Knotting-free anchor with line and winding method thereof

Abstract

The invention provides a knotting-free anchor with a line and a winding method thereof, and relates to the technical field of medical instruments.The knotting-free anchor with the line comprises an anchor body, the anchor body is provided with an implantation end and an opening end, a winding cavity and a clamping cavity are formed in the anchor body, the winding cavity is provided with a line inlet channel and a line outlet channel, and an auxiliary line penetrates through the line inlet channel and the line outlet channel; one ends of the thread inlet channel and the thread outlet channel are communicated, the other ends of the thread inlet channel and the thread outlet channel extend to the opening end, and the clamping cavity is communicated with the thread outlet channel and used for limiting the position of the end of the self-locking thread. According to the knotting-free anchor with the thread, damage to the self-locking suture can be effectively reduced, meanwhile, the complexity of the production link can be reduced, and the difficulty of product full-life-cycle management is lowered.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a knot-free wire anchor and a winding method thereof. Background Art

[0002] Wire anchors are widely used in sports medicine as key implants for soft tissue and bone reconstruction. Their typical structure consists of an anchor body and accompanying sutures. Their mechanism of action involves inserting the anchor body into the bone tissue, and using the sutures to secure the soft tissue to the bone surface, providing a structural foundation for bone-tendon healing. Existing anchor fixation mechanisms fall into two main categories: traditional anchors require the surgeon to perform external knotting, while improved anchors employ knot-free designs to simplify the surgical process.

[0003] Current knotless anchors secure sutures via external threads within the anchor body. To use, the suture must first be threaded through the anchor head, then screwed into a pre-drilled bone hole. The external threads squeeze the suture to secure it. However, this approach has the following drawbacks: 1. The radial pressure generated by the screwing in can damage the suture; 2. The separate design of the head and body not only increases the complexity of the production process, but also makes product lifecycle management more difficult. Summary of the Invention

[0004] The purpose of the present invention is to provide a knot-free wire anchor and a winding method thereof, which can effectively reduce the damage caused to the self-locking suture, while reducing the complexity of the production process and reducing the difficulty of product life cycle management.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: In the first aspect, the present invention provides a knot-free wire anchor, comprising an anchor body, the anchor body having an implantation end and an open end, a winding cavity and a fixing cavity being provided in the anchor body, the winding cavity having an inlet channel and an outlet channel for auxiliary wire threading, one end of the inlet channel and the outlet channel being connected, and the other end both extending to the open end, the fixing cavity being connected to the outlet channel, and the fixing cavity being used to limit the position of the end of the self-locking suture.

[0006] In an optional embodiment, the fixing cavity is located on a side of the winding cavity close to the implantation end.

[0007] In an optional embodiment, the fixing cavity is opened on the side wall of the anchor body and extends toward the interior of the anchor body, and the fixing cavity is connected with the wire outlet channel through a wire passing channel.

[0008] In an optional embodiment, the anchor body includes a nail body and a tip integrally connected to the nail body, the outer surface of the nail body has an external thread, the end of the nail body away from the tip is the open end, the winding cavity and the fixing cavity are provided in the nail body, and the end of the tip away from the nail body is the implantation end.

[0009] In an optional embodiment, a hook portion is provided in the nail body, and the hook portion is located between the wire inlet channel and the wire outlet channel.

[0010] In an optional embodiment, the side wall of the nail body is provided with a first opening and a second opening, the first opening is connected to the wire inlet channel, the second opening is connected to the wire outlet channel, the first opening and the second opening are arranged opposite to each other along the radial direction of the nail body, and the hook portion is located between the first opening and the second opening.

[0011] In an optional embodiment, the second opening is connected to the fixing cavity through the wire-passing channel, and the wire-passing channel is opened on the side wall of the nail body.

[0012] In an optional embodiment, the open end is provided with a connection hole for cooperating with a driving member, and the inlet channel and the outlet channel are both connected to the connection hole.

[0013] In an optional embodiment, it further includes an auxiliary thread and a self-locking suture; The end of one end of the self-locking suture is confined in the fixing cavity, and the other end of the self-locking suture extends out of the outlet channel; One end of the auxiliary line is provided with a wire loop, and the other end extends into the wire inlet channel and extends out from the wire outlet channel.

