Elongated anchor and system for deploying elongated anchor

Abstract

An elongate anchor for securing a suture to tissue and a system for deploying the elongate anchor are provided. The slender anchor comprises a first opening, a second opening, a wire passing channel extending from the first opening to the second opening, and a first wire embedding space extending in the axial direction. The first wire embedding space is communicated with the first opening. The far end of the suture enters the suture passing channel through the first opening and penetrates out of the second opening to be attached to the long and thin anchor; and the extending end of the suture is selectively switched between being accommodated in the first suture embedding space and being separated from the first suture embedding space. According to the slender anchor and the system provided by the invention, the damage to tissues is reduced, and the effectiveness of repairing the tissues is further guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an elongated anchor for fixing a suture to a tissue and a system for deploying the elongated anchor. Background Art

[0002] Heart valves (such as the mitral valve and tricuspid valve) are one-way valves located between the atria and ventricles. Healthy heart valves can control the flow of blood from the atria to the ventricles, while preventing blood from flowing from the ventricles to the atria. However, when the leaflets, chordae tendineae, or valve rings of the heart valves become diseased and cause blood to flow back to the atria, it is very easy to cause mitral regurgitation or tricuspid regurgitation. Clinically, it is increasingly common to repair the diseased position of the heart valves through interventional minimally invasive surgery.

[0003] Taking artificial chord implantation as an example, for reflux caused by lesions or ruptures of natural chords, one end of the suture can be fixed to the valve leaflet and the other end can be fixed to the papillary muscle or ventricular tissue to form an artificial chord, thereby replacing the function of the diseased or broken natural chord. Generally, the suture can be attached to a slender anchor, and after the puncture needle in the delivery system is used to puncture the valve leaflet, the slender anchor contained therein is released to abut against the valve leaflet to achieve a firm fixation of the suture at the end of the valve leaflet. However, in the prior art, the overall radial dimension of the slender anchor with sutures attached is generally large, which leads to the outer diameter of the puncture needle to be large, so it is very easy to cause the risk of the valve leaflet being torn when the puncture needle punctures the valve leaflet, which not only causes great trauma to the valve leaflet, but also cannot guarantee the effectiveness of the slender anchor in repairing the valve leaflet. Especially for transcatheter surgery, due to the need to pass through a curved and limited-size blood vessel, the corresponding puncture needle size needs to face greater challenges. Summary of the invention

[0004] An object of the present invention is to provide an elongated anchor for fixing a suture to a tissue and a system for deploying the elongated anchor, which not only reduces damage to the tissue but also further ensures the effectiveness of repairing the tissue.

[0005] In order to achieve the above objectives, in a first aspect, the present invention provides an elongated anchor for fixing a suture to a tissue, the elongated anchor comprising:

[0006] First opening;

[0007] The second opening;

[0008] A wire passage extending from the first opening to the second opening; and

[0009] A first wire-burying space extending in the axial direction, wherein the first wire-burying space is communicated with the first opening;

[0010] The distal end of the suture enters the wire passage through the first opening and passes through the second opening to be attached to the elongated anchor; the extended end of the suture selectively switches between being accommodated in the first wire embedding space and being separated from the first wire embedding space.

[0011] In a second aspect, the present invention also provides a system for deploying an elongated anchor, the system comprising:

[0012] a needle having a sharp distal end for piercing tissue;

[0013] Sutures; and

[0014] An elongated anchor as described above;

[0015] The system has an initial state and a released state. In the initial state, the slender anchor is axially loaded on the distal end of the needle, and the extended end of the suture is accommodated in the first wire embedding space and extends through the needle to the body; in the released state, the slender anchor is released from the distal end of the needle and is set at an angle to the needle, and the extended end of the suture is separated from the first wire embedding space.

[0016] Compared with the prior art, the present invention provides a wire embedding space on the slender anchor to accommodate the suture attached to the slender anchor, so that the overall radial size of the slender anchor with the suture attached is much smaller than the sum of the radial sizes of the slender anchor and the suture, thereby greatly reducing the inner diameter of the needle, and further reducing the outer diameter of the needle, thereby reducing the size of the puncture hole when the needle pierces the tissue, thereby greatly reducing the risk of tissue tearing or other damage, and ensuring the effectiveness of tissue repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 and Figure 2 Schematic diagrams showing a system for deploying an elongated anchor in some embodiments in an initial state and a released state, respectively.

[0019] Figure 3-Figure 5 A schematic structural diagram of the slender anchor in the first embodiment is shown.

[0020] Figure 6 A schematic diagram showing an initial state of a system for deploying an elongated anchor in a first embodiment is shown.

[0021] Figure 7The schematic diagram shows a state where the elongated anchor in the first embodiment is completely pushed out of the needle.

[0022] Figure 8 The schematic diagram shows a state in which the slender anchor in the first embodiment abuts against tissue.

[0023] Fig. 9 A schematic diagram showing a state where the elongated anchor with sutures attached thereto in the first embodiment is implanted into a mitral valve to form an artificial chordae tendineae.

[0024] Figure 10-11 A schematic structural diagram of the slender anchor in the second embodiment is shown.

[0025] Fig.12 A schematic diagram showing an initial state of a system for deploying an elongated anchor according to a second embodiment.

[0026] Fig.13 A schematic diagram showing a state in which the elongated anchor in the second embodiment abuts against tissues is shown.

[0027] Fig.14 A schematic structural diagram of a slender anchor in a third embodiment is shown.

[0028] Fig.15 A schematic diagram showing an initial state of a system for deploying an elongated anchor according to a third embodiment.

[0029] Fig.16 A schematic diagram showing a state in which the elongated anchor in the third embodiment abuts against tissues is shown.

[0030] Fig.17 A schematic structural diagram of a slender anchor in a fourth embodiment is shown.

[0031] Fig.18 A schematic diagram showing an initial state of a system for deploying an elongated anchor according to a fourth embodiment.

[0032] Fig.19 A schematic diagram showing a state in which the elongated anchor in the fourth embodiment abuts against tissues is shown.

[0033] Fig. 20 A schematic structural diagram of a slender anchor in a fifth embodiment is shown.

[0034] Fig.21 A schematic diagram showing an initial state of a system for deploying an elongated anchor according to a fifth embodiment is shown.

[0035] Fig. 22 A schematic diagram showing a state in which the elongated anchor in the fifth embodiment abuts against tissues is shown.

