Telescopic wound suturing device for endoscope

Abstract

A wound surface suturing device for a telescopic endoscope comprises a hollow main pipe body with openings in the two ends, an operation area and a transfer area are arranged at the two ends in the main pipe body in the axial direction of the main pipe body respectively, an endoscope containing cavity for the endoscope to be inserted is formed in the operation area, and a first pipe body and a second pipe body which are distributed side by side are arranged in the main pipe body. During use, the first tube body and the second tube body advance, and the puncture part drives the connecting rod and the suture to penetrate through the suture surface together under the cooperation of the first ball and the second ball; after penetrating, the first pipe body and the second pipe body retreat, the connecting rod retreats from the empty area beside the suturing surface under the cooperation of the first ball body and the second ball body, one end of the suture line retreats from the empty area and is tightened, and puncture suturing is completed after multiple times of repetition. And finally, puncture and suture treatment can be conveniently and quickly performed on a perforated hole or a postoperative wound surface by using the suture line under an endoscope.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a retractable endoscopic wound suturing device. Background Technology

[0002] With the widespread use of endoscopic surgery, especially in the treatment of early-stage cancer, procedures such as tissue dissection, resection, full-thickness resection, and incision stoma are increasingly common. Clinically, cases of accidental tissue perforation, active stoma creation, or large wounds frequently arise. Currently, these situations mostly rely on hemostatic clips for closure, and there is a lack of a convenient and effective instrument that can use sutures at the tip of the endoscope to puncture and suture perforations or postoperative wounds. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of this invention is to provide a retractable endoscopic wound suturing device.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A retractable endoscopic wound suturing device includes a hollow main tube with openings at both ends. The two ends of the main tube along its own axis are an operating area and a transfer area, respectively. The operating area is provided with a placement cavity for inserting an endoscope. The main tube is provided with a first tube and a second tube arranged side by side.

[0006] The first tube body includes a first sutured end located in the transfer area and a first non-sutured end located in the operation area along its own axial direction. The first sutured end is provided with a first narrow groove and a first wide groove on the same axis. The first wide groove is located between the first narrow groove and the first non-sutured end.

[0007] The second tube body includes a second sutured end located in the transfer area and a second non-sutured end located in the operation area along its own axial direction. The second sutured end is provided with a puncture part outside and a second narrow groove and a second wide groove coaxially inside the second sutured end. The second narrow groove is located between the second wide groove and the second non-sutured end.

[0008] The first and second suture ends can move along their own axial direction to outside the transfer area; the first and second narrow slots are magnetic, and a connecting rod is provided between the first and second suture ends. One end of the suture is fixed to the connecting rod, and the two ends of the connecting rod are respectively provided with a first ball that can be attracted by the first narrow slot and a second ball that can be attracted by the second narrow slot. The first tube and the second tube are provided with a movable opening on their respective sides that allow the connecting rod to move. The connecting rod drives the first ball to be located in one of the first narrow slot, the first wide slot, or outside the first tube, and the connecting rod drives the second ball to be located in one of the second narrow slot, the second wide slot, or outside the second tube. The first tube and the second tube are provided with inlets and outlets for the corresponding balls to enter and exit.

[0009] Furthermore, it also includes a moving device that drives the first unstitched end and the second unstitched end to move along their own axial direction, thereby realizing the movement of the first sutured end and the second sutured end along their own axial direction.

[0010] Furthermore, the mobile device includes an inflation tube and a syringe. The operating area is also provided with a closed cavity. The cavity wall of the closed cavity is provided with a first through hole. The first through hole is connected to the syringe through the inflation tube. The cavity wall of the closed cavity is also provided with two second through holes. The first non-sutured end and the second non-sutured end are each inserted into the second through hole and located in the closed cavity. The closed cavity is also provided with a reset member for resetting the first non-sutured end and the second non-sutured end.

[0011] Furthermore, the endoscope cavity is located in the middle of the operating area, the enclosed cavity surrounds the endoscope cavity, and the first tube and the second tube are located on both sides outside the endoscope cavity.

[0012] Furthermore, it also includes a top plate, a bottom plate, and a side plate. The enclosed cavity is formed by the inner walls of the top plate, the bottom plate, the side plate, and the inner wall of the main tube. The top plate and the bottom plate are connected by the side plate. The outer wall of the side plate forms the inner wall of the mirror cavity. The top plate divides the internal chamber of the main tube into the operating area and the transfer area. Two second through holes are provided on the top plate.

