Conduit removes damping deviceTechnical Field
The invention relates to the technical field of medical equipment, in particular to a catheter movement drag reduction device.
Background
In the interventional operation process, devices such as a catheter, a sheath, a guide wire and the like are used for reaching a target area through a blood vessel, in actual operation, a blood vessel path often has a bending branch shape, the devices can be pressed into a bending shape by the blood vessel wall, the mutual extrusion can increase the friction force between the devices and the blood vessel wall, the friction force can help to fix the devices, but the devices can also be prevented from advancing and retreating and steering in a body, so that the target area is difficult to reach. Some materials have a smaller friction force to increase the trafficability, but the stability is deteriorated.
Disclosure of Invention
The invention aims to provide a catheter moving drag reduction device which has the effects that the friction force between equipment and the wall of a blood vessel can be reduced when the equipment moves, the capacity of the equipment for passing through the blood vessel is enhanced, and the friction force is recovered when the equipment does not move, so that the equipment is fully fixed and the stability is maintained.
The technical aim of the invention is achieved by the following technical scheme that the drag reduction mechanism comprises a catheter and a drag reduction mechanism body, wherein the proximal end of the catheter of the drag reduction mechanism body is detachably connected, and the drag reduction mechanism body is used for generating vibration perpendicular to the length direction of the catheter.
The drag reduction mechanism is further characterized in that the drag reduction mechanism body comprises a shell, wherein a power supply module, a control module, a vibration module and a fixing assembly are sequentially arranged in the shell, and the fixing assembly is detachably connected with the guide pipe.
The vibration module is further arranged in the invention, the vibration module comprises a sleeve fixed in the shell, stators are symmetrically arranged in the sleeve, the stators are parallel to the axis of the sleeve, coils are wound on the stators, the axis of the coils is perpendicular to the axis of the sleeve, the two coils are electrically connected with the power supply module through the control module, the rotor is rotationally connected with the sleeve, the two coils respectively drive the rotor to rotate along the opposite direction, and the rotor is fixedly connected with the vibrating arm.
The fixing assembly is further arranged in the shell, the fixing assembly comprises a connecting part which is arranged in the shell and used for embedding the guide pipe, the connecting part is fixedly connected with a driving plate, the shell is provided with a through hole for embedding the driving plate, one end of the driving plate, which is positioned in the shell, is connected with the vibrating arm, a driving part is arranged at the joint of the driving plate and the vibrating arm, and the vibrating arm drives the connecting part to vibrate up and down through the driving part.
The invention is further arranged that the driving part comprises a gear fixedly connected to the output end of the vibrating arm, and the driving plate is provided with a rack which is meshed with the gear.
The connecting part is a C-shaped buckle, two parallel raised strips are arranged at the opening end of the C-shaped buckle, and the two raised strips are connected through a bolt.
The invention is further provided with a reinforcing ring at the joint of the conduit and the connecting part.
The invention is further provided that the conduit is lined with a metal mesh, the metal mesh is fixedly connected with a metal conducting bar, and the metal conducting bar is fixedly connected with the reinforcing ring.
The invention is further arranged that the proximal end of the catheter is provided with an operating handle, and the drag reduction mechanism body is arranged in the operating handle or can be connected to the proximal end of the catheter body in a detachable way.
The invention is further arranged that the control module is used for controlling the switch, the amplitude and the frequency of the vibration module.
The beneficial effects of the invention are as follows:
1. After the solid surface of the catheter enters the body, the solid surface of the catheter is contacted with the elastic surface of the body tissue, and the main factors for determining the friction force of the catheter are mainly two, namely, the longer the contact area is, the larger the contact area is when the catheter enters a blood vessel, and the friction force is increased, and the larger the contact pressure is, the larger the bending of the blood vessel is, the larger the deformation pressure is applied to the catheter, and the friction force is increased. The drag reduction mechanism body enables the catheter to vibrate vertically along the length direction of the catheter, so that the catheter body can vibrate with certain frequency and intensity, namely, the contact surface of the catheter and tissues can be separated in a short time at high frequency, the total contact area and contact pressure of the catheter and the blood vessels are reduced, and peristaltic advancing and steering of the catheter in elastic tissues are facilitated.