[0036] Fig.23 A three-dimensional schematic diagram showing circular holes disposed on the outer surface of an elongated anchor in some embodiments is shown.

[0037] Fig.24 A three-dimensional schematic diagram showing a square hole disposed on the outer surface of an elongated anchor in some embodiments. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In addition, the following descriptions of the embodiments are made with reference to the attached diagrams to illustrate specific embodiments in which the present invention may be implemented. The directional terms mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", etc., are only with reference to the directions of the attached diagrams. Therefore, the directional terms used are for better and clearer description and understanding of the present invention, 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 limiting the present invention.

[0040] It should be noted that, in order to more clearly describe the slender anchor and the system for deploying the slender anchor provided by the present invention, the limited terms "proximal end" and "distal end" described in the specification of the present invention are all conventional terms in the medical field. Specifically, "distal end" refers to the end away from the operator during the surgical operation, and "proximal end" refers to the end close to the operator during the surgical operation; the direction of the central axis of rotation of an object such as a cylinder or a tube is defined as the axial direction; the circumferential direction is the direction around the axis of an object such as a cylinder or a tube (perpendicular to the axis and perpendicular to the cross-sectional radius); the radial direction is the direction along the diameter or radius. It is worth noting that the "end" in the terms such as "proximal end", "distal end", "one end", "the other end", "first end", "second end", "initial end", "end", "two ends", "free end", "upper end" and "lower end" is not limited to the end, end point or end face, but also includes a portion extending from the end, end point or end face on the element to which the end, end point or end face belongs for an axial distance and / or radial distance. Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those generally understood by technicians in the technical field of the present invention. The conventional terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not to be construed as limiting the present invention.

[0041] A system 100 for fixing a suture to an elongated anchor 20 and for deploying the elongated anchor 20 is provided to achieve treatment or repair of the tissue. The system 100 includes a needle 10, an elongated anchor 20, and a suture 30. The suture 30 is attached to the elongated anchor 20 and can be removably loaded in the needle 10 together. The needle 10 has a sharp distal end 11 for piercing the tissue. Further, the system 100 has an initial state and a released state. In the initial state, as shown in FIG. Figure 1 As shown, the elongated anchor 20 is pre-loaded on the distal end of the needle 10, the distal end of the suture 30 is attached to the elongated anchor 20, and the extended end of the suture 30 extends from the inside of the needle 10 to the proximal end until outside the body. Specifically, the elongated anchor 20 includes a first opening 21, a second opening 22, a wire passage 23 extending from the first opening 21 to the second opening 22, and a first wire embedding space 24 extending in the axial direction, and the first wire embedding space 24 is connected with the first opening 21. After the distal end of the suture 30 enters the wire passage 23 through the first opening 21, it further passes through the second opening 22 to be attached to the elongated anchor 20. When the elongated anchor 20 with the suture 30 attached is loaded axially on the distal end of the needle 10, the distal end of the suture 30 drawn out of the second opening 22 will be restricted outside the distal end of the elongated anchor 20, and the extended end of the suture 30 drawn out of the first opening 21 will be accommodated in the first wire embedding space 24 and extend through the needle 10 to outside the body. In the release state, Figure 2 As shown, the elongated anchor 20 is released from the distal end of the needle 10 to expose the elongated anchor 20; under the action of gravity or balance force, the elongated anchor 20 rotates and switches to a released state set at an angle to the needle 10. Specifically, the elongated anchor 20 rotates along the first opening 21, thereby causing the extended end of the suture 30 to escape from the first buried wire space 24. Relatively speaking, in order to realize the mutual switching between the initial state and the released state of the system 100, the extended end of the suture 30 can selectively switch between being accommodated in the first buried wire space 24 and being separated from the first buried wire space 24.

[0042] Compared with the prior art, the present invention provides a wire embedding space on the slender anchor to accommodate the suture attached to the slender anchor, so that the overall radial size of the slender anchor with the suture attached is much smaller than the sum of the radial sizes of the slender anchor and the suture. Therefore, in order to ensure the effectiveness of the slender anchor in repairing tissue, when the size of the needle is fixed, a slender anchor with a larger size can be accommodated to fix and support it on the tissue, thereby increasing the supporting area for the repaired tissue, thereby improving the anchoring force of the slender anchor on the tissue. Of course, when the size of the slender anchor is fixed, the slender anchor design of the present invention can greatly reduce the inner diameter of the needle, and further reduce the outer diameter of the needle, thereby reducing the size of the puncture hole when the needle pierces the tissue, thereby greatly reducing the risk of tissue tearing or other damage.

[0043] In some embodiments, the system 100 further comprises a push rod 40, which is removably loaded in the needle 10. The push rod 40 is pre-assembled as follows: Figure 1 The suture 30 and the push rod 40 are loaded into the needle 10 and are located on the proximal side of the slender anchor 20 in the manner shown, and extend proximally to the outside of the body together in the needle 10. After the sharp distal end 11 of the needle 10 is used to pierce the tissue to expose the sharp distal end 11, the push rod 40 is pushed distally to drive the slender anchor 20 to be released from the distal end of the needle 10, thereby completely exposing the slender anchor 20 outside the needle 10. At this time, the slender anchor 20 will rotate under the action of gravity or balance force to change from an undeployed state parallel to the needle 10 to an deployed state at a certain angle to the needle 10. Specifically, the slender anchor 20 has a first central axis X1, and the needle 10 has a second central axis X2. When the slender anchor 20 is in the undeployed state, as shown in FIG. Figure 1 As shown, the first central axis X1 is substantially parallel to or overlaps with the second central axis X2, and the extended end of the suture 30 is accommodated in the first buried wire space 24. When the elongated anchor 20 is in the deployed state, as shown in FIG. Figure 2 As shown, the first central axis X1 and the second central axis X2 form a certain angle, preferably 90 degrees. At this time, the extended end of the suture 30 has been separated from the first buried wire space 24 and is set at an angle of, for example, 90 degrees, to the first buried wire space 24.

[0044] It is understandable that, depending on the type and location of the repaired tissue, the needle 10 can be inserted perpendicular to the tissue or at a certain angle to the tissue. In addition, in order to ensure the support strength of the slender anchor 20, in some embodiments, the slender anchor 20 is made of a metal material, which can be a metal material that can be implanted in the human body, such as nickel titanium, stainless steel, etc. In view of the fact that the hardness of metal materials is higher than that of polymer materials, the support strength is greatly improved, thereby being able to better achieve the support and support effect on the tissue. Of course, in order to improve the endothelial climbing effect of the slender anchor 20, the slender anchor 20 is made of a porous material, such as porous titanium and other porous metals.

