A suture anchor for meniscus tears

Abstract

The application relates to the field of orthopedic medical instrument technology, in particular to a suture nail for meniscus tear. The suture nail comprises a nail head and a nail tail, the nail head and the nail tail are connected through a rigid connection structure, the meniscus is composed of a meniscus tear part and a meniscus non-tear part, when the nail head is inserted into the meniscus non-tear part, the nail tail can abut against the meniscus tear part, the nail tail is triggered, the nail tail can drive the nail tail to move towards the direction close to the nail head through the rigid connection structure, and the nail tail can drive the meniscus tear part to move to the position sutured with the meniscus non-tear part during the movement. In the application, the medical staff does not need to perform suture during the repair operation of the meniscus tear, the operation time can be reduced, the pain of the patient can be reduced, and the operation process is relatively simple.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of orthopedic medical devices, in particular to a suture nail for meniscus tear. BACKGROUND

[0002] Meniscus is one of the important structures of knee joint, which is two semilunar fibrocartilages between femoral condyle and tibial plateau. The function of meniscus is to stabilize the knee joint, distribute the load of knee joint, and promote the nutrition in the joint.

[0003] Meniscus tear is a common sports injury, which is usually caused by torsional external force. When the knee joint is in a semi-flexion rotation position, it is very easy to cause meniscus tear. Therefore, meniscus tear is more likely to occur in football players or coal miners and other heavy laborers.

[0004] One of the more common meniscus tears is horizontal tear. When the meniscus is horizontally torn, a suture surgery is usually needed to repair it. When suturing the meniscus, a meniscus suture needle can be used for direct suture, or a meniscus suture gun can be used for suture.

[0005] According to the related technology in the above, the inventors believe that whether using a meniscus suture needle or a meniscus suture gun for suture, the suture line needs to be pulled and knotted, and the surgical process is relatively complex. SUMMARY

[0006] In order to improve the problem that the operation process is relatively complex when performing a suture surgery on the meniscus, the present application provides a suture nail for meniscus tear.

[0007] The suture nail for meniscus tear provided by the present application adopts the following technical solution:

[0008] A suture nail for meniscus tear, comprising a nail head and a nail tail, the nail head and the nail tail are connected by a rigid connection structure, the meniscus is composed of a meniscus torn part and a meniscus un-torn part, when the nail head is inserted into the meniscus un-torn part, the nail tail can abut against the meniscus torn part, triggering the nail tail, the nail tail can drive the nail tail to move towards the nail head through the rigid connection structure, and the nail tail can drive the meniscus torn part to move to a position where the meniscus torn part is sutured with the meniscus un-torn part during the movement of the nail tail.

[0009] By adopting the technical scheme, when repairing the torn meniscus, the nail head is implanted into the predetermined position of the non-torn part of the meniscus through the matched tool, then the nail tail is abutted against the torn part of the meniscus, the nail tail is triggered, the torn part of the meniscus can be driven to move close to the non-torn part of the meniscus through the rigid connection structure, and when the torn part of the meniscus moves to the position of being sutured with the non-torn part of the meniscus, the triggering of the nail tail is stopped, and the repair of the meniscus is completed. When the repair surgery of the torn meniscus is performed, the medical staff does not need to perform surgical suturing, the surgery time can be reduced, the pain of the patient can be reduced, and the operation process is relatively simple.

[0010] Optionally, the rigid connection structure is a threaded connection structure or a ratchet and groove anti-disengagement connection structure.

[0011] By adopting the technical scheme, the threaded connection structure or the ratchet and groove anti-disengagement connection structure can fix the nail tail to the nail head, and then realize the close adhesion of the torn part of the meniscus and the non-torn part of the meniscus, realize the repair of the torn meniscus, and the operation process is relatively simple.

[0012] Optionally, a threaded hole is formed in one end of the nail head inwards, and a thread is arranged on the nail tail and is in threaded connection with the threaded hole, and the nail tail is triggered by rotating.

[0013] By adopting the technical scheme, after the implantation of the nail head is completed, the nail tail is screwed into the position where the nail head is located, the thread on the nail tail drives the torn part of the meniscus to move close to the non-torn part of the meniscus during the movement of the nail tail, and the fixing of the nail tail is completed until the torn part of the meniscus reaches the position of being sutured with the non-torn part of the meniscus, and the operation process is relatively simple.

