CN211674414U

CN211674414U - Hemostatic clamp and auxiliary system

Info

Publication number: CN211674414U
Application number: CN201921999228.0U
Authority: CN
Inventors: 汪振; 江路; 王昌盛; 李鹏辉; 包世勇; 宦倩
Original assignee: Shanghai Microport Medical Group Co Ltd; Microport Urocare Jiaxing Co Ltd
Current assignee: Shi Yihai; Microport Urocare Jiaxing Co Ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-10-16
Anticipated expiration: 2029-11-18

Abstract

The utility model aims to provide a hemostatic clamp and an auxiliary system, which comprises a first clamping piece, a second clamping piece, a tightening pipe, a middle clamping piece, a middle shaft component, a traction component, a control handle and at least two separators, wherein the traction component is respectively connected with the control handle and the middle shaft component, the middle shaft component is connected with the tightening pipe, the near ends of the first clamping piece and the second clamping piece are connected with the traction component, the near end of the middle clamping piece passes through the tightening pipe and is fixedly connected with the middle shaft component, the first clamping piece and the second clamping piece are arranged at two sides of the middle clamping piece, the first clamping piece and the middle clamping piece form a first clamp, the second clamping piece and the middle clamping piece form a second clamp, the control handle is used for opening or closing the first clamp and the second clamp corresponding to the first clamping piece and/or the second clamping piece, the separators are arranged in a tube cavity of the tightening pipe and are positioned on the first clamping piece, between the second clamping piece and the middle clamping piece, the risk of instrument failure caused by interference of the first clamping piece, the second clamping piece and the middle clamping piece can be reduced.

Description

Hemostatic clamp and auxiliary system

Technical Field

The utility model relates to the technical field of medical equipment, in particular to hemostatic clamp and auxiliary system.

Background

With the development and application of digestive endoscopy diagnosis and treatment technology, the technology for treating various benign and malignant gastrointestinal lesions by minimally invasive trauma under an endoscope is also popularized and applied. The safe and effective closing of the alimentary tract tissue defect/perforation in the operation is a key problem which must be solved. At present, the endoscope suturing apparatus mainly comprises a hemostatic clamp, a special endoscope suturing device and the like.

The medical instruments for closing large-area or complex-shaped tissue defects or perforations in the market comprise anastomosis clamps and special endoscopic stitching instruments, but the anastomosis clamps and the special endoscopic stitching instruments have high cost and belong to permanent implantation, and the special endoscopic stitching instruments have large volume, complicated operation, limited visual field and high cost, and the two products are not widely popularized in China.

Compared with an anastomosis clamp and a special suturing device for an endoscope, the hemostatic clamp has the characteristics of separable falling of a clamping head, low price, easy operation and the like, and is widely applied to closed treatment operations of large-area or complex-shaped tissue defects or perforations. The hemostatic clip has three petals of a first petal, a second petal and a middle petal. The first clamping piece and the second clamping piece can be opened or closed independently relative to the middle clamping piece. When in operation, one side of the tissue defect or the perforation is clamped by the first clamping piece and the middle clamping piece, and the other side of the tissue defect or the perforation is clamped by the second clamping piece and the middle clamping piece, so that the whole tissue defect or the perforation is closed. However, after the first clamping piece and the second clamping piece of the hemostatic clamp are sequentially clamped, the first clamping piece, the second clamping piece and the middle clamping piece are easy to interfere, so that the clamping head of the hemostatic clamp cannot be separated and fall off, the failure of an instrument is caused, the operation efficiency is influenced, and the operation failure is seriously caused.

Accordingly, there is an urgent need for improvements to existing hemostatic clips that reduce the risk of interference of the first, second, and intermediate clips, resulting in failure of the device.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hemostatic clamp and auxiliary system to reduce first clamping piece, second clamping piece and middle clamping piece and interfere, reduce the risk of apparatus trouble.

In order to solve the above technical problems, the present invention provides a hemostatic clamp, comprising a first clamping piece, a second clamping piece, a tightening tube, a middle clamping piece, a middle shaft assembly, a traction assembly, a control handle and at least two separators, wherein the control handle is connected to a proximal end of the traction assembly, a distal end of the traction assembly is connected to a proximal end of the middle shaft assembly, a distal end of the middle shaft assembly is connected to the tightening tube, proximal ends of the first clamping piece and the second clamping piece are disposed in the tightening tube, proximal ends of the first clamping piece and the second clamping piece are connected to the traction assembly, a proximal end of the middle clamping piece passes through the tightening tube and is fixedly connected to the middle shaft assembly, the first clamping piece and the second clamping piece are disposed at two sides of the middle clamping piece, the first clamping piece and the middle clamping piece form a clamp, the second clamping piece and the middle clamping piece form a clamp, the control handle is used for passing through the subassembly of drawing controls respectively first clamping piece with the second clamping piece is in tighten up intraductal reciprocating motion, so that the distal end of first clamping piece and/or the second clamping piece is close to or keeps away from middle clamping piece, thereby make with first clamping piece and/or the corresponding clip of second clamping piece opens or closes, the separator sets up in tightening up the lumen of pipe, and be located first clamping piece with middle clamping piece, the second clamping piece with between the middle clamping piece.

Optionally, the number of the separators is two, and the two separators are plate-shaped, and the separators are arranged in parallel.

Optionally, a limiting groove is formed in the tightening pipe, and the limiting groove is matched with the proximal ends of the first clamping piece and the second clamping piece to limit the first clamping piece and the second clamping piece to move towards the proximal end relative to the tightening pipe.

Optionally, the first clamping piece with the second clamping piece is kept away from be provided with spacing arch in the one side of the pipe wall of tightening pipe, be provided with on the distal end terminal surface of tightening pipe with spacing protruding separation blade of mutually supporting, the separation blade with spacing protruding mutually supporting is used for the restriction first clamping piece with the second clamping piece to the proximal end of tightening pipe removes.

Optionally, the axis subassembly includes sheath pipe front end pipe, connecting piece and pull ring, the near-end of sheath pipe front end pipe with pull the subassembly and connect, the distal end of sheath pipe front end pipe passes through the connecting piece with tighten up the pipe and can dismantle the connection, pull the subassembly and be used for driving the pull ring removes to the distal end, the pull ring makes to the in-process that the distal end removed the connecting piece with tighten up the pipe with sheath pipe front end pipe separation, the near-end setting of middle clamping piece is in the lumen of sheath pipe front end pipe, and with the lumen fixed connection of sheath pipe front end pipe.

Optionally, the connecting piece is an elastic piece, and when the elastic piece is released, the connecting piece is connected with the tightening tube and the sheath tube front end tube; when the elastic piece is pressed, the connecting piece is separated from the tightening pipe and the sheath pipe front end pipe.

Optionally, the near-end setting of tighten up the pipe is in on the distal end of sheath pipe front end pipe, tighten up and seted up two jacks on the pipe, set up on the pipe of sheath pipe front end with the spacing hole that the jack is corresponding, the elastic component is nearly type spring catch, works as when the spring catch releases, the both ends of spring catch pass the jack with spacing hole, works as when the spring catch pressurized, the both ends of spring catch are followed the jack with deviate from in the spacing hole.

