CN210811306U - Tissue clamping device - Google Patents

Abstract

The present application provides a tissue clamping device comprising: an operating assembly and a chuck assembly. In practical application, the operating wire in the operating assembly can drive the elastic release part to move, so that the clamp in the chuck assembly can slide in the sleeve, and the clamp can be opened and closed for many times under the action of the elasticity of the clamp and the wall of the sleeve. Through the restraint and the releasing restraint of the inner wall of the sleeve on the elastic release piece, the separable connection of the groove in the middle of the clip and the far-end connecting part of the elastic release piece is realized. The tissue clamping device is simple in structure, stable in connection, easy to manufacture in batches and stable, and production process cost and quality control cost are greatly reduced.

Description

Tissue clamping device

Technical Field

The application relates to the technical field of endoscope medical equipment, in particular to a tissue clamping device.

Background

The tissue clamping device is a minimally invasive surgical instrument and is commonly used for hemostasis of wounds in a patient body, such as digestive tract hemostasis and the like. The tissue clamping device can be delivered to the operation position in the body of a patient through an endoscope channel, and clamping operation is carried out in vitro, so that hemostasis treatment is completed. Generally, after hemostatic treatment with a tissue clamping device, granuloma is formed in local tissue inflammation process, and the granuloma falls off automatically and is discharged out of the body through the digestive tract. The operation has the advantages of small injury, high hemostasis speed, low incidence rate of re-bleeding, few complications, definite curative effect and the like.

A typical tissue clamping device includes a jaw member, an introduction member, and an operation member. In practical application, the jaw component and the introduction component can be sent into the alimentary canal of a patient through an endoscope channel, so that the jaw component reaches a preset operation position in the body of the patient, an operation action is implemented through the operation component, the implemented operation action is transmitted to the jaw component through the introduction component, the jaw component generates action response, and hemostasis or clamping operation is performed on an operation wound. Then the jaw part is separated from the leading-in part through the operating part, so that the jaw part remained in the body of the patient clamps the blood vessel and the surrounding tissues, and the aim of hemostasis and clamping is achieved. Typically the jaw members are metal hemostats or the like.

To achieve separation between the jaw members and the introduction member, the tissue fastening device is generally provided with a deformable structure at a proximal (tail) end of the metal hemostatic clip to facilitate separation between the jaw members and the introduction member by a force transmitted through the introduction member. However, the deformable structure causes unstable connection between the jaw member and the introduction member, and the tissue clamping device may be opened and closed only once. The working environment of the endoscope limits the accurate operation of an operator, so that the clamping components cannot be clamped at one time. Therefore, the conventional tissue fastening device has a low success rate in the operation. In addition, the conventional tissue clamping device has a rotation function in addition to the clamping function. Due to the added functions of the instrument, the structure of the instrument is relatively complex, the manufacturing cost and the quality control cost of the instrument are increased greatly, and the use stability of the instrument is low.

SUMMERY OF THE UTILITY MODEL

The application provides a tissue clamping device, the self elastic characteristic of make full use of material to required basic functions such as clamping, locking are realized to extremely simple structure, have also realized important functions such as many times switching and rotation simultaneously, and it is complicated to solve traditional tissue clamping device structure, and part quantity is many, is unfavorable for processing preparation and quality control's problem.

The present application provides a tissue clamping device comprising: an operating assembly and a chuck assembly detachably connected with the operating assembly; wherein the collet assembly comprises a collet and a sleeve; the clamp is provided with two sheet-shaped clamping arms which are of an integrated structure, and the clamp is arranged in the sleeve and close to the far end; the operating component comprises an elastic release piece and a separation outer cylinder; the elastic release piece is detachably connected with the middle parts of the two clamping arms of the clamp so as to enable the clamp to be opened and closed for multiple times, the separation outer cylinder is arranged at the near end of the sleeve, and the separation outer cylinder is detachably connected with the sleeve;

the middle parts of the two clamping arms of the clamp are provided with clamping parts, and the far end of the elastic release piece is provided with a connecting part matched with the clamping parts; the connecting arm of the elastic release piece is shaped into an outward-expanding bending structure, so that the connecting arm of the elastic release piece can be compressed by the inner wall of the sleeve to generate elastic deformation; the connecting portion can enter the clamping portion, so that the connecting arm of the elastic releasing piece is separated from the inner wall of the sleeve, and the connecting portion is separated from the clamping portion.

