Anchor and anchoring device

Abstract

The embodiment of the utility model provides an anchoring device and an anchor, and the anchoring device comprises a traction line which is a flexible part; the anchor is connected to the far end of the traction line and can be pulled by the traction line; at least part of the driving tube is arranged on at least part of the traction line in a sleeving mode, and the driving tube is configured to drive the anchor to move along the puncture needle so that the anchor can enter the target tissue; and the recovery line is connected with the anchor, the recovery line is configured to pull the anchor so that the anchor can be separated from the target tissue along the puncture channel of the target tissue, the friction force between the anchor and the tissue can be reduced in the process that the recovery line pulls the anchor to recover, and therefore damage to the tissue is relieved or avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of medical devices, and in particular, relates to an anchor and an anchoring device. Background Art

[0002] Endoscopic Ultrsonography (EUS) is a minimally invasive procedure for evaluating digestive tract and lung diseases. It involves medical procedures on the patient's gastrointestinal tract. For example, in gallbladder drainage surgery guided by endoscopic ultrasound, a fixation frame needs to be implanted between the gallbladder and the intestine. The fixation frame serves as a fistula to achieve connectivity between the gallbladder and the intestine.

[0003] In order to ensure the stability of the fixation frame, an anchor is usually implanted into the gallbladder through the intestine under the guidance of an endoscope. By pulling the traction line of the anchor outward, the anchor of the anchor drives the gallbladder to cling to the side wall of the intestine, thereby anchoring the gallbladder. In addition, a retrieval line is connected to the anchor. When the operation is completed, the retrieval line can be pulled to remove the anchor from the body.

[0004] However, when the retrieval line pulls the anchor to be retrieved, the friction between the anchor and the pulling line is relatively large, resulting in damage to the tissue. Utility Model Content

[0005] The embodiments of the present application provide an anchoring device and an anchor, which can reduce the friction between the anchor and the tissue during the process of the anchor being pulled back by the recovery line, thereby alleviating or avoiding damage to the tissue.

[0006] On the one hand, an embodiment of the present application provides an anchor, comprising:

[0007] A pulling wire, which is a flexible part;

[0008] an anchor connected to the distal end of the pull wire and capable of being pulled by the pull wire;

[0009] a driving tube, at least partially sleeved on at least a portion of the puller wire, and configured to drive the anchor to move along the puncture needle so that the anchor enters the target tissue;

[0010] The retrieval line is connected to the anchor, and is configured to pull the anchor so that the anchor is separated from the target tissue along the puncture channel of the target tissue; wherein the puncture channel is a channel formed on the target tissue by puncturing with a puncture needle.

[0011] In one embodiment, the drive tube is sleeved on the puller wire, and the anchor is located outside the distal end of the drive tube;

[0012] When the anchor is located in the puncture needle, the proximal end of the anchor abuts against the distal end of the driving tube, so that when the anchor extends out of the puncture needle, the anchor can be turned over under the abutment of the driving tube and the pulling of the pulling wire.

[0013] In one embodiment, a limiting groove and a side notch connected to the limiting groove are formed on the anchor, the limiting groove and the side notch both extend along the length direction of the anchor, and one end of the limiting groove and the side notch both pass through the proximal end of the anchor;

[0014] When the proximal end of the anchor is located at the puncture needle, at least a portion of the puller wire is located in the limiting groove, and when the puller wire pulls the anchor to flip, a portion of the puller wire is separated from the anchor from the side notch.

[0015] In one embodiment, a clearance opening is formed at one end of the limiting groove located at the proximal end of the anchor, one end of the clearance opening extends to the side groove opening, and the other end of the clearance opening extends to a side of the axis of the limiting groove facing away from the side groove opening.

[0016] In one embodiment, there is a distance between the other end of the avoidance opening and the bottom of the limiting groove;

[0017] Wherein, the groove bottom of the limiting groove is arranged opposite to the side groove opening.

[0018] In one embodiment, when the proximal end of the anchor is located at the puncture needle, the pull wire extends along the axis of the limiting groove; or,

[0019] When the proximal end of the anchor is located at the puncture needle, the pull wire is located between the axis of the limiting groove and the side notch.

[0020] In one embodiment, when the anchor is flipped to the anchoring position, the position where the pull wire leaves the anchor is located at the center of the anchor along the length direction.

[0021] In one embodiment, one end of the retrieval line is located at the center of the anchor along its length; or,

[0022] One end of the retrieval line is located between the center of the anchor along the length direction and the distal end of the anchor;

[0023] The distal end of the pull line is located between the center and the distal end of the anchor, and the pull line extends toward the proximal end of the anchor, the retrieval line extends toward the distal end of the anchor, and extends out of the anchor from the distal end of the anchor, and the retrieval line is configured to drive the distal end of the anchor to flip toward the puncture channel.

[0024] In one embodiment, a release cavity is formed on the anchor;

[0025] The wire-releasing cavity is communicated with the groove cavity of the limiting groove through the through hole, the distal end of the pulling wire is restricted in the wire-releasing cavity, and the pulling wire extends from the through hole into the limiting groove.

[0026] In one embodiment, a first limiting portion is formed at the distal end of the pull wire, and the first limiting portion is embedded in the wire-releasing cavity so that the distal end of the pull wire is restricted in the wire-releasing cavity.

[0027] In one embodiment, the anchor further forms a limiting channel, the limiting channel is communicated with the line-releasing cavity of the anchor, and one end of the limiting channel passes through the distal end of the anchor;

[0028] One end of the retrieval line is fixed in the line-releasing cavity, and the retrieval line extends out to the distal end of the anchor through the limiting channel.

[0029] In one embodiment, a second limiting portion is formed at one end of the recovery line, and the second limiting portion is clamped in the line-releasing cavity to restrict one end of the recovery line in the line-releasing cavity.

[0030] In one embodiment, one end of the retrieval line is connected to a first limiting portion at the distal end of the pulling line, and the first limiting portion is embedded in the line-releasing cavity so that one end of the retrieval line is restricted in the line-releasing cavity.

[0031] In one embodiment, a wire release groove is recessed inwardly on the side wall of the anchor, and the groove cavity of the wire release groove is configured as a wire release cavity;

[0032] The limiting channel is a limiting hole opened on the anchor, and two ends of the limiting hole respectively pass through the wire-laying groove and the far end of the anchor.

[0033] In one embodiment, a mounting channel is formed in the anchor, one end of the mounting channel is connected to the through hole, and the other end of the mounting channel penetrates to the distal end of the anchor;

[0034] The distal end of the anchor is provided with an end cap, which is embedded in the installation channel from the distal end of the anchor, and one end of the end cap is spaced apart from the through hole;

[0035] A wire-releasing cavity is formed between one end of the end cap and the through hole, and a limiting channel is formed in the inner cavity of the end cap. One end of the end cap has a first through hole to connect the wire-releasing cavity with the limiting channel, and the other end of the end cap has a second through hole to connect the limiting channel with the outside of the anchor.

[0036] In one embodiment, at least a portion of the retrieval wire is located in the driving tube so as to be driven by the driving tube into the target tissue.

[0037] On the other hand, an embodiment of the present application further provides an anchoring device, comprising:

[0038] a puncture needle, the distal end of which is configured to extend into the interior of the target tissue;

[0039] Anchor as described above;

[0040] The anchor of the anchor moves along the puncture needle under the drive of the driving tube to enter the target tissue.

