Suturing device for endoscope

Abstract

The utility model relates to a suture device for an endoscope, belongs to the technical field of medical instruments, and solves the problem that a large wound surface is difficult to suture after a tumor resection operation. The suture device comprises a guide wire, an outer catheter, a pull wire, a spiral nail, a guide wire handle and a catheter handle. The guide wire is clamped with the screw nail to drive the screw nail to rotate; the guide wire handle is used for driving the guide wire to rotate; internal threads are arranged at the tail end of the outer catheter; a plurality of spiral nails are arranged in the outer catheter; the catheter handle is used for positioning the outer catheter; the spiral nail comprises an upper sleeve, a threaded connecting part, a clamping part and a screwing part. The threaded connecting part is screwed with the internal thread; a threading hole is formed in the threaded connecting part, and a pull wire penetrates into the threading hole to connect the multiple spiral nails in series; when the spiral nail rotates, the screwing part at the tail end of the spiral nail can be screwed into the tissue to be sutured. The sleeve guide wire rotates to drive the spiral nail to be driven in and released in a rotating mode, and the wound surface can be shrunk by tensioning the pull wire on the spiral nail.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a suture device for endoscopes. Background Art

[0002] After endoscopic resection of gastrointestinal tumors, huge wounds will appear, and clinical treatment is relatively difficult. Currently available clinical instruments and suture methods, such as metal clips, tissue glue, etc., are still very difficult for larger wounds and perforations (≥3 cm). The existing continuous suture device drives in multiple spiral nails around the wound, and the multiple spiral nails are connected by sutures. The way of tightening the multiple spiral nails is used to reduce the large wound, and then it is convenient to perform fine suture, providing a highly operable solution for the suture of large wounds.

[0003] However, the following problems are still difficult to solve in the existing related products of multi-nail suture:

[0004] 1. The spiral nails are for interrupted suture. After driving in one spiral nail, a new spiral nail needs to be installed, and the time cost is relatively high.

[0005] 2. Once the spiral nail is driven in, it cannot be rotated backward and taken out. If the driving position is improper, it will affect the overall suture effect.

[0006] 3. The release of the spiral nail can only rely on the dragging force, and free release cannot be completed. Moreover, there is a possibility of pulling out the spiral nail by the dragging force, and there is a risk of further causing tissue damage.

[0007] For the above reasons, it is necessary to develop a suture device for endoscopes. Content of the Utility Model

[0008] In view of the above analysis, the utility model aims to provide a suture device for endoscopes to solve the problems that the existing suture instruments are difficult to handle large wounds and the equipment operation is complex and difficult to promote and apply.

[0009] The purpose of the utility model is mainly achieved through the following technical solutions:

[0010] A suture device for endoscopes includes: a guide wire, an outer catheter, a pull wire, a spiral nail, a guide wire handle and a catheter handle;

[0011] The guide wire is arranged above the spiral nail, and a rotating boss is arranged at the end of the guide wire; the rotating boss can be engaged with the upper sleeve of the spiral nail, and when the guide wire rotates, the spiral nail can be driven to rotate; the guide wire handle is arranged at the upper end of the guide wire and is used to drive the guide wire to rotate;

[0012] The end of the outer catheter is provided with internal threads; a plurality of screw pins are arranged inside the outer catheter; the catheter handle is arranged above the outer catheter for positioning the outer catheter;

[0013] The screw pin includes: an upper sleeve, a threaded connection part, a clamping part and a screwing part; the clamping part and the screwing part of one screw pin can be sleeved into the upper sleeve of another screw pin; the threaded connection part can be screwed with the internal threads;

[0014] A wire threading hole is arranged on the threaded connection part, and the pulling wire penetrates into the wire threading hole to connect a plurality of screw pins in series; when the screw pin rotates, the screwing part at the end of the screw pin can be screwed into the tissue to be sutured.

[0015] Further, the inner cavity diameter of the outer catheter is equal to the outer diameter of the screw pin, and the screw pin can slide in the inner cavity of the outer catheter; an external thread is arranged on the outer surface of the threaded connection part, and the external thread can be screwed with the internal threads of the outer catheter.

[0016] Further, a sleeve inner cavity is arranged inside the upper sleeve, and a clamping groove is arranged on the side wall of the sleeve inner cavity.

