Anchor and anchor device

Abstract

Provided are an anchor device and an anchor capable of reducing the frictional force between the anchor body and tissue and reducing or avoiding damage to the tissue in the process of recovering the anchor body by pulling the anchor body with a recovery wire. 【Solution means】The anchor 10 includes a traction wire 100, an anchor body 200, a drive tube 300, and a recovery wire 400. The traction wire is a flexible member. The anchor body is connected to the distal end of the traction wire and can be pulled by the traction wire. The drive tube is looped around at least a part of the traction wire and is configured to move and drive the anchor body along a puncture needle to allow the anchor body to enter the target tissue. The recovery wire is connected to the anchor body and is configured to pull the anchor body to disengage the anchor body from the target tissue along the puncture channel of the target tissue.

Description

Technical Field

[0001] This application 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 patient's digestive tract, for example, in the endoscopic ultrasound-guided biliary drainage surgery, a fixed stent is implanted between the gallbladder and the intestinal tract, and the fixed stent is made to function as a fistula to realize the communication between the gallbladder and the intestinal tract.

[0003] To ensure the stability of the fixed stent, usually, an anchor is implanted into the gallbladder via the intestinal tract under endoscopy, 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, thereby realizing the anchor fixation of the gallbladder (fixation by the anchor). In addition, a recovery line is connected to the anchor body, and after the surgery is completed, the anchor body can be moved out of the body by pulling the recovery line.

[0004] Here, in the process of pulling and recovering the anchor body by the recovery line, due to the repulsive force between the anchor body and the traction line, the frictional force between the anchor body and the tissue channel wall such as the gallbladder is relatively large, and the tissue may be damaged.

Summary of the Invention

Problems to be Solved by the Invention

[0005] Embodiments of this application provide an anchor device and an anchor that can reduce the frictional force between the anchor body and the tissue and reduce or avoid damage to the tissue in the process of pulling the anchor body by the recovery line to recover the anchor body.

Means for Solving the Problems

[0006] In one aspect, embodiments of the present application provide an anchor. The anchor includes a traction line, an anchor body, a drive tube, and a recovery line, wherein 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 and is configured to drive the anchor body to move along the puncture needle so as to cause the anchor body to enter the target tissue, the recovery line is connected to the anchor body and is configured to pull the anchor body to disengage the anchor body from the target tissue along the puncture channel of the target tissue, and the puncture channel is a channel formed by puncturing the target tissue with the puncture needle.

[0007] In one embodiment, the drive tube is looped around the traction line, and the anchor body is located outside the distal end of the drive tube. 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, so that when the anchor body exits the puncture needle, the anchor body can rotate under the push of the drive tube and the pull of the traction line.

[0008] In one embodiment, a position limiting groove and a side groove opening communicating with the position limiting groove are formed on the anchor body. Both the position limiting groove and the side groove opening extend in the length direction of the anchor body, and 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 within the puncture needle, at least a part of the traction line is located within the position limiting groove, and in the process of pulling and rotating the anchor body by the traction line, a part of the traction line disengages from the anchor body through the side groove opening.

[0009] 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 side groove opening of the axis of the position limiting groove.

[0010] In one embodiment, a gap is provided between the other end of the escape opening and the 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. 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.

[0011] In one embodiment, when the anchor body rotates to the anchor fixing position, the position where the traction line separates from the anchor body is at the central position in the longitudinal direction of the anchor body.

[0012] In one embodiment, one end of the recovery line is located at the central position in the longitudinal direction of the anchor body, or one end of the recovery line is located between the central position in the longitudinal direction of the anchor body and the distal end of the anchor body, the distal end of the traction line is located between the central position and the distal end of the anchor body, the traction line extends to the proximal end of the anchor body, the recovery line extends to the distal end of the anchor body, extends out from the distal end of the anchor body, and is configured to drive the distal end of the anchor body to rotate into the puncture channel.

[0013] 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.

[0014] 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.

[0015] In one embodiment, a position limiting channel is further formed in the anchor body, the position limiting channel communicates with the wire accommodating chamber of the anchor body, one end of the position limiting channel penetrates through the distal end of the anchor body, One end of the recovery wire is fixed in the wire accommodating chamber, and the recovery wire extends from the distal end of the anchor body via the position limiting channel.

[0016] In one embodiment, a second position limiting portion is formed at one end of the recovery wire, and the second position limiting portion is locked in the wire accommodating chamber, whereby one end of the recovery wire is limited in the wire accommodating chamber.

[0017] In one embodiment, one end of the recovery wire is connected to the first position limiting portion at the distal end of the traction wire, the first position limiting portion is fitted in the wire accommodating chamber, and one end of the recovery wire is limited in the wire accommodating chamber.

[0018] In one embodiment, a wire accommodating groove recessed inward is provided on the side wall of the anchor body, and the groove chamber of the wire accommodating groove is configured as the wire accommodating chamber. The position limiting channel is a position limiting hole provided in the anchor body, and both ends of the position limiting hole penetrate through the wire accommodating groove and the distal end of the anchor body respectively.

[0019] In one embodiment, a mounting channel is formed in the anchor body, one end of the mounting channel communicates with the 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, the end cap is fitted into the mounting channel from the distal end of the anchor body, and one end of the end cap is provided at a distance from the through hole. A wire accommodating chamber is formed between one end of the end cap and the through hole, the inner chamber of the end cap is formed as the position limiting channel, the end cap has a first through hole for communicating the wire accommodating chamber and the position limiting channel at one end, and a second through hole for communicating the position limiting channel and the outside of the anchor body at the other end.

