Multifunctional fixation device that can be used for tendon suturing and fracture fixation at the same time

Abstract

The present invention provides a multifunctional fixing device that can be used for tendon suturing and fracture fixation at the same time, including a nail body, a handle rod, a connector and a suture, wherein the nail body is provided with a head and a tail, the tail is provided with a connecting structure, the head is provided with a tightening structure, and a hole radially penetrating the nail body is formed on the nail body; the handle rod is provided with a head and a tail, and the tail is connected to the head of the nail body through a weak structure, so that the handle rod can be disconnected from the nail body at the weak structure; the connector is connected to the connecting structure at the tail of the nail body to be in a connected state, so that in the connected state, the connector and the tightening structure can be clamped on both sides of the cortical bone; the suture passes through the hole. According to the present invention, the problem of loose fixation caused by cancellous bone is avoided, tendon suturing and fracture fixation can be achieved simultaneously, and the surgical operation is convenient.

Description

Technical Field

[0001] The invention relates to the field of vascular surgery, and in particular to a multifunctional fixing device which can be used for tendon suturing and fracture fixing at the same time. Background Art

[0002] Tendon suturing and fracture fixation are both conventional surgical procedures. Tendon suturing generally uses a wire anchor screwed into a preset hole in the bone joint, and the tendon is tightened and sutured by passing the suture through the anchor. Fracture fixation generally uses a bone screw screwed into the bone from the fracture site, thereby fastening the bone parts on both sides of the fracture site together. However, for some complex surgical injuries, fracture injuries also occur at the site of tendon rupture. Using the wire anchors and bone screws of the prior art for surgical treatment at the same time is likely to cause mutual interference and the surgical operation cannot be completed normally. In addition, the force-bearing connection point of the wire anchors and bone screws of the prior art in the bone occurs in the cancellous bone. Due to the low strength of the cancellous bone and the different cancellous bone densities of different types of people, the connection strength of the wire anchors and bone screws to the bones is insufficient, which easily leads to loose connection problems. Summary of the invention

[0003] The invention provides a multifunctional fixing device which can be used for tendon suturing and fracture fixing at the same time.

[0004] Specifically, the present invention is achieved through the following technical solutions:

[0005] The embodiment of the present invention provides a multifunctional fixation device that can be used for tendon suturing and fracture fixation at the same time, comprising:

[0006] The nail body is provided with a head portion close to the operator and a tail portion far away from the operator when in use, the tail portion is provided with a connecting structure, the head portion is provided with a tightening structure, and a hole radially penetrating the nail body is formed on the nail body;

[0007] The handle rod is provided with a head portion close to the operator and a tail portion away from the operator when in use, and the tail portion is connected to the head portion of the nail body through a weak structure, so that the handle rod can be disconnected from the nail body at the weak structure;

[0008] A connecting piece is connected to the connecting structure at the tail of the nail body to be in a connected state, so that in the connected state, the connecting piece and the abutting structure can be clamped on both sides of the cortical bone;

[0009] A suture is passed through the hole.

[0010] In some embodiments, the connection structure is a thread formed on the outer periphery of the tail region of the nail body, and the connection piece is a nut.

[0011] In some embodiments, the hole is formed at a position of the nail body close to the head, and the distance between the hole and the thread stop is greater than twice the distance between the hole and the abutment structure.

[0012] In some embodiments, a cutting edge is formed at the tail of the nail body, and the cutting edge angle is set to 45-50 degrees.

[0013] In some embodiments, a limiting structure is provided at the tail of the handle near the weak structure.

[0014] In some embodiments, the limiting structure is configured to be spherical.

[0015] In some embodiments, the nut is provided with a barrel portion and a screwing portion, and the barrel portion is used to press against the cortical bone side.

[0016] In some embodiments, at least one of the nail body, the stem, and the connector is made of a degradable material.