[0045] Figure 3-8The schematic diagram of the structure of the slender anchor 20a in the first embodiment is shown. The slender anchor 20a is a hollow metal tube structure, and has a distal end, a proximal end, a first central axis X1 extending between the distal end and the proximal end, and a tube wall radially offset from the first central axis X1. Specifically, a through hole is radially penetrated from the tube wall of the slender anchor 20a to form a first opening 21a, a second opening 22a, and a closed wire-passing channel 23a extending from the first opening 21a to the second opening 22a. At this time, the first opening 21a and the second opening 22a are arranged radially opposite to each other on the tube wall of the slender anchor 20a. In some embodiments, the through hole is arranged in the middle position of the slender anchor 20a and is arranged perpendicular to the first central axis X1 of the slender anchor 20a to ensure that the distal end and the proximal end of the slender anchor 20a can maintain balance; at this time, the wire-passing channel 23a will extend radially and perpendicularly between the first opening 21a and the second opening 22a. Further, the first opening 21a is cut along the tube wall of the slender anchor 20a to the proximal end of the slender anchor 20a to form a first wire embedding space 24a extending axially and communicating with the first opening 21a, and the second opening 22a is cut along the tube wall of the slender anchor 20a to the distal end of the slender anchor 20a to form a second wire embedding space 25a extending axially and communicating with the second opening 22a. At this time, the first wire embedding space 24a, the wire passage 23a and the second wire embedding space 25a are connected to form a first slender inner cavity 200a extending axially from the proximal end to the distal end of the slender anchor 20a, and the inner diameter of the first slender inner cavity 200a is the inner diameter of the tube body of the slender anchor 20a. In some embodiments, the first wire embedding space 24a and the second wire embedding space 25a are both grooves formed after cutting the tube wall of the slender anchor 20a.

[0046] It is understandable that if Figure 4As shown, when it is necessary to attach the suture 30 to the elongated anchor 20a, the distal end of the suture 30 is manipulated to enter the wire passage 23a from the first opening 21a of the elongated anchor 20a, and then pass through the second opening 22a. At this time, the second wire embedding space 25a is connected with the second opening 22a; after the distal end of the suture 30 passes through the second opening 22a, it can rotate along the second opening 22a to selectively switch between being accommodated in the second wire embedding space 25a and being separated from the second wire embedding space 25a, so as to selectively switch the distal end of the suture 30 between being restricted outside the second wire embedding space 25a and being restricted outside the second opening 22a. At the same time, the first wire embedding space 24a is connected with the first opening 21a; the extended end of the suture 30 extending from the first opening 21a can rotate along the first opening 21a to selectively switch between being accommodated in the first wire embedding space 24a and being separated from the first wire embedding space 24a. That is, by switching the distal end and the extended end of the suture 30 in the buried wire space of the elongated anchor 20a, the suture 30 is finally selectively switched between the undeployed state and the deployed state of the elongated anchor 20. At this time, the overall radial dimension of the elongated anchor 20a attached with the suture 30 is the radial dimension of the elongated anchor 20a, so its overall radial dimension is greatly reduced, thereby enabling the elongated anchor 20a to effectively ensure the bearing area after being fixed to the tissue, and also reduce the risk of tissue tearing by further reducing the outer diameter of the needle.

[0047] In some embodiments, the elongated anchor 20a includes only the first buried wire space 24a, and after the distal end of the suture 30 passes through the second opening 22a, it can rotate along the second opening 22a to selectively switch between being restricted outside the distal end of the elongated anchor 20a and being restricted outside the second opening 22a, so as to complete the switch between the undeployed state and the deployed state of the elongated anchor 20. Figure 5 As shown, when the suture 30 is in the undeployed state of the elongated anchor 20, the distal end of the suture 30 passing through the second opening 22a will extend axially outside the tube wall of the elongated anchor 20 to exceed the distal end of the elongated anchor 20a. At this time, only the extended end of the suture 30 is buried in the first buried wire space 24a to reduce its overall radial size, and the distal end of the suture 30 is not buried, so its overall radial size must be greater than the radial size of the elongated anchor 20a.

[0048] It should be particularly noted that, since the axial length of the slender anchor 20a is much larger than the radial width, the contact area between the suture 30 and the slender anchor 20a will be greatly reduced when the suture 30 passes through the wire passage 23a extending radially compared to the wire passage 23a extending axially, such as the wire passage 23d of the slender anchor 20d in the fourth embodiment and the wire passage 23e of the slender anchor 20e in the fifth embodiment. At this time, the risk of breakage caused by long-term wear of the suture 30 will be greatly reduced.

[0049] In some embodiments, the distal end of the suture 30 has a knot 300. After the distal end of the suture 30 passes through the second opening 22a, the distal end of the suture 30 is further knotted to form the knot 300. The size of the knot 300 must be larger than the size of the second opening 22a to ensure that the distal end of the suture 30 can always be confined outside the slender anchor 20a, thereby avoiding the risk of the distal end of the suture 30 detaching from the slender anchor 20a and causing the suture fixation to fail. In some embodiments, the suture 30 can be a single suture, or two or more sutures. The following description takes the double suture 30 as an example. Specifically, after the two distal ends of the double suture 30 enter the first opening 21a of the slender anchor 20a and pass through the second opening 22a, the two distal ends of the double suture 30 are knotted to form at least one knot 300. However, in the prior art, in order to ensure the connection stability between the suture and the slender anchor, surgical knots are often used in surgical implantation, and the number of surgical knots is generally set to 5 to 7. Therefore, there is a defect that the surgical knot is too long and easily rubs and collides with the tissue, which may cause myocarditis and other indications in severe cases, thereby aggravating the patient's condition and reducing the patient's survival rate. In addition, since the surgical knots tied manually are relatively loose, it is easy to tighten the surgical knots during the force-bearing process of the suture, resulting in a change of at least 2mm in the length of the surgical knot. In severe cases, the width of the surgical knot may also become smaller, causing the risk of detachment from the slender anchor. In order to avoid the above risks, the present invention preferably has 3 to 5 simple knots, and at the same time ensures that after the simple knot is formed, the length range L1 of the knot 300 is 2mm-6mm, the width range W1 of the knot 300 is 1.2mm-1.8mm, and the tail length L2 of the suture 30 is 3mm. Since the length L1 of the three simple knots is only half of the length of the five surgical knots, the risk of friction and collision with the tissue caused by the excessive length is greatly reduced, and the endothelial attachment effect after the slender anchor 20a fixes the suture 30 to the tissue is further guaranteed. The test experiment shows that the minimum connection force value of the two sutures 30 forming three simple knots and connecting with the slender anchor 30 is 15N, so the connection force value between the two is met to ensure the stability of the connection. Furthermore, the simple knot is tighter and firmer than the surgical knot, so there will be no large displacement change between the simple knots. The test experiment shows that the change of L2 before and after the test is less than 0.5mm, so as to maintain the appropriate tail line length L2. At the same time, the width W1 of the simple knot formed for the same suture is wider than the width of the surgical knot, which makes it less likely for the suture 30 to slip off and separate from the slender anchor 20a.