[0013] Furthermore, pistons are provided at the ends of the first unstitched end and the second unstitched end away from the transfer area. The two pistons are located in the closed cavity, and the two sides of the two pistons respectively abut against the inner sidewall of the main body and the inner sidewall of the side plate.

[0014] Furthermore, the reset component consists of two springs, which are respectively sleeved on the first unstitched end and the second unstitched end, and the two ends of each spring along its own axial direction respectively abut against the top plate and the piston.

[0015] Furthermore, the main body is a transparent cap.

[0016] The beneficial effects of this invention are:

[0017] This invention proposes a retractable endoscopic wound suturing device. In use, the first and second tubes advance, and with the cooperation of the first and second spheres, the puncture part drives the connecting rod and suture together through the suture surface. After passing through, the first and second tubes retract, and with the cooperation of the first and second spheres, the connecting rod retracts from the empty area next to the suture surface, and one end of the suture retracts from the empty area and tightens. After repeating this process multiple times, the puncture and suturing are completed. Ultimately, this allows for convenient and rapid puncture and suturing of perforations or postoperative wounds under endoscopy. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is one of the schematic diagrams of a retractable endoscopic wound suturing device according to the present invention;

[0020] Figure 2 This is a second schematic diagram of a retractable endoscopic wound suturing device according to the present invention;

[0021] Figure 3 This is a schematic diagram of the top of the main body;

[0022] Figure 4 This is a schematic diagram of the bottom of the main body;

[0023] Figure 5 This is a vertical sectional view of a retractable endoscopic wound suturing device according to the present invention;

[0024] Figure 6 A schematic diagram of the first and second tubes;

[0025] Figure 7 This is a schematic diagram of the first and second suture ends;

[0026] Figure 8 This is one of the usage diagrams;

[0027] Figure 9 This is the second illustration;

[0028] Figure 10 This is diagram three;

[0029] Figure 11 This is diagram number four;

[0030] Figure 12 This is diagram number five;

[0031] Figure 13 This is diagram six;

[0032] In the diagram, 10 is the main tube; 101 is the operating area; 1011 is the endoscope cavity; 102 is the transfer area; 20 is the first tube; 201 is the first suture end; 2011 is the first narrow groove; 2012 is the first wide groove; 202 is the first non-suture end; 30 is the second tube; 301 is the second suture end; 3011 is the second narrow groove; 3012 is the second wide groove; 302 is the second non-suture end; 303 is the puncture site; 40 is the connecting rod; and 401 is the movable opening. 501. First sphere; 502. Second sphere; 60. Suture; 701. First ball inlet / outlet; 702. Second ball inlet / outlet; 703. First inlet / outlet chamber; 704. Second inlet / outlet chamber; 801. Inflation tube; 802. Syringe; 803. Closed cavity; 8031. First through hole; 8032. Second through hole; 804. Reset piece; 805. Top plate; 806. Bottom plate; 807. Side plate; 808. Piston; 90. Suture surface. Detailed Implementation

[0033] The following is combined with Figure 1-13 The present invention will be described in detail below.

[0034] A retractable endoscopic wound suturing device includes a hollow main body 10 with openings at both ends. The two ends of the main body 10 along its own axis are an operation area 101 and a transfer area 102, respectively. The operation area 101 is provided with a placement cavity 1011 for inserting an endoscope. The main body 10 is provided with a first tube 20 and a second tube 30 arranged side by side.

[0035] The first tube body 20 includes a first stitched end 201 located in the transfer area 102 and a first non-stitched end 202 located in the operation area 101 along its own axial direction. The first stitched end 201 is provided with a coaxial first narrow groove 2011 and a first wide groove 2012. The first wide groove 2012 is located between the first narrow groove 2011 and the first non-stitched end 202.

[0036] The second tube body 30 includes a second sutured end 301 located in the transfer area 102 and a second non-sutured end 302 located in the operation area 101 along its own axial direction. The second sutured end 301 is provided with a puncture part 303 outside and a coaxial second narrow groove 3011 and a second wide groove 3012 inside the second sutured end 301. The second narrow groove 3011 is located between the second wide groove 3012 and the second non-sutured end 302.

