CN113081143A

CN113081143A - Tissue clamping device

Info

Publication number: CN113081143A
Application number: CN202110568469.5A
Authority: CN
Inventors: 陈金怡; 陈宜国; 陈亮; 朱杰志; 张杨
Original assignee: Guangzhou Kehui Jianyuan Medical Technology Co ltd
Current assignee: Guangzhou Kehui Jianyuan Medical Technology Co ltd
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2021-07-09
Anticipated expiration: 2041-05-25
Also published as: CN113081143B

Abstract

The invention relates to the technical field of medical instruments, in particular to a tissue clamping device, which comprises: a fixed tube; the clamping jaw comprises two elastic clamping arms and a connecting part for connecting the two clamping arms; the two clamping arms are respectively provided with a claw, and the connecting part is arranged in the fixed pipe and can slide along the axial direction of the fixed pipe, so that the clamping arms can perform telescopic motion relative to the first end part of the fixed pipe; wherein, two centre gripping arms have: the initial state is that the fixing pipe is positioned outside the fixing pipe and is close to each other under the hooking action of the hook claws; the hook claw is positioned outside the fixed pipe, and the hook claw is released from hooking and is reset to the unfolding state of mutual expansion; and a clamping state that the clamping bodies move close to each other after being extruded by the pipe wall of the fixed pipe when sliding towards the direction of contracting in the fixed pipe.

Description

Tissue clamping device

Technical Field

The invention relates to the technical field of medical instruments, in particular to a tissue clamping device.

Background

In recent years, endoscope hemostatic clips have become the most effective and clinically applicable method for acute gastrointestinal hemorrhage non-operative treatment of critically ill patients due to the characteristics of small trauma, high hemostasis speed, low incidence rate of re-bleeding, few complications, definite curative effect and the like. The efficacy of hemostatic clips for occluding small blood vessels and hemostasis is currently well established, but in the prior art, hemostatic clips are typically deployed into a patient and require high sedation throughout the operator's procedure to prevent the deployed jaws from scratching the patient's luminal wall.

Disclosure of Invention

Technical problem to be solved

To solve the above problems, the present invention provides a tissue holding device in which jaws can be brought together into a predetermined position in a patient's body and then opened to hold tissue.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a tissue gripping device comprising: a fixed tube; the clamping jaw comprises two elastic clamping arms and a connecting part for connecting the two clamping arms; the two clamping arms are respectively provided with a claw, and the connecting part is arranged in the fixed pipe and can slide along the axial direction of the fixed pipe, so that the clamping arms can perform telescopic motion relative to the first end part of the fixed pipe; wherein, two centre gripping arms have: the initial state is that the fixing pipe is positioned outside the fixing pipe and is close to each other under the hooking action of the hook claws; the hook claw is positioned outside the fixed pipe, and the hook claw is released from hooking and is reset to the unfolding state of mutual expansion; and when sliding in the direction of contracting in the fixed tube, the clamping state that the tube wall of the fixed tube extrudes and then moves close to each other; the tissue gripping device further comprises: the traction device can release the mutual hooking state of the two hooks so as to enable the two clamping arms to be in an unfolded state; when the two clamping arms are reset to the unfolding state, the traction device can pull the clamping arms to slide in the direction of retracting in the fixed pipe, so that the two clamping arms are in the clamping state.

Preferably, the gripping arm, the connecting portion and the finger are integrally formed.

Preferably, the first end of the fixed tube is provided with a limiting piece, the limiting piece has elasticity and can be clamped with the connecting part to limit the clamping jaw to slide in the fixed tube; the traction device comprises: the guide rod is connected in the fixed pipe in a sliding way, and the first end of the guide rod penetrates through the connecting part; the abutting block is arranged at the first end of the guide rod and is arranged at one end, far away from the connecting part, of the hook claw when the two clamping arms are in the initial state; the traction steel wire is connected to the second end of the guide rod, the supporting block can be pulled by the guide rod to move towards the direction in the fixed pipe, the supporting block is made to extrude the hook claw to separate, the clamping arm is made to change from an initial state to an unfolded state, then the limiting part is extruded, the limiting part is made to separate from the connecting part, and the clamping arm can move towards the fixed pipe.

Preferably, the tissue clamping device further comprises a sheath tube, wherein a protruding buckling block is arranged in the sheath tube, a buckling hole is formed in the second end of the fixing tube, the buckling block is clamped into the buckling hole, the second end of the fixing tube can be connected with the sheath tube, and the traction steel wire can penetrate through the sheath tube and extend outwards.