[0014] Optionally, a limiting assembly for limiting the rotation of the nail tail is further arranged on the nail tail.

[0015] By adopting the technical scheme, the nail tail is limited by the limiting assembly, the possibility of rotating due to vibration or external force after the nail tail is screwed into the human tissue is reduced, the stability of the nail tail is increased, and the repair effect of the torn meniscus is ensured.

[0016] Optionally, an end of the nail tail is fixedly connected with a limiting block, and the limiting assembly comprises: a gasket, which is sleeved outside the nail tail and abuts against the outer wall of the limiting block; and a rib plate, which is fixedly connected between the limiting block and the nail tail, and the inner wall of the gasket is provided with a limiting groove for clamping the rib plate.

[0017] By adopting the technical scheme, when the nail tail is screwed into the meniscus, the washer is first sleeved outside the nail tail, the rib plate is inserted into the limiting groove, and the preliminary fixation of the washer is realized. The setting of the washer can increase the area of the end of the nail tail and reduce the possibility of the end of the nail tail penetrating into the meniscus; the rib plate is limited by the limiting groove, the possibility of the nail tail rotating in the washer is reduced, and the stability of the nail tail is maintained.

[0018] Optionally, the outer wall of the nail head is fixedly connected with a first barb needle.

[0019] By adopting the technical scheme, the first barb needle of the outer wall of the nail head can reduce the possibility of the nail head deviating from the original predetermined position after implantation and affecting the repair of the meniscus.

[0020] Optionally, the outer wall of the washer is fixedly connected with a second barb needle.

[0021] By adopting the technical scheme, the second barb needle of the outer wall of the washer can reduce the possibility of the washer being removed after implantation, further strengthen the limiting effect of the nail tail, and reduce the possibility of the nail tail being removed after implantation.

[0022] Optionally, the limiting block is provided with a driving groove capable of cooperating with a nail tail fastening tool on the side away from the nail head.

[0023] By adopting the technical scheme, the driving groove provides convenience for the operator to screw and fix the nail tail.

[0024] Optionally, the suture nail for meniscus tear is made of degradable and non-biotoxic material.

[0025] By adopting the technical scheme, the degradable and non-biotoxic suture nail body can be degraded in the human body without the need for secondary surgery, and the suture nail body is made of non-biotoxic material, effectively reducing the harm to the human body.

[0026] Optionally, the suture nail for meniscus tear is made of absorbable magnesium alloy or absorbable polymer material.

[0027] By adopting the technical scheme, the absorbable magnesium alloy is a degradable medical metal material with good absorbability and biocompatibility, controllable corrosion rate, large load weight, can promote bone formation, and self-degrade after bone healing. The suture nail body made of absorbable magnesium alloy material can self-degrade after implantation without the need for removal, reducing the pain of patients caused by secondary surgery for removing the suture nail body.

[0028] The degradable absorbable polymer material is broken by hydrolysis or enzymatic reaction, so that the polymer main chain is broken, the molecular weight gradually decreases, and finally becomes a monomer or is metabolized into water and carbon dioxide, which can be absorbed by the human body. After the meniscus repair is completed, it does not need to be taken out, and the pain of the patient caused by the secondary surgery to take out the suture nail body can be reduced.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. By driving the nail head into the predetermined position of the non-torn part of the meniscus, and driving the nail tail against the torn part of the meniscus, the nail tail is triggered to drive the nail tail to move in the direction of the nail head through the rigid connection structure, that is, to drive the torn part of the meniscus to move to the suture position of the non-torn part of the meniscus, so as to repair the torn meniscus, without the need for surgical line implantation, and effectively improving the problem that the operation process is relatively complex when suturing the meniscus;

[0031] 2. By selecting the material of the suture nail to be degradable and non-bio-toxic, the suture nail body can be self-degraded in the human body, and does not need to be taken out after the meniscus repair is completed, thereby reducing the pain of the patient caused by the secondary surgery. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0033] Figure 2 is a schematic diagram of the structure of the torn meniscus according to the embodiment of the present application;

[0034] Figure 3 is a schematic diagram of the structure of the repaired torn meniscus according to the embodiment of the present application;

[0035] Figure 4 is a schematic diagram of the local structure of the embodiment of the present application highlighting the threaded hole;

[0036] Figure 5 is a schematic diagram of the local structure of the embodiment of the present application highlighting the nail tail;

[0037] Figure 6 is a schematic diagram of the local structure of the embodiment of the present application highlighting the gasket.