[0014] In a second aspect, the present invention provides a method for winding a knotless wire anchor, using the knotless wire anchor as described in any of the aforementioned embodiments, comprising: Passing the end of the self-locking suture away from the end through the loop in the auxiliary line; Pull the auxiliary wire out of one end of the wire outlet channel, and the wire loop enters the anchor body until the auxiliary wire is completely pulled out of the wire outlet channel; Pull the end of the self-locking suture away from the end head tight.

[0015] The knot-free wire anchor and the winding method thereof provided by the present invention can produce the following beneficial effects: In the knotless suture - carrying anchor provided by the present invention, the end of the self - locking suture can be limited within the clamping cavity, and the other end can extend out from the wire outlet channel, ensuring the stability of the position of the end relative to the anchor body. The auxiliary wire can be threaded through the wire inlet channel and the wire outlet channel, and by operating the auxiliary wire, the self - locking suture can fix soft tissue to the bone surface. It gets rid of the traditional way of radially extruding the self - locking suture through external threads, effectively reducing the damage to the self - locking suture. In addition, there is no need to design a split - type nail head and nail body, reducing the complexity of the production process and the difficulty of product full - life - cycle management.

[0016] The winding method of the knotless suture - carrying anchor provided in the second aspect of the present invention uses the knotless suture - carrying anchor provided in the first aspect of the present invention, thus having all the beneficial effects of the knotless suture - carrying anchor provided in the first aspect of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a three - dimensional structure diagram of a knotless suture - carrying anchor provided by an embodiment of the present invention; Figure 2 It is a side view of a knotless suture - carrying anchor provided by an embodiment of the present invention; Figure 3 For Figure 2 the A - A cross - sectional view of Figure 4 It is a three - dimensional structure diagram of an anchor body provided by an embodiment of the present invention from the first perspective; Figure 5 It is a three - dimensional structure diagram of an anchor body provided by an embodiment of the present invention from the second perspective; Figure 6 It is a three - dimensional structure diagram of a partial structure of an anchor body provided by an embodiment of the present invention; Figure 7 It is a three - dimensional structure diagram of an anchor body provided by an embodiment of the present invention from the third perspective; Figure 8 It is a three - dimensional structure diagram of an auxiliary wire provided by an embodiment of the present invention; Figure 9 It is a three - dimensional structure diagram of a self - locking suture provided by an embodiment of the present invention.

[0019] Icon: 1 - Anchor screw body; 11 - Screw body; 111 - Wire winding cavity; 1111 - Inlet channel; 1112 - Outlet channel; 112 - Fixing cavity; 113 - Wire passing channel; 114 - Hooking part; 115 - First opening; 116 - Second opening; 117 - Connecting hole; 12 - Tip; 2 - Auxiliary line; 21 - Wire loop; 3 - Self - locking suture; 31 - End. Detailed implementation mode

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work belong to the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The following will describe in detail the specific implementation modes of the present invention with reference to the accompanying drawings. It should be understood that the specific implementation modes described here are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0024] An embodiment of the first aspect of the present invention is to provide a knot - free suture - carrying anchor screw, as Figure 1 and Figure 2As shown, it includes an anchor screw body 1. The anchor screw body 1 has an implant end and an open end. A wire winding cavity 111 and a clamping cavity 112 are provided inside the anchor screw body 1. The wire winding cavity 111 has an inlet channel 1111 and an outlet channel 1112 for assisting the threading of the wire 2. One end of the inlet channel 1111 and the outlet channel 1112 is connected, and the other end extends to the open end. The clamping cavity 112 is communicated with the outlet channel 1112, and the clamping cavity 112 is used to define the position of the end 31 of the self-locking suture 3.

[0025] In the knotless suture anchor provided by the embodiment of the first aspect of the present invention, as Figure 3 shown, the end 31 of the self-locking suture 3 can be fixed in the clamping cavity 112, and the other end can extend out from the outlet channel 1112, ensuring the stability of the position of the end 31 relative to the anchor screw body 1. The auxiliary wire 2 can be threaded through the inlet channel 1111 and the outlet channel 1112, and by operating the auxiliary wire 2, the self-locking suture 3 can fix the soft tissue to the bone surface.

[0026] The above knotless suture anchor gets rid of the traditional way of radially squeezing the self-locking suture through external threads, effectively reducing the damage to the self-locking suture. In addition, there is no need to design a split nail head and nail body, reducing the complexity of the production process and the difficulty of product full life cycle management.

