Anchor and anchoring device

Abstract

The embodiment of the invention 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] This application belongs to the field of medical device technology, and in particular relates to an anchor and an anchoring device. Background Technology

[0002] Endoscopic ultrasound (EUS) is a minimally invasive surgical procedure used to assess diseases of the digestive tract and lungs. It involves medical procedures on the patient's gastrointestinal tract, such as endoscopic ultrasound-guided gallbladder drainage, which requires the implantation of a fixation device between the gallbladder and the intestine. This fixation device acts as a fistula to connect the gallbladder and the intestine.

[0003] To ensure the stability of the fixation device, an anchor is typically implanted into the gallbladder via the intestine under endoscopic guidance. By pulling the traction wire of the anchor, the anchor pulls the gallbladder tightly against the intestinal wall, thus anchoring the gallbladder. Additionally, a retrieval suture is attached to the anchor; after the procedure, the anchor can be removed from the body by pulling the retrieval suture.

[0004] However, during the retrieval process, the elastic force between the anchor and the traction line causes significant friction between the anchor and the walls of tissue channels such as the gallbladder, which can damage the tissue. Summary of the Invention

[0005] This application provides an anchoring device and anchor that 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 one hand, embodiments of this application provide an anchor, including:

[0007] The tension wire is a flexible component.

[0008] An anchor is attached to the far end of a pull line and can be pulled by the pull line.

[0009] A drive tube, at least partially sleeved on at least a portion of the pull wire, is configured to drive the anchor along the puncture needle to allow the anchor to enter the target tissue;

[0010] A retrieval line, connected to an anchor, is configured to pull the anchor so that the anchor detaches from the target tissue along a puncture channel; wherein the puncture channel is a channel formed in the target tissue by a puncture needle.

[0011] In one embodiment, the drive tube is sleeved on the tension line and anchored outside the distal end of the drive tube.

[0012] When the anchor is inside 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 flipped under the pressure of the drive tube and the pull of the traction line.

[0013] In one embodiment, a limiting groove and a side groove communicating with the limiting groove are formed on the anchor. Both the limiting groove and the side groove extend along the length direction of the anchor, and one end of the limiting groove and the side groove penetrates 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 pull line is located within the limiting groove, and during the process of the pull line pulling the anchor to flip, a portion of the pull line detaches from the anchor from the side groove.

[0015] In one embodiment, a clearance opening is formed at one end of the limiting groove near the anchor, one end of the clearance opening extends to the side groove opening, and the other end of the clearance opening extends to the side of the limiting groove opposite to the axis of the side groove opening.

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

[0017] The bottom of the limiting groove is positioned opposite to the side opening.

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

[0019] When the proximal end of the anchor is located at the puncture needle, the traction line is located between the axis of the limiting groove and the side groove opening.

[0020] In one embodiment, when the anchor is flipped to the anchoring position, the pull line is detached from the anchor at the center of the anchor along its length.

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

[0022] One end of the recovery line is located between the center of the anchor along its length and the far end of the anchor;

[0023] The pull line is located between the center and the far end of the anchor, and extends towards the near end of the anchor. The retrieval line extends towards the far end of the anchor and extends from the far end of the anchor. The retrieval line is configured to cause the far end of the anchor to flip towards the puncture channel.

[0024] In one embodiment, a line-laying cavity is formed on the anchor;

[0025] The wire feeding cavity and the limiting groove are connected by a through hole. The far end of the pull wire is confined in the wire feeding cavity, and the pull 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 release cavity so that the distal end of the pull wire is restricted within the wire release cavity.

[0027] In one embodiment, the anchor also forms a limiting channel, which is connected to the line-laying cavity of the anchor, and one end of the limiting channel extends through the distal end of the anchor.

[0028] One end of the retrieval line is fixed inside the line-laying cavity, and the retrieval line extends beyond the far end of the anchor through a limiting channel.

[0029] In one embodiment, a second limiting portion is formed at one end of the retrieval line, and the second limiting portion is engaged in the wire feeding cavity so that one end of the retrieval line is restricted within the wire feeding cavity.

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

[0031] In one embodiment, the sidewall of the anchor is recessed inward to form a line-laying groove, and the groove cavity of the line-laying groove is configured as a line-laying cavity.

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

[0033] In one embodiment, an installation channel is formed inside the anchor, one end of which communicates with a through hole, and the other end of which extends to the distal end of the anchor.

[0034] The anchor has an end cap at its distal end, which is embedded in the installation channel from the distal end of the anchor, with one end spaced apart from the through hole.

[0035] One end of the end cap forms a wire-laying cavity with the through hole, the inner cavity of the end cap forms a limiting channel, and one end of the end cap has a first through hole to connect the wire-laying cavity and the limiting channel, and the other end of the end cap has a second through hole to connect the limiting channel and the outside of the anchor.

[0036] In one embodiment, at least a portion of the recovery line is located within a drive tube to enter the target tissue under the drive of the drive tube.

[0037] On the other hand, embodiments of this application also provide an anchoring device, including:

[0038] The distal end of the puncture needle is configured to extend into the target tissue.

[0039] Anchors as described above;

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

[0041] This application provides an anchoring device and anchor. By setting the traction wire as a flexible element and placing it inside a drive tube, when an anchor needs to be implanted at one end of the traction wire, a puncture needle can be first inserted into the target tissue. Then, the drive tube drives the traction wire and anchor to move along the puncture needle towards the target tissue until the anchor extends beyond the distal end of the puncture needle. At this point, the anchor can be flipped to form an angle with the traction wire, allowing it to stop against the inner wall of the target tissue. Thus, by pulling the traction wire, the target tissue is brought into close contact with other tissues by the anchor. Furthermore, by setting the traction wire as a flexible element, the rebound force between the flexible element and the anchor is avoided. Therefore, during the retrieval process, when the anchor is retracted along the puncture channel, it will not rebound outwards, thereby reducing the friction between the anchor and the inner wall of the puncture channel, and thus reducing or avoiding damage to the tissues (target tissue and first tissue). Attached Figure Description

[0042] Figure 1 This is an assembly diagram of the puncture needle and traction wire provided in one embodiment of this application;

[0043] Figure 2 This is a schematic diagram of the anchor in a first state according to an embodiment of this application;

[0044] Figure 3 This is a schematic diagram of the anchor in the second state according to an embodiment of this application;

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

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

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

[0048] Figure 4d This is a schematic diagram of the fourth recovery state of the anchor provided in one embodiment of this application;

[0049] Figure 5 This is a schematic diagram of the structure of one type of anchor provided in an embodiment of this application;

[0050] Figure 6 yes Figure 5 A cross-sectional view of the assembly of the anchor, pull line, and recovery line;

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

[0052] Figure 8 yes Figure 2 A magnified view of a section at point A in the middle;

[0053] Figure 9 yes Figure 8 A schematic diagram of the structure of the mid-range cap;

[0054] Figure 10 This is a schematic diagram of another anchor structure provided in one embodiment of this application;

[0055] Figure 11 This is a partial structural schematic diagram of an anchor provided in one embodiment of this application.