[0020] In one embodiment, at least a part of the recovery line is located within the drive tube and enters the target tissue by driving the drive tube. In other aspects, the embodiments of the present application further provide 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. The anchor body of the anchor is configured to move along the puncture needle by driving the drive tube and enter the target tissue.

Advantages of the Invention

[0021] The embodiments of the present application provide an anchor device and an anchor. By using a flexible member as the traction line and installing the traction line in the drive tube, when embedding the anchor body at one end of the traction line, first embed the puncture needle into the target tissue, and then drive the traction line and the anchor body along the puncture needle into the target tissue by the drive tube. 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 line. As a result, the anchor body is fixed to the inner wall of the target tissue, and by pulling the traction line, the target tissue can be moved by the anchor body and brought into close contact with other tissues. In addition, by using a flexible member as the traction line, no repulsive force is generated between the flexible member and the anchor body. In this way, during the process of recovering the anchor body by driving the recovery line, the anchor body does not repel outward during the process of returning along the puncture channel. As a result, the frictional force between the anchor body and the inner wall of the puncture channel can be reduced, and damage to the tissue (target tissue and the first tissue) can be reduced or avoided.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

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Figure 4b

Figure 4c

Figure 4d

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Mode for Carrying Out the Invention

[0023] For those skilled in the art to better understand the technical solution in the present application, hereinafter, with reference to the drawings used in the embodiments of the present application, the technical solution in the embodiments of the present application will be clearly and completely described. The described embodiments are only a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without using inventive capabilities also belong to the protection scope of the present application.

[0024] To fully understand this application, many specific details are described below. However, this application can be implemented in forms different from those described here. Therefore, the protection scope of this application is not limited to the specific embodiments disclosed below.

[0025] In the description of this application, 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 this application. Since it does not explicitly or implicitly imply that the corresponding device or element necessarily has a specific direction or is configured and operated in a specific direction, it does not limit this application. In this application, unless otherwise specified, when the first feature is located "above" or "below" the second feature, 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.

[0026] In this application, unless otherwise specified, terms such as "connected", "connected to", "fixed" 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 the two elements may interact with each other. When described as a direct connection, there is no intermediate structure between the two entities being connected, 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 this application according to specific situations.

[0027] Terms such as "first" and "second" in this application are only for the purpose of explanation and do not explicitly or implicitly imply relative importance or imply the number of technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly imply including at least one such feature.

[0028] 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 is made to function as a fistula to realize the communication between the two tissues. For example, in an endoscopic ultrasonography-guided biliary drainage operation, a fixed stent is implanted between the gallbladder and the intestinal tract, and the fixed stent is made to function as a fistula to realize the communication between the gallbladder and the intestinal tract.

[0029] Since the gallbladder and the intestinal tract are in a free state, it is relatively difficult to attach the fixed stent. In order to facilitate the attachment of the fixed stent, the embodiments of the present application provide an endoscopic ultrasound anchor system including an endoscope and an anchor device. FIG. 1 is a schematic diagram of a state in which a puncture needle and a traction wire are assembled according to an embodiment of the present application. FIG. 2 is a schematic configuration diagram when the anchor is in a first state according to an embodiment of the present application. FIG. 3 is a schematic configuration diagram when the anchor is in a second state according to an embodiment of the present application. FIG. 4a is a schematic configuration diagram of a first recovery state of the anchor according to an embodiment of the present application. FIG. 4b is a schematic configuration diagram of a second recovery state of the anchor according to an embodiment of the present application. FIG. 4c is a schematic configuration diagram of a third recovery state of the anchor according to an embodiment of the present application. FIG. 4d is a schematic configuration diagram of a fourth recovery state of the anchor according to an embodiment of the present application. As shown in FIGS. 1 to 3, the anchor device includes an anchor 10, and the anchor 10 includes a traction wire 100 and an anchor body 200. The anchor body 200 is connected to the distal end of the traction wire 100 (see 100b in FIG. 1).

[0030] When performing the surgery, first, under endoscopy, the anchor body 200 is implanted into the target tissue 40, for example, the gallbladder, via the first tissue 30, 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 40. By further pulling the traction line 100, the gallbladder is moved by the anchor body 200 and brought into close contact with 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 attaching a 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.

[0031] Continuing to refer to FIG. 1, the anchor device further includes a puncture needle 20. When implanting the anchor 10, first, the puncture needle 20 is implanted under endoscopy via 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 path 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, the embedding of the anchor body 200 into the gallbladder can be realized.

[0032] To facilitate the implantation of the anchor 10, in the related art, the traction line 100 is made of a rigid material and has a repulsive force between it and the anchor body 200. That is, the anchor body 200 has a force that repels it to the anchor fixation position. Here, the anchor fixation position is the position when the anchor body 200 and the traction line 100 form a predetermined angle. During the embedding process, the anchor body 200 is pushed by the rigid traction line 100 and moves along the needle channel of the puncture needle 20. When 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 line 100 under the action of the repulsive force. Thereby, by pulling the traction line 100, the gallbladder can be moved by the anchor body 200 and brought into close contact with the intestinal tract.

[0033] As shown in FIGS. 4a to 4d, the anchor 10 according to the embodiment of the present application further includes a recovery wire 400. The recovery wire 400 is connected to the anchor body 200. For example, one end of the recovery wire 400 (for example, the fixed end, see 400b in FIGS. 4a to 4d) is fixed to the anchor body 200, and the other end of the recovery wire 400 (for example, the free end) extends into the first tissue 30 through the puncture channels of the target tissue 40 and the first tissue 30. The puncture channel is a channel formed by puncturing with the puncture needle 20 in the target tissue 40 and the first tissue 30.