[0037] The first suture end 201 and the second suture end 301 can move along their own axial direction to outside the transfer area 102; the first narrow slot 2011 and the second narrow slot 3011 are magnetic, and a connecting rod 40 is provided between the first suture end 201 and the second suture end 301. One end of the suture 60 is fixed to the connecting rod 40, and the two ends of the connecting rod 40 are respectively provided with a first ball 501 that can be attracted by the first narrow slot 2011 and a second ball 502 that can be attracted by the second narrow slot 3011. The first tube 20 On the side of the second tube 30 that is close to each other, there is a movable opening 401 for the connecting rod 40 to move. The connecting rod 40 drives the first ball 501 to be located in one of the following locations: inside the first narrow slot 2011, inside the first wide slot 2012, or outside the first tube 20. The connecting rod 40 drives the second ball 502 to be located in one of the following locations: inside the second narrow slot 3011, inside the second wide slot 3012, or outside the second tube 30. The first tube 20 and the second tube 30 are provided with inlets and outlets for the corresponding balls to enter and exit.

[0038] Specifically, the dimensions of the puncture site 303 are ≤3 mm in length and ≤0.5 mm in diameter; the connecting rod is made of materials with excellent fracture resistance, such as titanium alloy and high-strength carbon fiber. Titanium alloy has the characteristics of high strength and good corrosion resistance, and can withstand large tensile and compressive forces. It is not easy to break during frequent movement and pulling, ensuring the stability and reliability of the connecting rod in the device. High-strength carbon fiber has the advantages of light weight and high specific strength, which not only reduces the weight of the entire device and facilitates operation, but also ensures that the connecting rod can still work normally in complex endoscopic operation environments and will not be damaged by minor external forces. At the same time, these materials also have good biocompatibility and will not have adverse effects on human tissues, meeting the safety standards for endoscopic medical devices. In addition, the surface of the connecting rod is specially treated to make it smoother, reducing friction when moving within the movable opening, further improving the operational flexibility and service life of the device.

[0039] After the suture 60 passes through the mirror cavity 1011, one end is fixed to the middle of the connecting rod 40. The first tube 20 and the second tube 30 are non-magnetic and made of non-magnetic materials, such as copper, aluminum, or austenitic stainless steel. The first tube 20 and the second tube 30 are hollow structures, with a first narrow slot 2011 and a first wide slot 2012, a second narrow slot 3011 and a second wide slot 3012 respectively inside. The first narrow slot 2011 and the second narrow slot 3011 establish a local magnetic field by embedding permanent magnets such as neodymium iron boron thin sheet magnets, samarium cobalt permanent magnets, or ferrite permanent magnets to attract the corresponding spheres. The permanent magnets can be made into thin-walled magnetic rings, suitable for embedding in the bottom of the slots, or into arc-shaped magnetic sheets, suitable for attaching to the inner sidewall of the slots. The permanent magnets can be coated or plated with materials such as nickel or epoxy resin to prevent corrosion or breakage.

[0040] To further enhance the fixation between the magnet and the card slot and prevent the magnet from shifting or falling off during use, an appropriate amount of medical-grade adhesive can be applied to the inside of the card slot.

[0041] The outer surfaces of the first tube 20 and the second tube 30 are coated with a bio-inert material such as polytetrafluoroethylene. This coating can prevent human tissue from rejecting the device and also prevent bacteria and other microorganisms from adhering to and growing on the surface of the device, thus improving the safety and hygiene of the device.

[0042] The specific configuration of the permanent magnet in the narrow slot can be as follows: an N52 neodymium iron boron thin-walled magnetic ring with an outer diameter of 1.4 mm, an inner diameter of 1.15 mm, and a thickness of 0.3 mm is embedded at the bottom of the narrow slot. It is radially magnetized, with a residual magnetism Br of 1.42–1.45 T. Using a gaussmeter (0.3 mm probe) placed close to the inner surface of the magnetic ring, the measured magnetic induction intensity is ≥0.25 T. The sphere is a pure iron sphere with a diameter of 1 mm and a surface plated with 2 µm of nickel, exhibiting an adsorption and holding force ≥0.20 N. The wide slot has no magnet, but its central magnetic induction intensity is ≤0.02 T, forming a magnetic field gradient ≥10:1, ensuring that the sphere, after detaching from the wide slot, can be quickly re-attracted and repositioned by the narrow slot.