[0017] Further, a rotating convex rib is arranged on the outer side of the rotating convex platform, and the rotating convex platform and the rotating convex rib can be respectively clamped into the sleeve inner cavity and the clamping groove.

[0018] Further, a plurality of clamping convex ribs are arranged on the outer side of the clamping part; the clamping part can be clamped into the sleeve inner cavity; the clamping convex ribs can be clamped with the clamping groove, so that two adjacent screw pins up and down are mutually engaged and rotate synchronously.

[0019] Further, the wire threading hole is arranged on the outer side of the upper sleeve.

[0020] Further, the wire threading hole is arranged at the center of the threaded connection part and penetrates through the clamping part.

[0021] Further, the screwing part is a spiral structure.

[0022] Further, the cross section of the screwing part is circular, elliptical, rectangular or triangular.

[0023] Further, the number of the screw pins is four, namely a first screw pin, a second screw pin, a third screw pin and a fourth screw pin.

[0024] The technical solution of the present utility model can at least achieve one of the following effects:

[0025] 1. The suture device for endoscope of the present utility model realizes the synchronous rotation of multiple spiral nails through the installation method of sequential nesting of multiple spiral nails. It can drive the synchronous rotation of multiple spiral nails through the engagement between the guide wire and the uppermost spiral nail. During the rotation of the spiral nails, they can gradually achieve the states of non-rotational connection, screwing in, and screwing out with the outer catheter. At the same time, the rotation of the spiral nails can screw the screwing part into the human tissue.

[0026] 2. The present utility model realizes screwing multiple spiral nails into the tissue to be sutured in sequence through the continuous rotation and release of multiple spiral nails, and realizes the contraction of the wound surface by tightening the pull wire, so that a large wound surface can be contracted into a small wound surface that can be sutured by a conventional method, which is convenient for subsequent suture operations.

[0027] 3. In the suture device for endoscope of the present utility model, since an external thread is provided on the outer surface of the threaded connection part of the spiral nail and an internal thread is provided at the end of the outer catheter, when it is necessary to remove the spiral nail due to improper installation position of the spiral nail, by rotating the outer catheter in the reverse direction, the outer catheter can be screwed onto the spiral nail. Further, by driving the reverse rotation of the spiral nail through the engagement between the guide wire and the spiral nail, the spiral nail can be gradually screwed from the outside of the outer catheter into the inside of the outer catheter, and at the same time, the spiral nail can be screwed out from the human tissue structure to realize the removal of the spiral nail.

[0028] In the present utility model, the above technical solutions can also be combined with each other to achieve more preferred combination schemes. Other features and advantages of the present utility model will be described in the subsequent specification, and some advantages can be made obvious from the specification or understood by implementing the present utility model. The purpose and other advantages of the present utility model can be realized and obtained from the content specifically pointed out in the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings are only for the purpose of showing specific embodiments and are not considered as a limitation to the present utility model. Throughout the drawings, the same reference signs represent the same components.

[0030] Figure 1 is a schematic structural diagram of the suture device for endoscope of the present utility model;

[0031] Figure 2 is an exploded view of the suture device for endoscope of the present utility model;

[0032] Figure 3 is a schematic internal structural diagram of the suture device for endoscope of the present utility model;

[0033] Figure 4 is a schematic structural diagram of the spiral nail of the suture device for endoscope of the present utility model;

[0034] Figure 5Schematic diagram of the fitting state of multiple screws and guide wires;

[0035] Figure 6 Schematic diagram of the separated state of the guide wire and the screw.

[0036] Reference numerals:

[0037] 1 - Guide wire; 2 - Outer catheter; 3 - Pull wire; 4 - Screw;

[0038] 101 - Guide wire body; 102 - Rotating boss; 103 - Rotating rib; 104 - Guide wire handle;

[0039] 201 - Internal thread; 202 - Catheter handle;

[0040] 401 - Upper sleeve; 402 - Threaded connection part; 403 - Engaging part; 404 - Screwing part; 405 - Threading hole; 406 - Sleeve inner cavity; 407 - Engaging groove; 408 - External thread; 409 - Engaging rib. Detailed implementation mode

[0041] The following combines the drawings to specifically describe the preferred embodiments of the present invention. Among them, the drawings form a part of the present invention and are used together with the embodiments of the present invention to explain the principle of the present invention, and are not used to limit the scope of the present invention.

