CN218356258U - Retreat gun type biopsy ablation gun - Google Patents

Abstract

The utility model discloses a gun-withdrawing type biopsy ablation gun, which comprises a gear engaging unit, a firing unit, a sampling unit, an ablation unit and a gun body shell, wherein the gun body shell is detachably connected with the ablation unit; the ablation unit includes ablation subassembly, sleeve pipe, first rotatory joint subassembly, prevents changeing subassembly and first connecting piece, the sleeve pipe with the connection can be dismantled to rifle body shell, first rotatory joint subassembly is used for connecting rifle body shell with the sleeve pipe, it is used for the restriction to prevent changeing the subassembly the sleeve pipe with relative rotation between the first connecting piece. The beneficial effects of the utility model are that, the biopsy rifle realizes the sample simultaneously and melts two operations, need not to adopt the sample of biopsy rifle alone and pierces the sample position again and melt the operation.

Description

Retreat gun type biopsy ablation gun

Technical Field

The utility model relates to a medical instrument technical field, especially a move back rifle formula biopsy and melt rifle for the puncture biopsy.

Background

The biopsy gun is a device commonly used in biopsy puncture, during detection, a gun head of the biopsy gun is inserted into a part to be detected, and after a tissue to be detected is taken out, the biopsy gun is pulled out. For organs or lesions with abundant blood supply and easy bleeding, more sufficient material selection means more bleeding complications and higher risk. Meanwhile, if the sampling part is a malignant tumor, the situation that the malignant tissue invades the healthy tissue is easily caused during sampling.

In the prior art, the biopsy gun and the ablation gun are respectively adopted for independent operation, after the puncture biopsy, the ablation needle is inserted for the second time for ablation, the pain of a patient is increased, the incidence rate of postoperative complications is increased, and meanwhile, if the biopsy sampling position is malignant tumor, the untimely treatment after the biopsy sampling easily causes diffusion.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems and designing a retreat gun type biopsy ablation gun. The gun body shell is detachably connected with the ablation unit, the gear engaging unit is used for driving the sampling unit to move along the interior 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, the sleeve is detachably connected with the gun body shell, the first rotary clamping assembly is used for being connected with the gun body shell and the sleeve, the first connecting piece is arranged inside the sleeve, and the anti-rotation assembly is used for limiting the sleeve and relative rotation between the first connecting pieces.

Furthermore, 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 outer cutting pipe and a pipe fixing piece, and the outer cutting pipe is fixedly connected with the pipe fixing piece;

the inner sampling assembly comprises an inner core needle and a needle fixing piece, the needle fixing piece is arranged in the gun body shell and 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 outer cutting tube, the inner core needle and the outer cutting tube are coaxially arranged, and a sampling notch is formed in the tail end of the inner core needle.

Furthermore, first rotatory joint subassembly is including being fixed in the first fixture block of rifle body housing tip with set up in the first draw-in groove of sleeve pipe lateral wall, first fixture block with first draw-in groove looks adaptation.

Furthermore, the anti-rotation assembly comprises a first connecting piece, a second connecting piece, a first anti-rotation piece, a second anti-rotation piece, a reset frame, a reset elastic piece and a clamping ring, the first connecting piece is detachably connected to the pipe fixing piece and is connected to the second connecting piece in an inserting mode, a sliding channel is formed between the first connecting piece and the second connecting piece, the reset frame is arranged on the second connecting piece in an erecting mode and can move along the sliding channel, the reset button and the reset elastic piece are fixed to the two end portions of the reset frame respectively, and the clamping ring is sleeved on the outer portion of the second connecting piece and fixedly connected with the sleeve.

Furthermore, 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 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 first anti-rotation block and the second anti-rotation block have an overlapping part in the projection of the radial plane of the sleeve in the second state;

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

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

Furthermore, the firing unit comprises an ejection strip, a side firing part, a rear firing part, a first firing buckle and a second firing buckle, the ejection strip is arranged in the gun body shell and can slide along the gun body shell, the side firing part and the rear firing part are fixedly connected with the ejection strip, the side firing part is arranged at 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 rotationally 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 rear 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.

