CN217338676U - Suturing device - Google Patents

Abstract

The utility model discloses a suturing device, belonging to the technical field of medical instruments, comprising at least two band wire clamps and a locking device, wherein, the band wire clamps comprise a clamp body and a suture line, and the suture line is connected on the clamp body; the locking device pulls and locks each suture line, so that the clamp bodies are mutually closed and locked. The suturing device is suitable for realizing the tension reduction and the closure of various wound surfaces, in particular to the suturing of larger wound surfaces, thereby being beneficial to safely and efficiently closing the wound surfaces and the defects of the digestive tract under an endoscope. And this suturing device sets up the stylolite of taking the line clip respectively through around the surface of a wound, utilizes locking device tractive and locks the stylolite of each stylolite of taking the line clip, draws through the stylolite and makes each clip body draw close each other and lock, drives the surface of a wound closure, can realize the tension reduction and the closure to the surface of a wound, easy operation can avoid surgery operation in the at utmost, therefore is favorable to popularizing and applying.

Description

Suturing device

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to suturing device.

Background

Mucosal dissection (ESD) under endoscope is increasingly popular, one of the main complications of ESD and its derivative technology is perforation of the digestive tract and fistula of the digestive tract, and the main ways to solve such digestive tract problems under endoscope currently are: metal clips under the endoscope are clamped, nylon ropes under the endoscope are sutured, and the surgical operation is repaired. However, the above method has many disadvantages, mainly: (1) the metal clip is suitable for smaller perforation under the endoscope, and the titanium clip with larger perforation is difficult to clip and is often required to be matched with a nylon rope for sewing; (2) the currently used nylon rope is of an annular structure, and is not easy to fix around the wound when the wound is sutured under an endoscope; (3) surgical repair is a large trauma and costly procedure that is not the preferred method.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model provides a suturing device aims at solving the technical problem that prior art is difficult for sewing up to great surface of a wound.

The technical scheme is as follows: in order to realize the above purpose of the utility model, the utility model provides a pair of sewing device, include:

at least two strip line clips;

the suture clip comprises a clip body and a suture connected to the clip body;

the suture line comprises a connecting end and a traction end, and the connecting end is connected to the clamp body; the traction end draws close to drive the clamp body to draw close.

In some embodiments, the clip body includes a holder and a clip connected to the holder, the suture being connected to the clip.

In some embodiments, the suture device further comprises a releasing device, and the releasing device is used for feeding and releasing the tape clamp from the forceps channel so as to clamp the tape clamp around the wound surface.

In some embodiments, the suture is attached to the clip body by welding or knotting.

In some embodiments, the suturing device further comprises a locking device by which the trailing end is pulled locked, the locking device comprising:

and the locking element comprises a first locking block and a second locking block, and a locking area for penetrating and locking the suture is formed between the first locking block and the second locking block.

In some embodiments, the locking device comprises:

a handle assembly including a suture passage for passing through the suture, the suture passage including a cutting portion for cutting the suture, a distal end of the handle assembly detachably coupled to the first lock block;

the proximal end of the pull rope is connected with the control assembly, and the distal end of the pull rope is detachably connected with the second locking block;

the pull rope is controlled by the control assembly, the second locking block is pulled to the first locking block to be locked, and then the pull rope is separated from the second locking block.

In some embodiments, the manipulation assembly comprises:

the control mechanism is connected to the near end of the pull rope and used for controlling the pull rope;

the catheter is arranged around the pull rope, and the proximal end of the catheter is connected with the control mechanism;

a support portion connected to the distal end of the catheter, the threading channel being formed on the support portion;

the first lock block is connected to a distal end of the support portion.

In some embodiments, the support portion comprises:

a base connected to a distal end of the catheter, the cutting portion being disposed on the base;

alternatively, the first and second electrodes may be,

the support portion includes:

a base connected to the distal end of the catheter, the base comprising a first shear element;

the sliding block is connected to the base and is pulled to slide towards the proximal direction along the base through the pull rope, and the sliding block comprises a second shearing unit;

the first cutting unit and the second cutting unit constitute the cutting section.

