CN221083697U - Knot-free fixed anchor - Google Patents

Abstract

The present application relates to a knot-free fixing anchor, which belongs to the field of medical device technology. The knot-free fixing anchor includes a nail body and a nail head. The nail body is provided with a first hole that passes through itself, and the nail body is sleeved on the inserter; the nail head is connected to the other end of the inserter, including a hollow part and two pressing parts, the hollow part is provided with a second hole that passes through itself, the two pressing parts are arranged opposite to each other along a first direction, and the pressing parts are arranged on the side of the hollow part away from the nail body; the second hole is used for the positioning needle to pass through, and the two pressing parts form a positioning area, and the suture passes through the positioning area. The knot-free fixing anchor provided in the embodiment of the present application can reduce the risk of directional deviation when the anchor is implanted into the bone tunnel, and reduce the difficulty of fixing the suture.

Description

Knot-free anchor

Technical Field

The present application relates to the field of medical device technology, and in particular to a knot-free fixation anchor.

Background technique

Knotless anchors are commonly used implant devices in sports medicine orthopedic surgery. They are used to fix soft tissue separated from human bones to human bones. They are usually used in repair surgeries for soft tissue avulsion or tearing of bony structures. During the operation, the anchor carries the suture and is placed into the bone canal through an inserter. The anchor is fixedly connected to the bone, thereby fixing the middle part of the suture to the bone. After the two ends of the suture are connected to the soft tissue, they are passed through the threading hole of another knotless anchor and further fixed to the human bone. When the existing knotless anchors are placed into the bone canal, medical staff generally confirm the extension direction of the bone canal through observation, and then place the anchor into the bone canal. During the implantation process of the anchor, the direction of the anchor is easy to deviate from the direction of the bone canal, and the anchor is difficult to accurately enter the bone canal, resulting in high difficulty in fixing the suture.

Utility Model Content

The purpose of the present application is to provide a knot-free fixation anchor to address the above-mentioned problems, which can reduce the risk of directional deviation when the anchor is implanted into the bone tunnel, reduce the difficulty of suture fixation, and improve the above-mentioned problems.

The present application provides a knot-free fixing anchor, which includes a nail body and a nail head. The nail body is provided with a first hole penetrating through the nail body, and the nail body is sleeved on an inserter; the nail head is connected to the other end of the inserter, and includes a hollow portion and two wire-pressing portions, the hollow portion is provided with a second hole penetrating through the nail body, the two wire-pressing portions are arranged opposite to each other along a first direction, and the wire-pressing portions are arranged on a side of the hollow portion away from the nail body; the second hole is used for a positioning needle to pass through, and the two wire-pressing portions surround a positioning area, and a suture passes through the positioning area.

In the technical solution of the embodiment of the present application, when the knotless fixing anchor provided by the embodiment of the present application is used during surgery, the operator can first pass the positioning pin through the second hole and extend it from the end of the nail head away from the nail body, insert the part of the positioning pin extending from the second hole into the bone canal first, make the length direction of the positioning pin and the length direction of the bone canal approach parallel, and then push the inserter to move the knotless fixing anchor along the positioning pin to enter the bone canal, and then fix the nail body to the bone canal, pull out the positioning pin, remove the inserter, and the positioning pin limits the direction of the knotless fixing anchor entering the bone canal, reducing the risk of directional deviation of the punch-free fixing anchor when entering the bone canal, so that the punch-free fixing anchor can enter the bone canal more accurately, reducing the difficulty of implanting the knotless fixing anchor; the suture passes through the positioning area, and when the anchor is implanted into the bone canal, the anchor brings the middle part of the suture into the bone canal, and the two ends of the suture are located on the outside of the bone canal. After connecting the soft tissue, it is fixed to the bone by other means (such as a knotless fixing anchor). Since the difficulty of implanting the knotless fixing anchor is reduced, the difficulty of fixing the suture is also reduced.