[0027] Referring to Figure 3 shown, the implant end of the anchor screw body 1 is Figure 3 the upper end of the anchor screw body 1 in Figure 3 and the open end of the anchor screw body 1 is

[0028] the lower end of the anchor screw body 1 in

[0029] It should be noted that the position of the clamping cavity 112 relative to the wire winding cavity 111 is not limited to a certain place. For example, the clamping cavity 112 can be located on the side of the wire winding cavity 111, and the clamping cavity 112 is communicated with the side of the wire winding cavity 111. Figure 3 shown, the clamping cavity 112 is located on the side of the wire winding cavity 111 close to the implant end.

[0030] The advantage of the above embodiment is that after the end 31 in the self-locking suture 3 is fixed in the clamping cavity 112, it can extend upward and out of the outlet channel 1112. Compared with the clamping cavity 112 being located on the side of the wire winding cavity 111, the bending degree of the self-locking suture 3 when entering the outlet channel 1112 can be reduced, and thus the friction force between the self-locking suture 3 and the anchor screw body 1 at this place can be reduced.

[0031] In a preferred embodiment, the fixing cavity 112 is located on the side of the outlet channel 1112 close to the implantation end, so that the self-locking suture 3 can extend vertically upward from the end 31 and enter the outlet channel 1112, making the self-locking suture 3 smoother in the initial state, and also facilitating the installation of the self-locking suture 3.

[0032] Specifically, the position of the end head 31 is limited by the clamping connection between the clamping cavity 112 and the end head 31, without the need for other connecting parts, thereby simplifying the structure of the knot-free wire anchor.

[0033] In an optional embodiment, if Figure 3 As shown, the fixing cavity 112 is opened on the side wall of the anchor body 1 and extends toward the interior of the anchor body 1 . The fixing cavity 112 is connected with the wire outlet channel 1112 through the wire passing channel 113 .

[0034] In the above embodiment, the fixing cavity 112 forms a side opening on the side wall of the anchor body 1. Since the fixing cavity 112 is opened on the side wall of the anchor body 1, when installing the self-locking suture 3, the end of the self-locking suture 3 away from the end head 31 can be first extended from the fixing cavity 112 into the wire passage 113, and then extended from the wire outlet passage 1112. As the above end is extended, the end head 31 will eventually enter the side opening and be stuck in the fixing cavity 112.

[0035] Specifically, the cross-section of the fixing cavity 112 can be circular, rectangular, elliptical, trapezoidal, etc.

[0036] It can be understood that the above cross section is perpendicular to the extension direction of the fixing cavity 112 .

[0037] In a preferred embodiment, the cross section of the securing cavity 112 is circular, and the securing cavity 112 is cylindrical.

[0038] In an optional embodiment, if Figure 4 As shown, the anchor body 1 includes a nail body 11 and a tip 12 integrally connected to the nail body 11. The outer surface of the nail body 11 has an external thread, and the end of the nail body 11 away from the tip 12 is an open end. A winding cavity 111 and a fixing cavity 112 are provided in the nail body 11. The outer diameter of the tip 12 is smaller than the outer diameter of the nail body 11, and the end of the tip 12 away from the nail body 11 is an implantation end.

[0039] In the above embodiment, the nail body 11 and the tip 12 adopt an integrated structure, which can effectively reduce the manufacturing, processing and management costs.

[0040] In addition, when in use, there is no need to pre-drill a hole in the bone surface, especially for patients with relatively porous bones. The top 12 can be inserted into the cortical bone surface first, and the nail body 11 can be self-drilled into the bone by the external thread on the outer surface of the nail body 11.

[0041] Therefore, the above knotless suture - carrying anchor does not require pre - drilling holes in the bone, simplifies the surgical operation steps, and reduces the loss of the patient's own bone tissue.

[0042] In an alternative embodiment, as Figure 4 and Figure 5 shown, the side wall of the nail body 11 is provided with a first opening 115 and a second opening 116. The first opening 115 is communicated with the wire inlet channel 1111, and the second opening 116 is communicated with the wire outlet channel 1112. The first opening 115 and the second opening 116 are oppositely arranged along the radial direction of the nail body 11.

[0043] The settings of the first opening 115 and the second opening 116 can make at least part of the self - locking suture 3 in the wire inlet channel 1111 and the wire outlet channel 1112 visible. On the one hand, it improves the visibility during the assembly process, and on the other hand, it increases the space of the wire inlet channel 1111 and the wire outlet channel 1112, thus being more conducive to the user to fix the soft tissue to the bone surface by operating the auxiliary wire 2 to realize the self - locking suture 3.

