CN117442248A - Gun-retreating type biopsy ablation gun and biopsy ablation method - Google Patents

Abstract

The invention discloses a gun withdrawal type biopsy ablation gun which comprises a gear unit, a firing unit, a sampling unit, an ablation unit and a gun body shell, wherein the ablation unit is detachably connected to the gun body shell, the gear unit is used for driving the sampling unit to move along the inside of the gun body shell, and the firing unit is used for driving the sampling unit to eject along the direction extending out of the gun body shell; the ablation unit comprises an ablation assembly, a sleeve, a first rotary clamping assembly, an anti-rotation assembly and a first connecting piece, wherein the sleeve is detachably connected with the gun body shell, the first rotary clamping assembly is used for connecting the gun body shell with the sleeve, and the anti-rotation assembly is used for limiting relative rotation between the sleeve and the first connecting piece. The biopsy gun has the beneficial effects that the biopsy gun can realize two operations of sampling and ablation at the same time, and the biopsy gun does not need to be adopted for sampling and then re-penetrating the sampling part to perform the ablation operation.

Description

Gun-retreating type biopsy ablation gun and biopsy ablation method

Technical Field

The invention relates to the technical field of medical instruments for puncture biopsy, in particular to a gun-withdrawal type biopsy ablation gun.

Background

The biopsy gun is a common device used in biopsy puncture, and when in detection, the gun head of the biopsy gun is inserted into a part to be detected, and after the tissue to be detected is taken out, the biopsy gun is pulled out. For viscera or lesions with abundant blood supplies and easy bleeding, more abundant materials means more bleeding complications and greater risks. Meanwhile, if the sampling part is malignant tumor, the situation that malignant tissue infects healthy tissue is easy to cause during sampling.

In the prior art, a biopsy gun and an ablation gun are respectively adopted for independent operation, after biopsy is punctured, an ablation needle is secondarily inserted for ablation, so that pain of a patient is increased, the incidence rate of postoperative complications is increased, and meanwhile, if a biopsy sampling position is malignant tumor, diffusion is easily caused due to untimely treatment after biopsy sampling.

Disclosure of Invention

The invention aims to solve the problems, and designs a gun-retreating type biopsy ablation gun. The gun body comprises a gear unit, a firing unit, a sampling unit, an ablation unit and a gun body shell, wherein the ablation unit is detachably connected to the gun body shell, the gear unit is used for driving the sampling unit to move along the inside of the gun body shell, and the firing unit is used for driving the sampling unit to eject along the direction extending out of the gun body shell;

The ablation unit comprises an ablation assembly, a sleeve, a first rotary clamping assembly, an anti-rotation assembly and a first connecting piece, wherein the sleeve is detachably connected with the gun body shell, the first rotary clamping assembly is used for connecting the gun body shell with the sleeve, the first connecting piece is arranged inside the sleeve, and the anti-rotation assembly is used for limiting relative rotation between the sleeve and the first connecting piece.

Further, the sampling unit comprises an inner sampling assembly and an outer sampling assembly, the inner sampling assembly and the outer sampling assembly are coaxially arranged, the outer sampling assembly comprises an circumscribed pipe and a pipe fixing piece, and the circumscribed pipe is fixedly connected with the pipe fixing piece;

the inner sampling assembly comprises an inner core needle and a needle fixing piece, wherein the needle fixing piece is arranged in the gun body shell, the needle fixing piece can move along the gun body shell, the inner core needle is fixedly connected with the needle fixing piece, the diameter of the inner core needle is smaller than that of the circumscribed tube, the inner core needle and the circumscribed tube are coaxially arranged, and a sampling notch is formed in the tail end of the inner core needle.

Further, the first rotary clamping assembly comprises a first clamping block fixed at the end part of the gun body shell and a first clamping groove formed in the outer side wall of the sleeve, and the first clamping block is matched with the first clamping groove.

Further, prevent changeing the subassembly and include first connecting piece, second connecting piece, first prevent changeing piece, second prevent changeing piece, reset frame, reset elastic component and joint ring, can dismantle on the pipe mounting and be connected with first connecting piece, first connecting piece peg graft in the second connecting piece, first connecting piece with the second connecting piece is formed with sliding channel, second connecting piece is overhead to be equipped with reset frame and reset frame can follow sliding channel removes, reset frame both ends are fixed with reset button and reset elastic component respectively, and the joint ring cover is located the second connecting piece is outside and joint ring with sleeve pipe fixed connection.

Further, a connecting rod is fixed at one end of the first connecting piece inserted into the second connecting piece, a first anti-rotation block is fixed at the end part of the connecting rod, a clamping groove is formed in the second connecting piece, the first anti-rotation block is inserted into the clamping groove, a second anti-rotation block is fixed on the side wall of the reset frame, the first anti-rotation block and the second anti-rotation block are staggered in the first state, and the projection of the first anti-rotation block and the second anti-rotation block along the plane where the radial direction of the sleeve is located in the second state is provided with an overlapping part;

The first connecting piece is provided with a second clamping groove, the pipe fixing piece is fixedly provided with a second clamping block, and the second clamping block is matched with the second clamping groove.

Further, the ablation assembly comprises a conductive ring, an on-off switch and an ablation needle, the ablation needle is fixed at the end part of the tube fixing piece, the conductive ring is sleeved outside the ablation needle, the conductive ring is communicated with the radio frequency generator, and the on-off switch is arranged on the side wall of the sleeve.

Further, the firing unit comprises an ejection strip, a side firing part and a rear firing part, wherein the ejection strip is arranged inside the gun body shell and can slide along the gun body shell, the side firing part is fixedly connected with the ejection strip, the side firing part is arranged on the side part of the gun body shell, the rear firing part is arranged at the end part of the gun body shell, and the first firing buckle and the second firing buckle are rotatably connected with the gun body shell.

The side-firing part comprises a first button and a second button, the first button and the second button are fixed on the ejection strip, a first through hole and a second through hole are formed in the gun body shell, the first button penetrates through the first through hole, the second button penetrates through the second through hole, and the length of the first through hole is larger than that of the second through hole.

The back firing part comprises a third button, the third button is fixed at the end part of the ejection strip, and the third button penetrates through the gun body shell.