Preferably, the second end of the guide rod is provided with a boss, the side wall of the boss is matched with the inner wall of the fixed pipe, and the boss slides to the buckling hole to extrude the buckling block out of the buckling hole.

Preferably, the fixed pipe is internally provided with a first lug, the clamping arm is provided with a limit groove, and when the clamping arm slides towards the fixed pipe, the first lug can be clamped into the limit groove to limit the position of the clamping jaw.

Preferably, the abutting block is provided with an engaging hole matched with the first end of the guide rod, and the first end of the guide rod is provided with an engaging boss and can be inserted into the engaging hole; the side surface of the abutting block is connected with an elastic blocking piece, the side surface of the abutting block is correspondingly provided with a socket communicated with the joint hole, and the elastic blocking piece is inserted into the socket in a bent shape and can be abutted against the bottom of the joint boss to prevent the guide rod from being separated from the abutting block.

Preferably, a second bump is further arranged in the fixed pipe, and an opening is further formed in the clamping arm below the limiting groove; when the clamping arm slides towards the fixed pipe, the second lug can pass through the opening and is abutted to the bent part of the elastic retaining sheet; the second lug extrudes the bending part of the elastic blocking piece by pulling the traction steel wire, so that the elastic blocking piece can exit from the socket, and the guide rod can be separated from the abutting block.

Preferably, the fixed pipe, the abutting block, the guide rod and the sheath pipe are all made of insulating materials, and the surfaces of the clamping jaws are covered with insulating layers.

(III) advantageous effects

The invention provides a tissue clamping device, which has the following beneficial effects: in the initial state of the tissue gripping device, the two gripping arms of the jaws are brought closer together and kept closed by the fingers. When in use, the two clamping arms are kept in an initial state, and then the tissue clamping device is stretched into the body of a patient and is moved to a position needing clamping and hemostasis; then the traction device is driven to separate two groups of hook claws which are hooked mutually, so that the two clamping arms are separated from each other under the action of the elasticity of the two clamping arms and are changed into an unfolded state; the clamping jaw is close to the tissue to be clamped, the traction device is continuously driven to drive the clamping arms to slide towards the fixed tube, and the two clamping arms are continuously close to each other under the extrusion action of the inner wall of the fixed tube and clamp the tissue in the process. Thus, the clamping jaws can clamp the tissue needing hemostasis.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention without limiting the invention in which:

FIG. 1 shows an overall structural diagram of an embodiment of the present invention;

FIG. 2 shows a second overall structural diagram of an embodiment of the present invention;

FIG. 3 is a first schematic cross-sectional view of an embodiment of the present invention;

FIG. 4 shows a second cross-sectional structural view of an embodiment of the present invention;

FIG. 5 shows a third cross-sectional structural view of an embodiment of the present invention;

FIG. 6 shows a cross-sectional structural diagram of an embodiment of the present invention;

FIG. 7 shows a schematic view of a jaw configuration in an embodiment of the invention;

FIG. 8 is a first schematic view showing the structure of the first holding block and the guide rod in the embodiment of the invention;

FIG. 9 is a second schematic structural view of a holding block and a guide rod in an embodiment of the present invention;

fig. 10 shows a schematic structural view of the fixing tube and the sheath tube in the embodiment of the present invention.

In the figure: the device comprises a clamping jaw 1, a clamping arm 11, a claw 111, a limiting groove 12, an opening 13, a through hole 14, a connecting part 15, a fixing tube 2, a limiting part 21, a clamping groove 211, a first projection 22, a second projection 23, a buckling hole 24, a resisting block 3, a first blocking piece 31, a second blocking piece 32, a connecting hole 33, a socket 34, an elastic blocking piece 35, a guide rod 4, a connecting boss 40, a boss 41, a sheath tube 5, a buckling block 51 and a traction steel wire 6.