The automatic gear shifting device comprises a gun body shell, a third button, a mode switching unit and a gear shifting mechanism, wherein the gun body shell is internally fixed with an adjusting seat;

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-error triggering 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 when the third button or the first button is pressed, the third button moves to a position clamped on the second positioning surface, and the ejection strip triggers the inner sampling assembly;

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

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

Utilize the technical scheme of the utility model one kind move back rifle formula biopsy and melt rifle, the beneficial effect who reaches:

(1) Interior sampling subassembly, outer sampling subassembly and the equal coaxial setting of ablation needle to inside interior sampling subassembly stretched into outer sampling subassembly, outer sampling subassembly stretched into inside the ablation needle. When sampling, the inner core needle and the outer tangent tube are sequentially and respectively fired 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 removed from the limit, the second clamping block and the second clamping groove to be removed from the limit, the gun body shell is withdrawn from the sampling position and then is ablated through the ablation unit, the biopsy gun can simultaneously realize sampling and ablation, and the biopsy gun does not need to be independently adopted to sample and then penetrate into the sampling position again to perform ablation operation;

(2) According to different actual conditions of sampling organs and parts, one mode of carrying out firing operation through the side firing part and the rear firing part can be selected at will, the applicability of the biopsy gun is improved, and the operation is simple and convenient;

(3) The automatic trigger has a full-automatic working mode and a semi-automatic working mode, adopts the semi-automatic working mode aiming at the part with high sampling difficulty and adopts the full-automatic working mode aiming at the part with shallow sampling depth, and has a false trigger prevention mode, so that the trigger unit can be locked, false trigger operation is avoided, and the safety is higher.

Drawings

Fig. 1 is a schematic view of an external structure of a gun-withdrawing type biopsy ablation gun according to the present invention;

fig. 2 is a schematic structural diagram of the gear engaging unit according to the present invention;

fig. 3 is a schematic view of the internal structure of a gun-withdrawing type biopsy ablation gun according to the present invention;

fig. 4 is a schematic structural view of the inner sampling assembly of the present invention;

fig. 5 is a schematic structural diagram of the ablation unit of the present invention;

fig. 6 is a schematic structural view of another view angle of the ablation unit according to the present invention;

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 the ablation unit (without the ablation assembly) of the present invention;

fig. 10 is a schematic structural view of a locking member according to the present invention;

fig. 11 is a schematic structural diagram of the mode switching unit in the false triggering prevention state according to the present invention;

fig. 12 is a schematic structural diagram of the semi-automatic operating mode state mode switching unit according to the present invention;

fig. 13 is a schematic structural diagram of the full-automatic operating mode state mode switching unit according to the present invention;

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

2. a firing unit; 21. ejecting the strip; 22. a side-firing portion; 221. a first button; 222. a second button; 223. a first through hole; 224. a second through hole; 23. a rear percussion part; 24. a first firing buckle; 25. a second firing buckle; 251. a first stopper; 252. a second stopper; 253. a rotating shaft; 254. a torsion spring; 255. a third through hole; 256. a fourth via hole;

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

4. an ablation unit; 41. an ablation assembly; 411. conducting rings; 412. an on-off switch; 413. an ablation needle; 42. a sleeve; 43. a first rotary clamping assembly; 431. a first clamping block; 432. a first card slot; 44. an anti-rotation component; 45. a first connecting member; 451. a first rotation prevention block; 452. a second rotation prevention block; 453. a slide channel; 454. a connecting rod; 455. a clamping groove; 456. a second fixture block; 457. a second card slot; 46. a second connecting member; 47. a reset frame; 48. a restoring elastic member; 49. a snap 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 bulge; 65. a recessed structure; 651. a first adjustment groove; 652. a second adjustment groove; 653. a third regulating groove; 66. a second inclined plane.