[0041] The embodiment of the present application provides an anchoring device and an anchor, which is configured as a pull wire as a flexible member and is configured in a driving tube. Thus, when an anchor at one end of the pull wire needs to be implanted, a puncture needle can be implanted into the target tissue first, and then the pull wire and the anchor can be driven by the driving tube to move along the puncture needle toward the target tissue until the anchor extends out of the distal end of the puncture needle. The anchor can be flipped to have an angle with the pull wire, so that the anchor can be stopped at the inner wall of the target tissue, and the pull wire can be pulled so that the target tissue is closely attached to other tissues under the drive of the anchor. In addition, the pull wire is configured as a flexible member to avoid a rebound force between the flexible member and the anchor. Thus, when the retrieval line drives the anchor to be retracted, the anchor will not rebound outward when retreating along the puncture channel, thereby reducing the friction between the anchor and the inner wall of the puncture channel, thereby reducing or avoiding damage to the tissue (target tissue and first tissue). BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the assembly of a puncture needle and a pull wire provided in one embodiment of the present application;

[0043] Figure 2 is a structural schematic diagram of an anchor provided by an embodiment of the present application in a first state;

[0044] Figure 3 is a structural schematic diagram of an anchor provided by an embodiment of the present application in a second state;

[0045] Figure 4a This is a structural schematic diagram of a first recovery state of an anchor provided by an embodiment of the present application;

[0046] Figure 4b This is a structural schematic diagram of a second recovery state of an anchor provided by an embodiment of the present application;

[0047] Figure 4c This is a structural schematic diagram of a third recovery state of an anchor provided by an embodiment of the present application;

[0048] Figure 4d This is a structural schematic diagram of a fourth recovery state of an anchor provided by an embodiment of the present application;

[0049] Figure 5 is a schematic diagram of the structure of one of the anchors provided in one embodiment of the present application;

[0050] Figure 6 yes Figure 5 Assembly cross-sectional view of the anchor, pull line and retrieval line;

[0051] Figure 7 yes Figure 6 Cross-sectional view of the middle anchor;

[0052] Figure 8 yes Figure 2 A partial enlarged view of the middle A;

[0053] Fig. 9 yes Figure 8 Schematic diagram of the structure of the middle end cap;

[0054] Fig.10 is a schematic diagram of the structure of another anchor provided in one embodiment of the present application;

[0055] Fig.11 It is a partial structural schematic diagram of an anchor provided in one embodiment of the present application.

[0056] Description of reference numerals:

[0057] 10-anchor; 20-puncture needle; 30-first tissue; 40-target tissue;

[0058] 100-pulling line; 200-anchor; 300-driving tube; 400-retrieval line;

[0059] 110-first limiting part; 210-limiting groove; 220-wire release cavity; 220a-wire release groove; 230-limiting channel; 230a-limiting hole; 240-avoidance opening; 250-end cap; 260-installation channel; 410-second limiting part;

[0060] 210a-bottom of the groove; 210b-side notch; P-turning fulcrum; 210c-through hole; 250a-first through hole; 250b-second through hole;

[0061] 300a - proximal side of the driving tube; 300b - distal side of the driving tube;

[0062] 240a-one end of the avoidance opening; 240b-the other end of the avoidance opening. DETAILED DESCRIPTION

[0063] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0064] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific implementation methods disclosed below.

[0065] In the description of the present application, it should be understood that the terms "upper", "lower", "horizontal", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the present application, unless otherwise clearly specified and limited, a first feature being "upper" or "lower" than a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium.

[0066] In this application, unless otherwise clearly specified and limited, the terms "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected entities are not connected through an intermediate structure, but are only connected to form a whole through a connecting structure. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0067] In this application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0068] Endoscopic Ultrsonography (EUS) is a minimally invasive procedure for evaluating digestive tract and lung diseases. During medical procedures involving the patient's gastrointestinal tract, a fixation frame needs to be implanted between the two tissues being drained, and the fixation frame is used as a fistula to connect the two tissues. For example, in gallbladder drainage surgery guided by endoscopic ultrasound, a fixation frame needs to be implanted between the gallbladder and the intestine, and the fixation frame is used as a fistula to connect the gallbladder and the intestine.

[0069] Understandably, the process of installing the fixation frame becomes more difficult because the gallbladder and intestines are in a free state.

[0070] In order to facilitate the installation of the fixing frame, an embodiment of the present application provides an endoscopic ultrasound anchoring system, including an endoscope and an anchoring device. Figure 1 This is a schematic diagram of the assembly of a puncture needle and a pull wire provided in one embodiment of the present application; Figure 2 is a structural schematic diagram of an anchor provided by an embodiment of the present application in a first state; Figure 3is a structural schematic diagram of an anchor provided by an embodiment of the present application in a second state; Figure 4a This is a structural schematic diagram of a first recovery state of an anchor provided by an embodiment of the present application; Figure 4b This is a structural schematic diagram of a second recovery state of an anchor provided by an embodiment of the present application; Figure 4c This is a structural schematic diagram of a third recovery state of an anchor provided by an embodiment of the present application; Figure 4d 1 is a schematic diagram of the structure of the fourth recovery state of the anchor provided by an embodiment of the present application. Figures 1 to 3 As shown, the anchoring device includes an anchor 10, and the anchor 10 has a pull line 100 and an anchor 200. The anchor 200 is connected to the distal end of the pull line 100 (refer to Figure 1 100b).

[0071] When surgery is required, the anchor 200 can be implanted into the target tissue 40, such as the gallbladder, through the first tissue 30, such as the intestine, under the guidance of the endoscope. For example, the sheath of the endoscope can be first introduced into the intestine, and then the anchor 10 can be clamped along the sheath channel. When the anchor 200 of the anchor 10 reaches the gallbladder through the intestine, the pull line 100 is pulled outward so that the anchor 200 stops on the inner wall of the target tissue 40, and the pull line 100 is continued to be pulled so that the anchor 200 drives the gallbladder to be close to the side wall of the intestine, that is, the gallbladder is anchored, so that the gallbladder is stabilized on the outside of the intestine. On the one hand, it is convenient to install a fixing frame between the intestine and the gallbladder, and on the other hand, it also makes the fixing frame more stable between the intestine and the gallbladder.

[0072] Continue to refer to Figure 1 As shown, the anchoring device can also include a puncture needle 20. When the anchor 10 needs to be implanted, the puncture needle 20 can be implanted through the intestine and gallbladder in sequence under the guidance of an endoscope. When the distal end of the puncture needle 20, i.e., the needle tip, reaches a preset position in the gallbladder, the anchor 10 is moved along the needle track of the puncture needle 20 until the anchor 200 of the anchor 10 extends out of the distal end of the puncture needle 20, thereby achieving the purpose of implanting the anchor 200 into the gallbladder.

[0073] In order to facilitate the implantation of the anchor 10, in the related art, the pull wire 100 is formed of a hard material, and there is a rebound force between it and the anchor 200, that is, the anchor 200 has a force to rebound to the anchor position, wherein the anchor position is the position when the anchor 200 has a preset angle with the pull wire 100. During the implantation process, the anchor 200 moves along the needle track of the puncture needle 20 under the push of the hard pull wire 100 until the anchor 200 extends out of the needle head of the puncture needle 20. The anchor 200 will have a preset angle with the pull wire 100 under the action of the rebound force, thereby pulling the pull wire 100, so that the anchor 200 can drive the gallbladder to be close to the intestine.

[0074] Reference Figures 4a to 4dAs shown, the anchor 10 of the embodiment of the present application further includes a recovery line 400, and the recovery line 400 is connected to the anchor 200, for example, one end of the recovery line 400 (for example, a fixed end, see Figures 4a to 4d The other end (e.g., free end) of the recovery line 400 can extend from the puncture channel of the target tissue 40 and the first tissue 30 into the first tissue 30. The puncture channel is a channel formed by puncturing the target tissue 40 and the first tissue 30 by the puncture needle 20.

[0075] After the operation is completed, the grasping forceps can be extended into the first tissue 30 through the forceps channel of the endoscope, and the free end of the retrieval line 400 can be grasped under the endoscope and withdrawn, so that the anchor 200 is moved out of the body through the puncture channel and the forceps channel.

