Suture implantation device and suture

Abstract

The present invention discloses a suture implantation device and suture, wherein the suture implantation device comprises a first body and a second body, the first body is rotatably mounted on the second body, a first push-pull member is arranged at the rear end of the first body, a sleeve portion is arranged at the rear end of the second body, the first push-pull member passes through the sleeve portion, an implantation needle is rotatably mounted at the front end of the first body, an implantation avoidance groove corresponding to the implantation needle is arranged at the front end of the second body, a thread withdrawal portion is arranged in the second body, a second push-pull member for moving the thread withdrawal portion is arranged in the second body, the second push-pull member passes through the sleeve portion, and the implantation needle is provided with a thread withdrawal groove, which is arranged along the length direction of the implantation needle. The suture implantation device in the present invention can effectively implement the implantation of sutures into target mucosal tissues under endoscopy, and the thread withdrawal portion can realize the function of pushing the sutures out of the implantation needle, and the present invention can be widely used in the field of medical device technology.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a suture implantation device and a suture. Background Art

[0002] With the development of endoscopic technology, endoscopic minimally invasive surgery can treat more and more gastrointestinal diseases, such as early gastrointestinal cancer resection, fistula closure, mucosal defect repair and hemostasis. In the process of endoscopic surgical treatment, wound closure endoscopic accessories are indispensable surgical tools. At present, commonly used accessories include endoscopic clips, nylon ropes and gastrointestinal closure devices OTSC (over the scope closure) anastomotic clips. These tools have limitations. Endoscopic clips are difficult to close large wounds, the strength of closure is limited, and for intra-abdominal surgery, endoscopic clips cannot be absorbed and will remain in the human body for a long time; nylon rope combined with endoscopic clip purse string suture is inflexible and time-consuming to operate, especially for difficult operating parts; OTSC is an imported instrument with high cost of use, needs to be installed when used, cannot be used directly through the endoscope working channel, is inconvenient, and the anastomotic clip is large in size and will remain in the human body for a long time. Different from the above methods, the suturing method using sutures can make up for the shortcomings of the above methods. However, in order to achieve suture suturing, there is a lack of suture implantation devices under soft endoscopes. Therefore, the research and development of suture implantation devices is of great significance. Summary of the invention

[0003] In order to solve at least one of the above technical problems and effectively implant sutures, the present invention provides a suture implantation device and a suture.

[0004] The technical solutions adopted are as follows:

[0005] A first aspect of an embodiment of the present invention provides a suture implantation device. The implantation device includes a first body and a second body, the first body is rotatably mounted on the second body, the rotation axis of the first body is perpendicular to the length direction of the second body, a first push-pull member is arranged at the rear end of the first body, a sleeve portion is arranged at the rear end of the second body, the first push-pull member passes through the sleeve portion, an implantation needle is rotatably mounted at the front end of the first body, an implantation avoidance groove corresponding to the implantation needle is arranged at the front end of the second body, a thread withdrawal portion is arranged in the second body, a second push-pull member is arranged on the second body for moving the thread withdrawal portion, the second push-pull member passes through the sleeve portion, the implantation needle is provided with a thread withdrawal groove, and the thread withdrawal groove is arranged along the length direction of the implantation needle.

[0006] In some embodiments, the rear portion of the second body is a cylindrical structure, and the side wall of the cylindrical structure has a rear slot for the rear portion of the first body to move in and out when rotating. The front portion of the second body has a stopper arranged along the long axis direction.

[0007] In some embodiments, there is a gap between the two blocking members, the gap is arranged along the length direction of the second body, and the blocking members and the outer wall of the front portion of the second body form a sliding slot.

[0008] In some embodiments, a sliding member is disposed in the second body, the wire withdrawal portion and the second push-pull member are disposed on the sliding member, and the sliding member can move along the sliding slot.

[0009] In some embodiments, a side of the sliding member facing the implant needle is provided with a receiving portion for the implant needle tip to abut against.

[0010] In some embodiments, the receiving portion is provided with a first guide groove along the length direction of the sliding member, and a receiving end wall is provided at one end of the first guide groove close to the front end of the sliding member.

[0011] In some embodiments, a third avoidance groove corresponding to the first body is provided at the rear end of the sliding member.

[0012] In some embodiments, a receiving portion for the implant needle tip to abut is provided on one side of the retaining member facing the implant needle, and a limiting guide portion is provided on the other side of the retaining member for the wire withdrawal portion to pass through.

[0013] In some embodiments, the receiving portion is a second guide groove along the length direction of the retaining member.

[0014] In some embodiments, the limiting guide portion is a guide channel along the length direction of the blocking member.

[0015] In some embodiments, the front end of the second body is provided with two supporting tips, the implantation needle passes through between the two supporting tips, and the direction of the supporting tips is opposite to the direction in which the implantation needle passes through the tissue.

[0016] In some embodiments, the wire withdrawal groove has an opening extending from the side wall or the front end of the implant needle at one end close to the needle tip of the implant needle.

[0017] In some embodiments, a hook portion is provided on the top of the wire withdrawal portion, and the wire withdrawal portion and the hook portion can pass through a wire withdrawal groove.

[0018] In some embodiments, a limiting protrusion is provided on one of the side walls of the wire withdrawal groove.

[0019] In some embodiments, the rear end of the implant needle is mounted on the front end of the first body via a first rotating shaft.

[0020] In some embodiments, the first rotating shaft is sleeved with an elastic member.

[0021] In some embodiments, the implantation needle is connected to a powered guide wire, one end of the powered guide wire is connected to the implantation needle, and the other end is connected to a handle.

[0022] In some embodiments, the implantation needle is a hollow tubular structure, and the inner cavity of the implantation needle can accommodate a suture with a limiting portion.

[0023] A second aspect of an embodiment of the present invention provides a suture thread. The suture thread comprises a thread body, a front limit portion, a rear limit portion and a fixed limit portion, wherein the front limit portion and the rear limit portion can move along the thread body, a loop structure for pulling is provided at one end of the thread body, and the fixed limit portion is located at the other end of the thread body.