[0056] Explanation of reference numerals in the attached figures:

[0057] 10 - Anchor; 20 - Puncture needle; 30 - First tissue; 40 - Target tissue;

[0058] 100 - Pull line; 200 - Anchor; 300 - Drive tube; 400 - Retrieval line;

[0059] 110 - First limiting part; 210 - Limiting groove; 220 - Wire feeding cavity; 220a - Wire feeding groove; 230 - Limiting channel; 230a - Limiting hole; 240 - Clearance opening; 250 - End cap; 260 - Installation channel; 410 - Second limiting part;

[0060] 210a - bottom of the groove; 210b - side groove opening; P - flipping fulcrum; 210c - through hole; 250a - first through hole; 250b - second through hole. Detailed Implementation

[0061] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0062] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0063] In the description of this application, it should be understood that the terms "upper," "lower," "horizontal," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In this application, unless otherwise expressly specified and limited, the first feature being "upper" or "lower" than the second feature can mean 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.

[0064] In this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two entities connected are not linked by an intermediate structure, but are simply connected to form a whole. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0065] In this application, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0066] Endoscopic ultrasound (EUS) is a minimally invasive surgical procedure used to evaluate diseases of the digestive tract and lungs. In medical procedures involving the gastrointestinal tract, a fixator is inserted between two tissues to be drained, acting as a fistula to connect them. For example, in endoscopic ultrasound-guided gallbladder drainage, a fixator is inserted between the gallbladder and intestines, serving as a fistula to connect them.

[0067] Understandably, the process of installing the fixation device becomes more difficult because the gallbladder and intestines are in a free state.

[0068] To facilitate the installation of the mounting bracket, this application provides an endoscope ultrasonic anchoring system, including an endoscope and an anchoring device. Figure 1 This is an assembly diagram of the puncture needle and traction wire provided in one embodiment of this application; Figure 2 This is a schematic diagram of the anchor in a first state according to an embodiment of this application; Figure 3This is a schematic diagram of the anchor in the second state according to an embodiment of this application; Figure 4a This is a schematic diagram of the first recovery state of the anchor provided in an embodiment of this application; Figure 4b This is a schematic diagram of the second recovery state of the anchor provided in an embodiment of this application; Figure 4c This is a schematic diagram of the third recovery state of the anchor provided in an embodiment of this application; Figure 4d This is a schematic diagram of the fourth recovery state of the anchor provided in one embodiment of this application. (Refer to...) Figures 1 to 3 As shown, the anchoring device includes an anchor 10, which has a pull line 100 and an anchor 200. The anchor 200 is connected to the distal end of the pull line 100 (see reference). Figure 1 (As shown in 100b).

[0069] When surgery is required, an 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 an endoscope. For example, the endoscope cannula can be introduced into the intestine first, and then the anchor 10 can be inserted along the cannula. When the anchor 200 of the anchor 10 reaches the gallbladder through the intestine, the anchor 200 is stopped on the inner wall of the target tissue 40 by pulling the traction line 100 outward. The traction line 100 is then pulled further, causing the anchor 200 to move the gallbladder tightly against the side wall of the intestine, that is, the gallbladder is anchored. This makes the gallbladder stable on the outside of the intestine. On the one hand, it facilitates the installation of a fixation frame between the intestine and the gallbladder. On the other hand, it makes the fixation frame more stable between the intestine and the gallbladder.

[0070] Continue to refer to Figure 1 As shown, the anchoring device may also include a puncture needle 20. When the anchor 10 needs to be implanted, the puncture needle 20 can be implanted sequentially through the intestine and gallbladder under the guidance of an endoscope. When the distal end of the puncture needle 20, i.e. the needle tip, reaches the preset position in the gallbladder, the anchor 10 is moved along the needle path of the puncture needle 20 until the anchor 200 of the anchor 10 extends out of the distal end of the puncture needle 20, thus achieving the purpose of implanting the anchor 200 into the gallbladder.

[0071] To facilitate the implantation of the anchor 10, in related technologies, the traction wire 100 is made of a rigid material and has a rebound force with the anchor 200, meaning the anchor 200 has a force that rebounds towards the anchoring position, where the anchoring position is the position where the anchor 200 has a preset angle with the traction wire 100. During implantation, the anchor 200 moves along the needle track of the puncture needle 20 under the push of the rigid traction wire 100 until the anchor 200 extends beyond the needle tip of the puncture needle 20. Under the action of the rebound force, the anchor 200 forms a preset angle with the traction wire 100, thereby pulling the traction wire 100, which allows the anchor 200 to pull the gallbladder tightly against the intestine.

[0072] Reference Figures 4a to 4dAs shown, the anchor 10 in this embodiment of the application also includes a retrieval line 400, which is connected to the anchor 200. For example, one end of the retrieval line 400 (e.g., the fixed end, see reference) Figures 4a to 4d As shown in Figure 400b, the other end (e.g., the free end) of the retrieval line 400 is fixed to the anchor 200, and 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 puncture of the target tissue 40 and the first tissue 30 by the puncture needle 20.

[0073] After the surgery is completed, the grasping forceps can be inserted 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 can be removed from the body through the puncture channel and the forceps channel.

[0074] However, during the process of pulling the anchor 200 by the recovery line 400, the anchor 200 always has a rebound force to return to the anchored position. This results in a large frictional force between the anchor 200 and the inner wall of the puncture channel when the anchor 200 passes through the puncture channel, which causes damage to tissues such as the target tissue 40 and the first tissue 30.

[0075] This application provides an anchoring device and an anchor 10. By setting the traction wire 100 as a flexible element and placing the traction wire 100 inside the drive tube 300, when it is necessary to implant an anchor 200 at one end of the traction wire 100, a puncture needle 20 can be first implanted into the target tissue 40. Then, the drive tube 300 drives the traction wire 100 and the anchor 200 to move along the puncture needle 20 towards the target tissue 40 until the anchor 200 extends beyond the distal end of the puncture needle 20. The anchor 200 can then be flipped to form an angle with the traction wire 100, so that the anchor 200 can stop against the inner wall of the target tissue 40. Thus, by pulling the traction wire 100, the target tissue 40 can be tightly attached to other tissues under the action of the anchor 200. In addition, by setting the traction line 100 as a flexible element to avoid the rebound force between the flexible element and the anchor 200, the anchor 200 will not rebound outward when it retracts along the puncture channel during the process of the retrieval line 400 pulling the anchor 200 back, thereby reducing the friction between the anchor 200 and the inner wall of the puncture channel, and thus reducing or avoiding damage to the tissue (target tissue 40 and first tissue 30).