Detailed Description

The first embodiment is as follows:

the utility model discloses it is following to combine the attached drawing to describe specifically the utility model discloses a move back rifle formula biopsy and melt rifle, as shown in fig. 1-3, including engaging gear unit 1, firing unit 2, sampling unit 3, melt unit 4 and rifle body shell 5, can dismantle on the rifle body shell 5 and be connected with and melt unit 4, engaging gear unit 1 is used for the drive sampling unit 3 is followed rifle body shell 5 is inside to be removed, firing unit 2 is used for the drive sampling unit 3 is followed stretch out rifle body shell 5's direction is launched. When carrying out the biopsy puncture, realize sample and melt two operations simultaneously through the biopsy rifle, need not to adopt the biopsy rifle sample alone and pierce the sample site again and melt the operation, avoided the biopsy rifle reinsertion sample site to make the blood outflow and the infection risk that causes. The ablation unit 4 is detachably connected with the gun body shell 5, so that the whole gun body shell 5 can be directly withdrawn from a sampling part after sampling is finished, and then ablation operation is performed.

The unit 1 of putting into gear includes that the shell 11 of putting into gear, the post 12 of putting into gear, direction spout 13, first elastic component 14, second elastic component 15 and movable plate 16, put into gear the shell 11 with rifle body shell 5 rotates to be connected, be equipped with movable plate 16 in rifle body shell 5, it is fixed in to put into gear post 12 the movable plate 16 is followed direction spout 13 runs through put into gear the shell 11, pipe mounting 322 is outside is located to first elastic component 14 cover, second elastic component 15 be fixed in needle mounting 312 with between the rifle body shell 5, the 16 lateral parts of movable plate are fixed with and are used for the joint the first ejector pad 17 of pipe mounting 322 with be used for the joint the second ejector pad 18 of needle mounting 312. The first elastic member 14 and the second elastic member 15 may be selected as springs. During operation, the gear engaging shell 11 is moved by the plate to rotate along the gun body shell 5, meanwhile, the gear engaging column 12 moves along the guide chute 13, as the gear engaging column 12 is fixedly connected with the moving plate 16, the moving plate 16 on two sides in the gun body shell 5 moves along the gun body shell 5, 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 shell 5, the first elastic element 14 and the second elastic element 15 are compressed to store energy, and the inner sampling element and the outer sampling element 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 pipe 321 and a pipe fixing member 322, and the outer cutting pipe 321 is fixedly connected to the pipe 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 outer cutting tube 321, the inner core needle 311 and the outer cutting tube 321 are coaxially arranged, and a sampling notch is formed in the tail end of the inner core needle 311. When sampling is carried out, the inner sampling assembly 31 is firstly triggered, the inner core needle 311 penetrates through the outer cutting tube 321 and the ablation needle 413 to penetrate into tissue of a sampling part, the inner core needle 311 is filled with the sampling tissue, the outer sampling assembly 32 is then triggered, the outer cutting tube 321 is in contact with the inner core needle 311 and is sleeved outside the inner core needle 311, and when the outer cutting tube 321 and the tube fixing piece 322 are simultaneously triggered, the outer cutting tube 321 cuts the tissue of the sampling part. The tube fixing member 322 and the needle fixing member 312 respectively play a role of fixing the external cutting tube 321 and the inner core needle 311, and play a certain limiting role at the same time, so as to prevent the inner core needle 311 and the outer sleeve 42 from being rushed out of the gun body shell 5 when being fired.

Firing unit 2 includes ejection strip 21, side portion of firing 22, back portion of firing 23, and first portion of firing is detained 24 and second portion of firing is detained 25, ejection strip 21 is located 5 insidely of rifle body shell and can follow rifle body shell 5 slides, side portion of firing 22 back portion of firing 23 all with ejection strip 21 fixed connection, side portion of firing 22 is located 5 lateral walls of rifle body shell, back portion of firing 23 is located 5 tip of rifle body shell, first portion of firing is detained 24 the second portion of firing is detained 25 all with rifle body shell 5 is rotated and is connected. The first firing buckle 24 and/or the second firing buckle 25 include a first stopper 251, a second stopper 252, a rotating shaft 253 and a torsion spring 254, the gun body housing 5 is rotatably provided with a rotating shaft 253, the first stopper 251 is fixedly connected with the second stopper 252, the first stopper 251 and the second stopper 252 are both sleeved on the rotating shaft 253, the rotating shaft 253 is sleeved with the torsion spring 254, the ejection strip 21 is provided with a third through hole 255 and a fourth through hole 256, one of the first stopper 251 passes through the third through hole 255, the other first stopper 251 passes through the fourth through hole 256, and the length of the third through hole 255 is greater than the length of the fourth through hole 256.