Further, the gun comprises a gun body shell, and is characterized by further comprising a mode switching unit, wherein the mode switching unit comprises a locking piece, an adjusting seat and a mode adjusting block, the adjusting seat is fixed in the gun body shell, the locking piece is accommodated in the adjusting seat, the third button is erected on the locking piece, a gear adjusting protrusion is fixed on the side wall of the locking piece, a plurality of concave structures matched with the gear adjusting protrusion are arranged on the adjusting seat, the mode adjusting block is fixed on the side part of the locking piece, and extends out of the gun body shell, and the mode adjusting block is used for adjusting the gear adjusting protrusion to be matched with the concave structures at different heights;

the concave structure comprises a first adjusting groove, a second adjusting groove and a third adjusting groove, and the locking piece is provided with a first positioning surface, a second positioning surface and a through hole;

when the gear adjusting protrusion is matched with the first adjusting groove, the third button is clamped on the first positioning surface, and the ejection strip is in an anti-false firing state;

when the gear adjusting protrusion is matched with the second adjusting groove, the third button is clamped on the first positioning surface so that the third button moves to a position clamped on the second positioning surface when the third button or the first button is pressed, and the ejection strip fires the inner sampling assembly;

When the gear adjusting protrusion is matched with the third adjusting groove, the third button passes through the through hole when the second button is pressed, and the ejection strip fires the outer sampling assembly;

when the gear adjusting protrusion is matched with the third adjusting groove, the third button passes through the through hole when being pressed, and the ejection strip sequentially fires the inner sampling assembly and the outer sampling assembly.

A biopsy ablation method is applied to the gun withdrawal type biopsy ablation gun, and comprises the following steps:

step one: and (3) assembling: assembling a sleeve of an ablation unit with a gun body shell, enabling an external cutting tube to extend into an ablation needle, rotating the gun body shell to simultaneously clamp a first clamping block into a first clamping groove, clamp a second clamping block into a second clamping groove, and enabling projections of a first anti-rotation block and a second anti-rotation block on planes of the sleeve along the radial direction to have overlapping parts;

step two: and (3) gear engagement: pressing the reset button to enable the first anti-rotation block and the second anti-rotation block to be staggered, so that the pipe fixing piece can move along the gun body shell during gear engagement, the plate moves the gear engagement shell to enable the moving plate to move in the shell, the first elastic piece and the second elastic piece are compressed, and the first push block and the second push block push the inner sampling assembly and the outer sampling assembly to move towards the direction extending into the gun body shell; when the first inclined surface at the end part of the moving plate is contacted with the second inclined surface at the bottom of the locking piece in the moving process, the gear adjusting protrusion is matched with the first adjusting groove, the third button is clamped on the first positioning surface, and the biopsy gun is in an anti-false firing state;

Step three: firing and sampling: the reset button is in a pressing state during the triggering sampling, the ejection strip is moved along the gun body shell through the side triggering part or the rear triggering part, the inner sampling assembly and the outer sampling assembly are sequentially triggered, the inner core needle is pricked into the tissue sample part during the triggering of the inner sampling assembly, and the outer sampling assembly cuts off the tissue sample outside the inner sampling assembly through the circumscribed tube during the triggering of the outer sampling assembly;

step four: gun withdrawal: the reset button is sprung back to the initial position, the projection of the plane where the first anti-rotation block and the second anti-rotation block are located along the radial direction of the sleeve is provided with an overlapped part, the first connecting piece is connected with the second connecting piece, the gun body shell is rotated to enable the first clamping block to be moved out of the first clamping groove, the second clamping block to be moved out of the second clamping groove, and the whole gun body shell is withdrawn from the sampling part;

step five: ablation: the on-off switch is pressed to electrify the conducting ring, the conducting ring increases the tissue temperature in the covered area, and the local cells are deactivated.

In the third step, the percussion sampling has a semiautomatic mode, which comprises the steps of firstly adjusting the height of a mode adjusting block to enable a gear adjusting protrusion to be matched with a second adjusting groove, pressing a first button or a third button, enabling a ejection bar to move along the outer shell of the gun body, firstly unlocking a needle fixing piece by the first percussion buckle, moving an inner core needle along the direction extending out of the outer shell of the gun body to prick a sampling part for sampling, further adjusting the height of the mode adjusting block to enable the gear adjusting protrusion to be matched with the third adjusting groove after the end part of the inner core needle is fully filled with sampling tissues, pressing the second button or the third button, enabling the ejection bar to continuously move along the outer shell of the gun body, unlocking the tube fixing piece by the second percussion buckle, and cutting off the sampling part along the outer part of the inner core needle by the circumscribed tube;

In the third step, the percussion sampling has full-automatic mode, including the height that the direct adjustment mode piece was adjusted to the mode is high makes gear adjustment protruding and third adjustment tank adaptation, presses second button or third button, and ejection strip removes along rifle body shell, and first percussion knot is detained with the second percussion and is released the locking of needle mounting and pipe mounting in proper order in succession, and the inner core needle moves the pricking sampling position along the direction of stretching out rifle body shell and takes a sample, and further circumscribes the pipe and cuts off the sampling position along the inner core needle outside.

The gun-retreating type biopsy ablation gun manufactured by the technical scheme of the invention has the following beneficial effects:

(1) The inner sampling assembly, the outer sampling assembly and the ablation needle are all coaxially arranged, the inner sampling assembly stretches into the outer sampling assembly, and the outer sampling assembly stretches into the ablation needle. During sampling, the inner core needle and the circumscribed tube are respectively fired in sequence and pricked into a sampling part for sampling; the gun body shell is rotated to enable the first clamping block and the first clamping groove to be free from limitation, the second clamping block and the second clamping groove to be free from limitation, the gun body shell is withdrawn from the sampling position and then is ablated by the ablation unit, the biopsy gun simultaneously realizes two operations of sampling and ablation, and the biopsy gun does not need to be independently used for sampling and then re-penetrating the sampling position to carry out ablation operation;

(2) According to different actual conditions of the sampling organ and the part, one mode of the firing operation through the side firing part and the back firing part can be selected at will, so that the applicability of the biopsy gun is improved, and the operation is simple and convenient;

(3) The full-automatic sampling device has the advantages that the full-automatic sampling device is provided with the full-automatic working mode and the semi-automatic working mode, the semi-automatic working mode is adopted for the part with larger sampling difficulty, the full-automatic working mode is adopted for the part with shallower sampling depth, the firing unit can be locked through the anti-false triggering mode, false triggering operation is avoided, and safety is higher.