[0017] According to an embodiment of the present invention, the handle rod penetrates the nail body from the cortical bone on one side of the bone joint to the cortical bone on the other side, the clamping structure of the nail body is pressed against the cortical bone on one side, and the connecting piece connected to the connecting structure at the tail of the nail body is pressed against the cortical bone on the other side. The nail body is firmly fixed to the bone joint by clamping together with the clamping structure and the connecting piece, avoiding the problem of loose fixation caused by cancellous bone; the nail body can penetrate through the fracture, and the suture passes through the hole on the nail body to tighten the tendon, thereby achieving tendon suturing and fracture fixation at the same time; by setting a weak structure, the handle rod can be easily separated from the nail body, thereby improving the convenience of surgical operation.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0020] Figure 1 is a schematic diagram of a multifunctional fixation device that can be used for tendon suturing and fracture fixation at the same time in one embodiment of the present invention;

[0021] Figure 2 It is a side view of a multifunctional fixation device that can be used for tendon suturing and fracture fixation at the same time in one embodiment of the present invention;

[0022] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0023] Figure 4 yes Figure 2 A partial enlarged view of point B in the middle.

[0024] Reference numerals:

[0025] 10: nail body; 11: thread; 12: tightening structure; 13: hole; 14: cutting edge;

[0026] 20: handle; 21: weak structure; 22: limiting structure;

[0027] 30: nut; 31: barrel; 32: screwing part;

[0028] 40: Suture. DETAILED DESCRIPTION

[0029] The present invention will now be discussed with reference to several embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present invention, rather than implying any limitation on the scope of the present invention.

[0030] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to"; the terms "embodiment" and "one embodiment" are to be interpreted as "at least one embodiment"; the term "another embodiment" is to be interpreted as "at least one other embodiment"; the terms "first", "second", etc. may refer to different or the same objects; the term "setting" is not limited to direct connection or indirect connection, nor is it limited to a specific connection method. Other explicit and implicit definitions may also be included below.

[0031] In the following description, some specific numerical values ​​or numerical ranges may be involved. It should be understood that these numerical values ​​and numerical ranges are merely exemplary, and they may be helpful in putting the idea of ​​the present invention into practice. However, the description of these examples is not intended to limit the scope of the present invention in any way. According to specific application scenarios and requirements, these numerical values ​​or numerical ranges can be set separately.

[0032] As mentioned above, it is difficult to use wire anchors and bone screws for surgical treatment at the same time in the prior art, and the wire anchors and bone screws are connected to the cancellous bone under stress, resulting in loose connections. The multifunctional fixation device that can be used for tendon suture and fracture fixation at the same time proposed in the embodiments of the present invention at least partially solves the above problems. Figure 1-Figure 4 The structure and working principle of the multifunctional fixation device which can be used for tendon suturing and fracture fixation in an embodiment of the present invention are described. Figure 1 and Figure 2As shown, the multifunctional fixation device of an embodiment of the present invention which can be used for tendon suturing and fracture fixation at the same time generally comprises a nail body 10, a handle rod 20, a connecting piece and a suture 40, wherein the nail body 10 is used to be implanted into a bone joint, the connecting piece is used to be connected to the tail of the nail body 10, the handle rod 20 is used to operate the implantation of the nail body 10, and the suture 40 is used to pass through the nail body 10 and suture with the tendon.

[0033] The nail body 10 is in the shape of a rod, and the rod has a head and a tail. It should be noted that in the embodiment of the present invention, the head refers to the end close to the operator during use, and the tail refers to the end away from the operator during use. The head is provided with a tightening structure 12 for tightening against the cortical bone side. Therefore, the tightening structure 12 only needs to have a hole 13 diameter cross-section larger than the preset hole 13 of the bone joint in the axial direction of the nail body 10, so that the tightening structure 12 will not be implanted into the bone joint together with the nail body 10. For example, Figure 3 As shown, the abutting structure 12 can be in the shape of a disc. In one embodiment, the abutting structure 12 is located at the end of the head of the nail body 10, that is, close to the weak structure 21. In another embodiment, the abutting structure 12 can also be located at a non-end position of the head. In fact, the closer the position of the abutting structure 12 is to the end, the greater the distance of the cortical bones on both sides of the bone joint that it is suitable for, that is, the greater the actual working length of the nail body 10.

