CN112842418A

CN112842418A - Biological tissue specimen taking-out device for laparoscopic surgery

Info

Publication number: CN112842418A
Application number: CN202110245074.1A
Authority: CN
Inventors: 周承汇; 卢礼卿; 李年丰; 赵越
Original assignee: Individual
Current assignee: Xiangya Hospital of Central South University
Priority date: 2021-03-05
Filing date: 2021-03-05
Publication date: 2021-05-28
Anticipated expiration: 2041-03-05
Also published as: CN112842418B

Abstract

The invention relates to the field of medical equipment, in particular to a device for taking out biological tissue specimens for laparoscopic surgery, comprising a laparoscopic sleeve and a ventilation pipeline, which is used to pick up the laparoscopic sleeve cut by surgical forceps. For biological tissue specimens, one end of the ventilation pipe is provided with a cuff on the outer side wall, the inner wall of one end of the ventilation pipe close to the cuff is provided with a barb mechanism to prevent the biological tissue from falling off, and one end of the ventilation pipe close to the cuff is provided with a side wall for A suction mechanism for absorbing blood and water, the suction mechanism and the barb mechanism are drive-connected. The device for taking out biological tissue specimens for laparoscopic surgery is convenient for taking out a large volume of biological tissue, and prevents the biological tissue from falling from the ventilation duct, and prevents the fallen biological tissue from possibly containing tumor cells, thereby causing tumors It can improve the reliability of biological tissue extraction and maintain the integrity of the specimen as much as possible during the process of specimen collection.

Description

Biological tissue specimen taking-out device for laparoscopic surgery

Technical Field

The invention relates to the field of medical equipment, in particular to a biological tissue specimen taking-out device for laparoscopic surgery.

Background

In the existing tool for taking out the specimen in the laparoscopic surgery, a sterile bag is generally adopted to take out the biological tissue cut by the surgical forceps in the laparoscopic surgery, in the process, blood and water cannot be cleaned, so that the position of the biological tissue cannot be clearly seen, in addition, because the incision is small, the steel wire and the sterile bag are inconvenient to go deep into the body, in addition, when the cut biological tissue is large, the surgical forceps cannot be completely cut off at a time, so that the cut biological tissue cannot be fixedly pulled, and the next cutting operation is inconvenient.

Disclosure of Invention

The present invention is directed to a biological tissue specimen retrieval device for laparoscopic surgery to solve the problems set forth in the background art. In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a biological tissue sample remove device for laparoscopic surgery, includes the peritoneoscope sleeve pipe, still includes vent pipe, vent pipe is used for picking up the biological tissue sample that the surgical forceps cut on the peritoneoscope sleeve pipe, be provided with the hoop on vent pipe's the one end lateral wall, and the hoop can cup joint and sliding connection on the peritoneoscope sleeve pipe, vent pipe keeps away from the urceolus that the one end of hoop has the solid-liquid separation function through pipe connection, vent pipe is provided with the barb mechanism that is used for preventing biological tissue to drop near being close to on the one end inner wall of hoop, vent pipe sets up the suction mechanism that is used for absorbing the bloody water near the one end lateral wall of hoop, suction mechanism is connected with barb mechanism transmission.

Preferably, the suction mechanism is including seting up the annular one on the air pipe inner wall, set up a plurality of through-holes that are used for pumping the blood on the inner wall of annular one, it is a plurality of the through-hole sets up along the equidistant interval of circumference trend, the through-hole sets up on the one end inner wall of pipe is kept away from to annular one, sliding connection has the sliding sleeve in the annular one, the internal diameter of sliding sleeve is not less than air pipe's internal diameter, the lateral wall of sliding sleeve and the inner wall laminating contact of annular one, the sliding sleeve can be to a plurality of the through-hole shutoff.

Preferably, the suction mechanism further comprises grooves formed in the inner wall of the ventilation pipeline, at least two grooves are formed in the grooves at equal intervals along the circumferential direction, the grooves are located at one end, away from the guide pipe, of the first annular groove and are communicated with the first annular groove, and the direction of the grooves is parallel to the direction of the central axis of the ventilation pipeline.

