Suturing device for duodenal endoscopic perforation

Abstract

The present invention belongs to the technical field of endoscopic surgical instruments, and provides a suturing device for endoscopic treatment of postoperative perforation in the duodenum. A suturing device for endoscopic treatment of postoperative perforation in the duodenum comprises a flexible element and a fistula. The suturing device comprises at least two implant units, each implant unit is provided with at least two connecting holes, the flexible element is connected in series with the connecting holes of the implant unit, the implant unit is fixed to the flexible element, the implant unit can be fixed around the fistula, and the implant unit can be fixed on the outside of the duodenum. By cooperating with the flexible element and the implant unit, the entanglement and fixation of the flexible element can be achieved in vitro, which simplifies the steps of the suturing operation and improves the suturing quality of the fistula. The implant unit avoids the need to manually manipulate the suturing needle and the tissue near the fistula in a narrow space for repeated puncture, thereby reducing the difficulty of the suturing operation and shortening the suturing time of the fistula.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscopic surgical instruments, and in particular provides a suturing device for treating perforation after endoscopic treatment of the duodenum. Background Art

[0002] With the advancement of endoscopic screening technology, more and more early gastrointestinal cancers are being detected. Endoscopic treatment techniques include endoscopic mucosal resection (EMR) and endoscopic submucosal dissection (ESD). EMR and ESD play a crucial role in the diagnosis and treatment of early gastrointestinal cancer. However, endoscopic surgery in the duodenum is technically challenging and carries a high risk of bleeding and perforation due to its unique anatomical features. The duodenum is anatomically C-shaped, with a steep curvature and limited intraluminal space. Furthermore, the duodenal wall is thin, making perforation more likely during endoscopic surgery. Once perforation occurs, traditional titanium clips often struggle to close the fistula due to the limited space and high tension. Therefore, manual suturing is often attempted clinically. If manual suturing is unsuccessful, surgical treatment is required. However, surgical procedures are invasive and often difficult for patients to accept, leading to frequent medical disputes. Manual suturing during endoscopic surgery, however, requires conventional biopsy forceps to hold the suture needle in a confined space, making it difficult and technically challenging. Based on this, it is very necessary to design a suturing device for postoperative perforation of the duodenal endoscopic treatment. The prior art CN117838217A is an endoscopic suturing system through an endoscopic biopsy channel, comprising an endoscope, the endoscope including a clamp channel hole, a suture needle, a cannula and a needle holder. The flexible cannula is used in conjunction with the suture needle with a small curvature. The suture needle is delivered to the digestive tract wound to be sutured through the clamp channel hole. The suture needle does not come into contact with the digestive tract lumen during delivery and recovery. The opening and closing of the first and second jaws are controlled by one hand. The inventor believes that there is a lot of room for improvement in the existing technology. Summary of the Invention

[0003] The present invention aims to replace manual suturing of perforations after endoscopic duodenal surgery with a suturing device, thereby reducing the operational difficulty of suturing in confined spaces under endoscopy and improving the suturing quality of fistulas in confined spaces. Secondly, the suturing operation is simplified, reducing the operator's operational threshold and labor intensity; shortening the suturing time of the fistula and reducing the discomfort caused by endoscopic surgery to the human body. To this end, the present invention provides a suturing device for endoscopic duodenal surgery for perforations after endoscopic duodenal surgery, comprising a flexible element and a fistula. The suturing device comprises at least two implant units, each of which has at least two connecting holes. The flexible element is connected in series with the connecting holes of the implant units, and the implant units can be fixed around the fistula, and the implant units can be fixed on the outside of the duodenum. By using the flexible element and the implant unit in combination, the flexible element is entangled and fixed in vitro, simplifying the suturing operation steps and improving the suturing quality of the fistula. The implant unit also completes the suturing operation of repeatedly puncturing the tissue around the fistula through the suturing needle, avoiding the need to manually manipulate the suturing needle and repeatedly puncture the tissue near the fistula in a confined space, reducing the operational difficulty of the suturing operation and shortening the suturing time of the fistula.

[0004] Preferably, the suturing device further comprises at least two puncture mechanisms, wherein a first channel is provided inside the puncture mechanism, the first channel extending along the length direction of the puncture mechanism, the flexible element and the implant unit can pass through the first channel, the width of the implant unit is smaller than the inner diameter of the first channel, and the distance between the connecting holes of the implant unit is larger than the outer diameter of the puncture mechanism. Multiple puncture mechanisms are used to puncture the tissue around the fistula opening, and the number of puncture mechanisms is determined according to the size of the fistula opening and the required fixed structure.