Optionally, the clamping portion is a groove; the connecting portion are connecting grooves, the clamping portion and the connecting portion are matched through buckling of the grooves and the connecting grooves.

Optionally, the grooves are arranged on the two side edges of the middle parts of the two clamping arms of the clamp; the elastic release piece comprises two connecting arms with the same shape, and the far end of each connecting arm is provided with the connecting part.

Optionally, a limit groove is arranged on the distal end face of the sleeve; the clamping arm of the clamp is provided with a guide sheet; the guide piece can enter the limiting groove and contact the bottom of the limiting groove.

Optionally, the operating assembly further comprises an elastic connecting piece, the sleeve is provided with a connecting hole, and the inner wall of the separating outer cylinder is provided with a clamping groove; the elastic connecting piece penetrates through the connecting hole and is arranged in the clamping groove, so that the separating outer cylinder can be detachably connected with the sleeve.

Optionally, the elastic connecting piece is a flexible elastic piece.

Optionally, a guide groove is formed in the sleeve, an elastic protruding portion which is placed into the guide groove is formed in the clamping arm of the clamp, and the elastic protruding portion can slide in the guide groove so that the clamping piece can be switched between an opening state and a closing state.

Optionally, a twisted tip is arranged on the sleeve; the twisted tip is a sheet-shaped structure which is obliquely arranged on the circumferential surface of the sleeve; the twisted tip can enter the clamping groove on the inner wall of the separating outer cylinder so as to realize that the separating outer cylinder is separably connected with the sleeve.

Optionally, the sleeve is provided with a connecting hole collinear with the guide groove, and the elastic protruding portion on the clamp arm of the clamp comprises a plurality of hanging platforms; and the hanging table close to the proximal end of the clamp can enter the connecting hole from the guide groove so as to realize the locking of the clamp in the sleeve.

Optionally, the tissue clamping device further comprises: a catheter, an operating wire and a handle;

the proximal end of the separation outer cylinder is connected with the handle through the catheter; the operation wire is arranged in the catheter and can move in the catheter; the far end of the operating wire is connected with the elastic release piece, and the near end of the operating wire is connected with the sliding part on the handle so as to control the clamp to complete opening and closing actions.

According to the above technical solution, the present application provides a tissue clamping device, including: an operating assembly and a chuck assembly. In practical application, the operating wire in the operating assembly can drive the elastic release part to move, so that the clamp in the chuck assembly can slide in the sleeve, and the clamp can be opened and closed for many times under the action of the elasticity of the clamp and the wall of the sleeve. Through the restraint of the inner wall of the sleeve to the elastic release member and the release restraint, the separable connection of the clamping portion in the middle of the clamp and the far-end connecting portion of the elastic release member is realized. The tissue clamping device is simple in structure, stable in connection, easy to manufacture in batches and stable, and production process cost and quality control cost are greatly reduced.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a tissue fastening device according to the present application;

FIG. 2 is a schematic cross-sectional view of a tissue fastening device according to the present application;

FIG. 3 is a schematic view of a clip according to the present application;

FIG. 4 is a schematic view of a resilient release member according to the present application;

FIG. 5 is a schematic view of a sleeve according to the present application;

FIG. 6 is a schematic structural diagram of a separation outer cylinder according to the present application;

FIG. 7 is a schematic view of a connecting piece according to the present application;

FIG. 8 is a schematic diagram of a tissue fastening device according to the present application at a detachment stage;

FIG. 9 is a schematic view of another sleeve of the present application;

FIG. 10 is a schematic view of another clip of the present application;

FIG. 11 is a schematic view of another alternative resilient release member of the present application;

FIG. 12 is a schematic structural diagram of a clamping portion according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a connecting portion in an embodiment of the present application.