Preferably, the one end dead axle that keeps away from annular one in the recess rotates and is connected with the gear, and the gear is connected with barb mechanism transmission, fixed connection connecting rod one on the gear, the one end of the articulated connecting rod two of one end that the gear was kept away from to connecting rod one, the one end that connecting rod one was kept away from to connecting rod two is articulated with the inside wall of sliding sleeve, connecting rod two is connected through the inner wall middle part of spring one with the link of connecting rod one.

Preferably, a convex ring is fixed on the top wall of the inner portion of the outer barrel, an inner barrel is arranged inside the outer barrel, the inner barrel is a filter barrel column barrel, the upper end of the inner barrel is in an open shape, the outer side wall of an upper port of the inner barrel can be in threaded connection with the inner wall of the convex ring, one end, far away from the vent pipe, of the conduit is fixed and communicated with the upper end wall of the outer barrel, and one end, far away from the vent pipe, of the conduit is located on the inner side of the upper port of.

Preferably, the lower port of the outer barrel is open, the lower end of the inner barrel is fixedly connected with a bottom cover, the upper end of the bottom cover can be in threaded connection with the lower port of the outer barrel, the upper end of the outer side wall of the outer barrel is connected with the negative pressure pump through an air suction pipe, and the lower end of the outer side wall of the outer barrel is fixed and communicated with a liquid discharge pipe.

Preferably, the hoop is cylindrical, a notch is formed in one side, away from the ventilation pipeline, of the hoop along the direction of the central axis of the shaft, the hoop is made of metal reeds, and the hoop can rotate on the laparoscope sleeve.

Preferably, a sliding seat is fixed on the outer side wall of one end, far away from the catheter, of the vent pipe, a sliding rod is fixed in the sliding seat and parallel to the central axis of the vent pipe, a sliding block is connected in the sliding seat in a sliding mode, the sliding rod penetrates through and is connected to the sliding block in a sliding mode, and two ends of the sliding block are connected with two ends of the sliding seat through a third spring.

Preferably, barb mechanism is including seting up spout one on the vent pipe lateral wall, and spout one and the corresponding and mutual parallel arrangement of recess, sliding connection has the rack in the spout one, set up the logical groove that is linked together with spout one on the recess inner wall, the gear passes logical groove and is connected with the rack toothing that corresponds, the one end that the annular was kept away from to the rack is the wedge form, and the wedge face is towards vent pipe's inside.

Preferably, the barb mechanism also comprises a second sliding groove which is arranged on the inner wall of the ventilation pipeline and corresponds to the first sliding groove, the second sliding groove is positioned at the port of the vent pipeline and is vertical to the central axis of the vent pipeline, the second sliding chute is communicated with the first sliding chute and the ventilation pipeline, a second annular groove is arranged on the inner wall of the second sliding chute, a sliding plate is connected in the second ring groove in a sliding manner, the sliding plate is connected with one end of the second ring groove, which points to the inside of the ventilation pipeline, through a second spring, a sliding rod is connected in the second sliding groove in a sliding manner, the sliding rod penetrates through and is fixedly connected with the sliding plate, two ends of the sliding rod are in a wedge shape, the two wedge-shaped surfaces are oppositely arranged, the wedge-shaped surface at one end of the sliding rod, which points to the inside of the vent pipe, faces the outside of the port of the vent pipe, the wedge-shaped surface of the rack is in abutting contact with the wedge-shaped surface of one end of the sliding rod, which is far away from the interior of the ventilation pipeline, and can slide relatively.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the blood water at the surgical forceps position on the laparoscope sleeve is cleaned in real time through the vent pipeline, so that laparoscopic surgery operation is facilitated, the success rate of the surgery is improved, the separation of the biological tissue and the blood water is realized through the inner cylinder and the outer cylinder, the biological tissue with small volume is prevented from being discharged along with the blood water, and the biological tissue is effectively obtained.

