CN116019513A

CN116019513A - Suture device

Info

Publication number: CN116019513A
Application number: CN202211686972.1A
Authority: CN
Inventors: 吕文奇; 李晓晓; 吕著海; 徐延峰; 余光明
Original assignee: Nanwei Xinuo Medical Technology Nanjing Co ltd
Current assignee: Nanwei Xinuo Medical Technology Nanjing Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-04-28
Anticipated expiration: 2042-12-27
Also published as: CN116019513B

Abstract

The invention provides a suture instrument, which relates to the technical field of medical appliances, and comprises: the first inserting part and the second inserting part are arranged at intervals; along the far and near directions, a plurality of spiral grooves are formed in the inner walls of the first insertion part and the second insertion part, and the spiral grooves in the first insertion part and the second insertion part are communicated into a spiral channel along the same spiral line; one end is provided with a first connecting structure, and the other end is provided with a suture line of a slipknot; the first connecting structure is positioned in one spiral groove of the first insertion part; the slipknot is connected with the first insertion part, and a line hole of the slipknot is positioned at one side of a needle inlet port of one spiral groove at the rear side of the spiral groove fixed with the first connecting structure; a spiral needle rotatably connected to the spiral passage; the spiral needle is provided with a second connecting structure which can be connected with the first connecting structure.

Description

Suture device

Technical Field

The invention relates to the technical field of medical instruments, in particular to a stitching instrument.

Background

Generally, surgical operations require suturing of a surgical wound, and conventional wound suturing involves suturing with a surgeon's hand or tool. With the continuous development and application of minimally invasive techniques such as endoscopic techniques in surgical procedures, surgical wounds are becoming smaller and deeper, which places higher demands on the suturing operation. In addition, some special wounds, such as bullet wounds, have similar characteristics, and the wounds are small, deep, irregular and not easy to stitch.

The traditional manual suture has a plurality of inconveniences on the minimally invasive wound, the suture operation is limited by space, the operation is inconvenient for bare-handed suture or needle forceps suture, partial places cannot be deep, the suture is not firm or the suture is not in place, the operation effect is affected, and the postoperative rehabilitation is not facilitated. And the place with smaller space is easy to cause secondary injury due to the false collision of the instrument. As in laparoscopy, conventional needle and line suturing requires the passage of a needle through tissue, which can lead to the needle being poked through the viscera causing significant medical problems. Also, for example, gun-bullet wounds on battlefields, often these wounds are too deep to stitch the surface wound, the internal recovery effect is poor, even the infection due to the existence of cavities in the wound requires amputation, or the wound is cut and enlarged during the shrapnel extraction, which increases the injury to the patient.

Disclosure of Invention

The invention aims to provide a stitching instrument which is used for relieving the technical problem that the surface of a wound can only be stitched and the interior of the wound can not be stitched in the prior art.

An embodiment of the present invention provides a suture device, including:

the first inserting part and the second inserting part are arranged at intervals; along the far and near directions, a plurality of spiral grooves are formed in the inner walls of the first insertion part and the second insertion part, and the spiral grooves in the first insertion part and the second insertion part are communicated into a spiral channel along the same spiral line;

one end is provided with a first connecting structure, and the other end is provided with a suture line of a slipknot; the first connecting structure is positioned in one spiral groove of the first insertion part; the slipknot is connected with the first insertion part, and a line hole of the slipknot is positioned at one side of a needle inlet port of one spiral groove at the rear side of the spiral groove fixed with the first connecting structure;

a spiral needle rotatably connected to the spiral passage; the spiral needle is provided with a second connecting structure which can be connected with the first connecting structure.

In one embodiment, the method further comprises:

a handle, the proximal ends of the first and second insertion portions being connected to the distal end of the handle;

the driving mechanism is arranged on the handle and connected with the proximal end of the spiral needle, and the driving mechanism is used for driving the spiral needle to move spirally along the spiral channel.

In one embodiment, the drive mechanism includes:

the limiting part is arranged at the proximal end of the spiral needle, and a limiting hole penetrating through the distal end face and the proximal end face of the limiting part is formed in the limiting part;

the knob, the distal end of knob is provided with the gag lever post that extends distally, the gag lever post with the spacing hole grafting, just spacing portion with the gag lever post is static relatively in the circumference, just spacing portion can for the gag lever post is slided in the axial.