[0005] Preferably, the puncture mechanism includes a delivery mechanism, which is located inside the first channel and can deliver the implant unit out of the first channel. A through hole is provided in the length direction of the delivery mechanism to allow the flexible element to pass through. Each puncture mechanism has a flexible element and an implant unit inside. The implant unit is pushed out of the first channel by the delivery mechanism. Since the spacing between the connection holes of the implant unit is larger than the puncture aperture, the implant unit is fixed to the outside of the duodenal fistula after deflection, pulling the flexible element to complete the tightening of the fistula, avoiding the use of suture needles to repeatedly puncture around the fistula, reducing the difficulty of the operation and shortening the operation time. At the same time, since the implant unit has structural strength, it can avoid the loosening of the flexible element due to the large tension of the suture part itself, thereby improving the suture quality.

[0006] Preferably, the puncture mechanism further comprises a puncture portion, the puncture portion is provided with a tip capable of puncturing tissue near the fistula opening, a semi-through groove is provided along the length direction of the puncture portion, the puncture portion has a curvature, and the semi-through groove is located on the inner side of the curved outer shape of the puncture portion. The semi-through groove is used to lead out one end of the flexible element that fixes the implant unit to connect to the adjacent implant unit, so as to facilitate the subsequent pulling of the flexible element to tighten all the implant units and complete the tightening of the fistula opening, thereby avoiding the situation where the fistula opening cannot be fully tightened due to the excessive redundancy of the flexible element, thereby affecting the suture quality and even causing fistula opening infection; the puncture portion has a curvature, which is suitable for suturing in a narrow space. At the same time, during the puncture process, the curvature of the puncture portion expands the actual puncture position of the puncture portion, which can adapt to the larger fistula opening caused by the physiological contraction of the tissue around the fistula opening, thereby improving the reliability of the suturing.

[0007] Preferably, the puncture mechanisms are circumferentially distributed, and each puncture mechanism is connected in series using an elastic body. Since fistula openings are mostly circular, the circumferential distribution of the puncture mechanisms can adapt to most fistula openings, thereby completing the puncture of the tissue surrounding the fistula opening and the fixation of the implant unit, completing the fistula opening suturing work; in order to improve the adaptability of the puncture mechanisms to fistula openings with special shapes, the puncture mechanisms are connected in series using elastic bodies, and the position of the puncture mechanisms can be changed by changing the shape of the elastic body to complete the puncture of the tissue surrounding the fistula opening with special shapes; at the same time, the circumferential distribution of the puncture mechanisms allows multiple puncture mechanisms to complete the puncture of the tissue surrounding the fistula opening at the same time, avoiding repeated puncture of the tissue surrounding the fistula opening, reducing the difficulty of suturing, and shortening the operation time.

[0008] Preferably, the suturing device further comprises at least two puncture and fixation units, each puncture and fixation unit being coupled to each puncture mechanism. A first connection hole is provided on the front face of the puncture and fixation unit, and the other end of the tip of the puncture portion is secured to the first connection hole. The puncture and fixation units are used to secure the puncture mechanisms, and the elastic body is used to combine the multiple puncture mechanisms into a single unit, enabling the multiple puncture mechanisms to collaboratively complete the puncture of tissue surrounding the fistula opening.

[0009] Preferably, a second connection hole is provided on the side of the puncture fixation unit, through which an elastic body is passed to connect each puncture fixation unit in series. The puncture fixation unit is fixed to the elastic body, which is provided with a notch. The notch in the elastic body facilitates the installation of different numbers of puncture fixation units and puncture fixation units of different shapes, thereby adjusting the number of fixed units implanted around the fistula opening and the puncture position of the puncture mechanism, thereby accommodating fistula openings of different sizes and shapes.

[0010] Preferably, the suturing device further comprises an endoscopic outer guide sleeve, the inner wall of the endoscopic outer guide sleeve being provided with a first protrusion, the bottom surface of the puncture and fixation unit being provided with a first recess, the first protrusion and the first recess being adapted to cooperate, and the puncture and fixation unit being rotatable relative to the first protrusion. Because the puncture portion of the puncture mechanism has a curvature, it needs to deflect during the puncture process to adapt to the contracted tissue around the fistula opening, and the endoscopic outer guide sleeve and the puncture and fixation unit are adapted to achieve deflection of the puncture mechanism; at the same time, because the position of the implant unit is fixed during the withdrawal of the puncture mechanism, the deflection of the puncture mechanism at this time stretches the flexible element connected to the implant unit, thereby tightening the flexible element and tightening the fistula opening.