According to the invention, the large-volume biological tissue is adsorbed and pulled through the vent pipe, so that the surgical forceps are facilitated to gradually shear the biological tissue along the shearing position, the large-volume biological tissue is convenient to take out, the barb mechanism is driven by the suction mechanism to improve the adsorption stability of the large-volume biological tissue, the biological tissue is prevented from falling off the vent pipe, tumor cells are prevented from possibly being contained in the falling biological tissue, the tumor is prevented from being planted and transferred, the biological tissue taking-out reliability is improved, and the integrity of a specimen can be kept as much as possible in the specimen taking process;

in the invention, the sliding block on the hoop sleeve is connected with the sliding seat through the spring III, so that the vibration generated in the suction and moving processes of the ventilation pipeline is buffered, the stability of the laparoscopic cannula during operation is maintained, and the accuracy of the operation is improved.

Drawings

FIG. 1 is a schematic view of the final assembly of the present invention;

FIG. 2 is a first schematic sectional view of an end portion of an air duct according to the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 2;

FIG. 4 is a schematic view of a cross-sectional structure of an end portion of an air duct according to the present invention;

FIG. 5 is an enlarged view of the structure at B in FIG. 4;

FIG. 6 is a side view of the structure of the ferrule of the present invention;

fig. 7 is a schematic view of the cross-sectional structure C-C of fig. 6.

In the figure: 1. a laparoscopic cannula; 2. an air duct; 3. a conduit; 4. an outer cylinder; 5. an inner barrel; 6. a bottom cover; 7. a convex ring; 8. an air intake duct; 9. a liquid discharge pipe; 10. a hoop sleeve; 11. a first ring groove; 12. a through hole; 13. a sliding sleeve; 14. a groove; 15. a first connecting rod; 16. a first spring; 17. a second connecting rod; 18. a gear; 19. a through groove; 20. a first sliding chute; 21. a rack; 22. a second chute; 23. a slide bar; 24. a second ring groove; 25. a slide plate; 26. a second spring; 27. a slide base; 28. a slide bar; 29. a slider; 30. and a third spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by workers skilled in the art without any inventive work based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1 to 7, the present invention provides a technical solution: the utility model provides a biological tissue sample remove device for laparoscopic surgery, includes peritoneoscope sleeve pipe 1, still includes vent pipe 2, vent pipe 2 is used for picking up the biological tissue sample that the surgical forceps cut off on the peritoneoscope sleeve pipe 1, be provided with the cuff 10 on vent pipe 2's the one end lateral wall, and the cuff 10 can cup joint and sliding connection on peritoneoscope sleeve pipe 1, vent pipe 2 keeps away from the urceolus 4 that the one end of cuff 10 is passed through the pipe 3 and is connected and have the solid-liquid separation function, vent pipe 2 is provided with the barb mechanism that is used for preventing that biological tissue drops on being close to the one end inner wall of cuff 10, vent pipe 2 sets up the suction mechanism who is used for absorbing the bloody water on being close to the one end lateral wall of cuff 10, suction mechanism and barb mechanism transmission.

In this embodiment, suction mechanism is including seting up annular 11 on vent pipe 2 inner wall, set up a plurality of through-holes 12 that are used for pumping the bloody water on the inner wall of annular 11, it is a plurality of through-hole 12 sets up along circumference trend equidistant, through-hole 12 sets up on the one end inner wall of pipe 3 is kept away from at annular 11, sliding connection has sliding sleeve 13 in annular 11, sliding sleeve 13's internal diameter is not less than vent pipe 2's internal diameter, sliding sleeve 13's lateral wall and annular 11's inner wall laminating contact, sliding sleeve 13 can be to a plurality of through-hole 12 shutoff.

In this embodiment, the suction mechanism further comprises grooves 14 formed in the inner wall of the vent pipe 2, at least two grooves 14 are arranged at equal intervals along the circumferential direction, the grooves 14 are located at one end, away from the guide pipe 3, of the first ring groove 11 and are communicated with the first ring groove 11, and the direction of the grooves 14 is parallel to the direction of the central axis of the vent pipe 2.