[0038] BRIEF DESCRIPTION OF DRAWINGS a, torn part of the meniscus; b, non-torn part of the meniscus; 1, nail head; 11, threaded hole; 12, first barb needle; 2, nail tail; 3, limiting assembly; 31, gasket; 311, limiting groove; 312, second barb needle; 32, rib plate; 4, limiting block; 41, driving groove. DETAILED DESCRIPTION

[0039] The following will be described in combination with the drawingsFigures 1-6 The application is further described in detail.

[0040] The application discloses a suture nail for meniscus tear. Figure 1 and Figure 2 The suture nail for meniscus tear comprises a nail head 1 and a nail tail 2, and the nail head 1 and the nail tail 2 are connected through a rigid connection structure. The meniscus is composed of a meniscus tear part a and a meniscus non-tear part b. When the nail head 1 is implanted into the meniscus non-tear part b, the nail tail 2 abuts against the meniscus tear part a, triggers the nail tail 2, and the nail tail 2 can drive the nail tail 2 to move towards the nail head 1 through the rigid connection structure. During the movement of the nail tail 2, the nail tail 2 can drive the meniscus tear part a to move to a position for suture with the meniscus non-tear part b.

[0041] Referring to Figure 3 During the repair surgery of the torn meniscus, the nail head 1 is first implanted into a predetermined position of the meniscus non-tear part b by using a matched instrument, and then the nail tail 2 is abutted against the meniscus tear part a to trigger the nail tail 2, so that the nail tail 2 can drive the meniscus tear part a to move until the meniscus tear part a moves to the position for suture with the meniscus non-tear part b. During the repair of the torn meniscus, the implantation of surgical thread is not needed, the surgery time of the meniscus tear repair surgery is effectively reduced, the pain of the patient is reduced, and the problem that the operation process is relatively complex during the suture surgery of the meniscus can be effectively improved.

[0042] The suture nail for meniscus tear mentioned in the application is made of a degradable and non-bio-toxic material, and can be made of absorbable magnesium alloy or absorbable high polymer material. Commonly used absorbable high polymer material includes polylactic acid or polyglycolic acid.

[0043] The absorbable magnesium alloy has good absorbability and biocompatibility, controllable corrosion rate, large load weight, can promote osteogenesis, and can be degraded after bone healing. The suture nail body made of the absorbable magnesium alloy can be degraded after implantation, and does not need to be taken out, thereby reducing the pain of the patient caused by the secondary surgery for taking out the suture nail body after the implantation of the suture nail body into the meniscus for repair.

[0044] The degradable and absorbable high polymer material can make the high molecular main chain break through hydrolysis or enzymatic reaction, and the molecular weight gradually decreases, so that the high polymer material finally becomes a monomer that can be absorbed by the human body or is metabolized into water or carbon dioxide. The suture nail body does not need to be taken out after the completion of the meniscus repair, and the pain of the patient caused by the secondary surgery for taking out the suture nail body can be reduced.

[0045] Referring to Figure 1 and Figure 4The rigid connection between the nail head 1 and the nail tail 2 can be selected from a threaded connection structure or a ratchet and groove anti-disconnection connection structure, and in the embodiment, the threaded connection structure is adopted. Specifically, one end of the nail head 1 is a pointed end, facilitating the implantation of the nail head 1, and the other end of the nail head 1 is provided with a threaded hole 11 inwardly, and one end of the nail tail 2 is provided with a thread, the thread is arranged along the length direction of the nail tail 2, and the thread of the nail tail 2 can be threadedly connected with the threaded hole 11 of the nail head 1. The nail head 1 and the nail tail 2 are used in cooperation to realize the connection of the nail tail 2 and the nail head 1, and the nail tail 2 is triggered by rotating the nail tail 2.

[0046] With reference to Figure 2 and Figure 4 After the nail head 1 is implanted in the predetermined position of the un-torn part b of the meniscus, the nail tail 2 is screwed in, so that the nail tail 2 can be threadedly connected with the threaded hole 11 of the nail head 1, and then the nail tail 2 is rotated. During the movement of the nail tail 2, the thread on the nail tail 2 can drive the torn part a of the meniscus to move towards the un-torn part b of the meniscus until the torn part a of the meniscus moves to the position of suturing with the un-torn part b of the meniscus, thereby completing the repair of the torn meniscus, and the connection is stable and the operation process is relatively convenient.