[0043] The first wide card slot 2012 and the second wide card slot 3012 may not contain magnets, thus making them non-magnetic; the first wide card slot 2012 and the second wide card slot 3012 may also contain magnets with weaker magnetism than the first narrow card slot 2011 and the second narrow card slot 3011.

[0044] The first sphere 501 and the second sphere 502 are made of soft magnetic materials, such as pure iron or low-carbon steel. The soft magnetic spheres can be plated with nickel or gold to improve wear resistance and biocompatibility. In the initial state, the first sphere 501 is located in the first narrow slot 2011 and the second sphere 502 is located in the second narrow slot 3011. The diameters of the first sphere 501 and the second sphere 502 are slightly smaller than the inner diameter of the corresponding narrow slot, and the inner diameter of the narrow slot is smaller than the inner diameter of the wide slot. For example, if the sphere diameter is 1 mm, the inner diameter of the narrow slot is 1.05 mm, and the inner diameter of the wide slot is 1.1 mm.

[0045] The first tube 20 and the second tube 30 are provided with inlets and outlets for the corresponding balls to enter and exit, specifically including a first ball inlet, a second ball inlet, a first ball outlet, and a second ball outlet; regardless of whether the wide slot is magnetic, the first ball outlet is located at the end of the first wide slot 2012 away from the first narrow slot 2011, and the second ball outlet is located at the end of the second wide slot 3012 away from the second narrow slot 3011;

[0046] If the first wide slot 2012 and the second wide slot 3012 have a weaker magnetism than the first narrow slot 2011 and the second narrow slot 3011, then the first ball inlet is located at the end of the first wide slot 2012 away from the first narrow slot 2011, and the second ball inlet is located at the end of the second wide slot 3012 away from the second narrow slot 3011. In this way, each ball is first attracted into its corresponding wide slot by the weak magnetism, and then, because the narrow slot has a stronger magnetism, the ball is attracted to that narrow slot. For example... Figure 6 As shown, the inlet and outlet of the first ball can be combined into one and used together, referred to as the first ball inlet / outlet 701; the inlet and outlet of the second ball can be combined into one and used together, referred to as the second ball inlet / outlet 702.

[0047] If the first wide slot 2012 and the second wide slot 3012 are not magnetic, the first ball inlet is located at the end of the first narrow slot 2011 away from the first wide slot 2012, and the second ball inlet is located at the end of the second narrow slot 3011 away from the second wide slot 3012. In this way, each ball is directly attracted into the corresponding narrow slot.

[0048] like Figure 6 As shown, since each sutured end is not a separate tube, but is also connected to a corresponding unsutured end, in order to facilitate the ball's exit or entry from the inlet and outlet during use, the first sutured end 201 and the first unsutured end 202 are only connected by a portion of the side tube wall. Thus, the area between the first sutured end 201 and the first unsutured end 202 constitutes the first inlet / outlet chamber 703. After the first ball 501 exits from the first outlet, it passes through the first inlet / outlet chamber 703 and then exits the first tube 20. The second inlet / outlet chamber 704, which connects to the inlet / outlet 702 of the second ball, works similarly. If the inlet and outlet are set separately, then the inlet and outlet chambers are set separately.

[0049] To improve the reliability of the device and prevent the ball from prematurely or accidentally dislodging from the wide slot, the first and second outlets are elastic notches. As an expandable outlet structure, the outlet diameter is normally smaller than the ball diameter, such as 0.7-0.9 mm. Under pressure, the outlet is expanded, and the ball is squeezed out. More specifically, during the puncture or retraction phase, the connecting rod 40 pulls the ball to the elastic notch. The elastic deformation of the notch makes its own diameter larger than the ball diameter, allowing the ball to be smoothly squeezed out. After extrusion, the pulling force disappears, and the elastic notch rebounds and contracts, preventing the ball from accidentally falling out at other times. Specifically, the elastic notch is designed with two parallel grooves at the end of the wide slot, leaving a 0.2 mm thick cantilevered tongue. The free end of the tongue is recessed by 0.05–0.08 mm, and the diameter of the inscribed circle in its natural state is 0.7–0.9 mm.