[0050] Thus, when the system 100 is in an initial state, the elongated anchor 20a is in an undeployed state, such as Figure 6As shown, at this time, the slender anchor 20a with the suture 30 attached is loaded in the needle 10. Take the slender anchor 20a having two thread embedding spaces as an example for explanation. Specifically, the slender anchor 20a is horizontally arranged at the distal end of the needle 10 along the axial direction. After the distal end of the suture 30 is accommodated in the second thread embedding space 25a of the slender anchor 20a, the knot 300 at the distal end is exposed and restricted outside the distal end of the second thread embedding space 25a, and the tail of the suture 30 does not exceed the distal end of the needle 10; the extended end of the suture 30 is accommodated in the first thread embedding space 24a along the axial direction, and extends axially proximally through the needle 10 to the outside of the body. At the same time, the distal end of the push rod 40 abuts against the proximal end of the slender anchor 20a, and the push rod 40 extends axially proximally in the needle 10, and can extend in the needle 10 parallel to the suture 30 along the axial direction. The implantation process of the system 100 is described below by taking the artificial chord implantation of the mitral valve as an example. Specifically, the sharp distal end 11 of the needle 10 is aligned with the leaflet of the mitral valve and the leaflet is punctured in a direction perpendicular to the leaflet to expose the sharp distal end 11 of the needle 10. Then, the push rod 40 is pushed axially to the distal end in vitro to drive the slender anchor 20a to be pushed axially to the distal end and to exceed the sharp distal end 11 of the needle 10 and then released from the needle 10. At this time, Figure 7 As shown in the figure, the knot 300 of the suture 30 and the elongated anchor 20a will be completely exposed outside the sharp distal end 11 of the needle 10. Under the action of gravity or in order to maintain a balanced state, the elongated anchor 20a will rotate, so that the extended end of the suture 30 is separated from the first buried wire space 24a along the first opening 21a, and the distal end of the suture 30 is separated from the second buried wire space 25a along the second opening 22a, thereby completing the switching of the elongated anchor 20a from the undeployed state parallel to the needle 10 to the deployed state at a certain angle to the needle 10 (see FIG. 2 ). Figure 2 ), at this time, the system 100 is in a released state. In the released state, the knot 300 at the distal end of the suture 30 will be switched to be exposed and confined outside the second opening 22a, thereby realizing the switching of the knot 300 between being confined outside the distal end of the second wire embedding space 25a and being confined outside the second opening 22a.

[0051] Once the slender anchor 20a in the needle 10 is released, the needle 10 is withdrawn from the mitral valve in the body to the outside of the body. At this time, the slender anchor 20a is in an expanded state, the distal end of the suture 30 is attached to the slender anchor 20a, and the extended end of the suture 30 extends through the valve leaflet to the outside of the body. The proximal end of the suture 30 is pulled outside the body to hold the slender anchor 20a against the valve leaflet to complete the fixation of the distal end of the suture 30. Since the axial size of the slender anchor 20a is much larger than the radial size, after the slender anchor 20a rotates, its axial size must be larger than the size of the puncture hole where the needle 10 punctures the valve leaflet. Therefore, after the slender anchor 20a is pressed against the valve leaflet, it will inevitably be unable to detach from the puncture hole of the valve leaflet. At the same time, if Figure 8As shown, the first opening 21a and the first buried wire space 24a are arranged toward the leaflet, and the second opening 22a, the second buried wire space 25a and the knot 300 are arranged away from the leaflet.

[0052] like Fig. 9 As shown, the slender anchor 20a is further used to support the leaflets, such as supporting the ventricular side of the leaflets. Since the slender anchor 20a is made of a high-strength metal material, it is not easy to deform and has good support. Even if a smaller-sized slender anchor 20a is used, the supporting force of the leaflets can be satisfied. For example, for a mitral valve prolapse width of less than 15 mm, it is only necessary to implant a slender anchor 20a with a length of 10 mm in the middle of the leaflet prolapse to achieve an effective support effect. Finally, another set of interventional instruments (not shown) can be introduced to use the ventricular implant 50 to connect the other end of the suture 30 to the ventricular tissue of the mitral valve, such as the papillary muscle or the free wall to form an artificial chord, thereby replacing or supplementing the natural chords inside the heart. At this time, the artificial chords between the leaflets and the ventricular tissue are established and repaired, thereby effectively preventing mitral valve regurgitation.