[0076] The structure of the anchoring device and anchor 10 provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0077] See Figures 1 to 4d As shown, this application embodiment provides an anchoring device, including an anchor 10 and a puncture needle 20. The distal end of the puncture needle 20 (refer to...) Figure 1As shown in Figure 20b, the puncture needle 20 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 inserted along the cannula of the endoscope into the first tissue 30, such as the intestine, and then the puncture needle 20 can be further inserted 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 predetermined position in 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 well visualized.

[0078] For example, the puncture needle 20 may include, but is not limited to, a 19G ultrasonic needle.

[0079] In this embodiment, the anchor 10 includes a tension line 100, which is a flexible element. For example, the tension line 100 can be a flexible line made of fiber material or other flexible material. This embodiment does not limit the material of the tension line 100, as long as the tension line 100 is a flexible element.

[0080] Anchor 10 includes anchor 200, which is connected to the distal end of pull line 100 and can be pulled by pull line 100.

[0081] In some examples, anchor 200 can be flipped under the pull of pull line 100, so that there is an anchoring angle between anchor 200 and pull line 100.

[0082] In other examples, the anchor 200 can also be flipped in other ways. For example, the anchor 200 can be flipped by a drive unit located at the distal end of the puncture needle 20 or the traction line 100. This application embodiment does not limit the flipping method of the anchor 200.

[0083] The anchoring angle is the angle between the anchor 200 and the traction line 100 when the target tissue 40, such as the gallbladder, is pulled to fit snugly against the intestine. For example, the anchoring angle can be 90° or 90°±10°, and can be adjusted according to the angle of the gallbladder's sidewall, ensuring that the anchor 200 fits snugly against the sidewall of the gallbladder. This embodiment does not limit the anchoring angle.

[0084] The anchor 10 of this embodiment includes a drive tube 300, which is at least partially sleeved on at least a portion of the pull wire 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 (see reference 1) under the drive of the drive tube 300. Figure 1As shown in Figure 20a, the needle enters the needle channel of the puncture needle 20 and moves along the needle channel of the puncture needle 20. When it extends to the distal end of the puncture needle 20, it can be flipped under the pull of the traction line 100 to form an angle with the traction line 100, such as an anchoring angle, so that the anchor 200 stops against the inner wall of the target tissue 40, thereby continuing to pull the traction line 100, so that the target tissue 40 is tightly attached to the outer wall of the first tissue 30 under the action of the anchor 200, thus completing the anchoring of the target tissue 40.

[0085] For ease of description, the needle path of the puncture needle 20 can extend in the x-direction, and the radial direction of the needle path can be in the y-direction. The radial dimension of the drive tube 300 can be less than or equal to the radial dimension of the puncture needle 20 along the y-direction, allowing the drive tube 300 to move smoothly along the needle path of the puncture needle 20.

[0086] Reference Figure 2 As shown, in some examples, the drive tube 300 can be entirely sleeved on the pull line 100, for example, the drive tube 300 can be entirely sleeved on the first part of the pull line 100. When the anchor 200 is located outside the drive tube 300, the first part can be the portion between the distal end 100b and the proximal end 100a of the pull line 100, such that a portion of the pull line 100 near the proximal end extends from the proximal side of the drive tube 300 and can be exposed on the proximal side of the drive tube 300, allowing the operator to pull the pull line 100 from the proximal end to cause the pull line 100 to rotate the anchor 200. Conversely, a portion of the pull line 100 near the distal end extends from the distal side of the drive tube 300 and is located outside the drive tube 300, and can be connected to the anchor 200 to achieve the rotation of the anchor 200.

[0087] In other examples, a portion of the drive tube 300 may be sleeved on the pull wire 100. For instance, a hole may be formed in the sidewall of the drive tube 300, through which the proximal or distal end of the pull wire 100 may extend out of the drive tube 300. Exemplarily, a hole may be formed in the sidewall of the drive tube 300 near its proximal end, through which the proximal end of the pull wire 100 may extend out of the drive tube 300.

[0088] When the anchor 200 is located inside the drive tube 300, the first portion can also be the portion between the distal end of the pull line 100 and a position a first length from the distal end. Exemplarily, the first length can be a suitable length such as 2 / 3 or 3 / 4 of the total length of the pull line 100, that is, the proximal end of the pull line 100 (refer to...) Figure 1 As shown in 100a, the position at the second length from the proximal end can be exposed on the proximal side of the drive tube 300 so that the operator can pull the pull line 100 from the proximal end of the pull line 100 to cause the pull line 100 to drive the anchor 200 to flip.

[0089] It is understood that the second length is equal to the difference between the total length of the traction wire 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 traction wire 100. This application embodiment does not limit the first length and the second length, as long as it ensures that the drive tube 300 can drive the traction wire 100 and the anchor 200 to be smoothly implanted into the target tissue along the puncture needle 20, and that the operator can pull the proximal end of the traction wire 100 to flip the anchor 200 and anchor the target tissue to the outer wall of the first tissue.

[0090] Reference Figures 1 to 4d As shown, the anchor 10 in this embodiment 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 through which the puncture needle 20 passes.

[0091] The retrieval line 400 is configured to pull the anchor 200, causing the anchor 200 to flip and detach from the target tissue 40 along the puncture channel. For example, after the surgery, a grasping forceps can be inserted into the first tissue 30 through the forceps channel of the endoscope, the free end of the retrieval line 400 can be grasped under the endoscope, and then withdrawn, so that the anchor 200 is removed from the body through the puncture channel and forceps channel in sequence.

[0092] It is understandable that the recycling line 400 is a flexible component, and the materials of the recycling line 400 and the pull line 100 can be the same or different, as long as both the recycling line 400 and the pull line 100 are flexible components.

[0093] Reference Figures 1 to 4d As shown, the following example, using the first tissue 30 as the intestine and the target tissue 40 as the gallbladder, illustrates the implantation and retrieval process of the anchor 10:

[0094] After the puncture needle 20 is implanted, the traction wire 100 and the anchor 200 at the distal end of the traction wire 100 can be pushed from the proximal end of the puncture needle 20 into the needle channel of the puncture needle 20 through the drive tube 300.