[0034] After the operation is completed, the grasping forceps are sent into the first tissue 30 via the forceps channel of the endoscope, and the free end of the recovery wire 400 is grasped and pulled back under the endoscope, so that the anchor body 200 is moved out of the body via the puncture channel and the forceps channel.

[0035] However, in the process of the recovery wire 400 pulling the anchor body 200, since the anchor body 200 has a repulsive force trying to return to the anchor fixing position, the frictional force between the anchor body 200 and the inner wall of the puncture channel is relatively large when the anchor body 200 passes through the puncture channel, damaging tissues such as the target tissue 40 and the first tissue 30.

[0036] Embodiments of the present application provide an anchor device and an anchor 10. The traction line 100 is made of a flexible member, and the traction line 100 is installed in the drive tube 300. In this way, when embedding the anchor body 200 at one end of the traction line 100, first embed the puncture needle 20 into the target tissue 40, and then use the drive tube 300 to drive the traction line 100 and the anchor body 200 along the puncture needle 20 to move into the target tissue 40. After the anchor body 200 exits from the distal end of the puncture needle 20, the anchor body 200 can rotate so as to form an angle with the traction line 100. Thus, the anchor body 200 is stopped on the inner wall of the target tissue 40, and by pulling the traction line 100, the target tissue 40 can be moved by the anchor body 200 and brought into close contact with other tissues. Also, by making the traction line 100 a flexible member, no repulsive force is generated between the flexible member and the anchor body 200. In this way, in the process of recovering the anchor body 200 by driving the recovery line 400, the anchor body 200 does not repel outward when returning along the puncture channel. Thereby, the frictional force between the anchor body 200 and the inner wall of the puncture channel can be reduced, and damage to the tissue (target tissue 40 and first tissue 30) can be reduced or avoided. Hereinafter, with reference to the drawings, the structure of the anchor device and the anchor 10 according to the embodiments of the present application will be described in detail.

[0037] As shown in FIGS. 1 to 4, embodiments of the present application provide an anchor device including an anchor 10 and a puncture needle 20. The distal end of the puncture needle 20 (see 20b in FIG. 1) is configured to be inserted into the interior of the target tissue 40. For example, when embedding the anchor 10, first embed the puncture needle 20 along the sheath of the endoscope into the first tissue 30, such as the intestinal tract, and then further embed the puncture needle 20 so that the distal end of the puncture needle 20 penetrates the tissue wall of the first tissue 30 and the tissue wall of the target tissue 40 to reach a predetermined position within the target tissue 40, such as the gallbladder. The predetermined position is a position where the distal end of the puncture needle 20 can be relatively well visualized.

[0038] Exemplarily, the puncture needle 20 includes, but is not limited to, a 19G ultrasonic puncture needle. In an embodiment of the present application, 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 material. In the embodiment of the present application, the material of the traction line 100 is not limited, as long as the traction line 100 can be made into a flexible member.

[0039] 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.

[0040] 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.

[0041] In other examples, the anchor body 200 may rotate in other ways. For example, the anchor body 200 may be driven to rotate by a driving member installed at the distal end of the puncture needle 20 or the traction line 100. In the embodiment of the present application, the rotation method of the anchor body 200 is not limited.

[0042] The anchor fixing angle is the angle formed by the anchor body 200 and the traction line 100 when the anchor body 200 pulls the target tissue 40 (for example, the gallbladder) to be closely attached to 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 closely attached. In the embodiment of the present application, the anchor fixing angle is not limited.

[0043] The anchor 10 according to the embodiment of the present application 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) by the drive of the drive tube 300 and move along the needle channel of the puncture needle 20. 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, the anchor fixing angle) with the traction line 100. Thereby, the anchor body 200 is stopped on the inner wall of the target tissue 40. By further pulling the traction line 100, the target tissue 40 is moved by the anchor body 200 to be in close contact with the outer wall of the first tissue 30, and the anchor fixation of the target tissue 40 is realized. 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, so that the drive tube 300 can move smoothly along the needle channel of the puncture needle 20.

[0044] As shown in FIG. 2, 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 close to the proximal end of the traction line 100 is exposed from the side of the proximal end of the drive tube 300. By the operator pulling the traction line 100 from the proximal end of the traction line 100, the anchor body 200 is driven and rotated by the traction line 100. The portion close to the distal end of the traction line 100 is located outside the drive tube 300 and is connected to the anchor body 200, and the rotation of the anchor body 200 can be realized. 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 a suitable 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, and 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.

[0045] The second length is the difference between the total length of the traction wire 100 and the first length, and is, for example, a suitable length such as 1 / 3 or 1 / 4 of the total length of the traction wire 100. In the embodiments of the present application, 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.

[0046] As shown in FIGS. 1 to 4d, the anchor 10 according to the embodiment of the present application further includes a recovery wire 400, the recovery wire 400 is connected to the anchor body 200, for example, the fixed end of the recovery wire 400 is fixed to the anchor body 200, and the free end of the recovery wire 400 can extend into the first tissue 30 through the puncture channels of the target tissue 40 and the first tissue 30. The puncture channel is the channel through which the puncture needle 20 passes in the target tissue 40 and the first tissue 30.

