between the first and second portions. 20. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for activelystretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to be fixated to a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction, for stretching the stomach wall between the first and second portions, and a main portion, wherein: the first and second members are connected to the main portion, at least the second member is configured to bend or pivot in relation to the main portion, such that the second member can be displaced in a direction away from the first member by the secondmember bending or pivoting in relation to the main portion, the operation device comprises a first flexible cable for pulling on the second member for displacing the second member in the direction away from the first member, and the first flexible cable is fixated to the second member at the distal half of thereof. 21. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to engage a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to engage a second portion of the stomach wall,a main portion, wherein the first and second members are connected to the main portion,an operation device for operating at least the second member to displace the second member in a direction away from the first member,for stretching the stomach wall between the first and second portions, wherein a portion of the operation device is placed in a remote unit configured to be placed at a remote location in the body of the patient, and a force transferring element configured to transfer force hydraulically or mechanically from the remote unit to the main portion, for operating the second member. 22. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portion, an acoustic sensor configured to sense at least one sound related to the patient swallowing, and a controller configured to: receive a signal from the acoustic sensor, and control the operation device on the basis of the signal received from the acoustic sensor. 23. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portion, a sensor configured to: sense at least one parameter related to the patient swallowing, and be fixated to a structure of the body comprising bone, and a controller configured to: receive a signal from the sensor, and control the operation device on the basis of the signal received from the sensor.24. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising: a first stomach engager configured to engage a first portion of the stomach wall, and a second stomach engager portion configured to engage a second portion of the stomach wall, a second member comprising: a first stomach engager configured to engage a third portion of the stomach wall, and a second stomach engager portion configured to engage a fourth portion of the stomach wall, a main portion, wherein the first and second members are operably connected to the main portion, an operation device comprising an actuator, wherein the operation device is configured to displace the actuator, such that the actuator is configured to: in a first state, operate the first member for displacing the first stomach engager of the first member in relation to the second stomach engager of the first member, for stretching the stomach wall, and in a second state, operate the second member for displacing the first stomach engager of the second member in relation to the second stomach engager of the second member, for stretching the stomach wall. 25. The medical system according to embodiment 17, wherein the implantable medical device comprises an implantable operation device for operating a body engaging portion of a medical implant, the implantable operation device comprising: an electrical machine for transforming electrical energy to mechanical force, a flexible shaft for transferring the mechanical force to a body engaging portion, and a pre-tensioning device for creating a pre-tension in the flexible shaft. 26. The medical system according to embodiment 17, wherein the implantable medical device comprises an implantable operation device for operating a body engaging portion of a medical implant, the implantable operation device comprising: an electrical machine for transforming electrical energy to mechanical force, a transmission for transforming a mechanical force created by electrical transforming device from a force having a first speed and a first strength to a force having a second lower speed and a second higher strength, wherein the transmission comprises: a first and second pulley, a flexible element configured to be placed around the first and second pulley, wherein the flexible element is configured to be pulled by the force having the first speed and first strength, causing the first and second pulley to displace in relation to each other with the force having the second lower speed and the second higher strength, thereby creating the transmission.27. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a second member configured to be fixated to the stomach wall of the patient and comprising a closed curve, a first member configured to be fixated to the stomach wall of the patient within the footprint of the second member, wherein the first member is operably connected to the second member such that the first member can be displaced:relative to the second member, and within the footprint of the second member, for stretching a portion of the stomach wall of the patient between the second and first member. 28. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a second member configured to be fixated to the stomach wall of the patient, and an operable first member connected to the second member and configured to be fixated to the stomach wall at least partially within the footprint of the second member, wherein the first member is configured to be operated to deform such that a first portion of the first member is moved away from a first portion of the second member, for stretching a portion of the stomach wall between the first portion of the first member and the first portion of the second member. 29. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: an operable first member configured to be fixated to a first portion of the stomach wall, and a second member configured to be fixated to a second portion of the stomach wall, and an operation device, characterized in that the operation device is configured to pull at least a portion of the first member in a first direction away from at least one portion of the second member, for stretching a portion of the stomach wall between the first portion of the stomach wall and the second portion of the stomach wall for creating the sensation of satiety.30. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: an operable first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, a mechanical operation device configured to move at least a portion of the first member in a first direction away from at least one portion of the second member, for stretching a portion of the stomach wall between the first portion of the stomach wall and the second portion of the stomach wall, for creating the sensation of satiety, wherein a portion of the operation device is placed in a remote unit configured to be placed at a remote location in the body of the patient, and a force transferring element configured to transfer mechanical force from the remote unit to the first member, for operating the first member. 31. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: an operable first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, an operation device configured to: move at least a portion of the first member in a first direction relative to at least one portion of the second member, for stretching a portion of the stomach wall between the first and second members, and at least one of: move at least a portion of the operable first member in a second direction relative to at least one portion of the second member, and move an operable third member in a third direction for stretching a portion of the stomach wall between the third and second members, and a mechanical switching device configured to switch the operation device:from operating the first member to move in the first direction to operating the first member to move in the second direction, or from operating the first member to move in the first direction to operating the third member to move in the third direction. 31. The medical system according to embodiment 17, wherein the implantable medical device comprises an implantable operation device for operating a body engaging portion of a medical implant, the implantable operation device comprising: an electrical machine for transforming electrical energy to mechanical force, a transmission for transforming rotational force created by the electrical machine to a linear force, a shaft for transferring rotational and linear force from the operation device to the body engaging portion of the medical implant,a switch placed between the electrical machine and the shaft, wherein the switch is configured to switch the force exerted on shaft such that: in a first state, a rotational force is exerted on the shaft, and in a second, a linear force is exerted in the shaft.33. The medical system according to embodiment 17, wherein the implantable medical device comprises an apparatus for treating obesity of a patient having a stomach with a food cavity, the apparatus comprising:- a volume filling device adapted to be at least substantially invaginated by a stomach wall portion of the patient with the outersurface of the volume filling device resting against the stomach wall, such that the volume of the food cavity is reduced in size by a volume substantially exceeding the volume of the volume filling device, characterized by - at least one adjustable stretching device adapted to be at least substantially invaginated by a stomach wall portion of the patient withthe outer surface of the stretching device resting against the stomach wall and adapted to stretch a portion of stomach wall, and - a fluid connection device interconnecting the volume filling device and the stretching device. 34. The medical system according to embodiment 17, wherein the implantable medical device comprises a device for treating obesity of a patient, the device comprising: at least one operable stretching device (10; 110) implantable in the patient and adapted to stretch a portion of the patient's stomach wall (12), and an implantable control unit (42) for automatically controlling the operable stretching device, when the control unit and stretching device are implanted, to stretch the stomach wall portion in connection with the patient eating such that satiety is created, characterized in that the stretching device comprises a first and a second engaging part (10''; 110a; 110b; 210a; 210b), wherein: the first part is adapted to be engaged to a first area of the stomach wall, and the second part is adapted to be engaged to a second area of the stomach wall, and wherein the stretching device is adapted to stretch a portion of the stomach wall between the first area and the second area. 35. The medical system according to embodiment 17, wherein the implantable medical device comprises an obesity treatment device comprising: - at least one operable stretching device (10; 10"; 110a; 110b; 410b; 50; 810) implantable in a patient and adapted to stretch a portion of the patient's stomach wall (12) and - an implantable operation device (90; 42; 54; 40; 217; 218; 452) for operating the stretching device, when implanted, to stretch the stomach wall portion such that satiety is created, characterized in that the operable stretching device is adapted to be placed against the outside of the stomach wall. 36. The medical system according to embodiment 17, wherein the implantable medical device comprises a device for treating obesity of a patient, the device comprising: at least one operable stretching device implantable in the patient and adapted to stretch a portion of the patient’s stomach wall, and an implantable control unit for controlling the operable stretching device, when the control unit and the stretching device are implanted, to stretch the stomach wall portion in connection with the patient eating such that satiety is created, characterized in that the stretching device comprises a first engaging part and a second engaging part, wherein: the first engaging part is adapted to be engaged to a first area of the stomach wall, and the second engaging part is adapted to be engaged to a second area of the stomach wall, and wherein the stretching device is adapted to stretch a portion of the stomach wall between the first area and the second area. 37. The medical system according to embodiment 17, wherein the implantable medical device comprises a device for treating obesity of a patient, the device comprising: a. at least one operable stretching device implantable in the patient operating via mechanical, pneumatic, and/or hydraulic action to stretch a portion of the patient’s stomach wall, and b. an implantable control unit for automatically controlling the operable stretching device, when the control unit and stretching device are implanted, to stretch the stomach wall portion in connection with the patient eating such that satiety is created.ASPECT 386SE - eHealth_General_General_App_in_App1. A patient display device for communication with a patient external device for communication with an implantable medical device, when implanted, the patient display device comprising: a wireless communication unit, a display, and an input device for receiving implant control input from the user, wherein the patient display device is configured to: run a first application for wireless communication with a server and/or DDI, and run a second application for wireless communication with the patient external device for transmission of the implant control input to a remote display portal of the patient external device for the communication with the implantable medical device, wherein the secondapplication is configured to be accessed through the first application, wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall.2. A patient display device for communication with a patient external device for communication with an implantable medical device, when implanted, the patient display device comprising: a wireless communication unit, a display, andan input device for receiving implant control input from the user, wherein the patient display device is configured to: run a first application for wireless communication with a server and/or DDI, and run a second application for wireless communication with the patient external device for transmission of the implant control input to a remote display portal of the patient external device for the communication with the implantable medical device, wherein the second application is configured to be accessed through the first application, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.3. A patient display device for communication with a patient external device for communication with an implantable medical device, when implanted, the patient display device comprising: a wireless communication unit, a display, and an input device for receiving implant control input from the user, wherein the patient display device is configured to: run a first application for wireless communication with a server and/or DDI, and run a second application for wireless communication with the patient external device for transmission of the implant control input to a remote display portal of the patient external device for the communication with the implantable medical device, wherein the second application is configured to be accessed through the first application, wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.4. A patient display device for communication with a patient external device for communication with an implantable medical device, when implanted, the patient display device comprising: a wireless communication unit, a display, and an input device for receiving implant control input from the user, wherein the patient display device is configured to: run a first application for wireless communication with a server and/or DDI, and run a second application for wireless communication with the patient external device for transmission of the implant control input to a remote display portal of the patient external device for the communication with the implantable medical device, wherein the second application is configured to be accessed through the first application, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina.5. The patient display device according to any one of embodiments 1 – 4, wherein the first log-in is a PIN-based log-in.6. The patient display device according to any one of embodiments 1 – 4, wherein at least one of the first and second log-in is a log- in based on a biometric input or a hardware key.7. The patient display device according to any one of embodiments 1 – 6, wherein the patient display device further comprises an auxiliary wireless communication unit, and wherein the auxiliary wireless communication unit is configured to be disabled to enable wireless communication with the patient external device.8. The patient display device according to any one of embodiments 1 – 7, wherein the patient display device is configured to wirelessly receive an implant control interface as a remote display portal from the patient external device to be displayed on the display.9. The patient display device according to any one of embodiments 1 – 8, wherein the wireless communication unit is configured for wireless communication with the patient external device using a standard network protocol.10. The patient display device according to any one of embodiments 1 – 8, wherein the wireless communication unit is configured for wireless communication with the patient external device using a proprietary network protocol.11. The patient display device according to any one of embodiments 1 – 8, wherein the wireless communication unit is configured for wireless communication with the patient external device using a first network protocol and with the server using a second network protocol.12. The patient display device according to any one of embodiments 1 – 8, wherein the wireless communication unit is configured for wireless communication with the patient external device using a first frequency band and with the server using a second frequency band.13. The patient display device according to any one of embodiments 1 – 12, wherein the wireless communication unit comprises a Bluetooth transceiver.14. The patient display device according to any one of embodiments 1 – 13, wherein the wireless communication unit comprises a UWB transceiver.15. The patient display device according to embodiment 9, wherein the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol.16. The patient display device according to embodiment 7, wherein a communication range of the wireless communication unit is less than a communication range of the auxiliary wireless communication unit. 17. A medical system comprising the patient display device according to any one of the preceding embodiments and an implantable medical device. 18. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to be fixated to a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portions, and a main portion, wherein: the first and second members are connected to the main portion, and wherein at least the second member is pivotally connected to the main portion, such that the second member can be displaced in the first direction relative to the first member by the second member pivoting in relation to the main portion, and the operation device comprises at least one eccentric rotatable engagement member configured to engage at least the second member such that the eccentric rotation of the engagement member causes the second member to pivot in relation to the main portion for displacing the second member relative to the first member for stretching the stomach wall between the first and second portions. 19. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for activelystretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to be fixated to a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to be fixated to a second portion of the stomach wall, a hydraulic operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portions, and a main portion, wherein: the first and second members are connected to the main portion, and wherein at least the second member is configured to bend or pivot in relation to the main portion, such that the second member can be displaced in the first direction relative to the first member by the second member bending or pivoting in relation to the main portion, at least the second member comprises a fluid chamber at least partially enclosed by a flexible wall portion, and the flexible wall portion causes the second member to bend orpivot when hydraulic fluid is moved to or from the fluid chamber for stretching the stomach wall between the first and second portions. 20. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to be fixated to a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction, for stretching the stomach wall between the first and second portions, and a main portion, wherein: the first and second members are connected to the main portion,at least the second member is configured to bend or pivot in relation to the main portion, such that the second member can be displaced in a direction away from the first member by the second member bending or pivoting in relation to the main portion,the operation device comprises a first flexible cable for pulling on the second member for displacing the second member in the direction away from the first member, and the first flexible cable is fixated to the second member at the distal half of thereof. 21. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to engage a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to engage a second portion of the stomach wall, a main portion, wherein the first and second members are connected to the main portion,an operation device for operating at least the second member to displace the second member in a direction away from the first member, for stretching the stomach wall between the first and second portions, wherein a portion of the operation device is placed in a remote unit configured to be placed at a remote location in the body of the patient, and a force transferring element configured to transfer force hydraulically or mechanically from the remote unit to the main portion, for operating the second member. 22. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portion, an acoustic sensor configured to sense at least one sound related to the patient swallowing, and a controller configured to: receive a signal from the acoustic sensor, and control the operation device on the basis of the signal received from the acoustic sensor. 23. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portion, a sensor configured to: sense at least one parameter related to the patient swallowing, and be fixated to a structure of the body comprising bone, and a controller configured to: receive a signal from the sensor, and control the operation device on the basis of the signal received from the sensor. 24. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising: a first stomach engager configured to engage a first portion of the stomach wall, and a second stomach engager portion configured to engage a second portion of the stomach wall, a second member comprising: a first stomach engager configured to engage a third portion of the stomach wall, and a second stomach engager portion configured to engage a fourth portion of the stomach wall, a main portion, wherein the first and second members are operably connected to the main portion, an operation device comprising an actuator, wherein the operation device is configured to displace the actuator, such that the actuator is configured to: in a first state, operate the first member for displacing the first stomach engager of the first member in relation to the second stomach engager of the first member, for stretching the stomach wall, and in a second state, operate the second member for displacing the first stomach engager of the second member in relation to the second stomach engager of the second member, for stretching the stomach wall. 25. The medical system according to embodiment 17, wherein the implantable medical device comprises an implantable operation device for operating a body engaging portion of a medical implant, the implantable operation device comprising: an electrical machine for transforming electrical energy to mechanical force, a flexible shaft for transferring the mechanical force to a body engaging portion, and a pre-tensioning device for creating a pre-tension in the flexible shaft. 26. The medical system according to embodiment 17, wherein the implantable medical device comprises an implantable operation device for operating a body engaging portion of a medical implant, the implantable operation device comprising: an electrical machine for transforming electrical energy to mechanical force, a transmission for transforming a mechanical force created by electrical transforming device from a force having a first speed and a first strength to a force having a second lower speed and a second higher strength, wherein the transmission comprises: a first and second pulley, a flexible element configured to be placed around the first and second pulley, wherein the flexible element is configured to be pulled by the force having the first speed and first strength, causing the firstand second pulley to displace in relation to each other with the force having the second lower speed and the second higher strength, thereby creating the transmission. 27. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a second member configured to be fixated to the stomach wall of the patient and comprising a closed curve, a first member configured to be fixated to the stomach wall of the patient within the footprint of the second member, wherein the first member is operably connected to the second member such that the first member can be displaced: relative to the second member, and within the footprint of the second member, for stretching a portion of the stomach wall of the patient between the second and first member. 28. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a second member configured to be fixated to the stomach wall of the patient, and an operable first member connected to the second member and configured to be fixated to the stomach wall at least partially within the footprint of the second member, wherein the first member is configured to be operated to deform such that a first portion of the first member is moved away from a first portion of the second member, for stretching a portion of the stomach wall between the first portion of the first member and the first portion of the second member. 29. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: an operable first member configured to be fixated to a first portion of the stomach wall, and a second member configured to be fixated to a second portion of the stomach wall, and an operation device, characterized in that the operation device is configured to pull at least a portion of the first member in a first direction away from at least one portion of the second member, for stretching a portion of the stomach wall between the first portion of the stomach wall and the second portion of the stomach wall for creating the sensation of satiety. 30. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: an operable first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, a mechanical operation device configured to move at least a portion of the first member in a first direction away from at least one portion of the second member, for stretching a portion of the stomach wall between the first portion of the stomach wall and the second portion of the stomach wall, for creating the sensation of satiety, wherein a portion of the operation device is placed in a remote unit configured to be placed at a remote location in the body of the patient, and a force transferring element configured to transfer mechanical force from the remote unit to the first member, for operating the first member. 31. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: an operable first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, an operation device configured to: move at least a portion of the first member in a first direction relative to at least one portion of the second member, for stretching a portion of the stomach wall between the first and second members, and at least one of: move at least a portion of the operable first member in a second direction relative to at least one portion of the second member, and move an operable third member in a third direction for stretching a portion of the stomach wall between the third and second members, and a mechanical switching device configured to switch the operation device:from operating the first member to move in the first direction to operating the first member to move in the second direction, or from operating the first member to move in the first direction to operating the third member to move in the third direction. 32. The medical system according to embodiment 17, wherein the implantable medical device comprises an implantable operation device for operating a body engaging portion of a medical implant, the implantable operation device comprising: an electrical machine for transforming electrical energy to mechanical force, a transmission for transforming rotational force created by the electrical machine to a linear force, a shaft for transferring rotational and linear force from the operation device to the body engaging portion of the medical implant,a switch placed between the electrical machine and the shaft, wherein the switch is configured to switch the force exerted on shaft such that: in a first state, a rotational force is exerted on the shaft, and in a second, a linear force is exerted in the shaft.33. The medical system according to embodiment 17, wherein the implantable medical device comprises an apparatus for treating obesity of a patient having a stomach with a food cavity, the apparatus comprising: - a volume filling device adapted to be at least substantially invaginated by a stomach wall portion of the patient with the outer surface of the volume filling device resting against the stomach wall, such that the volume of the food cavity is reduced in size by a volume substantially exceeding the volume of the volume filling device, characterized by - at least one adjustable stretching device adapted to be at least substantially invaginated by a stomach wall portion of the patient withthe outer surface of the stretching device resting against the stomach wall and adapted to stretch a portion of stomach wall, and - a fluid connection device interconnecting the volume filling device and the stretching device.34. The medical system according to embodiment 17, wherein the implantable medical device comprises a device for treating obesity of a patient, the device comprising: at least one operable stretching device (10; 110) implantable in the patient and adapted to stretch a portion of the patient's stomach wall (12), and an implantable control unit (42) for automatically controlling the operable stretching device, when the control unit and stretching device are implanted, to stretch the stomach wall portion in connection with the patient eating such that satiety is created, characterized in that the stretching device comprises a first and a second engaging part (10''; 110a; 110b; 210a; 210b), wherein: the first part is adapted to be engaged to a first area of the stomach wall, and the second part is adapted to be engaged to a second area of the stomach wall, and wherein the stretching device is adapted to stretch a portion of the stomach wall between the first area and the second area. 35. The medical system according to embodiment 17, wherein the implantable medical device comprises an obesity treatment device comprising: - at least one operable stretching device (10; 10"; 110a; 110b; 410b; 50; 810) implantable in a patient and adapted to stretch a portion of the patient's stomach wall (12) and - an implantable operation device (90; 42; 54; 40; 217; 218; 452) for operating the stretching device, when implanted, to stretch the stomach wall portion such that satiety is created, characterized in that the operable stretching device is adapted to be placed against the outside of the stomach wall. 36. The medical system according to embodiment 17, wherein the implantable medical device comprises a device for treating obesity of a patient, the device comprising: at least one operable stretching device implantable in the patient and adapted to stretch a portion of the patient’s stomach wall, and an implantable control unit for controlling the operable stretching device, when the control unit and the stretching device are implanted, to stretch the stomach wall portion in connection with the patient eating such that satiety is created, characterized in that the stretching device comprises a first engaging part and a second engaging part, wherein: the first engaging part is adapted to be engaged to a first area of the stomach wall, and the second engaging part is adapted to be engaged to a second area of the stomach wall, and wherein the stretching device is adapted to stretch a portion of the stomach wall between the first area and the second area. 37. The medical system according to embodiment 17, wherein the implantable medical device comprises a device for treating obesity of a patient, the device comprising: a. at least one operable stretching device implantable in the patient operating via mechanical, pneumatic, and/or hydraulic action to stretch a portion of the patient’s stomach wall, and b. an implantable control unit for automatically controlling the operable stretching device, when the control unit and stretching device are implanted, to stretch the stomach wall portion in connection with the patient eating such that satiety is created.ASPECT 387SE - eHealth_General_Encryption_End-to-End1. A communication system for enabling communication between a patient display device, a patient external device, a server and an implantable medical device, the communication system comprising: a server, a patient external device, andan implantable medical device, wherein a patient display device is adapted to co-operate with at least one of the patient external device and the server and further adapted to use: a wireless communication unit for wirelessly communicating with at least one of the patient external device and the server, a display, and an input device for receiving input from the user, wherein the patient external device comprises a wireless communication unit configured for wireless transmission of control commands tothe implantable medical device and configured for wireless communication with at least one of the patient display device and the server, wherein the server comprises a wireless communication unit configured for wireless communication with at least one of the patient display device and the patient external device, wherein the implantable medical device comprises a wireless communication unit configured for wireless communication with the patient external device, wherein the implantable medical device comprises an encryption unit and is configured to: encrypt data destined for the server, transmit the data to the server via at least one of the patient external device and a second external device or patient EID, wherein at least one of the patient external device and the patient EID, wherein the implantable medical device comprises an encryption unit and is configured to: encrypt data destined for the patient display device, transmit the data to the patient display device via the patient external device, wherein the patient external device acts as a router transferring the data without full decryption, or wherein the server comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient external device or patient EID, wherein the patient external device or patient EID acts as a router transferring the data authenticated and with or without full decryption, or wherein the server comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient display device and the patient external device, wherein the patient display device and the patient external device acts as a router transferring the data with or without full decryption, or wherein the patient display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient external device, wherein the patient external device acts as a router transferring the data with or without full decryption, or wherein the patient display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medicaldevice, transmit the data to the implantable medical device via the server and the patient external device or patient EID, wherein the server and the patient external device or the patient EID acts as a router transferring the data with or without full decryption,wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall.2. A communication system for enabling communication between a patient display device, a patient external device, a server and animplantable medical device, the communication system comprising: a server, a patient external device, and an implantable medical device, wherein a patient display device is adapted to co-operate with at least one of the patient external device and the server and further adapted to use: a wireless communication unit for wirelessly communicating with at least one of the patient external device and the server, a display, and an input device for receiving input from the user, wherein the patient external device comprises a wireless communication unit configured for wireless transmission of control commands to the implantable medical device and configured for wireless communication with at least one of the patient display device and the server, wherein the server comprises a wireless communication unit configured for wireless communication with at least one of the patient display device and the patient external device,wherein the implantable medical device comprises a wireless communication unit configured for wireless communication with the patient external device, wherein the implantable medical device comprises an encryption unit and is configured to: encrypt data destined for the server, transmit the data to the server via at least one of the patient external device and a second external device or patient EID, wherein at least one of the patient external device and the patient EID, wherein the implantable medical device comprises an encryption unit and is configured to: encrypt data destined for the patient display device, transmit the data to the patient display device via the patient external device, wherein the patient external device acts as a router transferring the data without full decryption, or wherein the server comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient external device or patient EID, wherein the patient external device or patient EID acts as a router transferring the data authenticated and with or without full decryption, or wherein the server comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmitthe data to the implantable medical device via the patient display device and the patient external device, wherein the patient display device and the patient external device acts as a router transferring the data with or without full decryption, or wherein the patient display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient external device, wherein the patient external device acts as a router transferring the data with or without full decryption, or wherein the patient display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medicaldevice, transmit the data to the implantable medical device via the server and the patient external device or patient EID, wherein the server and the patient external device or the patient EID acts as a router transferring the data with or without full decryption, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.3. A communication system for enabling communication between a patient display device, a patient external device, a server and an implantable medical device, the communication system comprising: a server, a patient external device, and an implantable medical device, wherein a patient display device is adapted to co-operate with at least one of the patient external device and the server and further adapted to use: a wireless communication unit for wirelessly communicating with at least one of the patient external device and the server, a display, and an input device for receiving input from the user, wherein the patient external device comprises a wireless communication unit configured for wireless transmission of control commands to the implantable medical device and configured for wireless communication with at least one of the patient display device and the server, wherein the server comprises a wireless communication unit configured for wireless communication with at least one of the patient display device and the patient external device, wherein the implantable medical device comprises a wireless communication unit configured for wireless communication with the patient external device, wherein the implantable medical device comprises an encryption unit and is configured to: encrypt data destined for the server, transmit the data to the server via at least one of the patient external device and a second external device or patient EID, wherein at least one of the patient external device and the patient EID, wherein the implantable medical device comprises an encryption unit and is configured to: encrypt data destined for the patient display device, transmit the data to the patient display device via the patient external device, wherein the patient external device acts as a router transferring the data without full decryption, or wherein the server comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient external device or patient EID, wherein the patient external device or patient EID acts as a router transferring the data authenticated and with or without full decryption, or wherein the server comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmitthe data to the implantable medical device via the patient display device and the patient external device, wherein the patient display device and the patient external device acts as a router transferring the data with or without full decryption, or wherein the patient display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient external device, wherein the patient external device acts as a router transferring the data with or without full decryption, or wherein the patient display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the server and the patient external device or patient EID, wherein the server and the patient external device or the patient EID acts as a router transferring the data with or without full decryption,wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.4. A communication system for enabling communication between a patient display device, a patient external device, a server and an implantable medical device, the communication system comprising: a server, a patient external device, and an implantable medical device, wherein a patient display device is adapted to co-operate with at least one of the patient external device and the server and further adapted to use: a wireless communication unit for wirelessly communicating with at least one of the patient external device and the server, a display, and an input device for receiving input from the user, wherein the patient external device comprises a wireless communication unit configured for wireless transmission of control commands to the implantable medical device and configured for wireless communication with at least one of the patient display device and the server, wherein the server comprises a wireless communication unit configured for wireless communication with at least one of the patient display device and the patient external device,wherein the implantable medical device comprises a wireless communication unit configured for wireless communication with the patient external device, wherein the implantable medical device comprises an encryption unit and is configured to: encrypt data destined for the server, transmitthe data to the server via at least one of the patient external device and a second external device or patient EID, wherein at least one of the patient external device and the patient EID, wherein the implantable medical device comprises an encryption unit and is configured to: encrypt data destined for the patient display device, transmit the data to the patient display device via the patient external device, wherein the patient external device acts as a router transferring the data without full decryption, or wherein the server comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient external device or patient EID, wherein the patient external device or patient EID acts as a router transferring the data authenticated and with or without full decryption, or wherein the server comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient display device and the patient external device, wherein the patient display device and the patient external device acts as a router transferring the data with or without full decryption, or wherein the patient display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient external device, wherein the patient external device acts as a router transferring the data with or without full decryption, or wherein the patient display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the server and the patient external device or patient EID, wherein the serverand the patient external device or the patient EID acts as a router transferring the data with or without full decryption, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina.5. The communication system according to any one of embodiments 1 – 4, wherein the patient display device is configured to wirelessly receive an implant control interface from the patient external device to be displayed on the display.6. The communication system according to any one of embodiments 1 – 5, wherein at least two of: the wireless communication unit of the server, the wireless communication unit of the patient display device, the wireless communication unit of the patient external device, and the wireless communication unit of the implantable medical device, is configured for wireless communication using a standard network protocol.7. The communication system according to any one of embodiments 1 – 5, wherein at least two of: the wireless communication unit of the server, the wireless communication unit of the patient display device, the wireless communication unit of the patient external device, and the wireless communication unit of the implantable medical device, is configured for wireless communication using a proprietary network protocol.8. The communication system according to any one of embodiments 1 – 7, wherein the wireless communication unit of the patient external device is configured to:use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the server, or use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the patient display device.9. The communication system according to any one of embodiments 1 – 8, wherein the wireless communication unit of the patient external device is configured to: use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the server, or use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the patient display device.10. The communication system according to any one of embodiments 1 – 9, wherein the wireless communication unit of the patient display device is configured to use a first network protocol for communication with the patient external device and use a second networkprotocol for communication with the server.11. The communication system according to any one of embodiments 1 – 10, wherein the wireless communication unit of the patientdisplay device is configured to use a first frequency band for communication with the patient external device and use a second frequency band for communication with the server.12. The communication system according to any one of embodiments 1 – 11, wherein the wireless communication unit of the server is configured to use a first network protocol for communication with the patient external device and use a second network protocol for communication with the patient display device.13. The communication system according to any one of embodiments 1 – 12, wherein the wireless communication unit of the server is configured to use a first frequency band for communication with the patient external device and use a second frequency band for communication with the patient display device.14. The communication system according to any one of embodiments 1 – 14, wherein the wireless communication unit of at least one of the server, the patient display device, the patient external device, and the implantable medical device comprises a Bluetooth transceiver.15. The communication system according to any one of embodiments 1 – 14, wherein the wireless communication unit of at least one of the server, the patient display device, the patient external device, and the implantable medical device comprises a UWB transceiver.16. The communication system according to embodiment 6, wherein the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol. 17. A medical system comprising the communication system according to any one of the preceding embodiments and an implantable medical device.18. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to be fixated to a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portions, and a main portion, wherein: the first and second members are connected to the main portion, and wherein at least the second member is pivotally connected to the main portion, such that the second member can be displaced in the first direction relative to the first member by the second member pivoting in relation to the main portion, and the operation device comprises at least one eccentric rotatableengagement member configured to engage at least the second member such that the eccentric rotation of the engagement member causes the second member to pivot in relation to the main portion for displacing the second member relative to the first member for stretching the stomach wall between the first and second portions. 19. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to be fixated to a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to be fixated to a second portion of the stomach wall, a hydraulic operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portions, and a main portion, wherein: the first and second members are connected to the main portion, and wherein at least the second member is configured to bend or pivot in relation to the main portion, such that the second member can be displaced in the first direction relative to the first member by the second member bending or pivoting in relation to the main portion, at least the second member comprises a fluid chamber at least partially enclosed by a flexible wall portion, and the flexible wall portion causes the second member to bend orpivot when hydraulic fluid is moved to or from the fluid chamber for stretching the stomach wall between the first and second portions. 20. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to be fixated to a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction, for stretching the stomach wall between the first and second portions, and a main portion, wherein: the first and second members are connected to the main portion, at least the second member is configured to bend or pivot in relation to the main portion, such that the second member can be displaced in a direction away from the first member by the second member bending or pivoting in relation to the main portion, the operation device comprises a first flexible cable for pulling on the second member for displacing the second member in the direction away from the first member, and the first flexible cable is fixated to the second member at the distal half of thereof. 21. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to engage a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to engage a second portion of the stomach wall, a main portion, wherein the first and second members are connected to the main portion,an operation device for operating at least the second member to displace the second member in a direction away from the first member,for stretching the stomach wall between the first and second portions, wherein a portion of the operation device is placed in a remote unit configured to be placed at a remote location in the body of the patient, and a force transferring element configured to transfer force hydraulically or mechanically from the remote unit to the main portion, for operating the second member. 22. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portion, an acoustic sensor configured to sense at least one sound related to the patient swallowing, and a controller configured to: receive a signal from the acoustic sensor, and control the operation device on the basis of the signal received from the acoustic sensor. 23. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portion, a sensor configured to: sense at least one parameter related to the patient swallowing, and be fixated to a structure of the body comprising bone, and a controller configured to: receive a signal from the sensor, and control the operation device on the basis of the signal received from the sensor. 24. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising: a first stomach engager configured to engage a first portion of the stomach wall, and a second stomach engager portion configured to engage a second portion of the stomach wall, a second member comprising: a first stomach engager configured to engage a third portion of the stomach wall, and a second stomach engager portion configured to engage a fourth portion of the stomach wall, a main portion, wherein the first and second members are operably connected to the main portion, an operation device comprising an actuator, wherein the operation device is configured to displace the actuator, such that the actuator is configured to: in a first state, operate the first member for displacing the first stomach engager of the first member in relation to the second stomach engager of the first member, for stretching the stomach wall, and in a second state, operate the second member for displacing the first stomach engager of the second member in relation to the second stomach engager of the second member, for stretching the stomach wall. 25. The medical system according to embodiment 17, wherein the implantable medical device comprises an implantable operation device for operating a body engaging portion of a medical implant, the implantable operation device comprising: an electrical machine for transforming electrical energy to mechanical force, a flexible shaft for transferring the mechanical force to a body engaging portion, and a pre-tensioning device for creating a pre-tension in the flexible shaft. 26. The medical system according to embodiment 17, wherein the implantable medical device comprises an implantable operation device for operating a body engaging portion of a medical implant, the implantable operation device comprising: an electrical machine for transforming electrical energy to mechanical force, a transmission for transforming a mechanical force created by electrical transforming device from a force having a first speed and a first strength to a force having a second lower speed and a second higher strength, wherein the transmission comprises: a first and second pulley, a flexible element configured to be placed around the first and second pulley, wherein the flexible element is configured to be pulled by the force having the first speed and first strength, causing the first and second pulley to displace in relation to each other with the force having the second lower speed and the second higher strength, thereby creating the transmission. 27. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a second member configured to be fixated to the stomach wall of the patient and comprising a closed curve, a first member configured to be fixated to the stomach wall of the patient within the footprint of the second member, wherein the first member is operably connected to the second member such that the first member can be displaced: relative to the second member, and within the footprint of the second member, for stretching a portion of the stomach wall of the patient between the second and first member. 28. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a second member configured to be fixated to the stomach wall of the patient, and an operable first member connected to the second member and configured to be fixated to the stomach wall at least partially within the footprint of the second member, wherein the first member is configured to be operated to deform such that a first portion of the first member is moved away from a first portion of the second member, for stretching a portion of the stomach wall between the first portion of the first member and the first portion of the second member. 29. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: an operable first member configured to be fixated to a first portion of the stomach wall, and a second member configured to be fixated to a second portion of the stomach wall, and an operation device, characterized in that the operation device is configured to pull at least a portion of the first member in a first directionaway from at least one portion of the second member, for stretching a portion of the stomach wall between the first portion of the stomach wall and the second portion of the stomach wall for creating the sensation of satiety.30. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising:an operable first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, a mechanical operation device configured to move at least a portion of the first member in a first direction away from at least one portionof the second member, for stretching a portion of the stomach wall between the first portion of the stomach wall and the second portion ofthe stomach wall, for creating the sensation of satiety, wherein a portion of the operation device is placed in a remote unit configured to be placed at a remote location in the body of the patient, and a force transferring element configured to transfer mechanical force from the remote unit to the first member, for operating the first member. 31. The medical system according to embodiment 17, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: an operable first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, an operation device configured to: move at least a portion of the first member in a first direction relative to at least one portion of the second member, for stretching a portion of the stomach wall between the first and second members, and at least one of: move at least a portion of the operable first member in asecond direction relative to at least one portion of the second member, and move an operable third member in a third direction for stretching a portion of the stomach wall between the third and second members, and a mechanical switching device configured to switch the operation device: from operating the first member to move in the first direction to operating the first member to move in the second direction, or from operating the first member to move in the first direction to operating the third member to move in the third direction. 32. The medical system according to embodiment 17, wherein the implantable medical device comprises an implantable operation device for operating a body engaging portion of a medical implant, the implantable operation device comprising: an electrical machine for transforming electrical energy to mechanical force, a transmission for transforming rotational force created by the electrical machine to a linear force, a shaft for transferring rotational and linear force from the operation device to the body engaging portion of the medical implant,a switch placed between the electrical machine and the shaft, wherein the switch is configured to switch the force exerted on shaft such that: in a first state, a rotational force is exerted on the shaft, and in a second, a linear force is exerted in the shaft.33. The medical system according to embodiment 17, wherein the implantable medical device comprises an apparatus for treating obesity of a patient having a stomach with a food cavity, the apparatus comprising: - a volume filling device adapted to be at least substantially invaginated by a stomach wall portion of the patient with the outer surface of the volume filling device resting against the stomach wall, such that the volume of the food cavity is reduced in size by a volume substantially exceeding the volume of the volume filling device, characterized by - at least one adjustable stretching device adapted to be at least substantially invaginated by a stomach wall portion of the patient with the outer surface of the stretching device resting against the stomach wall and adapted to stretch a portion of stomach wall, and - a fluid connection device interconnecting the volume filling device and the stretching device. 34. The medical system according to embodiment 17, wherein the implantable medical device comprises a device for treating obesity of a patient, the device comprising: at least one operable stretching device (10; 110) implantable in the patient and adapted to stretch a portion of the patient's stomach wall (12), and an implantable control unit (42) for automatically controlling the operable stretching device, when the control unit and stretching device are implanted, to stretch the stomach wall portion in connection with the patient eating such that satiety is created, characterized in that the stretching device comprises a first and a second engaging part (10''; 110a; 110b; 210a; 210b), wherein: the first part is adapted to be engaged to a first area of the stomach wall, and the second part is adapted to be engaged to a second area of the stomach wall, and wherein the stretching device is adapted to stretch a portion of the stomach wall between the first area and the second area.35. The medical system according to embodiment 17, wherein the implantable medical device comprises an obesity treatment device comprising: - at least one operable stretching device (10; 10"; 110a; 110b; 410b; 50; 810) implantable in a patient and adapted to stretch a portion of the patient's stomach wall (12) and - an implantable operation device (90; 42; 54; 40; 217; 218; 452) for operating the stretching device, when implanted, to stretch the stomach wall portion such that satiety is created, characterized in that the operable stretching device is adapted to be placed against the outside of the stomach wall.36. The medical system according to embodiment 17, wherein the implantable medical device comprises a device for treating obesity of a patient, the device comprising: at least one operable stretching device implantable in the patient and adapted to stretch a portion of the patient’s stomach wall, and an implantable control unit for controlling the operable stretching device, when the control unit and the stretching device are implanted, to stretch the stomach wall portion in connection with the patient eating such that satiety is created, characterized in that the stretching device comprises a first engaging part and a second engaging part, wherein: the first engaging part is adapted to be engaged to a first area of the stomach wall, and the second engaging part is adapted to be engaged to a second area of the stomach wall, and wherein the stretching device is adapted to stretch a portion of the stomach wall between the first area and the second area. 37. The medical system according to embodiment 17, wherein the implantable medical device comprises a device for treating obesity of a patient, the device comprising: a. at least one operable stretching device implantable in the patient operating via mechanical, pneumatic, and/or hydraulic action to stretch a portion of the patient’s stomach wall, and b. an implantable control unit for automatically controlling the operable stretching device, when the control unit and stretching device are implanted, to stretch the stomach wall portion in connection with the patient eating such that satiety is created.ASPECT 387B - eHealth_General_Encryption_End-to-End 1. A communication system for communication of data to or from an implantable medical device, the communication system comprising: an implantable medical device, a server, a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, a patient display device adapted to communicate with at least one of the patient external device and the server, wherein the implantable medical device comprises an encryption unit and is configured to: encrypt data destined for the server, transmit the data to the server via at least one of the patient external device, wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 2. A communication system for communication of data to or from an implantable medical device, the communication system comprising: an implantable medical device, a server, a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, a patient display device adapted to communicate with at least one of the patient external device and the server, wherein the implantable medical device comprises an encryption unit and is configured to: encrypt data destined for the server, transmit the data to the server via at least one of the patient external device, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 3. A communication system for communication of data to or from an implantable medical device, the communication system comprising: an implantable medical device, a server, a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, a patient display device adapted to communicate with at least one of the patient external device and the server, wherein the implantable medical device comprises an encryption unit and is configured to: encrypt data destined for the server, transmit the data to the server via at least one of the patient external device, wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. A communication system for communication of data to or from an implantable medical device, the communication system comprising: an implantable medical device, a server, a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, a patient display device adapted to communicate with at least one of the patient external device and the server, wherein the implantable medical device comprises an encryption unit and is configured to: encrypt data destined for the server, transmit the data to the server via at least one of the patient external device, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. A communication system for enabling communication to or from an implantable medical device, the communication system comprising: a server, a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, an implantable medical device, a patient display device adapted to communicate with at least one of the patient external device and the server, wherein the implantable medical device comprises an encryption unit and is configured to: encrypt data destined for the patient display device, transmit the data to the patient display device via the patient external device, wherein the patient external device acts as a router transferring the data without full decryption,wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 6. A communication system for enabling communication to or from an implantable medical device, the communication system comprising: a server,a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, an implantable medical device, a patient display device adapted to communicate with at least one of the patient external device and the server, wherein the implantable medical device comprises an encryption unit and is configured to: encrypt data destined for the patient display device, transmit the data to the patient display device via the patient external device, wherein the patient external device acts as a router transferring the data without full decryption, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 7. A communication system for enabling communication to or from an implantable medical device, the communication system comprising: a server, a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, an implantable medical device, a patient display device adapted to communicate with at least one of the patient external device and the server, wherein the implantable medical device comprises an encryption unit and is configured to: encrypt data destined for the patient display device, transmit the data to the patient display device via the patient external device, wherein the patient external device acts as a router transferring the data without full decryption,wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 8. A communication system for enabling communication to or from an implantable medical device, the communication system comprising: a server, a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, an implantable medical device, a patient display device adapted to communicate with at least one of the patient external device and the server, wherein the implantable medical device comprises an encryption unit and is configured to: encrypt data destined for the patient display device, transmit the data to the patient display device via the patient external device, wherein the patient external device acts as a router transferring the data without full decryption, 9. A communication system for enabling communication to or from an implantable medical implant, the communication system comprising: a server, a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, an implantable medical device, a patient display device adapted to communicate with at least one of the patient external device and the server, wherein the server comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient external device, wherein the patient external device acts as a router transferring the data without full decryption, wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 10. A communication system for enabling communication to or from an implantable medical implant, the communication system comprising: a server, a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, an implantable medical device, a patient display device adapted to communicate with at least one of the patient external device and the server, wherein the server comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient external device, wherein the patient external device acts as a router transferring the data without full decryption, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 11. A communication system for enabling communication to or from an implantable medical implant, the communication system comprising: a server, a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, an implantable medical device, a patient display device adapted to communicate with at least one of the patient external device and the server, wherein the server comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient external device, wherein the patient external device acts as a router transferring the data without full decryption, wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 12. A communication system for enabling communication to or from an implantable medical implant, the communication system comprising: a server, a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, an implantable medical device,a patient display device adapted to communicate with at least one of the patient external device and the server, wherein the server comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient external device, wherein the patient external device acts as a router transferring the data without full decryption, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 13. A communication system for enabling communication to or from a medical implant, the communication system comprising: a server, a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, an implantable medical device, a patient display device adapted to communicate with at least one of the patient external device and the server, wherein the patient display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device,transmit the data to the implantable medical device via the patient external device, wherein the patient external device acts as a router transferring the data with or without full decryption,wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 14. A communication system for enabling communication to or from a medical implant, the communication system comprising: a server, a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, an implantable medical device, a patient display device adapted to communicate with at least one of the patient external device and the server, wherein the patient display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device,transmit the data to the implantable medical device via the patient external device, wherein the patient external device acts as a router transferring the data with or without full decryption, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.15. A communication system for enabling communication to or from a medical implant, the communication system comprising: a server, a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, an implantable medical device, a patient display device adapted to communicate with at least one of the patient external device and the server, wherein the patient display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device,transmit the data to the implantable medical device via the patient external device, wherein the patient external device acts as a router transferring the data with or without full decryption, wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 16. A communication system for enabling communication to or from a medical implant, the communication system comprising: a server, a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, an implantable medical device, a patient display device adapted to communicate with at least one of the patient external device and the server, wherein the patient display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the patient external device, wherein the patient external device acts as a router transferring the data with or without full decryption, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 16. A communication system for enabling communication to or from a medical implant, the communication system comprising: a server, a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, an implantable medical device, a patient display device adapted to communicate with at least one of the patient external device and the server, wherein the patient display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the server and/or the patient external device, wherein the server and/or the patient external device acts as a router transferring the data with or without full decryption, wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 17. A communication system for enabling communication to or from a medical implant, the communication system comprising: a server, a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, an implantable medical device, a patient display device adapted to communicate with at least one of the patient external device and the server,wherein the patient display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the server and/or the patient external device, wherein the server and/or the patient external device acts as a router transferring the data with or without full decryption, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 19. A communication system for enabling communication to or from a medical implant, the communication system comprising: a server, a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, an implantable medical device, a patient display device adapted to communicate with at least one of the patient external device and the server, wherein the patient display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the server and/or the patient external device, wherein the server and/or the patient external device acts as a router transferring the data with or without full decryption, wherein the implantable medical device comprises an implantable vibration device comprisinga vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.20. A communication system for enabling communication to or from a medical implant, the communication system comprising: a server, a patient external device comprising: a first wireless communication unit configured for wireless transmission of control commands or data to or from the implantable medical device, and a second wireless communication unit for wireless communication with the server, an implantable medical device, a patient display device adapted to communicate with at least one of the patient external device and the server, wherein the patient display device comprises an encryption unit and is configured to: encrypt data destined for the implantable medical device, transmit the data to the implantable medical device via the server and/or the patient external device, wherein the server and/or the patient external device acts as a router transferring the data with or without full decryption, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 21. The communication system according to any one of the preceding embodiments, further comprising: a display connected to the patient display device, and an input device for receiving input from the user, the input device being connected to the patient display device,wherein the patient display device is configured to receive an implant control interface from the patient external device to be displayed on the display, and wherein the patient display device is configured to transmit any control input received form the input device to the patient external device. 