Anchor and anchor device

Abstract

Provided are an anchor and an anchor device capable of smoothly embedding an anchor body of the anchor into a target tissue. 【Solution means】The anchor 10 includes a traction wire 100, an anchor body 200, and a drive tube. The traction wire is a flexible member. The anchor body is connected to the distal end of the traction wire. The drive tube is looped around at least a part of the traction wire. The anchor body is movable along the puncture needle 20 by the drive of the drive tube, and is configured to rotate at an angle with the traction wire after exiting from the distal end of the puncture needle and be fixed to the inner wall of the target tissue.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to an anchor and an anchor device.

Background Art

[0002] Endoscopic Ultrasonography (abbreviated as EUS) is a minimally invasive surgery for examining digestive tract diseases and lung diseases. Regarding the medical surgery of the digestive tract of patients, for example, in endoscopic ultrasound-guided gallbladder drainage surgery, a fixed stent is implanted between the gallbladder and the intestinal tract, and the fixed stent functions as a fistula to realize the communication between the gallbladder and the intestinal tract.

[0003] To quickly attach the fixed stent, usually, an anchor is implanted into the gallbladder via the intestinal tract under the guidance of an endoscope, and by pulling the traction line of the anchor outward, the gallbladder is moved by the anchor body of the anchor to be closely attached to the side wall of the intestinal tract. How to more smoothly implant the anchor body into the target tissue (for example, the gallbladder) is an urgent task.

Summary of the Invention

Problems to be Solved by the Invention

[0004] Embodiments of the present invention provide an anchor and an anchor device that can smoothly implant the anchor body of the anchor into a target tissue.

Means for Solving the Problems

[0005] In one aspect, embodiments of the present invention provide an anchor. The anchor includes a traction line, an anchor body, and a drive tube. The traction line is a flexible member. The anchor body is connected to the distal end of the traction line and can be pulled by the traction line. The drive tube is looped around at least a part of the traction line. The anchor body is movable along a puncture needle under the drive of the drive tube, and after exiting from the distal end of the puncture needle, it rotates to form an angle with the traction line and is configured to be fixed to the inner wall of the target tissue.

[0006] In one embodiment, the drive tube is looped around the traction wire, the anchor body is located on the distal end side of the drive tube, and when the anchor body is located within the puncture needle, the proximal end of the anchor body abuts against the distal end of the drive tube, whereby when the anchor body exits the puncture needle, the anchor body can rotate by the pushing of the drive tube and the pulling of the traction wire.

[0007] In one embodiment, the anchor further includes a distal end locking structure. The distal end locking structure is fixed to the proximal end of the puncture needle. A first accommodation channel is formed within the distal end locking structure. The first accommodation channel communicates with the needle channel of the puncture needle. A part of the drive tube and the anchor body are located within the first accommodation channel. The anchor body is configured to enter the needle channel of the puncture needle via the first accommodation channel by the driving of the drive tube. The distal end locking structure is configured to selectively cooperate with the drive tube to lock the drive tube and the anchor body within the first accommodation channel.

[0008] In one embodiment, the distal end locking structure includes a distal end connection member and a distal end locking member. The distal end connection member is fixed to the proximal end of the puncture needle. At least a part of the first accommodation channel for passing the drive tube and the anchor body is formed in the distal end connection member. The distal end locking member is provided on the distal end connection member and is configured to selectively cooperate with the drive tube to lock the drive tube and the anchor body to the distal end connection member or release them from the distal end connection member.

[0009] In one embodiment, the distal end locking member includes a distal end fixing portion and a distal end locking portion. A first accommodation channel is formed in the distal end fixing portion. The distal end fixing portion can be fixed to or released from the distal end connection member. The distal end locking portion is located within the distal end fixing portion. When the distal end fixing portion is fixed to the distal end connection member, the distal end locking portion cooperates with the distal end connection member to act on the drive tube, thereby locking the drive tube and the anchor body. When the distal end fixing portion is released from the distal end connection member, the distal end locking portion disengages from the distal end connection member to release the drive tube and the anchor body.

[0010] In one embodiment, the distal end locking portion is a distal end elastic member fitted within the distal end fixing portion. The distal end elastic member has elasticity at least along a first direction. The first direction intersects the extending direction of the drive tube. When the distal end fixing portion is fixed to the distal end connection member, the distal end elastic member is pressed by the distal end connection member and abuts against the drive tube along the first direction to lock the drive tube and the anchor body. When the distal end fixing portion is released from the distal end connection member, the distal end elastic member disengages from the distal end connection member and releases the drive tube and the anchor body during the process of repulsion.

[0011] In one embodiment, the distal end elastic member is a distal end elastic sleeve. A first through hole for passing the drive tube is formed in the distal end elastic sleeve. The distal end elastic sleeve is pressed by the distal end connection member, and the hole wall of the first through hole abuts against the drive tube to lock the drive tube and the anchor body. After disengaging from the distal end connection member, the hole wall of the first through hole rebounds to release the drive tube and the anchor body.

[0012] In one embodiment, the distal end fixing portion is a distal end locking nut, and the distal end locking nut is screwed to the distal end connection member.

[0013] In one embodiment, the anchor further includes a proximal end locking structure. The proximal end locking structure is installed at the proximal end of the drive tube and fixedly connected to the drive tube. A second accommodation channel is formed within the proximal end locking structure, and the traction line is inserted into the second accommodation channel. The proximal end locking structure is configured to selectively cooperate with the traction line to lock the traction line to the drive tube.

[0014] In one embodiment, the proximal end locking structure includes a proximal end connection member and a proximal end locking member. The proximal end connection member is fixed to the proximal end of the drive tube, and at least a part of the second accommodation channel for passing the traction line is formed in the proximal end connection member. The proximal end locking member is provided on the proximal end connection member and is configured to selectively cooperate with the traction line to lock the traction line to the proximal end connection member or release the traction line from the proximal end connection member.

[0015] In one embodiment, the proximal end locking member includes a proximal end fixing part and a proximal end locking part. The second accommodation channel is formed in the proximal end fixing part, and the proximal end fixing part can be fixed to or released from the proximal end connection member. The proximal end locking part is located within the proximal end fixing part. When the proximal end fixing part is fixed to the proximal end connection member, the proximal end locking part cooperates with the proximal end connection member to act on the traction line to lock the traction line. When the proximal end fixing part is released from the proximal end connection member, the proximal end locking part disengages from the proximal end connection member to release the traction line.

[0016] In one embodiment, the proximal end locking part is a proximal end elastic member fitted within the proximal end fixing part. The proximal end elastic member has elasticity at least along a first direction, and the first direction intersects the stretching direction of the traction line. When the proximal end fixing part is fixed to the proximal end connection member, the proximal end elastic member is pushed by the proximal end connection member to abut against the traction line along the first direction to lock the traction line. When the proximal end fixing part is released from the proximal end connection member, the proximal end elastic member disengages from the proximal end connection member and releases the traction line during the process of repulsion.

[0017] In one embodiment, the proximal elastic member is a proximal elastic sleeve, and a second through hole for passing a traction wire is formed in the proximal elastic sleeve. The proximal elastic sleeve is pressed by a proximal connecting member, and the hole wall of the second through hole presses against the traction wire to lock the drive tube. After separating from the proximal connecting member, the hole wall of the through hole rebounds to release the traction wire.

[0018] In one embodiment, the proximal fixing portion is a proximal lock nut, and the proximal lock nut is threadedly connected to the proximal connecting member.

[0019] In one embodiment, the anchor further includes a position limiting member. The position limiting member is selectively installed between the drive tube and the puncture needle. When the anchor body is located within the puncture needle and has a predetermined distance from the distal end of the puncture needle, the position limiting member cooperates with each of the drive tube and the puncture needle to limit the movement of the drive tube in the puncture needle. During the process of the anchor body moving from the first position to the distal end of the puncture needle, the position limiting member disengages from between the drive tube and the puncture needle. The first position is the position of the anchor body when it has a predetermined distance from the distal end of the puncture needle.

[0020] In one embodiment, the position limiting member is installed between the proximal lock structure and the distal lock structure of the anchor, selectively protrudes from the side wall of the drive tube, and at least when the anchor body is located within the puncture needle and has a predetermined distance from the distal end of the puncture needle, the position limiting member protrudes from the side wall of the drive tube. Thereby, the proximal end of the drive tube is stopped by the position limiting member on the side of the proximal end of the puncture needle. During the process of the anchor body moving from the first position to the distal end of the puncture needle, the position limiting member disengages from the side wall of the drive tube.

[0021] In one embodiment, the position limiting member is removably installed on the drive tube, and when the anchor body moves from the first position to the distal end of the puncture needle, the position limiting member is removed from the drive tube.

[0022] In one embodiment, the position limiting member is installed at the end of the proximal end locking structure of the anchor facing the distal end locking structure, the predetermined distance is 0, and the length of the position limiting member is equal to the maximum length that the anchor body extends from the distal end of the puncture needle.

[0023] In one embodiment, a position limiting groove and a side groove opening communicating with the position limiting groove are formed in the anchor body. Both the position limiting groove and the side groove opening extend in the longitudinal direction of the anchor body. One end of both the position limiting groove and the side groove opening penetrates through the proximal end of the anchor body. When the proximal end of the anchor body is located on the puncture needle, at least a part of the traction line is located in the position limiting groove. In the process of pulling and rotating the anchor body by the traction line, a part of the traction line detaches from the anchor body from the side groove opening.

[0024] In one embodiment, a relief opening is formed at the end of the position limiting groove located at the proximal end of the anchor body. One end of the relief opening extends to the side groove opening, and the other end of the relief opening extends to the side away from the axis of the position limiting groove and spaced from the side groove opening.

[0025] In one embodiment, a gap is provided between the other end of the relief opening and the groove bottom of the position limiting groove, and the groove bottom of the position limiting groove and the side groove opening are provided opposite to each other.

[0026] In one embodiment, when the proximal end of the anchor body is located on the puncture needle, the traction line extends along the axis of the position limiting groove, or when the proximal end of the anchor body is located on the puncture needle, the traction line is located between the axis of the position limiting groove and the side groove opening.

[0027] In one embodiment, a wire accommodating chamber is formed in the anchor body. The wire accommodating chamber and the groove chamber of the position limiting groove communicate with each other through a through hole. The distal end of the traction line is restricted in the wire accommodating chamber, and the traction line extends from the through hole into the position limiting groove.

[0028] In one embodiment, a first position limiting portion is formed at the distal end of the traction line, and the first position limiting portion is fitted in the wire accommodating chamber, whereby the distal end of the traction line is restricted in the wire accommodating chamber.

[0029] In one embodiment, a wire accommodation groove recessed inward is provided in the side wall of the anchor body, and the groove chamber of the wire accommodation groove is configured as a wire accommodation chamber.

[0030] In one embodiment, a mounting channel is formed in the anchor body. One end of the mounting channel communicates with a through hole, and the other end of the mounting channel penetrates through the distal end of the anchor body. An end cap is provided at the distal end of the anchor body, and the end cap is fitted into the mounting channel from the distal end of the anchor body. One end of the end cap is provided at a distance from the through hole, and a wire accommodation chamber is formed between one end of the end cap and the through hole.

[0031] In another aspect, an embodiment of the present invention further provides an anchor device. The anchor device includes a puncture needle and the above-mentioned anchor. The distal end of the puncture needle is configured to be inserted into the target tissue, and the anchor body of the anchor is configured to move along the puncture needle by driving of a drive tube and enter into the target tissue.

Effect of the Invention

[0032] The anchor and the anchor device according to the embodiments of the present invention use a traction wire as a flexible member and install the traction wire in the drive tube. In this way, when embedding the anchor body at one end of the traction wire, first embed the puncture needle into the target tissue, and then use the drive tube to drive the traction wire and the anchor body to move along the puncture needle into the target tissue. After the anchor body exits from the distal end of the puncture needle, the anchor body can rotate to form an angle with the traction wire. As a result, the anchor body is fixed to the inner wall of the target tissue, and by pulling the traction wire, the target tissue is moved by the anchor body and brought into close contact with other tissues. Due to the installation of the drive tube, the flexible traction wire and the anchor body can be smoothly embedded into the target tissue through the puncture needle.

Brief Description of the Drawings

[0033]

Figure 1

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Figure 2b

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Modes for Carrying Out the Invention

[0034] To help those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings used in the embodiments of the present invention. The described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without using inventive faculty also belong to the protection scope of the present invention.

[0035] To fully understand the present invention, many specific details have been described below. However, the present invention can be implemented in forms different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0036] In the description of the present invention, the directions or positional relationships expressed by terms such as "upper", "lower", "horizontal", "bottom", "inner", "outer", etc. are based on the drawings and are only for the purpose of simply and briefly explaining the present invention. It does not explicitly or implicitly imply that the said device or element must have a specific direction or be configured and operated in a specific direction. Therefore, it does not limit the present invention. In the present invention, unless otherwise specified, that the first feature is located "above" or "below" the second feature means that the first feature and the second feature may be in direct contact, or the first feature and the second feature may be in contact through another feature therebetween.

[0037] In the present invention, unless otherwise specified, terms such as "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a removable connection, or an integral connection. And it may be directly connected, indirectly connected through an intermediate, or the interiors of two elements may communicate or two elements may interact with each other. When described as a direct connection, there is no intermediate structure between the two connected entities, and they are integrally formed only by the connection structure. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

[0038] Terms such as "first" and "second" in this invention are for explanatory purposes only and do not indicate or imply relative importance or the number of technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the said features.

[0039] Endoscopic Ultrasonography (abbreviated as EUS) is a minimally invasive surgery for examining digestive tract diseases and lung diseases. In a medical operation related to a patient's digestive tract, in order to perform drainage, a fixed stent is implanted between two tissues, and the fixed stent functions as a fistula to realize the communication between the two tissues. For example, in an endoscopic ultrasonography-guided gallbladder drainage operation, a fixed stent is implanted between the gallbladder and the intestinal tract, and the fixed stent functions as a fistula to realize the communication between the gallbladder and the intestinal tract.

[0040] Since the gallbladder is in a free state, it is not easy to quickly attach the fixed stent between the gallbladder and the intestinal tract.