[0076] However, when the recovery line 400 pulls the anchor 200, the anchor 200 always has a rebound force to return to the anchoring position, which makes the friction between the anchor 200 and the inner wall of the puncture channel larger when passing through the puncture channel, thereby causing damage to tissues such as the target tissue 40 and the first tissue 30.

[0077] The embodiment of the present application provides an anchoring device and an anchor 10, by setting the pull wire 100 as a flexible member, and setting the pull wire 100 in the driving tube 300. In this way, when it is necessary to implant the anchor 200 at one end of the pull wire 100, the puncture needle 20 can be implanted into the target tissue 40 first, and then the pull wire 100 and the anchor 200 are driven by the driving tube 300 to move along the puncture needle 20 toward the target tissue 40 until the anchor 200 extends out of the distal end of the puncture needle 20. The anchor 200 can be flipped to have an angle with the pull wire 100, so that the anchor 200 can be stopped at the inner wall of the target tissue 40, so that the pull wire 100 can be pulled so that the target tissue 40 is tightly attached to other tissues under the drive of the anchor 200. In addition, by setting the pulling wire 100 as a flexible part, it is avoided that there is a rebound force between the flexible part and the anchor 200. In this way, when the recovery wire 400 drives the anchor 200 to recover, the anchor 200 will not rebound outward when retreating along the puncture channel, thereby reducing the friction between the inner wall of the puncture channel, and further reducing or avoiding damage to the tissue (target tissue 40 and the first tissue 30).

[0078] The structure of the anchoring device and the anchor 10 provided in the embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0079] See also Figures 1 to 4d As shown, the embodiment of the present application provides an anchoring device, including an anchor 10 and a puncture needle 20. The distal end of the puncture needle 20 (refer to Figure 120b) is configured to extend into the target tissue 40. For example, when the anchor 10 needs to be implanted, the puncture needle 20 can be first implanted into the first tissue 30, such as the intestine, along the cannula of the endoscope, and then the puncture needle 20 is implanted, so that the distal end of the puncture needle 20 passes through the tissue arm of the first tissue 30 and the tissue wall of the target tissue 40, and finally reaches a preset position in the target tissue 40, such as the gallbladder. The preset position is a position where the distal end of the puncture needle 20 can be better visualized.

[0080] Exemplarily, the puncture needle 20 may include, but is not limited to, a 19G ultrasonic needle.

[0081] In the embodiment of the present application, the anchor 10 includes a pull wire 100, which is a flexible member. For example, the pull wire 100 may be a flexible wire made of fiber material or other flexible materials. The embodiment of the present application does not limit the material of the pull wire 100, and it is only necessary to ensure that the pull wire 100 is a flexible member.

[0082] The anchor 10 includes an anchor 200 connected to the distal end of the pull wire 100 and can be pulled by the pull wire 100 .

[0083] In some examples, the anchor 200 may be flipped under the pulling of the puller wire 100 , so that an anchoring angle is formed between the anchor 200 and the puller wire 100 .

[0084] In other examples, the anchor 200 may be flipped in other ways. For example, the anchor 200 may be flipped by a driving member disposed at the distal end of the puncture needle 20 or the pull wire 100. The embodiment of the present application does not limit the flipping method of the anchor 200.

[0085] The anchoring angle is the angle between the anchor 200 and the pull line 100 when the target tissue 40, such as the gallbladder, is pulled close to the intestine. For example, the anchoring angle may be 90° or 90°±10°, and may be adjusted according to the angle of the side wall of the gallbladder so that the anchor 200 fits the side wall of the gallbladder. The embodiment of the present application does not limit the anchoring angle.

[0086] The anchor 10 of the embodiment of the present application includes a drive tube 300, which is at least partially sleeved on at least a portion of the pull line 100. The anchor 200 can move along the puncture needle 20 under the drive of the drive tube 300. For example, the anchor 200 can move from the proximal end of the puncture needle 20 (refer to Figure 120a) enters into the needle track of the puncture needle 20 and moves along the needle track of the puncture needle 20, and when extending out of the distal end of the puncture needle 20, it can be flipped under the pull of the pulling wire 100 to have an angle with the pulling wire 100, such as an anchoring angle, so that the anchor 200 stops at the inner wall of the target tissue 40, thereby continuing to pull the pulling wire 100, so that the target tissue 40 is driven by the anchor 200 to be tightly attached to the outer wall of the first tissue 30, thereby completing the anchoring of the target tissue 40.

[0087] For the convenience of description, the needle track of the puncture needle 20 may extend in the x direction, and the radial direction of the needle track may be in the y direction. The radial dimension of the drive tube 300 may be 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 track of the puncture needle 20.

[0088] Reference Figure 2 As shown, in some examples, the driving tube 300 can be entirely sleeved on the pull wire 100, for example, the driving tube 300 can be entirely sleeved on the first portion of the pull wire 100. When the anchor 200 is located outside the driving tube 300, the first portion can be the portion between the distal end 100b and the proximal end 100a of the pull wire 100, so that a portion of the pull wire 100 close to the proximal end extends from the proximal side 300a of the driving tube 300 and can be exposed on the proximal side of the driving tube 300, so that the operator can pull the pull wire 100 from the proximal end of the pull wire 100, so that the pull wire 100 drives the anchor 200 to flip, and also makes the portion of the pull wire 100 close to the distal end extend from the distal side 300b of the driving tube 300, and is located outside the driving tube 300, and can be connected to the anchor 200, so as to realize the flipping of the anchor 200.

[0089] In some other examples, a portion of the driving tube 300 may be sleeved on the pull wire 100. For example, a hole may be formed on the side wall of the driving tube 300, and the proximal end or the distal end of the pull wire 100 may extend out of the driving tube 300 from the hole. For example, a hole may be formed on the side wall of the driving tube 300 near the proximal end, and the proximal end of the pull wire 100 may extend out of the driving tube 300 from the hole.

[0090] When the anchor 200 is located inside the driving tube 300, the first portion may also be a portion between the distal end of the puller wire 100 and a position of a first length from the distal end. For example, the first length may be a suitable length such as 2 / 3 or 3 / 4 of the total length of the puller wire 100. That is, the proximal end (refer to Figure 1 100a) and a position of a second length from the proximal end can be exposed at the proximal side of the driving tube 300, so that the operator can pull the pull wire 100 from the proximal end of the pull wire 100, so that the pull wire 100 drives the anchor 200 to flip.

[0091] It can be understood that the second length is equal to the difference between the total length of the pull line 100 and the first length. For example, the second length can be a suitable length such as 1 / 3 or 1 / 4 of the total length of the pull line 100. The embodiment of the present application does not limit the first length and the second length, as long as it is ensured that the driving tube 300 can drive the pull line 100 and the anchor 200 to be smoothly implanted into the target tissue along the puncture needle 20, and the operator can pull the proximal end of the pull line 100 to turn the anchor 200 and anchor the target tissue on the outer wall of the first tissue.

[0092] Reference Figures 1 to 4d As shown, the anchor 10 of the embodiment of the present application further includes a retrieval line 400, which is connected to the anchor 200. For example, the fixed end of the retrieval line 400 is fixed to the anchor 200, and the free end of the retrieval line 400 can extend from the puncture channel of the target tissue 40 and the first tissue 30 into the first tissue 30. The puncture channel is a channel on the target tissue 40 and the first tissue 30 for the puncture needle 20 to pass through.

[0093] The retrieval line 400 is configured to pull the anchor 200 so that the anchor 200 is turned over and detached from the target tissue 40 along the puncture channel of the target tissue 40. For example, after the operation is completed, the grasping forceps can be extended into the first tissue 30 through the forceps channel of the endoscope, and the free end of the retrieval line 400 can be grasped under the endoscope and withdrawn, so that the anchor 200 is moved out of the body through the puncture channel and the forceps channel in sequence.