[0011] Preferably, the suturing device further comprises an endoscopic inner catheter, the outer wall of the endoscopic inner catheter being provided with a second recessed portion, the top of the puncture fixing unit being provided with a second protrusion, the second recessed portion and the second protrusion being matched, the endoscopic inner catheter being provided with a second channel, the second channel extending along the length direction of the endoscopic inner catheter, the second channel allowing the flexible element to pass through. Since the puncture portion of the puncture mechanism has a curvature, it needs to deflect during the puncture process to adapt to the contracted tissue around the fistula opening, the endoscopic inner catheter and the puncture fixing unit are used to achieve the deflection of the puncture mechanism, the endoscopic inner catheter and the endoscopic outer guide sleeve cooperate with each other to restrict both sides of the puncture mechanism, so that the puncture mechanism deflects at a desired angle, stretching the flexible element; at the same time, since the position of the implant unit is fixed during the withdrawal of the puncture mechanism, the deflection of the puncture mechanism at this time will stretch the flexible element connected to the implant unit, thereby tightening the flexible element.

[0012] Preferably, the puncture fixation unit is fan-shaped, with adjacent puncture fixation units spaced apart. The fan-shaped puncture fixation unit adapts to the shape of the endoscope inner catheter and the endoscope outer guide sleeve, making it easier for adjacent puncture fixation units to cooperate with each other to form a ring, thereby achieving a puncture mechanism provided around the fistula opening for puncturing the fistula opening.

[0013] The purpose of the invention is to realize the use of a suturing device to replace manual suturing of postoperative perforation in duodenal endoscopy treatment, reduce the operational difficulty of suturing in a narrow space under endoscopy, improve the suturing quality of fistulas in a narrow space, and have the following beneficial effects: simplifying the suturing operation, reducing the operating threshold and labor intensity of the operator; shortening the suturing time of the fistula, reducing the discomfort caused to the human body by endoscopic surgery, using a flexible element and an implant unit to realize the entanglement and fixation of the flexible element in vitro, simplifying the steps of the suturing operation, and improving the suturing quality of the fistula; and completing the suturing operation of the suture needle repeatedly puncturing the tissue around the fistula through the implant unit, avoiding the need to manually manipulate the suture needle and the tissue near the fistula in a narrow space for repeated puncture, reducing the operational difficulty of the suturing operation, and shortening the suturing time of the fistula. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0015] Figure 1 is a schematic structural diagram of a suturing device;

[0016] Figure 2 is a schematic cross-sectional structural diagram of a suturing device;

[0017] Figure 3 This is a partial enlarged view of the puncture fixation unit of the present invention;

[0018] Figure 4 It is a schematic structural diagram of the puncture fixation unit and the elastic body of the present invention;

[0019] Figure 5 This is a schematic structural diagram of the puncture fixation unit of the present invention;

[0020] Figure 6 Schematic diagram of the front view of the puncture fixation unit of the present invention;

[0021] Figure 7 Schematic diagram of the cross-sectional structure of the puncture fixation unit of the present invention;

[0022] Figure 8 Schematic diagram of the top view of the puncture mechanism of the present invention;

[0023] Figure 9 Schematic diagram of the cross-sectional structure of the puncture mechanism of the present invention;

[0024] Figure 10 This is a schematic diagram of the structure of the implant unit of the present invention for fixing the fistula;

[0025] Figure 11 Schematic diagram of the structure of the implant unit and flexible element of the present invention.

[0026] Explanation of the reference numerals: 1 puncture mechanism; 11 semi-through groove; 12 delivery mechanism; 2 endoscope outer guide sleeve; 21 first protrusion; 3 puncture fixation unit; 31 first recess; 32 second protrusion; 33 first connecting hole; 34 second connecting hole; 4 endoscope inner catheter; 41 second recess; 5 implantation unit; 6 flexible element; 7 fistula opening; 8 elastomer; 81 notch. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] Example 1

[0029] Combine Figure 1 、 Figure 2 and Figure 3 As shown, a suturing device for endoscopic treatment of postoperative perforation of the duodenum includes a flexible element 6 and a fistula 7. The suturing device includes at least two implant units 5, each of which is provided with two connecting holes. The flexible element 6 is connected in series with the connecting holes of the implant unit 5. The implant unit 5 can be fixed around the fistula 7 and can be fixed on the outside of the duodenum. The flexible element and the implant unit 5 are used in combination to achieve entanglement and fixation of the flexible element 6 in vitro, simplifying the steps of the suturing operation and improving the suturing quality of the fistula 7. The suturing operation of repeatedly puncturing the tissue around the fistula 7 with the suturing needle is completed through the implant unit 5, avoiding the need to manually manipulate the suturing needle and the tissue near the fistula 7 for repeated puncture in a narrow space, reducing the difficulty of the suturing operation and shortening the suturing time of the fistula 7.