[0041] To ensure the quick attachment of the fixed stent, the embodiment of the present invention provides an endoscopic ultrasound anchor system comprising an endoscope and an anchor device. FIG. 1 is a schematic configuration diagram of a kind of anchor device according to an embodiment of the present invention. As shown in FIG. 1, the anchor device includes an anchor 10, and the anchor 10 includes a traction line 100 and an anchor body 200. The anchor body 200 is connected to the distal end of the traction line 100 (see 100b in FIG. 1).

[0042] When performing the surgery, first, under endoscopy, the anchor body 200 of the anchor 10 is implanted into the target tissue, for example, the gallbladder, via the first tissue, for example, the intestinal tract. For example, first, the sheath of the endoscope is introduced into the intestinal tract, and then the anchor 10 is introduced along the forceps channel of the sheath. When the anchor body 200 of the anchor 10 reaches the gallbladder via the intestinal tract, by pulling the traction line 100 outward, the anchor body 200 is stopped on the inner wall of the target tissue. By further pulling the traction line 100, the gallbladder is moved by the anchor body 200 and closely attached to the side wall of the intestinal tract, that is, the gallbladder is fixed by the anchor body and firmly fixed outside the intestinal tract. On the one hand, it contributes to quickly attaching the fixation stent between the intestinal tract and the gallbladder. On the other hand, the fixation stent is more stable between the intestinal tract and the gallbladder.

[0043] In some examples, to achieve the implantation of the anchor 10, the anchor 10 includes an outer tube and an inner tube. The inner tube is installed inside the outer tube. The traction line 100 of the anchor 10 is located in the inner tube. The anchor body 200 of the anchor 10 is located inside the outer tube. The proximal end of the anchor body 200 abuts against the distal end of the inner tube. When implanting the anchor body 200, the inner tube, the internal anchor body 200 and the traction line 100 are implanted into the intestinal tract along the sheath of the endoscope by the outer tube. With the outer tube kept stationary, by pushing the inner tube, the anchor body 200 on the distal end side of the inner tube is gradually pushed out of the outer tube, penetrating the side walls of the intestinal tract and the gallbladder to reach the inside of the gallbladder. By pulling the traction line 100, the anchor body 200 is stopped on the side wall of the gallbladder. By further pulling the traction line 100, the gallbladder is closely attached to the intestinal tract.

[0044] In the above example, the anchor body 200 can pull the gallbladder and can puncture tissue. In the process of the anchor body 200 puncturing tissue, since it is relatively difficult to visualize the anchor body 200 with an endoscope, the position of the anchor body 200 cannot be confirmed, and the embedding efficiency of the anchor body 200 is impaired. Also, the embedding distance of the anchor body 200 may be insufficient. For example, when the anchor body 200 is embedded up to the side wall of the gallbladder and is not completely inserted into the gallbladder, when the traction wire 100 is pulled, the anchor body 200 rotates and damages the gallbladder during the rotation process. Also, the anchor body 200 may be overly embedded and damage tissues such as the inner wall of the gallbladder.

[0045] Also, in the above example, the distal end of the traction wire 100 is fixed at an intermediate position of the anchor body 200, whereby it can be ensured that the anchor body 200 rotates better during the traction by the traction wire 100. To introduce the traction wire 100 from the intermediate position of the anchor body 200 into the inner tube, a notch is provided in the anchor body 200, and since the notch extends from the intermediate position to the proximal end of the anchor body 200, the traction wire 100 is introduced into the inner tube through the notch.

[0046] However, due to the above notch, the contact location between the inner tube and the proximal end of the anchor body 200 may deviate from the movement axis of the inner tube. For this reason, when the inner tube pushes the anchor body 200 to puncture tissue, the anchor body 200 is easily pushed to deviate from the movement axis of the inner tube. That is, in the process of the anchor body 200 being pushed by the inner tube, it is easy to form an angle with the inner tube, and the anchor body 200 cannot smoothly enter the inside of the gallbladder.

[0047] FIG. 2a is a schematic configuration diagram of another type of anchor device according to an embodiment of the present invention, and FIG. 2b is a partial enlarged view of portion A in FIG. 2a. As shown in FIGS. 1, 2a, and 2b, in some other examples, the anchor device further includes a puncture needle 20. When embedding the anchor 10, first, the puncture needle 20 is embedded under an endoscope through the intestinal tract and the gallbladder in sequence. When the distal end of the puncture needle 20, that is, the needle tip reaches a predetermined position in the gallbladder, the anchor 10 is moved along the needle channel of the puncture needle 20 until the anchor body 200 of the anchor 10 exits from the distal end of the puncture needle 20, thereby realizing embedding the anchor body 200 into the gallbladder.

[0048] To facilitate the embedding of the anchor 10, in some examples, the traction wire 100 is made of a rigid material and has a repulsive force with the anchor body 200, that is, the anchor body 200 has a force that repels to the anchor fixing (fixing by the anchor) position. Here, the anchor fixing position is the position when the anchor body 200 and the traction wire 100 form a predetermined angle. In the embedding process, the anchor body 200 is pushed by the rigid traction wire 100 and moves along the needle channel of the puncture needle 20. After the anchor body 200 exits from the needle tip of the puncture needle 20, the anchor body 200 forms a predetermined angle with the traction wire 100 under the action of the repulsive force. At this time, if the traction wire 100 is pulled, the gallbladder can be moved by the anchor body 200 and closely attached to the intestinal tract.

[0049] However, in the above example, in the process of the anchor 10 moving along the puncture needle 20, the anchor body 200 is parallel to the traction wire 100 or has a storage angle less than the predetermined angle with the traction wire 100 under the restriction of the puncture needle 20. Since the anchor body 200 has a repulsive force trying to return to the anchor fixing position, the acting force between the anchor body 200 and the inner wall of the needle channel of the puncture needle 20 is relatively large, and the resistance between the anchor body 200 and the inner wall of the needle channel of the puncture needle 20 is relatively large during the movement of the anchor body 200, which affects the smooth embedding of the anchor 10.

[0050] In addition, since the traction wire 100 is a rigid material, it is necessary to push the anchor body 200 and move it along the puncture needle 20. Therefore, the diameter of the traction wire 100 is relatively large. For example, in this example, the diameter of the rigid traction wire 100 is 0.63 mm. In order to suppress the space occupied by the endoscope forceps channel, in an actual operation, after embedding the anchor body 200 into the target tissue, before embedding the fixation stent, first remove the endoscope, and then insert it to the side of the traction wire so that the traction wire is located outside the endoscope forceps channel. Further, embed the fixation stent via the endoscope forceps channel. The whole process of the operation is complicated.

[0051] In addition, in order to eliminate the need to insert the endoscope again, it is necessary to reduce the size of the fixation stent, which will affect the attachment of the fixation stent and the actual drainage effect in this case.

[0052] According to the anchor device and the anchor of the embodiment of the present invention, the traction wire is made of a flexible member, and the traction wire is installed in the drive tube. In this way, when embedding the anchor body at one end of the traction wire, first embed the puncture needle into the target tissue, and then use the drive tube to move and drive the traction wire and the anchor body along the puncture needle into the target tissue. After the anchor body exits from the distal end of the puncture needle, the anchor body can rotate so as to form an angle with the traction wire under the traction of the traction wire. Thereby, the anchor body is stopped on the inner wall of the target tissue, and by further pulling the traction wire, the target tissue is moved by the anchor body and brought into close contact with other tissues. According to the installation of the drive tube, the flexible traction wire and the anchor body can be smoothly embedded into the target tissue through the puncture needle.

[0053] In addition, by using the traction line as a flexible member, the repulsive force between the flexible member and the anchor body is prevented. As a result, when the anchor body moves inside the puncture needle, it does not excessively contact the side wall of the puncture needle, the frictional force between the anchor body and the puncture needle is reduced, and it is ensured that the anchor body moves stably along the puncture needle by the driving of the drive tube, thereby improving the stability and efficiency of the embedding of the anchor body. Further, since the puncture needle is embedded in advance, the anchor body according to the embodiment of the present invention does not need to puncture the tissue, and it only needs to move inside the gallbladder along the puncture needle. As a result, it is possible to prevent the anchor body from being inclined and embedded in the target tissue, and further improve the efficiency and success rate of the embedding of the anchor body.

[0054] Hereinafter, with reference to the drawings, the structure of the anchor device and the anchor according to the embodiment of the present invention will be described in detail.

[0055] FIG. 3 is a schematic overall configuration diagram of an anchor according to an embodiment of the present invention. FIG. 4 is a cross-sectional view of the distal end lock structure in FIG. 3. FIG. 5 is a schematic partial view of portion B in FIG. 4. FIG. 6 is a schematic configuration diagram when the anchor according to an embodiment of the present invention is in the first state. FIG. 7 is a schematic configuration diagram when the anchor according to an embodiment of the present invention is in the second state. As shown in FIGS. 1 to 7, an anchor device including an anchor 10 and a puncture needle 20 according to an embodiment of the present invention is configured such that the distal end of the puncture needle 20 (see 20b in FIG. 1) is inserted into the target tissue. For example, when embedding the anchor 10, first, the puncture needle 20 is embedded into the first tissue, for example, the intestinal tract, along the sheath of the endoscope, and then the puncture needle 20 is further embedded so that the distal end of the puncture needle 20 penetrates the tissue wall of the first tissue and the tissue wall of the target tissue and reaches a predetermined position, for example, inside the gallbladder. The predetermined position is a position where the distal end of the puncture needle 20 can be relatively well visualized.

[0056] Exemplarily, the puncture needle 20 includes, but is not limited to, a 19G ultrasonic puncture needle.

[0057] In an embodiment of the present invention, the anchor 10 includes a traction line 100, and the traction line 100 is a flexible member, for example, a flexible wire made of a fiber material or other flexible materials. In the embodiment of the present invention, the material of the traction line 100 is not limited, as long as it can be ensured that the traction line 100 is a flexible member.

[0058] The anchor 10 includes an anchor body 200, and the anchor body 200 is connected to the distal end of the traction line 100 and can be pulled by the traction line 100.

[0059] In some examples, the anchor body 200 can form an anchor fixing angle with the traction line 100 by rotating under the traction of the traction line 100.

[0060] In other examples, the anchor body 200 may rotate in other ways. For example, the anchor body 200 may be rotationally driven by a puncture needle 20 or a driving member installed at the distal end of the traction line 100. In the embodiment of the present invention, the rotation method of the anchor body 200 is not limited.

[0061] The anchor fixing angle is the angle formed between the anchor body 200 and the traction line 100 when the anchor body 200 pulls the target tissue (such as the gallbladder) to be in close contact with the intestinal tract. Exemplarily, the anchor fixing angle is 90° or 90° ± 10°, and specifically, it can be adjusted according to the angle of the side wall of the gallbladder, and the anchor body 200 and the side wall of the gallbladder may be in close contact. In the embodiment of the present invention, the anchor fixing angle is not limited.

[0062] As shown in FIGS. 3 and 4, the anchor 10 according to the embodiment of the present invention includes a drive tube 300, and the drive tube 300 is looped around at least a part of the traction line 100. The anchor body 200 is movable along the puncture needle 20 by the drive of the drive tube 300. For example, the anchor body 200 can enter the needle channel of the puncture needle 20 from the proximal end of the puncture needle 20 (see 20a in FIG. 1) and move along the needle channel of the puncture needle 20 by the drive of the drive tube 300. Then, after the anchor body 200 exits from the distal end of the puncture needle 20, it rotates by the traction of the traction line 100 to form an angle (for example, an anchor fixing angle) with the traction line 100. Thereby, the anchor body 200 is stopped on the inner wall of the target tissue. By further pulling the traction line 100, the target tissue is moved by the anchor body 200 and closely contacts the outer wall of the first tissue, realizing the anchor fixation of the target tissue.

[0063] For the sake of convenience of explanation, the extending direction of the needle channel of the puncture needle 20 is defined as the x direction, and the radial direction of the needle channel of the puncture needle 20 is defined as the y direction. The radial dimension of the drive tube 300 is less than or equal to the radial dimension of the puncture needle 20 along the y direction, whereby the drive tube 300 can move smoothly along the needle channel of the puncture needle 20.

[0064] In some examples, the drive tube 300 is looped around the first portion of the traction line 100. When the anchor body 200 is located outside the drive tube 300, the first portion is the portion between the distal end 100b and the proximal end 100a of the traction line 100. Thereby, a part of the traction line 100 close to the proximal end is exposed from the proximal end side of the drive tube 300, and the operator pulls the traction line 100 from the proximal end of the traction line 100 to drive and rotate the anchor body 200 by the traction line 100. And the portion of the traction line 100 close to the distal end is located outside the drive tube 300 and connected to the anchor body 200, realizing the rotation of the anchor body 200.

[0065] When the anchor body 200 is located inside the drive tube 300, the first portion is the portion between the distal end of the traction wire 100 and a position spaced from the distal end by a first length. Exemplarily, the first length is an appropriate length such as 2 / 3 or 3 / 4 of the total length of the traction wire 100. That is, the proximal end of the traction wire 100 (see 100a in FIG. 1) and a position spaced from the proximal end by a second length may be exposed from the proximal end side of the drive tube 300. By the operator pulling the traction wire 100 from the proximal end of the traction wire 100, the anchor body 200 can be driven and rotated by the traction wire 100.

[0066] The second length is the difference between the total length of the traction wire 100 and the first length, and is an appropriate length such as 1 / 3 or 1 / 4 of the total length of the traction wire 100. In the embodiments of the present invention, the first length and the second length are not limited. As long as the drive tube 300 drives the traction wire 100 and the anchor body 200 to be smoothly embedded into the target tissue along the puncture needle 20, and by the operator pulling the proximal end of the traction wire 100 to rotate the anchor body 200, it can be ensured that the target tissue can be anchor-fixed to the outer wall of the first tissue.

[0067] Hereinafter, with reference to FIGS. 1 to 7, in an example where the first tissue is the intestinal tract and the target tissue is the gallbladder, the process of embedding the anchor 10 will be exemplarily described.

[0068] After the puncture needle 20 is embedded at a predetermined position, the drive tube 300 pushes the traction wire 100 and the anchor body 200 at the distal end of the traction wire 100 into the needle channel of the puncture needle 20 from the proximal end of the puncture needle 20.

[0069] By further pushing the drive tube 300, the anchor body 200 is advanced toward the distal end of the puncture needle 20 until the anchor body 200 exits from the distal end of the puncture needle 20. The anchor body 200 extends on the distal end side of the drive tube 300. By further pulling the traction wire 100, the anchor body 200 can be rotated to form an anchor fixing angle.