[0094] It is understandable that the recovery line 400 is a flexible member, and the materials of the recovery line 400 and the pulling line 100 can be the same or different, as long as the recovery line 400 and the pulling line 100 are both flexible members.

[0095] Reference Figures 1 to 4d As shown, the following takes the first tissue 30 as the intestine and the target tissue 40 as the gallbladder as an example to exemplarily illustrate the implantation process and the recovery process of the anchor 10:

[0096] After the puncture needle 20 is implanted in place, the pull wire 100 and the anchor 200 at the distal end of the pull wire 100 can be pushed from the proximal end of the puncture needle 20 into the needle track of the puncture needle 20 through the driving tube 300;

[0097] Continue to push the driving tube 300 to advance the anchor 200 toward the distal end of the puncture needle 20 until the anchor 200 extends out of the distal end of the puncture needle 20 and extends to the distal side of the driving tube 300, and then pull the pulling wire 100 to flip the anchor 200 to the anchoring angle.

[0098] It should be noted that, in this step, the anchor 200 extending out of the distal end of the puncture needle 20 means that the entire part of the anchor 200 completely extends out of the distal end of the puncture needle 20, or it may be that part of the anchor 200 extends out of the distal end of the puncture needle 20, as long as the pulling wire 100 is pulled so that the proximal end of the anchor 200 can move to the outside of the distal end of the puncture needle 20 during the flipping process.

[0099] The puncture needle 20 is withdrawn so that the puncture needle 20 is withdrawn into the clamp channel of the endoscope, and the driving tube 300 is withdrawn into the puncture needle 20; then the puncture needle 20 is withdrawn together with the driving tube 300, and the pulling wire 100 is left in the clamp channel. In addition, a part of the retrieval wire will be left in the first tissue 30, and the part left in the first tissue 30 is visible under the endoscope, and the other part, that is, the part connected to the anchor 200, is located in the target tissue 40.

[0100] The pull wire 100 is pulled, for example, from the proximal end of the pull wire 100 , so that the anchor 200 is first attached to the inner wall of the gallbladder, and then the gallbladder is pulled to the outer wall of the intestine to achieve anchoring of the gallbladder.

[0101] Reference Figures 4a to 4d As shown, after the operation is completed, the grasping forceps can be extended into the first tissue 30 through the forceps channel of the endoscope, and the free end of the retrieval line 400 can be grasped under the endoscope and withdrawn. The anchor 200 is flipped under the pull of the retrieval line 400, so that one end of the anchor 200 enters the puncture channel, and enters the first tissue 30 along the puncture channel, and then moves out of the body along the forceps channel of the endoscope.

[0102] In the embodiment of the present application, since the pull wire 100 is a flexible member, there is no resilience between the anchor 200 and the pull wire 100, that is, the anchor 200 does not have a resilience to restore to the anchored position. Compared with the above-mentioned example in which the pull wire 100 is made of a hard material, one end of the anchor 200 can be more easily flipped to one end of the puncture channel under the pull of the recovery wire 400, and continue to enter the puncture channel, thereby reducing or avoiding one end of the anchor 200 from colliding with the inner wall of the target tissue 40 when reaching the opening at one end of the puncture channel, thereby damaging the target tissue 40.

[0103] In addition, when the anchor 200 moves along the puncture channel, since the anchor 200 has no resilience to return to the anchored position, the friction between the anchor 200 and the inner wall of the puncture channel is reduced, thereby reducing damage to the inner wall of the puncture channel, i.e., the target tissue 40 and the first tissue 30.

[0104] It should be noted that, during the withdrawal of the anchor 200 along the puncture channel, the length direction of the anchor 200 and the extension direction of the puncture channel may be parallel or may have an angle, for example, the angle may be less than or equal to 30°, for example, the angle may be equal to a suitable angle value such as 10°, 15°, 20° or 30°.

[0105] The extension direction of the puncture channel can be referred to Figures 4a to 4d As shown in direction a, the length direction of the anchor 200 is the extending direction of the line between the proximal end of the anchor 200 and the distal end of the anchor 200.

[0106] In some examples, the driving tube 300 can be sleeved on the pull wire 100, and the anchor 200 is located on the distal side of the driving tube 300, that is, the driving tube 300 is only sleeved on the pull wire 100, and the anchor 200 is exposed outside the driving tube 300 and is located on the distal side of the driving tube 300.

[0107] When anchor 200 is located within puncture needle 20, the proximal end of anchor 200 (see Figure 2 200a) abuts against the distal end (300b) of the driving tube 300 so that when the anchor 200 extends out of the puncture needle 20, for example, when the proximal end of the anchor 200 pushes out of the distal end of the puncture needle 2010, the anchor 200 can flip under the abutment of the driving tube 300 and the pulling of the pulling wire 100.

[0108] For example, during the implantation of the anchor 10, the driving tube 300 may first push the distal end of the anchor 200 (see Figure 2 200b), gradually enters from the proximal end of the puncture needle 20 into the needle track of the puncture needle 20, and then the distal end of the driving tube 300 abuts the proximal end of the anchor 200, so that the anchor 200 is pushed toward the distal end of the puncture needle 20, until the anchor 200 extends out of the distal end of the puncture needle 20. For example, when the proximal end of the anchor 200 just reaches the distal end of the puncture needle 20, the driving tube 300 can continue to abut the anchor 200 and simultaneously pull the pulling wire 100, so that the anchor 200 can achieve stable flipping with the assistance of the abutment of the driving tube 300 and the pulling of the pulling wire 100.

[0109] Of course, in some examples, when the anchor 200 extends out of the distal end of the puncture needle 20 , it is not necessary for the driving tube 300 to abut against the anchor 200 , and the anchor 200 can be flipped under the pulling of the pull wire 100 .

[0110] When the anchor 200 is located in the puncture needle 20, the length direction of the anchor 200 may be parallel to the extension direction of the puncture needle 20, or may have an angle with the extension direction of the puncture needle 20. However, because the pull wire 100 is configured as a flexible member, there is no resilience between the pull wire 100 and the anchor 200, so that the anchor 200 will not excessively resist the side wall of the puncture needle 20 when moving in the puncture needle 20, and only moves along the side wall of the puncture needle 20, thereby reducing the friction between the anchor 200 and the puncture needle 20, ensuring that the anchor 200 moves stably along the puncture needle 20 under the drive of the driving tube 300, thereby improving the implantation stability and implantation efficiency of the anchor 200.

[0111] In some other examples, the driving tube 300 can be sleeved on the outer periphery of the pull wire 100 and the anchor 200 (not shown in the figure), that is, the anchor 200 and the pull wire 100 are both located in the driving tube 300. During the implantation process of the anchor 10, the distal end of the driving tube 300 can gradually enter the needle track of the puncture needle 20 from the proximal end of the puncture needle 20, so that the anchor 200 and part of the pull wire 100 enter the needle track of the puncture needle 20, and then push the driving tube 300, so that the driving tube 300 is advanced toward the distal end of the puncture needle 20, until the anchor 200 reaches the distal end of the puncture needle 20 driven by the driving tube 300, for example, the distal end of the driving tube 300 is flush with the distal end of the anchor 200, and the driving tube 300 is pushed toward the distal end of the puncture needle 20. 00 just reaches the distal end of the puncture needle 20, it indicates that the distal end of the anchor 200 reaches the distal end of the puncture needle 20, and then the driving tube 300 can be withdrawn, so that the anchor 200 is exposed from the driving tube 300, and the proximal end of the anchor 200 can be pressed against the distal end of the driving tube 300; then the driving tube 300 is continued to be pushed toward the distal end of the puncture needle 20, so that the anchor 200 is exposed from the puncture needle 20 under the push of the driving tube 300, until the proximal end of the anchor 200 just reaches the distal end of the puncture needle 20, the driving tube 300 can continue to press against the anchor 200, and at the same time pull the pulling line 100, so that the anchor 200 can achieve stable flipping with the assistance of the pressing of the driving tube 300 and the pulling of the pulling line 100.