[0053] Figure 10-13The schematic diagram of the structure of the slender anchor 20b in the second embodiment is shown. The slender anchor 20b is a metal rod structure, and has a distal end, a proximal end, and an outer surface extending from the distal end to the proximal end. The first central axis X1 extends between the distal end and the proximal end of the slender anchor 20b, and the outer surface is formed by radially offsetting from the first central axis X1. Specifically, a through hole is radially penetrated along the outer surface of the slender anchor 20b to form a first opening 21b, a second opening 22b, and a closed wire passage 23b extending from the first opening 21b to the second opening 22b. At this time, the first opening 21b and the second opening 22b are arranged on the outer surface of the slender anchor 20b in a radially opposite manner. In some embodiments, the through hole is disposed in the middle of the elongated anchor 20b and is disposed along the first central axis X1 perpendicular to the elongated anchor 20b to ensure that the distal end and the proximal end of the elongated anchor 20b can maintain balance; at this time, the wire passage 23b will extend vertically and radially between the first opening 21b and the second opening 22b. Further, a wire embedding platform is formed by radially cutting along the outer surface of the elongated anchor 20b from the first opening 21b and axially extending to the proximal end of the elongated anchor 20b, thereby forming a first wire embedding space 24b extending axially and communicating with the first opening 21b, and a wire embedding platform is formed by radially cutting along the outer surface of the elongated anchor 20b from the second opening 22b and axially extending to the distal end of the elongated anchor 20b, thereby forming a second wire embedding space 25b extending axially and communicating with the second opening 22b. The first wire embedding space 24b and the second wire embedding space 25b are located on both sides of the wire passing channel 23b, wherein the first wire embedding space 24b, the wire passing channel 23b and the second wire embedding space 25b are connected to form a substantially Z-shaped suture extension space for accommodating the suture 40.

[0054] Similarly, when the distal end of the suture 30 is attached to the elongated anchor 20b, since the first buried wire space 24b is connected to the first opening 21b, the extended end of the suture 30 extending from the first opening 21b can selectively switch between being accommodated in the first buried wire space 24b and being separated from the first buried wire space 24b along the first opening 21b. At the same time, since the second buried wire space 25b is connected to the second opening 22b, the distal end of the suture 30 can selectively switch between being accommodated in the second buried wire space 25b and being separated from the second buried wire space 25b along the second opening 22b after passing through the second opening 22b. At this time, the distal end of the suture 30 can selectively switch between being restricted outside the distal end of the second buried wire space 25b and being restricted outside the second opening 22b.

[0055] Furthermore, in order to reduce the weight of the slender anchor 20b and thus reduce the movement burden caused by long-term stay in the tissue, the slender anchor 20b also includes at least one pair of hollow parts 26b that penetrate in the radial direction. Each pair of hollow parts 26b is symmetrically opened on both sides of the wire-passing channel 23b and is respectively connected to the first wire-burying space 24b or the second wire-burying space 25b to ensure that the distal end and the proximal end of the slender anchor 20b can maintain balance. In some embodiments, the number of the hollow parts 26b is a pair, including a first hollow part 261b and a second hollow part 262b. Specifically, the first hollow part 261b is located on the proximal side of the wire-passing channel 23b and is connected to the first wire-burying space 24b; the second hollow part 262b is located on the distal side of the wire-passing channel 23b and is connected to the second wire-burying space 25b.

[0056] It is understandable that a knot 300 is also provided at the distal end of the suture 30 to avoid the risk of the distal end of the suture 30 detaching from the slender anchor 20b and causing the suture fixation to fail. Since this feature is the same as the slender anchor 20a in the first embodiment, please refer to the detailed description of the first embodiment for details, which will not be repeated here.

[0057] Thus, when the system 100 is in the initial state, Fig.12 As shown, at this time, the slender anchor 20b is horizontally arranged at the distal end of the needle 10 along the axial direction, and after the distal end of the suture 30 is accommodated in the second buried wire space 25b of the slender anchor 20b, the knot 300 at the distal end is exposed and confined outside the distal end of the second buried wire space 25b, and the tail of the suture 30 does not exceed the distal end of the needle 10; the extended end of the suture 30 is accommodated in the first buried wire space 24b along the axial direction, and extends axially toward the proximal end through the needle 10. At the same time, the distal end of the push rod 40 abuts against the proximal end of the slender anchor 20b, and the push rod 40 extends axially toward the proximal end in the needle 10, and can extend axially parallel to the suture 30 in the needle 10. After the sharp distal end 11 of the needle 10 is used to align with the target position of the tissue and pierce the tissue, the push rod 40 is pushed distally to drive the slender anchor 20b to be released from the needle 10. Under the action of gravity or in order to maintain a balanced state, the slender anchor 20b will rotate to switch the system 100 to a released state, at which time the extended end of the suture 30 will be detached from the first buried wire space 24b along the first opening 21b, and the distal end of the suture 30 will be detached from the second buried wire space 25b along the second opening 22b, and the knot 300 at the distal end of the suture 30 will be switched to be exposed and confined outside the second opening 22b. That is, the knot 300 can selectively switch between being confined outside the distal end of the second buried wire space 25b and being confined outside the second opening 22b. Once the slender anchor 20b in the needle 10 is released, the needle 10 is withdrawn from the tissue; at this time, as shown in FIG. Fig.13As shown, the elongated anchor 20b is pressed against the tissue to fix the suture 30, and the first opening 21b and the first suture embedding space 24b are arranged toward the tissue, while the second opening 22b, the second suture embedding space 25b and the knot 300 are arranged away from the tissue.

[0058] Figure 14-16The schematic diagram of the structure of the slender anchor 20c in the third embodiment is shown. The slender anchor 20c is a metal rod structure, the outer diameter of the rod is in the range of 0.8mm-1.5mm, and the length is in the range of 5mm-10mm. The slender anchor 20c has a distal end, a proximal end, and an outer surface extending from the distal end to the proximal end. The first central axis X1 extends between the distal end and the proximal end of the slender anchor 20c, and the outer surface is formed by radially offsetting from the first central axis X1. Specifically, the opposite sides of the outer surface of the slender anchor 20c are radially cut and axially extended to the two ends (distal end and proximal end) of the slender anchor 20c to form two oppositely arranged buried wire grooves 201c and 202c. Next, a first extension groove 203c with three openings is cut from the proximal end of the slender anchor 20c along the axial direction of the two wire embedding grooves 201c and 202c toward the adjacent middle position of the slender anchor 20c to form a first extension groove 203c with three openings, and a second extension groove 204c with three openings is cut from the distal end of the slender anchor 20c along the axial direction of the two wire embedding grooves 201c and 202c toward the adjacent middle position of the slender anchor 20c to form a second extension groove 204c with three openings. In some embodiments, the width of the first extension groove 203c and the second extension groove 204c in the radial direction ranges from 2 mm to 5 mm, so that the suture 30 can be freely passed through. At this time, the first extension groove 203c and the second extension groove 204c can be connected with the two middle wire embedding grooves 201c and 202c left after cutting, and form a wire embedding portion 207c located in the middle position of the slender anchor 20c. The two middle wire embedding grooves 201c and 202c are respectively located at opposite end surfaces of the wire embedding portion 207c in the radial direction, and the first extension groove 203c and the second extension groove 204c are symmetrically arranged at opposite sides of the wire embedding portion 207c in the axial direction to ensure that the distal end and the proximal end of the slender anchor 20c can maintain balance. Among them, radial connecting parts 205c and 206c are symmetrically arranged in the extension grooves 203c and 204c, and each radial connecting part 205c or 206c is respectively surrounded by the corresponding extension groove 203c or 204c to form two pairs of first openings 21c and second openings 22c, and two closed wire-passing channels 23c extending radially from the first opening 21c to the second opening 22c, so as to allow the suture 30 to pass radially and prevent the suture 30 from escaping from the extension groove 203c or 204c. At this time, the two first openings 21c are connected to the middle buried wire groove 201c and are axially arranged on both sides of the middle buried wire groove 201c, and the two second openings 22c are connected to the middle buried wire groove 202c and are axially arranged on both sides of the middle buried wire groove 202c. Further, in order to enhance the strength of the slender anchor 20c, the radial connecting parts 205c and 206c are respectively arranged at positions close to both ends of the slender anchor 20c to avoid the risk of the two ends of the slender anchor 20c being easily broken.