Optionally, the traction assembly comprises a sheath, two core wires, two hooks and two connecting pins, the proximal end of the sheath is connected with the control handle, the distal end of the sheath is fixedly connected with the middle shaft assembly, the two core wires are arranged in the lumen of the sheath, the proximal end of the core wire is connected with the control handle, the distal end of the core wire is fixedly connected with the hooks, the two hooks are respectively connected with the first clamping piece and the second clamping piece through the connecting pins, and the control handle is used for drawing the first clamping piece and the second clamping piece to move in the tightening pipe in a reciprocating manner through the two core wires.

Optionally, if the force applied to the joint of the hook and the connecting pin is greater than a preset force, the hook and the connecting pin are separated.

Optionally, set up on the first clamping piece with the corresponding first pinhole of hook, set up on the second clamping piece with the corresponding second pinhole of hook the connecting pin with before hook and first clamping piece and second clamping piece are connected, the connecting pin is the tubulose, a plurality of cut grooves have been seted up on the connecting pin, cut the groove certainly the both ends of connecting pin to the mid portion of connecting pin extends the connecting pin with hook and first clamping piece and second clamping piece are connected the back, the connecting pin passes first pinhole with the hook, the external diameter at the both ends of connecting pin is greater than the external diameter of connecting pin mid portion.

Optionally, the hook is sheet-shaped, a deformation groove is formed in the hook, and the connecting pin penetrates through the deformation groove.

Optionally, the sheath includes first near-end sheath, second near-end sheath, distal end sheath and connecting pipe, the near-end of connecting pipe respectively with first near-end sheath with the distal end fixed connection of second near-end sheath, the distal end of connecting pipe with the near-end fixed connection of distal end sheath, the distal end of distal end sheath with sheath front end pipe fixed connection, first near-end sheath with the near-end of second near-end sheath respectively with one control handle fixed connection, two the core silk passes distal end sheath with behind the connecting pipe, pass respectively first near-end sheath with second near-end sheath, and with control handle connects.

The utility model also provides an auxiliary system, including the endoscope to and foretell hemostatic clamp, the endoscope is used for carrying and drawing hemostatic clamp.

The utility model provides a pair of hemostatic clamp and auxiliary system has following beneficial effect:

by disposing the divider in the lumen of the cinch tube with the divider between the first and intermediate clips, the second and intermediate clips, the first clamping piece, the second clamping piece and the middle clamping piece can be separated from each other and are not in direct contact, so that the first clamping piece and the middle clamping piece and the second clamping piece and the middle clamping piece can be prevented from interfering with each other, thereby facilitating the control handle to control the first clamping piece and the second clamping piece to reciprocate in the tightening pipe, leading the first clamp formed by the first clamping piece and the middle clamping piece to be opened and closed repeatedly, and the second clip formed by the second clip piece and the middle clip piece is repeatedly opened and closed, and the middle clip piece is convenient to be drawn out from the first clip piece and the second clip piece, thereby reducing the risk of inconvenient operation caused by the interference of the first clamping piece, the second clamping piece and the middle clamping piece.

Drawings

Fig. 1 is a schematic structural view of a hemostatic clamp according to a first embodiment of the present invention;

fig. 2 is a cross-sectional view of a first clip, a second clip, a cinch tube, an intermediate clip, and a center shaft assembly in accordance with a first embodiment of the present invention;

FIG. 3 is a cross-sectional view of a first clip, a second clip, and a cinch tube according to a first embodiment of the present invention;

FIG. 4 is a schematic structural view of a tightening pipe according to a first embodiment of the present invention;

FIG. 5 is a left side view of a cinch tube according to a first embodiment of the present invention;

FIG. 6 is a front view of a cinch tube according to a first embodiment of the present invention;

fig. 7 is a schematic structural view illustrating the first clamping piece and the second clamping piece being closed with the middle clamping piece according to the first embodiment of the present invention;

FIG. 8 is a cross-sectional view of a collet and central shaft assembly in accordance with an embodiment of the present invention;

FIG. 9 is a schematic view of a chuck and center shaft assembly in accordance with an embodiment of the present invention;

FIG. 10 is another schematic view of a collet and central shaft assembly in accordance with an embodiment of the present invention;

fig. 11 is a schematic structural view of a middle axle assembly according to an embodiment of the present invention;

FIG. 12 is a schematic view of a traction assembly according to an embodiment of the present invention;

fig. 13 is a schematic structural view of a hook according to a first embodiment of the present invention;

fig. 14 is a schematic structural view of a hook and a first jaw according to a first embodiment of the present invention;

FIG. 15 is a schematic view of the connection pin before the connection pin is connected to the hook and one of the first jaw or the second jaw according to the first embodiment;

FIG. 16 is a schematic view of the connection pin after the connection pin is connected to the hook and one of the first clip piece or the second clip piece according to the first embodiment;

FIG. 17 is a schematic structural view of a control handle in accordance with one embodiment;

FIG. 18 is an exploded view of control handle 180 according to one embodiment;

fig. 19 is a schematic view of a first clip formed by the first clamping piece and the middle clamping piece according to a first embodiment of the present invention after closing;

fig. 20 is a schematic structural view of a first clip formed by a first clamping piece and the middle clamping piece and a second clip formed by a second clamping piece and the middle clamping piece after closing in a first embodiment of the present invention;

FIG. 21 is a schematic structural view of the hemostatic clamp during separation of the hook from the connecting pin and separation of the tightening tube from the sheath front end tube according to the first embodiment of the present invention;

fig. 22 is a partial structural view of the hemostatic clamp during separation of the hook from the connecting pin and separation of the cinching tube from the sheath front end tube according to an embodiment of the present invention;

fig. 23 is a schematic view of another partial structure of the hemostatic clamp during the separation of the hook from the connecting pin and the separation of the tightening tube and the front tube of the sheath tube according to the first embodiment of the present invention;

FIG. 24 is a schematic structural view of a hemostatic clip according to the second embodiment;

FIG. 25 is an isometric view of a hemostatic clip of the second embodiment;

FIG. 26 is an enlarged partial view of the hemostatic clip of the second embodiment;

FIG. 27 is a schematic view showing the structure of the hemostatic clamp of the second embodiment;

FIG. 28 is a schematic view of the first clip formed by the first clip piece and the intermediate clip piece after closure;

FIG. 29 is a schematic view of a first clip formed by the first jaw and the intermediate jaw, with a second clip formed by the second jaw and the intermediate jaw closed;

FIG. 30 is a schematic view of the split collet shown with the bottom bracket assembly, the pulling assembly and the control handle.

Description of reference numerals:

110-a first jaw; 120-a second clip; 130-a limit protrusion; 140-a cinch tube; 141-a limit groove; 142-a baffle plate; 143-a socket; 150-an intermediate clip;

160-a bottom bracket assembly; 161-sheath front end tube; 162-a limiting hole; 163-a connector; 164-a tab;

170-a traction assembly; 171-sheath; 171 a-a first proximal sheath; 171 b-a second proximal sheath; 171 c-distal sheath; 172-connecting tube; 173-core filament; 174-hook; 175-deformation groove; 176-a connecting pin; 177-cutting the groove;

180-control handle; 181-handle body; 182-handle pull ring; 183-limit button; 184-a limiting part; 185-a limit tube; 186-limit buckle; 187-limit catch, 190-spacer.