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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-10, embodiments of the present invention provide a tissue gripping device comprising: a fixed tube 2; the clamping jaw comprises a clamping jaw 1, wherein the clamping jaw 1 comprises two elastic clamping arms 11 and a connecting part 15 for connecting the two clamping arms 11; the two clamping arms are provided with claws 111, and the connecting part 15 is arranged in the fixed pipe 2 and can slide along the axial direction of the fixed pipe so that the clamping arm 11 can perform telescopic motion relative to the first end part of the fixed pipe 2; wherein, two clamp arms 11 have: an initial state in which the fixing pipe 2 is positioned outside and is close to each other by the hooking action of the hook claw 111; positioned outside the fixed pipe 2, and released from the hook of the hook claw 111 and reset to the expanded state; and a clamping state in which the pipe walls of the fixed pipe 2 are extruded and then move close to each other when sliding in the direction of contracting the fixed pipe 2;

the tissue gripping device further comprises: a traction device which can release the mutual hooking state of the two hooks 111 so as to enable the two clamping arms 11 to be in an unfolding state; when the two clamping arms 11 are reset to the unfolded state, the traction device can pull the clamping arms 11 to slide in the direction of retracting in the fixed pipe 2, so that the two clamping arms 11 are in the clamping state.

Specifically, two sets of corresponding hooks 111 are respectively disposed on the two clamping arms 11.

According to the above solution, in the initial state of the tissue gripping device, the two gripping arms 11 of the jaw 1 are close to each other and kept closed by the fingers 111. When in use, the two clamping arms 11 are kept in an initial state, and then the tissue clamping device is inserted into the body of a patient and is moved to a position where clamping and hemostasis are needed; then, the traction device is driven to separate two groups of hook claws 111 which are hooked with each other, so that the two clamping arms 11 are separated from each other and changed into an unfolded state under the action of the elasticity of the two clamping arms; the clamping jaw 1 is close to the tissue to be clamped, the traction device is continuously driven to drive the clamping arms 11 to slide towards the fixed tube 2, and the two clamping arms 11 are continuously close to each other under the extrusion action of the inner wall of the fixed tube 2 and clamp the tissue in the process. Thus, the clamping jaw 1 can clamp the tissue needing hemostasis.

Further, the clamp arm 11, the connecting portion 15, and the finger 111 are integrally formed for convenience of production. The clamping jaw 1 is preferably a sheet metal part with certain elasticity, and the clamping arm 11, the connecting part 15 and the hook claw 111 are formed by cutting and bending the same sheet metal.

Furthermore, in order to facilitate driving the clamping jaw 1, a limiting piece 21 is arranged at the first end of the fixing tube 2, and the limiting piece 21 has elasticity and can be clamped with the connecting part 15 to limit the clamping jaw 1 to slide in the fixing tube 2;

the traction device comprises: the guide rod 4 is connected in the fixed pipe 2 in a sliding way, and the first end of the guide rod 4 penetrates through the connecting part 15; the abutting block 3 is arranged at the first end of the guide rod 4, and when the two clamping arms 11 are in the initial state, the abutting block 3 is arranged at one end, far away from the connecting part 15, of the claw 111; the traction steel wire 6 and the traction steel wire 6 are connected to the second end of the guide rod 4, the supporting block 3 can be pulled by the guide rod 4 to move towards the inside of the fixed pipe 2, the supporting block 3 is enabled to extrude the claw 111 to separate, the clamping arm 11 is enabled to change from an initial state to an unfolded state, then the limiting part 21 is extruded, the limiting part 21 is enabled to separate from the connecting part 15, and the clamping arm 11 can move towards the inside of the fixed pipe 2.

Specifically, the connecting portion 15 is provided with a through hole 14, the first end of the guide rod 4 extends out of the through hole 14 and passes through two groups of hooked claws 111, and the abutting block 3 abuts against the claws 111 when the clamping arm 11 is in an initial state. The maximum inner diameter of the through hole 14 is smaller than the maximum external dimension of the resisting block 3. The limiting part 21 is preferably an arc-shaped rubber block, the middle part of the limiting part is provided with a clamping groove 211, the limiting parts 21 are symmetrically provided with two groups of clamping grooves, and the two groups of clamping grooves are respectively arranged on two sides of the inner wall of the fixed pipe 2, so that the clamping stress of the limiting parts 21 and the connecting part 15 is more balanced. When supporting block 3 and sliding to fixed pipe 2, can extrude the arcwall face of locating part 21 one side, make it to bend to the pipe wall direction of both sides and warp to make joint groove 211 and connecting portion 15 separate, no longer restrict the slip of clamping jaw 1 in fixed pipe 2.