[0070] In this step, the anchor body 200 exits from the distal end of the puncture needle 20 in either a manner that the entire anchor body 200 exits from the distal end of the puncture needle 20, or a portion of the anchor body 200 exits from the distal end of the puncture needle 20, as long as the anchor body 200 can move to the outside of the distal end of the puncture needle 20 in the process of rotating the proximal end of the anchor body 200 by pulling the traction wire 100.

[0071] The puncture needle 20 is pulled back so as to return the puncture needle 20 to the forceps channel of the endoscope, the drive tube 300 is pulled back into the puncture needle 20, and then the puncture needle 20 is withdrawn together with the drive tube 300, and the traction wire 100 is left in the forceps channel.

[0072] The traction wire 100 is pulled, for example from a proximal end of the traction wire 100, to attach the anchor body 200 to the inner wall of the gallbladder and further pull the gallbladder to the outer wall of the intestine, thereby achieving anchoring of the gallbladder.

[0073] As shown in Figures 6 and 7, in some examples, the drive tube 300 is attached around the traction line 100 and the anchor body 200 is located on the distal end side of the drive tube 300, i.e., the drive tube 300 is attached only around the traction line 100 and the anchor body 200 is exposed to the outside of the drive tube 300 and is located on the distal end side of the drive tube 300.

[0074] When the anchor body 200 is positioned within the puncture needle 20, the proximal end of the anchor body 200 (see 200a in Figures 5 and 6) and the distal end of the drive tube 300 abut, thereby allowing the anchor body 200 to rotate with the push of the drive tube 300 and the pull of the pull line 100 as the anchor body 200 exits the puncture needle 20, e.g., when the proximal end of the anchor body 200 is aligned with the distal end of the puncture needle 10.

[0075] As shown in FIGS. 6 and 7, for example, in the process of embedding the anchor 10, the drive tube 300 first pushes the distal end of the anchor body 200 (see 200b in FIGS. 5-7) and gradually enters the needle channel of the puncture needle 20 from the proximal end of the puncture needle 20. Further, by abutting against the proximal end of the anchor body 200 with the distal end of the drive tube 300 and pushing it, the anchor body 200 is advanced toward the distal end of the puncture needle 20. When the anchor body 200 exits from the distal end of the puncture needle 20, for example, when the proximal end of the anchor body 200 just reaches the distal end of the puncture needle 20, the drive tube 300 remains in contact with and pushing the anchor body 200. By pulling the traction line 100, the anchor body 200 can rotate stably under the push of the drive tube 300 and the pull of the traction line 100.

[0076] Of course, in some examples, when the anchor body 200 exits from the distal end of the puncture needle 20, the pushing force of the drive tube 300 on the anchor body 200 is not required, and the anchor body 200 can rotate by the pull of the traction line 100.

[0077] When the anchor body 200 is located within the puncture needle 20, the longitudinal direction of the anchor body 200 and the extending direction of the puncture needle 20 may be parallel or may form an angle. Since the traction line 100 is a flexible member, there is no repulsive force between the traction line 100 and the anchor body 200. When the anchor body 200 moves within the puncture needle 20, it only moves along the side wall of the puncture needle 20 without excessive contact with the side wall of the puncture needle 20. The frictional force between the anchor body 200 and the puncture needle 20 is reduced, ensuring that the anchor body 200 moves stably along the puncture needle 20 under the drive of the drive tube 300, and the stability and efficiency of the embedding of the anchor body 200 can be improved.

[0078] In some other examples, the drive tube 300 is looped around the outer periphery of the traction line 100 and the anchor body 200, that is, both the anchor body 200 and the traction line 100 are located within the drive tube 300. During the process of embedding the anchor 10, the distal end of the drive tube 300 gradually enters the needle channel of the puncture needle 20 from the proximal end of the puncture needle 20, allowing the anchor body 200 and a part of the traction line 100 to enter the needle channel of the puncture needle 20. By pushing the drive tube 300, the drive tube 300 is advanced towards the distal end of the puncture needle 20. When the anchor body 200 reaches the distal end of the puncture needle 20 under the drive of the drive tube 300, for example, when the distal ends of the drive tube 300 and the anchor body 200 are aligned, or when the distal end of the drive tube 300 just reaches the distal end of the puncture needle 20, the distal end of the anchor body 200 reaches the distal end of the puncture needle 20. At this time, by pulling back the drive tube 300, the anchor body 200 is exposed from the drive tube 300, and the proximal end of the anchor body 200 abuts against the distal end of the drive tube 300. Then, continuously push the drive tube 300 towards the distal end of the puncture needle 20, so that the proximal end of the anchor body 200 is exposed from the puncture needle 20 under the pushing of the drive tube 300. When the proximal end of the anchor body 200 just reaches the distal end of the puncture needle 20, the drive tube 300 remains in contact with and pushing the anchor body 200. By pulling the traction line 100, the anchor body 200 can rotate stably under the pushing of the drive tube 300 and the pulling of the traction line 100.

[0079] However, in some examples, a part of the anchor body 200 may be installed inside the drive tube 300, and the other part of the anchor body 200 may be exposed outside the drive tube 300. When the distal end of the anchor body 200 reaches the distal end of the puncture needle 20, by pulling back the drive tube 300, the proximal end of the anchor body 200 is abutted against the distal end of the drive tube 300, and by further pushing the drive tube 300 toward the distal end of the puncture needle 20, the anchor body 200 is pushed by the drive tube 300 and exposed from the puncture needle 20. When the proximal end of the anchor body 200 just reaches the distal end of the puncture needle 20, the drive tube 300 remains in contact with and pushing the anchor body 200, and the anchor body 200 can rotate stably under the pushing of the drive tube 300 and the pulling of the traction wire 100.

[0080] In the above example, since the traction wire 100 is a flexible member and there is no repulsive force between the traction wire 100 and the anchor body 200, the anchor body 200 and the inner wall of the drive tube 300 contact each other to allow relative movement between the anchor body 200 and the drive tube 300 when pulling back the drive tube 300, without the anchor body 200 strongly contacting the side wall of the drive tube 300. It is only necessary to ensure that the anchor body 200 and the traction wire 100 are both pushed to the distal end of the puncture needle 20 during the advancing process of the drive tube 300.

[0081] Also, since the puncture needle 20 is embedded in advance, the anchor body 200 according to the embodiment of the present invention does not need to puncture the tissue, and only needs to move along the puncture needle 20 into the gallbladder. Thereby, it is possible to prevent the anchor body 200 from tilting and being embedded in the target tissue, and further improve the embedding efficiency and success rate of the anchor body 200.

[0082] Compared with the above example of the rigid traction wire 100, the installation of the flexible traction wire 100 and the drive tube 300 can reduce the diameter of the traction wire 100, and since the space occupied by the traction wire 100 in the endoscope forceps channel is suppressed, it is not necessary to first remove the endoscope before embedding the fixed stent and then insert it laterally to the traction wire 100. This can simplify the surgical process and improve surgical efficiency. Also, it is not necessary to reduce the size of the fixed stent, thereby ensuring the attachment efficiency and stability of the fixed stent and the drainage effect of the fixed stent.

[0083] Exemplarily, the diameter of the flexible traction wire 100 is a value smaller than the diameter of the rigid traction wire 100, such as 0.15 mm, 0.1 mm or 0.2 mm. In the embodiments of the present invention, the diameter dimension of the traction wire 100 is not limited, as long as it can ensure that the anchor body 200 is pulled and rotated by the traction wire 100.

[0084] As shown in FIGS. 2b and 4, in some examples, the anchor 10 includes a distal end locking structure 400. The distal end locking structure 400 is configured to be fixed to the proximal end of the puncture needle 20. For example, as shown in FIG. 2b, the proximal end of the puncture needle 20 has a fixing portion 21, and the distal end locking structure 400 is fixed to the fixing portion 21 by a method such as screw engagement of a female screw and a male screw, engagement connection, or connection by a flange, to realize the fixation between the anchor 10 and the proximal end of the puncture needle 20.

[0085] Exemplarily, an inclined guide surface is formed at the end of the distal end locking structure 400 that is fixed to the fixing portion 21, and a guide portion 411 having a tapered structure is formed at the end of the distal end locking structure 400. When assembling, by inserting the guide portion 411 into the fixing portion 21, the preliminary positioning of the assembly of the distal end locking structure 400 and the fixing portion 21 is realized, and then the distal end locking structure 400 is fixed to the fixing portion 21 by a method such as screw connection.

[0086] Since the length of the anchor 10 is relatively long, by providing the guide portion 411, the distal end locking structure 400 can be temporarily fixed to the fixing portion 21 of the puncture needle 20, which can contribute to the rapid assembly and fixation of the distal end locking structure 400 and the fixing portion 21, and prevent the anchor 10 from shaking randomly and being unable to be quickly assembled with the fixing portion 21.

[0087] Exemplarily, a first accommodating channel 430 is formed in the distal end locking structure 400, the first accommodating channel 430 communicates with the needle channel of the puncture needle 20, and a part of the drive tube 300 and the anchor body 200 are located in the first accommodating channel 430. For example, the drive tube 300 and the anchor body 200 located on the distal end side of the drive tube 300 are located in the first accommodating channel 430.

[0088] In the process of embedding the anchor 10, first, the distal end locking structure 400 is fixed to the fixing portion 21 at the proximal end of the puncture needle 20 to realize the fixation of the anchor 10, and then by pushing the drive tube 300, the drive tube 300 and the anchor body 200 are advanced along the first accommodating channel 430 to the puncture needle 20. By providing the distal end locking structure 400, it can contribute to aligning the drive tube 300 and the anchor body 200 with respect to the distal end of the puncture needle 20, and quickly push the anchor body 200 into the needle channel of the puncture needle 20, thereby improving the insertion efficiency of the anchor 10 into the puncture needle 20.

[0089] In some examples, the distal end locking structure 400 selectively cooperates with the drive tube 300 to lock the drive tube 300 and the anchor body 200 within the first receiving channel 430, such that when the anchor 10 contacts the proximal end of the puncture needle 20, the drive tube 300 drives the anchor body 200 to quickly enter into the needle channel of the puncture needle 20. For example, before inserting the anchor body 200 into the puncture needle 20, the distal end locking structure 400 and the drive tube 300 cooperate to lock the drive tube 300 and the anchor body 200 within the first receiving channel 430, thereby preventing the anchor body 200 from accidentally entering the first receiving channel 430 due to the drive of the drive tube 300 before the anchor 10 is fixed to the puncture needle 20, and preventing the anchor body 200 from being unable to quickly contact the proximal end of the puncture needle 20 due to the anchor body 200 being in a free state.

[0090] Also, when the anchor body 200 rotates until it reaches the anchor fixing angle and the puncture needle 20 and the drive tube 300 are pulled back, the distal end locking structure 400 and the drive tube 300 cooperate to lock the drive tube 300 to the puncture needle 20, such that during the process of pulling back the puncture needle 20, the drive tube 300 is also synchronously pulled back outside the body, and the traction wire 100 is left within the forceps channel of the endoscope.

[0091] When moving the drive tube 300 relative to the puncture needle 20, the distal end locking structure 400 releases the drive tube 300 to enable the drive tube 300 to move along the puncture needle 20. For example, when the distal end of the puncture needle 20 reaches a predetermined position, the distal end locking structure 400 releases the drive tube 300, and in this way, by advancing the drive tube 300 towards the puncture needle 20, the traction wire 100 and the anchor body 200 can be advanced along the puncture needle 20 towards the target tissue.

[0092] In some examples, the distal end locking structure 400 is a cylindrical structure, and inside the cylindrical structure, a first receiving channel 430 for passing the drive tube 300 and the anchor body 200 is formed along the length direction of the cylindrical structure.

[0093] Exemplarily, an elastic protrusion is formed on the inner wall of the distal end locking structure 400, and the elastic protrusion extends into the first accommodation channel 430. By the elastic protrusion abutting against the outer wall of the drive tube 300, the drive tube 300 and the anchor body 200 are locked to the distal end locking structure 400. When the distal end locking structure 400 is fixed to the fixing portion 21 and the anchor body 200 is embedded, the elastic protrusion is disengaged from the outer wall of the drive tube 300, and the drive tube 300 and the anchor body 200 are released from the distal end locking structure 400, whereby the drive tube 300 is movable along the puncture needle 20. By forming an elastic protrusion for locking the drive tube 300 on the inner wall of the distal end locking structure 400, the structure and the assembly process of the distal end locking structure 400 can be simplified.

[0094] Continuing to refer to FIG. 4, in some other examples, the distal end locking structure 400 includes a distal end connection member 410 and a distal end locking member 420. The distal end connection member 410 is configured to be fixed to the proximal end of the puncture needle 20, and at least a part of the first accommodation channel 430 for passing the drive tube 300 and the anchor body 200 is formed in the distal end connection member 410. For example, the distal end connection member 410 and the fixing portion 21 at the proximal end of the puncture needle 20 are fixedly connected.

[0095] The distal end locking member 420 is provided on the distal end connection member 410 and is configured to selectively cooperate with the drive tube 300 to lock the drive tube 300 and the anchor body 200 to the distal end connection member 410 or release them from the distal end connection member 410.

[0096] Exemplarily, by the cooperation of the distal end locking member 420 and the drive tube 300, the drive tube 300 can be locked to the distal end connecting member 410. By releasing the cooperation between the distal end locking member 420 and the drive tube 300, the drive tube 300 can be released from the distal end connecting member 410, and the drive tube 300 becomes movable relative to the distal end connecting member 410. The drive tube 300 can then push the anchor body 200 into the needle channel of the puncture needle 20 along the first receiving channel 430.

[0097] In some examples, the distal end locking member 420 is a position limiting pin inserted into the distal end connecting member 410. For example, the distal end connecting member 410 has a pin hole, and the position limiting pin is inserted into the pin hole. After the distal end connecting member 410 and the fixing portion 21 of the puncture needle 20 are fixedly connected, if the position limiting pin is further pushed into the pin hole until one end of the position limiting pin abuts against the outer wall of the drive tube 300, the locking between the drive tube 300 and the anchor body 200 is realized. By pulling the position limiting pin outwards to separate one end of the position limiting pin from the drive tube 300, the release between the drive tube 300 and the anchor body 200 is realized.