[0047] The recovery wire 400 is configured to pull the anchor body 200 to rotate the anchor body 200 and detach it from the target tissue 40 along the puncture channel of the target tissue 40. For example, after the operation is completed, the grasping forceps are sent into the first tissue 30 via the forceps channel of the endoscope, and the free end of the recovery wire 400 is grasped and pulled back under the endoscope, so that the anchor body 200 is sequentially moved out of the body through the puncture channel and the forceps channel. nel and the forceps channel.

[0048] The recovery wire 400 is a flexible member. The recovery wire 400 and the traction wire 100 may have the same or different materials, as long as it can be ensured that both the recovery wire 400 and the traction wire 100 are flexible members.

[0049] Hereinafter, with reference to FIGS. 1 to 4d, an example in which the first tissue 30 is the intestinal tract and the target tissue 40 is the gallbladder will be illustratively described for the process of embedding and the process of recovering the anchor 10.

[0050] After the puncture needle 20 is embedded at a predetermined position, the traction wire 100 and the anchor body 200 at the distal end of the traction wire 100 are pushed into the needle channel of the puncture needle 20 from the proximal end of the puncture needle 20 by the drive tube 300.

[0051] 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 side of the distal end of the drive tube 300, and by further pulling the traction wire 100, the anchor body 200 can be rotated so as to form an anchor fixing angle.

[0052] In this step, the fact that the anchor body 200 exits from the distal end of the puncture needle 20 means that the entire anchor body 200 may completely exit from the distal end of the puncture needle 20, or a part of the anchor body 200 may exit from the distal end of the puncture needle 20. As long as the proximal end of the anchor body 200 can be moved outside the distal end of the puncture needle 20 during the rotation process by pulling the traction wire 100.

[0053] The puncture needle 20 is pulled back so as to return it into the forceps channel of the endoscope, the drive tube 300 is pulled back into the puncture needle 20, and further, the puncture needle 20 is recovered together with the drive tube 300, and the traction wire 100 is left in the forceps channel.

[0054] By pulling the traction line 100, for example, by pulling the traction line 100 from the proximal end of the traction line 100, the anchor body 200 is attached to the inner wall of the gallbladder, and further the gallbladder is pulled to the outer wall of the intestinal tract to realize the anchor fixation of the gallbladder.

[0055] As shown in FIGS. 4a to 4d, after the operation is completed, the grasping forceps are sent into the first tissue 30 via the forceps channel of the endoscope, the proximal end of the recovery line 400 is grasped and pulled back under the endoscope, and the anchor body 200 rotates due to the traction of the recovery line 400, and one end of the anchor body 200 enters into the puncture channel and enters the first tissue 30 along the puncture channel, and further the anchor body 200 is moved out of the body along the forceps channel of the endoscope.

[0056] In the embodiment of the present application, since the traction line 100 is a flexible member, there is no repulsive force between the anchor body 200 and the traction line 100, that is, there is no repulsive force for the anchor body 200 to return to the anchor fixation position. Compared with the traction line 100 made of the above hard material, one end of the anchor body 200 can rotate relatively easily to the opening at one end of the puncture channel due to the traction of the recovery line 400, enter the puncture channel, and when one end of the anchor body 200 reaches the opening at one end of the puncture channel, it can reduce or avoid damaging the target tissue 40 caused by colliding with the inner wall of the target tissue 40.

[0057] Also, in the process of the anchor body 200 moving along the puncture channel, since there is no repulsive force for the anchor body 200 to return to the anchor fixation position, the frictional force between the anchor body 200 and the inner wall of the puncture channel is reduced, thereby reducing the damage to the inner wall of the puncture channel, that is, the target tissue 40 and the first tissue 30.

[0058] In the process of the anchor body 200 being pulled back along the puncture channel, the length direction of the anchor body 200 and the extending direction of the puncture channel may be parallel or may form an angle. For example, the angle is 30° or less, and may be an appropriate value such as 10°, 15°, 20° or 30°.

[0059] The extending direction of the puncture channel can be referred to as the a direction in FIGS. 4a to 4d, and the length direction of the anchor body 200 is the extending direction of the line connecting the proximal end of the anchor body 200 and the distal end of the anchor body 200.

[0060] In some examples, the drive tube 300 is looped around the traction line 100, and the anchor body 200 is located on the side of the distal end of the drive tube 300, that is, the drive tube 300 is looped around only the traction line 100, and the anchor body 200 is exposed outside the drive tube 300 and is located on the side of the distal end of the drive tube 300.

[0061] When the anchor body 200 is located within the puncture needle 20, the proximal end of the anchor body 200 (refer to 200a in FIG. 2) abuts against the distal end of the drive tube 300 (300b). As a result, when the anchor body 200 exits the puncture needle 20, for example, when the proximal end of the anchor body 200 exits from the distal end of the puncture needle 2010, the anchor body 200 can rotate by the pushing of the drive tube 300 and the traction of the traction line 100.

[0062] For example, in the process of embedding the anchor 10, the drive tube 300 first pushes the distal end of the anchor body 200 (refer to 200b in FIG. 2) and gradually enters into 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, and by pulling the traction line 100, the anchor body 200 can stably rotate by the pushing of the drive tube 300 and the traction of the traction line 100.

[0063] However, 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 traction of the traction wire 100.

[0064] 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 wire 100 is a flexible member, there is no repulsive force between the traction wire 100 and the anchor body 200, and when the anchor body 200 moves within the puncture needle 20, it only moves along the side wall of the puncture needle 20 without excessively contacting 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 stably moves 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.