Drawings

FIG. 1 is a schematic view of the external structure of a gun-retracting biopsy ablation gun according to the present invention;

FIG. 2 is a schematic view of the structure of the gear unit according to the present invention;

FIG. 3 is a schematic view of the internal structure of a gun-retracting biopsy ablation gun according to the present invention;

FIG. 4 is a schematic view of the internal sampling assembly of the present invention;

FIG. 5 is a schematic view of the structure of an ablation unit according to the present invention;

FIG. 6 is a schematic view of an ablation unit of the invention from another perspective;

FIG. 7 is a schematic view of the anti-rotation assembly of the present invention;

FIG. 8 is a schematic view of the internal structure of the anti-rotation assembly of the present invention;

FIG. 9 is an exploded view of an ablation unit (without an ablation assembly) according to the present invention;

FIG. 10 is a schematic view of the structure of the locking element according to the present invention;

FIG. 11 is a schematic diagram of a mode switching unit for preventing false triggering according to the present invention;

FIG. 12 is a schematic diagram of a semi-automatic working mode status mode switching unit according to the present invention;

FIG. 13 is a schematic diagram of a fully automatic working mode status mode switching unit according to the present invention;

in the figure, 1, a gear engaging unit; 11. a gear housing; 12. a hanging column; 13. a guide chute; 14. a first elastic member; 15. a second elastic member; 16. a moving plate; 17. a first push block; 18. a second push block; 19. a first inclined surface;

2. a firing unit; 21. an ejection bar; 22. a side firing section; 221. a first button; 222. a second button; 223. a first through hole; 224. a second through hole; 23. a back firing section; 24. a first trigger button; 25. a second firing button; 251. a first stopper; 252. a second stopper; 253. a rotating shaft; 254. a torsion spring; 255. a third through hole; 256. a fourth through hole;

3. a sampling unit; 31. an inner sampling assembly; 311. an inner core needle; 312. a needle holder; 32. an outer sampling assembly; 321. a circumscribed tube; 322. a tube fixing member;

4. an ablation unit; 41. an ablation assembly; 411. a conductive ring; 412. an on-off switch; 413. an ablation needle; 42. a sleeve; 43. the first rotary clamping assembly; 431. a first clamping block; 432. a first clamping groove; 44. an anti-rotation assembly; 45. a first connector; 451. a first anti-rotation block; 452. a second anti-rotation block; 453. a sliding channel; 454. a connecting rod; 455. a clamping groove; 456. a second clamping block; 457. a second clamping groove; 46. a second connector; 47. a reset frame; 48. a return elastic member; 49. a clamping ring; 410. a reset button;

5. A gun body housing;

6. a mode switching unit; 61. a locking member; 611. a first positioning surface; 612. a second positioning surface; 613. a through hole; 62. an adjusting seat; 63. a mode adjustment block; 64. a gear adjusting protrusion; 65. a recessed structure; 651. a first adjustment tank; 652. a second regulating groove; 653. a third regulating groove; 66. and a second inclined plane.

Detailed Description

Embodiment one:

the invention is specifically described below with reference to the accompanying drawings, and as shown in fig. 1-3, the gun-withdrawal biopsy ablation gun comprises a gear unit 1, a firing unit 2, a sampling unit 3, an ablation unit 4 and a gun body shell 5, wherein the ablation unit 4 is detachably connected to the gun body shell 5, the gear unit 1 is used for driving the sampling unit 3 to move along the inside of the gun body shell 5, and the firing unit 2 is used for driving the sampling unit 3 to eject along the direction extending out of the gun body shell 5. When biopsy puncture is carried out, two operations of sampling and ablation are simultaneously realized through the biopsy gun, the biopsy gun is not required to be singly adopted for sampling and then the sampling part is re-penetrated for performing the ablation operation, and the infection risk caused by the fact that the biopsy gun is repeatedly inserted into the sampling part to enable blood to flow out is avoided. The ablation unit 4 is detachably connected with the gun body housing 5, so that the whole gun body housing 5 can be directly withdrawn from a sampling position after sampling is finished, and then the ablation operation is performed.

The gear unit 1 comprises a gear shell 11, a gear column 12, a guide sliding groove 13, a first elastic piece 14, a second elastic piece 15 and a moving plate 16, wherein the gear shell 11 is rotationally connected with the gun body shell 5, the moving plate 16 is arranged in the gun body shell 5, the gear column 12 is fixed on the moving plate 16 and penetrates through the gear shell 11 along the guide sliding groove 13, the first elastic piece 14 is sleeved outside the pipe fixing piece 322, the second elastic piece 15 is fixed between the needle fixing piece 312 and the gun body shell 5, and a first pushing block 17 used for being clamped with the pipe fixing piece 322 and a second pushing block 18 used for being clamped with the needle fixing piece 312 are fixed on the side part of the moving plate 16. The first elastic member 14 and the second elastic member 15 may be selected as springs. In operation, the plate moves the gear housing 11 to rotate along the gun body housing 5, and meanwhile, the gear column 12 moves along the guide chute 13, and as the gear column 12 is fixedly connected with the moving plate 16, the moving plates 16 on two sides in the gun body housing 5 move along the gun body housing 5, and the first push block 17 and the second push block 18 on the moving plate 16 push the inner sampling assembly 31 and the outer sampling assembly 32 to move along the direction extending into the gun body housing 5, the first elastic piece 14 and the second elastic piece 15 are compressed to store energy, and the inner sampling piece and the outer sampling piece are locked at the position to be triggered.