[0098] In some other examples, the distal end locking member 420 includes a distal end fixing portion 421 and a distal end locking portion 422. A first receiving channel 430 is formed in the distal end fixing portion 421, and the distal end fixing portion 421 can be fixed to or released from the distal end connecting member 410. That is, the distal end fixing portion 421 can be fixed to the distal end connecting member 410 or can be detached from the distal end connecting member 410.

[0099] The distal end locking portion 422 is located within the distal end fixing portion 421. When the distal end fixing portion 421 is fixed to the distal end connecting member 410, the distal end locking portion 422 acts on the drive tube 300 in cooperation with the distal end connecting member 410 to lock the drive tube 300 and the anchor body 200.

[0100] For example, the distal end fixing portion 421 has a cylindrical structure, and when the cylindrical structure is fixed to the distal end connecting member 410, it is annularly mounted on a part of the structure of the distal end connecting member 410. The distal end locking portion 422 is located on the inner wall of the distal end fixing portion 421, that is, on the inner wall of the first accommodating channel 430.

[0101] Exemplarily, the distal end fixing portion 421 has a hollow structure, and at the end of the distal end fixing portion 421 spaced from the distal end connecting member 410, it has a through hole (for example, the first through hole 423) for passing the drive tube 300. The end of the distal end fixing portion 421 facing the distal end connecting member 410 has an open structure. Through the open structure, the distal end connecting member 410 can enter the distal end fixing portion 421 and connect with the distal end fixing portion 421. The hollow chamber of the distal end fixing portion 421 can function as a part of the first accommodating channel 430. When the distal end fixing portion 421 is detached from the distal end connecting member 410, the hollow chamber passes through the drive tube 300. The first through hole 423 at the end of the distal end fixing portion 421 functions as another part of the first accommodating channel 430, and the proximal end of the drive tube 300 can exit from the distal end locking structure 400 through the first through hole 423 at the end of the distal end fixing portion 421.

[0102] Exemplarily, the distal end fixing portion 421 is a distal end locking nut, and the distal end locking nut and the distal end connecting member 410 are screwed together, thereby simplifying the connection structure between the distal end fixing portion 421 and the distal end connecting member 410, contributing to fixing the distal end locking portion 422 within the distal end fixing portion 421, and also contributing to the cooperation between the distal end locking portion 422 and the distal end connecting member 410.

[0103] When the distal end fixing portion 421 is fixed to the distal end connecting member 410, one end of the distal end connecting member 410 is inserted into the distal end fixing portion 421 and abuts against the distal end locking portion 422. Due to the abutment with the distal end connecting member 410, one end of the distal end locking portion 422 acts on the drive tube 300. For example, by abutting one end against the drive tube 300, the drive tube 300 and the anchor body 200 are locked.

[0104] When the distal end fixing portion 421 is released from the distal end connecting member 410, the distal end locking portion 422 is configured to disengage from the distal end connecting member 410 and release the drive tube 300 and the anchor body 200. For example, after the distal end fixing portion 421 is released from the distal end connecting member 410, one end of the distal end connecting member 410 disengages from the inside of the distal end fixing portion 421 and disengages from the distal end locking portion 422. After the distal end locking portion 422 is released from contacting the distal end connecting member 410, it can return to its initial position. As a result, one end of the distal end locking portion 422 disengages from the drive tube 300, releasing the drive tube 300 and the anchor body 200.

[0105] Exemplarily, the distal end locking portion 422 is a lever (e.g., a first lever) installed on the inner wall of the distal end fixing portion 421. The first lever has an initial angle (the angle formed initially) with the inner wall of the distal end fixing portion 421 that is less than 90°, and is inclined toward the distal end connecting member 410.

[0106] When the distal end fixing portion 421 is fixed to the distal end connecting member 410, one end of the distal end connecting member 410 is inserted into the distal end fixing portion 421 and contacts the first lever. The first lever rotates by the contact and pushing of the distal end connecting member 410, causing the first lever to rotate in a direction perpendicular to the inner wall of the distal end fixing portion 421 until the free end of the first lever contacts the drive tube 300, thereby achieving locking of the drive tube 300.

[0107] After the distal end fixing portion 421 is released from the distal end connecting member 410, one end of the distal end connecting member 410 disengages from the inside of the distal end fixing portion 421 and disengages from the first lever. The first lever can rotate back to its initial position after being released from contacting the distal end connecting member 410, that is, the angle formed with the inner wall of the distal end fixing portion 421 becomes the initial angle. At this time, the free end of the first lever disengages from the drive tube 300, achieving release of the drive tube 300.

[0108] In an embodiment of the present invention, through the locking and unlocking process of the drive tube 300 by the distal end locking portion 422 and the interlocking with the fixing and unlocking of the distal end connecting member 410 by the distal end fixing portion 421, for example, when the distal end fixing portion 421 and the distal end connecting member 410 are fixed, the distal end locking portion 422 cooperates with the distal end connecting member 410 to lock the drive tube 300. When the fixing of the distal end fixing portion 421 and the distal end connecting member 410 is released, the distal end locking portion 422 releases the drive tube 300 and the anchor body 200. In this way, by the operator operating the distal end fixing portion 421, the locking and unlocking of the drive tube 300 by the distal end locking portion 422 can be realized, other locking operations are not required, and the locking and unlocking process of the drive tube 300 can be simplified.

[0109] In some examples, the distal end locking portion 422 is a distal end elastic member fitted in the distal end fixing portion 421. The distal end elastic member has elasticity at least in a first direction, and the first direction intersects the extending direction of the drive tube 300. When the distal end fixing portion 421 is fixed to the distal end connecting member 410, the distal end elastic member is pushed by the distal end connecting member 410 and abuts against the drive tube 300 along the first direction to lock the drive tube 300 and the anchor body 200. When the distal end fixing portion 421 is released from the distal end connecting member 410, the distal end elastic member detaches from the distal end connecting member 410 and releases the drive tube 300 and the anchor body 200 during the repulsion process.

[0110] Exemplarily, the distal end elastic member is installed between the inner wall of the distal end fixing portion 421 and the drive tube 300. The distal end elastic member has a first end and a second end separated in the first direction. The first end abuts against the inner wall of the distal end fixing portion 421, and the second end contacts the outer wall of the drive tube 300. The first direction may be perpendicular to the extending direction of the drive tube 300, or may form an obtuse or acute angle with the extending direction of the drive tube 300. The first direction can refer to the a direction shown in FIG. 4. The a direction may be the y direction, or may be a direction forming an angle with the y direction.

[0111] The angle formed by the first direction and the extending direction of the drive tube 300 means the angle facing the direction of the distal end connecting member 410 formed by the first end of the distal end elastic member and the drive tube 300.

[0112] Illustrated by the first direction being perpendicular to the extending direction of the drive tube 300, that is, the first direction being the y direction, there is a certain gap between the portion of the first end of the distal end elastic member close to the distal end connecting member 410 and the inner wall of the distal end fixing portion 421. In the initial state, when the second end of the distal end elastic member contacts the drive tube 300, the drive tube 300 can move relative to the distal end fixing portion 421. That is, in the initial state, the second end of the distal end elastic member only lightly contacts the drive tube 300, and the acting force between them is relatively small.

[0113] When the distal end fixing portion 421 is fixed to the distal end connecting member 410, the distal end connecting member 410 is inserted into the gap between the first end of the distal end elastic member and the distal end fixing portion 421. The distal end elastic member is pushed by the distal end connecting member 410 and abuts against the drive tube 300 along the first direction. For example, by the distal end connecting member 410 pushing the distal end elastic member along the first direction, the second end of the distal end elastic member and the drive tube 300 are brought into close contact. That is, the acting force between the second end of the distal end elastic member and the drive tube 300 becomes large, locking the drive tube 300 and the anchor body 200. When the distal end fixing portion 421 is released from the distal end connecting member 410, the distal end elastic member disengages from the distal end connecting member 410 and returns to the initial state. As a result, the acting force between the second end of the distal end elastic member and the drive tube 300 becomes small, and the distal end elastic member releases the drive tube 300 and the anchor body 200 during the repulsion process.

[0114] However, in some examples, when the angle formed between the first direction and the extending direction of the drive tube 300 is an acute angle, when the distal end fixing portion 421 is fixed to the distal end connecting member 410, the distal end connecting member 410 inclines along the first direction and presses the distal end elastic member, and the distal end elastic member is pressed by the distal end connecting member 410 and the second end abuts against the drive tube 300, locking the drive tube 300 and the anchor body 200. When the distal end fixing portion 421 is released from the distal end connecting member 410, the distal end elastic member disengages from the distal end connecting member 410, and the distal end elastic member returns to its initial state along the first direction. As a result, the acting force between the second end of the distal end elastic member and the drive tube 300 becomes smaller, and the distal end elastic member releases the drive tube 300 and the anchor body 200 during the repulsion process.

[0115] In some examples, the distal end elastic member is a spring, an elastic pad, or the like. When the distal end elastic member has a structure such as a spring or an elastic pad, there is one or more distal end elastic members. When there is one distal end elastic member, the distal end elastic member can be installed at any position in the circumferential direction of the distal end fixing portion 421. When there are a plurality of distal end elastic members, the plurality of distal end elastic members are installed at intervals along the circumferential direction of the inner wall of the distal end fixing portion 421, that is, the plurality of distal end elastic members are installed at intervals around the circumferential direction of the drive tube 300. As a result, when the second ends of the plurality of distal end elastic members are pressed by the distal end connecting member 410, they can abut against a plurality of positions in the circumferential direction of the drive tube 300, and stable locking of the drive tube 300 can be realized.

[0116] Since the distal end locking member 420 is a distal end elastic member, on the one hand, the distal end locking member 420 can be easily assembled between the distal end fixing portion 421 and the drive tube 300, and on the other hand, the distal end locking member 420 can be in reliable contact with the distal end connecting member 410 and is deformable, thereby improving the certainty of locking the drive tube 300. Also, since the distal end locking member 420 is a distal end elastic member, the distal end locking member 420 can smoothly repel to its initial position after disengaging from the distal end connecting member 410, improving the certainty of releasing the drive tube 300.

[0117] In some examples, the distal end elastic member is a distal end elastic sleeve. A first through hole is formed in the distal end elastic sleeve for passing the drive tube 300. For example, the distal end elastic sleeve is annularly mounted on a part of the outer wall of the drive tube 300, and the distal end elastic sleeve is received in the inner chamber at the end of the distal end fixing portion 421.

[0118] When the distal end elastic sleeve is in its initial state, that is, when it does not cooperate with the distal end connecting member 410, the hole wall of the first through hole only lightly contacts the drive tube 300, and the drive tube 300 is movable relative to the first through hole within the first through hole.

[0119] When the distal end connecting member 410 enters the distal end fixing portion 421 and presses the distal end elastic sleeve, the distal end elastic sleeve is pressed by the distal end connecting member 410, and the hole wall of the first through hole presses (presses and stops) the drive tube 300, locking the drive tube 300 and the anchor body 200. And after separating from the distal end connecting member 410, the hole wall of the first through hole rebounds to release the drive tube 300 and the anchor body 200.

[0120] For example, when the distal end fixing portion 421 is fixed to the distal end connecting member 410, the distal end connecting member 410 presses the distal end elastic sleeve along the first direction, and the distal end elastic sleeve is pushed by the distal end connecting member 410 and deformed (i.e., compressed) at least along the first direction. The hole wall of the first through hole presses the drive tube 300, increasing the acting force between the hole wall of the first through hole and the drive tube 300 to lock the drive tube 300 and the anchor body 200. When the distal end fixing portion 421 is released from the distal end connecting member 410, the distal end elastic sleeve disengages from the distal end connecting member 410 and returns to its initial state. As a result, the acting force between the hole wall of the first through hole and the drive tube 300 decreases, and the distal end elastic sleeve releases the drive tube 300 and the anchor body 200 during the rebounding process.

[0121] Since the distal elastic member is a distal elastic sleeve, the distal elastic sleeve is pressed by the distal connection member 410 to contact the entire circumferential surface of the drive tube 300, thereby realizing a stable lock with respect to the drive tube 300.

[0122] Exemplarily, the distal elastic sleeve includes an elastically deformable sleeve structure such as a silicone sleeve. In the embodiments of the present invention, the material of the distal elastic sleeve is not limited.

[0123] As shown in FIG. 4, for example, the distal elastic sleeve is an elastic ball, and the outer surface of the elastic ball is uniformly pressed by the end walls of the entire circumference of the distal connection member 410 and is deformable. Thereby, the acting force between the inner wall of the first through hole and each position in the circumferential direction of the drive tube 300 is the same, and it can be ensured that the force received by the drive tube 300 is uniform and does not tilt.

[0124] Of course, in some examples, the distal elastic sleeve may be a square or irregular sleeve structure. In the embodiments of the present invention, the shape of the distal elastic sleeve is not limited.

[0125] FIG. 8 is a cross-sectional view of the proximal lock structure in FIG. 3. As shown in FIGS. 3 and 8, in some examples, the anchor 10 further includes a proximal lock structure 500.

[0126] The proximal lock structure 500 is installed at the proximal end of the drive tube 300 and is fixedly connected to the drive tube 300. For example, the proximal lock structure 500 is fixedly connected to the drive tube 300 by means such as welding, adhesion, engagement, etc. In the embodiments of the present invention, the connection method between the proximal lock structure 500 and the drive tube 300 is not limited.

[0127] In some examples, a second receiving channel 530 is formed within the proximal end locking structure 500, and the traction line 100 is inserted into the second receiving channel 530. Exemplarily, the traction line 100 exposed on the side of the proximal end of the drive tube 300 is inserted into a part of the second receiving channel 530, and another part of the second receiving channel 530 accommodates a part of the proximal end of the drive tube 300 and is fixedly connected to the drive tube 300.

[0128] Since the traction line 100 according to the embodiment of the present invention is a flexible member, in the process of driving the flexible member and the anchor body 200 by the drive tube 300 to advance to the distal end of the puncture needle 20, the proximal end locking structure 500 is configured to selectively cooperate with the traction line 100 to lock the traction line 100 to the drive tube 300.

[0129] Since the proximal end of the drive tube 300 is fixed to the proximal end locking structure 500 and the traction line 100 is locked within the proximal end locking structure 500, the traction line 100 is locked to the drive tube 300.