[0024] Compared with the prior art, the embodiments of the present invention have at least the following beneficial effects: through the structural arrangement of the first body, the second body, the implantation needle and the thread withdrawal portion, the implantation device can effectively implant the suture into the target mucosal tissue under a flexible endoscope, providing strong support for further suturing. The present invention can be widely used in the field of medical device technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of the first embodiment of the suture;

[0026] Figure 2 It is a structural diagram of the second embodiment of the suture line;

[0027] Figure 3 This is a structural diagram of the implant device embodiment 1 when closed;

[0028] Figure 4 This is a structural diagram of the implant device embodiment 1 when it is opened;

[0029] Figure 5 This is a structural diagram of the implant device embodiment 1 when it is opened;

[0030] Figure 6 This is a structural diagram of the implant device embodiment 1 after puncturing tissue;

[0031] Figure 7 This is a structural diagram of the implantation needle in the first embodiment of the implantation device when it exits the implantation avoidance groove;

[0032] Figure 8 for Figure 7 Partial view of area A in the middle;

[0033] Fig. 9 This is a structural diagram of the implantation needle in the first embodiment of the implantation device, in which the second avoidance groove for the torsion spring to pass through is not provided at the rear end of the implantation needle;

[0034] Fig.10 This is a structural diagram of the implantation needle in the first embodiment of the implantation device, in which the structure is not provided with a second avoidance groove for the torsion spring to pass through;

[0035] Fig.11 This is a structural diagram of the implantation needle in the first embodiment of the implantation device, in which the structure is not provided with a second avoidance groove for the torsion spring to pass through;

[0036] Fig.12 This is a structural diagram of an implantation needle in Embodiment 1 of the implantation device, in which a second avoidance groove for the torsion spring to pass through is provided at the rear end of the implantation needle;

[0037] Fig.13 This is a structural diagram of the implantation needle in the implantation device embodiment 1 when the implantation needle is equipped with the suture thread embodiment 1;

[0038] Fig.14 is a structural diagram of the second entity;

[0039] Fig.15 is a structural diagram of the second entity;

[0040] Fig.16 for Fig.15 Partial view of the middle C area;

[0041] Fig.17 is a structural diagram of the first entity;

[0042] Fig.18 This is the structural diagram of the handle;

[0043] Fig.19 This is a structural exploded view of the handle;

[0044] Fig. 20 This is a state diagram of the suture embodiment 1 after being implanted into two target mucosal tissues;

[0045] Fig.21 This is a state diagram of the suture embodiment 1 after being implanted into a target mucosal tissue;

[0046] Fig. 22 This is a structural diagram of the implant device embodiment 2 when closed;

[0047] Fig.23 This is a structural diagram of the implant device embodiment 2 when it is opened;

[0048] Fig.24 This is a structural diagram of the implant device embodiment 2 when it is opened;

[0049] Fig.25This is a structural diagram of the implant device embodiment 2 after the implant needle punctures the tissue;

[0050] Fig.26 It is a structural diagram of the implantation needle in the second embodiment of the implantation device when it exits the implantation avoidance groove;

[0051] Fig. 27 for Fig.26 Partial view of area B in the middle;

[0052] Fig.28 This is a structural diagram of the implantation needle in the second embodiment of the implantation device, in which the structure is not provided with a second avoidance groove for the torsion spring to pass through;

[0053] Fig.29 This is a structural diagram of the implantation needle in the second embodiment of the implantation device, in which the structure is not provided with a second avoidance groove for the torsion spring to pass through;

[0054] Fig.30 This is a structural diagram of the implantation needle in the second embodiment of the implantation device, in which the structure is not provided with a second avoidance groove for the torsion spring to pass through;

[0055] Fig.31 This is a structural diagram of an implantation needle in Embodiment 2 of the implantation device, in which a second avoidance groove for the torsion spring to pass through is provided at the rear end of the implantation needle;

[0056] Fig.32 It is a structural diagram of the implantation needle in the second embodiment of the implantation device equipped with the second embodiment of the suture;

[0057] Fig.33 It is a structural exploded view of the second embodiment of the implant device;

[0058] Fig.34 It is a structural diagram of the sliding member in the first embodiment and the second embodiment of the implant device;

[0059] Fig.35 It is a structural diagram of the sliding member in the first embodiment and the second embodiment of the implant device;

[0060] Fig.36 This is a state diagram of suture embodiment 2 after being continuously implanted into multiple target mucosal tissues;

[0061] Fig.37 This is a structural diagram of the implant device embodiment 3 when closed;

[0062] Fig.38 for Fig.37 Partial view of area D in the middle;

[0063] Fig.39 This is a structural diagram of the implant device embodiment 3 when it is opened;

[0064] Fig.40 This is a structural diagram of the implant device embodiment 3 when it is opened;

[0065] Fig.41 for Fig.40 Partial view of area E in the middle;

[0066] Fig.42 This is a structural diagram of the second body in Embodiment 3 of the implant device;

[0067] Fig.43 for Fig.42 Partial view of area F in the middle;

[0068] Fig.44 This is a structural diagram of the implantation needle in the implantation device embodiment 3 when entering the implantation avoidance groove;

[0069] Fig.45 This is a structural diagram of the implantation needle in the implantation device embodiment 3 when entering the implantation avoidance groove;

[0070] Fig.46 for Fig.45 Partial view of the middle G area;

[0071] Fig.47 This is a structural diagram of the implantation needle in the implantation device embodiment 3 when it exits the implantation avoidance groove;

[0072] Fig.48 for Fig.47 Partial view of the middle H area;

[0073] Fig.49 This is a structural diagram of the implantation needle in the fourth embodiment of the implantation device when it exits the implantation avoidance groove;

[0074] Fig.50 for Fig.49 Partial view of the middle I area;

[0075] Fig.51 This is a structural exploded view of the fourth embodiment of the implant device.

[0076] Reference numerals: 101, wire body; 102, front limiting portion; 103, rear limiting portion; 104, ring-shaped structure; 105, fixed limiting portion; 201, first body; 202, second body; 203, first push-pull member; 204, sleeve portion; 205, second push-pull member; 206, implantation needle; 207, implantation avoidance groove; 208, wire withdrawal portion; 209, wire withdrawal groove; 210, rear slot; 211, blocking member; 212, sliding member; 213. First guide groove; 214. Storage end wall; 215. Third avoidance groove; 216. Guide channel; 217. Support tip; 218. Shielding portion; 219. Opening; 220. Hook; 221. Limiting protrusion; 222. Elastic member; 223. First baffle; 224. Power-carrying guide wire; 225. Handle; 226. Control ring; 227. Second guide groove; 228. Through opening; 229. Second avoidance groove; 230. Hollow tube. DETAILED DESCRIPTION

[0077] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and are not to be construed as limitations on the present application. Unless otherwise specified, similar reference numerals represent similar items. Therefore, if a feature has been defined or explained in the embodiments of the previous drawings, it does not need to be further defined or explained in the subsequent drawings.

[0078] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "inside", "outside", "center", "vertical" and "horizontal" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0079] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection and a movable connection, a detachable connection and a non-detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication. "Fixed connection" includes detachable connection, non-detachable connection, and integral connection, etc.