[0050] In other embodiments, if the elastic notch is not provided and the diameters of the first and second outlets are directly larger than the diameter of the ball, then a "weak magnet" or "elastic tongue" can be provided near the outlet as a temporary stop to gently hold or hold the ball in place. Alternatively, the lengths of the first wide slot 2012 and the second wide slot 3012 can be increased to allow the ball to have a longer empty travel in the wide slots, making it less likely to come out of the wide slots and out of the tube.

[0051] In a design where the ball inlet and outlet are combined into one, an elastic limiting structure is directly installed at the opening of the wide slot. This elastic limiting structure, made of an elastic material such as rubber or silicone, is arc-shaped and surrounds the edge of the wide slot opening. When the ball enters the wide slot normally, its impact force overcomes the resistance of the elastic limiting structure, allowing it to enter smoothly. After the ball enters, the elastic limiting structure automatically returns to its original shape, forming a smaller opening to block the ball and prevent it from prematurely or accidentally exiting the wide slot. Furthermore, a smooth coating is applied to the surface of the elastic limiting structure to reduce friction between the ball and the structure during entry and exit, further improving the smoothness of the ball's movement in and out of the wide slot. This coating also has a certain degree of wear resistance, ensuring that the elastic limiting structure will not be damaged by frequent ball entry and exit during long-term use, thereby improving the service life and reliability of the entire device. Specifically, the coating can be a Teflon coating.

[0052] In this embodiment, a moving device is also included. The moving device drives the first non-suture end 202 and the second non-suture end 302 to move along their own axial direction, thereby realizing the movement of the first suture end 201 and the second suture end 301 along their own axial direction.

[0053] In this embodiment, the moving device includes an inflation tube 801 and a syringe 802. The operating area 101 is also provided with a closed cavity 803. The cavity wall of the closed cavity 803 is provided with a first through hole 8031, which is connected to the syringe 802 through the inflation tube 801. The cavity wall of the closed cavity 803 is also provided with two second through holes 8032. The first non-sutured end 202 and the second non-sutured end 302 are each inserted into the second through holes 8032 and located in the closed cavity 803. The closed cavity 803 is also provided with a reset member 804 for resetting the first non-sutured end 202 and the second non-sutured end 302. In addition to using air pressure to push, the first non-sutured end 202 and the second non-sutured end 302 can also be connected to a push block. At least part of the push block is exposed outside the side wall of the main tube. The first sutured end 201 and the second sutured end 301 can be moved along their own axial direction by pushing the push block by hand.

[0054] In this embodiment, the mirror cavity 1011 is located in the middle of the operating area 101, the closed cavity 803 surrounds the mirror cavity 1011, and the first tube 20 and the second tube 30 are located on both sides outside the mirror cavity 1011.

[0055] In this embodiment, a top plate 805, a bottom plate 806, and a side plate 807 are also included. The enclosed cavity 803 is formed by the inner sidewalls of the top plate 805, the bottom plate 806, and the side plate 807, as well as the inner sidewall of the main tube 10. The top plate 805 and the bottom plate 806 are connected by the side plate 807. The outer sidewall of the side plate 807 forms the inner wall of the mirror cavity 1011. The top plate 805 divides the internal chamber of the main tube 10 into an operating area 101 and a transfer area 102. Two second through holes 8032 are provided on the top plate 805.

[0056] In this embodiment, pistons 808 are provided at the ends of the first unstitched end 202 and the second unstitched end 302 away from the transfer area 102. The two pistons 808 are located in the closed cavity 803, and the two sides of the two pistons 808 respectively abut against the inner sidewall of the main tube 10 and the inner sidewall of the side plate 807. Specifically, when air is injected into the closed inflation tube 801 with the syringe 802, the pressure in the closed cavity 803 increases. The atmospheric pressure acting on the bottom of the piston 808 is sufficient to overcome friction and external load, thereby pushing the piston 808 to move, and the first tube 20 and the second tube 30 are pushed outward accordingly.

[0057] In this embodiment, the reset member 804 consists of two springs, which are respectively sleeved on the first non-stitched end 202 and the second non-stitched end 302, and the two ends of each spring along its own axial direction abut against the top plate 805 and the piston 808 respectively.

