阅读说明：本技术 一种可用于腔镜手术的多通道穿刺器 (Multi-channel puncture outfit for endoscopic surgery ) 是由 刘浩 张芳敏 周圆圆 郭明全 王重阳 何啸 于 2020-06-19 设计创作，主要内容包括：本发明属于医疗器械领域,具体地是一种可用于腔镜手术的多通道穿刺器,穿刺管座的一端固接于穿刺管的一端,穿刺管座另一端与旋转环及卡接件连接后的整体转动连接,穿刺管座上安装有注气阀；导向座、密封盖及阻气阀座依次相连,阻气阀安装于阻气阀座内,阻气阀上具有多个阻气阀体,导向片插设于阻气阀座上,导向片在穿刺芯组件插入穿刺管组件内后与穿刺管内壁之间形成和阻气阀体数量相同、一一对应的独立通道；导向座上开设有与阻气阀体数量相同、一一对应的导向槽,每个导向槽的底部及相对应的导向槽和阻气阀体之间的密封盖上均开设有通孔；导向座通过弹性卡接装置与卡接件的一端连接。本发明具有适应性好,空间集成度高等优点。(The invention belongs to the field of medical instruments, in particular to a multi-channel puncture outfit for endoscopic surgery, wherein one end of a puncture tube seat is fixedly connected with one end of a puncture tube, the other end of the puncture tube seat is integrally and rotatably connected with a rotating ring and a clamping piece after being connected, and an air injection valve is arranged on the puncture tube seat; the puncture core assembly is inserted into the puncture tube assembly, and independent channels which are the same as the number of the air blocking valve bodies and correspond to the number of the air blocking valve bodies one by one are formed between the guide sheet and the inner wall of the puncture tube; the guide seat is provided with guide grooves which are the same as the gas barrier valve bodies in number and correspond to the gas barrier valve bodies one by one, and the bottom of each guide groove and the sealing cover between the corresponding guide groove and the gas barrier valve body are provided with through holes; the guide seat is connected with one end of the clamping piece through the elastic clamping device. The invention has the advantages of good adaptability, high space integration level and the like.)

1. The utility model provides a can be used to multichannel puncture ware of laparoscopic surgery which characterized in that: the puncture cannula assembly comprises a puncture cannula assembly (1), and a puncture rod (2) and a puncture core assembly (3) which can be inserted into the puncture cannula assembly (1), wherein the puncture cannula assembly (1) comprises a puncture tube (101), a puncture tube seat (102), an air injection valve (103), a rotating ring (105) and a clamping assembly (106), the rotating ring (105) is connected with the clamping assembly (106), one end of the puncture tube seat (102) is fixedly connected with one end of the puncture tube (101), the other end of the puncture tube seat (102) is integrally and rotatably connected with the rotating ring (105) and the clamping assembly (106) after connection, and the puncture tube seat (102) is provided with the air injection valve (103); the puncture core assembly (3) comprises a guide plate (301), a gas barrier valve (302), a gas barrier valve seat (303), a sealing cover (305) and a guide seat (306), the sealing cover (305) and the gas barrier valve seat (303) are sequentially connected, the gas barrier valve (302) is installed in the gas barrier valve seat (303), the gas barrier valve (302) is provided with a plurality of gas barrier valve bodies (316), the guide plate (301) is inserted into the gas barrier valve seat (303), and the guide plate (301) forms independent channels (310) which are the same in number and correspond to the gas barrier valve bodies (302) one by one with the inner wall of the puncture tube (101) after the puncture core assembly (3) is inserted into the puncture tube assembly (1); the guide seat (306) is provided with guide grooves (311) which are the same as the air blocking valve bodies (302) in number and correspond to the air blocking valve bodies one by one, and the bottom of each guide groove (311) and a sealing cover (305) between the corresponding guide groove (311) and the air blocking valve body (302) are provided with through holes; the guide seat (306) is connected with one end of the clamping piece (106) through an elastic clamping device.

2. The multi-channel puncture outfit for endoscopic surgery according to claim 1, characterized in that: one side of the axial section of the rotating ring (105) is L-shaped, the other end of the clamping piece (106) is radially retracted inwards to form a spigot, and the L-shaped vertical edge is abutted to the spigot; the other end edge of the puncture tube seat (102) is outwards provided with a flanging (110), and the flanging (110) is accommodated between the other end part of the clamping piece (106) and the L-shaped transverse edge and can rotate relatively.