[0112] Of course, in some examples, a portion of the anchor 200 can be set in the driving tube 300, and the other portion can be exposed outside the driving tube 300. When the distal end of the anchor 200 reaches the distal end of the puncture needle 20, the driving tube 300 can be retracted so that the proximal end of the anchor 200 abuts against the distal end of the driving tube 300, and the driving tube 300 is continuously pushed toward the distal end of the puncture needle 20, so that the anchor 200 is exposed from the puncture needle 20 under the push of the driving tube 300, until the proximal end of the anchor 200 just reaches the distal end of the puncture needle 20, the driving tube 300 can continue to abut against the anchor 200, so that the anchor 200 can achieve stable flipping with the assistance of the abutment of the driving tube 300 and the pulling of the pulling line 100.

[0113] It can be understood that in the above example, since the pull wire 100 is a flexible member, there is no resilience between the pull wire 100 and the anchor 200, so that the anchor 200 will not tightly contact the side wall of the driving tube 300, so that the degree of contact between the anchor 200 and the inner wall of the driving tube 300 can allow relative movement between the anchor 200 and the driving tube 300 when the driving tube 300 is withdrawn. It is only necessary to ensure that the anchor 200 and the pull wire 100 can be pushed to the distal end of the puncture needle 20 together during the advancement of the driving tube 300.

[0114] The anchoring device of the embodiment of the present application can also be used in ESD surgery. For example, during the process of cutting tissue in ESD surgery, the anchor 200 in the anchoring device can pull the mucosa to prevent the tissue from covering the electric knife and improve the surgical field of view.

[0115] Figure 5 is a schematic diagram of the structure of one of the anchors provided in one embodiment of the present application. Figure 6 yes Figure 5 Assembly section view of anchor, pull line and recovery line in the figure. Figure 7 yes Figure 6 Cross-sectional view of the middle anchor, Figure 8 yes Figure 2 A partial enlarged view of the A in the middle. Figures 5 to 8 As shown, in some examples, a limiting groove 210 and a side notch 210b connected to the limiting groove 210 may be formed on the anchor 200. The limiting groove 210 and the side notch 210b both extend along the length direction of the anchor 200, and one end of the limiting groove 210 and the side notch 210b both pass through the proximal end of the anchor 200. The length direction of the anchor 200 can be referred to as Figures 5 to 8 As shown in the direction b.

[0116] It can be understood that the side notch 210b can be an opening of the limiting groove 210 on the side wall of the anchor 200. For the convenience of description, the two opposite ends of the limiting groove 210 along the length direction can be respectively referred to as the first end and the second end, wherein the end passing through the proximal end of the anchor 200 is referred to as the first end, and the end facing away from the proximal end of the anchor 200 is referred to as the second end.

[0117] The first end of the limiting groove 210 penetrates to the proximal end of the anchor 200, which means that the first end of the limiting groove 210 is formed with an end notch, and the end notch is communicated with the side notch 210b and has a different direction.

[0118] When the proximal end of the anchor 200 is located at the puncture needle 20, at least a portion of the pull wire 100 is located in the limiting groove 210, and extends out of the anchor 200 from the end notch of the limiting groove 210 and extends into the driving tube 300. When the pull wire 100 pulls the anchor 200 to flip, a portion of the pull wire 100 is separated from the anchor 200 from the side notch 210b.

[0119] Exemplarily, when the pull wire 100 is fixed, it can be fixed at any position in the limiting groove 210 , or it can be fixed at a position in the anchor 200 other than the limiting groove 210 , as long as part of the pull wire 100 is ensured to be received in the limiting groove 210 .

[0120] In the embodiment of the present application, a limiting groove 210 is provided on the anchor 200 to limit the pull wire 100 in the radial direction of the anchor 200, so that when the anchor 200 is in the puncture needle 20, the pull wire 100 is located in the anchor 200, which plays a good storage role for the pull wire 100 and avoids the pull wire 100 rubbing against the puncture needle 20 and accumulating.

[0121] In some other examples, a mounting hole perpendicular to the length direction may be formed in the anchor 200, so that the distal end of the puller wire 100 is fixed in the anchor 200 and extends outside the anchor 200 through the mounting hole. When the proximal end of the anchor 200 is located at the puncture needle 20, the puller wire 100 extends into the driving tube 300 along the outer side wall of the anchor 200.

[0122] Reference Figures 6 to 8 As shown, in order to achieve better flipping of the anchor 200, in some examples, a relief opening 240 is formed at one end (i.e., the first end) of the limiting groove 210 located at the proximal end of the anchor 200, and one end 240a of the relief opening 240 extends to the side notch 210b, and the other end 240b of the relief opening 240 extends to the side of the axis l of the limiting groove 210 that is away from the side notch 210b. It should be noted that the axis of the limiting groove 210 is consistent with the axis of the anchor 200, that is, the limiting groove 210 and the anchor 200 are coaxially arranged.

[0123] For the convenience of description, the portion of the limiting groove 210 having the avoidance opening 240 in the length direction may be referred to as the first portion, and the other portion of the limiting groove 210 in the length direction may be referred to as the second portion. The angle at which the second portion of the groove wall of the limiting groove 210 extends circumferentially around the axis 1 is the second angle, and the angle at which the first portion of the groove wall extends circumferentially around the axis 1 is the first angle.

[0124] The first angle and the second angle are both less than 360°, so that a side notch 210b is formed on the side wall of the anchor 200, that is, the limiting groove 210 is not closed in the circumferential direction. The first angle is smaller than the second angle, so that the first end of the limiting groove 210 forms an avoidance opening 240.

[0125] In some examples, the first angle can be reduced in the direction from the second part of the limiting groove 210 to the proximal end of the anchor 200, and the slope of the reduction is equal, so that the end surface of the avoidance opening 240 communicating with the side wall notch is formed into an inclined plane. Of course, in other examples, when the slope of the first angle in the direction from the second part of the limiting groove 210 to the proximal end of the anchor 200 is different, for example, the reduction slope gradually increases, so that the end surface of the avoidance opening 240 communicating with the side wall notch is formed into an arc surface.

[0126] Of course, in some examples, the first angle remains unchanged in the direction from the second portion of the limiting groove 210 to the proximal end of the anchor 200, and the end surface of the avoidance opening 240 communicating with the side wall notch is a vertical surface perpendicular to the side notch, and the avoidance opening 240 has a horizontal surface perpendicular to the vertical surface, that is, the entire end surface of the avoidance opening 240 is a right-angle surface. The embodiment of the present application does not limit the shape of the end surface of the avoidance opening 240.

[0127] In addition, the other end of the avoidance opening 240 extends to the side of the axis l of the limiting groove 210 that is away from the side groove 210b, that is, the first angle of the end of the first part of the limiting groove 210 located at the proximal end of the anchor 200 is less than 180°, that is, the end groove wall of the first part of the limiting groove 210 located at the proximal end of the anchor 200 extends circumferentially around the axis l to a plane lower than the axis l, that is, the other end of the avoidance opening 240 has a first distance from the axis l of the limiting groove 210 in the radial direction of the anchor 200 (refer to Figure 8 It can be understood that the plane where the axis l is located is arranged opposite to the groove bottom 210a.