In this embodiment, the one end dead axle that keeps away from annular 11 in recess 14 rotates and is connected with gear 18, and gear 18 is connected with barb mechanism transmission, fixed connection connecting rod one 15 on the gear 18, the one end of the articulated connecting rod two 17 of gear 18's one end is kept away from to connecting rod one 15, connecting rod two 17 keep away from the one end of connecting rod one 15 and articulate with the inside wall of sliding sleeve 13, the connecting end of connecting rod two 17 and connecting rod one 15 is connected through the inner wall middle part of spring 16 with recess 14.

In this embodiment, a protruding ring 7 is fixed on the top wall of the inner portion of the outer cylinder 4, an inner cylinder 5 is arranged inside the outer cylinder 4, the inner cylinder 5 is a cylinder of a filter cartridge, the upper end of the inner cylinder 5 is in an open shape, the outer side wall of the upper port of the inner cylinder 5 can be connected to the inner wall of the protruding ring 7 in a threaded manner, one end of the conduit 3, which is far away from the vent pipe 2, is fixed and communicated with the upper end wall of the outer cylinder 4, and one end of the conduit 3, which is far away from the vent pipe 2, is located on the.

In this embodiment, the lower port of the outer cylinder 4 is open, the lower end of the inner cylinder 5 is fixedly connected with the bottom cover 6, the upper end of the bottom cover 6 can be connected to the lower port of the outer cylinder 4 in a threaded manner, the upper end of the outer side wall of the outer cylinder 4 is connected with the negative pressure pump through the air suction pipe 8, the negative pressure pump is not shown in the application, and the lower end of the outer side wall of the outer cylinder 4 is fixed and communicated with the drainage pipe 9.

In this embodiment, the hoop 10 is cylindrical, a notch is formed in one side of the hoop 10 away from the ventilation pipeline 2 along the direction of the central axis of the shaft, the hoop 10 is made of a metal reed, and the hoop 10 can rotate on the laparoscope casing 1.

In this embodiment, a sliding seat 27 is fixed on an outer side wall of one end of the ventilation pipeline 2 far away from the catheter 3, a sliding rod 28 is fixed in the sliding seat 27, the sliding rod 28 is parallel to a central axis of the ventilation pipeline 2, a sliding block 29 is slidably connected in the sliding seat 27, the sliding rod 28 penetrates through and is slidably connected to the sliding block 29, and two ends of the sliding block 29 are connected with two ends of the sliding seat 27 through a spring three 30.

In this embodiment, barb mechanism is including seting up spout one 20 on vent pipe 2 lateral wall, and spout one 20 and recess 14 corresponding and mutual parallel arrangement, sliding connection has rack 21 in spout one 20, set up the logical groove 19 that is linked together with spout one 20 on the recess 14 inner wall, gear 18 passes logical groove 19 and is connected with the meshing of corresponding rack 21, the one end that annular one 11 was kept away from to rack 21 is the wedge, and the wedge is towards vent pipe 2's inside.

In this embodiment, barb mechanism is still including seting up on vent pipe 2 inner wall and with two 22 of the corresponding spout of spout one 20, two 22 of spouts are located vent pipe 2 port department, two 22 of spouts are mutually perpendicular with vent pipe 2's the central axis, and two 22 of spouts are linked together with spout one 20 and vent pipe 2, annular two 24 has been seted up on two 22 of spouts's the inner wall, sliding connection has slide 25 in the annular two 24, slide 25 is connected with the one end in the directional vent pipe 2 of annular two 24 through two 26 springs, sliding connection has slide bar 23 in two 22 of spouts, slide bar 23 runs through and fixed connection slide 25, the both ends of slide bar 23 are the wedge, and two wedge orientations set up oppositely, the inside one end wedge orientation vent pipe 2's of slide bar 23 port outside vent pipe 2, the wedge of rack 21 supports to detain the contact and the contact with the inside one end wedge orientation of slide bar 23 deviating from vent pipe 2 and supports to detain and contact and slide bar 23 Can slide relatively.