In one embodiment, the handle comprises:

a first half-shell and a second half-shell which are detachable; the first insertion part is connected with the first half shell, and the second insertion part is connected with the second half shell.

In one embodiment, the end face of the distal end of the knob is provided with a concave hole which is concave towards one side of the end face of the proximal end, and the limit rod is connected to the middle position of the bottom surface of the concave hole; an annular gap is formed between the limiting rod and the side wall of the concave hole;

the proximal end of the handle is positioned within the annular gap.

In one embodiment, the handle has an interior with a mounting hole extending in a front-to-back direction and extending through the distal and proximal ends of the handle;

the limiting part is positioned in the assembly hole;

the inner wall of the assembly hole is provided with a stop structure positioned on the movement path of the limiting part, and the stop structure is used for stopping the limiting part so as to prevent the limiting part from being completely separated from the distal end opening of the assembly hole.

In one embodiment, the first and second connection structures are sleeved, pinned or magnetically connected.

In one embodiment, the first connection structure comprises: an elastic collar; a limit structure is arranged in the spiral groove provided with the elastic lantern ring, and the limit structure is positioned between the elastic lantern ring and the needle outlet port of the spiral groove so as to prevent the elastic lantern ring from moving to one side of the needle outlet port of the spiral groove;

the second connection structure includes an annular groove provided on the spiral needle, the spiral needle being capable of passing through the elastic collar and cinching the elastic collar within the annular groove.

In one embodiment, the side of the needle inlet port of the spiral groove connected with the first connecting structure is provided with a limit groove, and the suture thread led out from the spiral groove passes through the limit groove.

In one embodiment, the slip knot is connected to the first insert part by means of glue.

The embodiment of the invention provides a stitching instrument, which comprises: the first inserting part and the second inserting part are arranged at intervals; along the far and near directions, a plurality of spiral grooves are formed in the inner walls of the first insertion part and the second insertion part, and the spiral grooves in the first insertion part and the second insertion part are communicated into a spiral channel along the same spiral line; one end is provided with a first connecting structure, and the other end is provided with a suture line of a slipknot; the first connecting structure is positioned in one spiral groove of the first insertion part; the slipknot is connected with the first insertion part, and a line hole of the slipknot is positioned at one side of a needle inlet port of one spiral groove at the rear side of the spiral groove fixed with the first connecting structure; a spiral needle rotatably connected to the spiral passage; the spiral needle is provided with a second connecting structure which can be connected with the first connecting structure. The specific operation process is as follows: inserting the distal ends of the first insertion portion and the second insertion portion into the wound, penetrating into the bottom; pressing the muscles on both sides of the wound inwards from the gap between the first insertion part and the second insertion part, and embedding the muscle tissue into the suture instrument insertion position; at this time, the spiral needle starts to rotate, and is guided by the spiral channel to rotate and move and gradually spiral towards the deep of the wound until the needle head of the spiral needle penetrates into the skin and enters the muscle tissue. Continuing to rotate, the spiral needle can penetrate into muscle tissue in a spiral way and interweave two side muscles together through the spiral; when the spiral needle enters the end of the stitching instrument, the needle head of the spiral needle firstly passes through the thread hole of the slipknot and then enters the next spiral groove, and the second connecting structure is connected with the first connecting structure. At the moment, reversely rotating the spiral needle to start withdrawing the spiral needle, and withdrawing the first connecting structure and the suture thread together with the rotation of the spiral needle; after the first connection structure is withdrawn to the slip knot, the suture forms a closed loop at the bottom of the wound, locking in the underlying muscle, at which time the spiral needle continues to rotate until the needle tip exits the skin surface, the first connection structure and suture are also carried over the skin surface, and spiral sutures are also formed inside the muscle.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a stapler provided in accordance with an embodiment of the present invention;

FIG. 2 is a schematic view of a spiral needle of a stapler provided in accordance with an embodiment of the present invention;

FIG. 3 is a schematic view of a knob of a stapler according to an embodiment of the present invention;

FIG. 4 is a schematic view of a suture instrument according to an embodiment of the present invention assembled with a knob;

FIG. 5 is an exploded view of the handle of the stapler provided by an embodiment of the present invention;

FIG. 6 is a schematic view of a handle of a stapler provided in accordance with an embodiment of the present invention;

FIG. 7 is a schematic view of the movement of a spiral needle of a stapler provided in accordance with an embodiment of the present invention;

