Curved microwave ablation aciculiform antenna for treating fibroidTechnical field
The present invention relates to a kind of Curved microwave ablation aciculiform antenna for being used to treat fibroid, belong to microwave melt needleTechnical field.
Background technology
Fibroid is a kind of hormone-dependent neoplasm, and estrogen is the principal element for promoting myomata to grow, growth hormone,Human placental prolactin can cooperate with estrogen to promote Uterine Smooth Cell mitosis, and therefore, fibroid is more common in reproduction age, nothingSexual life and the uncoordinated women of sexual life, gravidic fibroid can tachyauxesis.Fibroid can cause many clinicsHarm, such as uterine hemorrhage, hyper-menorrhea, menostaxis, abdominal mass and pressure symptom, dysmenorrhoea, and anaemia etc., is also infertileWith the main cause of miscarriage.Clinical treatment demand is quite varied.Surgery excision myomata or uterus are still common treatment method,But the shortcomings of having wound big, or be unable to Reservations uterus.Increasingly mature in minimally-invasive treatment technology, especially country is on double only twoToday that tire policy will be opened, protection uterus is significant.The radio-frequency ablation technique of Via vagina is treated in fibroidField is had been achieved with more successfully applying, but the advantage for how combining microwave ablation techniques is still needed to be studied.MicrowaveThough the existing Preliminary Applications of ablation fibroid, existing microwave ablation antenna is unfavorable for Via vagina to be carried out from uterine cavity faceTreatment, not only artificially destroys perimetric integrality through abdomen puncture microwave ablation, also easily causes neighbouring intestinal tube, wingGuang is damaged, it is therefore necessary to develop Via vagina, the microwave ablation aciculiform antenna treated from uterine cavity.
The content of the invention
The technical problems to be solved by the invention are to overcome the disadvantages mentioned above of prior art to be used to treat son there is provided one kindThe Curved microwave ablation aciculiform antenna of palace myomata, Via vagina is not suitable for from palace to expect to solve microwave melt needle in the prior artCavity surface is treated, and can not meet the technical problems such as different size of fibroid focus treatment.
In order to solve the above technical problems, the Curved microwave ablation aciculiform provided by the present invention for treating fibroidAntenna, including：Syringe needle, shank, coaxial cable, aqueduct and chokes ring, antenna have the chamber for accommodating coaxial cable and aqueductRoom, is provided with inlet channel between aqueduct and coaxial cable, backwater road is provided between aqueduct and shank；It is characterized in that：The chamber and aqueduct extend forwardly into the front end of antenna, and the launch window of antenna is at least part of to be located in aqueduct, is madeCooling medium can cool to the launch window region of antenna；The aqueduct in Microwave emission region is that microwave can penetrate materialMatter, enables microwave outwards to radiate, and the remainder of aqueduct is micro-wave screening material；Chokes ring on rear side of emitting areaFixed with the diversion seal of tube, make chokes ring play a part of stopping microwave, there is gap between chokes ring and shank, the gap is usedIn the backflow of cooling medium；The sheath pin of slidable micro-wave screening material, the shank of the antenna, diversion are cased with outside the shankPipe and coaxial cable are deflection.
Antenna mast body is processed into using flexible material so that ablation antenna is suitable for vagina and son during useThe physiological bending in palace, directly can enter uterus from vagina and carry out myomata ablation, it is to avoid the perimetrium that abdomen puncture is causedIntegrity violations, and neighbouring intestinal tube, trauma of bladder, and can aid in puncturing flesh in the sheath pin for being arranged on antenna mast body front endKnurl, and relative motion is carried out by sheath pin and syringe needle, and then change the physical length of syringe needle transmitting terminal, it is different size of to adapt toMyomata melts.The launch window of antenna is arranged in aqueduct by the present invention so that cooling medium（Water）Can be to antenna front endsCooled, prevent the tumor tissues of high-temperature area from carbonization or coking, Jie of high-temperature area tumor tissues occurring in a short timeElectrostrictive coefficient change is small, so that microwave wavelength is basicly stable in surgical procedure, its climbing capacity is weak, coordinates chokes ring can be rightIt is suppressed, " proper circle " coefficient（Minor axis/major diameter）Reach 0.95.
Brief description of the drawings
The present invention is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is antenna schematic diagram of the embodiment of the present invention.
Fig. 2 is Fig. 1 A areas amplification view.
Label is schematically as follows in figure：1- shanks, 2- coaxial cables, 3- pole pieces, 4- syringe needles, 5- antenna launch windows, 6- drawsWater pipe, the son pipes of 61- first, the son pipes of 62- second, 7- chokes rings, 8- takes out reservoir channel, 10- handles, 11- intake antrums, 12- water outletsChamber, 13- sheath pins, 14- radio frequency (RF) coaxial connectors, 15- water inlet pipes, 16- outlet pipes.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present inventionIn accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described.