[0130] For example, when the distal end of the traction line 100 is fixed to the anchor body 200, the anchor body 200 is installed on the side of the distal end of the drive tube 300, the proximal end of the anchor body 200 abuts against the distal end of the drive tube 300, and the traction line 100 is not moved relative to the drive tube 300, the traction line 100 is stretched within the drive tube 300, and through the cooperation between the proximal end locking structure 500 and the traction line 100, the traction line 100 is stretched and locked to the drive tube 300. In this way, the movement of the traction line 100 relative to the drive tube 300 can be prevented.

[0131] Exemplarily, before the drive tube 300 drives the traction line 100 and the anchor body 200 to move into the puncture needle 20, the traction line 100 is stretched and locked to the drive tube 300 by the proximal end locking structure 500, and then the drive tube 300 can drive the traction line 100 and the anchor body 200 to synchronously move along the puncture needle 20 into the target tissue. In this way, it can be prevented that the traction line 100 is deposited within the puncture needle 20 during the process of the drive tube 300 sending the anchor body 200.

[0132] For example, in the process of sending the anchor body 200, if it accidentally retreats and then moves forward again, compared with the traction line 100 without tension, the traction line 100 tightened by the proximal end locking structure 500 can relieve or prevent deposition between the distal end of the drive tube 300 and the anchor body 200. Thereby, it is possible to prevent the deposited and entangled traction line 100 from affecting the smooth pushing of the anchor body 200 by the drive tube 300, and it is also possible to prevent the normal rotation of the anchor body 200 from being affected during the process of retracting the traction line 100.

[0133] When the anchor body 200 moves to a predetermined position and rotates, for example, when the proximal end of the anchor body 200 moves to the distal end of the puncture needle 20, the proximal end locking structure 500 releases the traction line 100 to make the traction line 100 movable relative to the drive tube 300. At this time, by pulling the traction line 100, the anchor body 200 can be rotated.

[0134] In some examples, the proximal end locking structure 500 is a cylindrical structure, and a second accommodation channel 530 for passing the traction line 100 along the length direction of the cylindrical structure is formed inside the cylindrical structure. Exemplarily, elastic protrusions are formed on the inner wall of the proximal end locking structure 500, and the elastic protrusions extend into the second accommodation channel 530.

[0135] When the proximal end locking structure 500 is fixed to the proximal end of the drive tube 300, the elastic protrusion abuts against the outer wall of the traction wire 100, and the traction wire 100 is locked to the proximal end locking structure 500. Since the proximal end locking structure 500 is fixed to the drive tube 300, the traction wire 100 is locked to the drive tube 300 and cannot move relative to the drive tube 300. When the proximal end locking structure 500 is released from the drive tube 300, that is, after being released from the drive tube 300, the elastic protrusion disengages from the outer wall of the traction wire 100, and the traction wire 100 is released from the proximal end locking structure 500. As a result, the traction wire 100 is released from the drive tube 300 and can move relative to the drive tube 300. By forming an elastic protrusion for locking the traction wire 100 on the inner wall of the proximal end locking structure 500, the structure and assembly process of the proximal end locking structure 500 can be simplified.

[0136] Continuing to refer to FIG. 8, in some other examples, the proximal end locking structure 500 includes a proximal end connection member 510 and a proximal end locking member 520. The proximal end connection member 510 is fixed to the proximal end of the drive tube 300, and at least a part of a second accommodation channel 530 for passing the traction wire 100 is formed in the proximal end connection member 510. Exemplarily, the proximal end portion of the drive tube 300 is fixed within the second accommodation channel 530, and the portion of the traction wire 100 extending from the proximal end of the drive tube 300 is inserted into another part of the second accommodation channel 530.

[0137] The proximal end locking member 520 is provided on the proximal end connection member 510 and is configured to selectively cooperate with the traction wire 100 to lock the traction wire 100 to the proximal end connection member 510 or release it from the proximal end connection member 510.

[0138] Exemplarily, when the proximal end locking member 520 and the traction wire 100 cooperate, the traction wire 100 is locked to the proximal end connecting member 510, and the proximal end connecting member 510 is fixed to the proximal end of the drive tube 300. Therefore, the traction wire 100 is locked to the drive tube 300 and stretched within the drive tube 300, and cannot move relative to the drive tube 300. When the cooperation between the proximal end locking member 520 and the proximal end connecting member 510 is released, the traction wire 100 is released from the proximal end connecting member 510, that is, released from the drive tube 300. As a result, the traction wire 100 can move relative to the drive tube 300.

[0139] In some examples, the proximal end locking member 520 is a position limiting pin inserted into the proximal end connecting member 510. For example, the proximal end connecting member 510 has a pin hole, and the position limiting pin is inserted into the pin hole. After the proximal end connecting member 510 and the proximal end of the drive tube 300 are fixedly connected, if the position limiting pin is further pressed into the pin hole until one end of the position limiting pin abuts against the outer wall of the traction wire 100, the locking of the traction wire 100 is realized. By pulling the position limiting pin outwards, the release of the traction wire 100 is realized by separating one end of the position limiting pin from the traction wire 100.

[0140] In some other examples, the proximal end locking member 520 includes a proximal end fixing portion 521 and a proximal end locking portion 522. A second receiving channel 530 is formed in the proximal end fixing portion 521, and the proximal end fixing portion 521 can be fixed to the proximal end connecting member 510 or released from the proximal end connecting member 510. That is, the proximal end fixing portion 521 can be fixed to the proximal end connecting member 510 or detached from the proximal end connecting member 510.

[0141] The proximal locking portion 522 is located within the proximal fixing portion 521. When the proximal fixing portion 521 is fixed to the proximal connecting member 510, the proximal locking portion 522 cooperates with the proximal connecting member 510 to act on the traction wire 100, thereby locking the traction wire 100. For example, the proximal fixing portion 521 has a cylindrical structure, and when the cylindrical structure is fixed to the proximal connecting member 510, it is annularly mounted on a part of the structure of the proximal connecting member 510. The proximal locking portion 522 is located on the inner wall of the proximal fixing portion 521, that is, on the inner wall of the second accommodating channel 530.

[0142] Exemplarily, the proximal fixing portion 521 has a hollow structure, and at the end of the proximal fixing portion 521 spaced apart from the proximal connecting member 510, it has a through hole (for example, the second through hole 523) for passing the traction wire 100. The end of the proximal fixing portion 521 facing the proximal connecting member 510 has an open structure. Through the open structure, the proximal connecting member 510 can enter the proximal fixing portion 521 and connect to the proximal fixing portion 521. The hollow chamber of the proximal fixing portion 521 can function as a part of the second accommodating channel 530. When the proximal fixing portion 521 is detached from the proximal connecting member 510, the hollow chamber allows the traction wire 100 to pass through. The second through hole 523 at the end of the proximal fixing portion 521 functions as another part of the second accommodating channel 530, and the proximal end of the traction wire 100 can exit the proximal locking structure 500 through the second through hole 523 at the end of the proximal fixing portion 521.

[0143] Exemplarily, the proximal fixing portion 521 is a proximal locking nut, and the proximal locking nut and the proximal connecting member 510 are screwed together. Thereby, the connection structure between the proximal fixing portion 521 and the proximal connecting member 510 can be simplified, which contributes to fixing the proximal locking portion 522 within the proximal fixing portion 521 and also contributes to the cooperation between the proximal locking portion 522 and the proximal connecting member 510.

[0144] When the proximal end fixing portion 521 is fixed to the proximal end connecting member 510, one end of the proximal end connecting member 510 is inserted into the proximal end fixing portion 521 and abuts against the proximal end locking portion 522. The proximal end locking portion 522, by abutting against the proximal end connecting member 510, has one end acting on the traction wire 100. For example, by abutting one end against the traction wire 100, the traction wire 100 is locked.

[0145] When the proximal end fixing portion 521 is released from the proximal end connecting member 510, the proximal end locking portion 522 is configured to disengage from the proximal end connecting member 510 and release the traction wire 100.

[0146] For example, after the proximal end fixing portion 521 is released from the proximal end connecting member 510, one end of the proximal end connecting member 510 disengages from the inside of the proximal end fixing portion 521 and disengages from the proximal end locking portion 522. After the proximal end locking portion 522 is released from abutting against the proximal end connecting member 510, it can return to its initial position. As a result, one end of the proximal end locking portion 522 disengages from the traction wire 100 and releases the traction wire 100.

[0147] Exemplarily, the proximal end locking portion 522 is a lever (for example, the second lever) installed on the inner wall of the proximal end fixing portion 521. The initial angle of the second lever with respect to the inner wall of the proximal end fixing portion 521 is less than 90°, and it inclines towards the proximal end connecting member 510.

[0148] When the proximal end fixing portion 521 is fixed to the proximal end connecting member 510, one end of the proximal end connecting member 510 is inserted into the proximal end fixing portion 521 and abuts against the second lever. The second lever rotates by the abutment and pushing of the proximal end connecting member 510. As a result, the second lever rotates in a direction perpendicular to the inner wall of the proximal end fixing portion 521 until the free end of the second lever contacts the traction wire 100, and locking of the traction wire 100 is achieved.

[0149] After the proximal end fixing portion 521 is released from the proximal end connecting member 510, one end of the proximal end connecting member 510 disengages from the inside of the proximal end fixing portion 521 and disengages from the second lever. The second lever can rotate to its initial position after being disengaged from contact with the proximal end connecting member 510. That is, the angle formed with the inner wall of the proximal end fixing portion 521 becomes the initial angle. At this time, the free end of the second lever disengages from the traction wire 100, realizing the release of the traction wire 100.

[0150] In an embodiment of the present invention, through the interlocking of the locking and releasing process of the traction wire 100 by the proximal end locking portion 522 and the fixing and releasing of the proximal end connecting member 510 by the proximal end fixing portion 521, for example, when the proximal end fixing portion 521 and the proximal end connecting member 510 are fixed, the proximal end locking portion 522 cooperates with the proximal end connecting member 510 to lock the traction wire 100. When the fixing of the proximal end fixing portion 521 and the proximal end connecting member 510 is released, the proximal end locking portion 522 releases the traction wire 100. In this way, by the operator operating the proximal end fixing portion 521, the locking and releasing of the traction wire 100 by the proximal end locking portion 522 can be realized, eliminating the need for other locking operations and simplifying the process of locking and releasing the traction wire 100.

[0151] In some examples, the proximal end locking portion 522 is a proximal end elastic member fitted inside the proximal end fixing portion 521. The proximal end elastic member has elasticity at least in a first direction, and the first direction intersects the extending direction of the traction wire 100.

[0152] When the proximal end fixing portion 521 is fixed to the proximal end connecting member 510, the proximal end elastic member is pushed by the proximal end connecting member 510 and abuts against the traction wire 100 along the first direction to lock the traction wire 100. When the proximal end fixing portion 521 is released from the proximal end connecting member 510, the proximal end elastic member disengages from the proximal end connecting member 510 and releases the traction wire 100 during the repulsion process.

[0153] Exemplarily, the proximal elastic member is installed between the inner wall of the proximal fixing portion 521 and the traction line 100. The proximal elastic member has a first end and a second end separated in a first direction. The first end abuts against the inner wall of the proximal fixing portion 521, and the second end contacts the outer wall of the traction line 100. The first direction may be perpendicular to the extending direction of the traction line 100, or may form an obtuse or acute angle with the extending direction of the traction line 100. The angle formed by the first direction and the extending direction of the traction line 100 means the angle towards the direction of the proximal connecting member 510 formed by the first end of the proximal elastic member and the traction line 100.

[0154] Illustrated by the first direction being perpendicular to the extending direction of the traction line 100, there is a certain gap between the portion of the first end of the proximal elastic member close to the proximal connecting member 510 and the inner wall of the proximal fixing portion 521. In the initial state, when the second end of the proximal elastic member contacts the traction line 100, the traction line 100 can move relative to the proximal fixing portion 521. That is, in the initial state, the second end of the proximal elastic member only lightly contacts the traction line 100, and the acting force between them is relatively small.

[0155] When the proximal fixing portion 521 is fixed to the proximal connecting member 510, the proximal connecting member 510 is inserted into the gap between the first end of the proximal elastic member and the proximal fixing portion 521. The proximal elastic member is pushed by the proximal connecting member 510 and abuts against the traction line 100 along the first direction. For example, by the proximal connecting member 510 pushing the proximal elastic member along the first direction, the second end of the proximal elastic member is brought into close contact with the traction line 100. That is, the acting force between the second end of the proximal elastic member and the traction line 100 becomes large, locking the traction line 100. When the proximal fixing portion 521 is released from the proximal connecting member 510, the proximal elastic member disengages from the proximal connecting member 510 and returns to the initial state. As a result, the acting force between the second end of the proximal elastic member and the traction line 100 becomes small, and the proximal elastic member releases the traction line 100 during the repulsion process.

[0156] In some examples, when the angle formed between the first direction and the extending direction of the traction wire 100 is an acute angle, when the proximal end fixing portion 521 is fixed to the proximal end connecting member 510, the proximal end connecting member 510 inclines along the first direction and presses the proximal end elastic member. The proximal end elastic member is pressed by the proximal end connecting member 510 and the second end abuts against the traction wire 100, locking the traction wire 100. When the proximal end fixing portion 521 is released from the proximal end connecting member 510, the proximal end elastic member disengages from the proximal end connecting member 510, and the proximal end elastic member returns to its initial state along the first direction. As a result, the acting force between the second end of the proximal end elastic member and the traction wire 100 becomes smaller, and the proximal end elastic member releases the traction wire 100 during the repulsion process.

[0157] In some examples, the proximal end elastic member is a spring, an elastic pad, etc. When the proximal end elastic member has a structure such as a spring or an elastic pad, there is one or more proximal end elastic members. When there is one proximal end elastic member, the proximal end elastic member can be installed at any position in the circumferential direction of the proximal end fixing portion 521. When there are a plurality of proximal end elastic members, the plurality of proximal end elastic members are installed at intervals along the circumferential direction of the inner wall of the proximal end fixing portion 521, that is, the plurality of proximal end elastic members are installed at intervals around the circumferential direction of the traction wire 100. As a result, when the second ends of the plurality of proximal end elastic members are pressed by the proximal end connecting member 510, they can abut against a plurality of positions in the circumferential direction of the traction wire 100, and stable locking of the traction wire 100 can be realized.