Detailed Description

The hemostatic clamp and the auxiliary system according to the present invention will be described in detail with reference to the accompanying drawings and embodiments. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

Example one

The present embodiments provide a hemostatic clip. Referring to fig. 1 and 2, fig. 1 is a schematic structural view of a hemostatic clamp according to a first embodiment of the present invention, fig. 2 is a sectional view of a first clamping piece 110, a second clamping piece 120, a tightening tube 140, an intermediate clamping piece 150 and a middle shaft assembly 160 according to a first embodiment of the present invention, the hemostatic clamp includes the first clamping piece 110, the second clamping piece 120, the tightening tube 140, the intermediate clamping piece 150, the middle shaft assembly 160, a pulling assembly 170 and a control handle 180, the control handle 180 is connected to the pulling assembly 170, a distal end of the pulling assembly 170 is connected to a proximal end of the middle shaft assembly 160, a distal end of the middle shaft assembly 160 is connected to the tightening tube 140, proximal ends of the first clamping piece 110 and the second clamping piece 120 are disposed in the tightening tube 140, proximal ends of the first clamping piece 110 and the second clamping piece 120 are connected to the pulling assembly 170, a proximal end of the intermediate clamping piece 150 passes through the tightening tube 140 and is fixedly connected to the middle shaft assembly 160, the first clamping piece 110 and the second clamping piece 120 are arranged on two sides of the middle clamping piece 150, the first clamping piece 110 and the middle clamping piece 150 form a first clamp, the second clamping piece 120 and the middle clamping piece 150 form a second clamp, and the control handle 180 is used for controlling the first clamping piece 110 and the second clamping piece 120 to reciprocate in the tightening pipe 140 through the traction assembly 170 so as to open or close the first clamp and the second clamp.

Specifically, the reciprocating movement of the first clip 110 and the second clip 120 in the tightening tube 140 means that the first clip 110 and the second clip 120 move from the proximal end to the distal end or from the distal end to the proximal end in the tightening tube 140.

As the first clip 110 moves distally within the cinch tube 140, the distal end of the first clip 110 moves away from the intermediate clip 150 to open the first clip formed by the first clip 110 and the intermediate clip 150. As the first clip 110 moves proximally in the cinch tube 140, the distal end of the first clip 110 approaches the intermediate clip 150 to close the first clip formed by the first clip 110 and the intermediate clip 150. Similarly, when the second clip 120 moves distally in the tightening tube 140, the distal end of the second clip 120 can be moved away from the middle clip 150, so that the second clip formed by the first clip 110 and the middle clip 150 is opened, and when the second clip 120 moves in the tightening tube 140 toward the proximal end, the distal end of the second clip 120 can be moved close to the middle clip 150, so that the second clip formed by the second clip 120 and the middle clip 150 is closed. That is, in this embodiment, any one of first clip 110 and second clip 120 is moved distally in cinch tube 140 to open the first and second clips corresponding to first clip 110 and second clip 120; proximal movement of either of first clip 110 and second clip 120 within cinch tube 140 may cause first clip 110 and second clip 120 to respectively close with the first clip and second clip formed by intermediate clip 150.

Wherein, the middle clip 150 mainly plays a role of fixing and supporting.

Referring to fig. 3, fig. 4, fig. 5 and fig. 6, fig. 3 is a cross-sectional view of the first clamping piece 110, the second clamping piece 120 and the tightening pipe 140 in the first embodiment of the present invention, fig. 4 is a schematic structural view of the tightening pipe 140 in the first embodiment of the present invention, fig. 5 is a left side view of the tightening pipe 140 in the first embodiment of the present invention, fig. 6 is a front view of the tightening pipe 140 in the first embodiment of the present invention, the hemostatic clamp further includes at least two separators 190, the separators 190 are disposed in the lumen of the tightening pipe 140 and located between the first clamping piece 110 and the middle clamping piece 150, and between the second clamping piece 120 and the middle clamping piece 150.

By disposing the dividing element 190 in the lumen of the tightening tube 140, and making the dividing element 190 located between the first clip 110 and the middle clip 150, and the second clip 120 and the middle clip 150, the first clip 110, the second clip 120 and the middle clip 150 can be separated from each other and not directly contacted, so that when the middle clip is pulled out, the situation that the middle clip cannot be pulled out due to the direct contact and interference of the first clip and the second clip in the prior art can be avoided, thereby facilitating the control handle 180 to control the first clip 110 and the second clip 120 to move back and forth in the tightening tube 140, repeatedly opening and closing the first clip formed by the first clip 110 and the middle clip 150, repeatedly opening and closing the second clip formed by the second clip 120 and the middle clip 150, and facilitating the middle clip 150 to be pulled out from the first clip 110 and the second clip 120, thereby reducing interference with the intermediate jaw 150 due to the first jaw 110, the second jaw 120.

Specifically, as shown in fig. 3, 4, 5 and 6, the number of the spacers 190 is two, and both the spacers 190 are plate-shaped, both sides of the spacers 190 are respectively fixedly connected to the tube wall of the tightening tube 140, and the two spacers 190 are parallel to each other. In other embodiments, one side of each spacer 190 is fixedly connected to the wall of the cinch tube 140, and the other side of the spacer 190 is a free end. That is, the first clip 110, the second clip 120 and the middle clip 150 may be provided with a partition 190 that may completely separate the first clip 110 from the middle clip 150, the second clip 120 from the middle clip 150, or partially separate them.

In other embodiments, the number of the spacers 190 may be more than one. When the number of the spacers 190 is four, the spacers 190 may be implemented such that one side of the spacer 190 is fixedly connected to the tube wall of the tightening tube 140, the other side of the spacer 190 is a free end, the free end of the spacer 190 is not fixedly connected to the tube wall of the tightening tube, two spacers 190 are a set to separate the first clip 110 from the middle clip 150, and the other two spacers 190 are a set to separate the second clip 120 from the middle clip 150, in this embodiment, the spacer 190 is a plate-shaped rib or a plate-shaped rib extending from the tube wall of the tightening tube 140 to the inside of the tube cavity and disposed along the axial direction of the tightening tube 140. For another example, when the number of the partitions 190 is three, one side of each partition 190 is fixedly connected to the tube wall of the tightening tube 140, and the other side of each partition 190 is a free end, wherein two partitions 190 are a group to separate the first clip 110 from the intermediate clip 150, and the other partition 190 separates the second clip 120 from the intermediate clip 150, and the three partitions 190 are each a plate-shaped rib or a plate-shaped rib extending from the tube wall of the tightening tube 140 toward the inside of the tube cavity and disposed along the axial direction of the tightening tube 140. Of the three spacers 190, the two sides of the spacer 190 for separating the second clip 120 from the middle clip 150 may be fixedly connected to the tube wall of the tightening tube 140.

In this embodiment, the separating members 190 are both plate-shaped, and both sides of the separating members 190 are respectively and fixedly connected with the tube wall of the tightening tube 140, so as to completely separate the first clip 110 from the middle clip 150, and the second clip 120 from the middle clip 150; one side of the dividing element 190 is fixedly connected with the pipe wall of the tightening pipe 140, the other side of the dividing element 190 is a free end, which can partially separate the first clamping piece 110 from the middle clamping piece 150 and the second clamping piece 120 from the middle clamping piece 150, although the dividing element 190 can not directly separate the first clamping piece 110 from the middle clamping piece 150 and the second clamping piece 120 from the middle clamping piece 150, the dividing element 190 has a certain thickness, and a certain gap still exists between the first clamping piece 110 and the middle clamping piece 150 and between the second clamping piece 120 and the middle clamping piece 150, so that the mutual interference between the first clamping piece 110 and the middle clamping piece 150 and the mutual interference between the second clamping piece 120 and the middle clamping piece 150 can be avoided.