22. The communication system according to any one of the preceding embodiments, wherein at least two of: the server, the patient display device, the patient external device, and the implantable medical device, are configured for wireless communication using a standard network protocol. 23. The communication system according to any one of the preceding embodiments, wherein at least two of: the server, the patient display device, the patient external device, and the implantable medical device, are configured for wireless communication using a proprietary network protocol. 24. The communication system according to any one of the preceding embodiments, wherein the patient external device is configured to: use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the server, or use a first network protocol for communication with the implantable medical device and use a second network protocol for communication with the patient display device. 25. The communication system according to any one of the preceding embodiments, wherein the patient external device is configured to: use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the server, or use a first frequency band for communication with the implantable medical device and use a second frequency band for communication with the patient display device. 26. The communication system according to any one of the preceding embodiments, wherein the patient display device is configured to use a first network protocol for communication with the patient external device and use a second network protocol for communication with the server. 27. The communication system according to any one of the preceding embodiments, wherein the patient display device is configured to use a first frequency band for communication with the patient external device and use a second frequency band for communication with the server. 28. The communication system according to any one of the preceding embodiments, wherein at least one of the patient display device, thepatient external device, and the implantable medical device comprises a Bluetooth transceiver. 29. The communication system according to any one of the preceding embodiments, wherein at least one the patient display device, the patient external device, and the implantable medical device comprises a UWB transceiver. 30. The communication system according to embodiment 19, wherein the standard network protocol is one from the list of: Radio Frequency type protocol, RFID type protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol.31. The communication system according to any one of the preceding embodiments, wherein the patient external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wireless communication with the server, and wherein the second wireless transceiver has a longer effective range than the first wireless transceiver. 32. The communication system according to any one of the preceding embodiments, wherein the patient external device comprises a first wireless transceiver for wireless communication with the implantable medical device, and a second wireless transceiver for wirelesscommunication with the patient display device, and wherein the second wireless transceiver has a longer effective range than the first wireless transceiver. 33. The communication system according to any one of the preceding embodiments, wherein the patient display device comprises a firstwireless transceiver for wireless communication with the patient external device, and a second wireless transceiver for wireless communication with the server, and wherein the second wireless transceiver has a longer effective range than the first wireless transceiver.34. The communication system according to any one of embodiment 31 – 33, wherein the second wireless transceiver has an effective range being one of: 2 times, 4 times, 8 times 20 times, 50 times or 100 times longer than the first wireless transceiver.35. The communication system according to any one of embodiments 31 – 33, wherein the second wireless transceiver is configured to be disabled while the first wireless transceiver is enabled. 36. The communication system according to any one of the preceding embodiments, wherein the patient display device is configured to allow the transfer of data between the patient display device and the patient external device based on that a distance between the patient display device and the patient external device is less than a predetermined threshold value. 37. The communication system according to any one of the preceding embodiments, wherein the patient external device is configured to allow the transfer of data between the patient display device and the patient external device based on that a distance between the patient display device and the patient external device is less than a predetermined threshold value. 38. The communication system according to any one of the preceding embodiments, wherein the patient external device is configured to allow the transfer of data between the patient external device and the implantable medical device based on that a distance between the patient display device and the patient external device is less than a predetermined threshold value.39. The communication system according to any one of the preceding embodiments, wherein the patient display device is a wearable patient display device or a handset. 40. The communication system according to any one of the preceding embodiments, wherein the implantable medical device is configured to transmit encrypted data related to at least one of: a battery status, a temperature, a time, or an error.41. A server for use in the communication system according to any one of embodiments 1 – 40.42. A patient display device for use in the communication system according to any one of embodiments 1 – 40.43. A patient external device for use in the communication system according to any one of embodiments 1 – 40.44. An implantable medical device for use in the communication system according to any one of embodiments 1 – 40. 45. The communication system according to any one of the preceding embodiments, wherein at least one of: the server comprises or is adapted to receive a health care provider private key for encrypting and/or decrypting data, the patient display device comprises or is adapted to receive a patient display private key for encrypting and/or decrypting data, the patient external device comprises or is adapted to receive a patient private key for encrypting and/or decrypting data, and the implantable medical device comprises a medical device private key for encrypting or decrypting data. 46. The communication system according to embodiment 45, wherein at least one of the health care provider private key, patient display private key, the patient private key, the medical device private key comprises a hardware or a software key.ASPECT 447A - Data_packet_encryption-Implant 1. A implantable medical device configured to receive remote instructions from an external system, the implantable medical device comprising: a wireless receiver configured to receive wirelessly transmitted data packets from the external system, a computing unit configured to: verify the electronic signature, and use a checksum provided in the data packet to verify the integrity of the instructions, wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall.2. A implantable medical device configured to receive remote instructions from an external system, the implantable medical device comprising: a wireless receiver configured to receive wirelessly transmitted data packets from the external system, a computing unit configured to: verify the electronic signature, and use a checksum provided in the data packet to verify the integrity of the instructions,wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 3. A implantable medical device configured to receive remote instructions from an external system, the implantable medical device comprising: a wireless receiver configured to receive wirelessly transmitted data packets from the external system, a computing unit configured to: verify the electronic signature, and use a checksum provided in the data packet to verify the integrity of the instructions, wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. A implantable medical device configured to receive remote instructions from an external system, the implantable medical device comprising: a wireless receiver configured to receive wirelessly transmitted data packets from the external system, a computing unit configured to: verify the electronic signature, and use a checksum provided in the data packet to verify the integrity of the instructions, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina.5. The implantable medical device according to any one of embodiments 1 – 4, wherein the computing unit is configured to decrypt the data packet. 6. The implantable medical device according to any one of embodiments 1-4 and 5, wherein the computing unit is configured to use the checksum to verify that the bit stream making up the instructions is unchanged. 7. The implantable medical device according to any one of embodiments 1-4 and 5, wherein the wireless receiver is part of a wireless transceiver.8. The implantable medical device according to any one of embodiments 1 – 7, wherein the computing unit comprises a memory unit configured to store electronic signatures, and wherein the computing unit is configured to verify the electronic signature my comparing the electronic signature with the electronic signatures stored in the memory unit.9. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises a control program configured to control at least one function of the implantable medical device, and wherein computing unit is configured to alter the control program on the basis of the received instructions. 10. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises an internal computing unit configured to run a control program for controlling a function of the implantable medical device, wherein the control program comprises at least one adjustable parameter affecting the control of the implantable medical device, and wherein the method of providing remote instructions comprises providing instructions for altering the at least one parameter for affecting the control of the implantable medical device. 11. The implantable medical device according to embodiment 10, wherein the computing unit comprises a memory unit configured to storeparameter values, and wherein the method further comprises the step of verifying that the instructions for altering the at least one parameter will result in the at least one parameter being updated to a parameter value comprised in the set of stored parameter values. 12. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises a central unit, comprising at least one of a wireless receiver and a wireless transceiver, and a security module connected to the central unit,wherein the implantable medical device is configured to transfer the data packet from the central unit to the security module and wherein the security module is configured to performing at least a portion of at least one of the decryption and the signature verification. 13. The implantable medical device according to embodiment 12, wherein the security module comprises a set of rules for acceptingcommunication from the central unit, and wherein the security module is configured to verify compliance with the set of rules. 14. The implantable medical device according to embodiment 13, wherein wireless receiver or wireless transceiver is configured to be placed in an off-mode, in which no wireless communication can be received by the wireless transceiver, and wherein the set of rules comprises a rule stipulating that communication from the central unit is only accepted at the security module when the wireless transceiver is placed in the off-mode.15. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device is configured to at least one of decrypting the data packet and verifying the electronic signature using a private key of the implantable medical device.16. The implantable medical device according to any one of embodiments 13 – 15, wherein the private key is a non-extractable key.17. The implantable medical device according to any one of embodiments 13 – 16, wherein the implantable medical device is configured to perform a proof of possession operation comprising: transmitting, from the implantable medical device to the external system, a query based on a public key associated with the private key of the external system, receiving, at the implantable medical device, a response based on the possession of the private key in the external system, and verifying that the response based on the possession of the private key matches the query based on a public key. 18. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device is configured to communicate with the external system independently of time. 19. The implantable medical device according to any one of the preceding embodiments, wherein the private key is provided in the implantable medical device by the manufacturer of the implantable medical device. 20. The implantable medical device according to embodiment 19, wherein the private key is stored as hardware or software in the implantable medical device.21. The implantable medical device according to any one of the preceding embodiments 15 – 20, wherein the implantable medical device is configured to: verify a first electronic signature made using at least one of a first key and a second key, and verifying a second electronic signature made using at least one of a first key and a second key.22. The implantable medical device according to embodiment 21, wherein at least one of the first and second keys is a private key. 23. The implantable medical device according to embodiment 18, wherein the first and second keys are different. 24. The implantable medical device according to embodiment 32, wherein the first and second keys comprises at least one common element.25. The implantable medical device according to any one of embodiments 21 – 24, wherein the implantable medical device is configured to: verify a first electronic signature to allow communication from the external system to the implantable medical device, and verify a second electronic signature to allow an instruction received in the communication to alter the control program running on the implantable medical device. 26. The implantable medical device according to embodiment 25, wherein the first electronic signature is an electronic signature linked to the user of the implantable medical device and the second electronic signature is an electronic signature linked to a healthcare provider.27. The implantable medical device according to any one of embodiments 15 – 26, wherein only a portion of the private key is needed to at least one of: decrypt the data packet and verify the electronic signature.28. The implantable medical device according to any one of embodiments 15 – 26, wherein the implantable medical device trusts any external device holding the private key. 29. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device is configured to receive the data packet comprising: at least one instruction signed by a private key of the external system, and a public key including information about which root have created the public key. 30. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device is configured to accept communication from an external system based on at least one password being provided to the implantable medical device. 31. The implantable medical device according to embodiment 30, wherein the implantable medical device is configured to accept communication from an external system based on two passwords being provided to the implantable medical device. 32. The implantable medical device according to embodiment 31, wherein the implantable medical device is configured to accept communication from an external system based on one patient password and one healthcare provider passwords being provided to the implantable medical device. 33. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portion, wherein at least one of the first and second member is flexible in a second direction substantially perpendicular to the first direction for at least one of: adapting the medical device to the curvature of the stomach of the patient, and facilitating insertion of the medical device into the body of the patient. 34. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to be fixated to a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portions, and a main portion, wherein: the first and second members are connected to the main portion, and wherein at least the second member is pivotally connected to the main portion, such that the second member can be displaced in the first direction relative to the first member by the second member pivoting in relation to the main portion, and the operation device comprises at least one eccentric rotatable engagement member configured to engage at least the second member such that the eccentric rotation of the engagement member causes the second member to pivot in relation to the main portion for displacing the second member relative to the first member for stretching the stomach wall between the first and second portions. 35. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to be fixated to a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to be fixated to a second portion of the stomach wall, a hydraulic operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portions, and a main portion, wherein: the first and second members are connected to the main portion, and wherein at least the second member is configured to bend or pivot in relation to the main portion, such that the second member can bedisplaced in the first direction relative to the first member by the second member bending or pivoting in relation to the main portion, at least the second member comprises a fluid chamber at least partially enclosed by a flexible wall portion, and the flexible wall portion causes the second member to bend or pivot when hydraulic fluid is moved to or from the fluid chamber for stretching the stomach wall between the first and second portions. 36. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to be fixated to a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction, for stretching the stomach wall between the first and second portions, and a main portion, wherein: the first and second members are connected to the main portion, at least the second member is configured to bend or pivot in relation to the main portion, such that the second member can be displaced in a direction away from the first member by the second member bending or pivoting in relation to the main portion, the operation device comprises a first flexible cable for pulling on the second member for displacing the second member in the direction away from the first member, and the first flexible cable is fixated to the second member at the distal half of thereof. 37. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising a first stomach engager configured to engage a first portion of the stomach wall, a second member comprising a second stomach engager portion configured to engage a second portion of the stomach wall, a main portion, wherein the first and second members are connected to the main portion,an operation device for operating at least the second member to displace the second member in a direction away from the first member, for stretching the stomach wall between the first and second portions, wherein a portion of the operation device is placed in a remote unit configured to be placed at a remote location in the body of the patient, anda force transferring element configured to transfer force hydraulically or mechanically from the remote unit to the main portion, for operating the second member. 38. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portion, an acoustic sensor configured to sense at least one sound related to the patient swallowing, and a controller configured to: receive a signal from the acoustic sensor, and control the operation device on the basis of the signal received from the acoustic sensor. 39. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, an operation device for operating the second member to displace the second member in a first direction relative to the first member, for stretching the stomach wall between the first and second portion, a sensor configured to: sense at least one parameter related to the patient swallowing, and be fixated to a structure of the body comprising bone, and a controller configured to: receive a signal from the sensor, and control the operation device on the basis of the signal received from the sensor. 40. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a first member comprising: a first stomach engager configured to engage a first portion of the stomach wall, and a second stomach engager portion configured to engage a second portion of the stomach wall, a second member comprising: a first stomach engager configured to engage a third portion of the stomach wall, and a second stomach engager portion configured to engage a fourth portion of the stomach wall, a main portion, wherein the first and second members are operably connected to the main portion, an operation device comprising an actuator, wherein the operation device is configured to displace the actuator, such that the actuator is configured to: in a first state, operate the first member for displacing the first stomach engager of the first member in relation to the second stomach engager of the first member, for stretching the stomach wall, and in a second state, operate the second member for displacing the first stomach engager of the second member in relation to the second stomach engager of the second member, for stretching the stomach wall. 41. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises an implantable operation device for operating a body engaging portion of a medical implant, the implantable operation device comprising: an electrical machine for transforming electrical energy to mechanical force, a flexible shaft for transferring the mechanical force to a body engaging portion, and a pre-tensioning device for creating a pre-tension in the flexible shaft. 42. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises an implantable operation device for operating a body engaging portion of a medical implant, the implantable operation device comprising: an electrical machine for transforming electrical energy to mechanical force, a transmission for transforming a mechanical force created by electrical transforming device from a force having a first speed and a first strength to a force having a second lower speed and a second higher strength, wherein the transmission comprises: a first and second pulley, a flexible element configured to be placed around the first and second pulley, wherein the flexible element is configured to be pulled by the force having the first speed and first strength, causing the first and second pulley to displace in relation to each other with the force having the second lower speed and the second higher strength, thereby creating the transmission. 43. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a second member configured to be fixated to the stomach wall of the patient and comprising a closed curve, a first member configured to be fixated to the stomach wall of the patient within the footprint of the second member, wherein the first member is operably connected to the second member such that the first member can be displaced: relative to the second member, and within the footprint of the second member, for stretching a portion of the stomach wall of the patient between the second and first member. 44. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: a second member configured to be fixated to the stomach wall of the patient, and an operable first member connected to the second member and configured to be fixated to the stomach wall at least partially within the footprint of the second member, wherein the first member is configured to be operated to deform such that a first portion of the first member is moved away from a first portion of the second member, for stretching a portion of the stomach wall between the first portion of the first member and the first portion of the second member. 45. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: an operable first member configured to be fixated to a first portion of the stomach wall, and a second member configured to be fixated to a second portion of the stomach wall, and an operation device, characterized in that the operation device is configured to pull at least a portion of the first member in a first direction away from at least one portion of the second member, for stretching a portion of the stomach wall between the first portion of the stomach wall and the second portion of the stomach wall for creating the sensation of satiety. 46. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: an operable first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, a mechanical operation device configured to move at least a portion of the first member in a first direction away from at least one portion of the second member, for stretching a portion of the stomach wall between the first portion of the stomach wall and the second portion of the stomach wall, for creating the sensation of satiety, wherein a portion of the operation device is placed in a remote unit configured to be placed at a remote location in the body of the patient, and a force transferring element configured to transfer mechanical force from the remote unit to the first member, for operating the first member. 47. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises a medical device for actively stretching a stomach wall of a patient for creating a sensation of satiety, the medical device being implantable and comprising: an operable first member configured to be fixated to a first portion of the stomach wall, a second member configured to be fixated to a second portion of the stomach wall, an operation device configured to: move at least a portion of the first member in a first direction relative to at least one portion of the second member, for stretching a portion of the stomach wall between the first and second members, and at least one of: move at least a portion of the operable first member in a second direction relative to at least one portion of the second member, and move an operable third member in a third direction for stretching a portion of the stomach wall between the third and second members, and a mechanical switching device configured to switch the operation device:from operating the first member to move in the first direction to operating the first member to move in the second direction, or from operating the first member to move in the first direction to operating the third member to move in the third direction. 48. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises an implantable operation device for operating a body engaging portion of a medical implant, the implantable operation device comprising: an electrical machine for transforming electrical energy to mechanical force, a transmission for transforming rotational force created by the electrical machine to a linear force, a shaft for transferring rotational and linear force from the operation device to the body engaging portion of the medical implant,a switch placed between the electrical machine and the shaft, wherein the switch is configured to switch the force exerted on shaft such that: in a first state, a rotational force is exerted on the shaft, and in a second, a linear force is exerted in the shaft. 49. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises: - a volume filling device adapted to be at least substantially invaginated by a stomach wall portion of the patient with the outer surface of the volume filling device resting against the stomach wall, such that the volume of the food cavity is reduced in size by a volume substantially exceeding the volume of the volume filling device, characterized by - at least one adjustable stretching device adapted to be at least substantially invaginated by a stomach wall portion of the patient with the outer surface of the stretching device resting against the stomach wall and adapted to stretch a portion of stomach wall, and - a fluid connection device interconnecting the volume filling device and the stretching device. 50. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises a device for treating obesity of a patient comprising: at least one operable stretching device (10; 110) implantable in the patient and adapted to stretch a portion of the patient's stomach wall (12), and an implantable control unit (42) for automatically controlling the operable stretching device, when the control unit and stretching device are implanted, to stretch the stomach wall portion in connection with the patient eating such that satiety is created, characterized in that the stretching device comprises a first and a second engaging part (10''; 110a; 110b; 210a; 210b), wherein: the first part is adapted to be engaged to a first area of the stomach wall, and the second part is adapted to be engaged to a second area of the stomach wall, and wherein the stretching device is adapted to stretch a portion of the stomach wall between the first area and the second area. 51. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises an obesity treatment device comprising: - at least one operable stretching device (10; 10"; 110a; 110b; 410b; 50; 810) implantable in a patient and adapted to stretch a portion of the patient's stomach wall (12) and - an implantable operation device (90; 42; 54; 40; 217; 218; 452) for operating the stretching device, when implanted, to stretch the stomach wall portion such that satiety is created, characterized in that the operable stretching device is adapted to be placed against the outside of the stomach wall. 52. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises a device for treating obesity of a patient, the device comprising: at least one operable stretching device implantable in the patient and adapted to stretch a portion of the patient’s stomach wall, and an implantable control unit for controlling the operable stretching device, when the control unit and the stretching device are implanted, to stretch the stomach wall portion in connection with the patient eating such that satiety is created, characterized in that the stretching device comprises a first engaging part and a second engaging part, wherein: the first engaging part is adapted to be engaged to a first area of the stomach wall, and the second engaging part is adapted to be engaged to a second area of the stomach wall, and wherein the stretching device is adapted to stretch a portion of the stomach wall between the first area and the second area. 53. The implantable medical device according to any one of the preceding embodiments, wherein the implantable medical device comprises a device for treating obesity of a patient, the device comprising: a. at least one operable stretching device implantable in the patient operating via mechanical, pneumatic, and/or hydraulic action to stretch a portion of the patient’s stomach wall, and b. an implantable control unit for automatically controlling the operable stretching device, when the control unit and stretching device are implanted, to stretch the stomach wall portion in connection with the patient eating such that satiety is created.ASPECT 331B – eHealth General Security Module 1. An implantable controller for an implantable medical device, the implantable controller comprises: a wireless transceiver for communicating wirelessly with an external device, a security module, and a central unit configured to be in communication with the wireless transceiver and the security module. wherein: the wireless transceiver is configured to receive data from the external device including at least one instruction to the implantable medical device, and transmit the received communication to the central unit,the central unit is configured to send the data to the security module, derived from the received communication from the external device, and the security module is configured to: decrypt at least a portion of the data or verify the authenticity of the data, and communicate the at least one instruction to the implantable medical device based on a successful decryption or verification of the secure communication, wherein the implantable medical device comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 2. An implantable controller for an implantable medical device, the implantable controller comprises: a wireless transceiver for communicating wirelessly with an external device, a security module, and a central unit configured to be in communication with the wireless transceiver and the security module. wherein: the wireless transceiver is configured to receive data from the external device including at least one instruction to the implantable medical device, and transmit the received communication to the central unit, the central unit is configured to send the data to the security module, derived from the received communication from the external device, and the security module is configured to: decrypt at least a portion of the data or verify the authenticity of the data, and communicate the at least one instruction to the implantable medical device based on a successful decryption or verification of the secure communication, wherein the implantable medical device comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal. 3. An implantable controller for an implantable medical device, the implantable controller comprises: a wireless transceiver for communicating wirelessly with an external device, a security module, and a central unit configured to be in communication with the wireless transceiver and the security module. wherein: the wireless transceiver is configured to receive data from the external device including at least one instruction to the implantable medical device, and transmit the received communication to the central unit,the central unit is configured to send the data to the security module, derived from the received communication from the external device, and the security module is configured to: decrypt at least a portion of the data or verify the authenticity of the data, and communicate the at least one instruction to the implantable medical device based on a successful decryption or verification of the secure communication, wherein the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. An implantable controller for an implantable medical device, the implantable controller comprises: a wireless transceiver for communicating wirelessly with an external device, a security module, and a central unit configured to be in communication with the wireless transceiver and the security module. wherein: the wireless transceiver is configured to receive data from the external device including at least one instruction to the implantable medical device, and transmit the received communication to the central unit, the central unit is configured to send the data to the security module, derived from the received communication from the external device, and the security module is configured to: decrypt at least a portion of the data or verify the authenticity of the data, and communicate the at least one instruction to the implantable medical device based on a successful decryption or verification of the secure communication, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina. 5. The implantable controller according to any of embodiments 1-4, wherein the security module comprises a set of rules for accepting communication from the central unit. 6. The implantable controller according to any of embodiments 1-4, wherein the wireless transceiver is configured to be placed in an off- mode, in which no wireless communication can be transmitted or received by the wireless transceiver, and wherein the set of rules comprises a rule stipulating that data from the central unit is only accepted by the security module when the wireless transceiver is placed in the off-mode. 7. The implantable controller according to embodiment 6, wherein the set of rules comprises a rule stipulating that data from the central unit is only accepted when the wireless transceiver has been placed in the off-mode for a specific time period.8. The implantable controller according to any one of the preceding embodiments wherein the central unit is configured to verify a digitalsignature of the received data from the external device and on a positive verification send the received data to the security module. 9. The implantable controller according to embodiment 7, wherein the set of rules comprises a rule stipulating that data from the central unit is only accepted when the digital signature of the received communication has been verified by the central unit. 10. The implantable controller according to any one of the preceding embodiments, wherein the central unit is configured to verify the size of the received data from the external device. 11. The implantable controller according to embodiment 10, wherein the set of rules comprises a rule stipulating that data from the central unit is only accepted when the size of the received data has been verified by the central unit. 12. The implantable controller according to any one of the preceding embodiments, wherein: the wireless transceiver is configured to receive data from the external device being encrypted with at least a first and second layer of encryption, the central unit is configured to decrypt a first layer of decryption of the data to obtain a first decrypted data, and transmit the first decrypted data comprising the second layer of encryption to the security model, and the security module is configured to decrypt the second layer of encryption of the first decrypted data and transmit the at least one instruction to the implantable medical.13. The implantable controller according to embodiment 12, wherein the central unit is configured to decrypt a portion of the data comprising a digital signature, such that the digital signature can be verified by the central unit.14. The implantable controller according to embodiment 12, wherein the central unit is configured to decrypt a portion of the data comprising message size information, such that the data size can be verified by the central unit. 15. The implantable controller according to embodiment 12, wherein the central unit is configured to decrypt a first and second portion of the data, and wherein the first portion comprises a checksum for verifying the authenticity of the second portion. 16. The implantable controller according to embodiment 7, wherein the set of rules comprises a rule related to the rate of data transfer between the central unit and the security module.17. The implantable controller according to any one of embodiments 12 – 16, wherein the security module is configured to decrypt a portion of the data comprising a digital signature, encrypted with the second layer of encryption, such that the digital signature can be verified by the security module.18. The implantable controller according to any one of embodiments 7 – 17, wherein the central unit is only able to decrypt a portion of the data received from the external device when the wireless transceiver is placed in the off-mode.19. The implantable controller according to any one of embodiments 7 – 18, wherein the security unit is only able to communicate the at least one instruction to the implantable medical device when the wireless transceiver is placed in the off-mode. 20. The implantable controller according to any one of the preceding embodiments, wherein the implantable controller is configured to: receive, using the wireless transceiver, a message from the external device comprising a first un-encrypted portion and a second encrypted portion, decrypt the encrypted portion, anduse the decrypted portion to verify the authenticity of the un-encrypted portion. 21. The implantable controller according to any one of embodiment 20, wherein the un-encrypted portion comprises at least a portion of the at least one instruction to the implantable medical device.22. The implantable controller according to any one of the preceding embodiments, wherein the implantable controller is configured to: receive, using the wireless transceiver, a message from the external device comprising information related to at least one of: a physiological parameter of the patient and a physical parameter of the implanted medical device, and use the received information to verify the authenticity of the message. 23. The implantable controller according to embodiment 22, wherein the physiological parameter of the patient comprises at least one of: a temperature, a heart rate and a saturation value. 24. The implantable controller according to embodiment 22, wherein the physical parameter of the implanted medical device comprises at least one of: a current setting or value of the implanted medical device, a prior instruction sent to the implanted medical device or an ID of the implanted medical device.25. The implantable controller according to any one of embodiments 22 – 24, wherein the portion of the message comprising the information is encrypted, and wherein the central unit is configured to transmit the encrypted portion to the security module. 26. The implantable controller according to any one of the preceding embodiments, wherein the security module comprises a hardwaresecurity module comprising at least one hardware-based key. 27. The implantable controller according to embodiment 26, wherein the hardware-based key corresponds to a hardware-based key in the external device.28. The implantable controller according to embodiment 26, wherein the hardware-based key corresponds to a hardware-based key on a key-card connectable to the external device. 29. The implantable controller according to any one of the preceding embodiments, wherein the security module comprises a software security module comprising at least one software-based key. 30. The implantable controller according to embodiment 29, wherein the software-based key corresponds to a software-based key in the external device. 31. The implantable controller according to embodiment 29, wherein the software-based key corresponds to a software-based key on a key- card connectable to the external device. 32. The implantable controller according to any one of the preceding embodiments, wherein the security module comprises a combination of a software-based key and a hardware-based key. 33. The implantable controller according to any one of the preceding embodiments, wherein the security module comprises at least one crypto processor. 34. The implantable controller according to any one of the preceding embodiments, wherein the wireless transceiver is configured to receive communication from a handheld external device. 35. The implantable controller according to any one of the preceding embodiments, wherein the at least one instruction to the implantable medical device comprises an instruction for changing an operational state of the implantable medical device.36. The implantable controller according to any one of the preceding embodiments, wherein the wireless transceiver is configured to communicate wirelessly with the external device using electromagnetic waves at a frequency below 100 kHz. 37. The implantable controller according to embodiment 36, wherein the wireless transceiver is configured to communicate wirelessly with the external device using electromagnetic waves at a frequency below 40 kHz. 38. The implantable controller according to any one of the preceding embodiments, wherein: the wireless transceiver is configured to communicate wirelessly with the external device using a first communication protocol, the central unit is configured to communicate with the security module using a second communication protocol, and the first and second communication protocols are different. 39. The implantable controller according to any one of the preceding embodiments, wherein the wireless transceiver is configured to communicate wirelessly with the external device using a standard network protocol. 40. The implantable controller according to embodiment 39, wherein the standard network protocol is selected from a list comprising: RFIDtype protocol, WLAN type protocol, Bluetooth type protocol, BLE type protocol, NFC type protocol, 3G/4G/5G type protocol, and GSM type protocol.41. The implantable controller according to any one of embodiments 1 – 38, wherein the wireless transceiver is configured to communicate wirelessly with the external device using a proprietary network protocol.42. The implantable controller according to any one of embodiments 1 – 41, wherein the wireless transceiver comprises a UWB transceiver.43. The implantable controller according to any one of the preceding embodiments, wherein the security module and the central unit are comprised in a controller. 44. The implantable controller according to any one of the preceding embodiments, wherein the central module and the security module are implemented in a respective processor on a chip. 45. The implantable controller according to embodiment 43 or 44, wherein the wireless transceiver is comprised in the controller. 46. The implantable controller according to any one of the preceding embodiments, wherein the implantable medical device is an implantable medical device configured to exert a force on a body portion of the patient. 