Detailed Description

Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely as exemplifications of systems and methods consistent with certain aspects of the application, as recited in the claims.

In the technical scheme provided by the application, for convenience of description, one end of the whole device, which is placed in a human body, is called a distal end, and the end is mainly used for performing operation actions on tissues; the end located outside the body is called the proximal end, and this end is mainly used for the operation of the operator. Unless otherwise stated, the term distal end of each member refers to the end near the inside of the body, and the term proximal end of each member refers to the end near the outside of the body.

Referring to fig. 1, a schematic structural diagram of a tissue fastening device according to the present application is shown. Fig. 2 is a schematic cross-sectional view of a tissue fastening device according to the present invention. As can be seen from fig. 1 and 2, the present application provides a tissue clamping device comprising: an operating assembly 1 and a chuck assembly 2 detachably connected to each other. The cartridge assembly 2 includes a clip 21 and a sleeve 22. In practical application, the clip 21 is disposed at a distal position of the sleeve 22, and can slide in the sleeve 22 to form a clipping space for clipping the wound of the patient, that is, the clip 21 is disposed inside the sleeve 22 at a position close to the distal position.

In order to realize clamping action and repeated opening and closing; the clip 21 is provided with two sheet-shaped clip arms of an integral structure. As shown in fig. 3, the clip 21 may be forged or stamped from a leaf-like configuration of spring blades. When no force is applied, the two clamping arms of the clamp 21 keep a certain opening angle with each other, i.e. the two clamping arms are in a V-shaped structure. In practical application, the inner wall of the sleeve 22 can apply an acting force to the back surfaces of the clamping arms of the clamp 21, so that the angle between the two clamping arms which are mutually opened is reduced in the process that the clamp 21 is moved towards the proximal direction, that is, the two clamping arms are mutually closed. After the two arms are fully closed, the entire clip 21 assumes a folded state. When the clamp 21 moves towards the far end direction, the action position of the inner wall of the sleeve 22 on the clamping arm changes, namely the force arm is changed, and the clamp 21 can expand the opening and closing angle again under the action of the elasticity of the clamp 21.

Therefore, in the technical scheme provided by the application, the clamp 21 is moved towards the proximal direction, and the two clamping arms can be closed through the limiting effect of the sleeve 22; by moving the clip 21 in the distal direction, the two arms of the clip 21 can be restored to the open state by the elastic action of the material itself. In addition, in order to make the operation more flexible, the clip 21 should be made of a material with better elasticity, and the thickness of the connecting position of the two clamping arms of the clip 21 should not be too large, so as to reduce the requirement of driving force on the premise of ensuring the elastic action.

In practical application, as shown in fig. 3 and 5, since the sleeve 22 is generally a circular tube structure, and the back surface of the clamping arm of the clamp 21 is arc-shaped, and in order to ensure that the clamp 21 can be opened by a preset angle, the clamping arm of the clamp 21 is small, so that the contact area between the sleeve 22 and the clamp 21 is small, which may cause unstable motion during repeated opening and closing, and may cause rotational deviation, and due to the defect of rotational deviation, the clamping effect of the clamp 21 on the tissue may be affected. Therefore, in order to keep the clip 21 stable during opening and closing, the sleeve 22 is provided with a guide groove 222, and the clip arm of the clip 21 is provided with an elastic projection 211 which is placed in the guide groove 222, and the elastic projection 211 can slide in the guide groove 222. In practical applications, the sliding of the elastic protrusion 211 in the guide slot 222 can prevent the rotation deviation of the clip 21 during opening and closing, thereby improving the stability. Meanwhile, when the clip 21 is repeatedly opened and closed, the elastic protrusion 211 is always located in the guide groove 222, which is beneficial to smooth opening and closing of the clip 21, thereby realizing repeated opening and closing.