When the clamping arm 11 is required to be changed into an unfolding state, the traction steel wire 6 is pulled, so that the traction steel wire 6 drives the guide rod 4 and the abutting block 3 to slide towards the fixed pipe 2. In the process, the resisting block 3 is abutted against the claw 111, the claw 111 is forced to bend and then is separated, and at the moment, the clamping jaw 1 keeps a state that the two clamping arms 11 extend out of the fixed pipe 2 due to the clamping connection of the connecting part 15 and the limiting part 21; after the claw 111 is separated, the second ends of the two holding arms 11 are separated from each other by their own elastic force. The clamping jaw 1 is close to the tissue to be clamped, the traction steel wire 6 is continuously pulled, the guide rod 4 drives the abutting block 3 to slide towards the fixed tube 2, the abutting block 3 extrudes the limiting part 21, the limiting part 21 is separated from the connecting part 15, and the position of the clamping jaw 1 is not limited any more; then the supporting block 3 is abutted against the connecting part 15, the clamping jaw 1 is pulled to slide towards the fixed tube 2, and the two clamping arms 11 are continuously close to each other under the action of the inner wall of the fixed tube 2 and clamp tissues until the tissues are folded.

Further, in order to conveniently extend into the body of the patient, the tissue clamping device further comprises a sheath tube 5, a protruding buckling block 51 is arranged in the sheath tube 5, a buckling hole 21 is formed in the second end of the fixing tube 2, the buckling block 51 is clamped into the buckling hole 21, the second end of the fixing tube 2 can be connected with the sheath tube 5, and the traction steel wire 6 can extend outwards through the sheath tube 5.

Specifically, the sheath 5 is a flexible tube made of plastic, and the traction steel wire 6 can pass through the sheath 5 and extend to the outside of the patient.

Further, in order to facilitate the separation of the sheath tube 5 from the fixed tube 2, the second end of the guide rod 4 is provided with a boss 41, the side wall of the boss 41 is matched with the inner wall of the fixed tube 2, the boss 41 slides to the fastening hole 21, and the fastening block 51 can be extruded out of the fastening hole 21.

Specifically, the bosses 41 are fan-shaped, and two sets of the bosses 41, the fastening holes 21, and the fastening blocks 51 are provided in a one-to-one correspondence.

Furthermore, a first bump 22 is arranged in the fixed tube 2, a limiting groove 12 is arranged on the clamping arm 11, and when the clamping arm 11 slides into the fixed tube 2, the first bump 22 can be clamped into the limiting groove 12 to limit the position of the clamping jaw 1.

Specifically, be equipped with the inclined plane of connecting spacing groove 12 side and root end face on the clamping jaw 1, first lug 22 is close to the side chamfer setting of fixed pipe 2 first end to receive the pulling force effect that comes from to support piece 3 when clamping jaw 1, when removing towards fixed pipe 2, first lug 22 slides in spacing groove 12 along this inclined plane, restricts clamping jaw 1's position, prevents that clamping jaw 1 from removing outside fixed pipe 2. The first protrusion 22 is preferably made of rubber so that the stopper 21 can compensate for the contact distance with the jaw 1 by its own deformation when sliding along the inclined surface.

Furthermore, in order to install the resisting block 3 at the first end of the guide rod 4, the resisting block 3 is provided with an engaging hole 33 matched with the first end of the guide rod 4, and the first end of the guide rod 4 is provided with an engaging boss 40 and can be inserted into the engaging hole 33; the side surface of the abutting block 3 is connected with an elastic baffle 35, the side surface of the abutting block 3 is correspondingly provided with a socket 34 communicated with the engaging hole 33, and the elastic baffle 35 is inserted into the socket 34 in a bending shape and can abut against the bottom of the engaging boss 40 to prevent the guide rod 4 from separating from the abutting block 3.

Furthermore, in order to facilitate the separation of the abutting block 3 from the guide rod 4, a second bump 23 is further arranged in the fixed tube 2, and an opening 13 is further formed in the clamping arm 11 below the limiting groove 12; when the clamping arm 11 slides into the fixed tube 2, the second lug 23 can pass through the opening 13 and is abutted to the bending part of the elastic baffle 35; by pulling the pull wire 6, the second protrusion 23 presses the bending portion of the elastic block 35, so that the elastic block 35 exits the socket 34, and the guide rod 4 can be separated from the abutting block 3.