47. The implantable controller according to any one of the preceding embodiments, wherein the implantable medical device comprises an electrical motor and wherein the controller is configured for controlling the electrical motor.48. The implantable controller according to any one of embodiments 1 – 47 wherein the implantable medical device comprises at least one of: an external heart compression device, an apparatus assisting the pump function of a heart of the patient, an apparatus assisting the pump function comprising a turbine bump placed within a patient’s blood vessel for assisting the pump function of the heart, an operable artificial heart valve, an operable artificial heart valve for increasing the blood flow to the coronary arteries. an implantable drug delivery device, an implantable drug delivery device for injecting directly into a blood vessel and change the position of the injection site, all from within the patient’s body, an implantable drug delivery device for injecting potency enhancing drugs into an erectile tissue of the patient, a hydraulic, mechanic, and/or electric constriction implant, an operable volume filling device, an operable gastric band, an operable implant for stretching the stomach wall of the patient for creating satiety, an implant configured to sense the frequency of the patient ingesting food, an operable cosmetic implant, an operable cosmetic implant for adjust the shape and/or size in the breast region of a patient, an implant controlling medical device for the emptying of a urinary bladder, an implant hindering urinary leakage, an implant hindering anal incontinence, an implant controlling the emptying of fecal matter, an implant monitoring an aneurysm, an implant for hindering the expansion of an aneurysm, an implant lubricating a joint, an implant for affecting the blood flow to an erectile tissue of the patient, an implant for simulating the engorgement of an erectile tissue, an implant with a reservoir for holding bodily fluids, an implant storing and/or emptying a bodily reservoir or a surgically created reservoir, an implant communicating with a database outside the body, an implant able to be programmed from outside the body, an implant able to be programmed from outside the body with a wireless signal, an implant treating impotence, an implant controlling the flow of eggs in the uterine tube, an implant controlling the flow of sperms in the uterine tube, an implant controlling the flow of sperms in the vas deferens, an implant for hindering the transportation of the sperm in the vas deferens, an implant treating osteoarthritis, an implant performing a test of parameters inside the body, an implant controlling specific treatment parameters from inside the body, an implant controlling bodily parameters from inside the body, an implant controlling the blood pressure, an implant controlling the blood pressure by affecting the dilatation of the renal artery, an implant controlling a drug treatment parameter, an implant controlling a parameter in the blood, an implant for adjusting or replacing any bone part of a body of the patient, an implant replacing an organ of the patient or part of an organ of the patient or the function thereof, a vascular treatment device, an implant adapted to move fluid inside the body of the patient, an implant configured to sense a parameter related to the patient swallowing, an implant configured to exercise a muscle with electrical or mechanical stimulation, an implant configured for emptying an intestine portion on command, an operable implant configured to be invaginated in the stomach of the patient to reduce the volume of the stomach substantially more than the volume of the device, an implant configured for emptying the urinary bladder from within the patient’s body by compressing the bladder, an implant configured for draining fluid from within the patient’s body, an implant configured for the active lubrication of a joint with an added lubrication fluid, an implant configured for removing clots and particles from the patient’s blood stream, an implant configured for elongating or straightening a bone in the patient, to reduce scoliosis, a device to stimulate the brain for a several position to a focused point, an artificial stomach replacing the function of the natural stomach, an implant configured for adjusting the position of a female’s urinary tract or bladder neck, an implant configured for stimulating the ampulla vas deference and creating temporary constriction. Aspect group 464SE: Stimulation_Electrical_Feedback_Measured effect1. A system for affecting an effector response in a patient, comprising: a stimulation device configured to deliver, directly or indirectly, a stimulation signal to at least one of an effector tissue and a nerve innervating the effector tissue of the patient; a sensor device configured to generate a sensor signal indicating an effector response in the effector tissue; a control unit configured to: receive the sensor signal, and control an operation of the stimulation device based at least in part on the sensor signal, wherein the system further comprises system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall.2. A system for affecting an effector response in a patient, comprising: a stimulation device configured to deliver, directly or indirectly, a stimulation signal to at least one of an effector tissue and a nerve innervating the effector tissue of the patient; a sensor device configured to generate a sensor signal indicating an effector response in the effector tissue; a control unit configured to: receive the sensor signal, and control an operation of the stimulation device based at least in part on the sensor signal, wherein the implantable medical device further comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.3. A system for affecting an effector response in a patient, comprising: a stimulation device configured to deliver, directly or indirectly, a stimulation signal to at least one of an effector tissue and a nerve innervating the effector tissue of the patient; a sensor device configured to generate a sensor signal indicating an effector response in the effector tissue; a control unit configured to: receive the sensor signal, and control an operation of the stimulation device based at least in part on the sensor signal, wherein the system further comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.4. A system for affecting an effector response in a patient, comprising: a stimulation device configured to deliver, directly or indirectly, a stimulation signal to at least one of an effector tissue and a nerve innervating the effector tissue of the patient; a sensor device configured to generate a sensor signal indicating an effector response in the effector tissue; a control unit configured to: receive the sensor signal, and control an operation of the stimulation device based at least in part on the sensor signal wherein the system further comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina.5. The system according to any one of aspects 1–4, wherein the sensor device comprises a sensor electrode configured to measure an electric activity in the effector tissue in response to the stimulation signal.6. The system according to any one of aspects 1–4, wherein the sensor device comprises a sensor electrode configured to measure a change in electrical impedance in the effector tissue in response to the stimulation signal.7. The system according to any one of aspects 1–4, wherein sensor device comprises an electromyographic sensor configured to measure an electric activity in the effector tissue and an electric impedance sensor configured to measure a change in electrical impedance in the effector tissue.8. The system according to aspect 5 or 6, wherein: the sensor electrode is configured to be arranged at the effector tissue; the sensor device further comprises a reference electrode, and the sensor device is configured to generate the sensor signal based on an electrical interaction between the sensor electrode and the reference electrode.9. The system according to aspect 8, wherein the reference electrode is formed by a housing of the stimulation device or the sensor device.10. The system according to any of the preceding aspects, wherein the sensor device is configured to measure mechanical movement in the effector tissue in response to the stimulation signal.11. The system according to aspect 10, wherein the sensor device comprises a strain gauge configured to measure a contraction or relaxation of the effector tissue in response to the stimulation signal.12. The system according to aspect 11, wherein the sensor device is configured to measure a heart rate of the patient.13. The system according to aspect 11, wherein the sensor device is configured to measure a blood pressure of the patient.14. The system according to aspect 11, wherein the sensor device is configured to measure a rate of respiration of the patient.15. The system according to any of the preceding aspects, wherein the control unit is configured to determine a response measure based on the sensor signal, the response measure being indicative of the effector response.16. The system according to aspect 15, wherein the control unit is configured to: compare the response measure with a predetermined reference measure; and control the stimulation device to: increase an intensity of the stimulation signal in response to the response measure being below the reference measure, and reduce the intensity of the stimulation signal in response to the response measure exceeding the reference measure.17. The system according to aspect 16, wherein the control unit is configured to: increase the intensity of the stimulation signal by increasing at least one of a frequency, current amplitude, and voltage amplitude of the stimulation signal; and reduce the intensity of the stimulation signal by reducing at least one of the frequency, current amplitude, and voltage amplitude of the stimulation signal.18. The system according to aspect 16 or 17, wherein the predetermined reference measure is based on a previous measurement of the effector response in the patient.19. The system according to aspect 16 or 17, wherein the predetermined reference measure is based on previous measurements of effector responses in other patients.20. The system according to aspect 15, wherein the control unit is configured to monitor the level of effector response over time, and to control the stimulation device based on a change rate in the effector response over time.21. The system according to aspect 15, wherein the control unit is configured to determine a calibration parameter of the stimulation device based on the response measure.22. The system according to any of the preceding aspects, wherein the control unit is configured to control the operation of the stimulation device to generate an effector response being at least one of a muscular response and a glandular response.23. The system according to aspect 22, wherein the effector tissue is smooth muscle tissue.24. The system according to aspect 23, wherein the effector tissue forms part of a blood vessel, an intestine, or a urine bladder of the patient.25. The system according to any of the preceding aspects, wherein the control unit is configured to control the operation of the stimulation device such that the stimulation signal is a periodic signal including at least one of: a variable frequency component, a variable duty cycle component, a variable amplitude component, and a variable pause component.26. The system according to aspect 25, wherein the stimulation signal is one of a low-frequency signal with an amplitude varying in the range of 0.1-100 Hz and a high-frequency signal with an amplitude varying in the range of 1-10 kHz.27. The system according to any of the preceding aspects, wherein the stimulation signal comprises series of pulses having a negative voltage relative to ground.28. The system according to aspect 27, wherein the control unit is configured to operate the stimulation device to generate a positive voltage pulse following one or more negative voltage pulses.29. The system according to any of the preceding aspects, wherein the stimulation signal is an electric signal or a vibrational signal.30. The system according to any of the preceding aspects, wherein the stimulation device comprises a first stimulation electrode and a second stimulation electrode, the first stimulation electrode and the second stimulation electrode are configured to be spaced apart along the nerve innervating the effector tissue. 31. The system according to aspect 30, wherein the stimulation device is configured to generate the stimulation signal such that the first stimulation electrode serves as a cathode and the second stimulation electrode serves as an anode.32. The system according to aspect 30 or 31, further comprising a cuff configured to be at least partially arranged around the nerve and to hold the first and second stimulation electrodes in place against the nerve.33. The system according to any of the preceding aspects, further comprising: a suppression electrode arrangement configured to be coupled to the nerve to apply a suppression signal suppressing action potentials propagating in the nerve in a direction towards the central nervous system.34 The system according to aspect 33, wherein the control unit is configured to regulate the suppression signal so as to suppress the action potentials induced in response to the stimulation device applying the stimulation signal.35. The system according to aspect 33 or 34, wherein stimulation device is configured to be coupled to the nerve at a position between the effector tissue and the suppression electrode arrangement, so as to induce action potentials travelling in the nerve in a direction towards the effector tissue.36. The system according to any of aspects 33-35, wherein the control unit is configured to regulate the suppression of the action potentials so as to inhibit an undesired response of the nervous system of the patient, the undesired response being generated responsive to the stimulation device applying the stimulation signal.37. The system according to any of aspects 33-36, wherein the control unit is configured to drive the stimulation device and the suppression electrode arrangement such that each of the stimulation device and the suppression electrode arrangement is actuated in sequence, with a delay of the suppression signal timed to generally match a conduction velocity of the stimulation signal in the nerve.38. The system according to any of aspects 33-36, wherein the control unit is configured to drive the stimulation device and the suppression electrode arrangement to apply the first stimulation signal and the suppression signal substantially at the same time.39. The system according to any of aspects 33-36, wherein the control unit is configured to drive the stimulation device and the suppression electrode arrangement such that each of the stimulation signal and the suppression signal is a time-varying signal, wherein the stimulation signals is a low-frequency signal, and the suppression signal is a high-frequency signal.40. The system according to any of aspects 33-39, wherein an amplitude of the stimulation signal varies with a frequency in the range of 0.1-100 Hz and wherein an amplitude of the suppression signal varies with a frequency in the range of 1-10 kHz. Aspect group 467SE: Stimulation_Electrical_Inhibition/Denervation_System1. A system for at least partly denervating an effector tissue of a patient, comprising: an inhibition device configured to temporarily inhibit a nerve innervating the effector tissue; a sensor configured to generate a sensor signal indicative of an effector response in the effector tissue, the effector responsebeing at least partly induced by the inhibiting of the nerve; a processing unit configured to: determine a response measure based on the sensor signal, the response measure being indicative of the effector response; compare the response measure with a predetermined reference measure, and determine, based on the comparison, that a desired effector response has been achieved; wherein the system further comprises a denervation device configured to at least partly denervate the effector tissue, wherein the system further comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall.2. A system for at least partly denervating an effector tissue of a patient, comprising: an inhibition device configured to temporarily inhibit a nerve innervating the effector tissue; a sensor configured to generate a sensor signal indicative of an effector response in the effector tissue, the effector response being at least partly induced by the inhibiting of the nerve; a processing unit configured to: determine a response measure based on the sensor signal, the response measure being indicative of the effector response; compare the response measure with a predetermined reference measure, and determine, based on the comparison, that a desired effector response has been achieved; wherein the system further comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.3. A system for at least partly denervating an effector tissue of a patient, comprising: an inhibition device configured to temporarily inhibit a nerve innervating the effector tissue; a sensor configured to generate a sensor signal indicative of an effector response in the effector tissue, the effector response being at least partly induced by the inhibiting of the nerve; a processing unit configured to: determine a response measure based on the sensor signal, the response measure being indicative of the effector response; compare the response measure with a predetermined reference measure, and determine, based on the comparison, that a desired effector response has been achieved; wherein the system further comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit. 4. A system for at least partly denervating an effector tissue of a patient, comprising: an inhibition device configured to temporarily inhibit a nerve innervating the effector tissue; a sensor configured to generate a sensor signal indicative of an effector response in the effector tissue, the effector response being at least partly induced by the inhibiting of the nerve; a processing unit configured to: determine a response measure based on the sensor signal, the response measure being indicative of the effector response; compare the response measure with a predetermined reference measure, and determine, based on the comparison, that a desired effector response has been achieved; wherein the system further comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina.5. The system according to any one of aspects 1–4, wherein the inhibition device comprises a cooling device configured to cool the nerve to cause a temporary inhibition of the nerve.6. The system according to any one of aspects 1–41, wherein the inhibition device is a toxin administration device configured to deliver a neurotoxin to the nerve to cause a temporary inhibition of the nerve.7. The system according to any one of aspects 1–4, wherein the inhibition device is a vibrational device configured to deliver an inhibition signal to the nerve to cause a temporary inhibition of the nerve.8. The system according to any one of aspects 1–4, wherein the inhibition device is an electric stimulation device configured to deliver an inhibition signal to the nerve to cause a temporary inhibition of the nerve.9. The system according to aspect 7 or 8, wherein the inhibition signal is a periodic signal including at least one of: a variable frequency component, a variable duty cycle component, a variable amplitude component, and a variable pause component.10. The system according to any of aspects 7-9, wherein the inhibition signal comprises an amplitude varying in the range of 1-10 kHz.11. The system according to any of aspects 8-10, wherein the inhibition signal is an electric signal comprising a series of pulses having a negative voltage relative to ground.12. The system according to aspect 11, wherein the electric stimulation device is configured to generate a positive voltage pulse following one or more negative voltage pulses.13. The system according to any of aspects 8-12, wherein the inhibition device comprises a first inhibition electrode and a secondinhibition electrode, the first inhibition electrode and the second inhibition electrode being configured to be arranged spaced apart along the nerve innervating the effector tissue.14. The system according to aspect 13, wherein the inhibition device is configured to generate the inhibition signal such that the first inhibition electrode serves as a cathode and the second inhibition electrode serves as an anode.15. The system according to any of aspects 8-14, wherein the inhibition device further comprises a suppression electrode arrangement configured to be coupled to the nerve to apply a suppression signal suppressing action potentials propagating in the nerve in a direction towards the central nervous system.16. The system according to aspect 15, wherein the inhibition device is configured to regulate the suppression signal so as to suppress the action potentials induced in response to the electric inhibition signal.17. The system according to aspect 15 or 18, wherein the inhibition device is configured to apply the electric inhibition signal to the nerve at a position between the effector tissue and the position in which the suppression signal is applied to the nerve.18. The system according to any of aspects 15-17, wherein the inhibition device is configured to regulate the suppression of the action potentials so as to inhibit an undesired response of the nervous system of the patient, the undesired response being generated responsive to the electric inhibition signal.19. The system according to any of aspects 15-18, wherein the inhibition device is configured to apply the electric inhibition signal and the suppression signal in sequence, with a delay of the suppression signal timed to generally match a conduction velocity of the electric inhibition signal in the nerve.20. The system according to any of the preceding aspects, wherein the sensor device comprises a sensor electrode configured to measure an electric activity in the effector tissue.21. The system according to any of the preceding aspects, wherein the sensor device comprises a sensor electrode configured to measure a change in electrical impedance in the effector tissue.22. The system according to aspect 20 or 21, wherein: the sensor electrode is configured to be arranged at the effector tissue; the sensor further comprises a reference electrode, and the sensor device is configured to generate the sensor signal based on an electrical interaction between the sensor electrode and the reference electrode.23. The system according to any of the preceding aspects, wherein the inhibition device is configured to temporarily inhibit a nerveinnervating effector tissue forming part of a renal artery of the patient, and wherein the sensor is configured to generate a sensor signal indicative of a vasodilation or vasoconstriction of the renal artery.24. The system according to any of aspects 1-22, wherein the inhibition device is configured to temporarily inhibit a nerve innervating effector tissue forming part of a gastrointestinal tract of the patient, and wherein the sensor is configured to generate a sensor signal indicative of a level of motility of the gastrointestinal tract.25. The system according to any of aspects 1-22, wherein the inhibition device is configured to temporarily inhibit a nerve innervating effector tissue being glandular tissue, and wherein the sensor is configured to generate a sensor signal indicative of a level of glandular secretion of the glandular tissue.26. The system according to aspect 25, wherein the glandular tissue forms part of at least one of: a pancreas secreting insulin, a gallbladder secreting bile, and an adrenal gland secreting adrenaline, aldosterone, or cortisol.27. The system according to any of aspects 1-22, wherein the inhibition device is configured to temporarily inhibit a nerve innervating effector tissue being muscle tissue, and wherein the sensor is configured to generate a sensor signal indicative of mechanical movement of the muscle tissue.28. The system according to aspect 27, wherein the sensor device comprises a strain gauge configured to measure a contraction or relaxation of the muscle tissue.29. The system according to any of aspects 1-22, wherein the sensor device is configured to measure a heart rate of the patient.30. The system according to any of aspects 1-22, wherein the sensor device is configured to measure a blood pressure of the patient.31. The system according to any of aspects 1-22, wherein the sensor device is configured to measure a rate of respiration of the patient.32. The system according to any of the preceding aspects, wherein the denervation device is an ablation device.33. The system according to aspect 32, wherein the ablation device is configured to at least partly denervate the effector tissue by means of at least one of: surgical ablation, radiofrequency ablation, cryoablation, laser ablation, heat ablation, electrocautery, and chemical ablation. Aspect group 471SE: Stimulation_Electrical_General_DC-blocking capacitor 1. A system for stimulating an effector tissue of a patient, comprising: a stimulation device configured to deliver a stimulation signal to at least one of the effector tissue and a nerve innervating the effector tissue of the patient; a source of energy configured to energize the stimulation device; a control unit operably connected to the stimulation device and configured to control an operation of the stimulation device such that the stimulation signal causes at least one of an effector response and inhibition of the effector response in the effector tissue; and a capacitor configured to reduce a current leakage of the system to 1 µA or less, such as 0.1 µA or less.2. The system according to aspect 1, wherein the capacitor is configured to be connected in series with the body of the patient andleast one of the stimulation device, the source of energy, and the control unit.3. The system according to aspect 1, wherein the stimulation device comprises an electrode arrangement configured to be coupledto the effector tissue or the nerve, and wherein the capacitor is configured to be connected in series with the body of the patient and the electrode arrangement.4. The system according to aspect 1, wherein the electrode arrangement comprises a first stimulation electrode and a secondstimulation electrode for applying the stimulation signal, and wherein the capacitor is configured to be connected in series with the first stimulation electrode and the second stimulation electrode.5. The system according any of the preceding aspects, wherein the capacitor is integrated in a circuitry for controlling the operation of the stimulation device.6. The system according to any of the preceding aspects, further comprising a printed circuit board, PCB, supporting the capacitor and at least one of the stimulation device, the source of energy, and the control unit.7. The system according to aspect 6, wherein the PCB is at least one of a multi-layer PCB, a flexible PCB, and a stretchable PCB.8. The system according to any of the preceding aspects, wherein: the stimulation device is configured to deliver a first stimulation signal to a sympathetic nerve innervating a first effector tissue of the patient and a second stimulation signal to a parasympathetic nerve innervating a second effector tissue, and the control unit is configured to control the operation of the stimulation device such that: the first stimulation signal stimulates an activity of the sympathetic nerve and the second stimulation signal inhibits an activity of the parasympathetic nerve, or s the first stimulation signal inhibits an activity of the sympathetic nerve and the second stimulation signal stimulated an activity of the parasympathetic nerve.9. The system according to aspect 8, wherein: the first signal is a low-frequency signal configured to stimulate the activity of the sympathetic nerve and the second signal is a high-frequency signal configured to inhibit the activity of the parasympathetic nerve; or the first signal is a high-frequency signal configured to inhibit the activity of the sympathetic nerve and the second signal is a low-frequency signal configured