[0047] When the rigid connection structure between the nail head 1 and the nail tail 2 is selected from the ratchet and groove anti-disconnection connection structure, the trigger mode is selected to be pressing trigger, and the ratchet and groove anti-disconnection connection structure will not be described here.

[0048] In actual production, the outer diameter of the nail head 1 can be set to 1.5-3.0 mm, and during the operation, medical staff can select the nail head 1 with a suitable outer diameter according to different parts of the patient or the age of the patient, thereby improving the applicability of the suture nail body.

[0049] With reference to Figure 1 The outer wall of the nail head 1 is fixedly connected with a plurality of first barb needles 12, the plurality of first barb needles 12 are designed in an integrated manner with the nail head 1, the plurality of first barb needles 12 are divided into a plurality of groups, each group has a plurality of first barb needles 12, the plurality of groups of first barb needles 12 are distributed along the axial direction of the nail head 1, and the plurality of first barb needles 12 in each group are uniformly and spacedly distributed along the circumferential direction of the nail head 1, and the axial direction of each first barb needle 12 and the axial direction of the nail head 1 are both acute angles. The plurality of first barb needles 12 can effectively reduce the possibility of the nail head 1 being pulled out after being implanted. In order to ensure the anti-disconnection effect of the first barb needle 12, in actual production, preferably, each group of first barb needles 12 is provided with at least three first barb needles 12.

[0050] In actual production, the angle of the pointed end of the first barb needle 12 is preferably 20-30°, and the angle between the long side of each first barb needle 12 and the axial direction of the nail head 1 is preferably 30-40°.

[0051] With reference to Figure 1The limiting assembly 3 is arranged on the nail tail 2 and is used for limiting the nail tail 2 to reduce the possibility of rotation or movement of the nail tail 2 after implantation.

[0052] With reference to Figure 1 and Figure 5 , the limiting block 4 is fixedly connected to the end of the nail tail 2 away from the thread, and the limiting block 4 is designed in an integrated manner with the nail tail 2. The limiting block 4 is in the shape of a boss, and the diameter of the limiting block 4 gradually increases from the side close to the nail tail 2 to the side away from the nail tail 2. The limiting assembly 3 comprises a washer 31, which is in the shape of a boss, and the diameter of the washer 31 gradually increases from the side close to the nail tail 2 to the side away from the nail tail 2. The inner wall of the washer 31 is in close contact with the outer wall of the limiting block 4. The inner wall of the washer 31 is provided with a plurality of limiting grooves 311 (as shown in FIG. 13) that are uniformly and spacedly distributed along the inner diameter of the washer 31. A plurality of rib plates 32 are fixedly connected between the nail tail 2 and the limiting block 4, and the plurality of rib plates 32 are uniformly and spacedly distributed along the outer diameter of the limiting block 4. The plurality of rib plates 32 and the plurality of limiting grooves 311 correspond to each other, and each rib plate 32 is inserted into the corresponding limiting groove 311. Figure 6

[0053] Before the implantation of the nail tail 2, the washer 31 is slidably sleeved on the nail tail 2 from the end of the nail tail 2 with the thread, and the plurality of rib plates 32 are inserted into the corresponding limiting grooves 311, so as to complete the installation of the washer 31. During the screwing of the nail tail 2, the washer 31 is retained outside the meniscus.

[0054] The washer 31 can increase the area of the limiting block 4 and reduce the possibility of the limiting block 4 sinking into the meniscus. In addition, the plurality of limiting grooves 311 limit the rib plates 32, thereby limiting the nail tail 2 and reducing the possibility of rotation of the nail tail 2 after implantation into the meniscus.

[0055] With reference to Figure 1 and Figure 6 , the outer wall of the washer 31 is fixedly connected with a plurality of second barb needles 312, which are designed in an integrated manner with the washer 31. The plurality of second barb needles 312 are divided into a plurality of groups, each group comprising a plurality of second barb needles 312. The plurality of groups of second barb needles 312 are spacedly distributed along the axial direction of the washer 31, and the plurality of second barb needles 312 in each group are uniformly and spacedly distributed along the circumferential direction of the washer 31. The long side of each second barb needle 312 forms an acute angle with the axial direction of the washer 31. The plurality of second barb needles 312 can effectively reduce the possibility of sliding and slipping of the washer 31. In order to ensure the anti-slipping effect of the second barb needles 312, preferably, each group of second barb needles 312 comprises at least three second barb needles 312.