[0065] In some other examples, the drive tube 300 is looped around the outer periphery of the traction wire 100 and the anchor body 200 (not shown), that is, both the anchor body 200 and the traction wire 100 are located within the drive tube 300. During the process of implanting the anchor 10, the distal end of the drive tube 300 gradually enters into 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 wire 100 to enter into the needle channel of the puncture needle 20. Then, 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. Subsequently, the drive tube 300 is pushed towards the distal end of the puncture needle 20, and 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 wire 100, the anchor body 200 can rotate stably under the pushing of the drive tube 300 and the pulling of the traction wire 100.

[0066] In some examples, a part of the anchor body 200 may be installed inside the drive tube 300, and another 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.

[0067] 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, without the anchor body 200 strongly contacting the side wall of the drive tube 300, the anchor body 200 and the inner wall of the drive tube 300 contact each other to such an extent that they allow relative movement between the anchor body 200 and the drive tube 300 when pulling back the drive tube 300, and 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 process of the drive tube 300 advancing.

[0068] FIG. 5 is a schematic configuration diagram of an anchor body according to an embodiment of the present application. FIG. 6 is a cross-sectional view of a state in which the anchor body, the traction wire, and the recovery wire in FIG. 5 are assembled. FIG. 7 is a cross-sectional view of the anchor body in FIG. 6. FIG. 8 is a partial enlarged view of portion A in FIG. 2. As shown in FIGS. 5 to 8, 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 in 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 through the proximal end of the anchor body 200. The length direction of the anchor body 200 refers to the b direction in FIGS. 5 to 8.

[0069] 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 the sake of convenience in description, both ends facing 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 spaced apart from the proximal end of the anchor body 200 is taken as the second end.

[0070] 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, and the end groove opening and the side groove opening 210b communicate with each other but have different orientations.

[0071] When the proximal end of the anchor body 200 is located in the puncture needle 20, at least a part of the traction wire 100 is located in 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 in 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.

[0072] 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.

[0073] In the embodiment of the present application, 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.

[0074] In some other examples, mounting holes perpendicular to the longitudinal direction are formed in the anchor body 200. As a result, 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 holes. When the proximal end of the anchor body 200 is located in the puncture needle 20, the traction wire 100 extends into the drive tube 300 along the outer wall of the anchor body 200.

[0075] Referring to FIGS. 6-8, in order to rotate the anchor body 200 better, in some examples, a relief opening 240 is formed at the 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 to the side that is spaced from the side groove opening 210b of 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.

[0076] For the sake of convenience of explanation, the position limiting groove 210 has a first part in the longitudinal direction that has the relief opening 240, and the other part in the longitudinal direction is the second part. 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 of the position limiting groove 210 extends around the circumferential direction of the axis l is the first angle.

[0077] Both the first angle and the second angle are less than 360°, whereby a side groove opening 210b is formed in 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, whereby the relief opening 240 is formed at the first end of the position limiting groove 210.

[0078] 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 decreasing gradients are equal. Therefore, the end face communicating with the side wall groove opening of the escape port 240 is formed as an inclined plane. Of course, in some other examples, the decreasing gradients 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 decreasing gradient gradually increases, the end face communicating with the side wall groove opening of the escape port 240 is formed as an arc-shaped surface.

[0079] Of course, 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 escape port 240 is a vertical plane perpendicular to the side groove opening, and the escape port 240 has a horizontal plane perpendicular to the vertical plane, that is, the entire end face of the escape port 240 is a right-angled surface. In the embodiments of the present application, the shape of the end face of the escape port 240 is not limited.

[0080] Also, the other end of the escape port 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 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 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 escape port 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. 8). The plane where the axis l is located and the groove bottom 210a are provided opposite to each other.

[0081] A relief port 240 is formed at the first end of the position limiting groove 210, one end of the relief port 240 extends to the side groove opening 210b, and the other end of the relief port 240 extends to the side spaced from the side groove opening 210b of the axis l of the position limiting groove 210. By configuring in this way, the other end faces of the proximal end of the anchor body 200 other than the relief port 240 abut against the distal end of the drive tube 300, and the end of the relief port 240 spaced from the side groove opening 210b functions as the rotation fulcrum P of the anchor body 200.

[0082] 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.

[0083] In some examples, a gap is provided between the other end of the relief port 240 (i.e., the rotation fulcrum P) and the groove bottom 210a of the position limiting groove 210, that is, the other end of the relief port 240 does not extend to the groove bottom 210a of the position limiting groove 210, and there is a portion perpendicular to the end face of the axis l at the proximal end of the anchor body 200. 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, and will not enter the position limiting groove 210 or sway 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 move stably along the puncture needle 20, the drive tube 300 can stably abut against the rotation fulcrum P and push it, and the anchor body 200 can rotate stably by the traction of the traction wire 100.

[0084] The groove bottom 210a and the side groove opening 210b of the position limiting groove 210 are provided opposite to each other. Exemplarily, the distance 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, for example. In the embodiments of the present application, this distance is not limited.

[0085] 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.

[0086] 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. For the sake of convenience 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, away from the side of the rotation fulcrum P. In this way, if the traction line 100 pulls the anchor body 200 along the side away 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.

[0087] 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, fixed inside the second end of a single position limiting groove 210. As shown in FIG. 6, in some other examples, a wire accommodating chamber 220 is formed in the anchor body 200.

[0088] 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 limited in the wire accommodating chamber 220, and the traction line 100 extends from the through hole 210c into the position limiting groove 210.