[0058] In this embodiment, the main body 10 is a transparent cap; furthermore, this suturing device is for single use only to avoid cross-infection.

[0059] The working principle of the retractable endoscopic wound suturing device proposed in this invention is as follows:

[0060] In simple terms, the first tube 20 and the second tube 30 advance, and with the cooperation of the first ball 501 and the second ball 502, the puncture part 303 drives the connecting rod 40 and the suture 60 to pass through the suture surface 90 together; after passing through, the first tube 20 and the second tube 30 retreat, and with the cooperation of the first ball 501 and the second ball 502, the connecting rod 40 retreats from the empty area next to the suture surface 90, and one end of the suture 60 retreats from the empty area, tightens, and the puncture and suture are completed after repeated multiple times.

[0061] Specifically:

[0062] In the initial state, the first ball 501 is in the first narrow slot 2011, the second ball 502 is in the second narrow slot 3011, and both ends of the connecting rod 40 are magnetically locked and constrained.

[0063] Step 1, the tube pushing stage: The syringe 802 injects air into the closed cavity 803 through the inflation tube 801. The air pressure pushes the two pistons 808, pushing the first suture end 201 and the second suture end 301 outside the transfer zone 102, exposing them outside the transparent cap. At this time, the connecting rod 40 lies between the first suture end 201 and the second suture end 301. The area outside the transfer zone 102 refers to the area to be sutured, containing the suture surface 90, which refers to the postoperative wound surface to be sutured.

[0064] Step 2, the puncture stage: After the first suture end 201 and the second suture end 301 are pushed a certain distance outside the transfer area 102, the first suture end 201 moves towards the empty area next to the suture surface 90 without entering the suture surface 90 together. Meanwhile, the puncture part 303 of the second suture end 301 pierces the suture surface 90, creating a passage in the suture surface 90. During the puncture, the horizontal connecting rod 40 is blocked by the suture surface 90, and the first ball 501 is pulled inward. The first ball 501 moves sequentially from the first narrow slot 2011 to the first wide slot 2012, and then leaves the first suture end 201 from the first exit. At this time... Figure 8 As shown, the connecting rod 40 is released from its magnetically locked state between the first stitching end 201 and the second stitching end 301. The first ball 501 is in a free state, while the second ball 502 remains within the first narrow slot 2011. With the first stitching end 201 and the second stitching end 301 continuing to advance towards the area to be stitched, the connecting rod 40 at this time... Figure 9 As shown, the connecting rod 40 passes through the opening of the suture surface 90 along with the second suture end 301, almost touching the second tube body 30. When the connecting rod 40 passes through the suture surface 90, one end of the suture 60 fixed on the connecting rod 40 also passes through the suture surface 90.

[0065] like Figure 10 As shown, after the puncture part 303, connecting rod 40, and suture 60 pass through the suture surface 90 together (the puncture part 303 and connecting rod 40 pass through completely, while the suture 60 only passes through partially), the connecting rod 40 is no longer obstructed by the suture surface 90, so the first sphere 501 will... Figure 11 As shown, it is attracted by the magnetism within the first narrow card slot 2011 and re-enters the first narrow card slot 2011.

[0066] Step 3: Backtracking phase: such as Figure 12 As shown, the first suture end 201 and the second suture end 301 retract together. During the retraction, the connecting rod 40 gradually tilts towards the position of the first suture end 201. The connecting rod 40 is blocked by the suture surface 90, and the second ball 502 is pulled outward. The second ball 502 moves sequentially from the second narrow slot 3011 to the second wide slot 3012, and then leaves the second suture end 301 from the second outlet. At this time, the connecting rod 40 is released from the state of being magnetically locked between the first suture end 201 and the second suture end 301. The connecting rod 40 retracts along with the first suture end 201 in the empty area next to the suture surface 90, almost touching the first tube body 20. Meanwhile, one end of the suture 60 turns and moves from the suture surface 90 to the empty area next to the suture surface 90. At this time, the suture 60 is in an inverted U-shape.

[0067] like Figure 13 As shown, after the puncture part 303 exits the suture surface 90, the connecting rod 40 also exits and returns to its free state. Therefore, the second ball 502 will be attracted by the magnetism in the second narrow slot 3011 and re-enter the second narrow slot 3011.