[0030] The suturing device also includes five puncture mechanisms 1. Each puncture mechanism 1 has a first channel defined therein. The first channel extends along the length of the puncture mechanism 1, allowing the flexible element 6 and the implant unit 5 to pass through the first channel. The width of the implant unit 5 is smaller than the inner diameter of the first channel, and the distance between the connecting holes of the implant unit 5 is greater than the outer diameter of the puncture mechanism 1. Multiple puncture mechanisms 1 are used to puncture the tissue surrounding the fistula opening 7. The number of puncture mechanisms 1 is determined by the size of the fistula opening 7 and the required fixed structure.

[0031] The puncture mechanisms 1 are arranged in a circular pattern, and each puncture mechanism 1 is connected in series with an elastic body. Since fistula openings 7 are mostly circular, the puncture mechanisms 1 arranged in a circular pattern can adapt to most fistula openings 7, thereby completing the puncture of the tissue surrounding the fistula opening 7 and the fixation of the implant unit 5, thus completing the suturing of the fistula opening 7. In order to improve the adaptability of the puncture mechanisms 1 to fistula openings 7 with special shapes, the puncture mechanisms 1 are connected in series with elastic bodies. By changing the shape of the elastic body, the position of the puncture mechanisms 1 can be changed to complete the puncture of the tissue surrounding the fistula opening 7 with special shapes. At the same time, the puncture mechanisms 1 are arranged in a circular pattern, so that multiple puncture mechanisms 1 can simultaneously complete the puncture of the tissue surrounding the fistula opening 7, avoiding repeated puncture of the tissue surrounding the fistula opening 7, reducing the difficulty of suturing, and shortening the operation time.

[0032] like Figure 4As shown, the suturing device further includes five puncture fixation units 3, each of which cooperates with each puncture mechanism 1. The front surface of the puncture fixation unit 3 is provided with a first connection hole 33, and the other end of the tip of the puncture portion is fixed to the first connection hole 33. The puncture fixation unit 3 is used to fix the puncture mechanism 1, and the elastic body is used to combine the multiple puncture mechanisms 1 into a whole, so that the multiple puncture mechanisms 1 can cooperate to complete the puncture of the tissue around the fistula 7.

[0033] The puncture fixation unit 3 is fan-shaped, with spaces between adjacent puncture fixation units 3. The fan-shaped puncture fixation unit 3 adapts to the shape of the endoscope inner catheter 4 and the endoscope outer guide sleeve, making it easy for adjacent puncture fixation units 3 to cooperate with each other to form a ring, so that the fistula opening 7 is provided with a puncture mechanism 1 around it to puncture the fistula opening 7.

[0034] like Figure 3 As shown, the suturing device also includes an endoscopic inner catheter 4, the outer wall of which is provided with a second recessed portion 41, and the top of the puncture and fixation unit 3 is provided with a second protrusion 32, the second recessed portion 41 and the second protrusion 32 cooperate with each other, and the endoscopic inner catheter 4 is provided with a second channel, which extends along the length direction of the endoscopic inner catheter 4, and the second channel allows the flexible element 6 to pass through. Because the puncture portion of the puncture mechanism 1 has a curvature, it needs to deflect during the puncture process to adapt to the contracted tissue around the fistula 7. The endoscopic inner catheter 4 and the puncture and fixation unit 3 cooperate to achieve the deflection of the puncture mechanism 1. The endoscopic inner catheter 4 and the endoscopic outer guide sleeve cooperate with each other to restrict both sides of the puncture mechanism 1, so that the puncture mechanism 1 deflects at the required angle, stretching the flexible element 6; at the same time, because the position of the implant unit 5 is fixed during the withdrawal process of the puncture mechanism 1, the deflection of the puncture mechanism 1 will stretch the flexible element 6 connected to the implant unit 5, thereby tightening the flexible element.