FIG. 8 is a schematic view of a suture thread of a stapler provided in accordance with an embodiment of the present invention;

FIG. 9 is a partial schematic view of a stapler provided in accordance with an embodiment of the present invention at a first insertion portion and a second insertion portion position;

FIG. 10 is a schematic view of a stapler provided in an embodiment of the present invention prior to use;

FIG. 11 is a schematic view of step 1 of the stapler according to an embodiment of the present invention;

FIG. 12 is a schematic view of step 2 of the stapler according to an embodiment of the present invention;

FIG. 13 is a schematic view of step 3 of the stapler according to an embodiment of the present invention;

FIG. 14 is a schematic view of step 4 of the stapler according to an embodiment of the present invention;

FIG. 15 is a schematic view of step 5 of the stapler according to an embodiment of the present invention.

Icon: 110-a first insert; 111-limit grooves; 120-a second insertion portion; 130-helical grooves; 200-suture; 210-an elastic collar; 220-slipknots; 230-wire wheel;

310-spiral needle; 311-annular groove; 320-limit part; 321-limiting holes;

400-wound;

510-a first half-shell; 520-second half-shell; 530-a stop structure;

610-a knob; 611-a limit rod; 612-annular gap.

Detailed Description

The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The stapler provided by the embodiment of the invention can stitch the deeper wound 400 inside.

As shown in fig. 1 to 9, the stapler includes: the first insertion portion 110 and the second insertion portion 120 are disposed at a distance. The first insertion portion 110 and the second insertion portion 120 may each have an arc-shaped sheet structure having a length greater than a width, and concave surfaces of the first insertion portion 110 and the second insertion portion 120 are opposite to each other.

As shown in fig. 5, a plurality of spiral grooves 130 are formed on the inner walls of the first insertion portion 110 and the second insertion portion 120 along the distal-proximal direction, the spiral grooves 130 are through grooves, i.e. both ends are open, the spiral grooves 130 are located on the same spiral line, and the spiral grooves 130 on the first insertion portion 110 and the second insertion portion 120 are communicated into a spiral channel along the spiral line.

As shown in FIG. 8, the stapler further includes a suture 200 having a first attachment structure at one end and a slip knot 220 at the other end. The first connection structure may be located within a first helical groove 130 of the first insertion portion 110 near the distal end. The slip knot 220 may be connected to the first insertion portion 110 by medical glue. And the thread hole of the slipknot 220 may be located at the needle insertion port side of the second spiral groove 130 near the distal end, and the opening area of the thread hole is larger than the needle insertion port area of the spiral groove 130, so that the spiral needle 310 may be inserted into the spiral groove 130 after passing through the thread hole.

As shown in FIG. 7, the stapler further includes a spiral needle 310 rotatably coupled to the spiral path, which is not a complete structure, and which is broken at the interval between the first insertion portion 110 and the second insertion portion 120, but the extension path of each of the spiral grooves 130 is on one spiral line. The spiral needle 310 advances or retreats along the spiral path, and when the tip of the spiral needle 310 passes through the gap between the first insertion part 110 and the second insertion part 120, the tip may pass through the muscle tissue trapped in the gap.

The spiral needle 310 is provided with a second connection structure capable of being connected with the first connection structure. The second connection structure may be coupled to the first connection structure at a position where the second connection structure on the spiral needle 310 is advanced, and the first connection structure may move along with the spiral needle 310 after the first connection structure and the second connection structure are coupled together when the first connection structure and the second connection structure are coupled.

As shown in fig. 10-15, the specific operation of the stapler is as follows:

step 1, after the wound 400 is cleaned, inserting the distal ends of the first insertion part 110 and the second insertion part 120 into the wound and penetrating into the bottom; pressing muscles on both sides of the wound 400 inward from a gap position between the first insertion part 110 and the second insertion part 120, embedding muscle tissue between the first insertion part 110 and the second insertion part 120;

step 2, starting to rotate the spiral needle 310, and under the guidance of the spiral channel, performing rotational movement on the spiral needle 310 and gradually proceeding spirally towards the deep part of the wound 400 until the needle head of the spiral needle 310 penetrates into the skin and enters into muscle tissue.

Step 3, continuing to rotate, wherein the spiral needle 310 can penetrate into muscle tissue in a spiral manner and interweave two side muscles together through the spiral;

step 4, when the spiral needle 310 enters the end of the suture instrument, the needle head of the spiral needle 310 passes through the thread hole of the slipknot 220;

step 5. Continuing to rotate, the spiral needle 310 enters the next spiral groove 130, and the second connection structure is connected with the first connection structure.