[0080] In this application, terms such as "first" or "second" are used for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0081] Combine the following Figures 1 to 51 The present invention is further described.

[0082] The suture implantation device and the suture used therewith in the present application are instruments and tools for suture surgery and other related medical operations, and are particularly suitable for suture surgery under endoscopy.

[0083] The following text will describe the sutures used in the suture implantation device.

[0084] Suture Example 1:

[0085] like Figure 1 The suture line includes a line body 101, a front limiting portion 102, a rear limiting portion 103 and a fixed limiting portion 105. A loop structure 104 for pulling is provided at one end of the line body 101, and the fixed limiting portion 105 is arranged at the other end. The rear limiting portion 103 is close to the loop structure 104, and the front limiting portion 102 and the rear limiting portion 103 can move along the line body 101. The fixed limiting portion 105 limits the slipping of the front limiting portion 102 and the rear limiting portion 103. A large friction force is set between the rear limiting portion 103 and the line body 101, which ensures that the rear limiting portion 103 is not easily pushed away, thereby increasing the firmness of the suture. After the suture is implanted into the target mucosal tissue, the corresponding suturing device hooks and pulls the loop structure 104 of the thread body 101 and pushes the rear limiter 103 along the thread body 101, squeezing the rear limiter 103 and the front limiter 102 together to achieve suturing of the target mucosal tissue. The suture is applied to the hollow tubular implantation needle 206.

[0086] Suture Example 2:

[0087] like Figure 2 In this embodiment, the suture includes a thread body 101, and loop structures 104 for pulling are provided at both ends of the thread body 101. The suture is not provided with a limiting portion, has a simple structure, and can achieve continuous implantation of the suture. It should be noted that the suture is not limited to the application in the hollow tubular implantation needle 206.

[0088] The following is a description of the structure of the suture implantation device:

[0089] See also Figures 3 to 51The suture implantation device shown. The implantation device comprises a first body 201 and a second body 202, wherein the first body 201 is rotatably mounted on the second body 202, the rotation axis of the first body 201 being perpendicular to the length direction of the second body 202, and an implantation needle 206 being rotatably mounted on the front end of the first body 201. In the initial state, the first body 201 is rotated to a position close to the second body 202 in a closed state, at which time the implantation needle 206 is close to the first body 201 in a closed state, the implantation device is extended into the patient's body, the first body 201 is rotated to a cross position with the second body 202, the implantation needle 206 is opened to a position vertical or nearly vertical relative to the first body 201, the target mucosal tissue is between the tip of the implantation needle 206 and the front end of the second body 202, the first body 201 is rotated, the implantation needle 206 passes through the target mucosal tissue, and the first body 201 is rotated in the opposite direction to withdraw the implantation needle 206 from the target mucosal tissue.

[0090] The implant device can rotate around the axis, so as to realize the opening and closing of the first body 201 and the implant needle 206. The implant device after closing is smaller in size, so it can pass through the narrow working channel of the endoscope, which is convenient for the implementation of suture thread implantation; when entering the human body to implement suturing, the first body 201 and the implant needle 206 are opened, and the force is transmitted to the implant needle 206 through the rotation of the first body 201, so that the implant needle 206 can penetrate the target mucosal tissue.

[0091] The implantation needle 206 is connected to a powered guide wire 224, and an insulating layer is arranged around the powered guide wire 224. It is understandable that the insulating layer may be an insulating coating or a thin tube on the surface of the guide wire. The insulating layer separates the powered guide wire 224 from adjacent components, which prevents the guide wire from interfering with the operation of the first push-pull member 203 and the second push-pull member 205 during the power-on process. The powered guide wire 224 is connected to the power-on interface of the handle 225. The external endoscope high-frequency electrical device transmits high-frequency electricity to the implantation needle 206 through the powered guide wire 224, which helps the implantation needle 206 to puncture the target mucosal tissue. For target mucosal tissues with thicker size and harder texture, power-on assists the implantation needle 206 in puncturing, which can improve the success rate of puncture.

[0092] In some embodiments, in addition to energizing to assist the implant 206 in puncturing, the energized guide wire 224 is connected to the implant needle at one end and to the handle at the other end, and can also assist in the folding, merging and opening of the implant needle 206. A first baffle 223 is provided at the front end of the first body 201. After the implant needle 206 is rotated and opened relative to the first body 201, the first baffle 223 abuts against the side wall of the rear end of the implant needle 206. The first baffle 223 prevents the implant needle 206 from being excessively opened, and fixes the opened state of the implant needle 206 in a direction perpendicular to the first body 201, which is conducive to puncturing tissue.

[0093] The front part of the first body 201 is provided with an inner arc wall, and the inner side of the inner arc wall is used to receive the implantation needle 206 that is rotated and retracted relative to the first body 201. After closing, the inner arc wall can shield the implantation needle 206. The setting of the inner arc wall structure avoids the implantation needle 206 from piercing the surrounding mucosal tissue after the implantation needle 206 is retracted and facilitates the removal of the implantation device from the working channel of the endoscope. It can be understood that in order to achieve the above-mentioned effect, the front part of the first body may not adopt the structural design of the inner arc wall.

[0094] The first body 201 has a first push-pull member 203 disposed at the rear end thereof. The first push-pull member 203 is a steel wire and is pushed forward or pulled backward to rotate the first body 201. The second body 202 has a sleeve portion 204 disposed at the rear end thereof. The first push-pull member 203 passes through the sleeve portion 204.

[0095] In some embodiments, the rear end of the implant needle 206 is mounted on the front end of the first body 201 via a first rotating shaft. The rotating shaft connection ensures the flexibility of opening and closing the implant needle 206, which is simple and quick. An elastic member 222 is provided on the first rotating shaft. It is understandable that the elastic member 222 can be a torsion spring or other forms of springs, or can be an element that has elasticity itself. During implementation, the torsion spring can bounce the implant needle 206 away, and play a certain supporting role on the bounced implant needle 206, thereby preventing the implant needle 206 from being squeezed and retracted during the puncture process.

[0096] In some embodiments, a second avoidance groove 229 is formed on the side wall of the rear end of the hollow implant needle 206 corresponding to the torsion spring. The avoidance groove provides space for the installation of the torsion spring, and a larger torsion spring can be installed, which is convenient for processing and manufacturing.

[0097] The end of the withdrawal groove 209 near the needle tip arranged along the length direction of the implant needle 206 extends from the side wall or front end of the implant needle 206 to form an opening 219, so that the suture embodiment 2 can be pushed out from the opening 219 by the withdrawal part 208. The position of the opening 219 is not limited to the side wall.