[0095] Continue pushing the drive tube 300 to advance the anchor 200 toward the distal end of the puncture needle 20 until the anchor 200 extends beyond the distal end of the puncture needle 20 and extends to the distal side of the drive tube 300. Then pull the traction line 100 to flip the anchor 200 to the anchoring angle.

[0096] It should be noted that in this step, "anchor 200 extending beyond the distal end of puncture needle 20" means that the entire part of anchor 200 extends beyond the distal end of puncture needle 20, or it can mean that part of anchor 200 extends beyond the distal end of puncture needle 20. As long as the pulling line 100 is pulled, the proximal end of anchor 200 can move to the outside of the distal end of puncture needle 20 during the flipping process.

[0097] The puncture needle 20 is retracted into the endoscope's channel, and the drive tube 300 is also retracted into the puncture needle 20. Then, the puncture needle 20 is withdrawn along with the drive tube 300, leaving the traction wire 100 in the channel. Additionally, a portion of the retrieval wire remains in the first tissue 30, and this portion is visible under the endoscope; the other portion, the part connected to the anchor 200, is located within the target tissue 40.

[0098] Pulling the traction line 100, for example, can be done from the proximal end of the traction line 100, so that the anchor 200 first adheres to the inner wall of the gallbladder, and then the gallbladder is pulled to the outer wall of the intestine, thus achieving the anchoring of the gallbladder.

[0099] Reference Figures 4a to 4d As shown, after the surgery is completed, the grasping forceps can be inserted into the first tissue 30 through the forceps channel of the endoscope. Under the endoscope, the free end of the retrieval line 400 is grasped 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.

[0100] In this embodiment, because the pull line 100 is a flexible component, there is no rebound force between the anchor 200 and the pull line 100, that is, the anchor 200 does not have a rebound force to return to the anchored position. Compared with the example above where the pull line 100 is a rigid material, this makes it easier for one end of the anchor 200 to flip to the opening of one end of the puncture channel under the pull of the recovery line 400 and continue to enter the puncture channel. This reduces or avoids the one end of the anchor 200 hitting the inner wall of the target tissue 40 when it reaches the opening of one end of the puncture channel, thus damaging the target tissue 40.

[0101] In addition, as the anchor 200 moves along the puncture channel, since the anchor 200 does not have a rebound force to return to the anchored position, the friction between the anchor 200 and the inner wall of the puncture channel is reduced, thereby reducing the damage to the inner wall of the puncture channel, i.e., the target tissue 40 and the first tissue 30.

[0102] It should be noted that during the retraction of anchor 200 along the puncture channel, the length direction of anchor 200 can be parallel to the extension direction of the puncture channel, or it can be at an angle. For example, the angle can be less than or equal to 30°, such as 10°, 15°, 20° or 30°.

[0103] The direction of the puncture channel can be referenced. Figures 4a to 4d As shown in direction a, the length direction of anchor 200 is the direction of extension of the line connecting the near end and the far end of anchor 200.

[0104] In some examples, the drive tube 300 may be sleeved on the pull line 100, and the anchor 200 may be located on the distal side of the drive tube 300. That is, the drive tube 300 is only sleeved on the pull line 100, and the anchor 200 is exposed outside the drive tube 300 and located on the distal side of the drive tube 300.

[0105] When the anchor 200 is located within the puncture needle 20, the proximal end of the anchor 200 (refer to...) Figure 2 The anchor 200 (as shown in 200a) abuts against the distal end (300b) of the drive 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 be flipped under the abutment of the drive tube 300 and the pull of the traction line 100.

[0106] For example, during the implantation of anchor 10, drive tube 300 can first push the distal end of anchor 200 (see reference). Figure 2 As shown in Figure 200b, the anchor 20 is gradually inserted into the needle channel of the puncture needle 20 from the proximal end of the puncture needle 20. Then, the distal end of the drive tube 300 pushes against the proximal end of the anchor 200, causing the anchor 200 to advance towards the distal end of the puncture needle 20. When the anchor 200 extends beyond 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 drive tube 300 can continue to push against the anchor 200 and simultaneously pull the traction line 100, so that the anchor 200 achieves stable flipping under the assistance of the push of the drive tube 300 and the pull of the traction line 100.

[0107] Of course, in some examples, when the anchor 200 extends beyond the distal end of the puncture needle 20, the drive tube 300 does not need to press against the anchor 200, and the anchor 200 can be flipped under the pull of the traction line 100.

[0108] When the anchor 200 is located inside the puncture needle 20, the length direction of the anchor 200 can be parallel to the extension direction of the puncture needle 20 or at an angle to the extension direction of the puncture needle 20. However, because the traction wire 100 is a flexible component, there is no elastic force between the traction wire 100 and the anchor 200. This prevents the anchor 200 from excessively contacting the side wall of the puncture needle 20 when it moves inside the puncture needle 20. Instead, it moves only along the side wall of the puncture needle 20, reducing the friction between the anchor 200 and the puncture needle 20. This ensures that the anchor 200 moves stably along the puncture needle 20 under the drive of the drive tube 300, thereby improving the implantation stability and efficiency of the anchor 200.

[0109] In other examples, the drive tube 300 may be fitted around the periphery of the traction wire 100 and the anchor 200 (not shown in the figure), that is, both the anchor 200 and the traction wire 100 are located inside the drive tube 300. During the implantation of the anchor 10, the distal end of the drive tube 300 may gradually enter the needle tract of the puncture needle 20 from the proximal end of the puncture needle 20, so that the anchor 200 and part of the traction wire 100 enter the needle tract of the puncture needle 20, thereby pushing the drive tube 300, so that the drive 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 under the drive of the drive tube 300. For example, the distal end of the drive tube 300 is flush with the distal end of the anchor 200. When the distal end of the anchor 200 just reaches the distal end of the puncture needle 20, it indicates that the distal end of the anchor 200 has reached the distal end of the puncture needle 20. Then the drive tube 300 can be retracted, so that the anchor 200 is exposed by the drive tube 300, and the proximal end of the anchor 200 can abut against the distal end of the drive tube 300. Then the drive tube 300 is pushed towards the distal end of the puncture needle 20, so that the anchor 200 is exposed by the drive tube 300 until the proximal end of the anchor 200 just reaches the distal end of the puncture needle 20. Then the drive tube 300 can continue to abut against the anchor 200, and at the same time pull the traction line 100, so that the anchor 200 can achieve stable flipping with the abutment assistance of the drive tube 300 and the pull of the traction line 100.