The spacer 190 is disposed along the axial direction of the cinch tube 140. The plurality of spacers 190 may be sequentially spaced along the axial direction of the tightening tube 140, or one spacer 190 may be disposed along the axial direction of the tightening tube 140, as long as the spacer 190 can separate the first clip 110 from the middle clip 150 and the second clip 120 from the middle clip 150. That is, the spacers 190 may be disposed continuously or intermittently in the axial direction of the cinch tube 140, and the length of each spacer 190 in the axial direction of the cinch tube 140 may be different.

As shown in FIG. 6, the spacer 190 has a length in the axial direction that is less than the length of the receiver tube in the axial direction to facilitate the machining of the cinch tube 140 and to facilitate the connection of the cinch tube 140 to the spacer 190 and the bottom bracket assembly 160.

In this embodiment, the tightening tube 140 and the spacer 190 may be integrally formed or may be formed by welding. The cinch tube 140 and the spacer 190 may also be formed from at least two metal sheets that are fold welded.

In this embodiment, the separating element 190 is preferably slidably connected to the first clip 110, the second clip 120 and the middle clip 150, so that the interference between the first clip 110 and the middle clip 150 and the interference between the second clip 120 and the middle clip 150 can be avoided, and the smoothness of the repeated movement of the first clip 110, the middle clip 150 and the second clip 120 can be improved, thereby improving the operation feeling and the operation efficiency.

Referring to fig. 4 and 7, fig. 7 is a schematic structural view illustrating a first clamping piece 110, a second clamping piece 120 and a middle clamping piece 150 of the first embodiment of the present invention are closed, and a limiting groove 141 is formed on the tightening pipe 140. Specifically, when the proximal ends of the first clip 110 and the second clip 120 move to the limiting groove 141, under the compression of the tightening tube 140, the proximal ends of the first clip 110 and the second clip 120 are inserted into the limiting groove 141, so that the limiting groove 141 is matched with the proximal ends of the first clip 110 and the second clip 120, and the first clip 110 and the second clip 120 are limited to continue moving to the proximal end, thereby preventing the first clip 110 and the second clip 120 from passing out of the proximal end of the tightening tube 140. In this way, the risk of the first clip 110 and the second clip 120 coming out of the proximal end of the cinch tube 140 can be reduced, and the reliability of the hemostatic clip can be improved. The proximal ends of the first clip piece 110 and the second clip piece 120 are matched with the limiting groove 141, and the proximal ends of the first clip piece 110 and the second clip piece 120 are clamped in the limiting groove 141.

In order to further prevent the first clip and the second clip from being spread out from the proximal end of the tightening tube, a limiting protrusion 130 is disposed on a side of the first clip 110 and the second clip 120 away from the wall of the tightening tube 140, so as to perform a double limiting function. Specifically, referring to fig. 2, 3, 4 and 7, a blocking piece 142 is disposed on the distal end surface of the tightening tube 140 and is engaged with the limiting protrusion 130, and the blocking piece 142 is engaged with the limiting protrusion 130 to limit the first clip 110 and the second clip 120 from moving toward the proximal end of the tightening tube 140. In this way, the first clip 110 and the second clip 120 can be further prevented from passing out of the proximal end of the cinch tube 140, further improving the reliability of the secondary hemostatic clip. Specifically, when the proximal ends of the first clip piece 110 and the second clip piece 120 move to the position of the limiting groove 141, after the limiting groove 141 is matched with the proximal ends of the first clip piece 110 and the second clip piece 120, the limiting protrusion 130 can further limit the proximal movement of the first clip piece 110 and the second clip piece 120, so as to prevent the first clip piece 110 and the second clip piece 120 from penetrating out of the proximal end of the tightening tube 140, so that a double limiting effect can be achieved, and the risk that the first clip piece 110 and the second clip piece 120 penetrate out of the proximal end of the tightening tube 140 is reduced.

In other embodiments, the limiting protrusion 130 may be further disposed on a surface of the first clip 110 and the second clip 120 close to the wall of the tightening tube 140, so long as after the first clip 110 and the second clip 120 move towards the proximal end of the tightening tube 140 to a position where the limiting protrusion 130 is engaged with the distal end of the tightening tube 140, and/or after the limiting protrusion is engaged with the blocking piece 142 disposed on the distal end of the tightening tube 140, the first clip 110 and the second clip 120 are limited from further moving towards the proximal end.

The outer diameter of the tightening pipe 140 is 2.2-2.6 mm, and the length is 5-8 mm. The first and

second jaws

110 and 120 and the tightening tube 140 may be made of a titanium alloy material or a stainless steel material. The opening angle between the first clip piece 110, the second clip piece 120 and the middle clip piece 150 is 15-75 degrees.

Hemostatic clamp referring to fig. 8, 9, 10, and 11, fig. 8 is a cross-sectional view of a collet and a central shaft assembly 160 according to an embodiment of the present invention, wherein the cinch tube 140, the first jaw 110, and the second jaw 120 form the collet of the hemostatic clamp. Fig. 9 is a schematic structural diagram of a middle clamp and a middle shaft assembly 160 in a first embodiment of the present invention, fig. 10 is another schematic structural diagram of a middle clamp and a middle shaft assembly 160 in a first embodiment of the present invention, and fig. 11 is a schematic structural diagram of a middle shaft assembly 160 in a first embodiment of the present invention, the middle shaft assembly 160 includes a sheath front end tube 161, a connecting member 163, and a pull ring 164.

The proximal end of the sheath front tube 161 is connected to the pulling assembly 170 (refer to fig. 1), and the distal end of the sheath front tube 161 is detachably connected to the tightening tube 140 through the connector 163. The pulling assembly 170 is configured to drive the pulling ring 164 to move distally, and the pulling ring 164 separates the connecting member 163 from the tightening tube 140 and the sheath front tube 161 during the distal movement. The proximal end of the middle clip 150 is disposed in the lumen of the sheath front end tube 161 and is fixedly connected to the lumen of the sheath front end tube 161, so that the pulling assembly 170 can drive the pulling ring 164 to move toward the distal end, thereby separating the connecting member 163 from the sheath front end tube 161 and the tightening tube 140, and further separating the sheath front end tube 161 from the tightening tube 140. When the sheath front tube 161 and the tightening tube 140 have been separated and the first and

second jaws

110, 120 have clamped the tissue, the shaft assembly can be separated from the collet and the middle jaw 150 can be separated from the first and

second jaws

110, 120 if the middle shaft assembly 160 is further moved proximally as a whole by the pulling assembly 170.

The connecting member 163 is an elastic member, and when the elastic member is released, the connecting member 163 is connected to the tightening tube 140 and the sheath front end tube 161, respectively, so that the tightening tube 140 and the sheath front end tube 161 are connected; when the elastic member is compressed, the connection member 163 is separated from the tightening tube 140 and the sheath front end tube 161, thereby separating the tightening tube 140 and the sheath front end tube 161.

As shown in fig. 8, the proximal end of the tightening tube 140 is sleeved on the distal end of the sheath front end tube 161, two insertion holes 143 are formed on the tightening tube 140, and a limiting hole 162 corresponding to the insertion hole 143 is formed on the sheath front end tube 161. The elastic member is a spring pin of several types, when the spring pin is released, two ends of the spring pin pass through the insertion hole 143 and the limiting hole 162, so as to limit the axial movement of the tightening tube 140 relative to the sheath front end tube 161, especially to limit the axial separation of the tightening tube 140 and the sheath front end tube 161, and when the spring pin is pressed, two ends of the spring pin are disengaged from the insertion hole 143 and the limiting hole 162.