[0098] A limiting protrusion 221 is provided on one of the side walls of the thread withdrawal groove 209, and the limiting protrusion 221 limits the suture from moving from the position of the limiting protrusion 221 into the rear end of the implant needle 206 without limiting the movement of the thread withdrawal portion 208 in the thread withdrawal groove 209. The setting of the limiting protrusion 221 ensures that after the thread withdrawal portion 208 passes through the thread withdrawal groove 209 of the implant needle 206, the suture is always located at the outer section of the thread withdrawal portion 208, so that the thread withdrawal portion 208 can prevent the suture from exiting the tissue along with the implant needle 206. The size of the thread withdrawal portion 208 is set smaller than the width of the thread withdrawal groove 209, and can move relative to the implant needle 206 within the entire range of the thread withdrawal groove 209. With the above structural setting, the suture can be pushed out of the thread withdrawal groove 209 and implanted into the target mucosal tissue. A hook portion 220 is provided on the top of the thread withdrawal portion 208, and both can pass through the thread withdrawal groove 209. The hook portion 220 of the thread withdrawal portion 208 can hook and pull the loop structure 104 of the suture thread, and can pull the suture thread into the thread withdrawal groove 209 to assist the suture thread to be assembled to the implantation needle 206 .

[0099] The front end of the second body 202 is provided with an implant avoidance groove 207 corresponding to the implant needle 206. The avoidance groove 207 prevents the front end of the second body 202 from hindering the implant needle 206 from passing through the target mucosal tissue. In some embodiments, the implant avoidance groove 207 is formed by the gap at the distal ends of the two stoppers 211 and the notch of the outer layer wall at the distal end of the second body 202; in some embodiments, the implant avoidance groove 207 is formed by the stopper 211 partially extending toward the distal end along the length direction of the second body 202. A wire withdrawal portion 208 is provided in the second body 202, and a second push-pull member 205 for moving the wire withdrawal portion 208 is provided. The second push-pull member 205 passes through the sleeve portion 204, and the second push-pull member 205 is pushed forward or pulled backward to move the wire withdrawal portion 208 accordingly. The second push-pull member 205 is an elastic steel wire or a push rod. The sleeve portion 204 has the function of receiving and converging the first push-pull member 203 and the second push-pull member 205, and the rear end of the sleeve portion 204 is connected to the handle 225. Two hollow tubes 230 are arranged in the sleeve portion 204 for the first push-pull member 203 and the second push-pull member 205 to pass through respectively, and the hollow tubes 230 can reduce the mutual interference between the push-pull members. The first push-pull member 203 and the second push-pull member 205 are respectively connected to the control ring 226 of the handle 225.

[0100] The front end of the second body 202 is provided with two support tips 217, and the implantation needle 206 passes through the two support tips 217, and the direction of the support tips 217 is opposite to the direction in which the implantation needle 206 passes through the tissue. The two support tips 217 are used to press against the target mucosal tissue for puncture, so as to prevent the tissue from slipping when the implantation needle 206 punctures. It can be understood that the two support tips 217 and the second body 202 can be integrally formed or connected to each other.

[0101] The middle position of the line connecting the two support tips 217 is located on the arc track of the needle tip of the implant needle 206 when the first body 201 rotates. When the implant needle 206 punctures the target mucosal tissue, the needle tip of the implant needle 206 and the two support tips 217 are respectively located at corresponding positions on both sides of the tissue, and the needle tip passes through the middle of the two support tips 217, which can maximize the force of the implant needle 206 passing through the target mucosal tissue.

[0102] The front end of the first body 201 is provided with a shielding portion 218 opposite to the supporting tip 217. When the implant device is in a closed state, the shielding portion 218 is in a relative position to the two supporting tips 217 of the second body 202. The shielding portion 218 prevents the supporting tips 217 from scratching tissue when extending into the body. Furthermore, the front end of the shielding portion 218 is passivated.

[0103] The rear part of the second body 202 is cylindrical, and the side wall is provided with a slot 210 for the rear part of the first body 201 to enter and exit when rotating, and the rear slot 210 is arranged along the length direction of the second body 202. The front part of the second body is provided with a stopper 211. The second body 202 can be machined, bent, assembled and formed, or can be integrally formed by metal casting or 3D printing.

[0104] In some embodiments, the front portion of the second body 202 has a partial side wall of a cylindrical structure. Specifically, the side wall of the front portion of the second body 202 is split along its length direction, with one portion retained and the other portion cut off, forming a cylindrical structure with a partial side wall. This portion of the side wall is folded inward and surrounds the opposite cylindrical wall to form a sliding slot. The folded side wall is provided with two retaining members 211, with a gap therebetween. The retaining members 211 can extend toward the distal end of the second body 202 and bend laterally to form two supporting tips 217. The gap at the distal end of the two retaining members 211 and the notch in the outer cylindrical wall at the distal end of the second body 202 together form an implant avoidance groove 207. The retaining member 211 and the two supporting tips 217 at the front portion of the second body 202 are not limited to the above-mentioned molding methods, and can also be machined and welded, integrally molded by metal castings, or 3D printed.

[0105] The stopper 211 provides support for the target mucosal tissue to facilitate the insertion of the implant needle 206, stops and limits the rotation of the front of the first body 201 to prevent excessive rotation, and blocks the implant needle 206 after the implant needle 206 is retracted to prevent the implant needle 206 from automatically popping open. The stopper 211 and the outer wall of the front of the second body 202 form a sliding slot.

[0106] In some embodiments, a sliding member 212 is provided in the second body 202, and the wire withdrawal portion 208 and the second push-pull member 205 are provided on the sliding member 212 along the length direction. The two side edges of the sliding member 212 are in contact with the inner wall of the sliding slot, which plays a limiting role, ensuring that the sliding member 212 moves along the sliding slot, and driving the wire withdrawal portion 208 to accurately pass through the wire withdrawal slot 209. The side of the sliding member 212 facing the implantation needle 206 is provided with a receiving portion for the needle tip of the implantation needle 206 to abut against, so as to assist the implantation needle 206 in closing.

[0107] In some embodiments, the receiving portion of the sliding member 212 is a first guide groove 213 along the length direction of the sliding member, and a receiving end wall 214 is provided at one end of the first guide groove 213 close to the front end of the sliding member 212. A third avoidance groove 215 corresponding to the rear portion of the first body 201 is provided at the rear end of the sliding member 212, which avoids mutual interference between the sliding member 212 and the rear portion of the first body 201 during their respective movements.