[0110] Of course, in some examples, a portion of the anchor 200 can be placed inside the drive tube 300, while the other portion is exposed outside the drive tube 300. When the distal end of the anchor 200 reaches the distal end of the puncture needle 20, the drive tube 300 can be retracted, so that the proximal end of the anchor 200 abuts against the distal end of the drive tube 300. The drive tube 300 is then pushed further 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 drive tube 300. When the proximal end of the anchor 200 just reaches the distal end of the puncture needle 20, the drive tube 300 can continue to abut against the anchor 200, so that the anchor 200 can achieve stable flipping with the abutment assistance of the drive tube 300 and the pull of the traction line 100.

[0111] Understandably, in the above example, since the traction wire 100 is a flexible component, there is no rebound force between the traction wire 100 and the anchor 200. This prevents the anchor 200 from tightly contacting the side wall of the drive tube 300, allowing the anchor 200 and the drive tube 300 to move relative to each other when the drive tube 300 is retracted. It is sufficient to ensure that the anchor 200 and the traction wire 100 can be pushed together to the distal end of the puncture needle 20 during the advancement of the drive tube 300.

[0112] The anchoring device of this application embodiment can also be used in ESD surgery. For example, during the tissue cutting process in ESD surgery, the anchor 200 in the anchoring device can pull the mucosa to prevent the tissue from obscuring the electrosurgical unit and improve the surgical field of vision.

[0113] Figure 5 This is a structural schematic diagram of one type of anchor provided in an embodiment of this application. Figure 6 yes Figure 5 A cross-sectional view of the assembly of the anchor, pull line, and recovery line. Figure 7 yes Figure 6 Sectional view of the middle anchor. Figure 8 yes Figure 2 A magnified view of a portion at point A. (Refer to...) Figures 5 to 8 As shown, in some examples, a limiting groove 210 and a side groove 210b communicating with the limiting groove 210 can be formed on the anchor 200. Both the limiting groove 210 and the side groove 210b extend along the length direction of the anchor 200, and one end of both the limiting groove 210 and the side groove 210b penetrates through the proximal end of the anchor 200. The length direction of the anchor 200 can be referenced... Figures 5 to 8 As shown in the direction of b.

[0114] It is understandable that the side groove 210b can be an opening of the limiting groove 210 on the side wall of the anchor 200. For ease of description, the two opposite ends of the limiting groove 210 along the length direction can be referred to as the first end and the second end, respectively. The end that passes through the near end of the anchor 200 is called the first end, and the end facing away from the near end of the anchor 200 is called the second end.

[0115] If the first end of the limiting groove 210 extends to the near end of the anchor 200, it indicates that the first end of the limiting groove 210 has an end slot, which is connected to the side slot 210b and has a different orientation.

[0116] When the proximal end of the anchor 200 is located at the puncture needle 20, at least a portion of the pull line 100 is located within the limiting groove 210, extends out of the anchor 200 from the end opening of the limiting groove 210, and extends into the drive tube 300. During the process of the pull line 100 pulling the anchor 200 to flip, a portion of the pull line 100 detaches from the anchor 200 from the side opening 210b.

[0117] For example, when fixing, the pull line 100 can be fixed at any position within the limiting groove 210, or at a position in the anchor 200 other than the limiting groove 210, as long as part of the pull line 100 is contained within the limiting groove 210.

[0118] In this embodiment, a limiting groove 210 is provided on the anchor 200 to restrict the pull line 100 in the radial direction of the anchor 200, so that when the anchor 200 is inside the puncture needle 20, the pull line 100 is located inside the anchor 200, which plays a good role in storing the pull line 100 and avoids the pull line 100 from rubbing against the puncture needle 20 and accumulating.

[0119] In other examples, a mounting hole perpendicular to the length direction can be formed within the anchor 200, such that the distal end of the pull wire 100 is fixed within the anchor 200 and extends through the mounting hole to the outside of the anchor 200. When the proximal end of the anchor 200 is located at the puncture needle 20, the pull wire 100 extends along the outer wall of the anchor 200 into the drive tube 300.

[0120] Reference Figures 6 to 8 As shown, in order to achieve better flipping of the anchor 200, in some examples, the limiting groove 210 has a clearance opening 240 at one end (i.e., the first end) near the anchor 200. One end of the clearance opening 240 extends to the side groove 210b, and the other end extends to the side of the limiting groove 210 opposite to the side groove 210b along its axis l. 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.

[0121] For ease of description, the portion of the limiting groove 210 with the clearance opening 240 in the length direction can be referred to as the first part, and the other portions of the limiting groove 210 in the length direction can be referred to as the second part. The angle at which the groove wall of the second part of the limiting groove 210 extends circumferentially around the axis l is called the second angle, and the angle at which the groove wall of the first part extends circumferentially around the axis l is called the first angle.

[0122] The first angle and the second angle are both less than 360°, so that a side groove 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 less than the second angle, so that the first end of the limiting groove 210 forms a clearance opening 240.

[0123] In some examples, the first angle can decrease in the direction from the second part of the limiting groove 210 to the proximal end of the anchor 200, and the decreasing slope is always equal, so that the end face of the clearance opening 240 communicating with the side wall groove forms an inclined plane. Of course, in other examples, the first angle decreases at different slopes in the direction from the second part of the limiting groove 210 to the proximal end of the anchor 200, for example, the decreasing slope gradually increases, so that the end face of the clearance opening 240 communicating with the side wall groove forms an arc-shaped surface.

[0124] Of course, in some examples, the first angle remains unchanged in the direction from the second part of the limiting groove 210 to the near end of the anchor 200. In this case, the end face of the clearance opening 240 communicating with the side wall groove is a vertical surface perpendicular to the side groove, and the clearance opening 240 has a horizontal surface perpendicular to the vertical surface, that is, the entire end face of the clearance opening 240 is a right-angled surface. The embodiments of this application do not limit the shape of the end face of the clearance opening 240.

[0125] Furthermore, the other end of the clearance opening 240 extends to the side of the limiting groove 210 opposite to the side opening 210b along the axis l. That is, the first angle at the end of the first part of the limiting groove 210 near the anchor 200 is less than 180°. Specifically, the end wall of the first part of the limiting groove 210 near the anchor 200 extends circumferentially around the axis l to a plane lower than the plane containing the axis l. In other words, the other end of the clearance opening 240 and the axis l of the limiting groove 210 have a first distance in the radial direction of the anchor 200 (refer to...). Figure 8 (As shown in L). It can be understood that the plane containing axis l is set relative to the bottom of the tank 210a.

[0126] By forming a clearance opening 240 at the first end of the limiting groove 210, and extending one end of the clearance opening 240 to the side opening 210b and the other end to the side of the axis l of the limiting groove 210 facing away from the side opening 210b, the proximal end of the anchor 200, except for the clearance opening 240, abuts against the distal end of the drive tube 300, and the end of the clearance opening 240 away from the side opening 210b serves as the turning fulcrum P of the anchor 200.