Step 6, reversely rotating the spiral needle 310 to withdraw the spiral needle 310, wherein the first connecting structure and the suture 200 are withdrawn together with the rotation of the spiral needle 310; after the first connection structure is withdrawn to the slip knot 220, the suture 200 forms a closed loop knot at the bottom of the wound 400, locking in the bottom muscle, at which time the spiral needle 310 continues to rotate until the needle tip exits the skin surface, the first connection structure and suture 200 is also carried over the skin surface, and a spiral suture is also formed inside the muscle.

In one embodiment, the stapler further comprises: a handle, the proximal ends of the first and

second insertion parts

110 and 120 being connected to the distal end of the handle; a driving mechanism disposed on the handle and connected to the proximal end of the spiral needle 310, the driving mechanism being used to drive the spiral needle 310 to move spirally along the spiral channel.

In this embodiment, the handle is positioned outside the body during surgery, and the user can conveniently insert the first insertion portion 110 and the second insertion portion 120 into the wound 400 by grasping the handle. The driving mechanism on the handle can drive the spiral needle 310 to perform forward or reverse spiral movement, and the driving mode of the driving mechanism can be a manual driving mode or an electric driving mode.

In one embodiment, the drive mechanism includes: a limiting part 320 arranged at the proximal end of the spiral needle 310, wherein a limiting hole 321 penetrating through the distal end surface and the proximal end surface of the limiting part 320 is arranged on the limiting part; the knob 610, the distal end of the knob 610 is provided with a stop rod 611 extending distally, the stop rod 611 is inserted into the stop hole 321, the stop portion 320 and the stop rod 611 are relatively stationary in the circumferential direction, and the stop portion 320 is capable of sliding in the axial direction relative to the stop rod 611.

As shown in fig. 2-4, in this embodiment, the helical needle 310 may be manually driven to rotate. The stop rod 611 at the distal end of the knob 610 is inserted into the stop hole 321 of the stop portion 320, wherein the cross section of the stop rod 611 is matched with the cross section of the stop hole 321, and the stop hole 321 may have a non-circular hole structure, for example, a rectangular shape, a triangular shape, a cross shape, or the like. The limit rod 611 may drive the limit part 320 to rotate, and as the spiral needle 310 moves spirally in the spiral channel, the limit part 320 may move in a far and near direction with respect to the limit rod 611, so that the forward and backward movement of the spiral needle 310 may be achieved by rotating the knob 610.

In one embodiment, the handle comprises: a first half-shell 510 and a second half-shell 520 that are detachable; the first insertion portion 110 is connected to the first half shell 510, and the second insertion portion 120 is connected to the second half shell 520.

In this embodiment, the handle may be removed and the helical needle 310 may be removed from the distal opening of the mounting hole, as shown in fig. 5. After suture 200 has helically sutured the muscle, knob 610 and helical needle 310 may be removed, and first half shell 510 and second half shell 520 may then be separated and removed from wound 400 in sequence; the suture thread 200 is cut from the first connection structure, the suture portion is tightened by pulling, and the thread head is knotted and fixed after tightening, so that the suture operation is completed.

In other embodiments, the handle may be a unitary, tubular structure.

In one embodiment, the end face of the distal end of the knob 610 has a concave hole recessed toward one side of the end face of the proximal end, and the stop lever is connected to the middle position of the bottom surface of the concave hole; an annular gap 612 is formed between the limit rod and the side wall of the concave hole; the proximal end of the handle is located within the annular gap 612.

As shown in fig. 7, in this embodiment, the spiral needle 310 is advanced by rotating the knob 610 both before and during penetration of the spiral needle 310 into muscle tissue, and in this process, the first half-shell 510 and the second half-shell 520 of the handle are both in the annular gap 612, and the annular gap 612 acts as a stop for the first half-shell 510 and the second half-shell 520, thereby preventing the first half-shell 510 and the second half-shell 520 from moving in opposite directions and avoiding separation.

In one embodiment, the handle has an interior with a mounting hole extending in a front-to-back direction and extending through the distal and proximal ends of the handle; the limiting part 320 is positioned in the assembly hole; the inner wall of the assembly hole is provided with a stop structure 530 located on the movement path of the limiting portion 320, and the stop structure 530 is used for stopping the limiting portion 320, so as to prevent the limiting portion 320 from completely falling out of the distal end opening of the assembly hole.