The use method and the advantages of the invention are as follows: when the biological tissue specimen taking-out device for laparoscopic surgery is used, the working process is as follows:

as shown in fig. 1 and 6, the cuff 10 can be sleeved on the outer sidewall of the laparoscopic cannula 1 by deformation of the notch, and can also be taken down from the outer sidewall of the laparoscopic cannula 1 by deformation of the notch, so that the assembly and disassembly of the vent pipe 2 and the laparoscopic cannula 1 are facilitated, the structure is simple, and the operation is convenient.

When the biological tissues cut off by the surgical forceps in the laparoscopic surgery are taken out, the vent pipeline 2 is assembled and connected with the laparoscopic cannula 1 through the hoop sleeve 10, and in an initial state, as shown in fig. 2 and 3, an included angle between the first connecting rod 15 and the second connecting rod 17 is reduced under the action of the first spring 16, the through hole 12 is blocked by the sliding sleeve 13, and meanwhile, the sliding rod 23 is positioned in the second sliding groove 22 and cannot extend out under the action of the second spring 26.

The laparoscope cannula 1 is started and the negative pressure pump is started, the air duct 2 and the laparoscope cannula 1 are extended into the body from the incision, the blood at the front end of the laparoscope cannula 1 is completely sucked by the air suction pipe 8, the outer cylinder 4, the conduit 3 and the air duct 2 when the negative pressure pump works, thereby facilitating the laparoscopic surgery operation, being beneficial to improving the success rate of the surgery, meanwhile, the biological tissue cut off by the surgical forceps can be sucked and picked up in time by the air duct 2 and enters the inner cylinder 5 through the air duct 2 and the conduit 3, so that the biological tissue is stored in the inner cylinder 5, the blood flows out through the meshes on the peripheral wall of the inner cylinder 5 and is discharged through the liquid discharge pipe 9, thereby realizing the separation of the biological tissue and the blood, avoiding the small-volume biological tissue from being discharged together with the blood, thereby effectively obtaining the biological tissue, after the operation, take off inner tube 5 from bulge loop 7 simultaneously through screwing off bottom 6, then with biological tissue from the inner tube 5 in take out can to inner tube 5 and urceolus 4 adopt removable setting, are convenient for wash disinfection processing, very convenient, the equipment of also being convenient for to inner tube 5 and urceolus 4.

As shown in fig. 4 and 5, when encountering a biological tissue with an enlarged volume, the forceps on the laparoscopic cannula 1 need to cut the biological tissue many times, at this time, the biological tissue is sucked through the port of the vent pipe 2 and pulled, since the cuff 10 can slide on the laparoscopic cannula 1, the vent pipe 2 and the laparoscopic cannula 1 can move in opposite directions, thereby facilitating the forceps to gradually cut the biological tissue along the cut, and after the cutting of the biological tissue is finished, the cut biological tissue can be taken out of the incision through the vent pipe 2, the operation is convenient, and the vent pipe 2 and the laparoscopic cannula 1 are respectively taken out of the incision, thereby avoiding opening the incision, and avoiding increasing the pain of a patient.

When the vent pipe 2 aspirates massive biological tissue, the biological tissue exerts thrust to the connecting rod one 15, thereby make the contained angle grow of connecting rod one 15 and connecting rod two 17, and compress spring one 16, make spring one 16 obtain a resilience, in the process of the contained angle grow of connecting rod one 15 and connecting rod two 17, make connecting rod two 17 exert thrust to sliding sleeve 13, thereby make sliding sleeve 13 not the shutoff to through-hole 12, thereby make the bloody water can follow through-hole 12 and get into in the vent pipe 2 and discharge, thereby keep in real time can clear up the bloody water of peritoneoscope sleeve pipe 1 department, improve the accuracy of operation pincers when shearing biological tissue.