[0128] By forming an avoidance opening 240 at the first end of the limiting groove 210, and extending one end of the avoidance opening 240 to the side groove 210b, and the other end extending to the side of the axis l of the limiting groove 210 facing away from the side groove 210b, the other end surfaces of the proximal end of the anchor 200 except the avoidance opening 240 are abutted against the distal end of the driving tube 300, and the end of the avoidance opening 240 away from the side groove 210b serves as the turning fulcrum P of the anchor 200.

[0129] When the proximal end of the anchor 200 reaches or is about to reach the distal end of the puncture needle 20, the pulling wire 100 is pulled, so that the flipping fulcrum P is subjected to the resistance force of the distal end of the driving tube 300. Because the flipping fulcrum P has a first distance from the axis l of the limiting groove 210, after the anchor 200 is pulled by the pulling wire 100, the flipping fulcrum P is resisted by the distal end of the driving tube 300, thereby forming a flipping torque, so that the anchor 200 can achieve better flipping.

[0130] In some examples, there is a gap between the other end of the avoidance opening 240 (i.e., the flipping fulcrum P) and the bottom 210a of the limiting groove 210. In other words, the other end of the avoidance opening 240 does not extend to the bottom 210a of the limiting groove 210, so that the proximal end of the anchor 200 reserves a portion of the end surface perpendicular to the axis l, so that the distal end of the driving tube 300 can stably abut against the end notch side of the limiting groove 210 without entering into the limiting groove 210, or shaking on the end notch side of the limiting groove 210, so that the driving tube 300 can push the anchor 200 to move stably along the puncture needle 20, and the driving tube 300 can stably abut against the flipping fulcrum P, and pull the anchor 200 to flip stably under the pull of the pulling wire 100.

[0131] The groove bottom 210a of the limiting groove 210 is arranged opposite to the side groove opening 210b.

[0132] Exemplarily, the distance between the other end of the avoidance opening 240 and the bottom 210a of the limiting groove 210 can be less than or equal to 5 mm. For example, the distance can be a suitable value such as 1 mm, 3 mm or 5 mm. The embodiment of the present application does not limit the distance.

[0133] In some examples, when the proximal end of the anchor 200 is located at the puncture needle 20, the pull wire 100 can extend along the axis l of the limiting groove 210, so that the pull wire 100 pulls the anchor 200 along the axis l of the limiting groove 210, so that the anchor 200 is flipped.

[0134] In some other examples, when the proximal end of the anchor 200 is located at the puncture needle 20, the pull wire 100 may be located between the axis l of the limiting groove 210 and the side notch 210b. For the convenience of description, the side of the limiting groove 210 located at the axis l toward the side notch 210b may be referred to as the first side, and the side of the limiting groove 210 located at the axis l toward the flip fulcrum P (or the groove bottom 210a) may be referred to as the second side. The pull wire 100 is arranged on the first side of the limiting groove 210 to deviate from the second side, that is, the flip fulcrum P side. In this way, the pull wire 100 pulls the anchor 200 along the side away from the flip fulcrum P, which can increase the flipping torque of the anchor 200, so that the anchor 200 can achieve better flipping under the pulling of the pull wire 100 and the abutment of the driving tube 300.

[0135] In some examples, the distal end of the pull wire 100 can be fixed at any position of the limiting groove 210 , for example, can be fixed inside the second end of a single limiting groove 210 .

[0136] Reference Figure 6 As shown, in some other examples, a release cavity 220 may be formed on the anchor 200;

[0137] The wire release cavity 220 is connected to the groove cavity of the limiting groove 210 through the through hole 210 c , the distal end of the pull wire 100 is restricted in the wire release cavity 220 , and the pull wire 100 extends from the through hole 210 c into the limiting groove 210 .

[0138] Exemplarily, the wire release cavity 220 and the limiting groove 210 may be spaced apart along the length direction of the anchor 200 , so that the portion of the puller wire 100 located in the anchor 200 extends along the length direction of the anchor 200 .

[0139] The through hole 210c is located in the anchor 200 and extends along the length direction of the anchor 200. The provision of the through hole 210c can better limit the specific radial position of the pull wire 100 on the anchor 200 and simplify the matching structure of the anchor 200 and the pull wire 100. For example, the through hole 210c can be set on the axis l of the limiting groove 210, that is, the axis l of the through hole 210c coincides with the axis l of the limiting groove 210. In this way, when the distal end of the pull wire 100 is fixed in the wire release cavity 220 and the pull wire 100 enters the limiting groove 210 along the through hole 210c, the pull wire 100 can extend along the axis l of the limiting groove 210. Similarly, when the through hole 210c is set on the extension area of ​​the first side of the limiting groove 210, the pull wire 100 is limited to the extension area of ​​the first side of the limiting groove 210.

[0140] In some examples, the distal end of the puller wire 100 may be fixed in the wire release cavity 220 by bonding or welding.

[0141] In some other examples, a first limiting portion 110 is formed at the distal end of the pull wire 100 , and the first limiting portion 110 is clamped in the wire release cavity 220 to restrict the distal end of the pull wire 100 in the wire release cavity 220 .

[0142] It can be understood that the width dimension of the first limiting portion 110 is greater than the opening width dimension of the wire release cavity 220, so that the first limiting portion 110 is stuck in the wire release cavity 220, so that the distal end of the puller wire 100 is limited in the wire release cavity 220 and will not escape from the notch of the wire release cavity 220. In addition, the outer contour dimension of the first limiting portion 110 is greater than the first opening of the through hole 210c, so that the first limiting portion 110 will not enter the limiting groove 210 from the through hole 210c, ensuring that the first limiting portion 110, i.e. the distal end of the puller wire 100, is limited in the wire release cavity 220.

[0143] In some examples, the first limiting portion 110 may be movable in the wire-releasing cavity 220 , or may be fixed in the wire-releasing cavity 220 , which is not limited in the embodiments of the present application.

[0144] Exemplarily, the first stopper 110 can be an integral part with the distal end of the puller wire 100, for example, the first stopper 110 can be a knot at the distal end of the puller wire 100. In some examples, the first stopper 110 can also be a block or spherical stopper structure fixed at the distal end of the puller wire 100.

[0145] In some examples, when the anchor 200 is flipped to the anchoring position, the position where the pull wire 100 is detached from the anchor 200 is located at the center of the anchor 200 along the length direction.

[0146] It is understandable that when the anchor 200 is flipped to the anchoring position, a portion of the pull line 100 is located inside the anchor 200, and another portion is detached from the anchor 200, that is, another portion is located outside the anchor 200, and the pull line 100 is detached from the anchor 200 (refer to Figure 3 M) refers to the position on the anchor 200 where the turning point between the portion of the pull wire 100 located inside the anchor 200 and the portion located outside the anchor 200 corresponds to.

[0147] By setting the position where the pull wire 100 detaches from the anchor 200 at the center position of the anchor 200 along the length direction, the anchor 200 will not deviate from the anchoring position during the pulling process of the pull wire 100, that is, the angle between the anchor 200 and the pull wire 100 will not deviate from the anchoring angle, ensuring that the anchor 200 can stably fit against the inner wall of the target tissue 40 during the pulling process of the pull wire 100 without causing damage to the target tissue 40.

[0148] It can be understood that when the anchor 200 is flipped to the anchoring position, the position where the pull line 100 detaches from the anchor 200 is the second end of the limiting groove 210. Therefore, the second end of the limiting groove 210 can be extended to the center of the anchor 200 so that the position where the pull line 100 detaches from the anchor 200 is the center of the anchor 200.

[0149] In some examples, the distal end of the pull wire 100 may be directly fixed to the center of the anchor 200 , for example, may be fixed to the second end of the limiting groove 210 .