As shown in fig. 3 and 4, the sampling unit 3 includes an inner sampling assembly 31 and an outer sampling assembly 32, the inner sampling assembly 31 and the outer sampling assembly 32 are coaxially disposed, the outer sampling assembly 32 includes an outer cutting tube 321 and a tube fixing member 322, and the outer cutting tube 321 is fixedly connected with the tube fixing member 322. The inner sampling assembly 31 comprises an inner core needle 311 and a needle fixing piece 312, the needle fixing piece 312 is arranged in the gun body shell 5, the needle fixing piece 312 can move along the gun body shell 5, the inner core needle 311 is fixedly connected with the needle fixing piece 312, the diameter of the inner core needle 311 is smaller than that of the external cutting pipe 321, the inner core needle 311 and the external cutting pipe 321 are coaxially arranged, and a sampling notch is formed at the tail end of the inner core needle 311. When sampling is performed, the inner sampling assembly 31 is firstly triggered, the inner core needle 311 penetrates through the circumscribed tube 321 and the ablation needle 413 to penetrate into tissue of a sampling part, the inner core needle 311 is filled with the tissue to be sampled, the outer sampling assembly 32 is triggered after the inner core needle 311 is triggered, the circumscribed tube 321 and the inner core needle 311 are mutually contacted and sleeved outside the inner core needle 311, and when the circumscribed tube 321 and the tube fixing piece 322 are triggered simultaneously, the circumscribed tube 321 cuts off the tissue of the sampling part. The pipe fixing piece 322 and the needle fixing piece 312 respectively play a role in fixing the circumscribed pipe 321 and the inner core needle 311, and play a certain limiting role at the same time, so that the inner core needle 311 and the outer sleeve 42 are prevented from being flushed out of the gun body shell 5 during firing.

The firing unit 2 comprises an ejection strip 21, a side firing part 22 and a rear firing part 23, wherein the ejection strip 21 is arranged inside the gun body shell 5 and can slide along the gun body shell 5, the side firing part 22 and the rear firing part 23 are fixedly connected with the ejection strip 21, the side firing part 22 is arranged on the side wall of the gun body shell 5, the rear firing part 23 is arranged at the end part of the gun body shell 5, and the first firing buckle 24 and the second firing buckle 25 are both rotatably connected with the gun body shell 5. The first trigger button 24 and/or the second trigger button 25 includes a first stop 251, a second stop 252, a rotating shaft 253 and a torsion spring 254, the gun body housing 5 is rotatably provided with the rotating shaft 253, the first stop 251 and the second stop 252 are fixedly connected, the first stop 251 and the second stop 252 are both sleeved on the rotating shaft 253, the torsion spring 254 is sleeved on the rotating shaft 253, a third through hole 255 and a fourth through hole 256 are formed in the ejection strip 21, one of the first stop 251 penetrates through the third through hole 255, the other of the first stop 251 penetrates through the fourth through hole 256, and the length of the third through hole 255 is greater than that of the fourth through hole 256.

Specifically, after the engagement is completed, the third button is pressed, the ejector strip 21 is fired, the first stopper 251 of the first trigger 24 rotates with the movement of the ejector strip 21 until the first stopper 251 of the first trigger 24 moves to the absolute position in the fourth through hole 256, the second stopper 252 of the first trigger 24 is unlocked from the needle holder 312, and the core needle 311 is fired to penetrate the tissue inside at the sampling position. Because the length of the third through hole 255 is greater than that of the fourth through hole 256, after the first trigger button 24 unlocks the inner sampling member, the ejector strip 21 still continues to move forward, and the first stop 251 of the second trigger button 25 moves along with the ejector strip 21 until the first stop 251 is at the absolute position in the third through hole 255, the second stop 252 of the second trigger button 25 is separated from the pipe fixing member 322 to unlock, and the circumscribed pipe 321 pops out in a direction extending out of the gun body housing 5, so that the tissue at the sampling position of the inner core needle 311 is cut off. The firing unit 2 can fire the inner sampling assembly 31 and the outer sampling assembly 32 respectively, and fire according to the sequence required by the sampling operation, and the operation is simple and convenient.

As shown in fig. 1, 2, 5 and 6, the ablation unit 4 includes an ablation assembly 41, a sleeve 42, a first rotation-preventing assembly 43, an anti-rotation assembly 44 and a first connecting piece 45, wherein the sleeve 42 is detachably connected with the gun body housing 5, the first rotation-preventing assembly 43 is used for connecting the gun body housing 5 and the sleeve 42, the first connecting piece 45 is arranged inside the sleeve 42, and the anti-rotation assembly 44 is used for limiting relative rotation between the sleeve 42 and the first connecting piece 45. The embodiment can immediately perform ablation operation after sampling, can perform sampling and ablation operation after once inserting into a sampling part, avoids multiple damages to human body caused by multiple times of puncturing human body tissues, and simultaneously has the advantages that after puncturing the sampling part, the more abundant materials are obtained for viscera or focus which are rich in blood supply and easy to bleed, the more complications of bleeding are, and the greater the risk is. Heating up local tissue cells to inactivate after sampling can solve the problem to a certain extent. In particular, if the sampling site is a benign tumor, pinhole bleeding during needle withdrawal is prevented from causing blood loss; if the sampling position is malignant tumor, the tissue blood loss caused by pinhole bleeding is prevented, and meanwhile, if cancer cells are in the bleeding, implantation is caused, so that the metastasis of the cancer cells is caused.

The first rotary clamping assembly 43 comprises a first clamping block 431 fixed at the end part of the gun body casing 5 and a first clamping groove 432 arranged on the outer side wall of the sleeve 42, and the first clamping block 431 is matched with the first clamping groove 432. The assembly of the two can be realized by rotating the sleeve 42 or the gun body shell 5, the first clamping block 431 and the first clamping groove 432 are in clearance fit, the clamping connection can be released only when certain force is applied, the first clamping block 431 cannot be separated from the first clamping groove 432 in the process of firing and sampling, and the axial displacement of the sleeve 42 and the gun body shell 5 is mainly limited by the cooperation of the first clamping block 431 and the first clamping groove 432.