[0127] When the proximal end of the anchor 200 reaches or is about to reach the distal end of the puncture needle 20, the pulling line 100 is pulled, so that the flipping fulcrum P will be resisted by the distal end of the drive tube 300. Since the flipping fulcrum P and the axis l of the limiting groove 210 have a first distance, after the anchor 200 is pulled by the pulling line 100, the flipping fulcrum P is resisted by the distal end of the drive tube 300, thereby forming a flipping torque, so that the anchor 200 can achieve better flipping.

[0128] In some examples, there is a gap between the other end of the clearance 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 clearance opening 240 does not extend to the bottom 210a of the limiting groove 210, so that the near end of the anchor 200 leaves a portion of the end face perpendicular to the axis l, so that the far end of the drive tube 300 can stably abut against the end slot side of the limiting groove 210 without entering the limiting groove 210 or swaying at the end slot side of the limiting groove 210. This allows the drive tube 300 to push the anchor 200 to move stably along the puncture needle 20, and allows the drive tube 300 to stably abut against the flipping fulcrum P, and pulls the anchor 200 to flip stably under the pull of the traction line 100.

[0129] The bottom 210a of the limiting groove 210 is positioned opposite to the side opening 210b.

[0130] For example, the distance between the other end of the clearance opening 240 and the bottom 210a of the limiting groove 210 can be less than or equal to 5mm. For example, the distance can be a suitable value such as 1mm, 3mm or 5mm. This application embodiment does not limit the distance.

[0131] In some examples, when the proximal end of the anchor 200 is located at the puncture needle 20, the traction line 100 can extend along the axis l of the limiting groove 210, so that the traction line 100 pulls the anchor 200 along the axis l of the limiting groove 210, causing the anchor 200 to flip.

[0132] In some other examples, when the proximal end of the anchor 200 is located at the puncture needle 20, the traction line 100 can be located between the axis l of the limiting groove 210 and the side opening 210b. For ease of description, the side of the limiting groove 210 facing the side opening 210b along the axis l can be designated as the first side, and the side of the limiting groove 210 facing the flipping fulcrum P (or the bottom of the groove 210a) along the axis l can be designated as the second side. The traction line 100 is positioned on the first side of the limiting groove 210, offset from the second side, i.e., offset from the flipping fulcrum P side. In this way, the traction line 100 pulls the anchor 200 along the side away from the flipping fulcrum P, which can increase the flipping torque of the anchor 200, so that the anchor 200 can achieve better flipping under the pull of the traction line 100 and the abutment of the drive tube 300.

[0133] In some examples, the distal end of the pull wire 100 can be fixed at any position in the limiting groove 210, for example, it can be fixed inside the second end of a single limiting groove 210.

[0134] Reference Figure 6 As shown, in some other examples, a wire-laying cavity 220 may be formed on the anchor 200;

[0135] The wire release cavity 220 and the groove cavity of the limiting groove 210 are connected through the through hole 210c. The distal end of the pull line 100 is restricted in the wire release cavity 220, and the pull line 100 extends from the through hole 210c into the limiting groove 210.

[0136] For example, the wire release cavity 220 and the limiting groove 210 can be spaced apart along the length direction of the anchor 200, so that the portion of the pull line 100 located inside the anchor 200 extends along the length direction of the anchor 200.

[0137] The through hole 210c is located within the anchor 200 and extends along the length of the anchor 200. The through hole 210c better restricts the radial position of the pull wire 100 on the anchor 200 and simplifies the mating structure between the anchor 200 and the pull wire 100. For example, the through hole 210c can be positioned on the axis l of the limiting groove 210, i.e., the axis l of the through hole 210c coincides with the axis l of the limiting groove 210. Thus, when the distal end of the pull wire 100 is fixed within the 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 positioned on the extension area of ​​the first side of the limiting groove 210, the pull wire 100 is confined to the extension area of ​​the first side of the limiting groove 210.

[0138] In some examples, the distal end of the pull wire 100 may be fixed to the wire release cavity 220 by means of bonding or welding.

[0139] In other examples, the distal end of the pull wire 100 is provided with a first limiting portion 110, which is engaged within the wire release cavity 220 to restrict the distal end of the pull wire 100 within the wire release cavity 220.

[0140] Understandably, the width of the first limiting part 110 is greater than the opening width of the wire feeding cavity 220, causing the first limiting part 110 to be engaged within the wire feeding cavity 220, thus confining the distal end of the pull wire 100 within the wire feeding cavity 220 and preventing it from slipping out of the slot in the wire feeding cavity 220. Furthermore, the outer contour of the first limiting part 110 is larger than the first opening of the through hole 210c, preventing the first limiting part 110 from entering the limiting groove 210 through the through hole 210c, ensuring that the first limiting part 110, i.e., the distal end of the pull wire 100, is confined within the wire feeding cavity 220.

[0141] In some examples, the first limiting part 110 can move within the wire feeding cavity 220 or be fixed within the wire feeding cavity 220; the embodiments of this application do not limit this.

[0142] For example, the first limiting portion 110 may be integral with the distal end of the pull line 100. For instance, the first limiting portion 110 may be a knot at the distal end of the pull line 100. In some examples, the first limiting portion 110 may also be a block-shaped or spherical limiting structure fixed to the distal end of the pull line 100.

[0143] In some examples, when the anchor 200 is flipped to the anchoring position, the pull line 100 is disengaged from the anchor 200 at the center of the anchor 200 along its length.

[0144] It is understandable that when anchor 200 flips to the anchoring position, part of the pull line 100 is inside anchor 200, and another part is detached from anchor 200, that is, the other part is outside anchor 200. Therefore, the position where pull line 100 detaches from anchor 200 (refer to...) Figure 3 (M) refers to the position on the anchor 200 corresponding to the turning point of the part of the pull line 100 inside the anchor 200 and the part outside the anchor 200.

[0145] By setting the position where the pull line 100 leaves the anchor 200 at the center of the anchor 200 along its length, the anchor 200 will not deviate from its anchoring position during the pulling of the pull line 100, that is, the angle between the anchor 200 and the pull line 100 will not deviate from the anchoring angle. This ensures that the anchor 200 can stably adhere to the inner wall of the target tissue 40 during the pulling of the pull line 100 without causing damage to the target tissue 40.

[0146] It is understandable that when the anchor 200 is flipped to the anchoring position, the position where the pull line 100 leaves 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 leaves the anchor 200 is the center of the anchor 200.