In this embodiment, as shown in fig. 5, by providing the stopper 530 on the inner wall of the assembly hole, when the spiral needle 310 is rotated distally to the limit position (and then is pulled out of the handle in the forward direction), it is prevented from continuing to move forward by abutting against the stopper 530. Specifically, in this embodiment, the stop structure 530 may be a narrow portion formed by recessing inward on the handle housing, where the diameter of the narrow portion is smaller than the diameter of the other positions of the assembly hole, so as to form a step to stop the limiting portion 320.

In this embodiment, the first connection structure includes: an elastic collar 210; a limit structure is disposed in the spiral groove 130 provided with the elastic collar 210, and the limit structure is located between the elastic collar 210 and the needle outlet of the spiral groove 130, so as to prevent the elastic collar 210 from moving to the needle outlet of the spiral groove 130; the second connection structure includes an annular groove 311 provided on the screw needle 310, the length of the annular groove 311 is equal to or greater than the length of the elastic collar 210, and the screw needle 310 can pass through the elastic collar 210 and tighten the elastic collar 210 in the annular groove 311.

As shown in fig. 9, specifically, the elastic collar 210 is made of an elastic material, and has a variable inner diameter when an external force is applied. When the spiral needle 310 enters the elastic collar 210, the elastic collar 210 cannot move backwards under the blocking of the limiting structure, the spiral needle 310 is inserted continuously, the elastic collar 210 is gradually expanded, when the annular groove 311 on the spiral needle 310 moves to be aligned with the elastic collar 210, the elastic collar 210 can be wrapped in the annular groove 311, and at the moment, after the spiral needle 310 is reversely rotated, the spiral needle 310 can drive the elastic collar 210 to move backwards together. In this embodiment, the limiting structure may be annular, and the annular limiting structure is stopped at one end of the elastic collar 210 and is coaxially disposed, so that the tip of the spiral needle 310 can pass through the limiting structure again after passing through the elastic collar 210, thereby avoiding the limiting structure from interfering with the movement of the spiral needle 310.

In other embodiments, the first connection structure and the second connection structure may be magnetically connected, for example, the first connection structure may be a magnet, the second connection structure may be a portion of the spiral needle 310 made of ferromagnetic material, and the spiral needle 310 may be attracted together after contacting with the first connection structure. In addition to the above-described connection, the first connection structure and the second connection structure may also be pinned.

In one embodiment, the side of the insertion port of the spiral groove 130 to which the first connection structure is connected has a limit groove 111, and the suture thread 200 drawn from the inside of the spiral groove 130 passes through the limit groove 111.

As shown in fig. 9, in this embodiment, one end of the suture thread 200 connected to the first connecting structure may be led out of the spiral groove 130, then partially sunk into the limit groove 111, then extend in the proximal direction, and be connected to the reel 230 on the handle. By the holding and limiting action of the limiting groove 111 on the suture thread 200, friction between the suture thread 200 and muscle tissue during insertion of the first insertion portion 110 is avoided, and the elastic collar 210 is prevented from being separated from the spiral groove 130.

Embodiments are described below:

taking battlefield gun injury as an example, the specific implementation of the stitching instrument is described:

after debridement is completed, the suture instrument is inserted into the wound and goes deep to the bottom;

pressing the wound 400 muscle from both sides of the gap between the first insertion part 110 and the second insertion part 120 toward the center, embedding the muscle tissue into the insertion site of the stapler; at this point, the knob 610 is turned, and the helical needle 310 is rotated until the needle tip penetrates the skin into the muscle tissue. Continuing to rotate, the helical needle 310 will embed into the muscle tissue and interweave the two muscles together by the helix;

when the helical needle 310 enters the end of the stapler, the needle will first pass through the pre-set knot 220 and then enter the elastomeric collar 210 pre-set in the helical groove 130. When the elastic collar 210 is inserted into the annular groove 311 of the screw needle 310, the elastic collar 210 is coupled with the annular groove 311. At this point, the knob 610 is rotated in reverse to begin withdrawing the helical needle 310, and the elastic collar 210 and suture 200 are withdrawn together with the rotation of the helical needle 310;