In some embodiments, the hollow portion is located between the two wire-pressing portions, and the wire-pressing portion includes a first section and a second section, the first section is connected to the hollow portion, and the second section is connected to the first section from one end to the other end of the second section, and the spacing size of the second sections of the two wire-pressing portions in the first direction gradually decreases.

In the technical solution of the embodiment of the present application, from one end of the second section connected to the first section to the other end of the second section, the spacing size of the second sections of the two pressing parts in the first direction gradually decreases, and the second section is inclined. On the one hand, when the nail head enters the bone canal, even if the nail head fails to align with the opening of the bone canal, when the second section of any of the two pressing parts of the opening of the bone canal contacts the surface away from the other pressing part, the knotless fixing anchor can be synchronously displaced in the first direction and the length direction of the nail body under the guidance of the second section, thereby entering the bone canal and reducing the difficulty of the nail head entering the bone canal; on the other hand, the second section can block the suture from moving toward the direction of escaping from the positioning area, thereby reducing the risk of the suture escaping from the punch-free fixing anchor.

In some embodiments, a surface of any one of the two pressing portions facing the other pressing portion is arc-shaped.

In the technical solution of the embodiment of the present application, the surface of any one of the two thread pressing parts facing the other thread pressing part is arc-shaped, so that the surface of the thread pressing part in contact with the suture is relatively smooth. When the risk abuts against the thread pressing part, the thread pressing part can apply force to the risk evenly through the smooth contact surface, thereby reducing the risk of suture breakage due to stress concentration.

In some embodiments, the hollow portion includes a main body section and a connecting section, the connecting section is threadedly connected to the inserter, the main body section is connected to the wire pressing portion, the second hole passes through the main body section and the connecting section, and the second hole is connected to the positioning area.

In some embodiments, an outer wall of the connecting section is provided with an external thread, and the connecting section extends into the inserter and is threadedly connected to an inner wall of the inserter.

In the technical solution of the embodiment of the present application, the outer wall of the connecting section is provided with an external thread, and the inner wall of the inserter close to the nail head is provided with an internal thread for connecting with the connecting section. The connecting section extends into the inner side of the inserter and is threadedly connected to the inner wall of the inserter. The structure is simple and the connection is stable.

In some embodiments, the hollow portion further includes a protrusion, which protrudes from the surface of the main section away from the connecting section. In the first direction, the protrusion is located between the two pressing portions, and the position of the protrusion corresponds to the position of the second hole, and the protrusion extends into the positioning area.

In the technical solution of the embodiment of the present application, in the first direction, the suture is located between the protrusion and the thread pressing portion, and the position of the protrusion corresponds to the position of the second hole. Under the cover of the protrusion, the suture in the positioning area avoids the connecting position between the second hole and the positioning area, so that the positioning needle can pass through the second hole.

In some embodiments, the number of the protrusions is two, and the two protrusions are arranged opposite to each other along a second direction, and the second direction is perpendicular to the first direction.

In the technical solution of the embodiment of the present application, there are two protrusions, and the two protrusions provide two limiting fulcrums for the suture in the positioning area, thereby limiting the positions of the two ends of the suture in the positioning area, so that the protrusions have a higher effect on limiting the position of the suture.

In some embodiments, the first hole is a hexagonal hole, and the first hole is adapted to the outer surface of the inserter in a hexagonal column shape.

In the technical solution of the embodiment of the present application, the outer surface of the inserter is in the shape of a hexagonal column, the first hole is a hexagonal hole, the inserter is adapted to pass through the first hole, the inserter limits the rotation of the nail body, and when the inserter is removed, the inserter can be quickly pulled out of the nail body that has been fixed in the bone canal.

Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic diagram of the structure of an inserter provided in some embodiments of the present application;

FIG2 is a schematic diagram of the structure of a nail head provided in some embodiments of the present application;

FIG3 is a top view of a nail head provided in some embodiments of the present application;

Fig. 4 is a cross-sectional view of the A-A position in Fig. 3;

FIG5 is a schematic diagram of the structure of a nail head provided in some other embodiments of the present application;

FIG. 6 is a front view of a nail head provided in some other embodiments of the present application.