[0034] The tail of the nail body 10 is provided with a connecting structure for detachably connecting with the connecting piece. Figure 4 As shown, the connecting structure is a thread 11 formed on the outer periphery of the tail end of the nail body 10. Accordingly, the connecting piece is set as a nut 30. The connection can be quickly completed and the distance between the nut 30 and the tightening structure 12 can be freely adjusted by screwing the nut 30 on the thread 11, thereby fixing the nail body 10 on the outer side of the cortical bone of the bone joint.

[0035] In one embodiment, a cutting edge 14 is formed at the tail of the nail body 10. When the nail body 10 is inserted into the preset hole 13 of the bone joint, the cutting edge 14 is conducive to guiding the nail body 10 to move forward, and at the same time further cuts the excess bone fragments in the preset hole 13, so that the resistance to the forward movement of the nail body 10 is smaller. Exemplarily, the cutting edge 14 is at an angle of 45-50 degrees for the best effect.

[0036] In one embodiment, the nail body 10 is further formed with a hole 13 that radially penetrates the nail body 10, and the hole 13 is used for the suture 40 to pass through, so that the suture 40 is connected to the nail body 10, and the suture 40 is tightened and fixed to the tendon. Exemplarily, the hole 13 is located closer to the head of the nail body 10, that is, the cancellous bone distance through which the suture 40 is pulled and moved is as short as possible, thereby reducing the resistance of the cancellous bone to the pulling and moving process of the suture 40. Exemplarily, the distance between the hole 13 and the stop of the thread 11 is greater than twice the distance between the hole 13 and the abutting structure 12. When the nail body 10 is fixed on the bone joint with the minimum applicable cortical bone spacing, that is, when the abutting structure 12 abuts against the cortical bone on one side, all the threads 11 just extend out of the cortical bone on the other side. When the suture 40 is pulled and moved, the cancellous bone resistance it bears is at most only 1 / 3 of the total cancellous bone width, thereby obtaining a sufficiently smooth suture 40 pulling experience.

[0037] In one embodiment, Figure 4 As shown, the nut 30 is provided with a barrel 31 and a screwing portion 32. The screwing portion 32 is, for example, formed into an outer hexagonal shape for tool operation and screwing. The barrel 31 has a smaller diameter than the screwing portion 32. The barrel 31 is used to press against the cortical bone side. When excessive screwing causes the barrel 31 to be pressed into the cortical bone, the cortical bone partially collapses. At this time, the nut 30 with a larger diameter is used to press against the cortical bone, thereby avoiding re-replacing the preset hole 13 position of the bone joint and reducing repeated surgical operations and secondary injuries.

[0038] The handle 20 has a head and a tail, and the tail is connected to the head of the nail body 10. The connection is formed into a weak structure 21, so that the operator can easily disconnect the handle 20 from the nail body 10. For example, Figure 3 As shown, the weak structure 21 may only have a smaller diameter than the adjacent structure, so that it is first destroyed under the action of external force. In addition, the weak structure 21 may also be pre-processed with a fracture mark, which has a weaker strength under the action of external force and is therefore more easily destroyed.

[0039] In one embodiment, a limiting structure 22 is further provided at the tail of the handle 20 near the weak structure 21. The limiting structure 22 facilitates the operator to observe the depth of the nail body 10 entering the bone joint. That is, when the operator observes that the limiting structure 22 is very close to the cortical bone side, the nail body 10 needs to be stopped to avoid damaging the cortical bone by the pressing structure 12. In this case, the cortical bone is also easily damaged when the weak structure 21 is broken in the next step. Exemplarily, the limiting structure 22 is set to be spherical, and the sphere has a smooth surface to avoid scratching the bone joint during surgery.