The anti-rotation assembly 44 comprises a first connecting piece 45, a second connecting piece 46, a first anti-rotation block 451, a second anti-rotation block 452, a reset frame 47, a reset elastic piece 48 and a clamping ring 49, wherein the first connecting piece 45 is detachably connected to the pipe fixing piece 322, the first connecting piece 45 is inserted into the second connecting piece 46, a sliding channel 453 is formed between the first connecting piece 45 and the second connecting piece 46, the reset frame 47 is erected on the second connecting piece 46 and the reset frame 47 can move along the sliding channel 453, reset buttons 410 and the reset elastic piece 48 are respectively fixed at two ends of the reset frame 47, and the clamping ring 49 is sleeved outside the second connecting piece 46 and fixedly connected with the sleeve 42.

Further, a connecting rod 454 is fixed at one end of the first connecting piece 45 inserted into the second connecting piece 46, a first anti-rotation block 451 is fixed at an end of the connecting rod 454, a clamping groove 455 is formed in the second connecting piece 46, the first anti-rotation block 451 is inserted into the clamping groove 455, a second anti-rotation block 452 is fixed on a side wall of the reset frame 47, the first anti-rotation block 451 and the second anti-rotation block 452 are staggered with each other in a first state, and a projection of a plane where the first anti-rotation block 451 and the second anti-rotation block 452 are located along a radial direction of the sleeve 42 in a second state has an overlapping portion;

when the reset button 410 is pressed, the reset elastic member 48 is compressed, the reset frame 47 integrally moves reversely along the axial direction of the reset elastic member 48, so that the position of the second rotation preventing block 452 is changed, the second rotation preventing block 452 and the first rotation preventing block 451 are staggered along the axial direction of the gun body housing 5, the tube fixing member 322 can be ensured to smoothly move along the gun body housing 5 in gear engagement, and the tube fixing member 322 can be ensured to smoothly pop out of the gun body housing 5 in the process of firing and sampling. After the firing sampling is finished, the reset button 410 returns to enable the projection of the first anti-rotation block 451 and the second anti-rotation block 452 along the plane where the radial direction of the sleeve 42 is positioned to have an overlapped part; so that the first connector 45 and the second connector 46 are not rotated relative to each other when the gun body housing 5 is screwed together. Limiting the relative rotation and axial displacement between the tube mount 322 and the sleeve 42 improves the stability of the connection between the sleeve 42 and the gun body housing 5.

Further, the first connecting piece 45 is provided with a second clamping groove 457, the pipe fixing piece 322 is fixed with a second clamping block 456, and the second clamping block 456 is matched with the second clamping groove 457. When the gun body shell 5 is rotated, the second clamping block 456 also extends into the second clamping groove 457, the second clamping block 456 and the second clamping groove 457 are in clearance fit, and the second clamping block 456 and the second clamping groove 457 can be released from the clamping connection only when a certain force is applied, and the arrangement further ensures the connection tightness degree of the pipe fixing piece 322 and the sleeve 42.

The sleeve 42 is integrally sleeved into the gun body housing 5, and then the reset button 410 is pressed to rotate the gear housing 11 to gear simultaneously, so that the gear is simultaneously engaged in the gun body housing and the sleeve. Further realize percussion sampling. Further rotation of the gun body housing 5 releases the trigger to take the tissue sample. Finally, the reset button 410 is reset to achieve ablation. The sleeve 42 can be reused by adopting the scheme, and the steps can be repeated by repeated use.

The ablation assembly 41 comprises a conductive ring 411, an on-off switch 412 and an ablation needle 413, the ablation needle 413 is fixed at the end part of the tube fixing piece 322, the conductive ring 411 is sleeved outside the ablation needle 413, the conductive ring 411 is communicated with a radio frequency generator, and the on-off switch 412 is arranged on the side wall of the sleeve 42. The tissue at the sampling position is subjected to radio frequency ablation through the ablation component 41, the main mechanism of the radio frequency ablation is thermal injury, and when radio frequency discharges, the temperature of an electrode and a tissue interface can be rapidly increased within seconds and reach stability. Thereby playing a role in stopping bleeding and preventing diffusion.

Specifically, the ablation assembly 41 has two electrodes, one of which is an ablation electrode and the other is a skin electrode, i.e., a conductive ring 411, which is disposed at a tissue concentration, such as the thigh, of the sampler. The on-off switch 412 has two wires at both ends, one connected to the conductive ring 411 and one connected to the electric generator, and the ablation electrode, the skin electrode and the electric generator constitute a loop, when in use, the on-off switch 412 is pressed, the conductive ring 411 is electrified, and as the inner core needle 311 and the external cutting tube 321 are contacted and all conductive, the tissue sample temperature of the area around the conductive ring 411 is raised, the cell death at the local position generates a dead zone, and the area isolates the sample tissue obtained in the inner core needle 311 from the sample tissue on the surface of the human body while achieving hemostasis.

Embodiment two:

unlike the first embodiment, the firing can be performed by selecting the firing position to be operated according to the actual situation.

As shown in fig. 1-3, the side striking part 22 includes a first button 221 and a second button 222, the first button 221 and the second button 222 are fixed on the ejector strip 21, a first through hole 223 and a second through hole 224 are formed in the gun body housing 5, the first button 221 passes through the first through hole 223, the second button 222 passes through the second through hole 224, and the length of the first through hole 223 is greater than that of the second through hole 224. When the medical staff holds the biopsy gun to perform puncture sampling, the operation at different positions can be selected according to the sampled organs, for example, when the breast is subjected to puncture biopsy, the position of the biopsy gun is generally kept horizontal, and the medical staff can trigger by pressing the first button 221 and/or the second button 222. Specifically, the first button 221 is pressed to fire the inner core needle 311, and then the second button 222 is pressed to fire the outer cutting tube 321.

The back firing portion 23 includes a third button secured to the end of the ejector strip 21, the third button extending through the gun body housing 5. When the medical staff holds the biopsy gun to puncture and sample, the biopsy gun can be selectively used at different positions according to different sampled organs, for example, when the biopsy gun is used for puncture and biopsy of the liver, the position of the biopsy gun is generally kept vertical, and the medical staff can fire by pressing a third button. Specifically, the third button is pressed to realize sequential firing of the inner core needle 311 and the outer catheter 321.

By fixing the side firing part 22 and the back firing part 23 at different positions of the ejection strip 21, one of them can be selected for operation according to actual situations, which is beneficial to the progress of biopsy operation.

