Wire Anchors and Wire Anchor Kits

Abstract

The present invention relates to a wire anchor and a wire anchor kit. The wire anchor comprises a nail body and a suture fixing part connected to the first end of the nail body, the nail body is in the shape of a spiral spring, the opening of the nail body is arranged toward the suture fixing part, and a suture is fixed on the suture fixing part. After the nail body enters the bone hole under the drive of an external wire anchor driver, the nail body is compressed and deformed along the radial direction of the nail body. The present invention sets the nail body of the wire anchor in the shape of a spiral spring, so that after the wire anchor enters the bone hole, the nail body is compressed and deformed along the radial direction of the nail body, which will not cause the diameter of the bone hole to expand, thereby applying elastic force to the inner wall of the bone hole, making it difficult for the wire anchor to loosen or fall out. At the same time, the gap between the spiral springs facilitates the growth of bones into the spiral springs, so that the wire anchor is better combined with the bone.

Description

Technical Field

[0001] The invention relates to the field of medical devices, and in particular to a wire anchor and a wire anchor kit. Background Art

[0002] Currently, wire anchors are commonly used in surgical operations to repair tendon ruptures throughout the body.

[0003] The wire anchor in the prior art is usually a solid nail body, such as the wire anchor disclosed in Chinese invention patent application CN109984784A, which has a thread on the outside of the solid nail body to facilitate the anchor to be fixed in a pre-drilled bone hole on the bone. The suture fixed on the solid nail body is passed through the soft tissue and tied to fix the soft tissue on the solid nail body, that is, on the bone surface, to achieve reconnection of the soft tissue and the bone.

[0004] However, the wire anchors including CN109984784A have the following three disadvantages: first, when the wire anchor enters the bone hole on the bone, in order to make the wire anchor fit tightly with the bone hole, the size of the wire anchor is usually slightly larger than the size of the bone hole. Therefore, the diameter of the bone hole will inevitably expand during the process of screwing the wire anchor into the bone hole. Second, since the outer dimensions of the wire anchor are fixed, it is difficult to fix tightly with the bone hole, which may cause the wire anchor to loosen or fall out. Third, the solid nail body is not convenient for the bone to grow into the wire anchor. Summary of the invention

[0005] In view of the problems existing in the above-mentioned prior art, the object of the present invention is to provide a wire anchor and a wire anchor kit, which can stably fix the wire anchor in the bone hole and facilitate bone ingrowth.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A wire anchor, used for use with a wire anchor driver, comprises a nail body and a suture fixing part connected to a first end of the nail body, the nail body is in the shape of a spiral spring, the opening of the nail body is arranged toward the suture fixing part, and a suture is fixed on the suture fixing part; after the nail body enters a bone hole under the drive of the wire anchor driver, the nail body is compressed and deformed along the radial direction of the nail body; the second end of the nail body is connected to an elastic locking part, and the elastic locking part is provided with a clearance area for the wire anchor driver to pass through; after the nail body and the elastic locking part enter the bone hole in turn, the nail body and the elastic locking part are both compressed and deformed, and the elastic force of the elastic locking part is greater than the elastic force of the nail body.

[0008] Furthermore, the suture fixing portion is a fixing rod, a first end of the fixing rod is connected to the nail body, and the fixing rod is provided with the suture that can slide on the fixing rod.

[0009] Furthermore, a limiting portion is provided at the second end of the fixing rod, and the limiting portion is used to limit the suture from leaving the fixing rod.

[0010] Furthermore, the elastic locking portion is an arc-shaped elastic member, and the arc radius of the arc-shaped elastic member is greater than the radius of a single circle in the nail body portion.

[0011] Furthermore, the fixing rod, the nail body and the arc-shaped elastic member are formed by bending an elastic columnar member.

[0012] Furthermore, one end of the arc-shaped elastic member is connected to the nail body, and the other end of the arc-shaped elastic member is a stop surface.