The spring pin can be made of metal materials such as stainless steel through bending. The pull ring 164 may be a metal ring or a plastic ring.

The sheath front end tube 161 and the middle clip 150 may be fixedly connected by welding, and may also be fixedly connected by welding with the pulling assembly 170. The sheath front end tube 161 may be a metal tube, such as a stainless steel tube.

The length of the sheath front end pipe 161 is 3-8 mm, and the sheath front end pipe can be made of stainless steel or titanium alloy materials.

Referring to fig. 11, the middle clip 150 is in the shape of a sheet, and the middle clip 150 may be cut from a metal sheet.

Referring to fig. 12, 13 and 14, fig. 12 is a schematic structural view of a traction assembly 170 according to a first embodiment of the present invention, fig. 13 is a schematic structural view of a hook 174 according to a first embodiment of the present invention, fig. 14 is a schematic structural view of the hook 174 and the first clamping piece 110 according to the first embodiment of the present invention, the pulling assembly 170 comprises a sheath 171, two core wires 173, two hooks 174 and two connecting pins 176, the proximal end of the sheath tube 171 is connected to the control handle 180, the distal end of the sheath tube 171 is fixedly connected to the middle shaft assembly 160 (the distal end of the sheath tube front tube 161), the two core wires 173 are disposed in the lumen of the sheath tube 171, the proximal end of the core wire 173 is connected to the control handle 180, the distal end of the core wire 173 is fixedly connected to the hooks 174, and the two hooks 174 are connected to the first clip 110 and the second clip 120 through the connecting pins 176, respectively. The control handle 180 is used for pulling the first clip 110 and the second clip 120 to reciprocate in the tightening tube 140 through the two core wires 173, so as to open or close a first clip formed by the first clip 110 and the middle clip 150 and a second clip formed by the second clip 120 and the middle clip 150. If the force applied to the connection between the hook 174 and the connection pin 176 is greater than a predetermined force, the hook 174 and the connection pin 176 are separated.

Since the hook 174 and the connection pin 176 are separated when the connection between the hook 174 and the connection pin 176 is subjected to a force greater than a predetermined force, the indirect connection between the hook 174 and the first clip 110 or the second clip 120 via the connection pin 176 may be disabled, thereby disconnecting the pulling assembly 170 from the first clip 110 and the second clip 120. Since the drawing assembly 170 is disconnectable from the first jaw 110 and the second jaw 120 and the center shaft assembly 160 is disconnectable from the cinch tube 140, the first jaw 110, the second jaw 120, and the cinch tube 140 can be separated from the middle jaw 150, the center shaft assembly 160, the drawing assembly 170, and the control handle 180.

Specifically, if the force applied to the connection between the hook 174 and the connection pin 176 is greater than a predetermined force, the hook 174 is disengaged from the connection sheath, so that the connection between the first clip 110 or the second clip 120 and the hook 174 is disabled.

Referring to fig. 15 and 16, fig. 15 is a schematic structural view of a connection pin 176 before the connection pin 176 is connected to the hook 174 and one of the first clip 110 or the second clip 120 in the first embodiment, fig. 16 is a schematic structural view of the connection pin 176 after the connection pin 176 is connected to the hook 174 and one of the first clip 110 or the second clip 120 in the first embodiment, the first clip 110 is provided with a first pin hole corresponding to the connection pin 176, the second clip 120 is provided with a second pin hole corresponding to the connection pin 176, the connection pin 176 is tubular before the connection pin 176 is connected to the hook 174 and the first clip 110 and the second clip 120, the connection pin 176 is provided with a plurality of cut grooves 177, and the cut grooves 177 extend from two ends of the connection pin 176 to a middle portion of the connection pin 176. After the connection pin 176 is connected to the hook 174 and the first and

second jaws

110 and 120, the connection pin 176 passes through the first pin hole and the hook 174, and the outer diameters of both ends of the connection pin 176 are larger than the outer diameter of the middle portion of the connection pin 176.

In the process of connecting the hook 174 and the first jaw 110 by the connecting pin 176, one connecting pin 176 is inserted through the first pin hole and the hook 174, the other connecting pin 176 is inserted through the second pin hole and the hook 174, and forces are applied to both ends of the two connecting pins 176 to turn the both ends of the connecting pin 176 in a direction away from the axis of the connecting pin 176, so that the outer diameter of both ends of the connecting pin 176 is larger than the outer diameter of the middle portion of the connecting pin 176, thereby limiting the first jaw 110 and the hook 174 or the second jaw 120 and the hook 174 disposed between both ends of the connecting pin 176 from being separated from each other, so that the first jaw 110 and the hook 174 are connected by the connecting pin 176, and the second jaw 120 and the hook 174 are connected by the connecting pin 176.

Specifically, before the connection pin 176 is connected to the hook 174 and one of the first jaw 110 or the second jaw 120, the length of the connection pin 176 in the axial direction is between 2mm and 3 mm. The connecting pin 176 is a stainless steel metal tube. The stainless steel metal pipe can be formed by laser cutting, and the cutting groove 177 on the stainless steel metal pipe can also be processed by laser cutting. The connecting pin 176 has the advantages of simple processing, convenient operation and high reliability.

Referring to fig. 13 and 14, the hook 174 is formed in a plate shape, a deformation groove 175 is formed on the hook 174, and the connection pin 176 is disposed through the deformation groove 175. When the connection between the hook 174 and the connection pin 176 is subjected to a force greater than a predetermined force, the deformation groove 175 is deformed, thereby separating the hook 174 from the connection pin 176.

The hook 174 is fixedly connected to the core wire 173 by laser welding.

Referring to fig. 9 and 10, the pull ring 164 is disposed in the front metal tube of the sheath 171, and one of the core wires 173 and one side of the elastic member are disposed through the pull ring 164. The core wire 173 is made of stainless steel or titanium alloy.

Referring to fig. 12, the sheath 171 includes a first proximal sheath 171a, a second proximal sheath 171b, a distal sheath 171c and a connection tube 172, a proximal end of the connection tube 172 is fixedly connected to distal ends of the first proximal sheath 171a and the second proximal sheath 171b, respectively, a distal end of the connection tube 172 is fixedly connected to a proximal end of the distal sheath 171c, a distal end of the distal sheath 171c is fixedly connected to the sheath front tube 161, and proximal ends of the first proximal sheath 171a and the second proximal sheath 171b are fixedly connected to one control handle 180, respectively. After passing through the distal sheath 171c and the connection tube 172, the two core wires 173 pass through the first proximal sheath 171a and the second proximal sheath 171b, respectively, and are connected to the control handle 180. In this manner, the first jaw 110 and the second jaw 120 can be controlled by two control handles 180, respectively, which can improve the flexibility of the instrument. And two control handles 180 can be operated by two persons, so that the requirement on the proficiency of doctors in endoscopic surgery is lower, the difficulty of the surgery is low, and the popularization and the application of the front-edge treatment surgery under the endoscope are facilitated.

The sheath front end tube 161 may be fixedly connected to the distal end of the distal sheath 171c by laser welding, the distal end of the connection tube 172 may be fixedly connected to the proximal end of the distal sheath 171c by welding, and the proximal end of the connection tube 172 may be fixedly connected to the first proximal sheath 171a and the second proximal sheath 171b by welding.