[0042] Embodiment 1

[0043] A specific embodiment of the present invention discloses a suture device for an endoscope, which is characterized in that it includes: a guide wire 1, an outer catheter 2, a pull wire 3, a screw 4, a guide wire handle 104 and a catheter handle 202; the guide wire 1 is arranged above the screw 4, and a rotating boss 102 is arranged at the end of the guide wire 1; the rotating boss 102 can be engaged with the upper sleeve 401 of the screw 4, and when the guide wire 1 rotates, it can drive the screw 4 to rotate; the guide wire handle 104 is arranged at the upper end of the guide wire 1 and is used to drive the guide wire 1 to rotate; the end of the outer catheter 2 is provided with an internal thread 201; a plurality of screws 4 are arranged inside the outer catheter 2; the catheter handle 202 is arranged above the outer catheter 2 and is used to position the outer catheter 2; the screw 4 includes: an upper sleeve 401, a threaded connection part 402, an engaging part 403 and a screwing part 404; the engaging part 403 and the screwing part 404 of one screw 4 can be sleeved into the upper sleeve 401 of another screw 4; the threaded connection part 402 can be screwed with the internal thread 201; a threading hole 405 is arranged on the threaded connection part 402, and the pull wire 3 passes through the threading hole 405 to connect a plurality of screws 4 in series; when the screw 4 rotates, the screwing part 404 at the end of the screw 4 can be screwed into the tissue to be sutured.

[0044] During implementation, the guide wire 1 can be inserted into the interior of the outer catheter 2. The rotating boss 102 of the guide wire 1 can engage with the uppermost screw 4, and when the guide wire 1 rotates, it can drive multiple screws 4 to rotate synchronously. When the lowermost screw 4 rotates, the screwing portion 404 can be screwed into the tissue to be sutured. Then, by pulling the pull wire 3 tight, adjacent screws 4 can be brought closer to each other, thereby tightening the wound.

[0045] Specifically, as Figure 3 shown, the end of the outer catheter 2 is provided with a threaded section; the threaded section is provided with an internal thread 201.

[0046] Furthermore, a plurality of screws 4 are provided, and the plurality of screws 4 are nested and installed from top to bottom and can rotate synchronously. In this embodiment, after the first screw 4 (the end) is rotated and nailed in, the first screw 4 simultaneously disengages from the outer catheter 2. Then, the guide wire 1 can drive the second-to-last screw 4 to engage with the outer catheter 2. At this time, the position of the outer catheter 2 is adjusted through the endoscope, and thus the installation position of the second screw 4 can be adjusted.

[0047] Furthermore, the inner cavity diameter of the outer catheter 2 is equal to the outer diameter of the screw 4, and the screw 4 can slide in the inner cavity of the outer catheter 2. The external thread 408 is provided on the outside of the threaded connection portion 402, and the external thread 408 can be screwed with the internal thread 201 of the outer catheter 2.

[0048] Preferably, the number of threads of the internal thread 201 is equal to the number of threads of the external thread 408 on the outside of the screw 4. In this embodiment, by setting the number of threads of the internal thread 201 of the outer catheter 2 to be equal to the number of threads of the external thread 408 of the screw 4, there are two states: partial screwing and full screwing between the two.

[0049] In a specific implementation manner of the present utility model, as Figure 2 , Figure 3 shown, the upper sleeve 401, the threaded connection portion 402, the engaging portion 403, and the screwing portion 404 are sequentially arranged from top to bottom and are of an integral structure.

[0050] Specifically, as Figure 3 shown, the diameter of the upper sleeve 401 is smaller than the diameter of the threaded connection portion 402.

[0051] Specifically, as Figure 3 shown, the external thread 408 is provided on the outside of the threaded connection portion 402, and the external thread 408 can be screwed with the internal thread 201 of the outer catheter 2.

[0052] Specifically, the screwing part 404 is a spiral structure; preferably, the cross-section of the screwing part 404 is circular, oval, rectangular or triangular. When the whole screw 4 rotates, the screwing part 404 can rotate into the human tissue to realize the connection between the screw 4 and the tissue around the wound surface to be sutured of the patient.

[0053] Furthermore, in order to realize the synchronous release of the screw 4 from the outer catheter 2 and the screwing of the screw 4 into the human tissue; preferably, in this embodiment, the number of turns of the spiral of the screwing part 404 is equal to the number of turns of the thread of the internal thread 201.