[0044] Specifically, both the first opening 115 and the second opening 116 are waist - shaped, and the length directions of both are parallel to the axial direction of the nail body 11.

[0045] In an alternative embodiment, as Figure 4 and Figure 5 shown, a hooking portion 114 is provided in the nail body 11, and the hooking portion 114 is located between the wire inlet channel 1111 and the wire outlet channel 1112.

[0046] When installing the auxiliary wire 2, as Figure 3 shown, the auxiliary wire 2 can enter from the wire inlet channel 1111 on one side of the hooking portion 114 and reach below the hooking portion 114, and then extend out from the wire outlet channel 1112 on the other side of the hooking portion 114. In this way, the middle part of the auxiliary wire 2 can be hooked on the hooking portion 114.

[0047] The hooking portion 114 is waist - drum - shaped, and the axial direction of the hooking portion 114 is parallel to the planes where the first opening 115 and the second opening 116 are located.

[0048] The above settings can make the hooking portion 114 form a structure with a middle depression along its own axial direction, thus facilitating the positioning of the suture wound around it. In addition, the above settings can also make one end of the wire inlet channel 1111 close to the opening end and one end of the wire outlet channel 1112 close to the opening end communicate, increasing their communication area, thus facilitating the threading of the self - locking suture 3 and the auxiliary wire 2.

[0049] Specifically, since the auxiliary line 2 is bent at the hooking portion 114, after the auxiliary line 2 is withdrawn, the self-locking suture 3 also needs to be wound around the hooking portion 114. The hooking portion 114 is located between the first opening 115 and the second opening 116, so that there is a relatively large space on both sides of the hooking portion 114 to accommodate the auxiliary line 2 and the self-locking suture 3.

[0050] In an alternative embodiment, as Figure 4 shown, the second opening 116 communicates with the clamping cavity 112 through a wire passing channel, and the wire passing channel 113 is opened on the side wall of the nail body 11.

[0051] When installing the self-locking suture 3, the end of the self-locking suture 3 away from the end 31 can be inserted into the wire outlet channel 1112 from the second opening 116 and then extended out from the wire outlet channel 1112. As the above-mentioned end extends, the end 31 will eventually be stuck in the clamping cavity 112. The above setting is more convenient for the installation of the self-locking suture 3.

[0052] In an alternative embodiment, as Figure 6 and Figure 7 shown, the open end is provided with a connection hole 117 for cooperating with the driving member, and both the wire inlet channel 1111 and the wire outlet channel 1112 communicate with the connection hole 117.

[0053] During use, the driving member can be engaged with the connection hole 117, and the driving member drives the connection hole 117 to rotate, so that the anchor bolt body 1 is self-tapped into the bone.

[0054] The above-mentioned connection hole 117 can be a regular polygon, an ellipse, a trapezoid, etc., and any shape that can transmit torque is acceptable.

[0055] As Figure 7 shown, the connection hole 117 is square.

[0056] In an alternative embodiment, as Figure 8 and Figure 9 shown, the knotless suture anchor further includes an auxiliary line 2 and a self-locking suture 3; the end 31 of one end of the self-locking suture 3 is limited in the clamping cavity 112, and the other end of the self-locking suture 3 extends out from the wire outlet channel 1112; one end of the auxiliary line 2 has a wire loop 21, and the other end extends into the wire inlet channel 1111 and extends out from the wire outlet channel 1112.

[0057] In use, first pass the self-locking suture 3 from bottom to top around the soft tissue to be fixed; then pass one end of the self-locking suture 3 far from the end 31 through the wire loop 21 in the auxiliary wire 2, and pull the end of the auxiliary wire 2 extending out of the wire outlet channel 1112. The wire loop 21 enters the wire inlet channel 1111, and at the same time, one end of the self-locking suture 3 far from the end 31 is brought into the wire inlet channel 1111. As the auxiliary wire 2 is pulled out from the wire outlet channel 1112, the self-locking suture 3 bypasses the bottom end of the hooking part 114 and enters the wire outlet channel 1112 and extends out until the auxiliary wire 2 is completely pulled out; finally, just tighten one end of the self-locking suture 3 far from the end 31. The self-locking suture 3 is limited in the anchor body 1 under the action of the friction force between the inner walls of the wire inlet channel 1111 and the wire outlet channel 1112.