[0059] It should be noted that if Fig.15As shown in FIG. 1 , the space formed by the middle wire embedding groove 201c, the first extension groove 203c and the radial connection portion 205c is defined as the first wire embedding space 24c, and the space formed by the middle wire embedding groove 202c, the second extension groove 204c and the radial connection portion 206c is defined as the second wire embedding space 25c, which is used to axially accommodate the suture 30. In order to increase the embedding effect of the suture 30 and minimize the exposure of the slender anchor 20c of the suture 30 in the radial direction, the diameter d of the radial connection portions 205c and 206c must not be higher than the height of the wire embedding portion 207c. In some embodiments, the height H (see FIG. 1 ) of the wire embedding portion 207c is preferably 0.05mm. Fig.16 ) is in the range of 0.5-1.1 mm, and the diameter d is in the range of 0.3 mm-0.6 mm. In addition, the width range of the buried wire portion 207c is greater than the diameter of the suture 30 so as to freely accommodate the suture 30, for example, the width range may be 1.0 mm-1.6 mm. Of course, in order to further reduce the possibility of the suture 30 exposing the slender anchor 20c in the radial direction, in other embodiments, the radial connecting portions 205c and 206c are arranged asymmetrically, the radial connecting portion 205c is arranged radially away from the middle buried wire groove 201c, and the radial connecting portion 206c is arranged radially away from the middle buried wire groove 202c, so as to increase the spatial range of the first buried wire space 24c and the second buried wire space 25c.

[0060] Then, when it is necessary to attach the suture 30 to the slender anchor 20c, taking the double sutures 30 as an example, the two distal ends of the two sutures 30 are manipulated to enter the corresponding wire passage 23c from the two first openings 21c of the slender anchor 20c, and after each passing through the corresponding second opening 22c, the two distal ends of the two sutures 30 are formed into at least one knot 300 by knotting. In view of the fact that the specific features of the knot 300 are the same as those of the slender anchor 20a in the first embodiment, please refer to the detailed description of the first embodiment for details, which will not be repeated here. Among them, the distal end of the suture 30 passing through the second opening 22c is accommodated in the second wire embedding space 25c, and the knot 300 at its distal end is exposed and restricted outside the distal end of the second wire embedding space 25c; at the same time, after the extended end of the suture 30 passing through the first opening 21c is axially accommodated in the first wire embedding space 24c, the slender anchor 20c is axially loaded as a whole at the distal end of the needle 10. At this time, the system 100 is in an initial state, as shown in FIG. Fig.15As shown. In the initial state, the tail of the suture 30 does not exceed the distal end of the needle 10, and the extended end of the suture 30 further extends axially toward the proximal end through the needle 10; at the same time, the distal end of the push rod 40 abuts against the proximal end of the slender anchor 20c, and the push rod 40 extends axially toward the proximal end in the needle 10, and can extend axially parallel to the suture 30 in the needle 10. After the sharp distal end 11 of the needle 10 is used to align the target position of the tissue and pierce the tissue, the push rod 40 is pushed distally to drive the slender anchor 20c to be released from the needle 10. Under the action of gravity or to maintain a balanced state, the slender anchor 20c will rotate to switch the system 100 to a released state, at which time the two extended ends of the suture 30 will each be detached from the first buried wire space 24c along the two first openings 21c, and the two distal ends of the suture 30 will each be detached from the second buried wire space 25c along the two second openings 22c, and the knot 300 at the distal end of the suture 30 will be switched to an intermediate position exposed and restricted outside the two second openings 22c. Once the slender anchor 20c in the needle 10 is released, the needle 10 is withdrawn from the tissue; at this time, as shown in FIG. Fig.16 As shown, the elongated anchor 20c will be held against the tissue to complete the fixation of the suture 30. The two first openings 21c and the first buried wire space 24c of the elongated anchor 20c are arranged toward the tissue, and the two second openings 22c, the second buried wire space 25c and the knot 300 are arranged away from the tissue; and the two extended ends of the suture 30 are against the buried wire portion 207c.

[0061] Figure 17-19The schematic diagram of the structure of the slender anchor 20d in the fourth embodiment is shown. The slender anchor 20d is a hollow metal tube structure or a polymer tube structure with high hardness, and has a distal end, a proximal end, a first central axis X1 extending between the distal end and the proximal end, and a tube wall radially offset from the first central axis X1. Specifically, by laser cutting or machining, the proximal end of the slender anchor 20d is axially cut along the tube wall of the slender anchor 20d to the adjacent middle position to form a proximal first opening 21d, and the distal end of the slender anchor 20d is axially cut along the tube wall of the slender anchor 20d to the adjacent middle position to form a distal first opening 21d; that is, the slender anchor 21d has two first openings 21d. The two first openings 21d are located on the same side of the first central axis X1 of the slender anchor 20d, and are symmetrically arranged at intervals to ensure that the distal end and the proximal end of the slender anchor 20d can maintain balance. In addition, the distal opening of the slender anchor 20d is defined as a second opening 22d, the space formed by the distal end of the slender anchor 20d to the distal end of the proximal first opening 21d is defined as a wire-passing channel 23d, and the space formed by the proximal end of the slender anchor 20d to the distal end of the proximal first opening 21d is defined as a first wire-burying space 24d. At this time, the wire-passing channel 23d extends between the first opening 21d and the second opening 22d, and is coaxially connected with the first wire-burying space 24d to form a second slender inner cavity 200d that axially passes from the proximal end of the slender anchor 20d to the distal end, and the inner diameter of the second slender inner cavity 200d is the inner diameter of the tube body of the slender anchor 20d.