In some embodiments, the first lock block is connected to the base;

alternatively, the first and second electrodes may be,

the first lock block is connected with the sliding block and comprises a limiting portion, and the limiting portion is abutted against the base and used for realizing separation of the first lock block and the sliding block when the sliding block slides towards the near end direction.

In some embodiments, the slider includes a through hole through which the pull cord passes; and when the blocking part abuts against the sliding block, the sliding block is pulled by the pull rope to slide towards the near end direction.

In some embodiments, the second lock block includes a connection portion, the pull rope is connected to the connection portion, and the pull rope and the second lock block are separated by deformation of the connection portion.

In some embodiments, the connecting portion is an elastic hole, the pulling rope is locked in the elastic hole, and the pulling rope and the second locking piece are separated through the expansion deformation of the elastic hole.

In some embodiments, the first locking piece is a sleeve, and the second locking piece is inserted into the first locking piece to lock the suture.

Has the advantages that: compared with the prior art, the utility model discloses a suturing device includes: at least two strip line clips; the suture clip comprises a clip body and a suture connected to the clip body; the suture line comprises a connecting end and a traction end, and the connecting end is connected to the clamp body; the traction end is closed to drive the clamp body to close. The suturing device is suitable for realizing the tension reduction and the closure of various wound surfaces, is particularly suitable for suturing larger wound surfaces, and can safely and efficiently solve various digestive tract problems under an endoscope. And this suturing device sets up the band wire clip respectively through around the surface of a wound, and the traction through two way at least stylolite makes each clip body draw close each other, drives the surface of a wound closure, can realize to the subtract of surface of a wound tension with closed, easy operation can avoid surgery operation in the at utmost, therefore is favorable to popularizing and applying.

Drawings

The technical solution and other advantages of the present invention will become apparent from the following detailed description of the embodiments of the present invention with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a suturing device according to an embodiment of the present invention;

FIG. 2 is a schematic view of the combination of the corded clamp and the release device according to an embodiment of the present invention;

fig. 3 is a schematic perspective view of a locking device in an embodiment of the present invention;

FIG. 4 is a side view of a distal portion of a locking device in an embodiment of the invention;

fig. 5 is a schematic structural view of a first locking block of the locking device in the embodiment of the present invention;

fig. 6 is a schematic structural view of a second locking block of the locking device in the embodiment of the present invention;

fig. 7 is a schematic structural diagram of the locking device according to the embodiment of the present invention when the pull rope pulls the first locking piece to the second locking piece for locking;

FIG. 8 is a schematic cross-sectional view of a locking device of an embodiment of the present invention shown in cross-section when a suture is passed through but not locked;

FIG. 9 is a schematic cross-sectional view of a locking device of an embodiment of the present invention as it passes through and locks a suture;

fig. 10 is a schematic cross-sectional view of the locking device of the embodiment of the present invention when the pulling rope is separated from the second locking piece and the sliding block is pulled to slide;

fig. 11 is a schematic cross-sectional view of the operating assembly of the locking device of the embodiment of the present invention when separated from the first lock block;

fig. 12 is a schematic sectional view of a supporting portion of a locking device according to an embodiment of the present invention;

FIG. 13 is a schematic cross-sectional view of a distal portion of a locking device in accordance with further embodiments of the present invention;

reference numerals are as follows: 1-a strip line clamp; 2-a clip body; 3-a suture; 4-a locking device; 5-a clamping seat; 6-clamping piece; 7-a release device; 8-a locking element; 9-a first locking piece; 10-a second locking piece; 11-a steering assembly; 12-a shearing section; 13-pulling a rope; 14-a steering mechanism; 15-a catheter; 16-a support; 17-a base; 18-a first shearing unit; 19-a slide block; 20-a second shearing unit; 21-a limiting part; 22-through hole; 23-a barrier; 24-a connecting part.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be understood that the term "proximal end" refers to the end close to the operator, "distal end" refers to the end close to the wound surface, and the indicated orientations or positional relationships of the terms "center", "radial", "upper", "lower", "front", "rear", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Etc. the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any significant order among or between indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

The suturing device disclosed by the embodiment of the application is mainly applied to the relaxation and closure of various wound surfaces, fistula, perforation and the like in endoscopic surgery, and is particularly suitable for suturing larger wound surfaces. The suture device comprises at least two band wire clamps 1, wherein the band wire clamps 1 are respectively clamped around the wound surface in the suture process, and each band wire clamp 1 is pulled towards the middle to be gathered, so that the body around the wound surface is tightened towards the middle, and the tension and the closure of the wound surface are realized, thereby realizing the suture of the wound surface.

