Fixing device for repairing knee joint fibrocartilage and surgical implanter

Abstract

The utility model provides a fixing device for repairing knee joint fibrocartilage and a surgical implanter. The fixing device comprises a device body with a hollow structure and a suture line connected into the hollow structure in a penetrating mode. The device body comprises a front end, a rear end and a middle part located between the front end and the rear end, a plurality of annular stepped protrusions are arranged on the surface of the middle part of the device body, and the maximum radial diameters of the annular stepped protrusions are gradually increased in sequence from the front end to the rear end, so that the maximum radial diameters of the annular stepped protrusions are gradually increased in the hammering process of the device body; free natural fixing is achieved, further, through a blocking protrusion arranged between the annular step protrusion and the rear end, excessive hammering is prevented, surgical risks are avoided, the device has the advantages of being simple and reasonable in structural design and facilitating surgical operation, and the technical problems that a traditional device is various and complex in structural part and inconvenient in surgical operation are solved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a fixation device and a surgical implant for repairing fibrocartilage of a knee joint. Background Art

[0002] When the human body's knee cartilage tissue is torn off the bone and needs to be repaired, such as repairing a torn meniscus, surgeons often use a surgical implant to insert a wired anchor fixation device into the bone to fix the soft tissue to the bone through sutures, effectively avoiding the "bungee effect" and reducing the risk of surgical failure.

[0003] Currently, existing fixation devices for repairing fibrocartilage tissue of the knee joint have technical problems of complex structure and inconvenient operation.

[0004] For example, a meniscus suture system disclosed in the existing Chinese patent application No. 202010699522.0 includes an expansion screw, an expansion screw pusher and a suture hook; the expansion screw is composed of an inner core and an outer shell; the outer shell is cylindrical, and two suture threads are arranged on the top of the outer shell, and an internal thread is arranged on the outer shell. The inner core is a conical screw, and a hexagonal hole is arranged on the large end face of the conical screw. The thread of the inner core cooperates with the internal thread of the outer shell. After the inner core is rotated into the outer shell, the outer shell expands to achieve the fixation of the expansion screw.

[0005] The fixing device of this patented technology needs to be fixed by rotating the inner core in the outer shell to expand the outer shell. The existence of rotational force will undoubtedly increase the difficulty of surgical operation, and there is also the problem of numerous and complex structural parts of the device.

[0006] Therefore, for those skilled in the art, there is an urgent need to develop a fixation device and a surgical implant for repairing knee joint fibrocartilage that has a simple structure and is easy to perform surgical operations. Utility Model Content

[0007] In view of this, in order to solve or partially solve the above-mentioned problems, an embodiment of the present application provides a new type of fixation device for repairing fibrocartilage of the knee joint, by arranging a plurality of annular step protrusions on the surface of the middle part of the device body, and the maximum radial diameters of the plurality of annular step protrusions gradually increase from the front end to the rear end, so that the device body can achieve free natural fixation during the hammering process, and further by arranging a stop protrusion between the annular step protrusion and the rear end, excessive hammering is prevented to avoid surgical risks. The device has a simple and reasonable structural design and is convenient for surgical operation, which solves the technical problems of traditional devices with numerous and complex structural parts and inconvenient surgical operation.

[0008] To achieve the above-mentioned purpose, the embodiment of the present application provides, on one hand, a fixation device for repairing fibrocartilage of a knee joint, comprising a device body having a hollow structure and a suture thread inserted and connected in the hollow structure;

[0009] The device body includes a front end, a rear end, and a middle part located between the front end and the rear end, and a plurality of annular step protrusions are arranged on the outer surface of the middle part, and the maximum radial diameters of the plurality of annular step protrusions gradually increase from the front end to the rear end; a stop protrusion is arranged on the outer surface of the middle part close to the rear end, and the stop protrusion is located between the annular step protrusion and the rear end.

[0010] Furthermore, a groove is provided on the end surface of the rear end of the device body, and a through hole for passing the suture thread is provided on the bottom of the groove.

[0011] Furthermore, one end of the suture thread is knotted to form a knotted ball, the knotted ball is placed in the groove, and the other end passes through the hollow structure and then extends out from the front end.