[0035] Combine Figure 5 、 Figure 6 、 Figure 7 As shown, a second connection hole 34 is provided on the side of the puncture and fixation unit 3. An elastic body 8 passes through the second connection hole 34 and connects each puncture and fixation unit 3 in series. The puncture and fixation unit 3 is fixed to the elastic body. The elastic body 8 has a notch 81. The notch 81 in the elastic body 8 facilitates the installation of different numbers of puncture and fixation units 3 and puncture and fixation units 3 of different shapes, thereby adjusting the number of fixed implant units 5 around the fistula 7 and the puncture position of the puncture mechanism 1 to accommodate fistulas 7 of different sizes and shapes.

[0036] like Figure 3As shown, the suturing device further includes an endoscopic outer guide sleeve, the inner wall of which is provided with a first protrusion 21, and the bottom surface of the puncture and fixation unit 3 is provided with a first recessed portion 31. The first protrusion 21 and the first recessed portion 31 cooperate with each other, and the puncture and fixation unit 3 rotates relative to the first protrusion 21. Since the puncture portion of the puncture mechanism 1 has a curvature, it needs to deflect during the puncture process to adapt to the contracted tissue around the fistula 7. The endoscopic outer guide sleeve and the puncture and fixation unit 3 cooperate to achieve the deflection of the puncture mechanism 1. At the same time, since the position of the implant unit 5 is fixed during the withdrawal of the puncture mechanism 1, the deflection of the puncture mechanism 1 at this time will stretch the flexible element 6 connected to the implant unit 5, thereby tightening the flexible element and tightening the fistula 7.

[0037] like Figure 8 As shown, the puncture mechanism 1 includes a delivery mechanism 12, which is located inside the first channel. The delivery mechanism 12 can push the implant unit 5 out of the first channel. The length direction of the delivery mechanism 12 is provided with a through hole that allows the flexible element 6 to pass through. Each puncture mechanism 1 has a flexible element 6 and an implant unit 5 inside. The implant unit 5 is pushed out of the first channel by the delivery mechanism 12. Since the spacing between the connection holes of the implant unit 5 is larger than the puncture hole diameter, the implant unit 5 is fixed to the outside of the duodenal fistula 7 after deflection, pulling the flexible element 6 to complete the tightening of the fistula 7, avoiding the use of a suture needle to repeatedly puncture around the fistula 7, reducing the difficulty of the operation and shortening the operation time. At the same time, since the implant unit 5 has structural strength, it can avoid the loosening of the flexible element 6 due to the large tension of the suture part itself, which can improve the suture quality.

[0038] like Figure 9 As shown, the puncture mechanism 1 also includes a puncture part, which is provided with a tip capable of puncturing tissue near the fistula 7. A semi-through groove 11 is provided along the length direction of the puncture part. The puncture part has a curvature, and the semi-through groove 11 is located on the inner side of the curved shape of the puncture part. The semi-through groove 11 is used to lead out one end of the flexible element 6 that fixes the implant unit 5 to connect to the adjacent implant unit 5, so as to facilitate the subsequent pulling of the flexible element 6 to tighten all the implant units 5 and complete the tightening of the fistula 7, thereby avoiding the fistula 7 not being fully tightened due to the excessive redundancy of the flexible element, affecting the suture quality and even causing the fistula 7 to be infected; the puncture part has a curvature, which is suitable for suturing in a narrow space. At the same time, during the puncture process, the curvature of the puncture part expands the actual puncture position of the puncture part, which can adapt to the fistula 7 caused by the physiological contraction of the tissue around the fistula 7 and improve the reliability of the suturing.

[0039] like Figure 10 and Figure 11 As shown, the implant unit 5 is fixed to the tissue around the fistula 7, and the implant unit 5 is fixed and connected in series by the flexible element 6. It should be noted that Figure 10The example of attaching the implant unit 5 to the tissue around the fistula 7 is shown. The present invention can be used to suture other fistulas or fix them at different positions of the tissue around the fistula. Figure 11 An embodiment example in which the implant unit 5 is fixed by the flexible element 6 is shown, and the flexible element 6 can be used to fix the implant unit 5 in any other embodiment.