As shown in fig. 1, the dotted line part is shown as a wound surface, two band clamp 1 of the suture device are respectively clamped at two sides of the wound surface, and the two band clamp 1 are tensioned towards the middle, so that the wound surface can be opened and closed. It can be understood that the operator can select different numbers of the band wire clamps 1 according to the size of the wound surface, for a smaller wound surface, the band wire clamps 1 can be only arranged in two, and for a larger wound surface, a plurality of band wire clamps 1 can be arranged to surround the wound surface to improve the suture effect.

Specifically, the clip 1 includes a clip body 2 and a suture 3, and the suture 3 is attached to the clip body 2. In some embodiments, the clip body 2 can be directly selected from the existing disposable tissue clip, and the suture 3 is connected on the basis of the existing disposable tissue clip, so that the band wire clip 1 can be manufactured. The stylolite 3 chooses for use medical flexible material to make and forms, and the material can be metal or polymer, and the connected mode of stylolite 3 and clip body 2 can be for the mode of welding or knot, and the suitable connected mode that the skilled person in the art can select according to specific material links together both. Because the suture line 3 is relatively tiny compared with the clip body 2, and the material is relatively soft, the movement of the clip body 2 can not be interfered, and therefore, after the suture line 3 is connected, the clip body 2 can still smoothly pass through the endoscopic forceps channel, and the suture operation can be smoothly completed.

Referring again to fig. 1, the clip body 2 includes a holder 5 and a clip 6, the clip 6 is connected to the holder 5, and the suture 3 can be connected to either the holder 5 or the clip 6. Preferably, in some embodiments, the suture 3 is attached to the clip 6. When suturing, owing to need clip the surface of a wound surrounding organism through clamping piece 6, consequently compare in connecting stylolite 3 on holder 5, when stylolite 3 connects on clamping piece 6, its hookup location is closer to the surface of a wound, draws in two clips in, can make the wound approach closer, promotes sutural effect. Moreover, the suture line 3 is connected on the clamping piece 6, so that the root part of the suture line is closer to the wound surface, the clamp body 2 cannot be pulled down, and the suture safety is further ensured.

As shown in fig. 2, the suturing device further includes a releasing device 7, and the releasing device 7 is used for delivering and releasing the string clamp 1 from the forceps channel, so that the string clamp 1 is clamped around the wound surface. Generally, the existing tissue clamp release device in endoscopic surgery can be directly adopted to facilitate the operation of the operator. In the suturing process, the releasing device 7 sends the band-thread clamps 1 into the body through the forceps channel one by one, and pulls the handle backwards to release the band-thread clamps 1, so that the band-thread clamps 1 are clamped around the wound surface respectively, and the suture line 3 is kept in the forceps channel. The operator locks all the suture lines 3 reserved in the forceps channel, and cuts off the redundant suture lines 3, namely the wound surface is opened and closed.

In some embodiments, the interlinked crimping devices also include a locking device 4, and the locking device 4 locks the trailing end of the suture 3, it being understood that in the locked position, the trailing end of the suture 3 is in the locked position by the locking device 4.

The locking means 4 may employ means for tightening the wire known in the art, such as a rubber ring, a locking block, or the like. The application makes the operation of locking the suture line under the endoscope simpler and safer, and the locking effect is more stable and firmer, and the locking device 4 is specially designed. Referring to fig. 3-13 together, in some embodiments the locking device 4 comprises a locking element 8, and the locking element 8 mainly comprises two parts, namely a first locking piece 9 and a second locking piece 10. The suture 3 passes through the locking area between the first locking piece 9 and the second locking piece 10, and the suture 3 is locked and tightened through the combination of the two.