[0089] Exemplarily, the wire accommodation chamber 220 and the position limiting groove 210 are provided at intervals in the longitudinal direction of the anchor body 200, whereby the portion of the traction wire 100 located within the anchor body 200 extends along the longitudinal direction of the anchor body 200.

[0090] 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 accommodation 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.

[0091] In some examples, the distal end of the traction wire 100 is fixed within the wire accommodation chamber 220 by means such as adhesion or welding.

[0092] 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 restricted within the wire accommodation chamber 220, whereby the distal end of the traction wire 100 is restricted within the wire accommodation chamber 220.

[0093] The width dimension of the first position limiting part 110 is larger than the width dimension of the opening of the wire accommodating chamber 220, and the first position limiting part 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. Further, the dimension of the outer ring of the first position limiting part 110 is larger than the first orifice of the through hole 210c, whereby the first position limiting part 110 cannot enter the position limiting groove 210 from the through hole 210c, ensuring that the first position limiting part 110, that is, the distal end of the traction wire 100, is restricted within the wire accommodating chamber 220.

[0094] In some examples, the first position limiting part 110 may be movable within the wire accommodating chamber 220 or may be fixed within the wire accommodating chamber 220, and in the embodiments of the present application, this is not limited.

[0095] 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.

[0096] 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.

[0097] When the anchor body 200 rotates to the anchor fixing position, a part of the traction wire 100 is located within 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. 3) refers to the position on the anchor body 200 corresponding to the changing position between the part of the traction wire 100 located within the anchor body 200 and the part located outside the anchor body 200.

[0098] By setting the position where the traction line 100 detaches from the anchor body 200 to the central position in the longitudinal direction of the anchor body 200, during the process of the anchor body 200 being pulled by the traction line 100, it will not deviate from the anchor fixation position. That is, the angle formed by the anchor body 200 and the traction line 100 will not deviate from the anchor fixation angle, and it can be ensured that the anchor body 200 can stably adhere to the inner wall of the target tissue 40 without damaging the target tissue 40 during the process of being pulled by the traction line 100.

[0099] When the anchor body 200 rotates to the anchor fixation position, the position where the traction 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, so that the position where the traction line 100 detaches from the anchor body 200 is the central position of the anchor body 200.

[0100] In some examples, the distal end of the traction 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.

[0101] In some other examples, the distal end of the traction 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 traction line 100 is restricted within the above-mentioned wire accommodation chamber 220. Since the above-mentioned wire accommodation chamber 220 is located on the side of the position limiting groove 210 towards the distal end of the anchor body 200, for example, the wire accommodation 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 traction line 100 deviates from the central position of the anchor body 200. For example, the wire accommodation chamber 220 is located between the central position of the anchor body 200 and the distal end of the anchor body 200, and the traction line 100 extends towards the proximal end of the anchor body 200.

[0102] In some examples, the fixed end of the recovery line 400 is fixed to the central position in the longitudinal direction of the anchor body 200, or the fixed end of the recovery line 400 is located between the central position of the anchor body 200 and the distal end of the anchor body 200 (see FIG. 6).

[0103] As shown in FIGS. 4a to 4d, the recovery line 400 extends to the distal end of the anchor body 200, extends from the distal end of the anchor body 200 out of the anchor body 200, and is configured to drive the distal end of the anchor body 200 to rotate into the puncture channel.

[0104] In the above example, when the traction line 100 extends to the proximal end of the anchor body 200 and the traction line 100 and the anchor body 200 are located on the puncture needle 20, the traction line 100 extends from the proximal end of the anchor body 200 out of the anchor body 200. When the anchor body 200 rotates out of the puncture needle 20 to the anchor fixing position, the traction line 100 detaches from the anchor body 200 from the central position of the anchor body 200.

[0105] Therefore, by configuring the recovery line 400 to extend to the distal end of the anchor body 200 and extend out of the anchor body 200 from the distal end of the anchor body 200, the distal end of the anchor body 200 can be driven by the recovery line 400 to rotate into the puncture channel, without interfering with the traction line 100 located on the other side of the anchor body 200. Thus, it is possible to prevent the deposition of the traction line 100 from affecting the entry of the distal end of the anchor body 200 into the puncture channel, and improve the recovery efficiency of the anchor body 200.

[0106] In some examples, the fixed end of the recovery line 400 is directly fixed to the distal end of the anchor body 200 or the side wall close to the distal end.

[0107] As shown in FIG. 6, in some other examples, a position limiting channel 230 is formed in the anchor body 200. The position limiting channel 230 communicates with the wire accommodating chamber 220, and one end of the position limiting channel 230 penetrates through the distal end of the anchor body 200. The position limiting channel 230 is located on the side separated from the position limiting groove 210 of the wire accommodating chamber 220. The fixed end of the recovery line 400 is fixed within the line storage chamber 220, and the recovery line 400 extends from the distal end of the anchor body 200 via the position limiting channel 230.

[0108] The position limiting channel 230 is provided along the longitudinal direction of the anchor body 200. By providing the position limiting channel 230, the specific position of the recovery line 400 in the radial direction of the anchor body 200 can be better restricted, and the cooperation structure between the anchor body 200 and the recovery line 400 can be simplified. For example, the position limiting channel 230 is provided on the axis l of the anchor body 200. In this way, when the fixed end of the recovery line 400 is fixed within the line storage chamber 220 and the recovery line 400 extends from the position limiting channel 230 from the distal end of the anchor body 200, the recovery line 400 can extend along the axis l of the anchor body 200, and thus can contribute to the rotation of the anchor body 200.