[0062] Then, when it is necessary to attach the suture 30 to the elongated anchor 20d, taking two sutures 30 as an example, the two distal ends of the two sutures 30 are manipulated to enter the wire passage 23d from the two first openings 21d of the elongated anchor 20d, and then pass through the second opening 22d at the same time, and then the two distal ends of the two sutures 30 are formed into at least one knot 300 by tying a knot. Since the specific features of the knot 300 are the same as those of the elongated anchor 20a in the first embodiment, please refer to the detailed description of the first embodiment for details, which will not be repeated here. At this time, the knot 300 at the distal end of the suture 30 is exposed and restricted outside the second opening 22d. Since the axial direction of the knot 300 is consistent with the axial direction of the elongated anchor 20d, the risk of collision and friction between the knot 300 and the tissue can be eliminated. Next, after the extended end of at least one suture 30 passing through the first opening 21d is axially accommodated in the first thread embedding space 24d, the elongated anchor 20d is axially loaded on the distal end of the needle 10 as a whole. At this time, the system 100 is in the initial state, as shown in FIG. Fig.18As shown. In the initial state, the tail of the suture 30 does not exceed the distal end of the needle 10, and the extended end of the suture 30 further extends axially toward the proximal end through the needle 10; at the same time, the distal end of the push rod 40 abuts against the proximal end of the slender anchor 20d, and the push rod 40 extends axially toward the proximal end in the needle 10, and can extend axially parallel to the suture 30 in the needle 10. After the sharp distal end 11 of the needle 10 is used to align the target position of the tissue and pierce the tissue, the push rod 40 is pushed distally to drive the slender anchor 20d to be released from the needle 10. Under the action of gravity or in order to maintain a balanced state, the slender anchor 20d will rotate to switch the system 100 to the release state, at which time, at least one extended end of the suture 30 will be detached from the first buried thread space 24d along the first opening 21d, and the knot 300 at the distal end of the suture 30 is still confined outside the second opening 22d. Once the release of the elongated anchor 20d in the needle 10 is completed, the needle 10 is withdrawn from the tissue; at this time, as shown in FIG. Fig.19 As shown, the elongated anchor 20d will abut against the tissue to complete the fixation of the suture 30. The two first openings 21d and the first suture embedding space 24d of the elongated anchor 20d are arranged toward the tissue, and the two extending ends of the suture 30 abut against the distal side of the proximal first opening 21d and the proximal side of the distal first opening 21d, respectively.

[0063] Figure 20-22 The schematic diagram of the structure of the slender anchor 20e in the fifth embodiment is shown. The slender anchor 20e is a hollow metal tube structure or a polymer tube structure with high hardness, and has a distal end, a proximal end, a first central axis X1 extending between the distal end and the proximal end, and a tube wall radially offset from the first central axis X1. Specifically, the tube wall of the slender anchor 20e is axially cut from the proximal end of the slender anchor 20e to the adjacent middle position by laser cutting or machining, so as to form a first opening 21e. At the same time, the distal opening of the slender anchor 20d is defined as a second opening 22d, the space formed by the distal end of the slender anchor 20e to the distal end of the first opening 21e is defined as a wire passage 23e, and the space formed by the proximal end of the slender anchor 20e to the distal end of the first opening 21e is defined as a first wire embedding space 24e. At this time, the wire passage 23e extends between the first opening 21e and the second opening 22e, and is coaxially connected with the first wire embedding space 24e to form a third slender inner cavity 200e that axially passes from the proximal end to the distal end of the slender anchor 20e, and the inner diameter of the second slender inner cavity 200e is the inner diameter of the tube body of the slender anchor 20e.

[0064] Then, when it is necessary to attach the suture 30 to the elongated anchor 20e, taking two sutures 30 as an example, the two distal ends of the two sutures 30 are manipulated to enter the wire passage 23e from the first opening 21e of the elongated anchor 20e, and at the same time pass through the second opening 22e, and then the two distal ends of the two sutures 30 are formed into at least one knot 300 by tying a knot. Since the specific features of the knot 300 are the same as those of the elongated anchor 20a in the first embodiment, please refer to the detailed description of the first embodiment for details, which will not be repeated here. At this time, the knot 300 at the distal end of the suture 30 is exposed and restricted outside the second opening 22e. Since the axial direction of the knot 300 is consistent with the axial direction of the elongated anchor 20e, the risk of collision and friction between the knot 300 and the tissue can be eliminated. Next, the extended ends of the two sutures 30 passing through the first opening 21e are axially accommodated in the first thread embedding space 24e, and the elongated anchor 20e is integrally axially loaded on the distal end of the needle 10. At this time, the system 100 is in the initial state, as shown in FIG. Fig.21 As shown. In the initial state, the tail of the suture 30 does not exceed the distal end of the needle 10, and the extended end of the suture 30 further extends axially toward the proximal end through the needle 10; at the same time, the distal end of the push rod 40 abuts against the proximal end of the slender anchor 20e, and the push rod 40 extends axially toward the proximal end in the needle 10, and can extend axially parallel to the suture 30 in the needle 10. After the sharp distal end 11 of the needle 10 is used to align the target position of the tissue and pierce the tissue, the push rod 40 is pushed distally to drive the slender anchor 20e to be released from the needle 10. Under the action of gravity or in order to maintain a balanced state, the slender anchor 20e will rotate to switch the system 100 to the release state, at which time, the two extended ends of the suture 30 will be detached from the first buried wire space 24e along the first opening 21e, and the knot 300 at the distal end of the suture 30 is still confined outside the second opening 22e. Once the release of the elongated anchor 20e in the needle 10 is completed, the needle 10 is withdrawn from the tissue; at this time, as shown in FIG. Fig. 22 As shown, the elongated anchor 20e will abut against the tissue to complete the fixation of the suture 30. The first opening 21e and the first buried wire space 24e of the elongated anchor 20e are arranged toward the tissue, and the two extended ends of the suture 30 abut against the distal side of the first opening 21e.