Embodiment III:

unlike the first and second embodiments, the present embodiment further includes a mode switching unit 6, where the mode switching unit 6 is configured to switch between a false triggering prevention mode, a semi-automatic mode, and a full-automatic mode.

As shown in fig. 10 to 13, in addition to the structures disclosed in the first embodiment and the second embodiment, the mode switching unit 6 further includes a locking member 61, an adjusting seat 62 and a mode adjusting block 63, the adjusting seat 62 is fixed in the gun body housing 5, the locking member 61 is accommodated in the adjusting seat 62, the third button is erected on the locking member 61, a gear adjusting protrusion 64 is fixed on a side wall of the locking member 61, a plurality of concave structures 65 adapted to the gear adjusting protrusion 64 are provided on the adjusting seat 62, the mode adjusting block 63 is fixed on a side portion of the locking member 61, the mode adjusting block 63 extends out of the gun body housing 5, and the mode adjusting block 63 is used for adjusting the gear adjusting protrusion 64 to be partially adapted to different heights of the concave structures 65. The recess structure 65 includes a first adjustment groove 651, a second adjustment groove 652, and a third adjustment groove 653, and the locking piece 61 has a first positioning surface 611, a second positioning surface 612, and a through hole 613. The first positioning surface 611, the second positioning surface 612 and the through hole 613 are arranged in a stepped manner on the locking member 61.

As shown in fig. 11, when the gear adjusting protrusion 64 is matched with the first adjusting slot 651, the third button is clamped to the first positioning surface 611, and the ejection strip 21 is in a false firing preventing state. At this time, the firing device of the firing unit 2 is pressed, the integral position of the ejection bar 21 and the third button is limited, and the ejection bar 21 cannot move along the gun body housing 5.

As shown in fig. 12, when the gear adjusting protrusion 64 is matched with the second adjusting groove 652, the third button is clamped to the first positioning surface 611, so that the third button moves to a position clamped to the second positioning surface 612 when the third button or the first button 221 is pressed, and the ejection strip 21 fires the inner sampling assembly 31.

As shown in fig. 13, when the gear adjusting protrusion 64 is matched with the third adjusting groove 653, the third button 222 is pressed to pass through the through hole 613, and the ejector strip 21 fires the outer sampling assembly 32;

when the gear adjusting protrusion 64 is matched with the third adjusting groove 653, the third button passes through the through hole 613 when the third button is pressed, and the ejection strip 21 sequentially fires the inner sampling assembly 31 and the outer sampling assembly 32.

The semi-automatic mode firing process is as follows: the height of the mode adjusting block 63 is adjusted firstly to enable the gear adjusting protrusion 64 to be matched with the second adjusting groove 652, the first button 221 or the third button is pressed down, the ejection bar 21 moves along the gun body housing 5, the first trigger button 24 firstly releases the locking of the needle fixing piece 312, the inner core needle 311 moves along the direction extending out of the gun body housing 5 and is pricked into a sampling position to sample, after the end part of the inner core needle 311 is fully filled with sampling tissues, the height of the mode adjusting block 63 is adjusted further to enable the gear adjusting protrusion 64 to be matched with the third adjusting groove 653, the second button 222 or the third button is pressed down, the ejection bar 21 continues to move along the gun body housing 5, the second trigger button 25 releases the locking of the tube fixing piece 322, and the circumscribed tube 321 cuts off the sampling position along the outer part of the inner core needle 311.

The full-automatic mode firing process is as follows: the height of the mode adjusting block 63 is directly adjusted so that the gear adjusting protrusion 64 is matched with the third adjusting groove 653, the second button 222 or the third button is pressed, the ejection bar 21 moves along the gun body housing 5, the first trigger button 24 and the second trigger button 25 continuously and sequentially release the locking of the needle fixing piece 312 and the tube fixing piece 322, the inner core needle 311 moves along the direction extending out of the gun body housing 5 and is pricked into the sampling part to sample, and the outer cutting tube 321 cuts off the sampling part along the outer part of the inner core needle 311.

The working process comprises the following steps:

step one: and (3) assembling: the sleeve 42 of the ablation unit 4 is assembled with the gun body housing 5, the external cutting tube 321 extends into the ablation needle 413, the gun body housing 5 is rotated to simultaneously clamp the first clamping block 431 into the first clamping groove 432, the second clamping block 456 into the second clamping groove 457, and the projection of the first rotation preventing block 451 and the second rotation preventing block 452 along the plane of the radial direction of the sleeve 42 has an overlapping part.

Step two: and (3) gear engagement: the plate-moving gear housing 11 moves the moving plate 16 within the housing, the first elastic member 14 and the second elastic member 15 are compressed, and the first push block 17 and the second push block 18 push the inner sampling assembly 31 and the outer sampling assembly 32 to move in a direction extending into the gun body housing 5. When the first inclined surface 19 at the end of the moving plate 16 contacts the second inclined surface 66 at the bottom of the locking member 61 during the moving process, the gear adjusting protrusion 64 is matched with the first adjusting groove 651, so as to push the third button to be clamped on the first positioning surface 611, and the firing unit 2 is in an anti-false firing state; pressing the reset button 410 while pulling the gear housing 11 causes the first anti-rotation block 451 and the second anti-rotation block 452 to be staggered, so that the pipe fixing piece 322 can move along the gun body housing 5 during gear engagement;

Step three: firing and sampling: reset button 410 is in the state of pressing down when percussion sampling, and through side percussion portion 22 or back percussion portion 23 with catapulting strip 21 along rifle body housing 5 removal, in order percussion inner sampling assembly 31 and outer sampling assembly 32, inner sampling assembly 31 is pricked tissue sample department by inner core needle 311 when percussion, and outer sampling assembly 32 is by the percussion, and circumscribed pipe 321 cuts off the tissue sample outside the inner sampling assembly 31, and the percussion sampling has semi-automatic mode and full-automatic mode two kinds of circumstances.