The first proximal sheath 171a, the second proximal sheath 171b, the distal sheath 171c, and the connection tube 172 have outer diameters of 2 to 2.4 mm. The first proximal sheath 171a and the second proximal sheath 171b have a length of 50 to 150 mm. The distal sheath 171c has a length of 120 to 250 mm. The length of the connecting pipe 172 is 10-30 mm.

Referring to fig. 17 and 18, fig. 17 is a schematic structural view of control handle 180 according to the first embodiment, and fig. 18 is an exploded view of control handle 180 according to the first embodiment, and first proximal sheath 171a and second proximal sheath 171b are fixedly connected to one control handle, respectively. The control handle 180 comprises a handle body 181, a handle pull ring 182 and a limit buckle 183, wherein the handle pull ring 182 is sleeved on the handle body 181 and can reciprocate relative to the handle body 181. The limit buckle 183 is clamped with the far end of the handle body 181. The first proximal sheath 171a and the second proximal sheath 171b are fixedly connected to the corresponding limit buckle 183 and the handle body 181. The handle body 181 has a control cavity with an opening at the far end, the limit buckle 183 has a limit cavity, and the near end and the far end of the limit cavity are provided with openings. The near end of the limiting cavity is communicated with the control cavity. The core wire 173 sequentially passes through the corresponding limiting cavity and the control cavity to be fixedly connected with the handle pull ring 182. The core wire 173 is driven to reciprocate by driving the handle pull ring 182 to reciprocate relative to the handle body 181, thereby drawing the first jaw 110 and the second jaw 120 to reciprocate.

Specifically, the subassembly that pulls still includes the spacing ring, first near-end sheath 171 a's near-end with spacing ring fixed connection, second near-end sheath 171 b's near-end with spacing ring fixed connection, be provided with a spacing portion in the spacing chamber of spacing knot 183, spacing portion is cyclic annular, with first near-end sheath 171a with two spacing ring settings that second near-end sheath 171b connects are in the spacing chamber that corresponds, spacing portion is used for the restriction the spacing ring is relative spacing knot 183 moves to the distal end. The distal end of the handle body extends to form a limiting tube, the limiting tube is arranged in the limiting cavity and is used for limiting the limiting ring to move towards the proximal end relative to the limiting buckle 183. Therefore, under the combined action of the limiting buckle 183 and the limiting cavity, the limiting ring is limited from moving in the limiting cavity, and further, the first proximal end sheath tube 171a or the second proximal end sheath tube 171b fixedly connected with the limiting ring is limited from moving. Wherein, the spacing ring can be made of metal materials.

The proximal end of limit buckle 183 extends to have a limit buckle, be provided with on the handle body 181 with the limit slot of limit buckle joint, limit buckle 183 with the handle body 181 passes through limit buckle with the joint fixed connection of limit slot.

The control handle 180 is made of ABS plastic.

In this embodiment, the first clip 110 and the second clip 120 can be opened and closed independently and repeatedly.

Specifically, since the two control handles 180 for controlling the first clip 110 or the second clip 120 to repeatedly open and close are independent of each other, and the process and the principle of the control handles 180 for controlling the first clip 110 or the second clip 120 are similar, the principle of the first clip 110 and the second clip 120 to repeatedly open and close will be described below only by taking the control handles 180 for driving the first clip 110 to repeatedly open and close as an example.

By pulling the handle pull ring 182 of the control handle 180, the handle pull ring 182 is moved proximally relative to the handle body 181, so that the handle pull ring 182 pulls the core wire 173 proximally relative to the handle body 181, and the first clip 110 is pulled proximally by the core wire 173, so that the distal end of the first clip 110 is close to the middle clip 150, thereby closing the first clip formed by the first clip 110 and the middle clip 150. Wherein the core wire 173, the hook 174 and the connecting pin 176 are pulled by the handle pull ring 182 to move proximally, and the first jaw 110 is pulled by the connecting pin 176 to move proximally. In the process of pulling the handle pull ring 182 to move the handle pull ring 182 proximally relative to the handle body 181, before the proximal end of the first clip 110 is engaged with the limiting groove 141 in the tightening tube 140, the handle pull ring 182 is moved distally relative to the handle body 181 by pulling the handle pull ring 182, so that the distal end of the first clip 110 is away from the middle clip 150, and the first clip formed by the first clip 110 and the middle clip 150 is opened. Therefore, according to the operation requirement, in the using process, the handle pull ring 182 is pulled to enable the handle pull ring 182 to move towards the near end or the far end relative to the handle body 181, so that the first clip formed by the first clip 110 and the middle clip 150 is closed or opened, the operability of the hemostatic clip can be improved, the operation by a doctor is facilitated, and the operation efficiency is improved.

In this embodiment, first clip 110, second clip 120, and cinch tube 140 may be separate from bottom bracket assembly 160 and pull assembly 170. Wherein the cinch tube 140, the first jaw 110, and the second jaw 120 form a collet of the hemostatic clamp.

First, the first jaw 110 and the second jaw 120 can be controlled to be closed by two control handles 180, respectively. Specifically, since the two control handles 180 for controlling the closing of the first clamping piece 110 or the second clamping piece 120 are independent of each other, and the process and principle of the control handles 180 for controlling the closing of the first clamping piece 110 or the second clamping piece 120 are similar, the process of closing the first clamping piece 110 and the second clamping piece 120 will be described below only by taking the control handles 180 for driving the first clamping piece 110 to close.

By pulling the handle pull ring 182, the handle pull ring 182 is moved proximally with respect to the handle body 181, so that the handle pull ring 182 pulls the core wire 173 proximally with respect to the handle body 181, and the first clip 110 is pulled proximally with respect to the handle body 181 by the core wire 173, and the distal end of the first clip 110 is brought close to the middle clip 150, thereby closing the first clip formed by the first clip 110 and the middle clip 150. When the first clip piece 110 moves to the proximal end of the first clip piece 110 to be matched with the limiting groove 141, the limiting groove 141 limits the first clip piece 110 to move further to the proximal end, and at this time, the second clip formed by the first clip piece 110 and the middle clip piece 150 is closed. Fig. 19 is referred to a condition after the first clip formed by the first clip piece 110 and the middle clip piece 150 is closed, and fig. 19 is a schematic structural view after the first clip formed by the first clip piece 110 and the middle clip piece 150 is closed according to a first embodiment of the present invention. Fig. 20 is referred to a case where the first clip formed by the first clip sheet 110 and the middle clip sheet 150 and the second clip formed by the second clip sheet 120 and the middle clip sheet 150 are both closed, and fig. 20 is a schematic structural view of the first clip sheet 110 and the first clip formed by the middle clip sheet 150 and the second clip formed by the second clip sheet 120 and the middle clip sheet 150 in the first embodiment of the present invention after being closed.

Then, if the handle pull ring 182 is further pulled, under the action of the core wire 173, the pulling force applied to the connection between the core wire 173 and the first clip 110 or the connection between the core wire 173 and the second clip 120 is greater than the predetermined force, and then the connection between the first clip 110 and the core wire 173 and the connection between the second clip 120 and the core wire 173 are disconnected. Wherein, when the pulling force applied to the connection portion of the first jaw 110 and the second jaw 120 is greater than the predetermined force, the deformation groove 175 in the hook 174 is deformed, and the hook 174 is separated from the connection pin 176, so that the connection between the first jaw 110 and the second jaw 120 and the pulling assembly 170 is disconnected.