In some embodiments, locking device 4 further comprises a steering assembly 11 having a threading channel for passing suture 3, the threading channel having a cutting portion 12 for cutting suture 3. And the distal end of the steering assembly 11 is detachably connected to the first locking piece 9 for feeding the locking member 8 into the body to lock the suture 3 and then separating it therefrom. In some embodiments, steering assembly 11 includes steering mechanism 14, catheter 15, and support 16. The actuation mechanism 14 is used to actuate the action of the entire locking device 4, including advancing the distal end of the locking device 4 into the body through the jaw passage along the suture 3, locking the suture 3 by the locking element 8, severing the suture 3, and removing the remainder of the locking device 4 separately from the locking element 8. The guide tube 15 connects the actuating mechanism 14 to the support 16, which on the one hand serves as an extension guide and on the other hand also accommodates the pull cord 13 therein for protection. The holding portion 16 is connected to the distal end of the catheter 15, and the threading passage is formed in the holding portion 16, and functions mainly include three parts, one for smoothly feeding the locking member 8 into the body and maintaining a desired operation state, the other for cutting the unnecessary suture thread 3, and the other for separating from the locking member 8 after the locking of the suture thread 3 is completed.

Locking device 4 further comprises a pull cord 13, the function of pull cord 13 comprising at least the triggering of the locking action of locking element 8 to lock the tightening of suture 3. After the locking is completed, the pull cord 13 should also be detached from the locking element 8, leaving the locking element 8 in the body. Therefore, the proximal end of the locking device is connected with the control mechanism 14, so that the pulling control of the pull rope 13 can be carried out through the control mechanism 14, and the distal end of the locking device is detachably connected with the second locking block 10, so that the second locking block 10 can be pulled to the first locking block 9 to lock the suture 3, and the locking device is separated from the second locking block 10 after the locking.

In some embodiments, the first lock 9 is a sleeve as shown in fig. 5, and a stopper 21 is protruded from a distal end of the sleeve in a radial direction. The second locking piece 10 is a plunger as shown in fig. 6, matching the shape of the sleeve of the first locking piece 9, inserted into the sleeve to lock the suture 3. Both are made of medical materials, wherein the first locking piece 9 can be made of medical metal materials in an integrated mode, and the second locking piece 10 can be made of medical plastics, and due to certain elasticity, the connecting portion 24 arranged on the first locking piece and used for connecting the pull rope 13 can deform when being pulled and stressed, so that the pull rope 13 is separated from the second locking piece 10. Specifically, the connecting portion 24 is an elastic hole in which the pulling rope 13 can be locked.

In some embodiments, steering mechanism 14 may be implemented using the handle of an existing endoscopic surgical tissue clip release device to facilitate the surgical procedure performed by the operator.

In some embodiments, the conduit 15 may be a spring conduit as shown in fig. 13, which surrounds the pull cord 13 and may be covered with a protective film. In some embodiments, the conduit 15 may also be made of rubber, or other materials.

In some embodiments, the support portion 16 mainly comprises two portions, namely a base 17 and a slider 19, which are both made of a medical metal material. As shown in fig. 12, the base 17 is substantially cylindrical and is connected to the distal end of the catheter 15, and has a slot cut in its side wall to form a first shearing module 18. The slider 19 is a cylindrical structure having an outer wall abutting the inner wall of the base 17, and has a through hole 22 at the center thereof, the through hole 22 having a slightly larger diameter than that of the pull cord 13, and the pull cord 13 passing through the through hole 22. The distal end of the slider 19 is further provided with a receiving cavity communicated with the through hole 22, and a slot is also formed on the side wall of the receiving cavity to form a second cutting unit 20. The first shearing unit 18 and the second shearing unit 20 constitute the shearing portion 12, the edges of the two slots being staggered with respect to each other when the slider 19 slides proximally in the base 17, so as to shear the suture 3.

In some embodiments, pull cord 13 may be a 0.4mm cable having a ball at its distal end forming stop 23. From the far end to the near end, the pulling rope 13 sequentially passes through the elastic hole of the second locking block 10 and the first locking block 9, enters the base 17, passes through the accommodating cavity of the sliding block 19 and the through hole 22, and then passes through the conduit 15 to be connected with the control mechanism 14.