Step four: gun withdrawal: the reset button 410 rebounds to the initial position, the projection of the first rotation preventing block 451 and the second rotation preventing block 452 along the plane where the radial direction of the sleeve 42 is located has an overlapped part, the first connecting piece 45 is connected with the second connecting piece 46, the gun body shell 5 is rotated to enable the first clamping block 431 to be moved out of the first clamping groove 432, the second clamping block 456 to be moved out of the second clamping groove 457, and the gun body shell 5 is wholly withdrawn from the sampling position; rotating the gun body shell 5 to enable the whole gun body shell 5 to withdraw from the sampling position;

step five: ablation: depressing the on-off switch 412 energizes the conductive ring 411, which increases the temperature of the tissue within its coverage area and locally deactivates the cells.

The above technical solution only represents the preferred technical solution of the present invention, and some changes that may be made by those skilled in the art to some parts of the technical solution represent the principles of the present invention, and the technical solution falls within the scope of the present invention.

Claims (10)

1. The gun-withdrawal biopsy ablation gun is characterized by comprising a gear unit (1), a firing unit (2), a sampling unit (3), an ablation unit (4) and a gun body shell (5), wherein the ablation unit (4) is detachably connected to the gun body shell (5), the gear unit (1) is used for driving the sampling unit (3) to move along the inside of the gun body shell (5), and the firing unit (2) is used for driving the sampling unit (3) to eject along the direction extending out of the gun body shell (5);

the ablation unit (4) comprises an ablation assembly (41), a sleeve (42), a first rotary clamping assembly (43), an anti-rotation assembly (44) and a first connecting piece (45), wherein the sleeve (42) is detachably connected with the gun body shell (5), the first rotary clamping assembly (43) is used for connecting the gun body shell (5) with the sleeve (42), the first connecting piece (45) is arranged inside the sleeve (42), and the anti-rotation assembly (44) is used for limiting relative rotation between the sleeve (42) and the first connecting piece (45).

2. A gun withdrawal biopsy ablation gun according to claim 1, wherein the sampling unit (3) comprises an inner sampling assembly (31) and an outer sampling assembly (32), the inner sampling assembly (31) and the outer sampling assembly (32) being coaxially arranged, the outer sampling assembly (32) comprising an outer cutting tube (321) and a tube fixing member (322), the outer cutting tube (321) being fixedly connected to the tube fixing member (322);

The inner sampling assembly (31) comprises an inner core needle (311) and a needle fixing piece (312), the needle fixing piece (312) is arranged in the gun body shell (5), the needle fixing piece (312) can move along the gun body shell (5), the inner core needle (311) is fixedly connected with the needle fixing piece (312), the diameter of the inner core needle (311) is smaller than that of the circumscribed tube (321), the inner core needle (311) and the circumscribed tube (321) are coaxially arranged, and a sampling notch is formed at the tail end of the inner core needle (311).

3. The gun withdrawal type biopsy ablation gun according to claim 1, wherein the first rotary clamping assembly (43) comprises a first clamping block (431) fixed at the end part of the gun body shell (5) and a first clamping groove (432) formed in the outer side wall of the sleeve (42), and the first clamping block (431) is matched with the first clamping groove (432).

4. The gun-withdrawal biopsy ablation gun according to claim 1, wherein the anti-rotation assembly (44) comprises a first connecting piece (45), a second connecting piece (46), a first anti-rotation block (451), a second anti-rotation block (452), a reset frame (47), a reset elastic piece (48) and a clamping ring (49), the first connecting piece (45) is detachably connected to the tube fixing piece (322), the first connecting piece (45) is inserted into the second connecting piece (46), a sliding channel (453) is formed between the first connecting piece (45) and the second connecting piece (46), a reset frame (47) is erected on the second connecting piece (46) and can move along the sliding channel (453), a reset button (410) and the reset elastic piece (48) are respectively fixed at two ends of the reset frame (47), and the clamping ring (49) is sleeved outside the second connecting piece (46) and fixedly connected with the sleeve (42).

5. The gun withdrawal type biopsy ablation gun according to claim 4, wherein a connecting rod (454) is fixed at one end of the first connecting piece (45) inserted into the second connecting piece (46), a first anti-rotation block (451) is fixed at the end of the connecting rod (454), a clamping groove (455) is formed in the second connecting piece (46), the first anti-rotation block (451) is inserted into the clamping groove (455), a second anti-rotation block (452) is fixed on the side wall of the reset frame (47), the first anti-rotation block (451) and the second anti-rotation block (452) are staggered in the first state, and the projection of the first anti-rotation block (451) and the second anti-rotation block (452) on a plane along the radial direction of the sleeve (42) has an overlapping part in the second state;

the first connecting piece (45) is provided with a second clamping groove (457), the pipe fixing piece (322) is fixedly provided with a second clamping block (456), and the second clamping block (456) is matched with the second clamping groove (457).

6. The gun-withdrawal biopsy ablation gun according to claim 2, wherein the ablation assembly (41) comprises a conductive ring (411), an on-off switch (412) and an ablation needle (413), the ablation needle (413) is fixed at the end of the tube fixing piece (322), the conductive ring (411) is sleeved outside the ablation needle (413), the conductive ring (411) is communicated with a radio frequency generator, and the on-off switch (412) is arranged on the side wall of the sleeve (42).

7. The gun-withdrawal biopsy ablation gun according to claim 1, wherein the firing unit (2) comprises a ejection bar (21), a side firing part (22) and a rear firing part (23), a first firing buckle (24) and a second firing buckle (25), the ejection bar (21) is arranged inside the gun body shell (5) and can slide along the gun body shell (5), the side firing part (22) and the rear firing part (23) are fixedly connected with the ejection bar (21), the side firing part (22) is arranged on the side part of the gun body shell (5), the rear firing part (23) is arranged at the end part of the gun body shell (5), and the first firing buckle (24) and the second firing buckle (25) are rotationally connected with the gun body shell (5).

The side-firing part (22) comprises a first button (221) and a second button (222), the first button (221) and the second button (222) are fixed on the ejection strip (21), a first through hole (223) and a second through hole (224) are formed in the gun body shell (5), the first button (221) penetrates through the first through hole (223), the second button (222) penetrates through the second through hole (224), and the length of the first through hole (223) is larger than that of the second through hole (224).