[0012] Furthermore, the suture line includes a knotting section and a suture section, the knotting section includes the knotted ball and a connecting ring formed by knotting, and the suture section is passed through and connected to the connecting ring.

[0013] Furthermore, the axial cross-section of the annular stepped protrusion is trapezoidal.

[0014] Furthermore, the radial diameter of the retaining protrusion is greater than the maximum radial diameter of any of the annular step protrusions.

[0015] On the other hand, an embodiment of the present application provides a surgical implanter, including an anchor fixing device, a push rod and a handle, wherein the anchor fixing device is a fixing device for repairing knee joint fibrocartilage as described in any of the above embodiments, including a device body with a hollow structure and a suture thread inserted and connected in the hollow structure; the device body includes a front end, a rear end, and a middle part located between the front end and the rear end, a plurality of annular step protrusions are arranged on the outer surface of the middle part, and the maximum radial diameters of the plurality of annular step protrusions gradually increase from the front end to the rear end; a stop protrusion is arranged on the outer surface of the middle part close to the rear end, and the stop protrusion is located between the annular step protrusion and the rear end; one end of the push rod is detachably connected to the rear end of the device body, and the other end is connected to the handle.

[0016] Furthermore, a depth scale is provided on the outer surface of the push rod.

[0017] Further, the handle includes a stop block, a wire pressing block, and a hammer part. The wire pressing block is located between the stop block and the hammer part and can slide elastically.

[0018] Further, a through hole is axially formed in the stop block, and the suture passes through the through hole. By the elastic sliding of the wire pressing block, the pressing and arranging of the suture are realized.

[0019] Compared with the prior art, the advantages of the present application are as follows:

[0020] The present application provides a novel fixing device for repairing knee joint fibrocartilage. By providing a plurality of annular stepped protrusions on the surface of the middle part of the device body, and the maximum radial diameter of the plurality of annular stepped protrusions gradually increases in sequence from the front end to the rear end, during the process of hammering the device body, free natural fixation is realized. Further, by providing a stop convex between the annular stepped protrusion and the rear end, over-hammering of the device body is prevented, avoiding the occurrence of surgical risks, and having the beneficial effects of simple and reasonable structural design and convenient surgical operation. Description of the Drawings

[0021] The following drawings are used to provide a further understanding of the present application, constitute a part of the present application, and are only intended to make a schematic explanation and illustration of the present utility model, and are not used to limit the scope of the present utility model. In the drawings:

[0022] Figure 1 is a schematic structural diagram of a fixing device for repairing knee joint fibrocartilage in an embodiment of the present application;

[0023] Figure 2 is a schematic structural diagram of a fixing device for repairing knee joint fibrocartilage in another embodiment of the present application;

[0024] Figure 3 is a schematic overall structural diagram of a surgical implant in another embodiment of the present application;

[0025] Figure 4 is a schematic cross-sectional structural diagram of a surgical implant in another embodiment of the present application;

[0026] Figure 5 is Figure 4 an enlarged structural diagram of part A in

[0027] Reference Signs:

[0028] 1. Device body; 10. Hollow structure; 11. Front end; 12. Rear end; 13. Middle part; 14. Annular stepped protrusion; 15. Stop convex; 120. Groove; 121. Bottom of the groove; 122. Through hole;

[0029] 2. Suture; 20. Knotting ball; 21. Knotting segment; 201. Connecting ring; 22. Suture segment;

[0030] 3. Push rod; 30. Depth scale;

[0031] 4. Handle; 40. Center column; 41. Stopper; 42. Wire pressing block; 43. Hammer part; 410. Through hole; 420. Compression spring. DETAILED DESCRIPTION

[0032] Several implementation modes of the present application will be disclosed below in the form of drawings, which clearly and completely describe the technical solution of the present application and constitute a part of the specification of the present application. The drawings are used to provide a further understanding of the present application. The schematic embodiments and descriptions of the present application are used to explain the present utility model and do not constitute an improper limitation on the application. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0033] It should be noted that in this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral whole, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] In addition, the technical solutions between the various embodiments of the present application can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0035] Embodiment 1