In some embodiments of the present application, as shown in fig. 3 and 5, the distal end surface of the sleeve 22 is provided with a limiting groove 223; a guide piece 212 is arranged on the clamping arm of the clamp 21; the guide piece 212 may enter the stopper groove 223 and contact the bottom of the stopper groove 223. The clip 21 can be further maintained to move smoothly by the stopper groove 223. In addition, the closing direction between the two clamping arms of the clamp 21 can be effectively limited through the matching between the limiting groove 223 and the guide piece 212, so that the clamping force of the clamp 21 is indirectly increased.

In operation, after the clip 21 clamps the tissue, the clip 21 and sleeve 22 need to remain in the patient to continue to clamp the tissue to promote tissue healing. To achieve that the clip 21 and sleeve 22 can be left in the patient, the present application requires that the manipulator assembly 1 and the cartridge assembly 2 be separated after the clip 21 has clamped the tissue. Namely, the operating assembly 1 comprises an elastic release piece 11 and a separation outer cylinder 13; the elastic releasing piece 11 is detachably connected with the middle parts of the two clamping arms of the clamp 21 so as to control the clamp 21 to complete multiple opening and closing, the separating outer cylinder 13 is arranged at the near end of the sleeve 22, and the separating outer cylinder 13 is detachably connected with the sleeve 22. It can be seen that in practical applications, the separation between the operating assembly 1 and the collet assembly 2 can be achieved by the separation between the clip 21 and the resilient release member 11 and the separation between the sleeve 22 and the separation outer cylinder 13.

The specific separation mode can be as follows: as shown in fig. 3, the middle parts of the two clamping arms of the clip 21 are provided with a clamping portion 214, and the distal end of the elastic releasing piece 11 is provided with a connecting portion 14 matched with the clamping portion 214; the connecting arm of the elastic releasing piece 11 is shaped into a bending structure, so that the connecting arm of the elastic releasing piece 11 can be compressed by the inner wall of the sleeve 22 to generate elastic deformation; the connecting portion 14 can enter the clamping portion 214, so that the connecting portion 14 can be separated from the clamping portion 214 when the connecting arm of the elastic releasing piece 11 leaves the inner wall of the sleeve 22.

In practical application, the clamp 21 may comprise two working phases, namely a repeated opening and closing phase and a separation phase; the elastic releasing piece 11 and the clamp 21 are continuously connected in the repeated opening and closing stage, and the clamp 21 is driven to move by the elastic releasing piece 11. In the separation stage, after it is determined that the clip 21 has clamped the tissue, the elastic releasing member 11 continuously pulls the clip 21 to move towards the distal end, so that the elastic protrusion 211 slides out of the guiding groove 222, and then slides out for a certain distance, so that the distal end of the elastic releasing member 11 is separated from the inner wall of the sleeve 22, and the elastic releasing member 11 will recover the shape, so that the connecting portion 14 is separated from the clamping portion 214, that is, the separation between the clip 21 and the elastic releasing member 11 is realized, as shown in fig. 8.

In some embodiments of the present application, the clamping portion 214 is a groove; the connecting portion 14 is a connecting groove, and the fastening portion 214 is engaged with the connecting portion 14 by fastening the groove and the connecting groove. Through the mutual lock between spread groove and the recess, can guarantee under the prerequisite of mutual separation, can obtain more stable connection.