3. The multi-channel puncture outfit for endoscopic surgery according to claim 1, characterized in that: the puncture tube seat (102) is respectively provided with a connecting piece positioning groove (108) and an air injection valve mounting hole (109), the connecting piece positioning groove (108) is provided with a connecting piece (104) connected with the mechanical arm, the air injection valve (103) is arranged at the air injection valve mounting hole (109), and the air injection valve mounting hole (109) is positioned below the air blocking valve seat (303) and communicated with the independent channel (310).

4. The multi-channel puncture outfit for endoscopic surgery according to claim 1, characterized in that: the end face of the other end of the puncture tube (101) is an inclined plane, and the outer surface of the puncture tube is provided with an anti-skid part (107).

5. The multi-channel puncture outfit for endoscopic surgery according to claim 1, characterized in that: a sealing ring groove (308) is formed in the outer surface of the air blocking valve seat (303), a sealing ring is arranged in the sealing ring groove (308), and the sealing ring is inserted into the puncture tube assembly (1) and then is in sealing contact with the inner wall of the clamping piece (106); the inner wall of one end of the choke valve seat (303) is provided with a clamping groove B (309) for fixedly connecting the guide sheet (301).

6. The multi-channel puncture outfit for endoscopic surgery according to claim 1, characterized in that: the other end of the air lock valve seat (303) is provided with an inner spigot and an outer spigot respectively, the air lock valve (302) is positioned at the inner spigot, a sealing gasket (304) is arranged between the air lock valve (302) and the sealing cover (305), and through holes C (322) which are the same in number as the air lock valve bodies (316) and correspond to the air lock valve bodies one to one are formed in the sealing gasket (304).

7. The multi-channel puncture outfit for endoscopic surgery according to claim 1, characterized in that: the guide groove (311) on the guide seat (306) is funnel-shaped with a wide upper part and a narrow lower part, and a through hole A (312) is formed at the bottom of the guide groove (311); and the side wall of the guide seat (306) is provided with an ear clamping groove (313) for mounting the elastic clamping device.

8. The multi-channel puncture outfit for endoscopic surgery according to claim 1, characterized in that: the elastic clamping device is a lug (307), the side wall of the sealing cover (305) extends outwards along the radial direction to form an extending part B (314), a lug sliding groove (315) is formed in the extending part B (314), and spring limiting grooves (321) are formed in the side wall of the sealing cover (305) and the lug (307); one end of the lug plate (307) is installed on the guide seat (306), the other end of the lug plate (307) penetrates through the lug plate sliding groove (315) and is clamped with the clamping piece (106), a spring is arranged between the spring limiting groove (321) in the sealing cover (305) and the spring limiting groove (321) in the lug plate (307), and two ends of the spring are always abutted to the spring limiting groove (321) in the sealing cover (305) and the spring limiting groove (321) in the lug plate (307).

9. The multi-channel puncture outfit for endoscopic surgery according to claim 8, characterized in that: one end of the lug (307) protrudes outwards, the bottom of the protruding part abuts against the upper surface of the extension part B (314), and the other end of the lug (307) is hook-shaped.

10. The multi-channel puncture outfit for endoscopic surgery according to claim 1, characterized in that: the side wall of the clamping piece (106) extends outwards along the radial direction to form an extension part A (113), and a clamping groove A (112) for clamping the elastic clamping device is formed in the extension part A (113).

Technical Field

The invention belongs to the field of medical instruments, and particularly relates to a multi-channel puncture outfit for an endoscopic surgery, which is used for puncturing the abdominal wall of a human body to establish a surgical instrument channel for a minimally invasive surgery and can be used in a minimally invasive surgery robot system.

Background

The endoscopic surgery is to establish an operation channel in the abdominal wall of a human body by using various puncture outfits of different types by means of various technologies such as a camera system, a cold light source, an electrocoagulation system and the like so as to allow an anastomat or other surgical instruments (such as an endoscope, scissors, an electric hook, a separating clamp, a guide wire or a guide pipe and the like) to enter the abdominal cavity and provide a channel for gas to enter and exit so as to control pneumoperitoneum required by the surgery so as to perform examination or surgical operation.