[0108] In some embodiments, a receiving portion for the needle tip of the implant needle 206 is provided on one side of the stopper 211 facing the implant needle 206 to assist the implant needle 206 in closing and closing, and a limiting guide portion is provided on the other side to play a limiting role, ensuring that the wire withdrawal portion 208 accurately passes through the wire withdrawal groove 209. In some embodiments, the receiving portion of the stopper 211 is set as a second guide groove 227 along the length direction of the stopper 211, and the limiting guide portion is set as a guide channel 216 along the length direction of the stopper 211. The side of the stopper 211 provides support for the target mucosal tissue to facilitate the implant needle 206 to pass through, blocks and limits the rotation of the front part of the first body 201 to prevent excessive rotation, and blocks the implant needle 206 after the implant needle 206 is closed to prevent the implant needle 206 from automatically popping open. In some embodiments, the stopper 211 has a blocking effect, and also has the functions of assisting the closing of the implant needle 206 and limiting and guiding the wire withdrawal portion 208.

[0109] It should be noted that various changes, modifications, substitutions and variations may be made to the above embodiments without departing from the principles and purposes of the present application. Therefore, the structure of the implant device is not limited to the four modes that will be described below.

[0110] The following text will describe four typical implementations of the implant device of the present invention in conjunction with the accompanying drawings.

[0111] Suture implantation device embodiment 1:

[0112] The suture used in the implantation device in this embodiment is the suture embodiment 1, such as Fig.13The implantation needle 206 is a hollow tubular structure in which the three limiting parts of the suture can be placed. The front end of the implantation needle 206 has a through opening 228 to facilitate the withdrawal part 208 to push the limiting parts of the suture out of the withdrawal groove 209 from the through opening 228.

[0113] like Figures 4 to 8 , Figures 14 to 16 The front part of the second body 202 has a stopper 211 arranged along the long axis direction, and there is a gap between the two stoppers 211, and the gap is arranged along the length direction of the second body 202. The stopper 211 and the outer wall of the front part of the second body 202 form a sliding slot, and the sliding slot is arranged along the length direction of the second body 202. The second body 202 is provided with a sliding member 212, and the wire withdrawal part 208 and the second push-pull member 205 are arranged on the sliding member 212. The wire withdrawal part 208 is arranged at the front end of the sliding member 212, and the second push-pull member 205 is arranged at the rear end of the sliding member 212. The sliding member 212 can move along the sliding slot. After the implantation needle 206 passes through the target mucosal tissue, the first body 201 and the second body 202 are brought together to be in a nearly closed state, the sliding member 212 is pushed forward, the thread withdrawal portion 208 passes through the thread withdrawal groove 209, and the first body 201 rotates in the opposite direction to gradually separate from the second body 202. The suture thread in the implantation needle 206 is blocked by the thread withdrawal portion 208 and is pushed out of the implantation needle 206.

[0114] The sliding member 212 also has the function of rotating and closing the implant needle 206 relative to the first body 201. The tip of the implant needle 206 abuts against the storage portion of the sliding member 212. The sliding member 212 has a friction force or a force on the tip of the implant needle 206, so that the sliding member 212 moves backward. At the same time, the first body 201 rotates relative to the second body 202 in the direction of closing together. The movement of the sliding member 212 exerts a force on the tip of the implant needle 206, so that the implant needle 206 rotates relative to the first body 201 in the direction of closing together, thereby completing the merging and closing of the implant needle 206 to the first body 201 and the closing of the first body 201 to the second body 202. In this way, the implant needle 206 can be closed and the implant device can be smoothly removed from the human body.

[0115] like Figure 8 , Fig.34 and Fig.35 The receiving portion of the sliding member 212 is provided as a first guide groove 213 along the length direction of the sliding member 212, and a receiving end wall 214 is provided at one end of the first guide groove 213 close to the front end of the sliding member 212. The tip of the implanting needle 206 abuts against the bottom of the first guide groove 213, and when the sliding member 212 moves backward, the receiving end wall 214 abuts against the tip of the implanting needle 206 to bring it close to the first body 201.

[0116] The sliding member 212 realizes the closing of the implant needle 206, reduces the additional closing device of the implant needle 206, and simplifies the structure. The sliding member 212 fits with the inner wall of the sliding slot, ensures the accuracy of the moving direction, and improves the accuracy of the withdrawal part 208 passing through the withdrawal slot 209 of the implant needle 206.

[0117] The rear end of the sliding member 212 is provided with a third avoidance groove 215 corresponding to the first body 201 to prevent the rear end of the sliding member 212 from hindering the rotation of the rear part of the first body 201 at the middle position of the second body 202 .

[0118] The implantation device can achieve suturing similar to surgical operation by setting the implantation needle 206, and implant the suture into the tissue that needs suturing, thereby providing strong support for achieving suturing with the same effect as surgical suture.

[0119] The specific operation process of the implantation device in this embodiment is as follows:

[0120] 1. Assemble the suture to the implantation needle 206 and then deliver the implantation device into the human body.

[0121] like Fig.13 Before implementation, the suture is assembled to the implantation needle 206 in vitro, and the limiting parts of the suture are inserted into the lumen of the implantation needle 206 from the rear of the withdrawal groove 209 in sequence, and the two limiting parts are placed in the order of the rear limiting part 103 at the rear and the front limiting part 102 at the front. After assembly, the implantation needle 206 is retracted, and the implantation device is inserted into the human body through the working channel of the endoscope and reaches the target mucosal tissue to be implanted with the suture.

[0122] 2. Open the implant needle 206.

[0123] like Figure 4 and Figure 5 , the control ring 226 of the handle 225 pushes the first push-pull member 203 to drive the first body 201 to open, and at the same time, pushes the second push-pull member 205 to drive the sliding member 212 to move distally in the sliding slot, so that the implantation needle 206 is bounced open by the torsion spring. The first baffle 223 at the distal end of the first body 201 abuts against the side wall of the rear end of the implantation needle 206 that is bounced open, limiting its excessive opening, and the fully opened implantation needle 206 is at a right angle to the front of the first body 201.

[0124] 3. The implant needle 206 punctures the target mucosal tissue.