[0036] See also Figure 1 As shown, this embodiment provides a fixing device for repairing fibrocartilage of the knee joint, which is a columnar anchor structure, including a device body 1 with a hollow structure 10 and a suture 2 inserted and connected in the hollow structure 10; the device body 1 includes a front end 11, a rear end 12, and a middle part 13 located between the front end 11 and the rear end 12, and a plurality of annular step protrusions 14 are arranged on the outer surface of the middle part 13, and the maximum radial diameters of the plurality of annular step protrusions 14 gradually increase in sequence from the front end 11 to the rear end 12; a stop protrusion 15 is arranged on the outer surface of the middle part 13 close to the rear end 12, and the stop protrusion 15 is located between the annular step protrusion 14 close to the rear end and the rear end 12.

[0037] It should be noted that, combined withFigure 3 As shown, the so-called front end 11 of the embodiment of the present application refers to the end of the device body 1 away from the push rod 3 of the surgical implant; the so-called rear end 12 refers to the connection end of the device body 1 and the push rod 3 of the surgical implant.

[0038] When the suture 2 of the embodiment of the present application is not used in surgery, combined with Figure 3 As shown, the rear end 12 of the device body 1 is inserted and connected to the push rod 3 of the surgical implant. The suture 2 extending from the front end 11 of the device body 1 is pressed, surrounded and arranged on the handle 4 of the surgical implant to prevent the suture from being messy and facilitate the sorting operation of medical staff; when performing surgery, after the suture 2 is taken out from the handle 4 of the surgical implant, it is introduced into the opened bone tunnel and pulled out. When the device body 1 is introduced into the region of the fibrocartilage injury and tear, while tightening the suture 2, the tail of the handle 4 of the surgical implant is hammered with a hammer. Since a plurality of annular stepped protrusions 14 are provided on the outer surface of the middle part 13 of the device body 1, and the maximum radial diameters of the plurality of annular stepped protrusions 14 gradually increase in sequence along the direction from the front end 11 to the rear end 12, the device body 1 is stably hammered and fixed in the bone tunnel of the injury and tear region, having the beneficial effects of simple and reasonable structural design and convenient surgical operation.

[0039] Specifically, as Figure 1 shown, the maximum radial diameter of the annular stepped protrusion 14 closest to the front end of the device body 1 is D1, the maximum radial diameter of the annular stepped protrusion 14 in the direction of the rear end in sequence is D2, and the maximum radial diameter of the annular stepped protrusion 14 closest to the rear end is D3. The corresponding relationship is: D3 > D2 > D1, so that during the process of hammering the device body 1, free natural fixation is realized, and further, by means of the retaining convex 15 arranged close to the rear end, it is prevented that the device body 1 is hammered excessively and the surgical risk is avoided, having the beneficial effects of simple and reasonable structural design and convenient surgical operation.

[0040] As a preferred embodiment, as Figure 1 shown, a groove 120 for placing the suture knotting mass 20 is opened on the end surface of the rear end 12 of the device body 1. A through hole 122 for passing through the suture 2 is opened on the bottom 121 of the groove 120. The aperture of the through hole 122 is smaller than the mass diameter of the knotting mass 20 to prevent the knotting mass 20 from falling off when the suture 2 is tightened. One end of the suture 2 is knotted to form the knotting mass 20, the knotting mass 20 is placed in the groove 120, and the other end passes through the hollow structure 10 and extends out from the front end 11.

[0041] As another preferred embodiment, as Figure 2As shown, the suture 2 includes a knotting section 21 and a suture section 22. The knotting section 21 includes the knotted ball 20 and a connecting ring 201 formed by knotting. The suture section 22 is penetrated and connected to the connecting ring 201. After two sutures 2 pass through the connecting ring 201 structure, four tail sutures are formed and extend from the front end of the device body 1, and are sutured to the fibrous cartilage of the knee joint by a suture hook.

[0042] Furthermore, in order to better prevent the knotted ball 20 from falling off, one end of the knotted ball 20 can be inserted into the surgical implant for re-fixation. In other words, as long as the technical means can prevent the knotted ball 20 from falling off, they are within the protection scope of this application.