Icon: 1-inserter, 2-suture, 3-positioning needle, 4-knot-free fixing anchor, 41-nail body, 42-nail head, 420-second hole, 421-hollow part, 4210-main section, 4211-connecting section, 4212-protrusion, 422-wire pressing part, 4220-first section, 4221-second section, 423-positioning area, X-first direction, Y-second direction.

Detailed ways

In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

The term "and/or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/" in this application generally indicates that the associated objects before and after are in an "or" relationship.

The term "multiple" as used in the present application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

According to some embodiments of the present application, as shown in Figures 1 to 4, the present application provides a knot-free fixing anchor 4, which includes a nail body 41 and a nail head 42. The nail body 41 is provided with a first hole penetrating through itself, and the nail body 41 is sleeved on the inserter 1; the nail head 42 is connected to the other end of the inserter 1, and includes a hollow portion 421 and two wire-pressing portions 422, the hollow portion 421 is provided with a second hole 420 penetrating through itself, the two wire-pressing portions 422 are arranged opposite to each other along the first direction X, and the wire-pressing portions 422 are arranged on the side of the hollow portion 421 away from the nail body 41; the second hole 420 is used for the positioning needle 3 to pass through, and the two wire-pressing portions 422 surround a positioning area 423, and the suture 2 passes through the positioning area 423.

The nail body 41 can be a screw-in type or a knock-in type.

When the nail body 41 is of a screw-in type, an outer peripheral surface of the nail body 41 close to the connection with the inserter 1 is provided with an external thread, and at the same time, an inner wall of the opening of the patient's bone canal is provided with an internal thread for connecting with the nail body 41.

The X direction shown in the figure is the first direction X.

The Y direction shown in the figure is the second direction Y.

The second hole 420 extends along the length direction of the nail body 41 .

The second hole 420 may be a circular hole; or, the second hole 420 may be an elliptical hole.

The suture 2 passes through the positioning area 423 along the second direction Y.

The diameter of the second hole 420 may be larger than the diameter of the positioning pin 3 .

The inner wall of the second hole 420 can be slidably matched with the outer peripheral surface of the positioning pin 3.

Bone tunnels are blind holes pre-drilled in the bone for implanting anchors.

When the knot-free fixing anchor 4 provided by the embodiment of the present application is used during surgery, the operator can first insert the positioning pin 3 through the second hole 420 and extend it from the end of the nail head 42 away from the nail body 41, insert the portion of the positioning pin 3 extending from the second hole 420 into the bone canal first, make the length direction of the positioning pin 3 and the length direction of the bone canal approach parallel, then push the inserter 1 to move the knot-free fixing anchor 4 along the positioning pin 3 to enter the bone canal, then fix the nail body 41 to the bone canal, pull out the positioning pin 3, remove the inserter 1, and the positioning pin 3 limits the knot-free fixing anchor The direction of the nail 4 entering the bone canal reduces the risk of directional deviation when the punch-free fixation anchor enters the bone canal, so that the punch-free fixation anchor can enter the bone canal more accurately, reducing the difficulty of implanting the knot-free fixation anchor 4; the suture 2 passes through the positioning area 423, and when the anchor is implanted in the bone canal, the anchor brings the middle part of the suture 2 into the bone canal, and the two ends of the suture 2 are located on the outside of the bone canal. After connecting the soft tissue, it is fixed to the bone by other means (such as the knot-free fixation anchor 4). Since the difficulty of implanting the knot-free fixation anchor 4 is reduced, the difficulty of fixing the suture 2 is also reduced.