In the minimally invasive laparoscopic surgery, pneumoperitoneum of the human body is required to be performed in the operation process, which is an important operation process of the laparoscopic surgery. Sufficient pneumoperitoneum expands the distance between the abdominal cavity and the viscera, and between the viscera, thereby providing a relatively wide visual field and an operation environment for an operator. With the advent of minimally invasive surgical robot systems, doctors can achieve minimally invasive, accurate, and efficient surgery with the help of the minimally invasive surgical robot systems. The single-hole endoscopic surgery is a typical minimally invasive surgery, can use an endoscope and a plurality of surgical instruments to perform complex surgical operation through a tiny incision, and has the advantages of less bleeding, light pain, quick and attractive postoperative recovery, small postoperative infection risk and the like. The traditional puncture outfit does not meet the requirement of a single-hole surgical robot system.

Disclosure of Invention

The invention aims to provide a multi-channel puncture outfit for endoscopic surgery. The multi-channel puncture outfit is suitable for a single-hole endoscopic surgery robot system, can support a plurality of surgical instruments to simultaneously penetrate through a single puncture cannula, and is sealed independently.

The purpose of the invention is realized by the following technical scheme:

the puncture cannula assembly comprises a puncture cannula assembly, a puncture rod and a puncture core assembly, wherein the puncture rod and the puncture core assembly can be inserted into the puncture cannula assembly; the puncture core assembly comprises a guide sheet, an air-blocking valve seat, a sealing cover and a guide seat, wherein the guide seat, the sealing cover and the air-blocking valve seat are sequentially connected, the air-blocking valve is arranged in the air-blocking valve seat, the air-blocking valve is provided with a plurality of air-blocking valve bodies, the guide sheet is inserted in the air-blocking valve seat, and the guide sheet forms independent channels which are the same in quantity and correspond to the air-blocking valve bodies one by one with the inner wall of the puncture tube after the puncture core assembly is inserted into the puncture tube assembly; the guide seat is provided with guide grooves which are the same as the gas-barrier valve bodies in number and correspond to the gas-barrier valve bodies one by one, and the bottom of each guide groove and the sealing cover between the corresponding guide groove and the gas-barrier valve body are provided with through holes; the guide seat is connected with one end of the clamping piece through the elastic clamping device.

Wherein: one side of the axial section of the rotating ring is L-shaped, the other end of the clamping piece is radially retracted inwards to form a spigot, and the L-shaped vertical edge is abutted against the spigot; the other end edge of the puncture tube seat is outwards provided with a flanging which is accommodated between the other end part of the clamping piece and the L-shaped transverse edge and can rotate relatively.

The puncture tube seat is respectively provided with a connecting piece positioning groove and a gas injection valve mounting hole, the connecting piece positioning groove is provided with a connecting piece connected with the mechanical arm, the gas injection valve is mounted at the gas injection valve mounting hole, and the gas injection valve mounting hole is positioned below the gas barrier valve seat and communicated with the independent channel.

The end face of the other end of the puncture tube is an inclined plane, and the outer surface of the puncture tube is provided with an anti-skid part.

A sealing ring groove is formed in the outer surface of the air-blocking valve seat, a sealing ring is arranged in the sealing ring groove, and the sealing ring is inserted into the puncture tube assembly and then is in sealing butt joint with the inner wall of the clamping piece; and a clamping groove B for fixedly connecting the guide sheet is formed in the inner wall of one end of the air-blocking valve seat.

The other end of the air-blocking valve seat is provided with an inner spigot and an outer spigot respectively, the air-blocking valve is positioned at the inner spigot, a sealing gasket is arranged between the air-blocking valve and the sealing cover, and the sealing gasket is provided with through holes C which are in one-to-one correspondence with the air-blocking valve bodies in the same number.

The guide groove on the guide seat is funnel-shaped with a wide upper part and a narrow lower part, and a through hole A is formed at the bottom of the guide groove; and the side wall of the guide seat is provided with a lug clamping groove for mounting the elastic clamping device.

The elastic clamping device is an ear piece, the side wall of the sealing cover extends outwards along the radial direction to form an extension part B, an ear piece sliding groove is formed in the extension part B, and spring limiting grooves are formed in the side wall of the sealing cover and the ear piece; one end of the lug is installed on the guide seat, the other end of the lug penetrates through the lug sliding groove and is connected with the clamping piece in a clamping mode, a spring is arranged between the spring limiting groove in the sealing cover and the spring limiting groove in the lug, and the two ends of the spring are always abutted to the spring limiting groove in the sealing cover and the spring limiting groove in the lug.

One end of the lug protrudes outwards, the bottom of the protruding part abuts against the upper surface of the extending part B, and the other end of the lug is hook-shaped.

The side wall of the clamping piece extends outwards along the radial direction to form an extension part A, and a clamping groove A for clamping the elastic clamping device is formed in the extension part A.