As shown in fig. 8, in the initial state of the locking device 4, the locking area between the first locking piece 9 and the second locking piece 10 should have a certain threading space, and at this time, the first locking piece 9 and the second locking piece 10 are separated, and the second locking piece 10 is kept linked with the rest of the locking device 4 through the pulling rope 13. The distal edges of the base 17 and the slider 19 are flush and the two slots are aligned with each other and form a threading channel together with the receiving cavity. The first lock 9 is inserted into the receiving cavity of the slide 19, the limiting part 21 of the first lock abuts against the edge of the base 17, and the outer diameter of the limiting part 21 is substantially the same as that of the base 17. The operator needs to thread the suture 3, which is reserved in the jaw path, through the locking area seam and out through the two slots of the threading channel. The distal end of the locking device 4 is then gradually inserted into the jaw path along the suture 3, to the vicinity of the wound bed, tightening the suture and bringing the locking element 8 towards the root of the suture 3.

As shown in fig. 9, the operator pulls the pulling rope 13 proximally by means of the operating mechanism 14, and the second locking piece 10 is then pulled into the first locking piece 9, and the suture 3 between the two is locked and tightened.

As shown in fig. 10, in the locked state, the pulling rope 13 is continuously pulled to the proximal end, the blocking portion 23 formed by the ball head applies a force pointing to the proximal end to the second lock piece 10, meanwhile, due to the existence of the limiting portion 21, the base 17 forms a counter-force frame to apply a reverse force, the elastic hole channel is deformed under the combined action of the two forces, the blocking portion 23 is disengaged from the elastic hole channel, the locking of the pulling rope 13 is released, and the pulling rope 13 is separated from the second lock piece 10. As the pulling rope 13 slides proximally, the blocking portion 23 abuts against the distal edge of the through hole 22 of the slider 19, so that the slider 19 is pulled by the pulling rope 13 to slide proximally along the base 17, and the first cutting unit 18 and the second cutting unit 20 alternately cut the excess suture thread 3.

As the slider 19 continues to move proximally, the first lock 9 also gradually disengages from the receiving cavity and becomes fully disengaged from the support 16, as shown in FIG. 11. At this point, the operating assembly 11 can be withdrawn, leaving the locking element 8 in the body.

Unlike the previous embodiments, in other embodiments, the first locking piece 9 is inserted into the base 17, and the inserted portion of the first locking piece is attached to the inner wall of the base 17. The slider 19 is only used to form the cutout 12 in cooperation with the base 17, and thus, with a modification based on the structure of fig. 8, the slider 19 should be provided shorter, shortened mainly by the receiving cavity for inserting the portion where the first lock piece 9 is provided in the above embodiment. The specific locking, cutting operation is substantially the same as in the previous embodiment.

In addition, in other embodiments, the support portion 16 eliminates the slider 19 and only the base 17 is provided. Base 17 is generally cylindrical and is attached to the distal end of catheter 15 and has a slot in its side wall with sharp cutting edges forming cutting portion 12, which forms a passage for suture 3 with the lumen of base 17. The pull rope 13 passes through the inner cavity of the base 17, passes through the first locking block 9 and then is connected with the second locking block 10. The first locking piece 9 is inserted into the base 17, the inserted portion of the first locking piece is attached to the inner wall of the base 17, the limiting portion 21 of the first locking piece abuts against the edge of the base 17, and the outer diameter of the limiting portion 21 is substantially the same as that of the base 17.

In this embodiment, the operator still operates the operating mechanism 14 to control the pulling cord 13 to be pulled proximally, pulling the second locking piece 10 into the first locking piece 9, and thereby achieving a locked tightening of the suture 3. At this point, the tensioning of the suture 3 is continued, and by withdrawing the operating assembly 11 of the locking device 4 towards the outside of the body, the seat 17 is sufficiently detached from the locking element 8 to leave it inside the body, while its cutting portion 12 can cut off the excess suture 3.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The sewing device provided by the embodiment of the present invention is described in detail above, wherein a specific example is applied to explain the principle and the implementation of the present invention, and the description of the above embodiment is only used to help understanding the technical solution and the core idea of the present invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present invention in its various embodiments.