Specifically, two sets of the insertion openings 34 and the elastic blocking pieces 35 are arranged in a one-to-one correspondence manner and are respectively located on two oppositely arranged side surfaces of the abutting block 3. The abutting block 3 is formed by bonding a first blocking piece 31 and a second blocking piece 32, the engaging hole 33 penetrates through the first blocking piece 31 and the second blocking piece 32, and the socket 34 is formed by attaching a groove on the second blocking piece 32 to the first blocking piece 31. The elastic stopper 35 is integrally provided with the first stopper 31, and is preferably made of rubber.

Furthermore, the fixing tube 2, the abutting block 3, the guide rod 4 and the sheath tube 5 are all made of insulating materials, and the surface of the clamping jaw 1 is covered with an insulating layer.

Specifically, if the periphery still has a small amount of hemorrhage after the wound is closed to the hemostatic clamp, and because close to a previous metal clamp, when unable to use new hemostatic clamp again, generally can take the mode of high frequency electrotome electricity congeals to stanch, but the electrotome can't avoid contacting a previous hemostatic clamp, if the hemostatic clamp is electrically conductive this moment, will lead to the electrical damage, sometimes even cause the damage of penetrating the wall. The tissue gripping device is designed to be entirely non-conductive.

The specific working process of the tissue clamping device is as follows:

firstly, during installation, a connecting part 15 of a clamping jaw 1 is plugged into a first end of a fixed pipe 2, and a guide rod 4 penetrates through a through hole 14 in the middle of the clamping jaw 1; the two clamping arms 11 of the clamping jaw 1 are close to each other, the clamping jaw 1 is kept closed through the hook claws 111, the first end of the guide rod 4 is ensured to extend out from between the two groups of hook claws 111, and the first end part of the guide rod 4 is provided with the abutting block 3.

Secondly, the tissue clamping device is stretched into a part to be clamped in a patient body through a sheath tube 5, then a traction steel wire 6 is pulled, a guide rod 4 is driven to drive a resisting block 3 to slide towards a fixed tube 2, and after the resisting block 3 contacts with the hook claws 111, two groups of hook claws 111 are separated; in the process, the clamping jaw 1 keeps the state that the two clamping arms 11 extend out of the fixed pipe 2 because the connecting part 15 is clamped with the limiting part 21; preventing the gripping arms 11 from sliding inside the fixed tube 2 without having fully opened; the second ends of the two clamping arms 11 which are not supported by the claw 111 are far away from each other under the self-elastic action, and the clamping jaw 1 restores the unfolding state.

And thirdly, further pressing the clamping jaw 1 close to the tissue to be clamped, pulling the traction steel wire 6 to enable the abutting block 3 to abut against the connecting part 15, driving the clamping jaw 1 to slide towards the fixed tube 2, and enabling the two clamping arms 11 of the clamping jaw 1 to be limited by the inner wall of the fixed tube 2 and to be close to each other so as to clamp the tissue to be hemostatic.

Fourthly, the guide rod 4 continues to drive the abutting block 3 to slide until the second bump 23 in the fixed tube 2 is clamped into the opening 13 at the tail part of the clamping jaw 1 and abuts against the bending part of the elastic blocking piece 35 on the abutting block 3, and at the moment, the first bump 22 is clamped into the limiting groove 12 on the clamping jaw 1 so as to fix the position of the clamping jaw 1 in the fixed tube 2, keep the clamping jaw in a furled state and clamp tissues needing hemostasis.

Fifthly, the guide rod 4 continues to move towards the second end of the fixed pipe 2 under the action of the traction steel wire 6, the elastic blocking piece 35 on the abutting block 3 is forced by the second bump 23 to exit the socket 34, and the guide rod 4 can slide out of the engaging hole 33, so that the abutting block 3 is separated from the first end of the guide rod 4.

Sixthly, after the guide rod 4 is separated from the abutting block 3, the boss 41 at the second end of the guide rod moves to the buckling hole 24 of the fixed tube 2 to push out the buckling block 51 of the sheath tube 5, so that the sheath tube 5 is separated from the fixed tube 2. Finally, the jaw 1 and the fixed tube 2 are left in the patient and the guide rod 4 is pulled out of the patient following the traction wire 6 and the sheath 5.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A tissue gripping device, comprising:

a fixed tube (2);

the clamping jaw (1) comprises two elastic clamping arms (11) and a connecting part (15) for connecting the two clamping arms (11); the two clamping arms are respectively provided with a claw (111), and the connecting part (15) is arranged in the fixed pipe (2) and can slide along the axial direction of the fixed pipe so that the clamping arms (11) can perform telescopic movement relative to the first end part of the fixed pipe (2);