The invention has the advantages and positive effects that:

1. the invention can support that a plurality of surgical instruments can simultaneously pass through a single puncture cannula, and the puncture cannula is respectively sealed independently, and has the advantages of good adaptability, high space integration level and the like.

2. The puncture cannula assembly and the puncture core assembly can be quickly assembled and disassembled through the elastic clamping device by adopting a modular design; the guide sheet in the puncture core assembly and the puncture tube in the puncture cannula assembly form a plurality of independent channels, so that the interference of surgical instruments in the puncture device is avoided.

3. The guide seat in the puncture core assembly is provided with a plurality of funnel-shaped guide grooves, so that an instrument can be conveniently inserted into the puncture outfit; the puncture core assembly and the puncture cannula assembly can rotate relatively, and the micro-wound surgical robot system is more suitable for the requirements of a micro-wound surgical robot system.

Drawings

FIG. 1 is a perspective view of the assembled piercing cannula assembly and piercing core assembly of the present invention;

FIG. 2 is a front elevational view of the assembled piercing cannula assembly and piercing core assembly of the present invention;

FIG. 3 is an exploded view of the puncture core assembly of the present invention;

FIG. 4 is a perspective view of the puncture rod of the present invention inserted into a puncture cannula assembly;

FIG. 5 is a perspective view of the piercing cannula assembly of the present invention;

FIG. 6 is a perspective view of the puncture rod of the present invention;

FIG. 7 is a schematic perspective view of an injection valve of the puncture cannula assembly of the present invention;

FIG. 8 is an assembled cross-sectional view of the puncture tube base, the rotating ring and the latch assembly of the puncture cannula assembly of the present invention;

FIG. 9 is a perspective view of a bayonet of the piercing sleeve assembly of the present invention;

FIG. 10 is a perspective view of the puncture core assembly of the present invention;

FIG. 11 is a perspective view of the assembled guide and seal cap of the puncture core assembly of the present invention;

FIG. 12 is a front view of the guide of the puncture core assembly of the present invention;

FIG. 13 is a rear elevational view of the guide of the puncture core assembly of the present invention;

FIG. 14 is a perspective view of a guide base of the puncture core assembly according to the present invention;

FIG. 15 is a perspective view of a seal cap in the puncture core assembly according to the present invention;

FIG. 16 is a cross-sectional view of the seal module in the puncture core assembly according to the present invention;

FIG. 17 is a front view of the structure of the choke valve in the piercing core assembly of the present invention;

FIG. 18 is a rear elevational view of the configuration of the choke valve in the piercing core assembly of the present invention;

FIG. 19 is a schematic perspective view of a choke valve in the piercing core assembly of the present invention;

FIG. 20 is a rear elevational view of the piercing cannula assembly and the piercing core assembly of the present invention;

wherein: 1 is a puncture casing assembly, 101 is a puncture tube, 102 is a puncture tube seat, 103 is an air injection valve, 104 is a connector, 105 is a rotating ring, 106 is a clamping component, 107 is an antiskid part, 108 is a connector positioning groove, 109 is an air injection valve mounting hole, 110 is a flanging, 111 is a valve core, 112 is a clamping groove A, and 113 is an extension part A;

2, a puncture rod, 201 a cutting edge and 202 a flange;

3 is a puncture core assembly, 301 is a guide plate, 302 is a choke valve, 303 is a choke valve seat, 304 is a sealing gasket, 305 is a sealing cover, 306 is a guide seat, 307 is a lug, 308 is a sealing ring groove, 309 is a clamping groove B, 310 is an independent channel, 311 is a guide groove, 312 is a through hole A, 313 is a lug clamping groove, 314 is an extension part B, 315 is a lug sliding groove, 316 is a choke valve body, 317 is a cross-shaped groove, 318 is an arc-shaped groove, 319 is a plane spring cushion, 320 is a through hole B, 321 is a spring limiting groove, and 322 is a through hole C.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 20, the invention comprises a puncture cannula assembly 1, a puncture rod 2 and a puncture core assembly 3, wherein both the puncture rod 2 and the puncture core assembly 3 can be inserted into the puncture cannula assembly 1, and the puncture rod 2 is inserted into the puncture cannula assembly 1 and is used for guiding the puncture cannula assembly 1 to pass through the cortex of a patient; the puncture core assembly 3 is inserted into the puncture cannula assembly 1, forms a plurality of independent channels with the puncture cannula assembly 1, and guides external medical instruments to enter a human body through the independent channels.