[0013] Furthermore, the radius of the single circle in the nail body gradually increases as it moves away from the suture fixing portion.

[0014] Furthermore, the limiting portion is a welding point, and the welding point protrudes along the radial direction of the fixing rod.

[0015] A wire anchor kit comprises a wire anchor driver and any of the above-mentioned wire anchors, wherein the wire anchor driver comprises a handle portion and a shaft, and the wire anchor driver is used in conjunction with the wire anchor, wherein the first end of the shaft is connected to the handle portion, and the second end of the shaft is provided with an anchor fixing portion that cooperates with the suture fixing portion; after the anchor fixing portion enters the spiral hollow portion of the nail body from the second end of the nail body, it cooperates with the suture fixing portion.

[0016] A wire anchor kit comprises a wire anchor driver and any of the above-mentioned wire anchors with the fixing rod, the wire anchor driver comprises a handle portion and a shaft, the wire anchor driver is used in conjunction with the wire anchor, the first end of the shaft is connected to the handle portion, the second end of the shaft is provided with an anchor fixing portion that matches the suture fixing portion; the anchor fixing portion enters the spiral hollow portion of the nail body from the second end of the nail body and then matches the suture fixing portion; the anchor fixing portion is a fixing groove that matches the fixing rod.

[0017] Compared with the prior art, the beneficial effect of the present invention is that: by setting the nail body of the wire anchor to be in the shape of a spiral spring, after the wire anchor enters the bone hole, the nail body is compressed and deformed in the radial direction of the nail body, thereby applying elastic force to the inner wall of the bone hole, making it difficult for the wire anchor to loosen or fall out. At the same time, the gap between the spiral springs facilitates the growth of bones into the spiral springs, that is, the bones are easy to grow into the wire anchor, so that the wire anchor and the bones are better combined. In addition, when the nail body enters the bone hole, the spiral spring will be compressed and deformed, so it will not cause the diameter of the bone hole to expand. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional diagram of a wire anchor of the present invention;

[0019] Figure 2 is a front view of the anchor with wire of the present invention;

[0020] Figure 3 It is a left side view of the anchor with wire of the present invention;

[0021] Figure 4 is a stereoscopic view of a wire anchor and a wire anchor driver of the present invention;

[0022] Figure 5 yes Figure 4 Enlarged schematic diagram of part A in the middle.

[0023] In the figure:

[0024] 1-nail body; 2-wire anchor driver; 2a-handle; 2b-axis; 3-fixing rod; 4-arc-shaped elastic member; 5-fixing groove. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] In order to solve the problem that the wire anchor may become loose or fall out after being fixed into the bone hole in the prior art, the present invention discloses a wire anchor kit, including a wire anchor and a wire anchor driver 2, wherein the wire anchor is used in conjunction with the wire anchor driver 2. Figures 1 to 5 As shown, the anchor with wire includes a nail body 1 and a suture fixing part connected to the first end of the nail body 1. The nail body 1 is in the shape of a spiral spring, and a gap is provided between each coil of the spiral spring. The opening of the nail body 1 is arranged toward the suture fixing part, and a suture is fixed on the suture fixing part. After the nail body 1 enters the bone hole under the drive of the anchor with wire driver 2, the nail body 1 is compressed and deformed in the radial direction of the nail body 1. The anchor with wire driver of the present invention, such as Figure 4 and Figure 5 As shown, the anchor driver 2 with a wire includes a handle portion 2a and a shaft 2b, wherein the first end of the shaft 2b is connected to the handle portion 2a, and the second end of the shaft 2b is provided with an anchor fixing portion that cooperates with the suture fixing portion. After the anchor fixing portion enters the spiral hollow portion of the nail body portion 1 from the second end of the nail body portion 1, it cooperates with the suture fixing portion. The opening of the nail body portion 1 is arranged toward the suture fixing portion, so that the anchor driver 2 with a wire can cooperate with the suture fixing portion after passing through the hollow portion of the spiral spring; the hollow portion of the spiral spring is a cylinder, and if the cylinder continues to extend along the axis direction of the cylinder, the suture fixing portion is on the extension path.