[0125] like Figure 6After the implantation needle 206 is fully opened, the position of the implantation device is adjusted, and the target mucosal tissue to be implanted with sutures is placed between the tip of the implantation needle 206 and the support tip 217 and the stopper 211 at the front end of the second body 202, and the implantation needle 206 is ensured to pass through the middle of the two support tips 217 on the rotating arc trajectory, so that the support tip 217 provides the maximum support and fixes the target mucosal tissue, so that the implantation needle 206 can smoothly penetrate the tissue. Further, the first push-pull member 203 is pulled by the control ring 226 of the handle 225 to drive the first body 201 close to the second body 202, thereby driving the implantation needle 206 to pierce the target mucosal tissue until the target mucosal tissue is penetrated. For thick target mucosal tissue and hard tissue, when the implantation needle 206 punctures, it can be powered on to assist the puncture, and the power-on interface of the handle 225 is connected to the high-frequency electric device of the endoscope. The current passes through the power-on guide wire 224 to make the tip of the implantation needle 206 conductive, thereby enhancing the force of puncture.

[0126] 4. The suture is released from the implantation needle 206 and the implantation needle 206 is retracted.

[0127] like Figure 7 and Figure 8 After the implantation needle 206 penetrates the suture tissue, continue to pull the first push-pull member 203 to drive the front of the first body 201 close to the blocking member 211 of the front of the second body 202 until the two resist each other and cannot continue to rotate. Then, by pushing the second push-pull member 205, the sliding member 212 is driven to move in the sliding slot, thereby driving the thread withdrawal portion 208 to pass through the rear end of the thread withdrawal slot 209. The sliding slot has a limited guiding effect on the movement of the sliding member 212, ensuring that the thread withdrawal portion 208 accurately passes through the thread withdrawal slot 209. Further, the control ring 226 of the handle 225 pushes the first push-pull member 203 to drive the front of the first body 201 to open, driving the implantation needle 206 to gradually withdraw from the penetrated target mucosal tissue. At the same time, the suture thread limiting portion located in the needle tube of the implantation needle 206 will withdraw with the implantation needle 206. During the retraction process of the implant needle 206, the thread withdrawal portion 208 passing through the thread withdrawal groove 209 of the implant needle 206 blocks the path for the suture thread limiting portion to retreat, thereby gradually pushing the suture thread limiting portion out of the needle tube of the implant needle 206 from the opening 228. After pushing out the front limiting portion 102 located in the needle tube of the implant needle 206, the second push-pull member 205 is pulled by the control ring 226 of the handle 225 to drive the thread withdrawal portion 208 to withdraw from the thread withdrawal groove 209 without blocking the rear limiting portion 103 of the needle tube of the implant needle 206, so that the rear limiting portion 103 remains in the needle tube of the implant needle 206 and withdraws from the penetrated target mucosal tissue together with the implant needle 206.

[0128] Next, after the implantation needle 206 is completely retracted, a portion of the suture thread body 101 and a rear stopper 103 located in the needle tube of the implantation needle 206 still remain in the needle tube of the implantation needle 206. According to the specific requirements for suture thread implantation during endoscopic surgery, the following two methods can be selected to release the thread body 101 and the rear stopper 103 remaining in the needle tube of the implantation needle 206:

[0129] First, after the implantation needle 206 is completely withdrawn from the target mucosal tissue penetrated, the remaining limiter is pushed out according to the above-mentioned operation method of "releasing the suture from the implantation needle 206 and withdrawing the implantation needle 206". Finally, the front limiter 102 and the rear limiter 103 of the suture are respectively located on the two sides of the same target mucosal tissue penetrated, such as Fig.21 .

[0130] The second method is to puncture another target mucosal tissue after the implantation needle 206 is completely withdrawn from the penetrated target mucosal tissue and implant the thread body 101 and the rear stopper 103 of the suture thread retained in the needle tube of the implantation needle 206 into another target mucosal tissue, such as Fig. 20 The implementation method is the same as the above-mentioned "steps 2 to 4" process.

[0131] How to perform suturing after the suture is implanted into the target mucosal tissue. This implementation requires the aid of a corresponding suturing device. The ring structure 104 at one end of the suture is hooked by a corresponding auxiliary device, and the rear limiting portion 103 is pulled and pushed under external force to squeeze the front limiting portion 102 and the rear limiting portion 103 together, thereby squeezing the target mucosal tissue between the front limiting portion 102 and the rear limiting portion 103 together, thereby achieving the purpose of suturing and repairing the defective target mucosal tissue. There is a large frictional resistance between the rear limiting portion 103 and the line body 101 of the suture, which is not easy to loosen, and can play a good limiting role, providing a guarantee for reliable suturing.

[0132] 5. After completing the implantation of one suture, remove the implantation device.

[0133] The control ring 226 of the handle 225 pushes the second push-pull member 205 to drive the sliding member 212 to move toward the distal end of the second body 202 until the sliding member 212 covers the clearance groove behind the support tip 217 at the front end of the second body 202, and then pulls the first push-pull member 203 to drive the first body 201, driving the implantation needle 206 to approach the support tip 217 at the front end of the second body 202, until the tip of the implantation needle 206 hits the first guide groove 213 of the sliding member 212. Further, pull back the second push-pull member 205 to drive the sliding member 212 to move toward the rear of the second body 202, thereby driving the implantation needle 206 to retract. At the same time, continue to pull the first push-pull member 203 to drive the first body 201 to approach the front of the second body 202 until the implantation needle 206 is completely retracted. The tip of the folded implant needle 206 is housed in the inner arc wall at the front of the first body 201, and the shielding portion 218 at the front end of the first body 201 blocks the supporting tip 217 at the front end of the second body 202, which ensures that the implant device does not scratch the human mucosal tissue and can be safely removed.

[0134] Suture implantation device embodiment 2:

[0135] The suture used in the implant device in this embodiment is the suture embodiment 2, such as Fig.32 .

[0136] The end of the thread withdrawal groove 209 near the needle tip of the implant needle 206 extends from the side wall or the front end of the implant needle 206 to form an opening 219, and a hook 220 is provided on the top of the thread withdrawal portion 208. The thread withdrawal portion 208 and the hook 220 can pass through the thread withdrawal groove 209. The thread withdrawal portion 208 pushes the suture thread out of the thread withdrawal groove 209 from the opening 219.

[0137] The implementation process of the implantation device is different from that of the implantation device embodiment 1 in that: first, the method of assembling the suture to the implantation needle 206 is different; second, in vivo, after the suture is completely pushed out of the withdrawal groove 209 of the implantation needle 206, the device can reassemble the suture to the implantation needle 206 to implant the suture to the next target mucosal tissue, which also ensures that the device can perform multiple suture implantation operations on two or more target mucosal tissues. Sutures are continuously implanted into multiple target mucosal tissues, such as Fig.36 .