after elastic collar 210 is withdrawn to slipknot 220, suture 200 forms a closed loop at the bottom of wound 400, locking in the bottom muscle, at which time knob 610 continues to be rotated until the needle is withdrawn from the skin surface, elastic collar 210 and suture 200 are also carried over to the skin surface, and a spiral suture is also formed inside the muscle;

the knob 610 and the screw 310 assembly are removed, and the left and right housings are again separated at this time, and can be sequentially removed from the wound 400; suture thread 200 is cut from elastic loop 210, the suture site is tightened by pulling, and the knot is tied and fixed to the thread after tightening, so that the suturing operation is completed.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. A stapler, comprising:

a first insertion section (110) and a second insertion section (120) that are provided at intervals; along the far and near directions, a plurality of spiral grooves (130) are formed in the inner walls of the first insertion part (110) and the second insertion part (120), and the spiral grooves (130) in the first insertion part (110) and the second insertion part (120) are communicated into a spiral channel along the same spiral line;

a suture (200) having a first connecting structure at one end and a slip knot (220) at the other end; the first connection structure is located within one helical groove (130) of the first insertion portion (110); the slipknot (220) is connected with the first insertion part (110), and a line hole of the slipknot (220) is positioned at one side of a needle inlet port of one spiral groove (130) at the rear side of the spiral groove (130) fixed with the first connecting structure;

a spiral needle (310) rotatably connected to the spiral channel; the spiral needle (310) is provided with a second connection structure capable of being connected with the first connection structure.

2. The stapler of claim 1, further comprising:

a handle, the proximal ends of the first insertion portion (110) and the second insertion portion (120) being connected to the distal end of the handle;

and the driving mechanism is arranged on the handle and connected with the proximal end of the spiral needle (310) and is used for driving the spiral needle (310) to move spirally along the spiral channel.

3. The stapler of claim 2, wherein the drive mechanism comprises:

a limiting part (320) arranged at the proximal end of the spiral needle (310), wherein a limiting hole (321) penetrating through the distal end surface and the proximal end surface of the limiting part (320) is arranged on the limiting part;

the knob (610), the distal end of knob (610) is provided with spacing pole (611) that extends distally, spacing pole (611) with spacing hole (321) grafting, just spacing portion (320) with spacing pole (611) is static relatively in the circumference, just spacing portion (320) can be with spacing pole (611) is axial direction slip.

4. The stapler of claim 3, wherein the handle comprises:

a first half-shell (510) and a second half-shell (520) that are detachable; the first insertion portion (110) is connected to the first half-shell (510), and the second insertion portion (120) is connected to the second half-shell (520).

5. The stapler according to claim 4, wherein a distal end surface of the knob (610) has a concave hole recessed toward a proximal end surface side, and the stopper rod is connected to a bottom surface intermediate position of the concave hole; an annular gap (612) is formed between the limit rod and the side wall of the concave hole;

the proximal end of the handle is located within the annular gap (612).

6. The stapler of claim 3, wherein the handle has a mounting hole therein extending in a front-to-back direction and passing through the distal and proximal ends of the handle;

the limiting part (320) is positioned in the assembly hole;

the inner wall of the assembly hole is provided with a stop structure (530) positioned on the movement path of the limit part (320), and the stop structure (530) is used for stopping the limit part (320) so as to prevent the limit part (320) from completely falling out of the distal end opening of the assembly hole.

7. The stapler of claim 1, wherein the first and second connection structures are sleeved, pinned, or magnetically connected.

8. The stapler of claim 7, wherein the first connection structure comprises: an elastic collar (210); a limit structure is arranged in the spiral groove (130) provided with the elastic sleeve ring (210), and the limit structure is positioned between the elastic sleeve ring (210) and the needle outlet port of the spiral groove (130) so as to prevent the elastic sleeve ring (210) from moving to the needle outlet port side of the spiral groove (130);

the second connection structure comprises an annular groove (311) arranged on the spiral needle (310), and the spiral needle (310) can penetrate through the elastic sleeve ring (210) and enable the elastic sleeve ring (210) to be clamped in the annular groove (311).

9. The suture device according to claim 8, wherein a side of the needle insertion port of the spiral groove (130) to which the first connection structure is connected has a limit groove (111), and a suture thread (200) drawn from inside the spiral groove (130) passes through the limit groove (111).

10. The stapler according to claim 8, wherein said slip knot (220) is connected to said first insertion portion (110) by means of an adhesive.