[0147] In some examples, the distal end of the pull line 100 can be directly fixed to the center of the anchor 200, for example, it can be fixed to the second end of the limiting groove 210.

[0148] In other examples, the distal end of the pull line 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 pull line 100 may be confined within the aforementioned release cavity 220. Since the release cavity 220 is located on the side of the limiting groove 210 facing the distal end of the anchor 200, for example, if the 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 pull line 100 may deviate 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 pull line 100 may extend towards the proximal end of the anchor 200.

[0149] In some examples, the fixed end of the recovery line 400 is fixed to the center of the anchor 200 along its length, or the fixed end of the recovery line 400 is located between the center of the anchor 200 and the distal end of the anchor 200 (see reference). Figure 6 (As shown).

[0150] 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. The retrieval line 400 is configured to cause the distal end of the anchor 200 to flip toward the puncture channel.

[0151] In the example above, the pull line 100 extends to the proximal end of the anchor 200, and when the pull line 100 and the anchor 200 are located at the puncture needle 20, the pull line 100 extends out of the anchor 200 from the proximal end of the anchor 200. When the anchor 200 extends out of the puncture needle 20 and flips to the anchoring position, the pull line 100 disengages from the center of the anchor 200.

[0152] Therefore, by extending the retrieval line 400 to the distal end of the anchor 200 and extending it beyond the distal end of the anchor 200, the retrieval line 400 can cause the distal end of the anchor 200 to flip towards the puncture channel without interfering with the pull line 100 located on the other side of the anchor 200. This avoids the situation where the pull line 100 accumulates and affects the distal end of the anchor 200 entering the puncture channel, thereby improving the retrieval efficiency of the anchor 200.

[0153] In some examples, the fixed end of the recovery line 400 can be directly fixed to the far end of the anchor 200 or to the side wall near the far end.

[0154] Reference Figure 6 As shown, in some other examples, a limiting channel 230 can be formed on the anchor 200, the limiting channel 230 communicating with the pay-off cavity 220, and one end of the limiting channel 230 penetrating the distal end of the anchor 200. It can be understood that the limiting channel 230 is located on the side of the pay-off cavity 220 opposite to the limiting groove 210.

[0155] The fixed end of the retrieval line 400 is fixed inside the release cavity 220, and the retrieval line 400 extends out of the far end of the anchor 200 through the limiting channel 230.

[0156] The limiting channel 230 is provided along the length of the anchor 200. The limiting channel 230 better restricts the radial position of the retrieval line 400 on the anchor 200 and simplifies the mating structure between the anchor 200 and the retrieval line 400. For example, the limiting channel 230 can be positioned on the axis l of the anchor 200. Thus, when the fixed end of the retrieval line 400 is fixed within the release cavity 220, and the retrieval line 400 extends from the limiting channel 230 beyond the distal end of the anchor 200, the retrieval line 400 can extend along the axis l of the anchor 200, facilitating the flipping of the anchor 200.

[0157] In some examples, the fixed end of the recovery line 400 can be fixed to the wire dispensing cavity 220 by means of adhesive bonding or welding.

[0158] In other examples, the fixed end of the take-up line 400 is provided with a second limiting part 410, which is engaged in the pay-off cavity 220 so that the fixed end of the take-up line 400 is restricted within the pay-off cavity 220.

[0159] It is understandable that the width of the second limiting part 410 is greater than the opening width of the wire feeding cavity 220, so that the second limiting part 410 is stuck in the wire feeding cavity 220, and the fixed end of the retrieved wire 400 is restricted in the wire feeding cavity 220, and will not come out from the slot of the wire feeding cavity 220.

[0160] In addition, the outer contour size of the second limiting part 410 is larger than the size of the first through hole 250a, so that the second limiting part 410 will not enter the limiting channel 230 from the first through hole 250a, ensuring that the second limiting part 410 is restricted within the wire feeding cavity 220, that is, the fixed end of the retrieved wire 400 is restricted within the wire feeding cavity 220.

[0161] In some examples, the second limiting part 410 can move within the wire feeding cavity 220 or be fixed within the wire feeding cavity 220; this application embodiment does not limit this.

[0162] For example, the second limiting part 410 may be integral with the fixed end of the take-up line 400. For instance, the second limiting part 410 may be a tie to the fixed end of the take-up line 400. In some examples, the second limiting part 410 may also be a block-shaped or spherical limiting structure fixed to the fixed end of the take-up line 400.

[0163] In some examples, the fixed end of the take-up line 400 is connected to the second limiting part 410 at the distal end of the pull line 100, and the second limiting part 410 is engaged in the pay-off cavity 220 so that the fixed end of the take-up line 400 is restricted in the pay-off cavity 220.

[0164] Understandably, in this example, the retrieval line 400 and the pull line 100 share a first limiting part 110 to simplify the structure of the anchor 10. In this example, the outer contour dimension of the first limiting part 110 needs to be larger than the size of the first through hole 250a, so that the first limiting part 110 will not enter the limiting channel 230 from the first through hole 250a, thereby confining the fixed ends of both the pull line 100 and the retrieval line 400 within the release cavity 220.

[0165] For example, the first limiting part 110, the pulling line 100 and the retrieval line 400 can be integrally formed as a single piece to simplify the structure of the entire anchor 10 and improve the assembly efficiency of the anchor 10.

[0166] Figure 9 yes Figure 8 A structural diagram of the mid-cap. (Refer to...) Figures 5 to 9 As shown, in some examples, an installation channel 260 is formed on the anchor 200, one end of which communicates with a through hole 210c, and the other end of which extends to the distal end of the anchor 200. For example, the installation 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 installation channel 260 and the limiting groove 210, and connects the installation channel 260 and the limiting groove 210.

[0167] In some examples, the distal end of the anchor 200 has an end cap 250, which is embedded in the mounting channel 260 from the distal end of the anchor 200. One end of the end cap 250 is spaced apart from the through hole 210c, and a wire-laying cavity 220 is formed between the end cap 250 and the through hole 210c. In addition, the inner cavity of the end cap 250 forms the aforementioned limiting channel 230.

[0168] For example, the through hole 210c has a first opening and a second opening that are arranged opposite to each other along the length of the anchor 200. The first opening faces the limiting groove 210 and is connected to the limiting groove 210. 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.

[0169] For example, the end cap 250 has a hollow internal structure, and both ends of the end cap 250 have through holes. For ease of description, the through hole at the end of the end cap 250 facing the wire feeding cavity 220 is referred to as the first through hole 250a, and the through hole at the end of the end cap 250 facing away from the wire feeding cavity 220 is referred to as 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 wire feeding 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 retrieved line 400 extends out of the outside of the anchor 200 sequentially through the first through hole 250a, the inner cavity, and the second through hole 250b.