Specifically, after the gear is engaged, the third button is pressed, the ejection bar 21 is fired, the first stop 251 of the first firing buckle 24 rotates along with the movement of the ejection bar 21 until the ejection bar moves to the absolute position in the fourth through hole 256, the second stop 252 of the first firing buckle 24 is unlocked from the needle fixing member 312, and the inner core needle 311 is fired to penetrate into the tissue 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 buckle 24 unlocks the inner sampling member, the ejector strip 21 still continues to move forward, the first stop block 251 of the second trigger buckle 25 moves along with the ejector strip 21 until the first stop block 251 moves to the position of the maximum position in the third through hole 255, the second stop block 252 of the second trigger buckle 25 is separated from the tube fixing member 322 to unlock, the outer cutting tube 321 is ejected in the direction extending out of the gun body shell 5, and 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 sampling operation, so that 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 rotary clamping assembly 43, an anti-rotation assembly 44 and a first connecting member 45, the sleeve 42 is detachably connected to the gun body housing 5, the first rotary clamping assembly 43 is used for connecting the gun body housing 5 and the sleeve 42, the first connecting member 45 is arranged inside the sleeve 42, and the anti-rotation assembly 44 is used for limiting the relative rotation between the sleeve 42 and the first connecting member 45. The embodiment can carry out the ablation operation after the sample is ended, can take a sample and melt two operations after once only inserting the sample site, avoids puncturing human tissue many times and causes a lot of damage to the human body, punctures the back to the sample site simultaneously, to the internal organs or the focus that the blood supply is abundant, easy hemorrhage, draw materials more fully and mean that hemorrhagic complication is more, the risk is big more. The problem can be solved to a certain extent by heating and inactivating local tissue cells after sampling. Specifically, if the sampling site is a benign tumor, blood loss due to needle hole bleeding when the needle is pulled out is prevented; if the sampling position is a malignant tumor, the tissue blood loss caused by the needle hole bleeding is prevented, and the cancer cells in the bleeding can be planted to cause the metastasis of the cancer cells.

The first rotary clamping assembly 43 comprises a first clamping block 431 fixed at the end of the gun body housing 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 sleeve 42 and the gun body shell 5 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, clamping connection of the first clamping block 431 and the first clamping groove 432 can be removed only by applying certain force, the first clamping block 431 cannot be separated from the first clamping groove 432 in the process of percussion sampling, and the axial displacement of the sleeve 42 and the gun body shell 5 is mainly limited by the matching of the first clamping block 431 and the first clamping groove 432.

The rotation preventing assembly 44 comprises a first connecting piece 45, a second connecting piece 46, a first rotation preventing block 451, a second rotation preventing block 452, a resetting frame 47, a resetting elastic piece 48 and a clamping ring 49, the first connecting piece 45 is detachably connected to the pipe fixing piece 322, the first connecting piece 45 is connected to the second connecting piece 46 in an inserting mode, a sliding channel 453 is formed between the first connecting piece 45 and the second connecting piece 46, the resetting frame 47 is erected on the second connecting piece 46, the resetting frame 47 can move along the sliding channel 453, the resetting button 410 and the resetting elastic piece 48 are respectively fixed at two end portions of the resetting frame 47, the clamping ring 49 is sleeved outside the second connecting piece 46, and the clamping ring 49 is fixedly connected with the sleeve 42.