[0029] The steps for using the wire anchor and the wire anchor driver of the present invention are as follows:

[0030] S1, drilling a bone hole in the patient's bone at the site where surgery is required;

[0031] S2, inserting the shaft 2b of the anchor driver with thread into the spiral hollow part of the nail body 1, so that the suture fixing part cooperates with the anchor fixing part; at this time, the spiral springs in the nail body 1 are wound around the outside of the shaft 2b;

[0032] S3, holding the handle 2a, aligning the suture fixing portion with the bone hole, and making the axis of the nail body 1 and the axis of the bone hole in the same straight line direction;

[0033] S4, the nail body 1 enters the bone hole toward the outermost single-turn spring at one end of the suture fixing portion, and then drives the handle 2a to move toward the bone hole, and rotates the handle 2a to screw the nail body 1 into the bone hole, and the nail body 1 is compressed and deformed in the radial direction of the nail body 1;

[0034] S5, passing the suture fixed on the suture fixing part through the soft tissue, and tying a knot to fix the soft tissue on the suture fixing part, that is, on the bone surface, to achieve reconnection of the soft tissue and the bone.

[0035] The wire anchor of the present invention is configured such that the nail body 1 of the wire anchor is in the shape of a coil spring, so that after the wire anchor enters the bone hole, the coil spring is compressed and deformed in the radial direction of the coil spring, thereby applying elastic force to the inner wall of the bone hole, making it difficult for the wire anchor to loosen or fall out of the bone hole. At the same time, the gap between the coil springs facilitates the growth of bones into the coil springs, that is, the bones are easy to grow into the wire anchor, so that the wire anchor is better combined with the bones. In addition, when the nail body 1 enters the bone hole, the coil spring is compressed and deformed, so that the diameter of the bone hole will not be enlarged.

[0036] In this embodiment, Figures 1 to 3 As shown, the second end of the nail body 1 is connected to an elastic locking portion, and the elastic locking portion is provided with a clearance area for the wire anchor driver 2 to pass through. In the process of the wire anchor entering the bone hole, the nail body 1 and the elastic locking portion enter the bone hole in sequence. After the nail body 1 and the elastic locking portion both enter the bone hole, the nail body 1 and the elastic locking portion are both compressed and deformed, and the elastic force of the elastic locking portion is greater than the elastic force of the nail body 1. The present invention, through the provision of the elastic locking portion, relies on the elastic locking portion to apply a larger elastic force to the inner wall of the bone hole in the bone hole, thereby further firmly fixing the wire anchor in the bone hole. In other embodiments, other methods may also be used to further enhance the fixation of the wire anchor to the bone hole. For example, the suture fixing part may include a retractable fixing claw, and before the nail body 1 enters the bone hole, the fixing claw is in a retracted state, and after the nail body 1 enters the bone hole and is compressed and deformed, the fixing claw is driven to be in an extended state, and at this time, the fixing claw abuts against the inner wall of the bone hole. For another example, after the nail body 1 enters the bone hole, a titanium alloy plate may be set to close the opening of the bone hole, and the titanium alloy plate may be provided with a threading hole for the suture to pass through.

[0037] In this embodiment, Figures 1 to 5As shown, the suture fixing portion is a fixing rod 3, the first end of which is connected to the nail body portion 1, and the fixing rod 3 is provided with the suture that can slide on the fixing rod 3. Corresponding to the fixing rod 3, the anchor fixing portion is a fixing groove 5 that cooperates with the fixing rod 3. The present invention simplifies the structure of the suture fixing portion by setting the suture fixing portion to be rod-shaped, thereby effectively reducing the manufacturing cost of the anchor with wire. In other embodiments, the shape of the suture fixing portion can also be set to other shapes. For example, in order to facilitate the nail body portion 1 to enter the bone hole, the suture fixing portion can be set to a cone shape. For another example, in order to facilitate the stable cooperation between the suture fixing portion and the anchor fixing portion, the suture fixing portion can be set to a cross shape.