As shown in fig. 2, 5, 7 and 8, the puncture cannula assembly 1 of the present embodiment includes a puncture tube 101, a puncture tube holder 102, a gas injection valve 103, a connector 104, a rotating ring 105 and a clamping member 106, wherein the puncture tube 101 is a hollow circular tube, one end (proximal end) of the puncture tube 101 is fixedly connected (e.g., welded) to one end of the puncture tube holder 102, an end face of the other end (distal end) of the puncture tube 101 is an inclined surface, and a section of anti-slip portion is provided on an outer surface of the puncture tube 101; one end of the clamping piece 106 is fixed with the puncture core assembly 3, the rotating ring 105 is fixedly connected (for example, welded) with the other end of the clamping piece 106, the other end of the puncture tube seat 102 is integrally and rotatably connected with the rotating ring 105 and the clamping piece 106 after being connected, and the puncture tube seat 102 is respectively provided with the air injection valve 103 and the connecting piece 104. One side of the axial section of the rotating ring 105 in the embodiment is in an L shape, the other end of the clamping piece 106 is radially retracted inwards to form a spigot, and the vertical edge of the L shape is abutted to the spigot; the other end of the puncture tube seat 102 is provided with a flange 110 outward, and the flange 110 is accommodated between the other end of the clamping member 106 and the L-shaped transverse edge and can rotate relatively. The puncture tube seat 102 of the embodiment is respectively provided with a connecting piece positioning groove 108 and a gas injection valve mounting hole 109, the connecting piece positioning groove 108 is provided with a connecting piece 104, and the connecting piece 104 is used for being connected with a mechanical arm beside a surgical robot system bed; the gas injection valve 103 is installed at the gas injection valve installation hole 109, and the gas injection valve installation hole 109 is located below the gas check valve seat 303 and communicates with the independent passage 310. The gas injection valve 103 of the present embodiment is a conventional valve with a rotatable valve core 111 to control the opening and closing of the gas injection valve 103.

As shown in FIGS. 4 and 6, the puncture rod 2 of this embodiment has a plurality of cutting edges 201 at one end (distal end) and a flange 202 at the other end (proximal end) for grasping and pressing, and the puncture rod 2 can be inserted into the puncture cannula assembly 1 without any seam.

As shown in fig. 3 and fig. 10 to 20, the puncture core assembly 3 of the present embodiment includes a guide plate 301, a choke valve 302, a choke valve seat 303, a seal 304, a seal cover 305, and a guide seat 306, wherein the guide seat 306 is connected to one end of the seal cover 305 by a bolt, and the other end of the seal cover 305 is connected to the choke valve seat 303 by a bolt; a sealing ring groove 308 is formed in the outer surface of the choke valve seat 303, a sealing ring is arranged in the sealing ring groove 308, and the sealing ring is inserted into the puncture tube assembly 1 and then is in sealing contact with the inner wall of the clamping piece 106; the inner wall of one end of the choke valve seat 303 is provided with a clamping groove B309 for fixedly connecting the guide sheet 301, and the other end of the choke valve seat 303 is respectively provided with an inner spigot and an outer spigot; the choke valve 302 is installed in the choke valve seat 303, the choke valve 302 of the present invention is different from the choke valve of the prior art puncture outfit in that the choke valve of the prior art puncture outfit has only one passage for the external instrument to pass through, while the choke valve 302 of the present invention has a planar spring pad 319, the lower surface of the planar spring pad 319 has a plurality of (four in this embodiment) independent choke valve bodies 316, the center of the bottom plane of each choke valve body 316 is provided with a cross-shaped groove 317, each included angle of the cross-shaped groove 317 has an arc-shaped groove 318, the centers of the four arc-shaped grooves 318 are symmetrically distributed, and the planar spring pad 319 has an opening corresponding to each choke valve body 316. The choke valve 302 of this embodiment is a resilient compressible material (e.g., rubber) and the cross-shaped groove 317 closes when no external instrument is passed through. During the use process, the lubricating substance can adopt but is not limited to medical silicone oil. The flat elastic pad 319 of the choke valve 302 is positioned at the inner spigot of the choke valve seat 303, a sealing pad 304 is arranged between the choke valve 302 and the sealing cover 305, the sealing pad 304 of the embodiment is a round elastic pad, an elastic compressible material (such as rubber) is adopted, and through holes C322 with the same number as that of the choke valve bodies 316 and corresponding to the number of the through holes C322 are formed in the sealing pad 304. The gas barrier valves 302 and the gaskets 304 cooperate to form a plurality of independent sealed compartments, the number of which varies according to the requirements of the minimally invasive surgical robotic system, four in this embodiment, corresponding to the four independent channels 310 one to one. The sealing cover 305 is positioned at the external spigot of the choke valve seat 303 and pressed on the sealing gasket 304, and through holes B320 which are the same in number and correspond to the choke valve bodies 316 in a one-to-one mode are formed in the sealing cover 305. The guide seat 306 is provided with guide grooves 311 which are the same as the choke valve bodies 302 in number and correspond to each other one by one, and the bottom of each guide groove 311 is provided with a through hole A312; the guide slot 311 of the present embodiment is funnel-shaped with a wide top and a narrow bottom, so as to facilitate guiding when installing an instrument, and a through hole a312 is formed at the bottom of the guide slot 311; the side wall of the guide base 306 is provided with a lug clamping groove 313 for mounting an elastic clamping device, and the guide base 306 is connected with one end of the clamping piece 106 through the elastic clamping device. The guide piece 301 is inserted into the slot B309 on the inner wall of one end of the choke valve seat 303, and the guide piece 301 forms independent channels 310 which are the same as the number of the choke valve bodies 302 and are in one-to-one correspondence with the inner wall of the puncture tube 101 after the puncture core assembly 3 is inserted into the puncture tube assembly 1. The guide plate 301 is divided into different numbers of blades according to the number of instruments required to pass through the puncture outfit, and the end surface of the guide plate 301 of the embodiment is in a cross shape, so that four independent channels 310 are formed between the guide plate and the inner wall of the puncture tube 101.