[0054] Preferably, the pitch of the spiral structure of the screwing part 404 is set to be equal to the pitch of the internal thread 201. In this embodiment, by setting the pitch of the screwing part 404 to be equal to the pitch of the internal thread 201, the screw 4 can be gradually screwed out from the bottom of the outer catheter 2 and simultaneously screwed into the human tissue at the same speed.

[0055] Specifically, as Figure 2 、 Figure 3 shown, a sleeve inner cavity 406 is provided inside the upper sleeve 401, and a clamping groove 407 is provided on the side wall of the sleeve inner cavity 406; a plurality of clamping ridges 409 are provided on the outside of the clamping part 403; the clamping part 403 can be clamped into the sleeve inner cavity 406; the clamping ridges 409 can be clamped with the clamping groove 407, so that two adjacent screws 4 are mutually engaged and rotate synchronously.

[0056] Specifically, as Figure 2 、 Figure 6 shown, a rotating ridge 103 is provided on the outside of the rotating boss 102, and the rotating boss 102 and the rotating ridge 103 can be respectively clamped into the sleeve inner cavity 406 and the clamping groove 407.

[0057] As Figure 3 shown, a wire threading hole 405 is provided on the threaded connection part 402, and the pulling wire 3 is threaded into the wire threading hole 405.

[0058] Specifically, the wire threading hole 405 is provided at the edge of the threaded connection part 402 and is located outside the upper sleeve 401. Alternatively, the wire threading hole 405 is provided at the center of the threaded connection part 402 and penetrates through the clamping part 403; correspondingly, at least one wire outlet groove is provided on the side surface of the upper sleeve 401, so that the pulling wire 3 can extend out from the upper sleeve 401.

[0059] During implementation, when the pulling wire 32 is threaded into the wire threading hole 405, a plurality of screws 5 can be connected in series, and the connected screws 4 are mutually engaged, and then the rotation drive can be performed through the rotating boss 102 and the rotating ridge 103 at the end of the guide wire 1.

[0060] It should be noted that when multiple screws 4 are successively driven into human tissue, due to the rotation of the screw 4, the pull wire 3 will wind around the outside of the upper sleeve 401, achieving the effect of shortening the distance between the screws 4 to a certain extent and tightening the wound; when the wound is not tightened after two consecutive screws 4 are driven into the tissue, the pull wire 3 is pulled outward or the action of the endoscope is used to release it from the upper sleeve 401, and the pull wire 3 is continuously pulled outward to shorten the length of the pull wire 3 between the two screws 3, realizing the tightening of the wound surface.

[0061] Preferably, in this embodiment, the number of the screws 4 is set to four; the four screws are arranged from top to bottom in the state as Figure 4 shown, and the state where the four screws 4 are nested and engaged with each other is as Figure 5 shown. In this embodiment, the number of the screws 4 is not a limitation on the protection scope of the present invention, and the number of the screws 4 can be set according to needs in actual application.

[0062] As Figure 3 、 Figure 5 shown, the four screws 4 are respectively: the first screw 41, the second screw 42, the third screw 43 and the fourth screw 44.

[0063] Specifically, the rotating boss 102 and the rotating rib 103 at the end of the guide wire 1 are engaged with the inner cavity 406 and the engaging groove 407 of the sleeve of the first screw 41, so as to be able to drive the first screw 41 to rotate; the engaging part 403 and the engaging rib 409 of the first screw 41 are respectively inserted into the inner cavity 406 and the engaging groove 407 of the sleeve of the second screw 42, and can drive the second screw 42 to rotate; similarly, the second screw 42 can drive the third screw 43 to rotate, and the third screw 43 can drive the fourth screw 44 to rotate. When the fourth screw 44 rotates, it can be screwed with the internal thread 201 at the end of the outer catheter 2, and at the same time, the screwing part 404 at the end of the fourth screw 44 can be screwed into the tissue to be sutured.

[0064] Specifically, as Figure 2 shown, the outer end of the guide wire 1 is provided with a guide wire handle 104, and the guide wire handle 104 is arranged above the guide wire 1 and is used to drive the guide wire 1 to rotate.

[0065] Specifically, as Figure 2 shown, the outer end of the outer catheter 2 is provided with a catheter handle 202. The catheter handle 202 is arranged on one side of the outer catheter 2 and is fixedly connected to the outer catheter 2; during use, one hand holds the catheter handle 202 to position the outer catheter 2, and the other hand rotates the guide wire handle 104 to realize the rotation of the guide wire 1 relative to the outer catheter 2.