Optionally, as shown in Figures 2 and 4 to 6, the hollow portion 421 is located between the two wire-pressing portions 422, the wire-pressing portion 422 includes a first section 4220 and a second section 4221, the first section 4220 is connected to the hollow portion 421, and the second section 4221 is connected to the first section 4220 from one end to the other end of the second section 4221, and the spacing dimensions of the second sections 4221 of the two wire-pressing portions 422 in the first direction X gradually decrease.

When the positioning needle 3 passes through the second hole 420, in the first direction X, the suture 2 is located between the portion of the positioning needle 3 extending out of the second hole 420 and the thread pressing portion 422; when there are multiple sutures 2, a portion of the multiple sutures 2 is located between the positioning needle 3 and one of the two thread pressing portions 422, and another portion of the multiple sutures 2 is located between the positioning needle 3 and the other of the two thread pressing portions 422.

When the positioning needle 3 passes through the second hole 420, the end of the second section 4221 away from the first section 4220 can contact the positioning needle 3, so that the first section 4220, the second section 4221, the hollow part 421 and the positioning needle 3 surround the suture 2, reducing the risk of the suture 2 detaching from the positioning area 423.

From one end of the second section 4221 connected to the first section 4220 to the other end of the second section 4221, the spacing size of the second sections 4221 of the two pressing parts 422 in the first direction X gradually decreases, and the second section 4221 is inclined. On the one hand, when the nail head 42 enters the bone canal, even in the case that the nail head 42 fails to align with the opening of the bone canal, when the second section 4221 of any of the two pressing parts 422 of the opening of the bone canal contacts the surface away from the other pressing part 422, the knot-free fixing anchor 4 can be synchronously displaced in the first direction X and the length direction of the nail body 41 under the guidance of the second section 4221, thereby entering the bone canal and reducing the difficulty of the nail head 42 entering the bone canal; on the other hand, the second section 4221 can block the suture 2 from moving toward the direction of escaping from the positioning area 423, thereby reducing the risk of the suture 2 escaping from the punch-free fixing anchor.

Optionally, as shown in FIG. 2 and FIG. 4 , a surface of any one of the two wire pressing portions 422 facing the other wire pressing portion 422 is arc-shaped.

The surface of any one of the two pressing parts 422 facing the other pressing part 422 is arc-shaped, so that the surface of the pressing part 422 in contact with the suture 2 is relatively smooth. When the risk abuts against the pressing part 422, the pressing part 422 can apply force to the risk evenly through the smooth contact surface, thereby reducing the risk of the suture 2 breaking due to stress concentration.

In some embodiments, the surface of the pressing portion 422 away from the nail body 41 is arc-shaped, so that the end of the pressing portion 422 away from the nail body 41 is smoother, reducing the risk of the pressing portion 422 scratching or piercing and causing injury to the operator or patient.

Optionally, as shown in Figures 2 to 6, the hollow portion 421 includes a main body section 4210 and a connecting section 4211, the connecting section 4211 is threadedly connected to the inserter 1, the main body section 4210 is connected to the wire pressing portion 422, the second hole 420 passes through the main body section 4210 and the connecting section 4211, and the second hole 420 is connected to the positioning area 423.

The main body section 4210 and the wire pressing portion 422 may be integrally formed; or, the main body section 4210 and the wire pressing portion 422 may be welded and connected.

Optionally, as shown in FIGS. 2 to 6 , the outer wall of the connecting section 4211 is provided with an external thread, and the connecting section 4211 extends into the inserter 1 and is threadedly connected to the inner wall of the inserter 1 .

The outer wall of the connecting section 4211 is provided with an external thread, and the inner wall of the inserter 1 close to the nail head 42 is provided with an internal thread for connecting with the connecting section 4211. The connecting section 4211 extends into the inner side of the inserter and is threadedly connected to the inner wall of the inserter 1. The structure is simple and the connection is stable.