[0058] An embodiment of the second aspect of the present invention lies in providing a winding method for a suture-carrying anchor without knotting. The winding method for the suture-carrying anchor without knotting provided by the embodiment of the second aspect of the present invention uses the above-mentioned suture-carrying anchor without knotting, and includes: Pass one end of the self-locking suture 3 far from the end 31 through the wire loop 21 in the auxiliary wire 2; Pull the end of the auxiliary wire 2 extending out of the wire outlet channel 1112, and the wire loop 21 enters the anchor body 1 until the auxiliary wire 2 is completely pulled out from the wire outlet channel 1112; Tighten one end of the self-locking suture 3 far from the end 31.

[0059] The winding method for the suture-carrying anchor without knotting provided by the embodiment of the second aspect of the present invention has the suture-carrying anchor without knotting provided by the embodiment of the first aspect of the present invention, and thus has all the beneficial effects of the suture-carrying anchor without knotting provided by the embodiment of the first aspect of the present invention.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A knotless suture - attached anchor, characterized in that, The invention comprises an anchor body (1), wherein the anchor body (1) has an implantation end and an open end, and a winding cavity (111) and a fixing cavity (112) are provided in the anchor body (1), wherein the winding cavity (111) has an inlet channel (1111) and an outlet channel (1112) for passing an auxiliary wire (2), wherein one end of the inlet channel (1111) and the outlet channel (1112) are connected, and the other end both extend to the open end, and the fixing cavity (112) is connected to the outlet channel (1112), and the fixing cavity (112) is used to define the position of the end (31) of the self-locking suture (3).

2. The knotless suture - attached anchor according to claim 1, wherein, The fixing cavity (112) is located on a side of the winding cavity (111) close to the implant end.

3. The knotless suture - carrying anchor according to claim 1, wherein, The fixing cavity (112) is opened on the side wall of the anchor body (1) and extends toward the interior of the anchor body (1); the fixing cavity (112) is connected to the wire outlet channel (1112) via the wire passage (113).

4. The knotless suture - carrying anchor according to claim 3, wherein, The anchor body (1) comprises a nail body (11) and a tip (12) integrally connected to the nail body (11); the outer surface of the nail body (11) has an external thread; the end of the nail body (11) facing away from the tip (12) is the open end; the winding cavity (111) and the fixing cavity (112) are provided in the nail body (11); the end of the tip (12) facing away from the nail body (11) is the implantation end.

5. The knotless suture - carrying anchor according to claim 4, wherein, A hook portion (114) is provided in the nail body (11), and the hook portion (114) is located between the inlet channel (1111) and the outlet channel (1112).

6. The knotless suture - carrying anchor according to claim 5, wherein, The side wall of the nail body (11) is provided with a first opening (115) and a second opening (116), the first opening (115) being in communication with the inlet channel (1111), and the second opening (116) being in communication with the outlet channel (1112), the first opening (115) and the second opening (116) being arranged opposite to each other along the radial direction of the nail body (11), and the hooking portion (114) being located between the first opening (115) and the second opening (116).

7. The knotless suture - carrying anchor according to claim 6, wherein, The second opening (116) is in communication with the fixing cavity (112) via the wire-passing channel, and the wire-passing channel (113) is provided on the side wall of the nail body (11).

8. The knotless suture - carrying anchor according to claim 1, wherein, The open end is provided with a connection hole (117) for cooperating with a driving member, and both the inlet channel (1111) and the outlet channel (1112) are in communication with the connection hole (117).

9. The knotless suture - carrying anchor according to any one of claims 1 - 8, characterized in that, Also included are auxiliary thread (2) and self-locking suture (3); The end (31) of one end of the self-locking suture (3) is confined within the fixing cavity (112), and the other end of the self-locking suture (3) extends from the outlet channel (1112); One end of the auxiliary wire (2) has a wire loop (21), and the other end extends into the wire inlet channel (1111) and extends from the wire outlet channel (1112).

10. A winding method for a suture - carrying knotless anchor, characterized in that, The knot-free anchor with a wire as claimed in any one of claims 1 to 9 comprises: Pass one end of the self-locking suture (3) away from the end (31) through the wire loop (21) in the auxiliary wire (2); Pull the end of the auxiliary wire (2) extending out of the wire outlet channel (1112) outwards, and the wire loop (21) enters the anchor body (1) until the auxiliary wire (2) is completely pulled out from the wire outlet channel (1112); Tighten one end of the self-locking suture (3) away from the end (31).

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