It should be noted that, in the technical solution provided in the present application, the mutual matching relationship between the clamping portion 214 and the connecting portion 14 can be realized in various forms, for example, a mode of buckling two groove-shaped structures can be adopted, and the mutual matching relationship can also be realized by matching a notch and a fixture block. In another embodiment of the present application, as shown in fig. 12 and 13, the clamping portion 214 may be a protrusion protruding from the side of the clip, and the connecting portion 14 may be a hole structure disposed at the distal end of the elastic releasing member 11. Under the extrusion of the sleeve, the protrusion of the clamping portion 214 can enter the hole of the connecting portion 14, and after the protrusion is separated from the extrusion, the two connecting arms of the elastic releasing piece 11 recover to an outward-opened structure by virtue of elasticity, so that the connecting portion 14 and the clamping portion 214 are separated from each other.

In other embodiments of the present application, the fastening portion 214 may be provided with a hole structure, and the connecting portion 14 may be provided with a protrusion structure, and the detachable connection forms that can be imagined by those skilled in the art according to the above embodiments are all within the scope of the present application.

Further, as shown in fig. 4, the two side edges of the middle part of the two clamping arms of the clamp 21 are provided with the grooves; the elastic releasing piece 11 comprises two connecting arms with the same shape, and the distal end of each connecting arm is provided with the connecting part 14. In practical application, both the elastic releasing piece 11 and the clip 21 can be of a symmetrical structure, and on one hand, the symmetrical structure can ensure that the elastic releasing piece 11 and the clip 21 can keep a stable connection state when the opening and closing stages are repeated so as to transmit sliding moment; on the other hand, it is convenient to maintain the spring balance so as to be separated from the groove after being bound away from the inner wall of the sleeve 22. In addition, as shown in fig. 11, in order to allow the elastic releasing member 11 to be pressed by the inner wall of the sleeve 22 when the elastic releasing member 11 is in the sleeve 22, the distal end of the elastic releasing member 11 may be bent outward so as to contact the inner wall of the sleeve 22.

In order to realize the separation between the sleeve 22 and the separation outer cylinder 13, in an embodiment of the present application, as shown in fig. 6 and 7, the operation assembly 1 further includes an elastic connecting member 12, the sleeve 22 is provided with a connecting hole 221, and the inner wall of the separation outer cylinder 13 is provided with a clamping groove 131; the elastic connecting piece 12 is arranged in the clamping groove 131 through the connecting hole 221 so as to realize that the separation outer cylinder 13 is detachably connected with the sleeve 22. Furthermore, the elastic connecting piece 12 is a flexible elastic piece, the width of the middle part of the elastic connecting piece 12 can be smaller than the width of the two ends, and a movable space can be provided for the two connecting arms of the elastic releasing piece 11.

In practical application, in the repeated opening and closing stage, as shown in fig. 1, the elastic connecting member 12 is not compressed and is in a flat state, and both ends of the elastic connecting member 12 pass through the connecting holes 221 and enter the slots 131 in the inner wall of the separating outer cylinder 13, at this time, the sleeve 22 and the separating outer cylinder 13 are connected with each other by the restriction of the elastic connecting member 12. In addition, the elastic connecting piece 12 can rotate along the circumferential direction in the clamping groove 131, so that the sleeve 22 and the separation outer cylinder 13 can rotate relatively, and the rotation angle of the clamp 21 can be adjusted conveniently.

When the clip 21 completes the closure into the disengagement stage, as shown in fig. 2, the resilient connecting member 12 is pressed by the middle of the clip 21 as the clip 21 moves proximally, so that the edge thereof is disengaged from the catch 131. At this time, the separation between the outer separation cylinder 13 and the sleeve 22 is not limited by the elastic connection member 12, and the separation between the outer separation cylinder 13 and the sleeve 22 can be achieved.