[0170] It is understandable that the inner cavity can serve as a limiting channel 230, with the first through hole 250a being the opening at one end of the limiting channel 230 and the second through hole 250b being the opening at the other end of the limiting channel 230.

[0171] By providing an installation channel 260 on the anchor 200, and extending the installation channel 260 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 line-laying cavity 220 and a limiting channel 230, the structural configuration of the anchor 200 is simplified, making it easier for the distal end of the pull line 100 and the fixed end of the take-up line 400 to be assembled in the line-laying cavity 220.

[0172] Figure 10 This is a schematic diagram of another anchor structure provided in one embodiment of this application. (Refer to...) Figure 10 As shown, in some other examples, the sidewall of the anchor 200 is recessed inward with a line-laying groove 220a, and the groove cavity of the line-laying groove 220a is configured as a line-laying cavity 220.

[0173] In this example, the limiting channel 230 is a limiting hole 230a opened on the anchor 200. The two ends of the limiting hole 230a pass through the wire feeding groove 220a and the far end of the anchor 200, respectively, so that the free end of the retrieved line 400 extends from the wire feeding groove 220a through the limiting hole 230a to the outside of the anchor 200.

[0174] Figure 11 This is a partial structural schematic diagram of an anchor provided in one embodiment of this application. In some examples, at least a portion of the retrieval line 400 is located within the drive tube 300 to enter the target tissue 40 under the actuation of the drive tube 300.

[0175] For example, the fixed end of the retrieval line 400 is located within the release cavity 220 of the anchor 200, and the retrieval line 400 extends beyond the distal end of the anchor 200 along the limiting channel 230 and folds back into the drive tube 300. It is understood that by embedding at least a portion of the retrieval line 400 within the drive tube 300, the retrieval line 400 can be taut within the anchor 10. This allows the retrieval line 400 to advance alongside the drive tube 300 as the drive tube 300 moves along the puncture needle 20. This prevents the retrieval line 400 from accumulating at the distal end of the drive tube 300 and affecting the forward movement and overturning of the anchor 200 if the drive tube 300 inadvertently retracts.

[0176] In addition, by placing the free end of the retrieval line 400 inside the drive tube 300, the retrieval line 400 is prevented from rubbing against the inner wall of the needle channel of the puncture needle 20 when the drive tube 300 is accidentally retracted, which would cause the retrieval line 400 to accumulate at the distal end of the drive tube 300 and affect the forward movement and overturning of the anchor 200.

[0177] The above detailed embodiments further illustrate the purpose, technical solution, and beneficial effects of the embodiments of this application. It should be understood that the above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solutions of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. An anchor, characterized in that, include: The tension wire is a flexible component; An anchor is attached to the far end of the pull line and can be pulled by the pull line; A drive tube, at least partially sleeved on at least a portion of the traction wire, is configured to drive the anchor along the puncture needle to allow the anchor to enter the target tissue; A retrieval line, connected to the anchor, is configured to pull the anchor so that the anchor detaches from the target tissue along a puncture channel in the target tissue; wherein the puncture channel is a channel in the target tissue formed by the puncture needle.

2. The anchorage according to claim 1, characterized in that, The drive tube is sleeved on the tension line, and the anchor is located outside the distal end of the drive tube; When the anchor is inside 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 flipped under the pressure of the drive tube and the pull of the traction line.

3. The anchorage according to claim 2, characterized in that, The anchor has a limiting groove and a side groove communicating with the limiting groove. Both the limiting groove and the side groove extend along the length direction of the anchor, and one end of the limiting groove and the side groove penetrates 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 traction line is located within the limiting groove, and during the process of the traction line pulling the anchor to flip, a portion of the traction line detaches from the anchor from the side groove.

4. The anchorage according to claim 3, characterized in that, The limiting groove has a clearance opening at one end near the anchor. One end of the clearance opening extends to the side groove opening, and the other end of the clearance opening extends to the side of the limiting groove opposite to the side groove opening.

5. The anchor according to claim 4, characterized in that, There is a gap between the other end of the clearance opening and the bottom of the limiting groove; The bottom of the limiting groove is positioned opposite to the side groove opening.

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

7. The anchorage according to claim 1, characterized in that, When the anchor flips to the anchoring position, the position where the pull line leaves the anchor is located at the center of the anchor along its length.

8. The anchorage according to claim 7, characterized in that, One end of the recovery line is located at the center of the anchor along its length; or... One end of the recovery line is located between the center of the anchor along its length and the far end of the anchor; Wherein, the distal end of the pull line is located between the center position 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.

9. The anchor according to any one of claims 3-6, characterized in that, A line-laying cavity is formed on the anchor; The wire feeding cavity is connected to the cavity of the limiting groove through a through hole. The distal end of the pull wire is confined within the wire feeding cavity, and the pull wire extends from the through hole into the limiting groove.

10. The anchorage according to claim 9, characterized in that, The distal end of the pull wire has a first limiting portion, which is embedded in the wire release cavity to restrict the distal end of the pull wire within the wire release cavity.

11. The anchorage according to claim 10, characterized in that, The anchor also forms a limiting channel, which is connected to the line-laying cavity of the anchor, and one end of the limiting channel extends through the distal end of the anchor. One end of the retrieval line is fixed inside the release cavity, and the retrieval line extends from the far end of the anchor through the limiting channel.

12. The anchorage according to claim 11, characterized in that, One end of the take-up line has a second limiting part, which is engaged in the pay-off cavity to restrict one end of the take-up line within the pay-off cavity.

13. The anchorage according to claim 11, characterized in that, One end of the retrieval line is connected to the first limiting part at the distal end of the pull line, and the first limiting part is embedded in the wire release cavity so that one end of the retrieval line is restricted within the wire release cavity.

14. The anchorage according to claim 11, characterized in that, The anchor has an inwardly recessed line-laying groove on its sidewall, and the groove cavity of the line-laying groove is configured as the line-laying cavity. The limiting channel is a limiting hole opened on the anchor, and the two ends of the limiting hole pass through the wire feeding groove and the far end of the anchor, respectively.

15. The anchorage according to claim 11, characterized in that, An installation channel is formed inside the anchor, one end of which communicates with the through hole, and the other end of which extends to the far end of the anchor. The anchor has an end cap at its distal end, which is embedded in the mounting channel from the distal end of the anchor, with one end spaced apart from the through hole. The end cap forms the wire-feeding cavity between one end 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-feeding cavity and the limiting channel, and the other end of the end cap has a second through hole to connect the limiting channel and the outside of the anchor.

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

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

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