to stimulate the activity of the parasympathetic nerve.9. The system according to aspect 9, wherein an amplitude of the low-frequency signal varies with a frequency in the range of 0.1- 100 Hz and wherein an amplitude of the high-frequency signal varies with a frequency in the range of 1-10 kHz.10. The system according to aspect 1, wherein: the stimulation device comprises a first and a second electrode arrangement, each configured to be coupled to at least one of an effector tissue and a nerve innervating the effector tissue of the patient; the control unit is configured to drive the stimulation device to apply, by means of the first electrode arrangement, a stimulation signal inducing the effector response in the effector tissue, and to apply, by means of the second electrode arrangement, a suppression signal suppressing action potentials propagating in the nerve towards the central nervous system, CNS; the control unit is further configured to regulate the suppression signal so as to suppress the action potentials induced in response to the stimulation device applying the stimulation signal.11. The system according to aspect 10, wherein the first electrode arrangement is configured to be coupled to the nerve at a position between the effector tissue and the second electrode, so as to induce action potentials travelling in the nerve in a direction towards the effector tissue.12. The system according to aspect 11, wherein the control unit is configured to regulate the suppression of the action potentials so as to inhibit an undesired response of the nervous system of the patient, the undesired response being generated responsive to the first electrode applying the stimulation signal.13. The system according to aspect 11 or 12, wherein the control unit is configured to drive the stimulation device such that each of the first and second electrode arrangements are actuated in sequence, with a delay of the suppression signal timed to generally match a conduction velocity of the stimulation signal.14. The system according to any of aspects 10-12, wherein the control unit is configured to drive the stimulation device to apply the stimulation signal and the suppression signal substantially at the same time.15. The system according to any of aspects 10-14, wherein the control unit is configured to drive the stimulation device such that each of the stimulation signal and the suppression signal is a time-varying signal, wherein the stimulation signal is a low-frequency signal, and the suppression signal is a high-frequency signal.16. The system according to aspect 15, wherein an amplitude of the stimulation signal varies with a frequency in the range of 0.1-100 Hz and wherein an amplitude of the suppression signal varies with a frequency in the range of 1-10 kHz.17. The system according to any of the preceding aspects, further comprising: a sensor device configured to generate a sensor signal indicating an effector response in the effector tissue; wherein the control unit is configured to: receive the sensor signal, and control an operation of the stimulation device based at least in part on the sensor signal.18. The system according to aspect 17, wherein the sensor device comprises a sensor electrode configured to measure an electric activity in the effector tissue in response to the stimulation signal.19. The system according to aspect 17, wherein the sensor device comprises a sensor electrode configured to measure a change in electrical impedance in the effector tissue in response to the stimulation signal.20. The system according to aspect 17, wherein sensor device comprises an electromyographic sensor configured to measure an electric activity in the effector tissue and an electric impedance sensor configured to measure a change in electrical impedance in the effector tissue. Aspect group 472SE: Stimulation_Electrical_General_Multi-layer PCB1. A system for stimulating an effector tissue of a patient, comprising: a stimulation device configured to deliver a stimulation signal to at least one of the effector tissue and a nerve innervating the effector tissue of the patient; a source of energy configured to energize the stimulation device; a control unit operably connected to the stimulation device and configured to control an operation of the stimulation device such that the stimulation signal causes at least one of an effector response and inhibition of the effector response in the effector tissue; and a printed circuit board, PCB, supporting at least one of the stimulation device, the source of energy, and the control unit; wherein the PCB is at least one of a multi-layer PCB, a flexible PCB, a stretchable PCB, wherein the system further comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall. 2. A system for stimulating an effector tissue of a patient, comprising: a stimulation device configured to deliver a stimulation signal to at least one of the effector tissue and a nerve innervating the effector tissue of the patient; a source of energy configured to energize the stimulation device; a control unit operably connected to the stimulation device and configured to control an operation of the stimulation device such that the stimulation signal causes at least one of an effector response and inhibition of the effector response in the effector tissue; and a printed circuit board, PCB, supporting at least one of the stimulation device, the source of energy, and the control unit; wherein the PCB is at least one of a multi-layer PCB, a flexible PCB, a stretchable PCB, wherein the system further comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.3. A system for stimulating an effector tissue of a patient, comprising: a stimulation device configured to deliver a stimulation signal to at least one of the effector tissue and a nerve innervating the effector tissue of the patient; a source of energy configured to energize the stimulation device; a control unit operably connected to the stimulation device and configured to control an operation of the stimulation device such that the stimulation signal causes at least one of an effector response and inhibition of the effector response in the effector tissue; and a printed circuit board, PCB, supporting at least one of the stimulation device, the source of energy, and the control unit; wherein the PCB is at least one of a multi-layer PCB, a flexible PCB, a stretchable PCB, wherein the system further comprises the implantable medical device comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.4. A system for stimulating an effector tissue of a patient, comprising: a stimulation device configured to deliver a stimulation signal to at least one of the effector tissue and a nerve innervating the effector tissue of the patient; a source of energy configured to energize the stimulation device; a control unit operably connected to the stimulation device and configured to control an operation of the stimulation device such that the stimulation signal causes at least one of an effector response and inhibition of the effector response in the effector tissue; and a printed circuit board, PCB, supporting at least one of the stimulation device, the source of energy, and the control unit; wherein the PCB is at least one of a multi-layer PCB, a flexible PCB, a stretchable PCB, wherein the system further comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina.5. The system according to any one of aspects 1–4, wherein the PCB comprises first multi-layer portion and a second multi-layer portion interconnected by a stretchable portion.6. The system according to any one of aspects 1–4wherein the PCB comprises first multi-layer portion and a second multi-layer portion interconnected by a flexible portion.7. The system according to any of the preceding aspects, further comprising a capacitor configured to reduce a current leakage of the system to 1 µA or less, such as 0.1 µA or less.8. The system according to aspect 7, wherein the capacitor is connected in series with a part of the system and the body of the patient.9. The system according to aspect 7, wherein the capacitor is connected in series with a first and a second stimulation electrode of the stimulation device.10. The system according to aspect 7 or 8, wherein the capacitor is arranged on the PCB.11. The system according to any one of aspects 1–4, wherein: the stimulation device is configured to deliver a first stimulation signal to a sympathetic nerve innervating a first effector tissue of the patient and a second stimulation signal to a parasympathetic nerve innervating a second effector tissue, and the control unit is configured to control the operation of the stimulation device such that: the first stimulation signal stimulates an activity of the sympathetic nerve and the second stimulation signal inhibits an activity of the parasympathetic nerve, or s the first stimulation signal inhibits an activity of the sympathetic nerve and the second stimulation signal stimulated an activity of the parasympathetic nerve.12. The system according to aspect 11, wherein: the first signal is a low-frequency signal configured to stimulate the activity of the sympathetic nerve and the second signal is a high-frequency signal configured to inhibit the activity of the parasympathetic nerve; or the first signal is a high-frequency signal configured to inhibit the activity of the sympathetic nerve and the second signal is a low-frequency signal configured to stimulate the activity of the parasympathetic nerve.13. The system according to aspect 12, wherein an amplitude of the low-frequency signal varies with a frequency in the range of 0.1- 100 Hz and wherein an amplitude of the high-frequency signal varies with a frequency in the range of 1-10 kHz.14. The system according to any one of aspects 1–4, wherein: the stimulation device comprises a first and a second electrode arrangement, each configured to be coupled to at least one of an effector tissue and a nerve innervating the effector tissue of the patient; the control unit is configured to drive the stimulation device to apply, by means of the first electrode arrangement, a stimulation signal inducing the effector response in the effector tissue, and to apply, by means of the second electrode arrangement, a suppression signal suppressing action potentials propagating in the nerve towards the central nervous system, CNS; the control unit is further configured to regulate the suppression signal so as to suppress the action potentials induced in response to the stimulation device applying the stimulation signal.15. The system according to aspect 14, wherein the first electrode arrangement is configured to be coupled to the nerve at a position between the effector tissue and the second electrode, so as to induce action potentials travelling in the nerve in a direction towards the effector tissue.16. The system according to aspect 15, wherein the control unit is configured to regulate the suppression of the action potentials so as to inhibit an undesired response of the nervous system of the patient, the undesired response being generated responsive to the first electrode applying the stimulation signal.17. The system according to aspect 14 or 15, wherein the control unit is configured to drive the stimulation device such that each of the first and second electrode arrangements are actuated in sequence, with a delay of the suppression signal timed to generally match a conduction velocity of the stimulation signal.18. The system according to any of aspects 14-16, wherein the control unit is configured to drive the stimulation device to apply the stimulation signal and the suppression signal substantially at the same time.19. The system according to any of aspects 14-18, wherein the control unit is configured to drive the stimulation device such that each of the stimulation signal and the suppression signal is a time-varying signal, wherein the stimulation signal is a low-frequency signal, and the suppression signal is a high-frequency signal.20. The system according to aspect 19, wherein an amplitude of the stimulation signal varies with a frequency in the range of 0.1-100 Hz and wherein an amplitude of the suppression signal varies with a frequency in the range of 1-10 kHz.21. The system according to any of the preceding aspects, further comprising: a sensor device configured to generate a sensor signal indicating an effector response in the effector tissue; wherein the control unit is configured to: receive the sensor signal, and control an operation of the stimulation device based at least in part on the sensor signal.22. The system according to aspect 21, wherein the sensor device comprises a sensor electrode configured to measure an electric activity in the effector tissue in response to the stimulation signal.23. The system according to aspect 21, wherein the sensor device comprises a sensor electrode configured to measure a change in electrical impedance in the effector tissue in response to the stimulation signal.24. The system according to aspect 21, wherein sensor device comprises an electromyographic sensor configured to measure an electric activity in the effector tissue and an electric impedance sensor configured to measure a change in electrical impedance in the effector tissue. Aspect group 460PC: Stimulation_Electrical_General_Parasympathetic/Sympathetic1. A system for affecting an effector response in a patient, comprising: a stimulation device configured to deliver, directly or indirectly: a first stimulation signal to a sympathetic nerve innervating a first effector tissue of the patient, and a second stimulation signal to a parasympathetic nerve innervating a second effector tissue; the system further comprising: a control unit configured to control an operation of the stimulation device such that: the first stimulation signal stimulates an activity of the sympathetic nerve and the second stimulation signal inhibits an activity of the parasympathetic nerve, or the first stimulation signal inhibits an activity of the sympathetic nerve and the second stimulation signal stimulates an activity of the parasympathetic nerve, wherein the system comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall..2. A system for affecting an effector response in a patient, comprising: a stimulation device configured to deliver, directly or indirectly: a first stimulation signal to a sympathetic nerve innervating a first effector tissue of the patient, and a second stimulation signal to a parasympathetic nerve innervating a second effector tissue; the system further comprising: a control unit configured to control an operation of the stimulation device such that: the first stimulation signal stimulates an activity of the sympathetic nerve and the second stimulation signal inhibits an activity of the parasympathetic nerve, or the first stimulation signal inhibits an activity of the sympathetic nerve and the second stimulation signal stimulates an activity of the parasympathetic nerve, wherein the system comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.3. A system for affecting an effector response in a patient, comprising: a stimulation device configured to deliver, directly or indirectly: a first stimulation signal to a sympathetic nerve innervating a first effector tissue of the patient, and a second stimulation signal to a parasympathetic nerve innervating a second effector tissue; the system further comprising: a control unit configured to control an operation of the stimulation device such that: the first stimulation signal stimulates an activity of the sympathetic nerve and the second stimulation signal inhibits an activity of the parasympathetic nerve, or the first stimulation signal inhibits an activity of the sympathetic nerve and the second stimulation signal stimulates an activity of the parasympathetic nerve, wherein the system comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.4. A system for affecting an effector response in a patient, comprising: a stimulation device configured to deliver, directly or indirectly: a first stimulation signal to a sympathetic nerve innervating a first effector tissue of the patient, and a second stimulation signal to a parasympathetic nerve innervating a second effector tissue; the system further comprising: a control unit configured to control an operation of the stimulation device such that: the first stimulation signal stimulates an activity of the sympathetic nerve and the second stimulation signal inhibits an activity of the parasympathetic nerve, or the first stimulation signal inhibits an activity of the sympathetic nerve and the second stimulation signal stimulates an activity of the parasympathetic nerve, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina.5. The system according to any one of the preceding aspects, wherein the control unit is configured to control the operation of the stimulation device such that at least one of the first stimulation signal and the second stimulation signal is a periodic signal including atleast one of: a variable frequency component, a variable duty cycle component, a variable amplitude component, and a variable pause component.6. The system according to any one of the preceding aspects, wherein: the first signal is a low-frequency signal configured to stimulate the activity of the sympathetic nerve and the second signal is a high-frequency signal configured to inhibit the activity of the parasympathetic nerve; or the first signal is a high-frequency signal configured to inhibit the activity of the sympathetic nerve and the second signal is a low-frequency signal configured to stimulate the activity of the parasympathetic nerve.7. The system according to aspect 6, wherein an amplitude of the low-frequency signal varies with a frequency in the range of 0.1- 100 Hz and wherein an amplitude of the high-frequency signal varies with a frequency in the range of 1-10 kHz.8. The system according to any of the preceding aspects, wherein at least one of the first and second stimulation signals comprises a series of pulses having a negative voltage relative to ground.9. The system according to aspect 5, wherein the control unit is configured to operate the stimulation device to generate a positive voltage pulse following one or more negative voltage pulses.10. The system according to any of the preceding aspects, wherein at least one of the first stimulation signal and the second stimulation signal is an electric signal or a vibrational signal.11. The system according to any of the preceding aspects, wherein the control unit is configured to operate the stimulation device to alternatingly apply the first stimulation signal to the sympathetic nerve and the second stimulation signal to the parasympathetic nerve.12. The system according to any of aspects 1-10, wherein the control unit is configured to operate the stimulation device to simultaneously apply the first stimulation signal to the sympathetic nerve and the second stimulation signal to the parasympathetic nerve.13. The system according to any of the preceding aspects, wherein the control unit is configured to control the operation of the stimulation device to generate an effector response being at least one of a muscular response and a glandular response.14. The system according to aspect 13, wherein: each of the first and second effector tissue is a muscular tissue; and the control unit is configured to control the operation of the stimulation device such that the first stimulation signal stimulates the activity of the sympathetic nerve and the second stimulation signal inhibits the activity of the parasympathetic nerve, thereby inducing contraction in the muscular tissue.15. The system according to aspect 13, wherein: each of the first and second effector tissue is a muscular tissue; and the control unit is configured to control the operation of the stimulation device such that the first stimulation signal inhibits the activity of the sympathetic nerve and the second stimulation signal stimulates the activity of the parasympathetic nerve, thereby inducing relaxation in the muscular tissue.16. The system according to aspect 14 or 15, wherein the first and second effector tissue is smooth muscle tissue.17. The system according to aspect 13, wherein the first and second effector tissue form part of a blood vessel, an intestine, or a urine bladder of the patient.18. The system according to any of the preceding aspects, further comprising: a sensor device configured to generate a sensor signal indicating an effector response in the effector tissue; a control unit configured to: receive the sensor signal, and control an operation of the stimulation device based at least in part on the sensor signal.19. The system according to aspect 18, wherein the sensor device comprises a sensor electrode configured to measure an electric activity in the effector tissue.20. The system according to aspect 18, wherein the sensor device comprises a sensor electrode configured to measure a change in electrical impedance in the effector tissue.21. The system according to aspect 18, wherein sensor device comprises an electromyographic sensor configured to measure an electric activity in the effector tissue and an electric impedance sensor configured to measure a change in electrical impedance in the effector tissue.22. The system according to aspect 19 or 20, wherein: the sensor electrode is configured to be arranged at the effector tissue; the sensor further comprises a reference electrode, and the sensor device is configured to generate the sensor signal based on an electrical interaction between the sensor electrode and the reference electrode.23. The system according to aspect 19, wherein the reference electrode is formed by a housing of the stimulation device or the sensor device.24. The system according to any of aspects 18-23, wherein the sensor device is configured to measure mechanical movement in the effector tissue.25. The system according to aspect 24, wherein the sensor device comprises a strain gauge configured to measure a contraction or relaxation of the effector tissue.26. The system according to any of aspects 18-25, wherein the control unit is configured to determine a response measure based on the sensor signal, the response measure being indicative of the effector response.27. The system according to aspect 26, wherein the control unit is configured to: compare the response measure with a predetermined reference measure; and control the stimulation device to: in response to the response measure being below the reference measure, increase an intensity of the first stimulation signal to stimulate the activity in the in the sympathetic nerve and/or increase an intensity of the second stimulation signal to inhibit the activity of the parasympathetic nerve, and in response to the response measure exceeding the reference measure, reduce the intensity of the first stimulation signal to inhibit the activity of the sympathetic nerve and/or stimulate the activity of the parasympathetic nerve.28. The system according to aspect 27, wherein the predetermined reference measure is based on a previous measurement of the effector response in the patient.29. The system according to aspect 27 or 28, wherein the predetermined reference measure is based on previous measurement of effector responses in other patients.30. The system according to any of aspect 26-29, wherein the control unit is configured to monitor the response measure of effector response over time, and to control the stimulation device based on a change rate in the effector response over time.31. The system according to any of aspects 26-29, wherein the control unit is configured to determine a calibration parameter of the stimulation device based on the response measure.32. The system according to any of the preceding aspects, wherein the stimulation device comprises a first electrode arrangement configured to be coupled to the sympathetic nerve to deliver the first stimulation signal and a second electrode arrangement configured to be coupled to the parasympathetic nerve to deliver the second stimulation signal.33. The system according to aspect 32, wherein the first electrode arrangement comprises a first stimulation electrode and a second stimulation electrode, the first stimulation electrode and the second stimulation electrode are configured to be spaced apart along the sympathetic nerve. 