[0066] Preferably, the outer catheter 2 is made of a transparent material.

[0067] Furthermore, in the dimension design of the screw of the utility model, different models are set according to different application scenarios, that is, for different parts of the stomach, duodenum, colon and rectum, or the differences between the mucosal layer and the whole layer of the digestive tract wall, the appropriate size is adjusted during external installation. Exemplarily, the length of the screw is 5.5 mm for the stomach, 4 mm for the esophagus, 3 mm for the duodenum, and 3 mm for the colon and rectum. It is necessary to ensure that the depth of penetration into the muscular layer is sufficient and at the same time reduce the risk of damaging large blood vessels around. The utility model adjusts the appropriate size of the screw 4 according to different parts of the stomach, duodenum, colon and rectum, or the differences between the mucosal layer and the whole layer of the digestive tract wall, which helps to reduce the incidence of suture complications.

[0068] In this embodiment, by arranging multiple screws 4 to be mutually engaged from top to bottom, or in other words, multiple screws 4 are sequentially engaged, the synchronous rotation of multiple screws 4 is realized by driving with the guide wire 1; the rotational power of the guide wire 1 can be transmitted from top to bottom to the terminal screw 4, thereby driving the terminal screw 4 to rotate. During the rotation of the terminal screw 4, it can be gradually screwed with the internal thread 201 at the bottom end of the outer catheter 2, and at the same time, it is screwed into the human tissue for nailing; with the continuous rotation of the guide wire 1, the screw 4 can be gradually screwed out from the bottom end of the outer catheter 2, unscrewed from the internal thread 201, and at the same time, the function of the screw 4 rotating and nailing into the human tissue is completed.

[0069] For the endoscopic suture device of the utility model, a threaded section is provided at the lower end of the outer catheter 2, and at the same time, the external thread on the screw 4 can be screwed with the internal thread 201 of the threaded section. Then, by continuously rotating the guide wire 1, the terminal screw 4 is driven to rotate, and the screw 4 can be gradually screwed out of the outer catheter 2, realizing the rotational release of the screw 4; after one screw 4 is released, by continuing to rotate the guide wire 1, the next screw 4 can be driven to gradually change from the screwed state to the unscrewed state with the internal thread 201 at the end of the outer catheter 2, and finally, multiple screws can be sequentially rotationally released.

[0070] During implementation:

[0071] First, multiple spiral nails 4 and guide wires 1 are sequentially loaded into the outer catheter 2; the suturing device composed of the guide wire 1, the outer catheter 2, and the spiral nails 4 is inserted into the internal channel of the endoscope until the end of the outer catheter 2 passes through the catheter end of the endoscope. The endoscope is driven to move, and the outer catheter 2 and the spiral nails 4 inside it are moved to the periphery of the wound to be sutured, and the spiral nails 4 at the end are brought into contact with human tissue. Secondly, the guide wire 1 is rotated, and the top spiral nail 4 (the first spiral nail 41) that is interlocked with it is driven to rotate through the guide wire 1. Then, since the first spiral nail 41, the second spiral nail 42, the third spiral nail 43 and the fourth spiral nail 44 are nested and installed with each other, the rotational power can be sequentially transmitted from the first spiral nail 41 to the fourth spiral nail 44, and the fourth spiral nail 44 is driven to rotate. When the fourth spiral nail 44 rotates, it gradually screws with the internal thread 201 of the threaded section at the end of the outer catheter 2, and at the same time, the screwing part 404 at the bottom of the fourth spiral nail 44 gradually screws into the human tissue; further, the guide wire 1 is rotated until the fourth spiral nail 44 and the threaded section of the outer catheter 2 are screwed out, and the end spiral nail 4 is released from the outer catheter 2, and the first spiral nail 4 is installed. Repeat the above steps until all four spiral nails 4 are installed in place, and gradually tighten the pull wire 3 as the spiral nails 4 are installed. Under the pulling force of the pull wire 3, the two adjacent spiral nails 4 gradually approach each other, and then pull the tissue around the wound surface to converge to the middle, achieving a shrinking effect on the large wound surface.

[0072] Compared with the prior art, the technical solution of the utility model has at least one of the following beneficial effects:

[0073] 1. The suturing device of the utility model realizes endoscopic surgical continuous suturing or intermittent suturing of the wound surface by tightening the pull line 3. It has a simple structure and is easy to operate, which greatly reduces the difficulty of operation and improves the suturing efficiency.