wherein the two gripping arms (11) have:

an initial state that the fixing pipe (2) is positioned outside and is close to each other under the hooking action of the hook claw (111);

is positioned outside the fixed pipe (2), releases the hook of the hook claw (111) and resets to the unfolding state of mutual expansion;

and when sliding in the direction of contracting in the fixed pipe (2), the clamping state that the pipe walls of the fixed pipe (2) are extruded and then move close to each other;

the tissue gripping device further comprises:

a traction device which can release the mutual hooking state of the two hooks (111) so as to enable the two clamping arms (11) to be in an unfolding state; when the two clamping arms (11) are reset to the unfolded state, the traction device can pull the clamping arms (11) to slide towards the direction of contracting in the fixed pipe (2), so that the two clamping arms (11) are in a clamping state.

2. A tissue gripping device according to claim 1, characterised in that the gripping arm (11), the connecting portion (15) and the finger (111) are integrally formed.

3. A tissue holding device according to claim 1, wherein the first end of the fixed tube (2) is provided with a stopper (21), the stopper (21) is elastic and can be engaged with the connecting portion (15) to limit the sliding of the clamping jaw (1) in the fixed tube (2);

the traction device comprises:

the guide rod (4) is connected in the fixed pipe (2) in a sliding mode, and the first end of the guide rod (4) penetrates through the connecting part (15);

the abutting block (3) is arranged at the first end of the guide rod (4), and when the two clamping arms (11) are in the initial state, the abutting block (3) is arranged at one end, far away from the connecting part (15), of the hook claw (111);

the traction steel wire (6) is connected to the second end of the guide rod (4), the supporting block (3) can be pulled by the guide rod (4) to move towards the inner direction of the fixed pipe (2), the supporting block (3) can extrude the claw (111) to separate the claw, so that the clamping arm (11) is changed from an initial state to an unfolded state, then the limiting piece (21) is extruded, the limiting piece (21) is separated from the connecting part (15), and the clamping arm (11) can move towards the inner direction of the fixed pipe (2).

4. The tissue clamping device according to claim 1, further comprising a sheath (5), wherein a protruding fastening block (51) is disposed in the sheath (5), a fastening hole (21) is disposed at the second end of the fixing tube (2), the fastening block (51) is snapped into the fastening hole (21), so that the second end of the fixing tube (2) is connected to the sheath (5), and the traction wire (6) can extend outward through the sheath (5).

5. The tissue clamping device according to claim 4, wherein the second end of the guide rod (4) is provided with a boss (41), the side wall of the boss (41) is matched with the inner wall of the fixed tube (2), and the boss (41) slides to the buckling hole (21) to extrude the buckling block (51) out of the buckling hole (21).

6. A tissue holding device according to claim 1, wherein a first protrusion (22) is provided in the fixing tube (2), a limiting groove (12) is provided on the holding arm (11), and when the holding arm (11) slides into the fixing tube (2), the first protrusion (22) can be clamped into the limiting groove (12) to limit the position of the clamping jaw (1).

7. A tissue holding device according to claim 3, wherein said abutment block (3) is provided with an engagement hole (33) for engaging with a first end of said guide rod (4), said first end of said guide rod (4) being provided with an engagement projection (40) and being insertable into said engagement hole (33); the side surface of the abutting block (3) is connected with an elastic blocking piece (35), the side surface of the abutting block (3) is correspondingly provided with a socket (34) communicated with the connecting hole (33), and the elastic blocking piece (35) is inserted into the socket (34) in a bent shape and can be abutted against the bottom of the connecting boss (40) to prevent the guide rod (4) from being separated from the abutting block (3).

8. A tissue holding device according to claim 7, wherein a second cam (23) is further provided in the fixation tube (2), and the holding arm (11) is further provided with an opening (13) below the limiting groove (12); when the clamping arm (11) slides into the fixed pipe (2), the second lug (23) can penetrate through the opening (13) and is abutted to the bent part of the elastic blocking piece (35);

the second bump (23) extrudes the bending part of the elastic blocking piece (35) by pulling the traction steel wire (6), so that the elastic blocking piece (35) can exit from the socket (34), and the guide rod (4) can be separated from the abutting block (3).

9. A tissue holding device according to any one of claims 3 or 4, wherein said holding tube (2), said abutment (3), said guide rod (4) and said sheath (5) are made of insulating material, and said surface of said holding jaw (1) is covered with an insulating layer.