[0068] Tighten the suture by 60mm, then perform the next puncture and suture, repeating this process multiple times until the suture is complete. The final portion needs to be cut with endoscopic scissors, and the 60mm suture stump should be clamped with a hemostatic clip to complete the suture.

[0069] Step 4: When the sewing is completed, the air is released, the piston 808 and the spring are no longer compressed, and the first non-sewn end 202 and the second non-sewn end 302 return to their initial positions under the reset action of the spring, thereby driving the first sewn end 201 and the second sewn end 301 to be retracted into the transparent cap.

[0070] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand and implement the present invention. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A retractable endoscopic wound suturing device, characterized in that, It includes a hollow main tube with openings at both ends. The two ends of the main tube along its own axis are an operating area and a transfer area, respectively. The operating area is provided with a placement cavity for inserting an endoscope. The main tube is provided with a first tube and a second tube arranged side by side. The first tube body includes a first sutured end located in the transfer area and a first non-sutured end located in the operation area along its own axial direction. The first sutured end is provided with a first narrow groove and a first wide groove on the same axis. The first wide groove is located between the first narrow groove and the first non-sutured end. The second tube body includes a second sutured end located in the transfer area and a second non-sutured end located in the operation area along its own axial direction. The second sutured end is provided with a puncture part outside and a second narrow groove and a second wide groove coaxially inside the second sutured end. The second narrow groove is located between the second wide groove and the second non-sutured end. The first and second suture ends can move along their own axial direction to outside the transfer area; the first and second narrow slots are magnetic, and a connecting rod is provided between the first and second suture ends. One end of the suture is fixed to the connecting rod, and the two ends of the connecting rod are respectively provided with a first ball that can be attracted by the first narrow slot and a second ball that can be attracted by the second narrow slot. The first tube and the second tube are provided with a movable opening on their respective sides that allow the connecting rod to move. The connecting rod drives the first ball to be located in one of the first narrow slot, the first wide slot, or outside the first tube, and the connecting rod drives the second ball to be located in one of the second narrow slot, the second wide slot, or outside the second tube. The first tube and the second tube are provided with inlets and outlets for the corresponding balls to enter and exit.

2. The retractable endoscopic wound suturing device as described in claim 1, characterized in that, It also includes a moving device that drives the first unstitched end and the second unstitched end to move along their own axial direction, thereby realizing the movement of the first sutured end and the second sutured end along their own axial direction.

3. The retractable endoscopic wound suturing device as described in claim 2, characterized in that, The mobile device includes an inflation tube and a syringe. The operating area is also provided with a closed cavity. The cavity wall of the closed cavity is provided with a first through hole. The first through hole is connected to the syringe through the inflation tube. The cavity wall of the closed cavity is also provided with two second through holes. The first non-sutured end and the second non-sutured end are each inserted into the second through hole and located in the closed cavity. The closed cavity is also provided with a reset member for resetting the first non-sutured end and the second non-sutured end.

4. The retractable endoscopic wound suturing device as described in claim 3, characterized in that, The endoscope cavity is located in the middle of the operating area, the enclosed cavity surrounds the endoscope cavity, and the first tube and the second tube are located on both sides outside the endoscope cavity.

5. A retractable endoscopic wound suturing device as described in claim 4, characterized in that, It also includes a top plate, a bottom plate, and a side plate. The enclosed cavity is formed by the inner walls of the top plate, the bottom plate, the side plate, and the inner wall of the main tube. The top plate and the bottom plate are connected by the side plate. The outer wall of the side plate forms the inner wall of the mirror cavity. The top plate divides the internal chamber of the main tube into the operating area and the transfer area. Two second through holes are provided on the top plate.

6. A retractable endoscopic wound suturing device as described in claim 5, characterized in that, The first unstitched end and the second unstitched end are provided with pistons at their ends away from the transfer area. The two pistons are located in the closed cavity, and the two sides of the two pistons respectively abut against the inner sidewall of the main body and the inner sidewall of the side plate.

7. A retractable endoscopic wound suturing device as described in claim 6, characterized in that, The reset component consists of two springs, which are respectively sleeved on the first unstitched end and the second unstitched end, and the two ends of each spring along its own axial direction abut against the top plate and the piston, respectively.

8. A retractable endoscopic wound suturing device as described in any one of claims 1-7, characterized in that, The main body is a transparent cap.

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