Claims (12)

1. A suturing device, comprising:

at least two strip line clips (1);

the clip (1) with the wire comprises a clip body (2) and a suture (3) connected to the clip body (2);

the suture (3) comprises a connecting end and a traction end, and the connecting end is connected to the clamp body (2); the traction end draws together to drive the clamp body (2) to draw together.

2. A suturing device according to claim 1, wherein the clip body (2) comprises a holder (5) and a clip (6) connected to the holder (5), the suture (3) being connected to the clip (6).

3. The suturing device of claim 1, further comprising a release device (7), wherein the release device (7) feeds and releases the suture clip (1) from the jaw path to clamp the suture clip (1) around the wound surface.

4. Suturing device according to claim 1, characterized in that the suture (3) is attached to the clip body (2) by means of welding or knotting.

5. A suturing device according to claim 1, further comprising a locking device (4), wherein the trailing end is pull-locked by the locking device (4), the locking device (4) comprising:

a locking element (8) comprising a first locking piece (9) and a second locking piece (10), wherein a locking area for passing and locking the suture thread (3) is formed between the first locking piece (9) and the second locking piece (10).

6. A suturing device according to claim 5, characterized in that the locking device (4) comprises:

a manipulation assembly (11) comprising a threading channel for passing the suture thread (3), the threading channel comprising a cutting portion (12) for cutting the suture thread (3), a distal end of the manipulation assembly (11) being detachably connected to the first lock block (9);

a pull rope (13) with the proximal end connected with the control component (11) and the distal end detachably connected with the second locking block (10);

the pull rope (13) is controlled by the control assembly (11), the second locking block (10) is pulled to the first locking block (9) to be locked, and then the pull rope (13) is separated from the second locking block (10).

7. A suturing device according to claim 6, characterized in that the handling assembly (11) comprises:

a control mechanism (14) connected to the proximal end of the pull rope (13) for controlling the pull rope (13);

a catheter (15) arranged around the pull rope (13), the proximal end of the catheter being connected to the control mechanism (14);

a support portion (16) connected to the distal end of the catheter (15), the threading channel being formed on the support portion (16);

the first locking piece (9) is connected to the distal end of the support portion (16).

8. Suturing device according to claim 7, characterized in that said support (16) comprises:

a base (17) connected to the distal end of the catheter (15), the cutting portion (12) being disposed on the base (17);

alternatively, the first and second electrodes may be,

the support portion (16) includes:

a base (17) connected to the distal end of the catheter (15), the base (17) comprising a first shearing unit (18);

a slider (19) connected to the base (17) and sliding in a proximal direction along the base (17) by being pulled by the pull cord (13), the slider (19) including a second cutting unit (20);

the first shearing unit (18) and the second shearing unit (20) constitute the shearing section (12).

9. Suturing device according to claim 8, characterized in that the first locking block (9) is connected to the base (17);

alternatively, the first and second electrodes may be,

the first locking block (9) is connected with the sliding block (19), the first locking block (9) comprises a limiting part (21), the limiting part (21) abuts against the base (17) and is used for realizing separation of the first locking block (9) and the sliding block (19) when the sliding block (19) slides towards the near end direction.

10. The suturing device of claim 8, wherein the slider (19) comprises a through hole (22), the pull cord (13) passing through the through hole (22); the pull rope (13) is provided with a blocking part (23), and when the blocking part (23) abuts against the sliding block (19), the pull rope (13) pulls the sliding block (19) to slide towards the proximal direction.

11. Stitching device according to claim 6 or 10, characterized in that the second lock piece (10) comprises a connecting portion (24), the pull cord (13) being connected to the connecting portion (24), the detachment of the pull cord (13) from the second lock piece (10) being achieved by deformation of the connecting portion (24).

12. The suturing device of claim 11, wherein the connecting portion (24) is an elastic channel, and the pull string (13) is locked in the elastic channel, and the pull string (13) and the second lock piece (10) are separated by the expansion and deformation of the elastic channel.

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