In another embodiment of the present application, as shown in fig. 10, the sleeve 22 is provided with a twisted tip 224; the twisted tip 224 is a sheet-like structure obliquely disposed on the circumferential surface of the sleeve 22; as shown in fig. 9, the twisted tip 224 can enter into the slot 131 on the inner wall of the outer separating cylinder 13 to realize the detachable connection of the outer separating cylinder 13 to the sleeve 22. In practice, the twisted nib 224 is inclined at a greater angle relative to the circumferential surface of the sleeve 22 at the point of repeated opening and closing such that the outer edge thereof enters the catch 131 to join the outer barrel 13 and the sleeve 22 together. In the separation stage, the back of the clamping arm of the clamp 21 touches the inner edge of the twisting tip 224 to elastically twist relative to the circumferential wall of the sleeve 22, and at this time, the outer edge of the twisting tip 224 is separated from the clamping groove 131, so that the sleeve 22 is separated from the separation outer cylinder 13.

Further, as shown in fig. 9, the sleeve 22 is provided with a connecting hole 221 which is collinear with the guide slot 222, and the elastic projection 211 on the clamping arm of the clamp 21 comprises a plurality of hanging platforms 213; the hanging table 213 near the proximal end of the clip 21 can enter the connecting hole 221 from the guide groove 222. When the clip 21 enters the separated state, the hanging table 213 can fix the sleeve 22 and the clip 21 together by the cooperation between the hanging table 213 at the proximal end and the connecting hole 221, thereby achieving the purpose of locking the closed state of the clip 21.

In practical applications, as shown in fig. 1, in order to perform a surgical operation in vitro, the tissue clipping device further comprises: a catheter 3, an operating wire 4 and a handle 5; specifically, the proximal end of the separation outer cylinder 13 is connected with the handle 5 through the catheter 3; the operation wire 4 is arranged in the catheter 3 and can move in the catheter 3; the far end of the operating wire 4 is connected with the elastic release part 11, and the near end of the operating wire 4 is connected with the sliding part on the handle 5 so as to control the clamp 21 to complete the opening and closing actions.

Taking the clamping stomach wound as an example, performing conventional ESD operation treatment by using an endoscope, and preparing the clamping wound for ending after the treatment is finished; a fully assembled tissue closure device is removed and the sliding member on handle 5 is pulled slightly to move the operating wire 4 and thus the resilient release member 11, which causes the clip 21 to move in the guide slot 222 of the sleeve 22. Then, after the clamp 21 is in a closed state in the range of the guide groove 222, the device is penetrated into an endoscope channel and is sent to a wound surface, and a sliding part is pushed to open two clamping arms of the clamp 21 to prepare for closing the wound surface; after clamping the tissue, the sliding member is pulled to close the clamp 21, clamping the tissue, and the handle 5 is rotated as necessary to find the most suitable clamping position. After the clip 21 is closed, the sleeve 22 and the outer separation cylinder 13 are separated from each other and the clip 21 and the elastic releasing member 11 are separated from each other by continuing to apply a larger pulling force, and finally the clip assembly 2 is released. Finally, the operation assembly 1 is taken out from the clamping channel; according to different requirements of the wound surface size, the device can be conveyed continuously according to the steps until the wound surface is completely closed.

According to the technical scheme, the tissue clamping and closing device is simple in structure and simple in manufacturing process: only two to three parts locked together are finally left in the body of the patient, including the clip 21, the sleeve 22 or the clip 21, the sleeve 22 and the elastic connecting piece 12, so that the number of parts left in the body is greatly reduced. The clamp 21, the sleeve 22 and the elastic connecting piece 12 can be completed by adopting punch forming and laser engraving processing and matching with light string treatment so as to facilitate batch manufacturing and quality control; the whole performance of the device is stable, the device has the main clinical functions of multiple opening and closing, continuous rotation and the like, and the clinical problems of bleeding, wound closure and the like are solved to the greatest extent.

The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.