Thereafter, if the handle pull ring 182 is further pulled, i.e. the core wire 173 and the hook 174 are further pulled to move proximally, the core wire 173 will drive the pull ring 164 to move proximally, and the pull ring 164 will separate the connector 163 from the tightening tube 140 and the sheath front tube 161 during the proximal movement. Specifically, since the core wire 173 and the elastic member on one side are disposed through the pull ring 164, after the hook 174 is separated from the first clip 110 and the second clip 120, if the core wire 173 is continuously pulled, the core wire 173 and the hook 174 will drive the pull ring 164 to move proximally, during the process that the pull ring 164 moves proximally, the pull ring 164 may cause the two ends of the connecting member 163 to approach each other, and the two ends of the connecting member 163 may be released from the tightening pipe 140 and the sheath front end pipe 161, so that the connecting member 163 is separated from the tightening pipe 140 and the sheath front end pipe 161. Fig. 21, fig. 22 and fig. 23 can be referred to for the case that the hook 174 is separated from the connecting pin 176 and the tightening tube 140 is separated from the sheath front end tube 161, wherein fig. 21 is a schematic structural view of the hemostatic clamp in the process that the hook 174 is separated from the connecting pin 176 and the tightening tube 140 is separated from the sheath front end tube 161 in the first embodiment of the present invention, fig. 22 is a schematic structural view of a part of the hemostatic clamp in the process that the hook 174 is separated from the connecting pin 176 and the tightening tube 140 is separated from the sheath front end tube 161 in the first embodiment of the present invention, and fig. 23 is a schematic structural view of another part of the hemostatic clamp in the process that the hook 174 is separated from the connecting pin 176 and the tightening tube 140 is separated from the sheath front end tube 161.

As core wire 173 is sequentially separated from first jaw 110 and second jaw 120 and cinch tube 140 is separated from coupling 163 and sheath forward tube 161 during proximal movement of toggle handle pull ring 182 relative to handle body 181, first jaw 110, second jaw 120, and cinch tube 140 are separated from tow assembly 170 and central shaft assembly 160. In this manner, after first jaw 110, second jaw 120, and cinch tube 140 are separated from distraction assembly 170 and core wire 173 during a surgical procedure, the position of the separated jaws may be easily adjusted by other means. Since coupling pin 176 is not separated from first clip 110 or second clip 120 when hook 174 is separated from coupling pin 176, coupling pin 176 will be separated from draft assembly 170 and center assembly 160 with first clip 110, second clip 120, and cinch tube 140.

The present embodiment also provides an auxiliary system, which includes the hemostatic clip in the above embodiments, and an endoscope for delivering and retracting the hemostatic clip.

In this embodiment, the process of closing the defective tissue by the auxiliary system is substantially as follows:

first, the defective tissue is found by an endoscope.

Next, the hemostatic clamp is delivered to the site of the defective tissue through an endoscopic channel in the endoscope, and the first jaw 110 and the second jaw 120 of the hemostatic clamp are released through the endoscopic channel. The released hemostatic clamp has the first jaw 110 and the second jaw 120 in an open state.

Next, the first jaw 110, the second jaw 120 and the middle jaw 150 are caused to clamp the lesion by driving the

hemostatic jaws

110 and 120 to repeatedly open and close. In the process of clamping the lesion by the clamping head, one of the first clamping piece 110 or the second clamping piece 120 and the middle clamping piece 150 can be controlled by a control handle 180 to clamp one side of the defective tissue, so that the first clamping piece 110 and the middle clamping piece 150 are closed, and the first clamping piece 110 and the connecting pin 176 are separated from the corresponding hook 174. The second jaw 120 and the middle jaw 150 are pulled by the endoscope to clamp the other side of the defect tissue, and the other control handle 180 is also controlled to close the second jaw 120 and the middle jaw 150 and separate the second jaw 120 and the connecting pin 176 from the corresponding hook 174.

Then, the two control handles 180 pull the core wire 173 to separate the pulling assembly 170 from the first clip 110 and the second clip 120, and the core wire 173 pulls to separate the tightening tube 140 from the metal tube at the front end of the sheath tube 171, so that the middle clip 150 is pulled out from between the two separators, thereby preventing the first clip 110 and the second clip 120 from directly contacting and interfering with each other and being unable to be pulled out, and further, the clip is dropped off to close the defective tissue or stop bleeding.

Example two

The present embodiments provide a hemostatic clip. The main difference between the hemostatic clip of this embodiment and the hemostatic clip of the first embodiment is that the number of the control handles 180 is one, one control handle 180 can control the first clamping piece 110 and the second clamping piece 120 respectively, and the sheath only includes a single sheath, and the proximal end of the single sheath is fixedly connected to the control handle. Specifically, referring to fig. 24, fig. 25 and fig. 26, fig. 24 is a schematic structural view of a hemostatic clip according to the second embodiment, fig. 25 is an isometric view of the hemostatic clip according to the second embodiment, fig. 26 is a partially enlarged schematic view of the hemostatic clip according to the second embodiment, the control handle 180 includes a handle body 181, two handle pull rings 182 and a limit buckle 183, the two handle pull rings 182 are slidably connected to the handle body 181, and the handle pull ring 182 is capable of reciprocating relative to the handle body 181. The limit buckle 183 is clamped with the far end of the handle body 181.

Referring to fig. 27, fig. 27 is a schematic structural view of the hemostatic clip according to the second embodiment, in which the sheath of the sheath assembly is only a single sheath, and two core wires of the traction assembly are disposed in the lumen of the sheath. The proximal end of the sheath tube 171 is fixedly connected with the handle body and the limit buckle 183. The handle body 181 has a control cavity with an opening at the far end, the limit buckle 183 has a limit cavity, and the near end and the far end of the limit cavity are provided with openings. The near end of the limiting cavity is communicated with the control cavity. The two core wires 173 sequentially penetrate through the limiting cavity and the control cavity to be fixedly connected with the corresponding handle pull rings 182. The corresponding core wire 173 can be driven to reciprocate by driving the handle pull ring 182 to reciprocate relative to the handle body 181. Specifically, referring to fig. 26, the pulling assembly further includes a limiting ring, and the sheath 171 is fixedly connected to the limiting ring. A limiting part 184 is arranged in the limiting cavity of the limiting buckle 183, and the limiting part 184 is annular. The limiting ring is arranged in the limiting cavity, and the limiting part 184 is used for limiting the limiting ring to move towards the far end relative to the limiting buckle 183. A limit tube 185 extends from the distal end of the handle body, the limit tube 185 is disposed in the limit cavity, and the limit tube 185 is used for limiting the limit ring to move towards the proximal end relative to the limit buckle 183. So, limit buckle 183 with under the combined action in spacing chamber, the restriction spacing ring removes in spacing intracavity, and then the restriction with spacing ring fixed connection's sheath pipe removes. Wherein, the spacing ring can be made of metal materials.

As shown in fig. 26, a limit buckle 186 extends from a proximal end of the limit buckle 183, a limit slot 187 is provided on the handle body 181, and the limit buckle 183 is connected to the handle body 181 by the limit buckle 186 and the limit slot 187.

In this embodiment, as for the process of controlling the opening and closing of the first clamping piece and the second clamping piece relative to the intermediate clamping piece by the control handle, reference is made to fig. 28, fig. 29 and fig. 30, fig. 28 is a schematic structural view of a closed first clip formed by the first clamping piece and the intermediate clamping piece, fig. 29 is a schematic structural view of a closed first clip formed by the first clamping piece and the intermediate clamping piece, a schematic structural view of a closed second clip formed by the second clamping piece and the intermediate clamping piece, and fig. 30 is a schematic structural view of a separated clamping head from the middle shaft assembly, the traction assembly and the control handle.