Furthermore, a connecting rod 454 is fixed at one end of the first connecting member 45 inserted into the second connecting member 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 member 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 with each other in the first state, and the projection of the first anti-rotation block 451 and the second anti-rotation block 452 on the plane where the radial direction of the sleeve 42 is located has an overlapping portion in the second state;

when the reset button 410 is pressed, the reset elastic element 48 is compressed, the reset frame 47 moves reversely along the axial direction of the reset elastic element 48, so that the position of the second anti-rotation block 452 changes, the second anti-rotation block 452 and the first anti-rotation block 451 are arranged in a staggered manner along the axial direction of the gun body shell 5, the tube fixing element 322 can move smoothly along the gun body shell 5 when the gear is engaged, and the tube fixing element 322 can be ejected smoothly from the gun body shell 5 when the sampling is fired. After the sampling is triggered, the reset button 410 returns to the original position, so that the projections of the first anti-rotation block 451 and the second anti-rotation block 452 along the radial direction of the sleeve 42 have an overlapping part; so that the first connecting member 45 and the second connecting member 46 are tightly connected together and do not rotate relatively when the gun body housing 5 is screwed. The relative rotation and axial displacement between the tube fixing member 322 and the sleeve 42 are restricted, and the stability of the connection between the sleeve 42 and the gun body housing 5 is improved.

Further, a second locking groove 457 is formed in the first connecting member 45, a second locking block 456 is fixed to the pipe fixing member 322, and the second locking block 456 is matched with the second locking groove 457. When the gun body housing 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 adopt clearance fit, and the clamping connection between the second clamping block 456 and the second clamping groove 457 can be released only when a certain force is applied, so that the tightness degree of connection between the tube fixing member 322 and the sleeve 42 is further ensured by the arrangement.

The sleeve 42 is sleeved into the gun body shell 5, and then the reset button 410 is pressed while the gear engaging shell 11 is rotated to engage, so that the gear engagement inside the gun body shell and inside the sleeve is realized simultaneously. Further realize the percussion sample. Further rotation of the gun housing 5 releases the trigger to access the tissue sample. Finally, the reset button 410 is returned to the original position to achieve ablation. By adopting the scheme, the sleeve 42 can be repeatedly used, and the steps can be repeated.

The ablation assembly 41 comprises a conducting 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 member 322, the conducting ring 411 is sleeved outside the ablation needle 413, the conducting 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 site is ablated by the ablation assembly 41, the main mechanism of the rf ablation is thermal injury, and the temperature at the interface between the electrode and the tissue can rise rapidly and stabilize within seconds during the rf discharge. Thereby achieving the functions of hemostasis and diffusion prevention.

In particular, the ablation assembly 41 has two electrodes, one of which is an ablation electrode, i.e. a conductive ring 411, and the other of which is a skin electrode, which is placed at a tissue concentration of the sampler, e.g. at the thigh. Two ends of the on-off switch 412 are provided with two conducting wires, one conducting wire is connected to the conducting ring 411, the other conducting wire is connected to the electric generator, the ablation electrode, the skin electrode and the electric generator form a loop, when the on-off switch 412 is pressed down in use, the conducting ring 411 is electrified, as the inner core needle 311 is in contact with the outer tangent tube 321 and is all conducting, the temperature of a tissue sample in the area around the conducting ring 411 is increased, cells in a local position die to generate a dead zone, and the sample tissue obtained in the inner core needle 311 is isolated from the sample tissue on the surface of a human body by the area while hemostasis is realized.

The second embodiment:

different from the first embodiment, the second embodiment can be operated at different positions according to actual conditions to achieve firing.

As shown in fig. 1-3, the side firing 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, the gun housing 5 is provided with a first through hole 223 and a second through hole 224, 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 for puncture sampling, the position of the biopsy gun can be kept horizontal when the medical staff performs the puncture sampling according to different sampled organs, for example, when the position of the biopsy gun is kept horizontal, and the medical staff can perform the firing 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 rear firing part 23 comprises a third button fixed at the end of the ejector strip 21, and the third button penetrates through the gun body housing 5. When the medical worker holds the biopsy gun for puncture sampling, the medical worker can choose to operate at different positions according to different sampled organs, for example, when the medical worker performs puncture biopsy on the liver, the position of the biopsy gun is generally kept vertical, and the medical worker can perform firing by pressing a third button. Specifically, pressing the third button effects sequential firing of the inner core needle 311 and the outer cannula 321.

By fixing the side firing part 22 and the rear firing part 23 at different positions of the ejection strip 21, one of the side firing part and the rear firing part can be selected to operate according to actual conditions, and the process of biopsy operation is facilitated.