As described above, the timing gear 18 rotates counterclockwise in fig. 5 while the angle between the first link 15 and the second link 17 is increased, so that the gear 18 drives the rack 21 to move towards the second sliding chute 22, thrust is applied to the corresponding wedge-shaped end on the sliding rod 23 through the wedge-shaped end of the rack 21, the sliding rod 23 slides towards the ventilation pipeline 2 to form a barb, and synchronously drives the sliding plate 25 to compress the second spring 26, so that the second spring 26 obtains a restoring force, after the sliding rod 23 slides into the ventilation pipeline 2, the adsorption of biological tissue is enhanced by the wedge-shaped end of the slide bar 23 pointing into the airway tube 2, thereby preventing the biological tissue from falling off the ventilation pipe 2, preventing the falling biological tissue from possibly containing tumor cells, thereby causing the implantation and the metastasis of the tumor, improving the reliability of taking out the biological tissue and keeping the integrity of the specimen as much as possible in the process of taking the specimen.

As shown in FIG. 7, since the slider 29 of the cuff 10 is connected to the slider 27 through the spring III 30, the ventilation tube 2 is buffered during suction and vibration generated during movement, thereby maintaining stability of the laparoscopic cannula 1 during operation and contributing to an improvement in the accuracy of the surgical operation.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A device for taking out biological tissue specimens for laparoscopic surgery, comprising a laparoscopic sleeve (1), characterized in that: further comprising a ventilation duct (2), the ventilation duct (2) being used to pick up the laparoscopic sleeve A biological tissue specimen cut by surgical forceps on the tube (1), a cuff (10) is provided on the outer side wall of one end of the ventilation pipe (2), and the cuff (10) can be sleeved and slidably connected to the laparoscope On the casing (1), one end of the ventilation pipe (2) away from the cuff (10) is connected to an outer cylinder (4) with a solid-liquid separation function through a conduit (3), and the ventilation pipe (2) is close to the cuff The inner wall of one end of (10) is provided with a barb mechanism for preventing biological tissue from falling off, and a suction mechanism for absorbing blood and water is provided on the side wall of one end of the ventilation pipe (2) close to the cuff (10). The suction mechanism is in driving connection with the barb mechanism.

2. A biological tissue specimen extraction device for laparoscopic surgery according to claim 1, characterized in that: the suction mechanism comprises a ring groove one (11) opened on the inner wall of the ventilation pipe (2), The inner wall of the first ring groove (11) is provided with a plurality of through holes (12) for sucking blood and water, and the plurality of through holes (12) are arranged at equal intervals along the circumferential direction, and the through holes (12) It is arranged on the inner wall of one end of the ring groove one (11) away from the conduit (3), and a sliding sleeve (13) is slidably connected in the ring groove one (11). 2), the outer side wall of the sliding sleeve (13) is in contact with the inner wall of the first ring groove (11), and the sliding sleeve (13) can block a plurality of the through holes (12).

3. A biological tissue specimen extraction device for laparoscopic surgery according to claim 2, characterized in that: the suction mechanism further comprises a groove (14) opened on the inner wall of the ventilation pipe (2), The grooves (14) have at least two and are arranged at equal intervals along the circumference. The grooves (14) are located at the end of the first ring groove (11) away from the conduit (3) and communicate with the first ring groove (11). , the direction of the groove (14) is parallel to the direction of the central axis of the ventilation pipe (2).

4 . The biological tissue specimen extraction device for laparoscopic surgery according to claim 3 , wherein a gear is rotatably connected to one end of the groove ( 14 ) away from the first ring groove ( 11 ). 5 . (18), and the gear (18) is drivingly connected with the barb mechanism, a connecting rod (15) is fixedly connected to the gear (18), and the connecting rod (15) is hinged at one end of the connecting rod (15) away from the gear (18). One end of the second link (17), the end of the second link (17) away from the first link (15) is hinged with the inner side wall of the sliding sleeve (13), and the second link (17) is connected to the first link (15) The connecting end of the groove (14) is connected with the middle of the inner wall of the groove (14) through a spring (16).