[0043] like Figure 1 , Figure 2 As shown, the axial cross-section of the annular stepped protrusion 14 is preferably, but not limited to, a trapezoid, and can be designed as a protrusion of other shapes according to actual conditions. The radial diameter of the retaining protrusion 15 is greater than the maximum radial diameter of any of the annular stepped protrusions 14, that is, the radial diameter of the retaining protrusion 15 provided in the embodiment of the present application is greater than the maximum radial diameter of the annular stepped protrusion 14 near the rear end.

[0044] Embodiment 2

[0045] like Figure 3 , Figure 4 As shown, the present application embodiment provides a surgical implant, which includes an anchor fixing device, a push rod 3 and a handle 4. The anchor fixing device is the fixing device for repairing the fibrocartilage of the knee joint as described in the first embodiment above, combined with Figure 1 , Figure 2 As shown, the fixing device specifically includes a device body 1 with a hollow structure 10 and a suture 2 inserted and connected in the hollow structure 10; the device body 1 includes a front end 11, a rear end 12, and a middle part 13 located between the front end 11 and the rear end 12, and a plurality of annular step protrusions 14 are arranged on the outer surface of the middle part 13, and the maximum radial diameters of the plurality of annular step protrusions 14 gradually increase from the front end 11 to the rear end 12; a stop protrusion 15 is arranged on the outer surface of the middle part 13 close to the rear end 12, and the stop protrusion 15 is located between the annular step protrusion 14 and the rear end 12; one end of the pushing rod 3 is detachably connected to the rear end 12 of the device body 1, and the other end is connected to the handle 4.

[0046] like Figure 3 , Figure 4 and Figure 5As shown, the handle 4 includes a stop block 41, a wire pressing block 42 and a hammer part 43. The wire pressing block 42 is located between the stop block 41 and the hammer part 43 and can slide elastically.

[0047] It should be noted that the preferred way for the wire pressing block 42 of this embodiment to achieve elastic sliding is as Figure 4 , Figure 5 shown. The handle 4 further includes a central column 40 fixedly connected to the push rod 3. The central column 40 is slidably connected to the wire pressing block 42, and a compression spring 420 is arranged between the central column 40 and the wire pressing block 42;

[0048] Specifically, when the suture 2 passes through the through hole 410 opened in the stop block 41, by pulling the wire pressing block 42, the wire pressing block 42 slides away from the stop block 41, and at this time the suture 2 can be freely pulled and arranged; after the suture 2 is completely passed through, the pulling force on the wire pressing block 42 is released. Under the elastic force of the compression spring 420, the wire pressing block 42 slides towards the stop block 41 and tightly abuts against the stop block 41 to press the suture 2, preventing the suture 2 from loosening and getting messy, which is convenient for the medical staff to arrange the operation.

[0049] As Figure 3 shown is the state diagram of the suture 2 when it is not used in surgery. Combining Figure 4 , Figure 5 shown, that is, during assembly, the rear end 12 of the device body 1 is inserted and connected to the push rod 3 of the surgical implantator. The suture 2 extending from the front end 11 of the device body 1 passes through the through hole 410 opened in the stop block 41, the wire pressing block 42 is pulled open, wound around and arranged on the tail of the hammer part 43 of the surgical implantator, and finally the wire pressing block 42 is released. Under the action of the compression spring 420, the arranged suture 2 is pressed to prevent the suture 2 from getting messy, which is convenient for the medical staff to arrange the operation.

[0050] During the surgical operation, after the suture 2 is taken out from the handle 4 of the surgical implantator, the suture 2 is hooked by a suture hook and introduced into the opened bone tunnel and pulled out. The device body 1 is introduced into the region of the fibrocartilage injury and tear. While tightening the suture 2, the tail of the handle 4 of the surgical implantator is hammered with a hammer. Since a plurality of annular stepped protrusions 14 are arranged on the outer surface of the middle part 13 of the device body 1, and the maximum radial diameter of the plurality of annular stepped protrusions 14 gradually increases in sequence along the direction from the front end 11 to the rear end 12, the device body 1 is stably hammered and fixed in the bone tunnel of the injury and tear region, having the beneficial effects of simple and reasonable structural design and convenient surgical operation.