2. The vibration module consists of two stators which are symmetrically arranged and a rotor which is arranged between the two stators, the two stators can generate reverse magnetic attraction force to the rotor after being electrified, the rotor and the vibration arm which is fixed on the rotor can be driven to rotate forward and backward at high frequency through control voltage, the vibration arm is connected with the connecting part through the connecting rod, the forward and backward rotation of the vibration arm can be transmitted to the driving plate through the gear rack and the rack, the forward and backward rotation of the vibration arm can be converted into up-down vibration at high frequency through the gear rack mechanism, the connecting part is tightly connected with the guide pipe through the C-shaped buckle, and accordingly the high-frequency vibration of the connecting part can be transmitted to the guide pipe, and the guide pipe is driven to vibrate.
3. The reinforcing ring is arranged at the joint of the guide pipe and the connecting part, and can support the guide pipe, so that the guide pipe is prevented from deforming under the pressure of the connecting part, and the connecting part is favorably and tightly connected with the guide pipe.
4. The inner wall of the catheter is provided with the metal conducting strip which is fixedly connected with the reinforcing ring, so that the vibration at the proximal end of the catheter can be transmitted to the whole catheter.
5. The vibration control device has the advantages that the switch, the amplitude and the frequency of the vibration module can be controlled through the control module, when the catheter passes through the bending part and the follow-up advancing and retreating and steering operation is difficult, the drag reduction mechanism body is connected to the proximal end of the catheter, the vibration switch is turned on, the vibration intensity is adjusted from small to large, the response of equipment to operation is observed, if the response is insufficient, the intensity level is adjusted, the response degree is satisfactory, the operation of the guide wire is continued, after reaching a preset target area, the vibration switch can be turned off, and the equipment can recover the friction force between the equipment and the blood vessel, so that the equipment is fully fixed, and the stability of the equipment is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of the present embodiment.
Fig. 2 is an exploded view of the present embodiment.
FIG. 3 is a schematic diagram of the connection of a vibration module to a stationary assembly.
Fig. 4 is a schematic view of the internal structure of the vibration module.
Fig. 5 is a schematic cross-sectional view of a catheter at a stiffening ring.
In the figure, 1, a conduit, 2, an operating handle, 3, a drag reduction mechanism body, 31, a shell, 32, a vibration module, 321, a sleeve, 322, a stator, 323, a coil, 324, a rotor, 325, a vibrating arm, 33, a fixing component, 331, a connecting part, 331a, a buckle, 331b, a convex strip, 331c, a bolt, 332, a driving plate, 4, a through hole, 5, a driving part, 51, a rack, 52, a gear, 6, a reinforcing ring and 7, a metal guide bar.
Detailed Description
The technical scheme of the present invention will be clearly and completely described in connection with specific embodiments. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
The embodiment of the drag reduction device for the movement of the catheter 1 is shown in fig. 1, the drag reduction device comprises a catheter 1, an operating handle 2 is arranged at the proximal end of the catheter 1, a drag reduction mechanism body 3 is arranged on the catheter 1, the drag reduction mechanism body 3 is detachably connected with the proximal end of the catheter 1, the drag reduction mechanism body 3 comprises a shell 31, a power supply module, a control module, a vibration module 32 and a fixing assembly 33 are sequentially arranged in the shell 31, the fixing assembly 33 is detachably connected with the catheter 1, and the vibration module 32 drives the fixing assembly 33 to vibrate along the direction perpendicular to the length of the catheter 1.
As shown in fig. 2-4, the vibration module 32 includes a sleeve 321 fixed in the housing 31, a stator 322 is symmetrically disposed in the sleeve 321, the stator 322 is parallel to the axis of the sleeve 321, a coil 323 is wound on the stator 322, the axis of the coil 323 is perpendicular to the axis of the sleeve 321, the two coils 323 are electrically connected with the power supply module through the control module, the rotor 324 is rotationally connected with the sleeve 321, under the action of the control module, the coils 323 alternately generate opposite attractive force to the rotor 324 after being electrified, so that the rotor 324 is driven to rotate continuously and backwards, the vibration arm 325 is fixedly connected with the rotor 324, the vibration arm 325 can be driven to rotate continuously and forwards by rotating the rotor 324, the rotation amplitude of the vibration arm 325 can be changed by controlling the magnitude of voltage, the forward and reverse switching frequency of the vibration arm 325 can be changed by controlling the positive and negative switching frequency of the voltage, and the forward and reverse switching frequency of the vibration arm 325 can be adjusted within the range of 300-500 hz.