[0074] 2. The suturing device of the present invention can screw the spiral nail 4 to or rotate it away from the thread of the outer catheter 2 simply by rotating the guide wire 1, thereby realizing the three functions of the spiral nail 4, namely, adjustable, rotatable, and releasable, and further improving the suturing effect.

[0075] 3. The suturing device of the utility model is assembled with spiral nails outside the body. If the wound tightening effect is not ideal after multiple spiral nails are inserted (the wound closure effect still needs to be strengthened), the spiral nails 4 can be further installed for suturing, and the spiral nails 4 can be further loaded into the outer catheter 2, and then the spiral nails 4 are screwed into the tissue to promote wound closure until the wound is closed well (completely closed) or until the wound can be clamped with an ordinary metal clip. The wound closure is completed and the thread can be cut with scissors, which is more flexible and active.

[0076] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model.

Claims

1. An endoscopic suture device, characterized in that, Comprising: A guide wire (1), an outer catheter (2), a pull wire (3), a screw (4), a guide wire handle (104) and a catheter handle (202); The guide wire (1) is arranged above the screw (4), and a rotating boss (102) is arranged at the end of the guide wire (1); the rotating boss (102) can be engaged with the upper sleeve (401) of the screw (4), and when the guide wire (1) rotates, the screw (4) can be driven to rotate; the guide wire handle (104) is arranged at the upper end of the guide wire (1) for driving the guide wire (1) to rotate; An internal thread (201) is arranged at the end of the outer catheter (2); a plurality of screws (4) are arranged inside the outer catheter (2); the catheter handle (202) is arranged above the outer catheter (2) for positioning the outer catheter (2); The screw (4) comprises: an upper sleeve (401), a threaded connection part (402), an engaging part (403) and a screwing part (404); the engaging part (403) and the screwing part (404) of one screw (4) can be sleeved into the upper sleeve (401) of another screw (4); the threaded connection part (402) can be screwed with the internal thread (201); A wire threading hole (405) is arranged on the threaded connection part (402), and the pull wire (3) passes through the wire threading hole (405) to connect a plurality of screws (4) in series; when the screw (4) rotates, the screwing part (404) at the end of the screw (4) can be screwed into the tissue to be sutured.

2. The endoscopic suturing device according to claim 1, wherein The inner cavity diameter of the outer catheter (2) is equal to the outer diameter of the screw (4), and the screw (4) can slide in the inner cavity of the outer catheter (2); an external thread (408) is arranged on the outer surface of the threaded connection part (402), and the external thread (408) can be screwed with the internal thread (201) of the outer catheter (2).

3. The endoscopic suturing device according to claim 2, wherein A sleeve inner cavity (406) is arranged inside the upper sleeve (401), and an engaging groove (407) is arranged on the side wall of the sleeve inner cavity (406).

4. The endoscopic suturing device according to claim 3, characterized in that, A rotating convex rib (103) is arranged on the outside of the rotating boss (102), and the rotating boss (102) and the rotating convex rib (103) can be respectively inserted into the sleeve inner cavity (406) and the engaging groove (407).

5. The endoscopic suturing device according to claim 4, wherein, A plurality of engaging convex ribs (409) are arranged on the outside of the engaging part (403); the engaging part (403) can be inserted into the sleeve inner cavity (406); the engaging convex ribs (409) can be engaged with the engaging groove (407) so that two adjacent screws (4) up and down are engaged with each other and rotate synchronously.

6. The endoscopic suturing device according to any one of claims 1-5, characterized in that, The wire threading hole (405) is arranged on the outside of the upper sleeve (401).

7. The endoscopic suture device according to any one of claims 1-5, characterized in that, The wire threading hole (405) is arranged at the center of the threaded connection part (402) and penetrates through the engaging part (403).

8. The endoscopic suturing device according to claim 1, wherein, The screwing part (404) is a spiral structure.

9. The endoscopic suturing device according to claim 8, wherein The cross section of the screwing part (404) is circular, oval, rectangular or triangular.

10. The endoscopic suture device according to claim 1, characterized in that, The number of the screw nails (4) is four, namely a first screw nail (41), a second screw nail (42), a third screw nail (43) and a fourth screw nail (44).

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