[0051] As a preferred embodiment, as Figure 3As shown, a marked depth scale 30 is provided on the outer surface of the push rod 3, facilitating real-time observation of the pushing depth of the push rod during surgical operations.

[0052] In summary, the present application provides a novel fixing device for repairing knee joint fibrocartilage. By providing a plurality of annular stepped protrusions 14 on the surface of the middle part 13 of the device body 1, and the maximum radial diameters of the plurality of annular stepped protrusions 14 gradually increase in sequence from the front end to the rear end, free natural fixation is achieved during the process of hammering in the fixing device. Further, by providing a retaining convex 15 between the annular stepped protrusion 14 and the rear end 12, over-hammering of the device body 1 is prevented, avoiding the occurrence of surgical risks. It has the beneficial effects of simple and reasonable structural design and convenient surgical operation.

[0053] The above description shows and describes the preferred embodiments of the present application. However, as mentioned before, it should be understood that the present application is not limited to the form disclosed herein. It should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications, and environments, and can be changed within the scope of the conceptions herein through the above teachings or the technology or knowledge in related fields. Any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present application shall fall within the protection scope of the appended claims of the present application.

Claims

1. A fixation device for repairing fibrocartilage of knee joint, characterized in that: It comprises a device body having a hollow structure and a suture thread inserted and connected in the hollow structure; The device body includes a front end, a rear end, and a middle part located between the front end and the rear end, and a plurality of annular step protrusions are arranged on the outer surface of the middle part, and the maximum radial diameters of the plurality of annular step protrusions gradually increase from the front end to the rear end; a stop protrusion is arranged on the outer surface of the middle part close to the rear end, and the stop protrusion is located between the annular step protrusion and the rear end.

2. The fixation device for repairing fibrocartilage of knee joint according to claim 1, characterized in that: A groove is provided on the end surface of the rear end of the device body, and a through hole for passing the suture thread is provided on the bottom of the groove.

3. The fixation device for repairing fibrocartilage of knee joint according to claim 2, characterized in that: One end of the suture is knotted to form a knotted ball, and the knotted ball is placed in the groove, and the other end passes through the hollow structure and then extends out from the front end.

4. The fixation device for repairing fibrocartilage of knee joint according to claim 3, characterized in that: The suture line comprises a knotting section and a suturing section, the knotting section comprises the knotted ball and a connecting ring formed by knotting, and the suturing section is threaded and connected to the connecting ring.

5. The fixation device for repairing fibrocartilage of knee joint according to claim 1, characterized in that: The axial cross section of the annular stepped protrusion is trapezoidal.

6. The fixation device for repairing fibrocartilage of knee joint according to claim 1, characterized in that: The radial diameter of the retaining protrusion is greater than the maximum radial diameter of any of the annular step protrusions.

7. A surgical implant, comprising a push rod and a handle, characterized in that: It also includes the fixing device for repairing fibrocartilage of the knee joint according to any one of claims 1 to 6, comprising a device body with a hollow structure and a suture thread inserted and connected in the hollow structure; the device body comprises a front end, a rear end, and a middle part located between the front end and the rear end, a plurality of annular step protrusions are arranged on the outer surface of the middle part, and the maximum radial diameters of the plurality of annular step protrusions gradually increase from the front end to the rear end; a stop protrusion is arranged on the outer surface of the middle part close to the rear end, and the stop protrusion is located between the annular step protrusion and the rear end; One end of the propulsion rod is detachably connected to the rear end of the device body, and the other end is connected to the handle.

8. The surgical implant according to claim 7, characterized in that: The outer surface of the push rod is provided with a depth scale.

9. The surgical implant according to claim 7, characterized in that: The handle comprises a stopper, a wire pressing block and a hand hammer portion, wherein the wire pressing block is located between the stopper and the hand hammer portion and can slide elastically.

10. The surgical implant according to claim 9, characterized in that: A through hole is axially provided on the stopper, and the suture thread passes through the through hole. The suture thread is pressed and arranged by the elastic sliding of the thread pressing block.

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