[0138] The specific operation process of the implant device of this embodiment is as follows:

[0139] The suture is assembled to the withdrawal groove 209 of the implant needle 206. The suture is placed through the withdrawal groove 209 of the implant needle 206 and is located at the distal end of the limiting protrusion 221 of the withdrawal groove 209, which limits the suture from moving backward along the withdrawal groove 209 during the implant needle 206 puncturing the tissue, thereby preventing the suture from blocking the withdrawal portion 208 from passing through the withdrawal groove 209.

[0140] In this embodiment, the basic operating steps of the implementation method of "how to deliver the implant device into the human body", "open the implant needle 206", "the implant needle 206 punctures and sutures the mucosa" and "releases the suture from the implant needle 206 and retracts the implant needle 206" are the same as those in Example 1.

[0141] In this embodiment, after the suture is implanted into the target mucosal tissue to be sutured at one place through the above steps, the suture has been completely released from the thread withdrawal groove 209. Further, the suture can be continuously implanted into the target mucosal tissue at other places. First, the suture is reassembled into the thread withdrawal groove 209 of the implantation needle 206. In the first step, the step of "implantation needle 206 puncturing the target mucosal tissue" described above is repeated, the first push-pull member 203 is pulled to drive the first body 201, and the implantation needle 206 is driven to pass through the clearance groove at the front of the second body 202, and then the second push-pull member 205 is pushed to drive the sliding member 212, so that the thread withdrawal portion 208 passes through the limiting protrusion 221 of the thread withdrawal groove 209 of the implantation needle 206 near the needle tip side of the implantation needle 206. After passing through, the hook portion 220 of the thread withdrawal portion 208 hooks the ring structure 104 at one end of the suture, and a part of the suture is pulled into the thread withdrawal groove 209. This realizes the reassembly of the suture thread to the implantation needle 206 in the human body. Further, the above-mentioned operation steps can be repeated to continuously implant suture threads into other target mucosal tissues.

[0142] After completing the implantation of one suture, the implantation device is taken out. The operation is the same as the operation steps of the first embodiment.

[0143] Suture implantation device embodiment 3:

[0144] The suture used in the implantation device in this embodiment is the suture embodiment 1, such as Fig.13 In this embodiment, some structures of the implant device are simplified, such as Figures 37 to 48 , and no sliding slot and sliding member 212 are provided. A receiving portion for the tip of the implanting needle 206 to abut is provided on the side of the retaining member 211 facing the implanting needle 206, and the receiving portion is provided as a second guide groove 227 along the length direction of the retaining member 211, so that the sliding member 212 can assist the implanting needle 206 in being retracted.

[0145] A limiting guide portion is provided on the other side of the stopper 211, through which the wire withdrawal portion 208 can pass. The limiting guide portion is formed as a guide channel 216 on the stopper 211 along the length direction of the stopper 211, which plays a limiting guiding role for the movement of the wire withdrawal portion 208, and can play the same limiting role as the sliding slot on the sliding member 212 in the first embodiment. The second push-pull member 205 is pushed by the control ring 226 of the handle 225, directly driving the wire withdrawal portion 208 to accurately pass through the wire withdrawal groove 209 of the implant needle 206. The rest of the basic structure is the same as that of the first embodiment.

[0146] The basic operation steps of the suture implantation device based on the above structural changes, such as "how to assemble the suture to the implantation needle 206", "send the implantation device into the human body", "open the implantation needle 206", "puncture and suture the mucosa with the implantation needle 206" and "release the suture from the implantation needle 206", are the same as those in Example 1. There are some differences in the operation steps of "removing the implantation device after completing the suture implantation": in this embodiment, the implantation device is not provided with a sliding member 212, so that there is no sliding member 212 in Example 1 to block the clearance groove behind the support tip 217 at the front end of the second body 202 and drive the implantation needle 206 to retract. In this embodiment, the energized guide wire 224 is a steel wire, the proximal end of which is connected to the handle 225, and the distal end is connected to the implantation needle 206. The steel wire is pulled by the handle 225, thereby driving the implantation needle 206 to retract and abut against the second guide groove 227 of the stopper 211 at the front of the second body 202. Furthermore, the first push-pull member 203 is continuously pulled to drive the first body 201 to approach the front of the second body 202 until the implantation needle 206 is completely retracted.

[0147] Suture implantation device embodiment 4:

[0148] The suture used in the implant device in this embodiment is the suture embodiment 2, such as Fig.32 .

[0149] In this embodiment, the structural changes of the implant device are the same as those in the third embodiment, such as Figures 49 to 51 , no sliding slot and sliding member 212 are provided at the front of the second body 202 .

[0150] The basic operation steps of implanting the device based on the above-mentioned structural changes, "how to assemble the suture to the implantation needle 206", "introducing the implantation device into the human body", "opening the implantation needle 206", "puncturing and suturing the mucosa with the implantation needle 206" and "releasing the suture from the implantation needle 206" are the same as those of Example 2, and the operation steps of "removing the implantation device after completing the suture implantation" are the same as those of Example 3.

[0151] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A suture implantation device, characterized in that: The invention comprises a first body (201) and a second body (202), wherein the first body (201) is rotatably mounted on the second body (202), the rotation axis of the first body (201) is perpendicular to the length direction of the second body (202), a first push-pull member (203) is arranged at the rear end of the first body (201), a sleeve portion (204) is arranged at the rear end of the second body (202), the first push-pull member (203) passes through the sleeve portion (204), and an implant member (203) is rotatably mounted at the front end of the first body (201). The implant needle (206) is provided with an implant avoidance groove (207) corresponding to the implant needle (206) at the front end of the second body (202), a wire withdrawal portion (208) is provided in the second body (202), the second body (202) is provided with a second push-pull member (205) for moving the wire withdrawal portion (208), the second push-pull member (205) passes through the sleeve portion (204), the implant needle (206) is provided with a wire withdrawal groove (209), and the wire withdrawal groove (209) is provided along the length direction of the implant needle (206); The thread withdrawal portion (208) can move relative to the implantation needle (206) within the entire thread withdrawal groove (209) to push the suture out of the thread withdrawal groove (209) and implant it into the target mucosal tissue; The rear portion of the second body (202) is a cylindrical structure, the side wall of the cylindrical structure has a rear slot (210) for the rear portion of the first body (201) to move in and out when rotating, and the front portion of the second body (202) has a stopper (211) arranged along the length direction of the second body (202); There are two stoppers (211), a gap is provided between the two stoppers (211), the gap is arranged along the length direction of the second body (202), and the stoppers (211) and the outer wall of the front portion of the second body (202) form a sliding slot; A sliding member (212) is provided in the second body (202), the wire withdrawal portion (208) and the second push-pull member (205) are provided on the sliding member (212), and the sliding member (212) can move along the sliding slot.