[0038] In this embodiment, if Figure 1 As shown, a limiting portion is provided at the second end of the fixing rod 3, and the limiting portion is used to limit the suture from leaving the fixing rod 3. The present invention allows the suture to slide on the fixing rod 3 without sliding out of the fixing rod 3 through the setting of the limiting portion. In other embodiments, the suture may not slide on the fixing rod 3, so the limiting portion may not be provided.

[0039] In this embodiment, the limiting portion is a welding spot, and the welding spot protrudes along the radial direction of the fixing rod. One end of the suture is looped and sleeved on the fixing rod 3. A gap is provided between the looped suture and the side wall of the fixing rod 3, so that the looped suture can slide on the fixing rod 3. When spot welding the welding spot, the welding spot can be spot welded on the side wall of the fixing rod 3, and the height of the welding spot protruding relative to the side wall of the fixing rod 3 is greater than the gap between the looped suture and the side wall of the fixing rod 3, so as to limit the looped suture from leaving the fixing rod 3. The present invention sets the limiting portion by spot welding, which is simple to operate and convenient for the production of the anchor with wire. In other embodiments, a limiting rod can also be set at the second end of the fixing rod 3, and the limiting rod is set parallel to the radial cross section of the fixing rod 3, and the length of the limiting rod is greater than the diameter of the fixing rod 3. A limiting ring can also be sleeved on the second end of the fixing rod 3.

[0040] In this embodiment, if Figures 1 to 3As shown, the elastic locking portion is an arc-shaped elastic member 4, and the arc radius of the arc-shaped elastic member 4 is greater than the radius of a single circle in the nail body 1. In the arc-shaped elastic member 4, the area between the arc center and the arc-shaped elastic member 4 is equivalent to a clearance area provided on the elastic locking portion for the wire anchor driver 2 to pass through. By adopting the arc-shaped elastic member 4 as the elastic locking portion, the present invention makes the arc-shaped elastic member 4 simple in structure and easy to produce. In other embodiments, the elastic locking portion can also be an elastic ring with a diameter greater than the diameter of the bone hole. When the nail body 1 enters the bone hole, the elastic ring can be squeezed into the bone hole by an external instrument.

[0041] In this embodiment, if Figures 1 to 3 As shown, the fixing rod 3, the nail body 1 and the arc-shaped elastic member 4 are formed by bending an elastic columnar member. Therefore, the fixing rod 3 and other components in the wire anchor are not easy to scatter and fall off. In other embodiments, since the fixing rod 3, the nail body 1 and the arc-shaped elastic member 4 are bent out of an elastic columnar member, the production equipment is relatively complicated, and the fixing rod 3, the nail body 1 and the arc-shaped elastic member 4 can also be processed separately, and finally the fixing rod 3, the nail body 1 and the arc-shaped elastic member 4 are welded and connected.

[0042] In the present embodiment, the nail body 1 and the circular arc-shaped elastic member 4 are both spiral, the spiral directions of the nail body 1 and the circular arc-shaped elastic member 4 are the same, and the nail body 1 and the circular arc-shaped elastic member 4 are continuously and smoothly connected. Therefore, when the wire anchor is fixed into the bone hole, the handle 2a is rotated to drive the nail body 1 to rotate, so that the nail body 1 is first screwed into the bone hole, and then the circular arc-shaped elastic member 4 is also screwed into the bone hole. The present invention facilitates the screwing of the wire anchor into the bone hole during surgery by setting the nail body 1 and the circular arc-shaped elastic member 4 to be continuously and smoothly connected. In other embodiments, if limited by processing capacity, the nail body 1 and the circular arc-shaped elastic member 4 may not be smoothly connected, but in the process of fixing the circular arc-shaped elastic member 4 into the bone hole, it is necessary to use external instruments to squeeze the circular arc-shaped elastic member 4 into the bone hole.