[0109] In some examples, the fixed end of the recovery line 400 is fixed within the line storage chamber 220 by means such as adhesion or welding.

[0110] In some other examples, a second position limiting portion 410 is formed at the fixed end of the recovery line 400, and the second position limiting portion 410 is locked within the line storage chamber 220, whereby the fixed end of the recovery line 400 is restricted within the line storage chamber 220.

[0111] The width dimension of the second position limiting portion 410 is larger than the width dimension of the opening of the line storage chamber 220. The second position limiting portion 410 is locked within the line storage chamber 220, so that the fixed end of the recovery line 400 is restricted within the line storage chamber 220 and cannot pass through the groove opening of the line storage chamber 220.

[0112] Also, the dimension of the outer ring of the second position limiting portion 410 is larger than the dimension of the first through hole 250a, whereby the second position limiting portion 410 cannot enter from the first through hole 250a into the position limiting channel 230, ensuring that the second position limiting portion 410 is restricted within the line storage chamber 220, that is, the fixed end of the recovery line 400 is restricted within the line storage chamber 220.

[0113] In some examples, the second position limiting part 410 may be movable into the wire accommodating chamber 220 or may be fixed in the wire accommodating chamber 220. In the embodiments of the present application, this is not limited.

[0114] Exemplarily, the second position limiting part 410 and the fixed end of the recovery wire 400 are integral parts. For example, the second position limiting part 410 is the knot of the fixed end of the recovery wire 400. In some examples, the second position limiting part 410 is a block-shaped or spherical position limiting structure fixed to the fixed end of the recovery wire 400.

[0115] In some examples, the fixed end of the recovery wire 400 is connected to the second position limiting part 410 at the distal end of the traction wire 100, and the second position limiting part 410 is locked in the wire accommodating chamber 220, whereby the fixed end of the recovery wire 400 is restricted in the wire accommodating chamber 220.

[0116] In this example, to simplify the structure of the anchor 10, the recovery wire 400 and the traction wire 100 share one first position limiting part 110. In this example, the dimension of the outer ring of the first position limiting part 110 is larger than the dimension of the first through hole 250a, whereby the first position limiting part 110 cannot enter the position limiting channel 230 from the first through hole 250a, and the fixed ends of the traction wire 100 and the recovery wire 400 are respectively restricted in the wire accommodating chamber 220.

[0117] Exemplarily, the first position limiting part 110, the traction wire 100, and the recovery wire 400 are integral parts formed integrally, whereby the structure of the entire anchor 10 can be simplified and the assembly efficiency of the anchor 10 can be improved.

[0118] FIG. 9 is a schematic configuration diagram of the end cap in FIG. 8. As shown in FIGS. 5 to 9, 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 communicates with the position limiting groove 210.

[0119] 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 spaced apart, and a wire accommodating chamber 220 is formed between one end of the end cap 250 and the through hole 210c. Also, the inner chamber of the end cap 250 is formed as the above-mentioned position limiting channel 230.

[0120] For example, the through hole 210c includes a first hole opening and a second hole opening provided opposite to each other in the longitudinal direction of the anchor body 200. The first hole opening is provided facing the position limiting groove 210 and communicates with the position limiting groove 210. The second hole opening is provided such that the end surface where it is located is spaced apart from one end of the end cap 250, and the wire accommodating chamber 220 is formed by the end surface where the second hole opening is located and one end of the end cap 250.

[0121] Exemplarily, the interior of the end cap 250 has a hollow structure, and each of the two ends of the end cap 250 has a through hole. For the sake of convenience in explanation, the through hole at the end facing the wire accommodation chamber 220 of the end cap 250 is defined as the first through hole 250a, and the through hole at the end spaced apart from the wire accommodation chamber 220 of the end cap 250 is defined as the second through hole 250b. The first through hole 250a is configured to communicate the inner chamber of the end cap 250 (i.e., the position limiting channel 230) with the wire accommodation chamber 220, and the second through hole 250b is configured to communicate the inner chamber of the end cap 250 (i.e., the position limiting channel 230) with the outside of the anchor body 200. Thereby, the recovery wire 400 extends out of the anchor body 200 in sequence via the first through hole 250a, the inner chamber, and the second through hole 250b.

[0122] The inner chamber can function as the position limiting channel 230, the first through hole 250a is an opening at one end of the position limiting channel 230, and the second through hole 250b is an opening at the other end of the position limiting channel 230.

[0123] The anchor body 200 is provided with a mounting channel 260, and the mounting channel 260 extends to the distal end of the anchor body 200. By providing the end cap 250 at the distal end of the anchor body 200 to form the wire accommodation chamber 220 and the position limiting channel 230, the structure of the anchor body 200 can be simplified, which contributes to mounting the distal end of the traction wire 100 and the fixed end of the recovery wire 400 within the wire accommodation chamber 220.

[0124] FIG. 10 is a schematic configuration diagram of another type of anchor body according to an embodiment of the present application. As shown in FIG. 10, in some other examples, a wire accommodation groove 220a recessed inward is provided on 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.

[0125] In this example, the position-limiting channel 230 is a position-limiting hole 230a provided in the anchor body 200. Both ends of the position-limiting hole 230a penetrate through the wire accommodating groove 220a and the distal end of the anchor body 200 respectively, whereby the free end of the recovery wire 400 can extend from the wire accommodating groove 220a through the position-limiting hole 230a to the outside of the anchor body 200.

[0126] FIG. 11 is a partially enlarged view of an anchor according to an embodiment of the present application. In some examples, at least a part of the recovery wire 400 is located within the drive tube 300, whereby it enters the target tissue 40 by driving the drive tube 300.