[0158] Since the proximal end locking member 520 is a proximal end elastic member, on the one hand, the proximal end locking member 520 can be easily assembled between the proximal end fixing portion 521 and the traction wire 100. On the other hand, the proximal end locking member 520 can be in reliable contact with the proximal end connecting member 510 and is deformable, thereby improving the reliability of locking the traction wire 100. Also, since the proximal end locking member 520 is a proximal end elastic member, the proximal end locking member 520 can smoothly repel to its initial position after disengaging from the proximal end connecting member 510, improving the reliability of releasing the traction wire 100.

[0159] In some examples, the proximal elastic member is a proximal elastic sleeve.

[0160] A second through-hole is formed for passing the traction wire 100 through the proximal elastic sleeve.

[0161] For example, the proximal elastic sleeve is looped around a part of the outer wall of the traction wire 100, and the proximal elastic sleeve is received in the inner chamber of the end of the proximal fixing portion 521 with respect to the opening structure.

[0162] When the proximal elastic sleeve is in the initial state, that is, when it does not cooperate with the proximal connection member 510, the hole wall of the second through-hole only lightly contacts the traction wire 100, and the traction wire 100 is movable relative to the inside of the second through-hole within the second through-hole.

[0163] When the proximal connection member 510 enters the proximal fixing portion 521 and presses the proximal elastic sleeve, the proximal elastic sleeve is pressed by the proximal connection member 510, the hole wall of the second through-hole presses against the traction wire 100 to lock the traction wire 100, and after separating from the proximal connection member 510, the hole wall of the through-hole rebounds to release the traction wire 100.

[0164] For example, when the proximal fixing portion 521 is fixed to the proximal connection member 510, the proximal connection member 510 presses the proximal elastic sleeve along the first direction, and the proximal elastic sleeve is pushed by the proximal connection member 510 and deformed (i.e., compressed) at least along the first direction, the hole wall of the second through-hole presses against the traction wire 100, and the acting force between the hole wall of the second through-hole and the traction wire 100 becomes large to lock the traction wire 100. When the proximal fixing portion 521 is released from the proximal connection member 510, the proximal elastic sleeve disengages from the proximal connection member 510 and the proximal elastic sleeve returns to its initial state, whereby the acting force between the hole wall of the second through-hole and the traction wire 100 becomes small, and the proximal elastic sleeve releases the traction wire 100 during the rebounding process.

[0165] Since the proximal elastic member is the proximal elastic sleeve, the proximal elastic sleeve is pressed by the proximal connection member 510 to contact the entire surface in the circumferential direction of the traction wire 100, and a stable lock for the traction wire 100 can be realized.

[0166] Exemplarily, the proximal elastic sleeve includes an elastically deformable sleeve structure such as a silicone sleeve. In the embodiments of the present invention, the material of the proximal elastic sleeve is not limited.

[0167] For example, the proximal elastic sleeve is an elastic ball, and the outer surface of the elastic ball is uniformly pressed by the end walls of the entire circumference of the proximal connection member 510 and is deformable. Thereby, the acting force between the inner wall of the second through hole and each position in the circumferential direction of the traction wire 100 is the same, and it can be ensured that the traction wire 100 receives a uniform force and does not tilt.

[0168] Of course, in some examples, the proximal elastic sleeve may be a square or irregular sleeve structure. In the embodiments of the present invention, the shape of the proximal elastic sleeve is not limited.

[0169] Hereinafter, continuing to take the intestinal tract as the first tissue and the gallbladder as the target tissue, the process of implanting the anchor device will be exemplarily described.

[0170] The distal connection member 410 of the distal lock structure 400 is fixed to the fixed portion 21 at the proximal end of the puncture needle 20. The distal fixed portion 421 and the distal connection member 410 are fixed. The drive tube 300 is locked in the distal connection member 410. The puncture needle 20 having the anchor 10 at the proximal end moves to the target tissue. After the puncture needle 20 is implanted at a predetermined position, the distal fixed portion 421 is released from the distal connection member 410, and the drive tube 300 is released from the distal connection member 410.

[0171] The proximal end fixing portion 521 is fixed to the proximal end connecting member 510 to tension the traction line 100, and the drive tube 300 is pushed and moved into the needle channel of the puncture needle 20 to push the traction line 100 and the anchor body 200 at the distal end of the traction line 100 into the needle channel of the puncture needle 20 from the proximal end of the puncture needle 20.

[0172] By further pushing the drive tube 300, the anchor body 200 is advanced toward the distal end of the puncture needle 20 until the anchor body 200 exits the distal end of the puncture needle 20. For example, the proximal end of the anchor body 200 is aligned with the distal end of the puncture needle 20, the proximal end of the anchor body 200 abuts the distal end of the drive tube 300, the proximal end fixing portion 521 is released from the proximal end connecting member 510 to release the traction line 100, and the traction line 100 is further pulled, whereby the anchor body 200 can be rotated to form the anchor fixing angle.

[0173] By pulling back the puncture needle 20, the puncture needle 20 is pulled back into the forceps channel of the endoscope, the drive tube 300 is pulled back into the puncture needle 20, and the distal end fixing portion 421 is fixed to the distal end connecting member 410 to lock the drive tube 300 to the proximal end of the puncture needle 20, the puncture needle 20 is retrieved together with the drive tube 300, and the traction line 100 is left in the forceps channel.

[0174] The traction wire 100 is pulled, for example from a proximal end of the traction wire 100, to attach the anchor body 200 to the inner wall of the gallbladder and further pull the gallbladder to the outer wall of the intestine, thereby achieving anchoring of the gallbladder.

[0175] Fig. 9 is a schematic diagram showing a cooperative relationship between the proximal end locking structure and the position limiting member in Fig. 3. As shown in Figs. 3 and 9, in some examples, the anchor 10 further includes a position limiting member 600.

[0176] The position limiting member 600 is selectively installed between the drive tube 300 and the puncture needle 20, that is, it may be located between the drive tube 300 and the puncture needle 20, or may be detached from between the drive tube 300 and the puncture needle 20. For example, the position limiting member 600 is installed between the drive tube 300 and the puncture needle 20 in one state and is detached from between the drive tube 300 and the puncture needle 20 in another state.

[0177] When the anchor body 200 is located within the puncture needle 20 and has a predetermined distance from the distal end of the puncture needle 20, the position limiting member 600 cooperates with the drive tube 300 and the puncture needle 20 respectively to limit the movement of the drive tube 300 in the puncture needle 20.

[0178] During the process of the anchor body 200 moving from the first position to the distal end of the puncture needle 20, the position limiting member 600 detaches from between the drive tube 300 and the puncture needle 20. The first position is the position of the anchor body 200 when it has a predetermined distance from the distal end of the puncture needle 20.

[0179] For example, the position limiting member 600 includes an elastic engaging member and an engaging groove. The elastic engaging member is provided on one of the drive tube 300 and the puncture needle 20, and the engaging groove is provided on the other of the drive tube 300 and the puncture needle 20.

[0180] When the anchor body 200 is located within the puncture needle 20 and has a predetermined distance from the distal end of the puncture needle 20, the elastic engaging member engages in the engaging groove to limit the movement of the drive tube 300 in the puncture needle 20.

[0181] During the process of the anchor body 200 moving from the first position to the distal end of the puncture needle 20, the elastic engaging member disengages from the engaging groove, and the drive tube 300 becomes movable along the puncture needle 20.

[0182] Exemplarily, the predetermined distance may be 0, that is, the distal end of the anchor body 200 is aligned with the distal end of the puncture needle 20. The predetermined distance may be any value of 10 mm or less, for example, appropriate values such as 2 mm, 4 mm, 7 mm, or 10 mm. Of course, the predetermined distance only serves to represent a distance relatively close to the distal end of the puncture needle 20, and in the embodiments of the present invention, the predetermined distance is not limited.

[0183] By installing the position limiting member 600 between the drive tube 300 and the puncture needle 20, when the anchor body 200 moves along the needle channel of the puncture needle 20 to a position having a predetermined distance from the distal end of the puncture needle 20, the movement of the drive tube 300 can be stopped, whereby the operator can be informed that the anchor body 200 has reached or is about to reach the distal end of the puncture needle 20. Therefore, by controlling the advancing speed of the drive tube 300, the anchor body 200 can be slowly approached to the distal end of the puncture needle 20 or slowly withdrawn from the distal end of the puncture needle 20. Thereby, when the proximal end of the anchor body 200 is close to or reaches the distal end of the puncture needle 20, the traction line 100 can be pulled back in a timely manner to rotate the anchor body 200, preventing the anchor body 200 from protruding excessively from the distal end of the puncture needle 20 and affecting the rotation of the anchor body 200 or damaging the target tissue.

[0184] Also, when the position limiting member 600 does not lock the drive tube 300 to the puncture needle 20, that is, before the anchor body 200 reaches the first position, the embedding efficiency of the anchor 10 can be improved by accelerating the advancing speed of the drive tube 300.

[0185] Specifically, when installed, the position limiting member 600 can be installed at any position in the longitudinal direction of the drive tube 300. For example, the position limiting member 600 is installed between the proximal end of the drive tube 300 and the proximal end of the puncture needle 20 and selectively protrudes from the side wall of the drive tube 300.

[0186] When at least the anchor body 200 is located within the puncture needle 20 and has a predetermined distance from the distal end of the puncture needle 20, the position limiting member 600 protrudes from the side wall of the drive tube 300, whereby the proximal end of the drive tube 300 is stopped by the position limiting member 600 on the side of the proximal end of the puncture needle 20. For example, when the anchor body 200 is located within the puncture needle 20 and has a predetermined distance from the distal end of the puncture needle 20, the position limiting member 600 protrudes from the side wall of the drive tube 300, or when the distance between the anchor body 200 and the distal end of the puncture needle 20 is greater than the predetermined distance, the position limiting member 600 protrudes from the side wall of the drive tube 300, that is, before the anchor body 200 moves from the proximal end of the puncture needle 20 to the first position, the position limiting member 600 can always protrude from the side wall of the drive tube 300.

[0187] Exemplarily, the position limiting member 600 is installed between the proximal end locking structure 500 and the distal end locking structure 400. When the position limiting member 600 protrudes from the side wall of the drive tube 300 and when the position limiting member 600 moves with the drive tube 300 to one end of the distal end locking structure 400, the position limiting member 600 is stopped on one side of the distal end locking structure 400 (i.e., the side facing the proximal end locking structure 500).

[0188] When installing, the outer diameter of the drive tube 300 is set to fit the first through hole 423 of the distal end locking structure 400. When the position limiting member 600 protrudes from the side wall of the drive tube 300, the radial distance between the outer end of the position limiting member 600 and the drive tube 300 is greater than the radius of the first through hole 423, whereby the position limiting member 600 can be stopped on one side of the distal end locking structure 400, that is, the proximal end of the drive tube 300 can be stopped on the side of the proximal end of the puncture needle 20 to prevent further advancement of the drive tube 300 along the puncture needle 20.

[0189] In addition, in the process of the anchor body 200 moving from the first position to the distal end of the puncture needle 20, when the position limiting member 600 disengages from the side wall of the drive tube 300, that is, when the position limiting member 600 reaches one side of the distal end locking structure 400, there is a predetermined distance between the distal end of the anchor body 200 and the distal end of the puncture needle 20. Thereafter, when the position limiting member 600 disengages from the side wall of the drive tube 300, the drive tube 300 is slowly further advanced into the puncture needle 20, and the anchor body 200 exits from the distal end of the puncture needle 20 and rotates.

[0190] In some examples, the position limiting member 600 is an elastic protrusion, and the elastic protrusion can protrude from the side wall of the drive tube 300 and can also return into the drive tube 300. For example, a receiving groove is formed in the drive tube 300, and the distal end of the elastic protrusion is received in the receiving groove. In the natural state, the elastic protrusion protrudes from the receiving groove, and when the elastic protrusion is pressed from the side or the vertical direction, it can retract into the receiving groove.

[0191] For example, when the anchor body 200 is located in the puncture needle 20 and reaches the first position and before reaching the first position, the elastic protrusion protrudes from the side wall of the drive tube 300. Thus, when the anchor body 200 reaches the first position, the elastic protrusion is stopped at one side of the distal end locking structure 400. At this time, if the drive tube 300 is further pressed into the puncture needle 20, the elastic protrusion is pressed by the inner wall of the distal end locking structure 400 and retracts into the receiving groove, and the drive tube 300 can smoothly advance into the puncture needle 20.

[0192] In some other examples, the position limiting member 600 is removably installed on the drive tube 300. When the anchor body 200 moves from the first position to the distal end of the puncture needle 20, the position limiting member 600 is removed from the drive tube 300. In this way, the assembly process of the position limiting member 600 and the drive tube 300 can be simplified, and the disengagement of the position limiting member 600 from the side wall of the drive tube 300 can be made easier and faster. Also, the strength of the drive tube 300 can be ensured without damaging the integrity of the structure of the drive tube 300 itself.

[0193] Exemplarily, the position limiting member 600 may be a position limiting clamping plate. The position limiting clamping plate is installed by clamping the drive tube 300. When the anchor body 200 reaches the first position and further moves to the distal end of the puncture needle 20, the position limiting clamping plate is removed from the drive tube 300, and the drive tube 300 is further advanced along the puncture needle 20.

[0194] In some examples, the position limiting member 600 is installed at the end of the proximal end locking structure 500 of the anchor 10 facing the distal end locking structure 400. In this example, the predetermined distance is 0, that is, when the anchor body 200 is in the first position, its distal end is just aligned with the distal end of the puncture needle 20. The length of the position limiting member 600 is equal to the maximum length of the anchor body 200 extending from the distal end of the puncture needle 20.

[0195] In this way, when the position limiting member 600 reaches the end of the distal end locking structure 400 facing the proximal end locking structure 500 together with the drive tube 300, the proximal end locking structure 500 and the distal end locking structure 400 are just separated by the position limiting member 600. At this time, the distal end of the anchor body 200 is aligned with the distal end of the puncture needle 20. After removing the position limiting member 600, when the drive tube 300 further advances to the puncture needle 20 and the proximal end locking structure 500 moves to one end of the distal end locking structure 400, the moving distance of the drive tube 300 is the length of the position limiting member 600, and the moving distance of the anchor body 200 is also the length of the position limiting member 600. Thereby, the length of the anchor body 200 extending from the distal end of the puncture needle 20 is the length of the position limiting member 600.