[0043] In this embodiment, if Figures 1 to 3As shown, one end of the arc-shaped elastic member 4 is connected to the nail body 1, and the other end of the arc-shaped elastic member 4 is a check surface, and the check surface is a plane. According to the present invention, after the arc-shaped elastic member 4 enters the bone hole, the arc-shaped elastic member 4 can only rotate in one direction through the setting of the check surface. Once the arc-shaped elastic member 4 is rotated in the direction of rotating out of the bone hole, the check surface is equivalent to the inner wall of the bone hole being scraped, and the resistance is large, making it difficult to rotate the arc-shaped elastic member 4 out of the bone hole, thereby firmly fixing the wire anchor in the bone hole. In other embodiments, the other end of the arc-shaped elastic member 4 may also be provided with a check member to replace the check surface. In other embodiments, a locking nail may also be provided at the other end of the arc-shaped elastic member 4. When the arc-shaped elastic member 4 enters the bone hole and rotates into place, the locking nail is nailed to the inner wall of the bone hole.

[0044] In this embodiment, the radius of the single circle in the nail body 1 gradually increases as it moves away from the suture fixing part, that is, the nail body 1 has a taper, and the taper angle of the nail body 1 is set toward the fixing rod 3. During the operation, a bone hole with a taper is first chiseled, and the opening diameter of the bone hole is larger than the diameter of the outermost single-turn spring of the nail body 1 toward one end of the fixing rod 3. Therefore, the outermost single-turn spring of the nail body 1 toward one end of the fixing rod 3 can enter the bone hole without being squeezed. The present invention facilitates surgical operation by setting the nail body 1 to have a taper. In other embodiments, the nail body 1 can also be cylindrical, and the cylindrical nail body 1 usually corresponds to a cylindrical bone hole. The connection between the nail body 1 and the arc-shaped elastic member 4 is continuously and smoothly connected, and the connection between the nail body 1 and the arc-shaped elastic member 4 is a spiral with a taper, and the taper angle of the connection between the nail body 1 and the arc-shaped elastic member 4 is toward the nail body 1. Since the shape of the connection between the nail body 1 and the arc-shaped elastic member 4 is limited, the arc-shaped elastic member 4 can be rotated along with the wire anchor driver 2 to enter the bone hole.

[0045] In summary, the wire anchor of the present invention is configured such that the body 1 of the wire anchor is in the shape of a spiral spring, so that after the wire anchor enters the bone hole, the spiral spring is compressed and deformed along the radial direction of the spiral spring, thereby applying elastic force to the inner wall of the bone hole, so that the wire anchor is not easy to loosen or fall out of the bone hole. At the same time, the gap between the spiral springs facilitates the growth of bones into the spiral springs, that is, the bones are easy to grow into the wire anchor, so that the wire anchor is better combined with the bones. In addition, when the body 1 enters the bone hole, the spiral spring will be compressed and deformed, so that the diameter of the bone hole will not be enlarged. And through the setting of the elastic locking part, relying on the elastic locking part to apply a large elastic force to the inner wall of the bone hole in the bone hole, the wire anchor is further firmly fixed in the bone hole. And by configuring the suture fixing part to be rod-shaped, the structure of the suture fixing part is simplified, and the manufacturing cost of the wire anchor is effectively reduced. And through the setting of the limiting part, the suture can slide on the fixing rod 3 while not sliding out of the fixing rod 3. The limiting part is set by spot welding, which is easy to operate and convenient for the production of the anchor with wire. The arc-shaped elastic part 4 is used as the elastic locking part, so that the arc-shaped elastic part 4 has a simple structure and is easy to produce. The fixing rod 3, the nail body 1 and the arc-shaped elastic part 4 are bent by an elastic columnar part, so that the fixing rod 3 and other parts in the anchor with wire are not easy to scatter and fall. The nail body 1 and the arc-shaped elastic part 4 are connected continuously and smoothly, which is convenient for the anchor with wire to be screwed into the bone hole during surgery. Through the setting of the check surface, once the arc-shaped elastic part 4 is rotated in the direction of rotating out of the bone hole, the check surface is equivalent to the inner wall of the scraping hole, and the resistance is large, making it difficult to rotate the arc-shaped elastic part 4 out of the bone hole. The nail body 1 is set to have a taper, which is convenient for surgical operation.