Example three:

different from the first embodiment and the second embodiment, in the present embodiment, a mode switching unit 6 is further provided, and the mode switching unit 6 is used for switching 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 structure disclosed in the first and second embodiments, the gun body housing 5 further includes a mode switching unit 6, the mode switching unit 6 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 disposed on the locking member 61, a gear adjusting protrusion 64 is fixed on a side wall of the locking member 61, a plurality of recessed structures 65 adapted to the gear adjusting protrusion 64 are disposed 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 adapted to different height portions of the recessed structures 65. The concave structure 65 includes a first adjusting groove 651, a second adjusting groove 652 and a third adjusting groove 653, and the locking member 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 in the locking member 61.

As shown in fig. 11, when the gear adjusting protrusion 64 matches with the first adjusting groove 651, the third button is clamped on the first positioning surface 611, and the ejection bar 21 is in a false triggering prevention state. At this time, the firing device of the firing unit 2 is pressed, the position of the ejection bar 21 and the third button as a whole is limited, and the ejection bar 21 cannot move along the gun body housing 5.

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

As shown in fig. 13, when the gear position 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 ejector strip 21 fires the outer sampling assembly 32;

when the gear position 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 ejecting bar 21 sequentially triggers the inner sampling assembly 31 and the outer sampling assembly 32.

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

The full-automatic mode firing process comprises the following steps: 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, the ejection strip 21 moves along the gun body outer shell 5, the first firing buckle 24 and the second firing buckle 25 continuously and sequentially unlock the needle fixing piece 312 and the tube fixing piece 322, the inner core needle 311 moves in the direction extending out of the gun body outer shell 5 to be inserted into a sampling part for sampling, and the outer cutting tube 321 cuts the sampling part along the outer part of the inner core needle 311.

The working process is as follows:

the method comprises the following steps: 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, the first clamping block 431 is clamped into the first clamping groove 432, the second clamping block 456 is clamped into the second clamping groove 457, and the projections of the first rotation prevention block 451 and the second rotation prevention block 452 along the radial plane of the sleeve 42 have an overlapping part.

Step two: gear engaging: the movable plate 16 is moved in the housing by the movable engaging housing 11, the first elastic member 14 and the second elastic member 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 in the direction of extending into the gun body housing 5. When the moving plate 16 moves, and the first inclined surface 19 at the end part of the moving plate contacts with the second inclined surface 66 at the bottom of the locking piece 61, the gear adjusting protrusion 64 matches with the first adjusting groove 651, the third button is pushed to be clamped on the first positioning surface 611, and the firing unit 2 is in an anti-error firing state; the first rotation prevention block 451 and the second rotation prevention block 452 are arranged in a staggered manner by pressing the reset button 410 while pulling the gear engaging housing 11, so that the tube fixing member 322 can move along the gun body housing 5 when engaging gear;

step three: triggering and sampling: reset button 410 is in the state of pressing down when percussion sampling, through side percussion portion 22 or back percussion portion 23 with launch strip 21 along rifle body shell 5 removal, sampling subassembly 31 and outer sampling subassembly 32 in the percussion in proper order, and when interior sampling subassembly 31 was struck, inner core needle 311 pricked tissue sample department, when outer sampling subassembly 32 was struck, outer tangent tube 321 cuted the outer tissue sample of interior sampling subassembly 31, and the percussion sampling has two kinds of situations of semi-automatic mode and full-automatic mode.

Step four: gun retreating: the reset button 410 rebounds to the initial position, the projection of the first rotation prevention block 451 and the second rotation prevention block 452 along the radial plane of the sleeve 42 has an overlapping portion, the first connecting piece 45 is connected with the second connecting piece 46, the gun body housing 5 is rotated to enable the first fixture 431 to move out of the first clamping groove 432, the second fixture 456 to move out of the second clamping groove 457, and the gun body housing 5 integrally withdraws from the sampling part; rotating the gun body housing 5 to withdraw the whole gun body housing 5 from the sampling position;

step five: ablation: pressing the on/off switch 412 energizes the conductive ring 411, which raises the temperature of the tissue in its covered area, deactivating local cells.