5. A biological tissue specimen extraction device for laparoscopic surgery according to claim 1, characterized in that: a convex ring (7) is fixed on the inner top wall of the outer cylinder (4), and the outer cylinder (4) is fixed with a convex ring (7). (4) is provided with an inner cylinder (5), the inner cylinder (5) is a filter cylinder cylinder, the upper end of the inner cylinder (5) is open, and the outer side wall of the upper port of the inner cylinder (5) It can be screwed on the inner wall of the convex ring (7), one end of the conduit (3) away from the ventilation duct (2) is fixed and communicated with the upper end wall of the outer cylinder (4), and the conduit (3) is away from the ventilation duct (2) One end is located inside the upper port of the inner cylinder (5).

6. A biological tissue specimen extraction device for laparoscopic surgery according to claim 5, characterized in that: the lower port of the outer cylinder (4) is open-shaped, and the lower end of the inner cylinder (5) is in the shape of an opening. The bottom cover (6) is fixedly connected, the upper end of the bottom cover (6) can be threadedly connected to the lower port of the outer cylinder (4), and the upper end of the outer side wall of the outer cylinder (4) is connected to the negative through the suction pipe (8). The lower end of the outer side wall of the outer cylinder (4) is fixed and communicated with the drain pipe (9).

7 . The biological tissue specimen extraction device for laparoscopic surgery according to claim 1 , wherein the cuff ( 10 ) is cylindrical, and the cuff ( 10 ) faces away from the ventilation pipe ( 2 ). 8 . ) is provided with a gap along the direction of the central axis of the shaft, the hoop (10) is made of metal reeds, and the hoop (10) can be rotated on the laparoscopic sleeve (1).

8. A biological tissue specimen extraction device for laparoscopic surgery according to claim 7, characterized in that: a sliding seat (27) is fixed on the outer side wall of one end of the ventilation pipe (2) away from the catheter (3). ), a sliding rod (28) is fixed in the sliding seat (27), and the sliding rod (28) is parallel to the central axis of the ventilation duct (2), and the sliding block (29) is slidably connected in the sliding seat (27). ), the sliding rod (28) penetrates and is slidably connected to the sliding block (29), and the two ends of the sliding block (29) are connected to the two ends of the sliding seat (27) through the spring three (30).

9. A biological tissue specimen extraction device for laparoscopic surgery according to claim 4, characterized in that: the barb mechanism comprises a chute one (20) provided on the side wall of the ventilation duct (2). , and the first chute (20) corresponds to the groove (14) and is arranged parallel to each other, the first chute (20) is slidably connected with a rack (21), and the inner wall of the groove (14) is provided with A through slot (19) communicated with the first chute (20), the gear (18) is engaged with the corresponding rack (21) through the through slot (19), and the rack (21) is away from the ring groove One end of one (11) is wedge-shaped, and the wedge-shaped surface faces the interior of the ventilation duct (2).

10. A device for taking out biological tissue specimens for laparoscopic surgery according to claim 9, characterized in that: the barb mechanism further comprises a barb mechanism arranged on the inner wall of the ventilation pipe (2) and connected to the first chute (20). ) corresponding to the second chute (22), the second chute (22) is located at the port of the ventilation duct (2), the second chute (22) is perpendicular to the central axis of the ventilation duct (2), and slides The second groove (22) is communicated with the first chute (20) and the ventilation pipe (2). The inner wall of the second sliding groove (22) is provided with a second ring groove (24), and the second ring groove (24) A sliding plate (25) is slidably connected, and the sliding plate (25) is connected to one end of the second ring groove (24) pointing into the ventilation pipe (2) through the second spring (26), and the second sliding groove (22) is slidably connected There is a sliding rod (23), the sliding rod (23) penetrates and is fixedly connected to the sliding plate (25), both ends of the sliding rod (23) are wedge-shaped, and the two wedge-shaped surfaces are arranged in opposite directions, and the sliding rod (23) is arranged in opposite directions. One end of the rod (23) pointing to the inside of the ventilation duct (2) has a wedge-shaped surface facing the outside of the port of the ventilation duct (2), and the wedge-shaped surface of the rack (21) and the end of the sliding rod (23) facing away from the interior of the ventilation duct (2) The wedge-shaped surfaces are in contact and can slide relative to each other.