Distal tibiofibular syndesmosis injury fixing device and use method

Abstract

The invention relates to a distal tibiofibular joint injury fixing device and a using method, and belongs to the technical field of medical instruments.The distal tibiofibular joint injury fixing device comprises a fixing plate, a cable and a plug, the cable is a structural part formed by a titanium wire, the cable comprises a hanging ring part, a double-strand part and a bifurcation part, the hanging ring part and the bifurcation part are arranged at the two ends of the double-strand part, and the plug is connected with the hanging ring part. A stud is arranged on the fixing plate, the hanging ring portion is hung on the stud in a sleeved mode, the stud is provided with a nut used for pressing the hanging ring portion, the plug is arranged at the end, away from the double-strand portion, of the forking portion to pre-tighten the cable, the structure is adopted, the double-strand portion formed by the cable has higher structural strength, the fracture risk is reduced, the hanging ring portion is pressed and fixed through the nut, and the cable is not prone to fracture. The cable and the fixing plate are connected more firmly, the cable made of the titanium wires has good elasticity, flexibility and plasticity, the cable is pre-tightened by connecting the forked part through the plug, the risk of creep relaxation is reduced, the cable is more suitable for movement and deformation of bones and tissues, and joint micro-movement is not limited.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a distal tibiofibular syndesmotic injury fixation device and a use method thereof. Background Art

[0002] Syndesmotic fixation is a surgical technique for ankle injuries, primarily used to repair damage to the distal tibiofibular syndesmosis. The syndesmosis is a micro-motion joint formed by the distal ends of the tibia and fibula, connected by ligaments. It is crucial for maintaining ankle stability. Traumatic tearing or rupture of these ligaments can lead to syndesmotic separation, a widening of the gap between the distal tibia and fibula, causing ankle instability, pain, and dysfunction. Surgical fixation is necessary to restore ankle stability.

[0003] Currently, there are two types of fixation for the tibiofibular syndesmosis: rigid fixation and elastic fixation. Rigid fixation generally uses cortical bone screws. The patient cannot walk in the short term after surgery to avoid screw breakage. A second surgery is required 10-12 weeks after surgery to remove the fixation. The advantage is that the fixation effect is reliable and can effectively maintain the position of the tibiofibular syndesmosis. The disadvantage is that the tibiofibular syndesmosis is a micro-motion joint, and screws may limit joint movement, and there is a risk of screw loosening and breakage. Elastic fixation currently includes suture fixation Endobutton, steel plate fixation Suture-button, etc. The fixation strength is poor and there is a risk of creep relaxation.

[0004] Therefore, a distal tibiofibular syndesmotic injury fixation device and a method of use that has elastic connection, higher fixation strength, and less bone damage are in urgent need of development. Summary of the Invention

[0005] The present invention provides a distal tibiofibular syndesmotic injury fixation device and a method of use, which are used to solve the technical problems in the prior art of distal tibiofibular syndesmotic fixation devices that restrict joint micro-movement due to high rigidity or loosen due to creep, thereby affecting the fixation effect.

[0006] The present invention is achieved through the following technical solution: a distal tibiofibular syndesmotic injury fixation device, including a fixing plate, a cable and a plug, the cable is a structural member formed by a titanium wire, the cable includes a hanging ring part, a double-strand part and a fork part, the hanging ring part and the fork part are arranged at both ends of the double-strand part, the fixing plate is provided with a stud, the hanging ring part is hung on the stud, the stud is provided with a nut for tightening the hanging ring part, and the plug is arranged at one end of the fork part away from the double-strand part to pre-tighten the cable.

[0007] In order to better realize the present invention, further optimization is made in the above structure. The middle part of the titanium wire is bent to form the hanging loop part, and the two ends of the titanium wire are twisted together near the hanging loop part to form the double-strand part, and the ends of the titanium wire away from the double-strand part are the fork parts.

[0008] In order to better implement the present invention, further optimization is made in the above structure, and the diameter of the titanium wire is 1.3 mm.

[0009] In order to better implement the present invention, further optimization is made in the above structure, and the length of the double-stranded part is 30 mm.

[0010] In order to better implement the present invention, further optimization is made in the above structure, and the fixing plate is a circular plate, and the diameter of the fixing plate is 6 mm.