The back firing part (23) comprises a third button, the third button is fixed at the end part of the ejection bar (21), and the third button penetrates through the gun body shell (5).

8. The gun-retracting biopsy ablation gun according to claim 1, further comprising a mode switching unit (6), wherein the mode switching unit (6) comprises a locking piece (61), an adjusting seat (62) and a mode adjusting block (63), the adjusting seat (62) is fixed in the gun body shell (5), the locking piece (61) is accommodated in the adjusting seat (62) and the third button is erected on the locking piece (61), a gear adjusting protrusion (64) is fixed on the side wall of the locking piece (61), a plurality of concave structures (65) matched with the gear adjusting protrusion (64) are arranged on the adjusting seat (62), a mode adjusting block (63) is fixed on the side part of the locking piece (61), the mode adjusting block (63) extends out of the gun body shell (5), and the mode adjusting block (63) is used for adjusting the gear adjusting protrusion (64) to be partially matched with the concave structures (65) at different heights;

the concave structure (65) comprises a first adjusting groove (651), a second adjusting groove (652) and a third adjusting groove (653), and the locking piece (61) is provided with a first positioning surface (611), a second positioning surface (612) and a penetrating hole (613);

when the gear adjusting protrusion (64) is matched with the first adjusting groove (651), the third button is clamped on the first positioning surface (611), and the ejection strip (21) is in an anti-false-firing state;

When the gear adjusting protrusion (64) is matched with the second adjusting groove (652), the third button is clamped on the first positioning surface (611) so that the third button moves to a position clamped on the second positioning surface (612) when the third button or the first button (221) is pressed, and the ejection strip (21) fires the inner sampling assembly (31);

when the gear adjusting protrusion (64) is matched with the third adjusting groove (653), the third button passes through the through hole (613) when the second button (222) is pressed, and the ejection strip (21) fires the outer sampling assembly (32);

when the gear adjusting protrusion (64) is matched with the third adjusting groove (653), the third button passes through the through hole (613) when being pressed, and the ejection strip (21) sequentially fires the inner sampling assembly (31) and the outer sampling assembly (32).

9. A biopsy ablation method comprising a gun withdrawal biopsy ablation gun according to any one of claims 1-8, comprising:

step one: and (3) assembling: assembling a sleeve (42) of an ablation unit (4) with a gun body shell (5), enabling an external cutting tube (321) to extend into an ablation needle (413), rotating the gun body shell (5) to simultaneously clamp a first clamping block (431) into a first clamping groove (432), clamp a second clamping block (456) into a second clamping groove (457), and enabling projections of a first rotation preventing block (451) and a second rotation preventing block (452) on planes along the radial direction of the sleeve (42) to have overlapping parts;

Step two: and (3) gear engagement: pressing the reset button (410) to enable the first rotation preventing block (451) and the second rotation preventing block (452) to be staggered, so that the pipe fixing piece (322) can move along the gun body shell (5) during gear engagement, the plate-moving gear engaging shell (11) enables the moving plate (16) to move in the shell, the first elastic piece (14) and the second elastic piece (15) are compressed, and the first pushing block (17) and the second pushing block (18) push the inner sampling assembly (31) and the outer sampling assembly (32) to move towards the direction extending into the gun body shell (5); when the first inclined surface (19) at the end part of the moving plate (16) is contacted with the second inclined surface (66) at the bottom of the locking piece (6) in the moving process, the gear adjusting protrusion (64) is matched with the first adjusting groove (651), the third button is clamped on the first positioning surface (611), and the biopsy gun is in an anti-false firing state;

step three: firing and sampling: the reset button (410) is in a pressed state when the sampling is triggered, the ejection strip (21) is moved along the gun body shell (5) through the side triggering part (22) or the rear triggering part (23), the inner sampling assembly (31) and the outer sampling assembly (32) are triggered in sequence, the inner core needle (311) is pricked into a tissue sample when the inner sampling assembly (31) is triggered, and the outer sampling assembly (32) is triggered, the outer cutting tube (321) cuts off the tissue sample outside the inner sampling assembly (31);

Step four: gun withdrawal: the reset button (410) rebounds to an initial position, the projection of the first anti-rotation block (451) and the second anti-rotation block (452) along the plane of the radial direction of the sleeve (42) is provided with an overlapped part, the first connecting piece (45) is connected with the second connecting piece (46), the gun body shell (5) is rotated to enable the first clamping block (431) to be moved out of the first clamping groove (432), the second clamping block (456) to be moved out of the second clamping groove (457), and the gun body shell (5) is wholly withdrawn from the sampling position;

step five: ablation: pressing the on-off switch (412) causes the conducting ring (411) to be electrified, the conducting ring (411) increases the tissue temperature in the covered area, and local cells are deactivated.

10. The biopsy ablation method according to claim, wherein in the third step, the firing sample has a semiautomatic mode, comprising first adjusting the height of the mode adjusting block (63) so that the gear adjusting protrusion (64) is matched with the second adjusting groove (652), pressing the first button (221) or the third button, moving the ejection bar (21) along the gun body housing (5), first firing the button (24) to unlock the needle fixing member (312), moving the inner core needle (311) in a direction extending out of the gun body housing (5) to puncture the sampling site for sampling, further adjusting the height of the mode adjusting block (63) so that the gear adjusting protrusion (64) is matched with the third adjusting groove (653), pressing the second button (222) or the third button, continuing to move the ejection bar (21) along the gun body housing (5), unlocking the second firing the button (25), and cutting the outer core needle (311) along the outer cutting off the sampling site;

In the third step, the percussion sampling has full-automatic mode, the height of the mode adjusting block (63) is directly adjusted to enable the gear adjusting protrusion (64) to be matched with the third adjusting groove (653), the second button (222) or the third button is pressed down, the ejection strip (21) moves along the gun body shell (5), the first percussion buckle (24) and the second percussion buckle (25) continuously and sequentially release the locking of the needle fixing piece (312) and the pipe fixing piece (322), the inner core needle (311) moves along the direction extending out of the gun body shell (5) to be pricked into a sampling position for sampling, and the outer cutting tube (321) cuts off the sampling position along the outer part of the inner core needle (311).