34. The system according to aspect 32 or 33, wherein the stimulation device is configured to generate the first stimulation signal such that the first stimulation electrode serves as a cathode and the second stimulation electrode serves as an anode.35. The system according to any of aspects 32-34, further comprising a cuff configured to be at least partially arranged around thenerve and to hold the first electrode arrangement in place against the sympathetic nerve.36. The system according to any of aspects 32-35, wherein the second electrode arrangement comprises a third electrode and a fourth electrode, the third electrode and the fourth electrode being configured to be arranged spaced apart along the parasympathetic nerve.37. The system according to aspect 36, wherein the second electrode arrangement further comprises a fifth electrode configured to be arranged spaced apart from the fourth electrode such that the fourth electrode is arranged between the third and fifth electrodes.38. The system according to aspect 37, wherein the stimulation device is configured to generate the second stimulation signal such that the fourth electrode serves as a cathode and the third and fifth electrodes serve as anodes.39. The system according to any of aspects 32-38, further comprising a cuff configured to be at least partially arranged around the parasympathetic nerve and to hold the second electrode arrangement in place against the parasympathetic nerve. Aspect group 461SE: Stimulation_Electrical_General_Frequency for tissue1. A system for affecting an effector response in a patient, comprising: a stimulation device configured to be coupled to at least one of an effector tissue and a nerve innervating the effector tissue of the patient; a control unit configured to operate the stimulation device to apply at least one of a first stimulation signal and a second stimulation signal to the effector tissue; wherein the first stimulation signal is a time-varying signal with an amplitude varying with a frequency lying in a first frequency interval; wherein the second stimulation signal is a time-varying signal with an amplitude varying with a frequency lying in a second frequency interval; wherein the first frequency interval is selected to inducing the effector response in the effector tissue; and wherein the second frequency interval is selected to inhibit the effector response in the effector tissue, wherein the system comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomachand/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall.2. A system for affecting an effector response in a patient, comprising: a stimulation device configured to be coupled to at least one of an effector tissue and a nerve innervating the effector tissue of the patient; a control unit configured to operate the stimulation device to apply at least one of a first stimulation signal and a second stimulation signal to the effector tissue; wherein the first stimulation signal is a time-varying signal with an amplitude varying with a frequency lying in a first frequency interval; wherein the second stimulation signal is a time-varying signal with an amplitude varying with a frequency lying in a second frequency interval; wherein the first frequency interval is selected to inducing the effector response in the effector tissue; and wherein the second frequency interval is selected to inhibit the effector response in the effector tissue, wherein the system comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.3. A system for affecting an effector response in a patient, comprising: a stimulation device configured to be coupled to at least one of an effector tissue and a nerve innervating the effector tissue of the patient; a control unit configured to operate the stimulation device to apply at least one of a first stimulation signal and a second stimulation signal to the effector tissue; wherein the first stimulation signal is a time-varying signal with an amplitude varying with a frequency lying in a first frequency interval; wherein the second stimulation signal is a time-varying signal with an amplitude varying with a frequency lying in a second frequency interval; wherein the first frequency interval is selected to inducing the effector response in the effector tissue; and wherein the second frequency interval is selected to inhibit the effector response in the effector tissue, wherein the system comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.4. A system for affecting an effector response in a patient, comprising: a stimulation device configured to be coupled to at least one of an effector tissue and a nerve innervating the effector tissue of the patient; a control unit configured to operate the stimulation device to apply at least one of a first stimulation signal and a second stimulation signal to the effector tissue; wherein the first stimulation signal is a time-varying signal with an amplitude varying with a frequency lying in a first frequency interval; wherein the second stimulation signal is a time-varying signal with an amplitude varying with a frequency lying in a second frequency interval; wherein the first frequency interval is selected to inducing the effector response in the effector tissue; and wherein the second frequency interval is selected to inhibit the effector response in the effector tissue, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina.5. The system according to any one of the preceding aspects, wherein the first frequency interval is 0.1-100 Hz and the secondfrequency interval is 1-10 kHz.6. The system according to any of the preceding aspects, wherein at least one of the first and second stimulation signals is an electric signal comprising a series of pulses having a negative voltage relative to ground.7. The system according to aspect 6, wherein the control unit is configured to operate the stimulation device to generate a positive voltage pulse following one or more negative voltage pulses.8. The system according to aspect 6 or 7, wherein the control unit is configured to operate the stimulation device to generate a first stimulation signal having a frequency of 0.5-3 Hz, and wherein the efferent tissue is cardiac muscle tissue.9. The system according to aspect 6 or 7, wherein the control unit is configured to operate the stimulation device to generate a first stimulation signal having a frequency of 1-10 Hz, and wherein the efferent tissue is skeletal muscle tissue.10. The system according to aspect 6 or 7, wherein the control unit is configured to operate the stimulation device to generate a first stimulation signal having a frequency of 0.1-100 Hz, and wherein the efferent tissue is smooth muscle tissue.11. The system according to any one of aspects 1-4, wherein at least one of the first stimulation signal and the second stimulation signal is an electric signal or a vibrational signal.12. The system according to any of the preceding aspects, wherein the control unit is configured to operate the stimulation device to alternatingly apply the first stimulation signal and the second stimulation signal to the effector tissue.13. The system according to any of the preceding aspects, further comprising: a sensor device configured to generate a sensor signal indicating an effector response in the effector tissue; wherein the control unit is further configured to: receive the sensor signal, and control an operation of the stimulation device based at least in part on the sensor signal.14. The system according to aspect 13, wherein the sensor device comprises a sensor electrode configured to measure an electric activity in the effector tissue.15. The system according to aspect 14, wherein the sensor device comprises a sensor electrode configured to measure a change in electrical impedance in the effector tissue.16. The system according to aspect 13, wherein sensor device comprises an electromyographic sensor electrode configured tomeasure an electric activity in the effector tissue and an electric impedance sensor electrode configured to measure a change in electrical impedance in the effector tissue.17. The system according to aspect 14 or 15, wherein: the sensor electrode is configured to be arranged at the effector tissue; the sensor further comprises a reference electrode, and the sensor device is configured to generate the sensor signal based on an electrical interaction between the sensor electrode and the reference electrode.18. The system according to aspect 17, wherein the reference electrode is formed by a housing of the stimulation device or the sensor device.19. The system according to any of aspects 13-18, wherein the sensor device is configured to measure mechanical movement in the effector tissue.20. The system according to aspect 19, wherein the sensor device comprises a strain gauge configured to measure a contraction or relaxation of the effector tissue.21. The system according to any of aspects 13-20, wherein the control unit is configured to determine a response measure based on the sensor signal, the response measure being indicative of the effector response.22. The system according to aspect 21, wherein the control unit is configured to: compare the response measure with a predetermined reference measure; and control the stimulation device to: in response to the response measure being below the reference measure, increase an intensity of the first stimulation signal to stimulate the activity in the in the effector tissue, and in response to the response measure exceeding the reference measure, increase the intensity of the second stimulation signal to inhibit the activity of the effector tissue.23. The system according to aspect 22, wherein the predetermined reference measure is based on a previous measurement of the effector response in the patient.24. The system according to aspect 22 or 23, wherein the predetermined reference measure is based on previous measurement of effector responses in other patients.25. The system according to any of aspect 21-24, wherein the control unit is configured to monitor the response measure of effector response over time, and to control the stimulation device based on a change rate in the effector response over time.26. The system according to any of aspects 21-24, wherein the control unit is configured to determine a calibration parameter of the stimulation device based on the response measure.27. The system according to any of the preceding aspects, wherein the stimulation device comprises a first electrode arrangement configured to deliver the first stimulation signal and a second electrode arrangement configured to deliver the second stimulation signal.28. The system according to aspect 27, wherein the first electrode arrangement comprises a first stimulation electrode and a second stimulation electrode, the first stimulation electrode and the second stimulation electrode are configured to be spaced apart along the nerve innervating the effector tissue. 29. The system according to aspect 27 or 28, wherein the stimulation device is configured to generate the first stimulation signal such that the first stimulation electrode serves as a cathode and the second stimulation electrode serves as an anode.30. The system according to any of aspects 27-29, further comprising a cuff configured to be at least partially arranged around the nerve and to hold the first electrode arrangement in place against the nerve.31. The system according to any of aspects 27-30, wherein the second electrode arrangement comprises a third electrode and a fourth electrode, the third electrode and the fourth electrode being configured to be arranged spaced apart along the nerve.32. The system according to aspect 31, wherein the stimulation device is configured to generate the second stimulation signal such that the third electrode serves as a cathode and the fourth electrodes serves as an anode.33. The system according to any of aspects 27-32, further comprising a cuff configured to be at least partially arranged around the nerve and to hold the second electrode arrangement in place against the nerve.34. The system according to any of the preceding aspects, further comprising: a suppression electrode arrangement configured to be coupled to the nerve to apply a suppression signal suppressing action potentials propagating in the nerve in a direction towards the central nervous system.35. The system according to aspect 34, wherein the control unit is configured to regulate the suppression signal so as to suppress the action potentials induced in response to the stimulation device applying the first stimulation signal.36. The system according to aspect 34 or 35, wherein stimulation device is configured to be coupled to the nerve at a position between the effector tissue and the suppression electrode arrangement, so as to induce action potentials travelling in the nerve in a direction towards the effector tissue.37. The system according to any of aspects 34-36, wherein the control unit is configured to regulate the suppression of the action potentials so as to inhibit an undesired response of the nervous system of the patient, the undesired response being generated responsive to the stimulation device applying the first stimulation signal.38. The system according to any of aspects 34-37, wherein the control unit is configured to drive the stimulation device and the suppression electrode arrangement such that each of the stimulation device and the suppression electrode arrangement is actuated in sequence, with a delay of the suppression signal timed to generally match a conduction velocity of the first stimulation signal.39. The system according to any of aspects 34-37, wherein the control unit is configured to drive the stimulation device and the suppression electrode arrangement to apply the first stimulation signal and the suppression signal substantially at the same time.40. The system according to any of aspects 34-39, wherein the control unit is configured to drive the stimulation device and the suppression electrode arrangement such that each of the first stimulation signal and the suppression signal is a time-varying signal, wherein the first stimulation signals is a low-frequency signal, and the suppression signal is a high-frequency signal.41. The system according to any of aspects 34-40, wherein an amplitude of the first stimulation signal varies with a frequency in the range of 0.1-100 Hz and wherein an amplitude of the suppression signal varies with a frequency in the range of 1-10 kHz. Aspect group 463SE: Stimulation_Electrical_General_Unidirectional1. A system for affecting an effector response in a patient, comprising: a stimulation device comprising a first and a second electrode arrangement, each configured to be coupled to at least one of an effector tissue and a nerve innervating the effector tissue of the patient; a control unit configured to drive the stimulation device to apply, by means of the first electrode arrangement, a stimulation signal inducing the effector response in the effector tissue, and to apply, by means of the second electrode arrangement, a suppression signal suppressing action potentials propagating in the nerve towards the central nervous system, CNS; wherein the control unit is configured to regulate the suppression signal so as to suppress the action potentials induced in response to the stimulation device applying the stimulation signal, wherein the system comprises a system for treating obesity in a patient, comprising: an implantable vibration device (110) configured to vibrate and thereby stimulate an appetite controlling portion of the stomach and/or intestine wall of the of the patient, wherein the implantable vibration device is configured to be at least partially invaginated by the tissue of the stomach wall or the intestine wall.2. A system for affecting an effector response in a patient, comprising: a stimulation device comprising a first and a second electrode arrangement, each configured to be coupled to at least one of an effector tissue and a nerve innervating the effector tissue of the patient; a control unit configured to drive the stimulation device to apply, by means of the first electrode arrangement, a stimulation signal inducing the effector response in the effector tissue, and to apply, by means of the second electrode arrangement, a suppression signal suppressing action potentials propagating in the nerve towards the central nervous system, CNS; wherein the control unit is configured to regulate the suppression signal so as to suppress the action potentials induced in response to the stimulation device applying the stimulation signal, wherein the system comprises a system for generating a celiac vagus nerve response in a patient, comprising: a vibration device configured to deliver vibrations to the stomach tissue of a patient; a sensor device configured to generate a sensor signal indicating an celiac vagus nerve response to the delivered vibrations; a control unit configured to: receive the sensor signal, and control an operation of the vibration device based at least in part on the sensor signal.3. A system for affecting an effector response in a patient, comprising: a stimulation device comprising a first and a second electrode arrangement, each configured to be coupled to at least one of an effector tissue and a nerve innervating the effector tissue of the patient; a control unit configured to drive the stimulation device to apply, by means of the first electrode arrangement, a stimulation signal inducing the effector response in the effector tissue, and to apply, by means of the second electrode arrangement, a suppression signal suppressing action potentials propagating in the nerve towards the central nervous system, CNS; wherein the control unit is configured to regulate the suppression signal so as to suppress the action potentials induced in response to the stimulation device applying the stimulation signal, wherein the system comprises an implantable vibration device comprising a vibration generating unit (VGU) configured to cause the implantable vibration device to vibrate, wherein the vibration generating unit comprises at least one piezoelectric material, and a casing enclosing at least the vibration generating unit.4. A system for affecting an effector response in a patient, comprising: a stimulation device comprising a first and a second electrode arrangement, each configured to be coupled to at least one of an effector tissue and a nerve innervating the effector tissue of the patient; a control unit configured to drive the stimulation device to apply, by means of the first electrode arrangement, a stimulation signal inducing the effector response in the effector tissue, and to apply, by means of the second electrode arrangement, a suppression signal suppressing action potentials propagating in the nerve towards the central nervous system, CNS; wherein the control unit is configured to regulate the suppression signal so as to suppress the action potentials induced in response to the stimulation device applying the stimulation signal, wherein the implantable medical device comprises an implantable vibration device (10a) configured to vibrate and thereby stimulate sexually responsive tissue of the vulva or the wall of the vagina, wherein the implantable vibration device is configured to be implanted in the region of sexually responsive tissue in the vulva or the wall or the vagina.5. The system according to any one of the preceding aspects, wherein the first electrode arrangement is configured to be coupledto the nerve at a position between the effector tissue and the second electrode, so as to induce action potentials travelling in the nerve in a direction towards the effector tissue.6. The system according to aspect 5, wherein the control unit is configured to regulate the suppression of the action potentials soas to inhibit an undesired response of the nervous system of the patient, the undesired response being generated responsive to the first electrode applying the stimulation signal.7. The system according to aspect 5 or 6, wherein the control unit is configured to drive the stimulation device such that each of the first and second electrode arrangements are actuated in sequence, with a delay of the suppression signal timed to generally match a conduction velocity of the stimulation signal.8. The system according to any of aspects 1 to 6, wherein the control unit is configured to drive the stimulation device to apply the stimulation signal and the suppression signal substantially at the same time.9. The system according to any of the preceding aspects, wherein the control unit is configured to drive the stimulation device such that each of the stimulation signal and the suppression signal is a time-varying signal, wherein the stimulation signal is a low-frequency signal, and the suppression signal is a high-frequency signal.10. The system according to aspect 9, wherein an amplitude of the stimulation signal varies with a frequency in the range of 0.1-100 Hz and wherein an amplitude of the suppression signal varies with a frequency in the range of 1-10 kHz.11. The system according to any of the preceding aspects, wherein the first and second electrode arrangements are configured to be spaced apart along the nerve.12. The system according to any of the preceding aspects, wherein the first electrode arrangement comprises a first stimulation electrode and a second stimulation electrode configured to apply the stimulation signal to the effector tissue or the nerve. 13. The system according to aspect 12, wherein the first stimulation electrode and the second stimulation electrode are configured to be spaced apart along the nerve. 14. The system according to aspect 12 or 13, wherein the stimulation device is configured to generate the stimulation signal such that the first stimulation electrode serves as a cathode and the second stimulation electrode serves as an anode.15. The system according to any of the preceding aspects, further comprising a cuff configured to be at least partially arranged around the nerve and to hold the first electrode arrangement in place against the nerve.16. The system according to any of the preceding aspects, wherein the second electrode arrangement comprises a first suppression electrode and a second suppression electrode configured to apply the suppression signal to the nerve.17. The system according to aspect 16, wherein the first suppression electrode and the second suppression electrode are configured to be spaced apart along the nerve.18. The system according to aspect 16 or 17, wherein the second electrode arrangement further comprises a third suppression electrode configured to be arranged spaced apart from the second suppression electrode such that the second suppression electrode is arranged between the first and third suppression electrodes.19. The system according to aspect 18, wherein the stimulation device is configured to generate the suppression signal such that the second suppression electrode serves as a cathode and the first and third suppression electrodes serve as anodes.20. The system according to any of aspects 16-19, further comprising a cuff configured to be at least partially arranged around the nerve and to hold the second electrode arrangement in place against the nerve.21. The system according to any of the preceding aspects, further comprising: a sensor device configured to generate a sensor signal indicating an effector response in the effector tissue; wherein the control unit is further configured to: receive the sensor signal, and control an operation of the stimulation device based at least in part on the sensor signal.22. The system according to aspect 21, wherein the sensor device comprises a sensor electrode configured to measure an electric activity in the effector tissue.23. The system according to aspect 21, wherein the sensor device comprises a sensor electrode configured to measure a change in electrical impedance in the effector tissue.24. The system according to aspect 21, wherein sensor device comprises an electromyographic sensor electrode configured to measure an electric activity in the effector tissue and an electric impedance sensor electrode configured to measure a change in electrical impedance in the effector tissue.25. The system according to aspect 22 or 23, wherein: the sensor electrode is configured to be arranged at the effector tissue; the sensor further comprises a reference electrode, and the sensor device is configured to generate the sensor signal based on an electrical interaction between the sensor electrode and the reference electrode.26. The system according to aspect 25, wherein the reference electrode is formed by a housing of the stimulation device or the sensor device.29. The system according to any of aspects 21-26, wherein the sensor device is configured to measure mechanical movement in the effector tissue.28. The system according to aspect 27, wherein the sensor device comprises a strain gauge configured to measure a contraction or relaxation of the effector tissue.29. The system according to any of aspects 21-26, wherein the control unit is configured to determine a response measure based on the sensor signal, the response measure being indicative of the effector response.30. The system according to aspect 29, wherein the control unit is configured to: compare the response measure with a predetermined reference measure; and control the stimulation device to: in response to the response measure being below the reference measure, increase an intensity of the stimulation signal to stimulate the activity in the in the effector tissue, and in response to the response measure exceeding the reference measure, reduce the intensity of the stimulation signal to inhibit the activity of the effector tissue.31. The system according to aspect 30, wherein the predetermined reference measure is based on a previous measurement of the effector response in the patient.32. The system according to aspect 29 or 30, wherein the predetermined reference measure is based on previous measurement of effector responses in other patients.33. The system according to any of aspect 29-32, wherein the control unit is configured to monitor the response measure of effector response over time, and to control the stimulation device based on a change rate in the effector response over time.34. The system according to any of aspects 29-32, wherein the control unit is configured to determine a calibration parameter of the stimulation device based on the response measure.