Above-mentioned technical scheme has only embodied the utility model discloses technical scheme's preferred technical scheme, some changes that this technical field's technical personnel probably made to some parts wherein have all embodied the utility model discloses a principle belongs to within the protection scope of the utility model.

Claims (10)

1. The gun withdrawing type biopsy ablation gun is characterized by comprising a gear engaging 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 engaging 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);

ablation unit (4) include ablation subassembly (41), sleeve pipe (42), first rotatory joint subassembly (43), prevent changeing subassembly (44) and first connecting piece (45), sleeve pipe (42) with rifle body shell (5) can be dismantled and be connected, first rotatory joint subassembly (43) are used for connecting rifle body shell (5) with sleeve pipe (42), sleeve pipe (42) inside is equipped with first connecting piece (45), prevent changeing subassembly (44) and be used for the restriction sleeve pipe (42) with relative rotation between first connecting piece (45).

2. The gun-withdrawing 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) are coaxially arranged, the outer sampling assembly (32) comprises an outer cutting tube (321) and a tube holder (322), and the outer cutting tube (321) is fixedly connected with the tube holder (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 outer cutting tube (321), the inner core needle (311) and the outer cutting tube (321) are coaxially arranged, and a sampling notch is formed in the tail end of the inner core needle (311).

3. The gun-withdrawing biopsy ablation gun according to claim 1, wherein the first rotary clamping assembly (43) comprises a first clamping block (431) fixed at the end of the gun body housing (5) and a first clamping groove (432) opened on 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 withdrawing type biopsy ablation gun as claimed in claim 2, wherein the rotation preventing assembly (44) comprises a first connecting piece (45), a second connecting piece (46), a first rotation preventing block (451), a second rotation preventing block (452), a resetting frame (47), a resetting 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), the resetting frame (47) is erected on the second connecting piece (46) and can move along the sliding channel (453), a resetting button (410) and a resetting elastic piece (48) are respectively fixed to two end portions of the resetting frame (47), the clamping ring (49) is sleeved outside the second connecting piece (46), and the clamping ring (49) is fixedly connected with the sleeve (42).

5. The gun withdrawing 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 rotation prevention 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 rotation prevention block (451) is inserted into the clamping groove (455), a second rotation prevention block (452) is fixed on the side wall of the reset frame (47), the first rotation prevention block (451) and the second rotation prevention block (452) are staggered with each other in a first state, and the first rotation prevention block (451) and the second rotation prevention block (452) have an overlapping portion in the projection of the radial plane of the sleeve (42) in a second state.

6. The gun withdrawing type biopsy ablation gun according to claim 5, wherein a second locking groove (457) is formed on the first connecting member (45), a second locking block (456) is fixed on the tube fixing member (322), and the second locking block (456) is matched with the second locking groove (457).

7. The gun withdrawing type 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 member (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).

8. The gun withdrawing type biopsy ablation gun according to claim 2, wherein the firing unit (2) comprises an ejection bar (21), a side firing part (22), 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 housing (5) and can slide along the gun body housing (5), the side firing part (22) and the rear firing part (23) are both fixedly connected with the ejection bar (21), the side firing part (22) is arranged at the side of the gun body housing (5), the rear firing part (23) is arranged at the end of the gun body housing (5), and the first firing buckle (24) and the second firing buckle (25) are both rotatably connected with the gun body housing (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 rear 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).

9. The gun-withdrawing biopsy ablation gun according to claim 8, further comprising a mode switching unit (6), wherein the mode switching unit (6) comprises 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) and the third button is disposed 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) matched with the gear adjusting protrusion (64) are disposed 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 matched with the concave structures (65) at different heights.

10. The gun-backing biopsy ablation gun according to claim 9, wherein the recessed structure (65) comprises a first adjustment groove (651), a second adjustment groove (652) and a third adjustment groove (653), and the locking member (61) has a first positioning surface (611), a second positioning surface (612) and a through 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-error triggering 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 position 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 penetrates through the through hole (613) when the third button is pressed, and the ejection strip (21) sequentially triggers the inner sampling assembly (31) and the outer sampling assembly (32).

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