[0065] It is understood that in order to improve the endothelial climbing effect of the elongated anchor 20, in some embodiments, such as Fig.23 and 24 As shown, the applicant can increase the porosity of the elongated anchor 20 by providing micropores 2000 on the outer surface of the elongated anchor 20, such as circular holes, square holes, elliptical holes, triangular holes or polygonal holes. Fig.23It is shown that a plurality of circular holes 2000a are arranged circumferentially on the outer surface of the slender anchor 20, wherein each circular hole 2000a radially penetrates the tube wall or side wall of the slender anchor 20. The preferred diameter range of the circular holes 2000a is 0.06mm-0.09mm, and the preferred spacing range between each two adjacent circular holes 2000a is 0.025mm-0.05mm. Fig.24 It is shown that a plurality of square holes 2000b are arranged circumferentially on the outer surface of the slender anchor 20, wherein each square hole 2000b radially penetrates the tube wall or side wall of the slender anchor 20. The preferred length range of each square hole 2000b is 0.08mm-0.13mm, the preferred width range is 0.025mm-0.03mm, and the preferred spacing range between each two adjacent square holes 2000b is 0.025mm-0.05mm. In view of the hollow design scheme of setting micropores on the outer surface of the slender anchor 20, the surface area and porosity of the slender anchor 20 can be increased to increase the contact surface with the blood, so that the endothelial attachment effect of the slender anchor 20 is better and the attachment time is shorter. After testing and verification, the micropores set in the slender anchor 20 are more conducive to cell attachment and will not cause thrombosis and inflammation. Of course, in other embodiments, the applicant may also cover the outer surface of the slender anchor 20 with a film having micropores, for example, a PET film having micropores or a polymer film having micropores may be wrapped on the outer surface. Alternatively, the outer surface of the slender anchor 20 may be processed to form a non-smooth surface, for example, sandblasting or processing textures on the outer surface of the slender anchor 20, so as to improve the endothelial climbing effect of the slender anchor 20.

[0066] The above is an implementation method of the embodiment of the present invention. It should be noted that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the embodiment of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention. The above is an implementation method of the embodiment of the present invention. It should be noted that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the embodiment of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. An elongated anchor for securing a suture to tissue, characterized in that The elongated anchor comprises: First opening; The second opening; A wire passage extending from the first opening to the second opening; and A first wire-burying space extending in the axial direction, wherein the first wire-burying space is communicated with the first opening; The distal end of the suture enters the wire passage through the first opening and passes through the second opening to be attached to the elongated anchor; the extended end of the suture selectively switches between being accommodated in the first wire embedding space and being separated from the first wire embedding space.

2. The elongated anchor according to claim 1, characterized in that The elongated anchor further includes a second wire embedding space extending axially, the second wire embedding space being connected to the second opening, and after the distal end of the suture passes through the second opening, it selectively switches between being accommodated in the second wire embedding space and being separated from the second wire embedding space.

3. The elongated anchor according to claim 2, characterized in that The wire-passing channel extends radially between the first opening and the second opening, and the first opening and the second opening are arranged radially opposite to each other on two sides of the elongated anchor.

4. The elongated anchor according to claim 3, characterized in that The elongated anchor has opposite distal and proximal ends. The first wire embedding space extends axially from the first opening to the proximal end of the elongated anchor. The second wire embedding space extends axially from the second opening to the distal end of the elongated anchor.

5. The elongated anchor according to claim 4, characterized in that The first wire embedding space, the wire passing channel and the second wire embedding space are connected to form a first elongated inner cavity extending axially from the proximal end of the elongated anchor to the distal end of the elongated anchor.

6. The elongated anchor according to claim 4, characterized in that The first wire embedding space and the second wire embedding space are located on both sides of the wire passing channel, and the first wire embedding space, the wire passing channel and the second wire embedding space are connected to form a Z-shaped suture extension space.

7. The elongated anchor according to claim 6, characterized in that The slender anchor further includes at least one pair of hollow portions penetrating in the radial direction, wherein the pair of hollow portions are symmetrically arranged on both sides of the wire passing channel and are respectively connected to the first wire embedding space or the second wire embedding space.

8. The elongated anchor according to claim 4, characterized in that A first extension groove is formed by extending axially from the proximal end of the slender anchor toward the adjacent middle position of the slender anchor, and a second extension groove is formed by extending axially from the distal end of the slender anchor toward the adjacent middle position of the slender anchor. The first extension groove and the second extension groove are arranged at intervals, and a radial connecting portion is arranged in each extension groove. Each extension groove and the corresponding radial connecting portion surround the first opening, the second opening and the wire passing channel.

9. The elongated anchor according to claim 1, characterized in that The wire-passing channel extends axially and communicates with the first wire-embedded space to form a second elongated inner cavity extending axially from the proximal end of the elongated anchor to the distal end of the elongated anchor. Two first openings are spaced apart on the same side of the elongated anchor.

10. The elongated anchor of claim 1, wherein: At least a portion of the outer surface of the elongated anchor is non-smooth.

11. The elongated anchor of claim 10, wherein: The slender anchor is made of porous material, or the outer surface of the slender anchor has micropores, or the outer surface of the slender anchor is covered with a film with micropores, or the outer surface of the slender anchor is a non-smooth surface.

12. The elongated anchor of claim 2, wherein: The elongated anchor can be abutted against the tissue to support the tissue. When the elongated anchor is abutted against the tissue, the first opening and the first wire embedding space are disposed toward the tissue, and the second opening and the second wire embedding space are disposed away from the tissue.

13. A system for deploying an elongated anchor, characterized in that: The system comprises: a needle having a sharp distal end for piercing tissue; Sutures; and The elongated anchor as claimed in any one of claims 1 to 12; The system has an initial state and a released state. In the initial state, the slender anchor is axially loaded on the distal end of the needle, and the extended end of the suture is accommodated in the first wire embedding space and extends through the needle to the body; in the released state, the slender anchor is released from the distal end of the needle and is set at an angle to the needle, and the extended end of the suture is separated from the first wire embedding space.

14. The system of claim 13, wherein: The elongated anchor further comprises a second wire embedding space extending in the axial direction, the second wire embedding space being in communication with the second opening, the distal end of the suture has a knot, and the knot is selectively switched between being restricted outside the second wire embedding space and being restricted outside the second opening.

Images