[0040] The purpose of the invention is to realize the use of a suturing device to replace the manual suturing of postoperative perforation in duodenal endoscopy treatment, reduce the operational difficulty of suturing in a narrow space under endoscopy, improve the suturing quality of the fistula 7 in a narrow space, and have the following beneficial effects: simplifying the suturing operation, reducing the operating threshold and labor intensity of the operator; shortening the suturing time of the fistula 7, reducing the discomfort caused to the human body by endoscopic surgery, using a flexible element and an implant unit 5 to achieve entanglement and fixation of the flexible element 6 in vitro, simplifying the steps of the suturing operation, and improving the suturing quality of the fistula 7; and completing the suturing operation of the suture needle repeatedly puncturing the tissue around the fistula 7 through the implant unit 5, avoiding the need to manually manipulate the suture needle and the tissue near the fistula 7 in a narrow space for repeated puncture, reducing the operational difficulty of the suturing operation, and shortening the suturing time of the fistula 7.

[0041] The above embodiments and / or implementation methods are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any form. Any person skilled in the art may make slight changes to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention.

Claims

1. A suturing device for endoscopic treatment of postoperative perforation of the duodenum, comprising a flexible element (6) and a fistula (7), characterized in that: The suturing device comprises at least two implant units (5), each of the implant units (5) is provided with at least two connection holes, the flexible element (6) is connected in series with the connection holes of the implant units (5), the implant units (5) can be fixed around the fistula (7), and the implant units (5) can be fixed on the outside of the duodenum; The suturing device further comprises at least two puncture mechanisms (1), wherein the puncture parts of the puncture mechanisms (1) have a curvature; the puncture mechanisms (1) are distributed in a circumferential manner; The suturing device further comprises at least two puncture fixing units (3), each of the puncture fixing units (3) being matched with each of the puncture mechanisms (1); a first connecting hole (33) is provided on the front surface of the puncture fixing unit (3), and an end of the puncture portion away from the tip is fixed to the first connecting hole (33); The suturing device further comprises an endoscopic inner catheter (4), the outer wall of the endoscopic inner catheter (4) is provided with a second recessed portion (41), the top of the puncture and fixation unit (3) is provided with a second protrusion (32), and the second recessed portion (41) and the second protrusion (32) cooperate with each other; The suturing device further comprises an endoscope outer guide sleeve, the inner wall of the endoscope outer guide sleeve is provided with a first protrusion (21), the bottom surface of the puncture fixing unit (3) is provided with a first recessed portion (31), the first protrusion (21) and the first recessed portion (31) cooperate with each other, the puncture fixing unit (3) rotates relative to the first protrusion (21), and the endoscope inner catheter (4) and the endoscope outer guide sleeve cooperate with each other so that both sides of the puncture mechanism (1) are restricted.

2. A suturing device for duodenal perforation after endoscopic treatment according to claim 1, characterized in that: A first channel is provided inside the puncture mechanism (1), and the first channel extends along the length direction of the puncture mechanism (1). The flexible element (6) and the implant unit (5) can pass through the first channel. The width of the implant unit (5) is smaller than the inner diameter of the first channel, and the distance between the connecting holes of the implant unit (5) is greater than the outer diameter of the puncture mechanism (1).

3. The suturing device for duodenal perforation after endoscopic treatment according to claim 2, characterized in that: The puncture mechanism (1) includes a delivery mechanism (12), which is located inside the first channel and can push the implant unit (5) out of the first channel. A through hole is provided in the length direction of the delivery mechanism (12) to allow the flexible element (6) to pass through.

4. The suturing device for duodenal perforation after endoscopic treatment according to claim 3, characterized in that: The puncture portion is provided with a tip capable of puncturing tissue near the fistula opening (7), and a semi-through groove (11) is provided along the length direction of the puncture portion, and the semi-through groove (11) is located on the inner side of the curved outer shape of the puncture portion.

5. The suturing device for duodenal perforation after endoscopic treatment according to claim 2, characterized in that: Each of the puncture mechanisms (1) is connected in series with an elastic body in a circumferential manner.

6. The suturing device for duodenal perforation after endoscopic treatment according to claim 5, characterized in that: A second connection hole (34) is provided on the side of the puncture and fixation unit (3), and the elastic body passes through the second connection hole (34) to connect each of the puncture and fixation units (3) in series. The puncture and fixation unit (3) is fixed to the elastic body (8), and the elastic body (8) is provided with a notch (81).

7. The suturing device for duodenal perforation after endoscopic treatment according to claim 1, characterized in that: The endoscope inner catheter (4) is provided with a second channel, the second channel extending along the length direction of the endoscope inner catheter (4), and the second channel allows the flexible element (6) to pass through.

8. The suturing device for duodenal perforation after endoscopic treatment according to claim 1, characterized in that: The puncture and fixation units (3) are fan-shaped, and adjacent puncture and fixation units (3) are spaced apart.

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