[0196] By installing the position limiting member 600 at the end of the proximal end locking structure 500 facing the distal end locking structure 400, the operator can intuitively determine the maximum length of the anchor body 200 extending from the distal end of the puncture needle 20 based on the length of the position limiting member 600, thereby providing a highly reliable basis for the subsequent retraction distance of the traction line 100.

[0197] Exemplarily, the length of the position limiting member 600 is equal to the length of the anchor body 200. As a result, when the proximal end locking structure 500 moves to the end of the distal end locking structure 400, the proximal end of the anchor body 200 is exactly aligned with the distal end of the puncture needle 20. That is, the length of the anchor body 200 extending from the distal end of the puncture needle 20 is equal to the total length of the anchor body 200. In this way, when the proximal end locking structure 500 moves to the end of the distal end locking structure 400, the proximal end fixing portion 521 is released from the proximal end connecting member 510, the traction wire 100 is released, and by pulling back the traction wire 100, the anchor body 200 is rotated.

[0198] FIG. 10 is a schematic configuration diagram of an anchor body according to an embodiment of the present invention. FIG. 11 is a cross-sectional view of a state in which the anchor body and the traction wire in FIG. 10 are assembled. FIG. 12 is a cross-sectional view of the anchor body in FIG. 11. FIG. 13 is a partially enlarged view of portion C in FIG. 6. As shown in FIGS. 10 to 13, in some examples, a position limiting groove 210 and a side groove opening 210b communicating with the position limiting groove 210 are formed in the anchor body 200. Both the position limiting groove 210 and the side groove opening 210b extend along the length direction of the anchor body 200, and one end of both the position limiting groove 210 and the side groove opening 210b penetrates the proximal end of the anchor body 200. The length direction of the anchor body 200 can refer to the b direction in FIGS. 10 to 13.

[0199] The side groove opening 210b is an opening of the position limiting groove 210 located on the side wall of the anchor body 200. For ease of explanation, the two ends separated from each other in the length direction of the position limiting groove 210 are respectively referred to as the first end and the second end. The end penetrating the proximal end of the anchor body 200 is taken as the first end, and the end separated from the proximal end of the anchor body 200 is taken as the second end.

[0200] The fact that the first end of the position limiting groove 210 penetrates the proximal end of the anchor body 200 means that an end groove opening is formed at the first end of the position limiting groove 210. The end groove opening and the side groove opening 210b communicate with each other but have different directions.

[0201] When the proximal end of the anchor body 200 is located on the puncture needle 20, at least a part of the traction wire 100 is located within the position limiting groove 210, extends out of the anchor body 200 from the end groove opening of the position limiting groove 210, and extends within the drive tube 300. In the process of pulling and rotating the anchor body 200 by the traction wire 100, a part of the traction wire 100 detaches from the anchor body 200 from the side groove opening 210b.

[0202] Exemplarily, when fixing the traction wire 100, the traction wire 100 may be fixed at any position within the position limiting groove 210, or may be fixed at a position on the anchor body 200 other than the position limiting groove 210, as long as it can be guaranteed that a part of the traction wire 100 is accommodated within the position limiting groove 210.

[0203] In the embodiment of the present invention, by providing the position limiting groove 210 on the anchor body 200, the traction wire 100 is restricted in the radial direction of the anchor body 200. When the anchor body 200 is within the puncture needle 20, the traction wire 100 is positioned within the anchor body 200, the traction wire 100 is well accommodated, and it is possible to prevent the traction wire 100 from rubbing against the puncture needle 20 and depositing.

[0204] In some other examples, a mounting hole perpendicular to the longitudinal direction is formed within the anchor body 200. Thereby, the distal end of the traction wire 100 is fixed within the anchor body 200 and extends outside the anchor body 200 via the mounting hole. When the proximal end of the anchor body 200 is located on the puncture needle 20, the traction wire 100 extends within the drive tube 300 along the outer wall of the anchor body 200.

[0205] Referring to FIGS. 10 to 13, in order to rotate the anchor body 200 better, in some examples, a relief opening 240 is formed at an end (i.e., the first end) of the position limiting groove 210 that is located at the proximal end of the anchor body 200. One end of the relief opening 240 extends to the side groove opening 210b, and the other end of the relief opening 240 extends from the side groove opening 210b of the position limiting groove 210 to the side away from the axis l of the position limiting groove 210. The axis of the position limiting groove 210 coincides with the axis of the anchor body 200, that is, the position limiting groove 210 and the anchor body 200 are coaxially installed.

[0206] For the sake of convenience of description, the position limiting groove 210 has a first part with a relief opening 240 in the length direction and a second part for the other part in the length direction. The angle at which the groove wall of the second part of the position limiting groove 210 extends around the circumferential direction of the axis l is the second angle, and the angle at which the groove wall of the first part extends around the circumferential direction of the axis l is the first angle.

[0207] Both the first angle and the second angle are less than 360°. As a result, a side groove opening 210b is formed on the side wall of the anchor body 200, that is, the position limiting groove 210 is not closed in the circumferential direction. The first angle is smaller than the second angle, and thus a relief opening 240 is formed at the first end of the position limiting groove 210.

[0208] In some examples, the first angle decreases along the direction from the second part of the position limiting groove 210 to the proximal end of the anchor body 200, and the inclination degrees of the decrease are equal. Therefore, the end surface communicating with the side wall groove opening of the relief opening 240 is formed as an inclined plane. Of course, in some other examples, the inclination degrees of the decrease of the first angle in the direction from the second part of the position limiting groove 210 to the proximal end of the anchor body 200 are different. For example, when the inclination degree of the decrease gradually increases, the end surface communicating with the side wall groove opening of the relief opening 240 is formed as an arc-shaped surface.

[0209] In some examples, when the first angle does not change in the direction from the second part of the position limiting groove 210 to the proximal end of the anchor body 200, the end face communicating with the side wall groove opening of the relief opening 240 is a vertical plane perpendicular to the side groove opening, and the relief opening 240 has a horizontal plane perpendicular to the vertical plane, that is, the entire end face of the relief opening 240 is a right-angle face. In the embodiments of the present invention, the shape of the end face of the relief opening 240 is not limited.

[0210] In addition, the other end of the relief opening 240 extends to the side separated from the side groove opening 210b of the axis l of the position limiting groove 210, that is, the first angle of the end portion of the first part of the position limiting groove 210 located at the proximal end of the anchor body 200 is less than 180°, that is, the groove wall of the end portion of the first part of the position limiting groove 210 located at the proximal end of the anchor body 200 extends to a position lower than the plane where the axis l is located in the circumferential direction around the axis l, that is, the other end of the relief opening 240 and the axis l of the position limiting groove 210 are separated by a first distance in the radial direction of the anchor body 200 (see L in FIG. 13). The plane where the axis l is located and the groove bottom 210a are provided opposite to each other.

[0211] By configuring the relief opening 240 to be formed at the first end of the position limiting groove 210, one end of the relief opening 240 extends to the side groove opening 210b, and the other end of the relief opening 240 extends to the side separated from the side groove opening 210b of the axis l of the position limiting groove 210, the end face of the proximal end of the anchor body 200 other than the relief opening 240 abuts against the distal end of the drive tube 300, and the end of the relief opening 240 separated from the side groove opening 210b functions as the rotation fulcrum P of the anchor body 200.

[0212] When the proximal end of the anchor body 200 arrives at or immediately before arriving at the distal end of the puncture needle 20, by pulling the traction wire 100, the rotation fulcrum P receives the pushing force from the distal end of the drive tube 300, and since the rotation fulcrum P and the axis l of the position limiting groove 210 have a first distance, after the anchor body 200 receives the traction of the traction wire 100, the rotation fulcrum P receives the pushing action from the distal end of the drive tube 300, and a rotational torque is formed, whereby the anchor body 200 can be rotated better.

[0213] In some examples, a gap is provided between the other end of the escape port 240 (i.e., the pivot point P) and the groove bottom 210a of the position limiting groove 210. That is, the other end of the escape port 240 does not extend to the groove bottom 210a of the position limiting groove 210. At the proximal end of the anchor body 200, there is a portion perpendicular to the end face of the axis l. As a result, the distal end of the drive tube 300 can stably abut against the side of the end groove opening of the position limiting groove 210, without entering the position limiting groove 210 or swaying on the side of the end groove opening of the position limiting groove 210. The drive tube 300 can push the anchor body 200 to stably move along the puncture needle 20. The drive tube 300 can stably abut against the pivot point P and push it, and the anchor body 200 can stably rotate under the traction of the traction line 100.

[0214] The groove bottom 210a and the side groove opening 210b of the position limiting groove 210 are provided opposite to each other.

[0215] Exemplarily, the gap between the other end of the escape port 240 and the groove bottom 210a of the position limiting groove 210 is 5 mm or less, and is an appropriate value such as 1 mm, 3 mm or 5 mm. In the embodiments of the present invention, this gap is not limited.

[0216] In some examples, when the proximal end of the anchor body 200 is located on the puncture needle 20, the traction line 100 extends along the axis l of the position limiting groove 210, and the traction line 100 can pull the anchor body 200 along the axis l of the position limiting groove 210 to rotate the anchor body 200.

[0217] In some other examples, when the proximal end of the anchor body 200 is located on the puncture needle 20, the traction line 100 is located between the axis l of the position limiting groove 210 and the side groove opening 210b.

[0218] For ease of explanation, the side of the position - limiting groove 210 facing the side - groove opening 210b of the axis l is defined as the first side, and the side of the position - limiting groove 210 facing the rotation fulcrum P (or the groove bottom 210a) of the axis l is defined as the second side. The traction line 100 is installed on the first side of the position - limiting groove 210 and is away from the second side. That is, it is away from the side of the rotation fulcrum P. In this way, if the anchor body 200 is pulled along the side where the traction line 100 is separated from the rotation fulcrum P, the rotation torque of the anchor body 200 can be increased, and the anchor body 200 can rotate better under the traction of the traction line 100 and the pushing action of the drive tube 300.

[0219] In some examples, the distal end of the traction line 100 may be fixed at any position of the position - limiting groove 210. For example, it may be fixed inside the second end of a single position - limiting groove 210.

[0220] As shown in FIG. 10, in some other examples, a wire - accommodating chamber 220 is formed in the anchor body 200.

[0221] The wire - accommodating chamber 220 communicates with the groove chamber of the position - limiting groove 210 through a through - hole 210c. The distal end of the traction line 100 is restricted within the wire - accommodating chamber 220, and the traction line 100 extends from the through - hole 210c into the position - limiting groove 210.

[0222] Exemplarily, the wire - accommodating chamber 220 and the position - limiting groove 210 are provided at a distance in the length direction of the anchor body 200. As a result, the portion of the traction line 100 located within the anchor body 200 extends in the length direction of the anchor body 200.

[0223] The through hole 210c is located within the anchor body 200 and extends in the longitudinal direction of the anchor body 200. By providing the through hole 210c, the specific position of the traction wire 100 in the radial direction of the anchor body 200 can be better restricted, and the cooperation structure between the anchor body 200 and the traction wire 100 can be simplified. For example, the through hole 210c is provided on the axis l of the position limiting groove 210, that is, the axis l of the through hole 210c coincides with the axis l of the position limiting groove 210. In this way, when the distal end of the traction wire 100 is fixed within the wire accommodating chamber 220 and the traction wire 100 enters the position limiting groove 210 along the through hole 210c, the traction wire 100 can extend along the axis l of the position limiting groove 210. Similarly, when the through hole 210c is provided in the extension region on the first side of the position limiting groove 210, the traction wire 100 is restricted to the extension region on the first side of the position limiting groove 210.

[0224] In some examples, the distal end of the traction wire 100 is fixed within the wire accommodating chamber 220 by means such as adhesion or welding.

[0225] In some other examples, a first position limiting portion 110 is formed at the distal end of the traction wire 100, and the first position limiting portion 110 is provided to be locked within the wire accommodating chamber 220, whereby the distal end of the traction wire 100 is restricted within the wire accommodating chamber 220.

[0226] The width dimension of the first position limiting portion 110 is larger than the width dimension of the opening of the wire accommodating chamber 220, and the first position limiting portion 110 is restricted within the wire accommodating chamber 220 so that the distal end of the traction wire 100 is restricted within the wire accommodating chamber 220 and cannot pass through the groove opening of the wire accommodating chamber 220. Also, the dimension of the outer ring of the first position limiting portion 110 is larger than the first orifice of the through hole 210c, thereby ensuring that the first position limiting portion 110, that is, the distal end of the traction wire 100, is restricted within the wire accommodating chamber 220.

[0227] In some examples, the first position limiting part 110 may be movable into the wire accommodating chamber 220 or may be fixed within the wire accommodating chamber 220. In the embodiments of the present invention, this is not limited.

[0228] Exemplarily, the first position limiting part 110 and the distal end of the traction wire 100 are integral parts. For example, the first position limiting part 110 is a knot at the distal end of the traction wire 100. In some examples, the first position limiting part 110 is a block-shaped or spherical position limiting structure fixed to the distal end of the traction wire 100.

[0229] In some examples, when the anchor body 200 rotates to the anchor fixing position, the position where the traction wire 100 detaches from the anchor body 200 is at the central position in the longitudinal direction of the anchor body 200.

[0230] When the anchor body 200 rotates to the anchor fixing position, a part of the traction wire 100 is located inside the anchor body 200, and the other part detaches from the anchor body 200, that is, the other part is located outside the anchor body 200. Here, the position where the traction wire 100 detaches from the anchor body 200 (see M in FIG. 7) refers to the position on the anchor body 200 corresponding to the changing point between the part of the traction wire 100 located inside the anchor body 200 and the part located outside the anchor body 200.

[0231] By setting the position where the traction wire 100 detaches from the anchor body 200 at the central position in the longitudinal direction of the anchor body 200, the anchor body 200 will not deviate from the anchor fixing position during the process of being pulled by the traction wire 100. That is, the angle formed by the anchor body 200 and the traction wire 100 will not deviate from the anchor fixing angle, and it can be ensured that the anchor body 200 can stably attach to the inner wall of the target tissue 40 without damaging the target tissue 40 during the process of being pulled by the traction wire 100.

[0232] When the anchor body 200 rotates to the position where the anchor is fixed, the position where the towing line 100 detaches from the anchor body 200 is the second end of the position limiting groove 210. Therefore, the second end of the position limiting groove 210 is extended to the central position of the anchor body 200, and the position where the towing line 100 detaches from the anchor body 200 is set to the central position of the anchor body 200.