The elastic clamping device of this embodiment is a lug 307, the sidewall of the sealing cover 305 extends outward along the radial direction to form an extending portion B314, the extending portion B314 is provided with a lug sliding slot 315, the sidewall of the sealing cover 305 and the lug 307 are both provided with a spring limiting slot 321, and the spring limiting slot 321 of this embodiment is a blind hole. One end of the tab 307 is installed in a tab locking groove 313 formed in the guide base 306 and protrudes outward, the bottom of the protruding portion abuts against the upper surface of the extending portion B314, and the other end of the tab 307 is hook-shaped. The sidewall of the clip 106 extends outward along the radial direction to form an extension a113, and the extension a113 is provided with a slot a112 for clipping the lug 307. One end of the lug 307 is mounted on the guide seat 306, and the other end of the lug passes through the lug sliding groove 315 on the sealing cover 305, and is clamped with the clamping groove A112 on the clamping piece 106 through the barb-shaped end part, so that the rapid mounting is realized; after installation, the puncture core assembly 3 can be rotated with the snap 106 and the rotating ring 105 relative to the puncture needle holder 102. A spring is arranged between the spring limiting groove 321 on the sealing cover 305 and the spring limiting groove 321 on the lug 307, and two ends of the spring are always abutted against the spring limiting groove 321 on the sealing cover 305 and the spring limiting groove 321 on the lug 307. Two lugs 307 are arranged on the guide seat 306 of the embodiment and are uniformly distributed in the circumferential direction; accordingly, the extension portion B314 of the sealing cover 305 and the extension portion a113 of the snap member 106 are both two.

The working principle of the invention is as follows:

during operation, a doctor can cut an incision at a target position (such as the abdomen) of a patient, the puncture rod 2 is inserted into the puncture sleeve assembly 1, the cutting edge 201 at the distal end of the puncture rod is aligned with the incision and pressed downwards, so that the puncture sleeve assembly 1 passes through the abdominal cortex of the patient under the guidance of the puncture rod 2, and then the puncture rod 2 is pulled out.

Inserting the puncture core assembly 3 into the puncture cannula assembly 1, pressing the lug 307 inwards when the puncture core assembly 3 and the puncture cannula assembly 1 are installed, and then enabling the other end of the lug 307 to penetrate through the clamping groove A112 on the extending part A113 on the clamping component 106; after the hand is released, the lug 307 moves outwards to reset under the elastic force of the spring, and the barb at the other end of the lug 307 clamps the clamping groove A112. The gas injection valve 103 is connected with an external gas pump to prop up the abdominal wall. After the external air pump stops pumping air, the switch of the air injection valve 103 is closed, the external medical instrument is guided by the guide seat 306 of the puncture core assembly 3, and the independent channel 310 formed by the puncture core assembly 3 and the puncture cannula assembly 1 enters the abdominal cavity.