[0150] In some other examples, the distal end of the puller wire 100 may be located between the center of the anchor 200 and the distal end of the anchor 200. For example, the distal end of the puller wire 100 is confined within the wire release cavity 220. Since the wire release cavity 220 is located on the side of the limiting groove 210 facing the distal end of the anchor 200, for example, the wire release cavity 220 is located between the center of the anchor 200 and the distal end of the anchor 200, the distal end of the puller wire 100 deviates from the center of the anchor 200, for example, it may be located between the center of the anchor 200 and the distal end of the anchor 200, and the puller wire 100 extends toward the proximal end of the anchor 200.

[0151] In some examples, the fixed end of the retrieval line 400 is fixed to the center of the anchor 200 along the length direction, or the fixed end of the retrieval line 400 is located between the center of the anchor 200 and the distal end of the anchor 200 (see Figure 6 shown).

[0152] Reference Figures 4a to 4d As shown, the retrieval line 400 extends toward the distal end of the anchor 200 and extends out of the anchor 200 from the distal end of the anchor 200, and the retrieval line 400 is configured to drive the distal end of the anchor 200 to flip toward the puncture channel.

[0153] In the above example, the pull wire 100 extends toward the proximal end of the anchor 200, and when the pull wire 100 and the anchor 200 are located at the puncture needle 20, the pull wire 100 extends out of the anchor 200 from the proximal end of the anchor 200, and when the anchor 200 extends out of the puncture needle 20 and flips to the anchored position, the pull wire 100 detaches from the anchor 200 from the center position of the anchor 200.

[0154] Therefore, by extending the recovery line 400 toward the distal end of the anchor 200 and extending the anchor 200 from the distal end of the anchor 200, the recovery line 400 can drive the distal end of the anchor 200 to flip toward the puncture channel without interfering with the pulling line 100 located on the other side of the anchor 200, thereby avoiding the accumulation of the pulling line 100 and affecting the distal end of the anchor 200 from entering the puncture channel, thereby improving the recovery efficiency of the anchor 200.

[0155] In some examples, the fixed end of the retrieval line 400 can be directly fixed to the distal end of the anchor 200 or to the side wall near the distal end.

[0156] Reference Figure 6 As shown, in some other examples, a limiting channel 230 can be formed on the anchor 200, the limiting channel 230 is connected to the line release cavity 220, and one end of the limiting channel 230 passes through the distal end of the anchor 200. It can be understood that the limiting channel 230 is located on the side of the line release cavity 220 facing away from the limiting groove 210.

[0157] The fixed end of the retrieval line 400 is fixed in the line-releasing cavity 220 , and the retrieval line 400 extends out of the distal end of the anchor 200 through the limiting channel 230 .

[0158] The limiting channel 230 is arranged along the length direction of the anchor 200. The arrangement of the limiting channel 230 can better limit the specific radial position of the retrieval line 400 on the anchor 200, and simplify the matching structure of the anchor 200 and the retrieval line 400. For example, the limiting channel 230 can be arranged on the axis l of the anchor 200, so that when the fixed end of the retrieval line 400 is fixed in the line release cavity 220, and the retrieval line 400 extends from the limiting channel 230 to the distal end of the anchor 200, the retrieval line 400 can extend along the axis l of the anchor 200, so that the anchor 200 can be easily flipped.

[0159] In some examples, the fixed end of the recovery line 400 can be fixed in the line release cavity 220 by bonding or welding.

[0160] In some other examples, a second limiting portion 410 is formed at the fixed end of the recovery line 400 , and the second limiting portion 410 is clamped in the wire-releasing cavity 220 to restrict the fixed end of the recovery line 400 in the wire-releasing cavity 220 .

[0161] It can be understood that the width dimension of the second limiting portion 410 is larger than the opening width dimension of the wire-releasing cavity 220, so that the second limiting portion 410 is stuck in the wire-releasing cavity 220, so that the fixed end of the recovery line 400 is restricted in the wire-releasing cavity 220 and will not escape from the slot of the wire-releasing cavity 220.

[0162] In addition, the outer contour size of the second limiting portion 410 is larger than the size of the first through hole 250a, so that the second limiting portion 410 will not enter the limiting channel 230 from the first through hole 250a, ensuring that the second limiting portion 410 is confined in the wire release cavity 220, that is, the fixed end of the recovery line 400 is confined in the wire release cavity 220.

[0163] In some examples, the second limiting portion 410 may be movable in the wire-releasing cavity 220 , or may be fixed in the wire-releasing cavity 220 , which is not limited in the embodiments of the present application.

[0164] Exemplarily, the second stopper 410 can be an integral part with the fixed end of the recovery line 400, for example, the second stopper 410 can be a knot at the fixed end of the recovery line 400. In some examples, the second stopper 410 can also be a block or spherical stopper structure fixed to the fixed end of the recovery line 400.

[0165] In some examples, the fixed end of the retrieval line 400 is connected to the second limiting portion 410 at the distal end of the pulling line 100 , and the second limiting portion 410 is clamped in the wire release cavity 220 to restrict the fixed end of the retrieval line 400 in the wire release cavity 220 .

[0166] It is understandable that, in this example, the retrieval line 400 and the pull line 100 share a first limiting portion 110 to simplify the structure of the anchor 10. In this example, the outer contour size of the first limiting portion 110 needs to be larger than the size of the first through hole 250a, so that the first limiting portion 110 will not enter the limiting channel 230 from the first through hole 250a, so that the fixed ends of the pull line 100 and the retrieval line 400 are both limited in the line release cavity 220.

[0167] Exemplarily, the first limiting portion 110 , the pulling wire 100 and the recovery wire 400 may be an integrally formed one-piece component to simplify the structure of the entire anchor 10 and improve the assembly efficiency of the anchor 10 .

[0168] Fig. 9 yes Figure 8 Schematic diagram of the structure of the middle end cap. Figures 5 to 9 As shown, in some examples, a mounting channel 260 is formed on the anchor 200, one end of the mounting channel 260 is connected to the through hole 210c, and the other end of the mounting channel 260 passes through to the distal end of the anchor 200. For example, the mounting channel 260 is located on the side of the limiting groove 210 facing the distal end of the anchor 200, and the through hole 210c is located between the mounting channel 260 and the limiting groove 210, and connects the mounting channel 260 and the limiting groove 210.

[0169] In some examples, the distal end of the anchor 200 has an end cap 250, which is embedded in the installation channel 260 from the distal end of the anchor 200, and one end of the end cap 250 is spaced from the through hole 210c, and a line release cavity 220 is formed between the one end of the end cap 250 and the through hole 210c. In addition, the inner cavity of the end cap 250 forms the above-mentioned limiting channel 230.

[0170] For example, the through hole 210c has a first opening and a second opening that are relatively arranged along the length direction of the anchor 200, wherein the first opening faces the limiting groove 210 and is connected to the limiting groove 210, and the end face where the second opening is located is spaced apart from one end of the end cap 250, and the end face where the second opening is located and one end of the end cap 250 form a wire release cavity 220.

[0171] Exemplarily, the end cap 250 has a hollow structure inside, and both ends of the end cap 250 have through holes. For the convenience of description, the through hole at one end of the end cap 250 facing the line-releasing cavity 220 is called the first through hole 250a, and the through hole at one end of the end cap 250 facing away from the line-releasing cavity 220 is called the second through hole 250b. The first through hole 250a is used to connect the inner cavity of the end cap 250 (i.e., the limiting channel 230) with the line-releasing cavity 220, and the second through hole 250b is used to connect the inner cavity of the end cap 250 (i.e., the limiting channel 230) with the outside of the anchor 200, so that the recovery line 400 extends out of the outside of the anchor 200 through the first through hole 250a, the inner cavity and the second through hole 250b in sequence.

[0172] It can be understood that the inner cavity can be used as the limiting channel 230 , the first through hole 250 a is an opening at one end of the limiting channel 230 , and the second through hole 250 b is an opening at the other end of the limiting channel 230 .