[0127] For example, the fixed end of the recovery wire 400 is located within the wire accommodating chamber 220 of the anchor body 200, and the recovery wire 400 extends from the distal end of the anchor body 200 along the position-limiting channel 230, folds back, and enters the drive tube 300. By embedding at least a part of the recovery wire 400 within the drive tube 300, the recovery wire 400 is tensioned within the anchor 10, and in the process of driving the anchor body 200 to move along the puncture needle 20 by the drive tube 300, the recovery wire 400 advances together with the drive tube 300, and when the drive tube 300 is unintentionally pulled back, it can prevent the recovery wire 400 from depositing at the distal end of the drive tube 300 and affecting the forward movement and rotation of the anchor body 200.

[0128] In addition, by providing the free end of the recovery wire 400 within the drive tube 300, when the drive tube 300 is unintentionally pulled back, it can prevent the recovery wire 400 from depositing at the distal end of the drive tube 300 due to the friction between the recovery wire 400 and the inner wall of the needle channel of the puncture needle 20 and affecting the forward movement and rotation of the anchor body 200.

[0129] The above specific embodiments further elaborate on the objectives, technical solutions, and beneficial effects of the embodiments of this application. The above are merely specific embodiments of the embodiments of this application and do not limit the protection scope of the embodiments of this application. Any modifications, equivalent substitutions, improvements, etc. made based on the technical solutions of the embodiments of this application belong to the protection scope of the embodiments of this application.

Description of Reference Numerals

[0130] 10 Anchor 20 Puncture Needle 30 First Tissue 40 Target Tissue 100 Traction Wire 200 Anchor Body 300 Drive Tube 400 Recovery Wire 110 First Position Limiting Portion 210 Position Limiting Groove 220 Wire Accommodation Chamber 220a Wire Accommodation Groove 230 Position Limiting Channel 230a Position Limiting Hole 240 Relief Opening 250 End Cap 260 Mounting Channel 410 Second Position Limiting Portion 210a Groove Bottom 210b Side Groove Opening P Rotation Fulcrum 210c Through Hole 250a First Through Hole 250b Second Through Hole

Claims

1. The anchor includes a towing line, an anchor body, a drive tube, and a recovery line; 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 configured to be looped around at least a portion of the traction line and to drive the anchor body along the puncture needle to advance the anchor body into a target tissue; The retrieval line is connected to the anchor body and configured to pull the anchor body to detach the anchor body from the target tissue along a puncture channel in the target tissue, the puncture channel being a channel formed by puncturing the target tissue with the puncture needle. An anchor characterized by:

2. the drive tube is looped over the pull line, the anchor body being located exterior to 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, so that when the anchor body exits the puncture needle, the anchor body can rotate due to the push of the drive tube and the pull of the pull line. The anchor of claim 1 .

3. 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 along the length direction of the anchor body, and one end of the position limiting groove and 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. The anchor of claim 2 .

4. 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.

4. The anchor of claim 3.

5. 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.

5. The anchor of claim 4.

6. 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.

5. The anchor of claim 4.

7. When the anchor body is rotated to the anchor fixing position, the position where the traction line leaves the anchor body is at the center position in the longitudinal direction of the anchor body. The anchor of claim 1 .

8. One end of the recovery line is located at a center position in the longitudinal direction of the anchor body, or one end of the retrieval line is located between a center position in a longitudinal direction of the anchor body and a distal end of the anchor body; A distal end of the pull line is located between the center location and a distal end of the anchor body, the pull line extending to the proximal end of the anchor body, and the retrieval line extending to the distal end of the anchor and out of the anchor body from the distal end of the anchor body and configured to drive the distal end of the anchor body to pivot into the puncture channel.

8. The anchor of claim 7.

9. 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. The anchor according to any one of claims 3 to 6.

10. 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.

10. The anchor of claim 9.

11. A position limiting channel is further formed in the anchor, the position limiting channel is communicated with the wire receiving chamber of the anchor body, and one end of the position limiting channel penetrates the distal end of the anchor body; One end of the retrieval line is fixed within the line-receiving chamber, and the retrieval line extends from the distal end of the anchor body through the position limiting channel. The anchor of claim 10.

12. A second position limiting portion is formed at one end of the return line, and the second position limiting portion is engaged in the line accommodating chamber, thereby restricting the one end of the return line within the line accommodating chamber. The anchor of claim 11.

13. One end of the return line and a first position limiting portion at the distal end of the traction line are connected, and the first position limiting portion is fitted into the line accommodating chamber, thereby restricting the one end of the return line within the line accommodating chamber. The anchor of claim 11.

14. A wire receiving groove is provided in a side wall of the anchor body, the groove chamber of the wire receiving groove being configured as the wire receiving chamber; The position limiting channel is a position limiting hole provided in the anchor body, and both ends of the position limiting hole respectively pass through the wire receiving groove and the distal end of the anchor body. The anchor of claim 11.

15. 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, and an inner chamber of the end cap is formed as the position limiting channel. The end cap has a first through hole at one end thereof that communicates the wire receiving chamber with the position limiting channel, and a second through hole at the other end thereof that communicates the position limiting channel with the outside of the anchor body. The anchor of claim 11.

16. At least a portion of the retrieval line is located within the drive tube and enters the target tissue by driving the drive tube. The anchor according to any one of claims 1 to 6.

17. A puncture needle and the anchor according to any one of claims 1 to 8, 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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