[0056] ​In actual production, the tip angle of the second barbed needle 312 is preferably 30-40°, and the angle between the long side of each second barbed needle 312 and the axial direction of the gasket 31 is preferably 15-20°.

[0057] Referring to Figure 5 The side of the limiting block 4 away from the nail tail 2 is internally provided with a driving groove 41, and the driving groove 41 can be used in cooperation with a fastening tool capable of fastening the nail tail 2 to provide convenience for the operator to implant the nail tail 2. The fastening tool can be a screwdriver, so the driving groove 41 can be cross-shaped, straight-shaped or key-shaped. In actual production, a matching driving groove 41 can be provided according to actual use requirements.

[0058] The suture nail for meniscus tear in the embodiment of the present application has the following two implementation manners:

[0059] Manner one: the nail head 1 is implanted into the predetermined position of the non-torn part b of the meniscus by using the matching tool of the nail head 1, the first barbed needle 12 on the nail head 1 can position the nail head 1, the threaded end of the nail tail 2 is then passed through the gasket 31, the rib plate 32 on the limiting block 4 is inserted and matched with the limiting groove 311 of the gasket 31, and then the nail tail 2 is implanted into the meniscus, the nail tail 2 is screwed into the threaded groove of the nail head 1 by rotating the nail tail 2, the nail tail 2 can drive the torn part a of the meniscus to move, and the torn meniscus is repaired when the torn part a of the meniscus moves to the suture position of the non-torn part b of the meniscus.

[0060] Manner two: the threaded end of the nail tail 2 is first passed through the gasket 31 and screwed into the threaded hole 11 of the nail head 1, and then the whole is implanted into the predetermined position of the non-torn part b of the meniscus by using the matching tool, the nail tail 2 is rotated to make the nail tail 2 rotate towards the threaded hole 11, the nail tail 2 can realize traction on the torn part a of the meniscus in the process of rotating the nail tail 2, and the torn meniscus is repaired when the torn part a of the meniscus moves to the suture position of the non-torn part b of the meniscus.

[0061] In the present application, unless otherwise explicitly defined and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or can be integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0062] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A suture anchor for use in meniscal tears, characterized by: The application relates to a suture nail for meniscus tear, which comprises a nail head (1) and a nail tail (2), wherein the nail head (1) and the nail tail (2) are connected through a rigid connection structure; the meniscus is composed of a meniscus tear part (a) and a meniscus non-tear part (b); when the nail head (1) is inserted into the meniscus non-tear part (b), the nail tail (2) can abut against the meniscus tear part (a) to trigger the nail tail (2); the nail tail (2) can drive the nail tail (2) to move towards the nail head (1) through the rigid connection structure, and the meniscus tear part (a) can be moved to a position for suturing with the meniscus non-tear part (b) during the movement of the nail tail (2), the rigid connection structure is a threaded connection structure or a ratchet and groove anti-disengagement connection structure, one end of the nail head (1) is internally provided with a threaded hole (11), the nail tail (2) is provided with threads for screwing with the threaded hole (11), and the nail tail (2) is triggered by rotating, the nail tail (2) is further provided with a limiting assembly (3) for limiting the rotation of the nail tail (2), an end of the nail tail (2) is fixedly connected with a limiting block (4), and the limiting assembly (3) comprises: a gasket (31) which is sleeved on the outer wall of the nail tail (2) and whose inner wall abuts against the outer wall of the limiting block (4); a rib plate (32) which is fixedly connected between the limiting block (4) and the nail tail (2), and the inner wall of the gasket (31) is internally provided with a limiting groove (311) for clamping the rib plate (32), the outer wall of the nail head (1) is fixedly connected with a first barb needle (12), and the outer wall of the gasket (31) is fixedly connected with a second barb needle (312).

2. A suture anchor for use in meniscal repair according to claim 1, wherein: The side, away from the nail head (1), of the limiting block (4) is provided with a driving groove (41) which can be used in cooperation with a fastening tool of the nail tail (2).

3. A suture anchor for use in meniscal repair according to any one of claims 1 to 2, wherein: The suture nail for meniscus tear is made of degradable and non-biotoxic material.

4. A suture anchor for use in meniscal repair according to claim 3, wherein: The suture nail for meniscus tear is made of absorbable magnesium alloy or absorbable polymer material.

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