Claims (10)

1. A tissue fastening device, comprising:

an operating assembly (1);

a chuck assembly (2) detachably connected to the operating assembly (1);

wherein the cartridge assembly (2) comprises a clip (21) and a sleeve (22); the clamp (21) is provided with two sheet-shaped clamping arms which are of an integrated structure, and the clamp (21) is arranged in the sleeve (22) and close to the far end; the operating assembly (1) comprises an elastic release piece (11) and a separation outer cylinder (13); the elastic release piece (11) is detachably connected with the middle parts of two clamping arms of the clamp (21) so as to enable the clamp (21) to be opened and closed for multiple times, the separation outer cylinder (13) is arranged at the near end of the sleeve (22), and the separation outer cylinder (13) is detachably connected with the sleeve (22);

clamping parts (214) are arranged in the middle of the two clamping arms of the clamp (21), and a connecting part (14) matched with the clamping parts (214) is arranged at the far end of the elastic release piece (11); the connecting arm of the elastic release piece (11) is shaped into an outward-expanding bending structure, so that the connecting arm of the elastic release piece (11) can be compressed by the inner wall of the sleeve (22) to generate elastic deformation; the connecting part (14) can enter the clamping part (214) so as to enable the connecting part (14) to be separated from the clamping part (214) when the connecting arm of the elastic release piece (11) leaves the inner wall of the sleeve (22).

2. The tissue fastening device of claim 1, wherein the snap-in portion (214) is a groove; connecting portion (14) are the connecting groove, joint portion (214) with realize cooperating through the lock of recess with the connecting groove between connecting portion (14).

3. The tissue clamping device according to claim 2, wherein the middle two side edges of the two clamping arms of the clamp (21) are provided with the grooves; the elastic release piece (11) comprises two connecting arms with the same shape, and the far end of each connecting arm is provided with the connecting part (14).

4. The tissue clamping device according to claim 1, wherein a limiting groove (223) is provided on the distal end face of the sleeve (22); a guide sheet (212) is arranged on the clamping arm of the clamp (21); the guide piece (212) can enter the limiting groove (223) and contact the bottom of the limiting groove (223).

5. The tissue clamping device according to claim 1, wherein the operation assembly (1) further comprises an elastic connecting piece (12), the sleeve (22) is provided with a connecting hole (221), and the inner wall of the separation outer cylinder (13) is provided with a clamping groove (131); the elastic connecting piece (12) penetrates through the connecting hole (221) and is arranged in the clamping groove (131) so as to realize that the separating outer cylinder (13) can be detachably connected with the sleeve (22).

6. The tissue clamping device according to claim 5, wherein said elastic connecting element (12) is a flexible spring.

7. The tissue clamping device according to claim 1, wherein the sleeve (22) is provided with a guide slot (222), and the clamping arms of the clamp (21) are provided with a resilient projection (211) which is inserted into the guide slot (222), the resilient projection (211) being slidable in the guide slot (222).

8. The tissue clamping device of claim 7 wherein said sleeve (22) is provided with a twisted tip (224); the twisted tip (224) is a sheet-like structure obliquely arranged on the circumferential surface of the sleeve (22); the twisted tip (224) can enter a clamping groove (131) on the inner wall of the separating outer cylinder (13) to realize that the separating outer cylinder (13) is detachably connected with the sleeve (22).

9. The tissue clamping device according to claim 8, wherein the sleeve (22) is provided with a connecting hole (221) which is collinear with the guide slot (222), and the elastic projection (211) on the clamping arm of the clamp (21) comprises a plurality of hanging platforms (213); the hanging table (213) near the proximal end of the clip (21) can enter the connecting hole (221) from the guide groove (222).

10. The tissue fastening device of claim 1, further comprising: a catheter (3), an operating wire (4) and a handle (5);

the proximal end of the separation outer cylinder (13) is connected with the handle (5) through the catheter (3); the operating wire (4) is arranged in the catheter (3) and can move in the catheter (3); the far end of the operating wire (4) is connected with the elastic release piece (11), and the near end of the operating wire (4) is connected with a sliding part on the handle (5) so as to control the clamp (21) to finish opening and closing actions.

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