Optionally, as shown in Figures 5 and 6, the hollow portion 421 also includes a protrusion 4212, which protrudes from the surface of the main section 4210 away from the connecting section 4211. In the first direction X, the protrusion 4212 is located between the two pressing portions 422, and the position of the protrusion 4212 corresponds to the position of the second hole 420, and the protrusion 4212 extends into the positioning area 423.

In the length direction of the nail body 41 , the protrusion 4212 does not exceed the pressing line portion 422 .

The protrusion 4212 protrudes from the surface of the main section 4210 away from the nail body 41 along the length direction of the nail body 41 .

In the first direction X, the suture 2 is located between the protrusion 4212 and the thread pressing portion 422. The position of the protrusion 4212 corresponds to the position of the second hole 420. Under the cover of the protrusion 4212, the suture 2 in the positioning area 423 avoids the connection position between the second hole 420 and the positioning area 423, so that the positioning needle 3 can pass through the second hole 420.

Optionally, as shown in FIGS. 5 and 6 , the number of the protrusions 4212 is two, and the two protrusions 4212 are arranged opposite to each other along the second direction Y, and the second direction Y is perpendicular to the first direction X.

The two protrusions 4212 are respectively disposed on two sides of the second hole 420 .

There are two protrusions 4212 , and the two protrusions 4212 provide two limiting fulcrums for the suture 2 in the positioning area 423 , limiting the positions of the two ends of the suture 2 in the positioning area 423 , so that the protrusions 4212 have a higher effect of limiting the position of the suture 2 .

Optionally, the first hole is a hexagonal hole, and the first hole is adapted to the outer surface of the inserter 1 in the shape of a hexagonal column.

The outer surface of the inserter 1 is in the shape of a hexagonal column, and the first hole is a hexagonal hole. The inserter 1 fits through the first hole. The inserter 1 limits the rotation of the nail body 41. When the inserter 1 is removed, the inserter 1 can be quickly pulled out from the nail body 41 that has been fixed in the bone canal.

Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (8)

1. A tie-free anchor comprising:

the nail body is provided with a first hole penetrating through the nail body, and the nail body is sleeved on the inserter;

The pin head is connected to the other end of the inserter and comprises a hollow part and two wire pressing parts, the hollow part is provided with a second hole penetrating through the pin head, the two wire pressing parts are oppositely arranged along a first direction, and the wire pressing parts are arranged on one side, away from the pin body, of the hollow part;

The second hole is used for allowing the positioning needle to pass through, the two line pressing parts enclose a positioning area, and the suture passes through the positioning area.

2. The knotless fixation anchor of claim 1, wherein the hollow portion is located between two of the wire pressing portions, the wire pressing portions comprise a first section and a second section, the first section is connected with the hollow portion, one end of the second section connected with the first section is to the other end of the second section, and the second sections of the two wire pressing portions are gradually reduced in the interval dimension in the first direction.

3. The knotless fixation anchor of claim 1 wherein the surface of either of the two crimp portions facing the other crimp portion is arcuate.

4. The knotless fixation anchor of claim 1, wherein the hollow portion comprises a body section and a connection section, the connection section is threadably coupled to the inserter, the body section is coupled to the wire-pressing portion, the second hole extends through the body section and the connection section, and the second hole communicates with the location area.

5. The knotless fixation anchor of claim 4, wherein the outer wall of the connection section is provided with external threads, the connection section extending into the inserter and being threadably coupled to the inner wall of the inserter.

6. The tie-free anchor of claim 4, wherein the hollow portion further comprises a protrusion protruding from a surface of the main body section facing away from the connecting section, the protrusion being located between the two wire pressing portions in the first direction, and the protrusion being located at a position corresponding to the position of the second hole, the protrusion extending into the positioning region.

7. The knotless fixation anchor of claim 6, wherein the number of protrusions is two, the two protrusions being disposed opposite one another along a second direction, the second direction being perpendicular to the first direction.

8. The knotless fixation anchor of claim 1, wherein the first aperture is a hexagonal aperture that mates with an outer surface of the inserter that is hexagonal.