[0040] In one embodiment, any one of the nail body 10, the handle rod 20 and the connecting piece is made of a degradable material. Exemplarily, the degradable material is selected from a degradable magnesium alloy, so that after the nail body 10 is implanted in the bone joint, no secondary surgery is required for removal.

[0041] When using the multifunctional fixation device of the embodiment of the present invention that can be used for tendon suturing and fracture fixation at the same time, first, a preset hole 13 is drilled on the bone joint, the preset hole 13 passes through the fracture of the bone joint, and is drilled from one cortical bone to the other cortical bone; the suture 40 is passed through the hole 13, and the nail body 10 is driven by the handle rod 20 to extend into the cortical bone on one side, and extend from the cortical bone on the other side until the tightening structure 12 is tightened against the surface of the cortical bone on one side; then the nut 30 is screwed on the thread 11, so that the barrel 31 of the nut 30 is tightened against the surface of the cortical bone on the other side, and the handle rod 20 is broken off from the weak structure 21; the tendon is fixed by sutures to complete the surgical operation.

[0042] The description of the embodiments herein and any reference to directions and orientations are only for the convenience of description and are not to be construed as any limitation on the scope of protection of the present invention. The description of the preferred embodiments may involve combinations of features, which may exist independently or in combination, and the present invention is not particularly limited to the preferred embodiments. The scope of the present invention is defined by the claims.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional fixation device that can be used for tendon suturing and fracture fixation at the same time, characterized in that: include: The nail body (10) is provided with a head portion close to the operator and a tail portion away from the operator when in use, the tail portion is provided with a connection structure, and the head portion is provided with a tightening structure (12), and a hole (13) radially penetrating the nail body is also formed on the nail body (10); The handle rod (20) is provided with a head portion close to the operator and a tail portion away from the operator when in use, and the tail portion is connected to the head portion of the nail body (10) via a weak structure, so that the handle rod (20) can be disconnected from the nail body (10) at the weak structure (21); A connecting piece, connected to the connecting structure at the tail of the nail body (10) to be in a connected state, so that in the connected state, the connecting piece and the abutting structure (12) can be clamped on both sides of the cortical bone; A suture (40) is passed through the hole (13).

2. The multifunctional fixation device that can be used for tendon suturing and fracture fixation according to claim 1, characterized in that: The connection structure is a thread (11) formed on the outer periphery of the tail region of the nail body (10), and the connection piece (30) is a nut (30).

3. The multifunctional fixation device that can be used for tendon suturing and fracture fixation according to claim 2, characterized in that: The hole (13) is formed at a position of the nail body (10) close to the head, and the distance between the hole (13) and the end of the thread (11) is greater than twice the distance between the hole (13) and the abutment structure (12).

4. The multifunctional fixation device that can be used for tendon suturing and fracture fixation according to claim 1, characterized in that: A cutting edge (14) is formed at the tail of the nail body (10), and the angle of the cutting edge (14) is set to 45-50 degrees.

5. The multifunctional fixation device that can be used for tendon suturing and fracture fixation according to claim 1, characterized in that: A limiting structure (22) is provided at the tail of the handle rod (20) close to the weak structure.

6. The multifunctional fixation device that can be used for tendon suturing and fracture fixation according to claim 5, characterized in that: The limiting structure is configured to be spherical.

7. The multifunctional fixation device that can be used for tendon suturing and fracture fixation according to claim 2, characterized in that: The nut (30) is provided with a barrel portion (31) and a screwing portion (32), and the barrel portion (31) is used to press against the cortical bone side.

8. The multifunctional fixation device that can be used for tendon suturing and fracture fixation according to claim 1, characterized in that: At least one of the nail body (10), the handle (20) and the connecting piece is made of a degradable material.

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