2. The suture implantation device according to claim 1, characterized in that: The side of the sliding member (212) facing the implantation needle (206) is provided with a receiving portion for the tip of the implantation needle (206) to abut against.

3. The suture implantation device according to claim 2, characterized in that: The storage portion is provided with a first guide groove (213) along the length direction of the sliding member (212), and a storage end wall (214) is provided at one end of the first guide groove (213) close to the front end of the sliding member (212).

4. The suture implantation device according to claim 1, characterized in that: The rear end of the sliding member (212) is provided with a third avoidance groove (215) corresponding to the rear part of the first body (201).

5. The suture implantation device according to claim 1, characterized in that: The front end of the second body (202) is provided with two supporting tips (217), and the implantation needle (206) passes through between the two supporting tips (217), and the direction of the supporting tips (217) is opposite to the direction in which the implantation needle (206) passes through the tissue.

6. The suture implantation device according to claim 1, characterized in that: An end of the wire withdrawal groove (209) close to the needle tip of the implant needle (206) is provided with an opening (219) extending from the side wall or the front end of the implant needle (206).

7. The suture implantation device according to claim 1, characterized in that: A hook portion (220) is provided at the top of the wire withdrawal portion (208), and the wire withdrawal portion (208) and the hook portion (220) are capable of passing through the wire withdrawal groove (209).

8. The suture implantation device according to claim 1, characterized in that: One of the side walls of the wire withdrawal groove (209) is provided with a limiting protrusion (221).

9. The suture implantation device according to claim 1, characterized in that: The rear end of the implant needle (206) is mounted on the front end of the first body (201) via a first rotating shaft.

10. The suture implantation device according to claim 9, characterized in that: The first rotating shaft sleeve is provided with an elastic member (222).

11. The suture implantation device according to claim 1, characterized in that: The implantation needle (206) is connected to a current-carrying guide wire (224); one end of the current-carrying guide wire (224) is connected to the implantation needle (206), and the other end is connected to a handle (225).

12. The suture implantation device according to any one of claims 1 to 11, characterized in that: The implantation needle (206) is a hollow tubular structure, and the inner cavity of the implantation needle (206) can accommodate a suture with a limiting portion.

13. A suture, suitable for use in the suture implantation device according to claim 12, characterized in that: The invention comprises a wire body (101), a front limiting portion (102), a rear limiting portion (103) and a fixed limiting portion (105); the front limiting portion (102) and the rear limiting portion (103) are movable along the wire body (101); a loop structure (104) for pulling is provided at one end of the wire body (101); and the fixed limiting portion (105) is located at the other end of the wire body (101).

14. A suture implantation device, characterized in that: The invention comprises a first body (201) and a second body (202), wherein the first body (201) is rotatably mounted on the second body (202), the rotation axis of the first body (201) is perpendicular to the length direction of the second body (202), a first push-pull member (203) is arranged at the rear end of the first body (201), a sleeve portion (204) is arranged at the rear end of the second body (202), the first push-pull member (203) passes through the sleeve portion (204), and an implant member (203) is rotatably mounted at the front end of the first body (201). The implant needle (206) is provided with an implant avoidance groove (207) corresponding to the implant needle (206) at the front end of the second body (202), a wire withdrawal portion (208) is provided in the second body (202), the second body (202) is provided with a second push-pull member (205) for moving the wire withdrawal portion (208), the second push-pull member (205) passes through the sleeve portion (204), the implant needle (206) is provided with a wire withdrawal groove (209), and the wire withdrawal groove (209) is provided along the length direction of the implant needle (206); The thread withdrawal portion (208) can move relative to the implantation needle (206) within the entire thread withdrawal groove (209) to push the suture out of the thread withdrawal groove (209) and implant it into the target mucosal tissue; The rear portion of the second body (202) is a cylindrical structure, the side wall of the cylindrical structure has a rear slot (210) for the rear portion of the first body (201) to move in and out when rotating, and the front portion of the second body (202) has a stopper (211) arranged along the length direction of the second body (202); The side of the stopper (211) facing the implant needle (206) is provided with a receiving portion for the tip of the implant needle (206) to abut against, and the side of the stopper (211) facing away from the implant needle (206) is provided with a limiting guide portion for the withdrawal portion (208) to pass through.

15. The suture implantation device according to claim 14, characterized in that: The receiving portion is provided with a second guide groove (227) along the length direction of the stopper (211).

16. The suture implantation device according to claim 14, characterized in that: The position-limiting guide portion is a guide channel (216) along the length direction of the stopper (211).

17. The suture implantation device according to claim 14, characterized in that: The front end of the second body (202) is provided with two supporting tips (217), and the implantation needle (206) passes through between the two supporting tips (217), and the direction of the supporting tips (217) is opposite to the direction in which the implantation needle (206) passes through the tissue.

18. The suture implantation device according to claim 14, characterized in that: An end of the wire withdrawal groove (209) close to the needle tip of the implant needle (206) is provided with an opening (219) extending from the side wall or the front end of the implant needle (206).

19. The suture implantation device according to claim 14, characterized in that: A hook portion (220) is provided at the top of the wire withdrawal portion (208), and the wire withdrawal portion (208) and the hook portion (220) are capable of passing through the wire withdrawal groove (209).

20. The suture implantation device according to claim 14, characterized in that: One of the side walls of the wire withdrawal groove (209) is provided with a limiting protrusion (221).

21. The suture implantation device according to claim 14, characterized in that: The rear end of the implant needle (206) is mounted on the front end of the first body (201) via a first rotating shaft.

22. The suture implantation device according to claim 21, characterized in that: The first rotating shaft sleeve is provided with an elastic member (222).

23. The suture implantation device according to claim 14, characterized in that: The implantation needle (206) is connected to a current-carrying guide wire (224); one end of the current-carrying guide wire (224) is connected to the implantation needle (206), and the other end is connected to a handle (225).

24. The suture implantation device according to any one of claims 14 to 23, characterized in that: The implantation needle (206) is a hollow tubular structure, and the inner cavity of the implantation needle (206) can accommodate a suture with a limiting portion.

25. A suture, suitable for use in the suture implantation device according to claim 24, characterized in that: The invention comprises a wire body (101), a front limiting portion (102), a rear limiting portion (103) and a fixed limiting portion (105); the front limiting portion (102) and the rear limiting portion (103) are movable along the wire body (101); a loop structure (104) for pulling is provided at one end of the wire body (101); and the fixed limiting portion (105) is located at the other end of the wire body (101).

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