As shown in Figure 1 and Figure 2, the present embodiment is used for the Curved microwave ablation aciculiform antenna for treating fibroid, including：Handle 10, syringe needle 4, shank 1, coaxial cable 2, aqueduct 6 and chokes ring 7, antenna, which has, accommodates coaxial cable 2 and aqueduct 6Chamber, be provided with inlet channel between aqueduct 6 and coaxial cable 2,（It is recommended that between utilizing between aqueduct 6 and coaxial cable 2Gap is used as inlet channel）, backwater road is provided between aqueduct 6 and shank 1（It is recommended that utilizing the gap between aqueduct 6 and shank 1It is used as backwater road）.As shown in Fig. 2 syringe needle 4（Zirconium dioxide tartar）Pole piece is provided with blind hole with opening backwards, blind hole3, the inner wire of coaxial cable 2 is connected with pole piece 3（It is conductively connected）, antenna hair is formed between pole piece 3 and coaxial cable outer conductor 2Penetrate window 5.Cavity is formed between the hole wall and pole piece 3, coaxial cable outer conductor 2 of blind hole, the front end of aqueduct is close or props upThe bottom of the blind hole so that the launch window 5 of antenna（It is at least part of）In aqueduct, so that cooling medium canThe launch window region of antenna is cooled.In this example, by aqueduct, cooling medium is drained to antenna foremost, fromAnd microwave radiation central area can be cooled down.Slidable micro-wave screening material is cased with outside shank 1（Stainless steel,Copper or copper alloy）Sheath pin 13.In order to enable the antenna to bending, vagina and the physiological bending in uterus, the pin of antenna are adapted toBar, aqueduct and coaxial cable is deflections, and sheath pin 13 also can be using can flexing material, or half just material, such as stainless steel.Sheath pin 13 is shorter, on the one hand provides certain rigidity to puncture and ensures, another aspect, by adjusting the position of sheath pin 13, can be withAdjust the length of antenna emitting area（Microwave is sent from the needle portion for exposing sheath pin 13, and remaining is then shielded by sheath pin 13）.PinBar and aqueduct back segment can select copper alloy, and flexible coaxial cable then may be selected in coaxial cable.As shown in figure 1, in handle 10The radio frequency (RF) coaxial connector 14 being connected with coaxial cable is fixed with, the intake antrum 11 being connected with inlet channel is connected with water outletWater chamber 12.Water inlet pipe 15 and outlet pipe 16 are extended with from the lower end of handle 10, the front end connection intake antrum 11 of water inlet pipe 15 goes outThe front end connection water chamber 12 of water pipe 16.
In view of the pathological characters of fibroid, the maximum outside diameter of above-mentioned antenna shank 1 may be configured as 1.8 to 3 millisRice, such as 2.1 millimeters.
For make ablation needle front end under ultrasound and radioactive ray can clearer development, can also at least front end of shank 1 andThe surface of syringe needle 4 is coated with polytetrafluorethylecoatings coatings., can also be in polytetrafluorethylecoatings coatings simultaneously in order to ensure the effect developedMiddle addition aluminium powder.
Because the quality of myomata is generally harder, during microwave ablation is carried out, sheath pin 13 is first moved to shank1 punctured foremost, is then moved rearwards by sheath pin 13, is punctured again to myomata by microwave melt needle, utilizes sheath pinThe change of 13 retrogressing length, changes the length at Microwave emission end, to adapt to different size of myomata, and that effectively widens such disappearsMelt the application of aciculiform antenna.
As shown in Fig. 2 in the present embodiment, aqueduct 6 is with the first sub- pipe 61 close to syringe needle and second away from syringe needleSub- pipe 62, the first sub- pipe 61 is isolation material, can select polyvinyl chloride（PVC）Or polytetrafluoroethylene (PTFE)（PTFE）Deng making microwaveCan be to external radiation, its rear portion is tightly connected with the second sub- pipe 61, it is ensured that cooling medium is fed forward；Second sub- pipe 62 is metalMaterial, can select copper alloy；Its front portion is fixed with the sealing welding of chokes ring 7, makes chokes ring play a part of stopping microwave；ChokesThere is gap between ring and shank, the gap is used for the backflow of cooling medium.In Fig. 2, the arrow in antenna chamber represents coolingThe flow direction of medium.
Originally apply in example, the first sub- pipe 61 and second sub- pipe 62 sealing docking of aqueduct 6, chokes ring 7 is set in the second sonPipe 62, and sealing welding fixes.Aqueduct can also use other assembling structures with chokes ring, for example：
1st, the first sub- pipe 62 of sub- pipe 61 and second is individually fixed in the rear and front end of chokes ring 7；
2nd, the endoporus of the first sub- pipe insertion chokes ring 7 carries out sealing fixation；The second sub- sealing welding of pipe 62 is in after chokes ring 7End.
3rd, chokes ring 7 is set in the second sub- pipe 62, and the first sub- pipe 61 inserts the front portion of the second sub- pipe 62.
In addition to the implementation, the present invention can also have other embodiment.All use equivalent substitution or equivalent transformation shapeInto technical scheme, all fall within the protection domain of application claims.