[0173] By providing an installation channel 260 on the anchor 200, and the installation channel 260 extends to the distal end of the anchor 200, and providing an end cap 250 at the distal end of the anchor 200 to form a wire release cavity 220 and a limiting channel 230, the structural setting of the anchor 200 is simplified, and the distal end of the pulling line 100 and the fixed end of the recovery line 400 are conveniently assembled in the wire release cavity 220.

[0174] Fig.10 Schematic diagram of another anchor structure provided by an embodiment of the present application. Fig.10 As shown, in some other examples, the side wall of the anchor 200 is recessed inwardly to form a wire release groove 220 a , and the groove cavity of the wire release groove 220 a is configured as a wire release cavity 220 .

[0175] In this example, the limiting channel 230 is a limiting hole 230a opened on the anchor 200, and the two ends of the limiting hole 230a respectively penetrate the wire-releasing groove 220a and the distal end of the anchor 200, so that the free end of the recovery line 400 extends from the wire-releasing groove 220a through the limiting hole 230a to the outside of the anchor 200.

[0176] Fig.11 3 is a partial structural diagram of an anchor provided by an embodiment of the present application. In some examples, at least a portion of the recovery line 400 is located in the driving tube 300 so as to enter the target tissue 40 under the drive of the driving tube 300 .

[0177] For example, the fixed end of the retrieval line 400 is located in the line release cavity 220 of the anchor 200, and the retrieval line 400 extends out of the distal end of the anchor 200 along the limiting channel 230, and folds back into the driving tube 300. It can be understood that by embedding at least part of the retrieval line 400 in the driving tube 300, so that the retrieval line 400 can be tightened in the anchor 10, so that when the driving tube 300 drives the anchor 200 to move along the puncture needle 20, the retrieval line 400 can pass through the driving tube 300 to advance, thereby avoiding the situation that when the driving tube 300 is inadvertently withdrawn, the retrieval line 400 is accumulated at the distal end of the driving tube 300, which affects the advancement and flipping of the anchor 200.

[0178] In addition, by setting the free end of the recovery line 400 in the driving tube 300, it is avoided that when the driving tube 300 is inadvertently withdrawn, the recovery line 400 rubs against the inner wall of the needle channel of the puncture needle 20 and causes the recovery line 400 to accumulate at the far end of the driving tube 300, thereby affecting the advancement and flipping of the anchor 200.

[0179] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not used to limit the protection scope of the embodiments of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. An anchor, characterized in that: include: A pulling wire, wherein the pulling wire is a flexible member; an anchor connected to the distal end of the pull wire and capable of being pulled by the pull wire; a driving tube, at least partially sleeved on at least a portion of the puller wire, and configured to drive the anchor to move along the puncture needle so that the anchor enters the target tissue; A retrieval line is connected to the anchor, and the retrieval line is configured to pull the anchor so that the anchor is separated from the target tissue along the puncture channel of the target tissue; wherein the puncture channel is a channel formed on the target tissue by puncturing the puncture needle.

2. The anchor according to claim 1, characterized in that: The driving tube is sleeved on the pulling wire, and the anchor is located outside the distal end of the driving tube; When the anchor is located in the puncture needle, the proximal end of the anchor abuts against the distal end of the drive tube, so that when the anchor extends out of the puncture needle, the anchor can be turned over under the abutment of the drive tube and the pulling of the pull wire.

3. The anchor according to claim 2, characterized in that: A limiting groove and a side notch connected to the limiting groove are formed on the anchor, the limiting groove and the side notch both extend along the length direction of the anchor, and one end of the limiting groove and the side notch both pass through the proximal end of the anchor; When the proximal end of the anchor is located at the puncture needle, at least a portion of the pull wire is located in the limiting groove, and when the pull wire pulls the anchor to flip, a portion of the pull wire is separated from the anchor from the side notch.

4. The anchor according to claim 3, characterized in that: An escape opening is formed at one end of the limiting groove located at the proximal end of the anchor, one end of the escape opening extends to the side notch, and the other end of the escape opening extends to a side of the axis of the limiting groove facing away from the side notch.

5. The anchor according to claim 4, characterized in that: There is a distance between the other end of the avoidance opening and the bottom of the limiting groove; Wherein, the groove bottom of the limiting groove is arranged opposite to the side groove opening.

6. The anchor according to claim 4, characterized in that: When the proximal end of the anchor is located at the puncture needle, the pulling wire extends along the axis of the limiting groove; or, When the proximal end of the anchor is located at the puncture needle, the pulling wire is located between the axis of the limiting groove and the side notch.

7. The anchor according to claim 1, characterized in that: When the anchor is flipped to the anchoring position, the position where the pull wire is separated from the anchor is located at the center of the anchor along the length direction.

8. The anchor according to claim 7, characterized in that: One end of the recovery line is located at the center of the anchor along the length direction; or, One end of the retrieval line is located between the center of the anchor along the length direction and the distal end of the anchor; The distal end of the pull wire is located between the center position and the distal end of the anchor, and the pull wire extends toward the proximal end of the anchor, the recovery wire extends toward the distal end of the anchor, and extends out of the anchor from the distal end of the anchor, and the recovery wire is configured to drive the distal end of the anchor to flip toward the puncture channel.

9. The anchor according to any one of claims 3 to 6, characterized in that: A line-releasing cavity is formed on the anchor; The wire-releasing cavity is communicated with the groove cavity of the limiting groove through a through hole, the distal end of the pulling wire is restricted in the wire-releasing cavity, and the pulling wire extends from the through hole into the limiting groove.

10. The anchor according to claim 9, characterized in that: A first limiting portion is formed at the distal end of the pull wire, and the first limiting portion is embedded in the wire-releasing cavity so that the distal end of the pull wire is restricted in the wire-releasing cavity.

11. The anchor according to claim 10, characterized in that: The anchor also forms a limiting channel, the limiting channel is communicated with the line-releasing cavity of the anchor, and one end of the limiting channel passes through the distal end of the anchor; One end of the retrieval line is fixed in the line-releasing cavity, and the retrieval line extends out of the distal end of the anchor through the limiting channel.

12. The anchor according to claim 11, characterized in that: A second limiting portion is formed at one end of the recovery line, and the second limiting portion is clamped in the line-releasing cavity so that one end of the recovery line is restricted in the line-releasing cavity.

13. The anchor according to claim 11, characterized in that: One end of the recovery line is connected to the first limiting portion at the distal end of the pulling line.

14. The anchor according to claim 11, characterized in that: The side wall of the anchor is inwardly recessed with a wire-releasing groove, and the groove cavity of the wire-releasing groove is configured as the wire-releasing cavity; The limiting channel is a limiting hole opened on the anchor, and two ends of the limiting hole respectively pass through the wire-releasing groove and the distal end of the anchor.

15. The anchor according to claim 11, characterized in that: A mounting channel is formed in the anchor, one end of the mounting channel is communicated with the through hole, and the other end of the mounting channel penetrates to the distal end of the anchor; The distal end of the anchor has an end cap, the end cap is embedded in the installation channel from the distal end of the anchor, and one end of the end cap is spaced apart from the through hole; The wire-releasing cavity is formed between one end of the end cap and the through hole, the inner cavity of the end cap forms the limiting channel, and one end of the end cap has a first through hole to connect the wire-releasing cavity with the limiting channel, and the other end of the end cap has a second through hole to connect the limiting channel with the outside of the anchor.

16. The anchor according to any one of claims 1 to 6, characterized in that: At least a portion of the recovery wire is located in the driving tube so as to enter the target tissue under the drive of the driving tube.

17. An anchoring device, characterized in that: include: a puncture needle, the distal end of which is configured to extend into the interior of the target tissue; The anchor as claimed in any one of claims 1 to 16; The anchor of the anchor moves along the puncture needle under the drive of the driving tube to enter into the target tissue.

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