The hemostatic clamp in the above embodiment adopts a three-flap structure, and the first clamping piece 110 and the second clamping piece 120 can be independently controlled by the two control handles 180, so that the flexibility of the instrument in the operation is improved. The first clip 110 and the middle clip 150 are aligned with the tissue on the wound side, and then the tissue on the wound side is firmly grabbed and fixed. Then, the second clamping piece 120 is used for aligning the tissue on the other side of the wound surface, firmly grabbing and fixing the tissue on the other side of the wound surface, the grabbing process is simple and reliable in operation, and the tissue defect or perforation closure with a large area or a complex shape can be realized.

The first clamping piece 110 and the second clamping piece 120 can be opened and closed repeatedly, the positioning times are not limited, the relative positions of the instrument and the tissue can be adjusted repeatedly, the clamping head falls off after the positions are proper, and the situations that the grabbing positions are not ideal or the tissue is damaged can be avoided. The middle clip 150 mainly serves to fix and support, facilitate positioning and clamping and pulling of the defective tissue, and is released along with the middle shaft assembly 160 after the first clip 110 and the second clip 120 are closed.

In the above embodiments, the hemostatic clamp may be used for double-person operated endoscopic surgical treatment, including hemostasis, perforation closure, fistula closure, defect tissue repair, or as an auxiliary tool for other treatment methods. The term "endoscope" as used herein refers to medical endoscopes for therapeutic or examination purposes, including gastroscopes, enteroscopes, duodenoscopes, enteroscopes, cholangioscopes, bronchoscopes, or other endoscopes defining an operative channel (or working channel). In addition, the hemostatic clamp can also be used for double-handle operation under the endoscope or matching with other apparatuses of the endoscope to perform hemostasis or puncture repair.

The "proximal" and "distal" in the above embodiments are relative orientations, relative positions, directions of elements or actions with respect to each other from the perspective of a physician using the medical device, although "proximal" and "distal" are not intended to be limiting, but "proximal" generally refers to the end of the medical device that is closer to the physician during normal operation, and "distal" generally refers to the end that is first introduced into the patient. Furthermore, the term "or" in the above embodiments is generally used in the sense of comprising "and/or" unless otherwise explicitly indicated. In the above embodiments, "both ends" refer to the proximal end and the distal end.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.

Claims

1. A hemostatic clamp is characterized by comprising a first clamping piece, a second clamping piece, a tightening pipe, a middle clamping piece, a middle shaft assembly, a traction assembly, a control handle and at least two separators;

the control handle, the traction assembly, the middle shaft assembly and the tightening pipe are sequentially connected from a near end to a far end, wherein the control handle is connected with the near end of the traction assembly, the far end of the traction assembly is connected with the near end of the middle shaft assembly, and the far end of the middle shaft assembly is connected with the tightening pipe;

the proximal ends of the first clamping piece and the second clamping piece are arranged in the tightening pipe, the proximal ends of the first clamping piece and the second clamping piece are connected with the traction assembly, the proximal end of the middle clamping piece penetrates through the tightening pipe and is fixedly connected with the middle shaft assembly, the first clamping piece and the second clamping piece are arranged on two sides of the middle clamping piece, the first clamping piece and the middle clamping piece form a first clamp, and the second clamping piece and the middle clamping piece form a second clamp;

the control handle passes through traction assembly controls respectively first clamping piece with the second clamping piece is in reciprocating motion in the tightening pipe, so that the distal end of first clamping piece and/or the second clamping piece is close to or keeps away from middle clamping piece, thereby makes first clip and/or the second clip opens or closes, the separator sets up in tightening pipe's the lumen, and be located first clamping piece with middle clamping piece, the second clamping piece with between the middle clamping piece.

2. The hemostatic clip of claim 1, wherein the cinch tube and the separator are integrally formed.

3. The hemostatic clip of claim 1, wherein the cinch tube and the separator are formed by welding.

4. The hemostatic clip of claim 1, wherein the number of separators is two, and wherein two of the separators are plate-shaped.

5. The hemostatic clip of claim 4, wherein the spacing between two of the separators is in the range of 0.1-0.8 mm.

6. The hemostatic clip of claim 4, wherein the spacing between two of the separators is 0.2 mm.

7. The hemostatic clip of claim 4, wherein the cinch tube and the two separators are fold welded from at least two pieces of sheet metal.

8. The hemostatic clamp of claim 1, wherein the cinch tube defines a retaining groove that is configured to cooperate with the proximal ends of the first and second jaws to limit proximal movement of the first and second jaws relative to the cinch tube.

9. The hemostatic clamp according to claim 1, wherein a limiting protrusion is disposed on a surface of the first clamping piece and the second clamping piece away from the tube wall of the tightening tube, a blocking piece is disposed on a distal end surface of the tightening tube and is engaged with the limiting protrusion, and the blocking piece is engaged with the limiting protrusion to limit the first clamping piece and the second clamping piece from moving toward the proximal end of the tightening tube.

10. The hemostatic clamp according to claim 1, wherein the middle shaft assembly comprises a sheath front end tube, a connecting member and a pull ring, the proximal end of the sheath front end tube is connected to the traction assembly, the distal end of the sheath front end tube is detachably connected to the tightening tube via the connecting member, the traction assembly is configured to drive the pull ring to move distally, the pull ring separates the connecting member from the tightening tube and the sheath front end tube during the distal movement, and the proximal end of the middle clamping piece is disposed in the lumen of the sheath front end tube and is fixedly connected to the lumen of the sheath front end tube.

11. The hemostatic clip of claim 10, wherein the connector is an elastic member that, when released, connects the cinch tube and the sheath tip tube; when the elastic piece is pressed, the connecting piece is separated from the tightening pipe and the sheath pipe front end pipe.

12. The hemostatic clamp according to claim 10, wherein the traction assembly comprises a sheath, two core wires, two hooks and two connecting pins, the sheath is connected to the control handle at a proximal end thereof, the sheath is fixedly connected to the bottom bracket assembly at a distal end thereof, the two core wires are disposed in a lumen of the sheath, the core wires are connected to the control handle at a proximal end thereof, the core wires are fixedly connected to the hooks at a distal end thereof, the two hooks are respectively connected to the first clip and the second clip via the connecting pins, and the control handle is configured to pull the first clip and the second clip to reciprocate within the tightening tube via the two core wires.

13. The hemostatic clip of claim 12, wherein the sheath comprises a first proximal sheath, a second proximal sheath, a distal sheath and a connecting tube, wherein the connecting tube has a proximal end fixedly connected to the distal ends of the first proximal sheath and the second proximal sheath, respectively, a distal end fixedly connected to the proximal end of the distal sheath, a distal end fixedly connected to the sheath front tube, and a proximal end fixedly connected to one of the control handles, respectively, and wherein the two core wires pass through the distal sheath and the connecting tube, then pass through the first proximal sheath and the second proximal sheath, respectively, and are connected to the control handle.

14. An accessory system comprising an endoscope and a hemostatic clip according to any one of claims 1 to 13;

the endoscope is provided with an endoscope channel, the hemostatic clamp is arranged in the endoscope channel, and the endoscope channel is used for conveying and drawing the hemostatic clamp.