[0233] In some examples, the distal end of the towing line 100 is directly fixed to the central position of the anchor body 200, for example, fixed to the second end of the position limiting groove 210.

[0234] In some other examples, the distal end of the towing line 100 is located between the central position of the anchor body 200 and the distal end of the anchor body 200. For example, the distal end of the towing line 100 is restricted within the above-mentioned wire accommodating chamber 220. Since the above-mentioned wire accommodating chamber 220 is located on the side of the position limiting groove 210 facing the distal end of the anchor body 200, for example, the wire accommodating chamber 220 is located between the central position of the anchor body 200 and the distal end of the anchor body 200, the distal end of the towing line 100 is displaced from the central position of the anchor body 200. For example, the wire accommodating chamber 220 is located between the central position of the anchor body 200 and the distal end of the anchor body 200, and the towing line 100 extends toward the proximal end of the anchor body 200.

[0235] As shown in FIGS. 11 to 12, in some examples, a mounting channel 260 is formed in the anchor body 200. One end of the mounting channel 260 communicates with the through hole 210c, and the other end of the mounting channel 260 penetrates through the distal end of the anchor body 200. For example, the mounting channel 260 is located on the side of the position limiting groove 210 facing the distal end of the anchor body 200, the through hole 210c is located between the mounting channel 260 and the position limiting groove 210, and the mounting channel 260 and the position limiting groove 210 are communicated with each other.

[0236] In some examples, an end cap 250 is provided at the distal end of the anchor body 200, the end cap 250 is fitted into the mounting channel 260 from the distal end of the anchor body 200, one end of the end cap 250 and the through hole 210c are provided separately, and a wire accommodation chamber 220 is formed between one end of the end cap 250 and the through hole 210c.

[0237] For example, the through hole 210c includes a first orifice and a second orifice provided separately in the longitudinal direction of the anchor body 200, the first orifice is provided facing the position limiting groove 210 and communicates with the position limiting groove 210, the second orifice is provided such that the end face where it is located is separated from one end of the end cap 250, and the wire accommodation chamber 220 is formed by the end face where the second orifice is located and one end of the end cap 250.

[0238] By providing the mounting channel 260 in the anchor body 200, and the mounting channel 260 extending to the distal end of the anchor body 200, and providing the end cap 250 at the distal end of the anchor body 200 to form the wire accommodation chamber 220, the structure of the anchor body 200 can be simplified and it can contribute to mounting the distal end of the traction wire 100 into the wire accommodation chamber 220.

[0239] FIG. 14 is a schematic configuration diagram of another type of anchor body according to an embodiment of the present invention. As shown in FIG. 14, in some other examples, a wire accommodation groove 220a recessed inward is provided in the side wall of the anchor body 200, and the groove chamber of the wire accommodation groove 220a is configured as the wire accommodation chamber 220.

[0240] The above specific embodiments further explain in more detail the objectives, technical solutions, and beneficial effects of the embodiments of the present invention. The above are only specific embodiments of the embodiments of the present invention and do not limit the protection scope of the embodiments of the present invention. Any modifications, equivalent substitutions, improvements, etc. made based on the technical solutions of the embodiments of the present invention belong to the protection scope of the embodiments of the present invention.

Explanation of Reference Numerals

[0241] 10 Anchor 20 Puncture Needle 100 Traction Line 200 Anchor Body 300 Drive Tube 400 Distal End Lock Structure 500 Proximal End Lock Structure 600 Position Limiting Member 21 Fixing Part 410 Distal End Connecting Member 420 Distal End Locking Member 430 First Accommodation Channel 510 Proximal End Connecting Member 520 Proximal End Locking Member 530 Second Accommodation Channel 411 Guide Part 421 Distal End Fixing Part 422 Distal End Locking Part 423 First Through Hole 521 Proximal End Fixing Part 522 Proximal End Locking Part 523 Second Through Hole 110 First Position Limiting Part 210 Position Limiting Groove 220 Wire Accommodation Chamber 220a Wire Accommodation Groove 240 Relief Opening 250 End Cap 260 Mounting Channel 410 Second Position Limiting Part 210a Groove Bottom 210b Side Groove Opening P Rotation Fulcrum 210c Through Hole

Claims

1. A tow line, an anchor body, and a drive tube, The traction line is a flexible member, the anchor body is connected to a distal end of the pull line and is retractable by the pull line; The drive tube is fitted around at least a portion of the traction line, and the anchor body is movable along the puncture needle by being driven by the drive tube, and is configured to rotate at an angle with the traction line after exiting the distal end of the puncture needle and be anchored to the inner wall of the target tissue. An anchor characterized by:

2. the drive tube is looped around the pull line, the anchor body being located toward a distal end of the drive tube; When the anchor body is positioned within the puncture needle, a proximal end of the anchor body and a distal end of the drive tube abut, thereby allowing the anchor body to rotate with the push of the drive tube and the pull of the pull line when the anchor body exits the puncture needle. The anchor of claim 1 .

3. the anchor further comprises a distal end locking structure; the distal end locking structure is fixed to a proximal end of the puncture needle, a first accommodating channel is formed in the distal end locking structure, the first accommodating channel is communicated with a needle channel of the puncture needle, a portion of the drive tube and the anchor body are positioned in the first accommodating channel, and the anchor body is configured to enter the needle channel of the puncture needle via the first accommodating channel by driving the drive tube; The distal locking structure is configured to selectively cooperate with the drive tube to lock the drive tube and the anchor body within the first receiving channel. The anchor of claim 2 .

4. The distal end locking structure includes a distal end connecting member and a distal end locking member, the distal end connecting member is fixed to a proximal end of the puncture needle, and the distal end connecting member is formed with at least a portion of the first receiving channel for passing the drive tube and the anchor body; The distal end locking member is provided on the distal end connecting member and is configured to selectively cooperate with the drive tube to lock and release the drive tube and the anchor body to and from the distal end connecting member.

4. The anchor of claim 3.

5. The distal end locking member includes a distal end fixing portion and a distal end locking portion, The first accommodation channel is formed in the distal end fixing portion, and the distal end fixing portion can be fixed to the distal end connecting member and released from the distal end connecting member, The distal end lock portion is located within the distal end fixing portion, when the distal end fixing portion is fixed to the distal end connecting member, the distal end locking portion cooperates with the distal end connecting member to act on the drive tube, thereby locking the drive tube and the anchor body; When the distal end fixing portion is released from the distal end connecting member, the distal end locking portion disengages from the distal end connecting member to release the drive tube and the anchor body.

5. The anchor of claim 4.

6. the distal end locking portion is a distal end elastic member fitted in the distal end fixing portion, the distal end elastic member having elasticity along at least a first direction, the first direction intersecting with an extension direction of the drive tube, when the distal end fixing portion is fixed to the distal end connecting member, the distal end elastic member is pressed by the distal end connecting member to come into contact with the drive tube along the first direction, thereby locking the drive tube and the anchor body; When the distal end fixing portion is released from the distal end connecting member, the distal end elastic member separates from the distal end connecting member and releases the driving tube and the anchor body in the process of rebounding.

6. The anchor of claim 5.

7. the distal end elastic member is a distal end elastic sleeve, a first through hole for passing the drive tube through the distal end elastic sleeve; When the distal end elastic sleeve is pressed by the distal end connecting member, the wall of the first through hole abuts against the drive tube to lock the drive tube and the anchor body, and after being separated from the distal end connecting member, the wall of the first through hole rebounds to release the drive tube and the anchor body.

7. The anchor of claim 6.

8. The distal end fixing portion is a distal end lock nut, and the distal end lock nut and the distal end connecting member are screw-connected.

7. The anchor of claim 6.

9. the anchor further comprises a proximal end locking structure; the proximal end locking structure is disposed at a proximal end of the drive tube and fixedly connected to the drive tube; A second receiving channel is formed in the proximal end locking structure, and the pull line is inserted into the second receiving channel; The proximal locking structure is configured to selectively cooperate with the pull line to lock the pull line to the drive tube. The anchor of claim 1 .

10. the proximal end locking structure includes a proximal end connecting member and a proximal end locking member; the proximal end connecting member is fixed to a proximal end of the drive tube, the proximal end connecting member having at least a portion of the second receiving channel formed therein for passing the pull line therethrough; A proximal end locking member is provided on the proximal end connecting member and is configured to selectively cooperate with the pull line to lock and release the pull line to and from the proximal end connecting member.

10. The anchor of claim 9.

11. The proximal end locking member includes a proximal end fixing portion and a proximal end locking portion, The second accommodation channel is formed in the proximal end fixing portion, and the proximal end fixing portion can be fixed to the proximal end connecting member and released from the proximal end connecting member; The proximal end lock portion is located within the proximal end fixing portion, When the proximal end fixing portion is fixed to the proximal end connecting member, the proximal end locking portion cooperates with the proximal end connecting member to act on the traction line to lock the traction line; When the proximal end fixing portion is released from the proximal end connecting member, the proximal end locking portion is disengaged from the proximal end connecting member to release the traction line. The anchor of claim 10.

12. The proximal end locking portion is a proximal end elastic member that is fitted into the proximal end fixing portion, and the proximal end elastic member has elasticity at least along a first direction, and the first direction intersects with an extension direction of the traction line, When the proximal end fixing portion is fixed to the proximal end connecting member, the proximal end elastic member is pressed by the proximal end connecting member to press against the traction line along the first direction, thereby locking the traction line; When the proximal end fixing portion is released from the proximal end connecting member, the proximal end elastic member separates from the proximal end connecting member and releases the traction line in the process of rebound. The anchor of claim 11.

13. the proximal end elastic member is a proximal end elastic sleeve; A second through hole for passing the traction line is formed in the proximal end elastic sleeve, When the proximal end elastic sleeve is pressed by the proximal end connecting member, the wall of the second through hole presses against the traction line to lock the drive tube, and after the proximal end elastic sleeve is released from the proximal end connecting member, the wall of the through hole rebounds to release the traction line.

13. The anchor of claim 12.

14. The proximal end fixing portion is a proximal end lock nut, and the proximal end lock nut and the proximal end connecting member are screwed together.

13. The anchor of claim 12.

15. The anchor further comprises a position limiting member, the position limiting member is selectively installed between the drive tube and the puncture needle; when the anchor body is located within the puncture needle and has a predetermined distance between the anchor body and a distal end of the puncture needle, the position limiting member cooperates with the drive tube and the puncture needle to limit movement of the drive tube on the puncture needle; In the process of the anchor body moving from the first position to the distal end of the puncture needle, the position limiting member is released from between the drive tube and the puncture needle, and the first position is the position of the anchor body when the anchor body has a predetermined distance from the distal end of the puncture needle. An anchor according to any one of claims 1 to 14.

16. the position limiting member is disposed between the proximal and distal locking structures of the anchor and selectively protrudes from a sidewall of the drive tube; when at least the anchor body is located within the puncture needle and has a predetermined distance between the anchor body and the distal end of the puncture needle, the position limiting member protrudes from a side wall of the drive tube, whereby the proximal end of the drive tube is stopped on the side of the proximal end of the puncture needle by the position limiting member; When the anchor body moves from the first position to the distal end of the puncture needle, the position limiting member disengages from the side wall of the drive tube.

16. The anchor of claim 15.

17. the position limiting member is removably mounted on the drive tube; When the anchor body moves from the first position to the distal end of the needle, the position limiting member is removed from the drive tube.

17. The anchor of claim 16.

18. The position limiting member is disposed at an end of the proximal end locking structure of the anchor facing the distal end locking structure, The predetermined distance is 0, and the length of the position limiting member is equal to the maximum length of the anchor body extending from the distal end of the puncture needle.

17. The anchor of claim 16.

19. a position limiting groove and a side groove opening communicating with the position limiting groove are formed in the anchor body, the position limiting groove and the side groove opening both extend in the length direction of the anchor body, and one end of the position limiting groove and one end of the side groove opening both penetrate to a proximal end of the anchor body; When the proximal end of the anchor body is located on the puncture needle, at least a portion of the traction line is located within the position limiting groove, and during the process of pulling and rotating the anchor body by the traction line, a portion of the traction line leaves the anchor body from the side groove opening. An anchor according to any one of claims 1 to 14.

20. A recess is formed at an end of the position limiting groove located at the proximal end of the anchor body, one end of the recess extends to the side groove opening, and the other end of the recess extends to a side of the axis of the position limiting groove that is spaced from the side groove opening.

20. The anchor of claim 19.

21. A gap is provided between the other end of the escape hole and a groove bottom of the position limiting groove, The groove bottom of the position limiting groove and the side groove opening are provided opposite to each other.

21. The anchor of claim 20.

22. When the proximal end of the anchor body is located on the puncture needle, the traction line extends along the axis of the position limiting groove; or When the proximal end of the anchor body is located on the puncture needle, the traction line is located between the axis of the position limiting groove and the side groove opening.

21. The anchor of claim 20.

23. A wire receiving chamber is formed in the anchor body, The wire accommodating chamber and the groove chamber of the position limiting groove are communicated with each other through a through hole, the distal end of the traction wire is restricted within the wire accommodating chamber, and the traction wire extends from the through hole into the position limiting groove.

20. The anchor of claim 19.

24. A first position limiting portion is formed at the distal end of the traction line, and the first position limiting portion is fitted into the wire receiving chamber, so that the distal end of the traction line is restricted within the wire receiving chamber.

24. The anchor of claim 23.

25. A wire receiving groove is provided in the side wall of the anchor body, and a groove chamber of the wire receiving groove is configured as the wire receiving chamber.

24. The anchor of claim 23.

26. an attachment channel is formed within the anchor body, one end of the attachment channel communicates with the through hole and the other end of the attachment channel extends through the distal end of the anchor body; an end cap is provided at a distal end of the anchor body, the end cap is fitted into the attachment channel from the distal end of the anchor body, and one end of the end cap is provided spaced apart from the through hole; The wire-receiving chamber is formed between one end of the end cap and the through hole.

24. The anchor of claim 23.

27. A puncture needle and the anchor according to any one of claims 1 to 14. The distal end of the puncture needle is configured to be inserted into a target tissue, The anchor body of the anchor is configured to move along the puncture needle by being driven by the drive tube and enter the inside of the target tissue. An anchor device characterized by:

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