As shown in fig. 2 and 3, the fixing component 33 includes a connecting portion 331 disposed in the housing 31, the connecting portion 331 is a C-shaped buckle 331a, two parallel protruding strips 331b are disposed at an opening end of the C-shaped buckle 331a, the two protruding strips 331b are connected by a bolt 331C, the catheter 1 can be clamped in the C-shaped buckle 331a, and then the bolt 331C is tightened to lock the catheter 1 in the C-shaped buckle 331a, and the catheter 1 is tightly connected with the C-shaped buckle 331 a. The outer wall fixedly connected with drive plate 332 of C type buckle 331a, set up the through-hole 4 that supplies rack 51 embedding on the casing 31, drive plate 332 meets with the arm 325 through drive portion 5, drive portion 5 is including setting up the rack 51 of keeping away from C type buckle 331a one end at drive plate 332, be provided with gear 52 on the arm 325, when the arm 325 forward and backward rotates, gear 52 on the arm 325 drives rack 51 on the drive plate 332 along through-hole 4 up-and-down vibration, through gear 52 rack 51 mechanism, the high frequency forward and backward rotation of arm 325 can be converted into the high frequency up-and-down vibration of drive plate 332, thereby can drive the pipe 1 high frequency vibration that is located C type buckle 331 a. In the figure, the gear 52 and the rack 51 are schematically shown, and in the practical use process, the density of the gear 52 and the rack 51 can be adjusted, so that small-amplitude vibration of the vibration arm 325 can be accurately transmitted to the driving plate 332.
The bottom of the driving plate 332 can be provided with a spring, one end of the spring is fixed at the bottom of the driving plate 332, the other end of the spring is fixed in the shell 31, the elastic force of the spring drives the driving plate 332 to move away from the shell 31, the driving plate 332 can return at a higher speed under the action of the spring, and the vibration transmission effect is improved.
As shown in fig. 5, a reinforcing ring 6 is disposed at the joint of the catheter 1 and the C-shaped buckle 331a, and when the C-shaped conducting bar is connected with the catheter 1, the reinforcing ring 6 can support the catheter 1 to avoid deformation of the catheter 1. The inside lining of the catheter 1 is provided with a metal net, the metal net is fixedly connected with a metal conducting bar 7, the metal conducting bar 7 is fixedly connected with a reinforcing ring 6, the reinforcing ring 6 vibrates under the action of a C-shaped buckle 331a, and the metal conducting bar 7 connected to the reinforcing ring 6 can better transmit vibration to the whole part of the conducting bar.
The catheter 1 in the application can be replaced by interventional surgical instruments such as a guide wire, a catheter 1 sheath and the like.
The working principle of the movable drag reduction device of the catheter 1 is that after the solid surface of the catheter 1 enters a body, the solid surface of the catheter 1 is contacted with the elastic surface of organism tissues, and the main factors for determining the friction force of the solid surface are two, namely, the contact area is increased as the entering blood vessel is longer, the contact area is increased, the friction force is increased, and the contact pressure and the deformation pressure born by the catheter 1 are increased as the blood vessel is bent more. The drag reduction mechanism body 3 enables the catheter 1 to vibrate vertically along the length direction of the catheter 1, so that the catheter body can vibrate with certain frequency and intensity, namely, the contact surface of the catheter 1 and tissues can be separated temporarily at high frequency, the total contact area and contact pressure of the catheter 1 and the blood vessels are reduced, and peristaltic advancing and steering of the catheter 1 in elastic tissues are facilitated.
The vibration module 32 is composed of two stators 322 which are symmetrically arranged and a rotor 324 which is arranged between the two stators 322, the two stators 322 can generate reverse magnetic attraction force to the rotor 324 after being electrified, the rotor 324 and a vibration arm 325 fixed on the rotor 324 can be driven to rotate forward and backward at high frequency through positive and negative switching of control voltage, the vibration arm 325 is connected with a connecting part 331 through a driving part 5, vibration of the vibration arm 325 can be transmitted to the connecting part 331 through the driving part 5, the connecting part 331 is tightly connected with a catheter 1 through a C-shaped buckle 331a, vibration can be transmitted to the catheter 1, so that the catheter 1 is driven to vibrate, and when the catheter 1 vibrates at high frequency, friction force between the catheter 1 and a blood vessel is reduced, so that the catheter 1 is beneficial to advancing and steering in the blood vessel.