[0046] It should be emphasized that the above are only preferred embodiments of the present invention and do not limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A wire anchor, used in conjunction with a wire anchor driver (2), characterized in that: The invention comprises a nail body (1) and a suture fixing part connected to a first end of the nail body (1), characterized in that the suture fixing part is a fixing rod (3), the nail body (1) is in the shape of a spiral spring, the opening of the nail body (1) is arranged toward the fixing rod (3), and a suture is fixed on the fixing rod (3); after the nail body (1) enters the bone hole under the drive of the wire anchor driver (2), the nail body (1) is compressed and deformed in the radial direction of the nail body (1); the second end of the nail body (1) is connected to an elastic locking part, the elastic locking part is an arc-shaped elastic member (4), and the arc-shaped elastic member (5) is connected to the second end of the nail body (1), and the elastic locking part is an arc-shaped elastic member (4). The member (4) is provided with a clearance area for the wire anchor driver (2) to pass through; the fixing rod (3), the nail body (1) and the arc-shaped elastic member (4) are formed by bending an elastic columnar member; after the nail body (1) and the arc-shaped elastic member (4) successively enter the bone hole, the nail body (1) and the arc-shaped elastic member (4) are both compressed and deformed, and the elastic force of the arc-shaped elastic member (4) is greater than the elastic force of the nail body (1); after the wire anchor driver (2) enters the spiral hollow portion of the nail body (1) from the second end of the nail body (1), it cooperates with the fixing rod (3).

2. The wire anchor according to claim 1, characterized in that: The first end of the fixing rod (3) is connected to the nail body (1), and the fixing rod (3) is provided with the suture which can slide on the fixing rod (3).

3. The belt line anchor according to claim 2, characterized in that: The second end of the fixing rod (3) is provided with a limiting portion, and the limiting portion is used to limit the suture from leaving the fixing rod (3).

4. The belt line anchor according to claim 1, characterized in that: The arc radius of the arc-shaped elastic member (4) is greater than the radius of a single circle in the nail body (1).

5. The belt line anchor according to claim 4, characterized in that: One end of the circular arc-shaped elastic member (4) is connected to the nail body (1), and the other end of the circular arc-shaped elastic member (4) is a stop surface.

6. The belt line anchor according to claim 1, characterized in that: The radius of a single circle in the nail body (1) gradually increases as it moves away from the suture fixing portion.

7. The belt line anchor according to claim 3, characterized in that: The limiting portion is a welding point, and the welding point protrudes along the radial direction of the fixing rod (3).

8. A wire anchor kit, characterized in that: The invention comprises a wire anchor driver (2) and the wire anchor as claimed in any one of claims 1 to 7, wherein the wire anchor driver comprises a handle portion (2a) and a shaft (2b), the wire anchor driver (2) is used in conjunction with the wire anchor, the first end of the shaft (2b) is connected to the handle portion (2a), the second end of the shaft (2b) is provided with an anchor fixing portion that matches the fixing rod (3); the anchor fixing portion enters the spiral hollow portion of the nail body (1) from the second end of the nail body (1) and then matches the fixing rod (3); the anchor fixing portion is a fixing groove (5) that matches the fixing rod (3).

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