[0011] In order to better realize the present invention, further optimization is made in the above structure. The plug is provided with a first circular hole and a second circular hole, the first circular hole and the second circular hole are arranged side by side, one end of the fork portion passes through the first circular hole from one end of the plug, and the other end of the fork portion passes through the second circular hole from the other end of the plug.

[0012] In order to better implement the present invention, further optimization is made in the above structure, the diameter of the plug is 6 mm, and the apertures of the first circular hole and the second circular hole are 1.4 mm.

[0013] In order to better implement the present invention, further optimization is made in the above structure, and the fixing plate, plug and nut are all titanium metal structural parts.

[0014] In order to better implement the present invention, further optimization is made in the above structure, and anti-slip teeth are provided on the edge of the plug.

[0015] A method for using a distal tibiofibular syndesmotic injury fixation device, comprising:

[0016] Step 1: Use a cable hook to guide the cable through the bone tunnels on the tibia and fibula in sequence, with the bone tunnels 20-40 mm away from the lower articular surfaces of the tibia and fibula, so that the fixation plate fits on one side of the tibia;

[0017] Step 2: Pass the two ends of the forked portion of the cable through the first circular hole and the second circular hole of the plug, respectively, and use the knob of the tightener to pre-tighten the two ends of the forked portion to straighten the cable so that the plug is pressed against the fibula;

[0018] Step 3: Use the jaws of a tightener to compress the plug so that the two ends of the fork are respectively stuck in the first circular hole and the second circular hole, and cut off the excess part of the fork extending out of the plug.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The distal tibiofibular syndesmotic injury fixation device provided by the present invention includes a fixing plate, a cable and a plug. The cable is a structural member formed by a titanium wire. The cable includes a hanging ring part, a double-strand part and a fork part. The hanging ring part and the fork part are arranged at both ends of the double-strand part. A stud is provided on the fixing plate, and the hanging ring part is hung on the stud. The stud is provided with a nut for tightening the hanging ring part. The plug is arranged at one end of the fork away from the double-strand part to pre-tighten the cable. With this structure, the double-strand part formed by the cable has higher structural strength and reduces the risk of breakage. The hanging ring part is tightened and fixed by the nut, so that the cable and the fixing plate are more securely connected. The cable made of titanium wire has good elasticity, flexibility and plasticity. The fork part is connected with the plug to pre-tighten the cable, which reduces the risk of creep relaxation, is more adaptable to the movement and deformation of bones and tissues, and will not restrict joint micro-movement.

[0021] The present invention also provides a method for using the distal tibiofibular syndesmotic injury fixation device, comprising:

[0022] Step 1: Use a cable hook to guide the cable through the bone tunnels on the tibia and fibula in sequence, with the bone tunnels 20-40 mm away from the lower articular surfaces of the tibia and fibula, so that the fixation plate fits on one side of the tibia;

[0023] Step 2: Pass the two ends of the forked portion of the cable through the first circular hole and the second circular hole of the plug, respectively, and use the knob of the tightener to pre-tighten the two ends of the forked portion to straighten the cable so that the plug is pressed against the fibula;

[0024] Step 3: Use the jaws of a tightener to compress the plug so that the two ends of the fork are respectively stuck in the first circular hole and the second circular hole, and cut off the excess part of the fork extending out of the plug.

[0025] This method forms an elastic connection between the tibia and fibula through the distal tibiofibular syndesmotic injury fixation device, allowing the joint to move slightly within a certain range, maximally retaining the joint's physiological function, avoiding the traditional rigid fixation that completely restricts joint movement, promoting cartilage and ligament repair, making the operation easier, and the preload force controllable and adjustable, reducing the risk of creep relaxation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 1 is a schematic structural diagram of the distal tibiofibular syndesmotic injury fixation device of the present invention;

[0028] Figure 2 is a schematic diagram of the forked portion of the cable passing through the plug in the present invention;

[0029] Figure 3 Schematic diagram of the distal tibiofibular syndesmotic injury fixation device of the present invention connecting the tibia and fibula.

[0030] In the picture:

[0031] 1-Fixed plate; 2-Cable; 3-Plug; 4-Hanging ring; 5-Double-strand part; 6-Bifurcation part; 7-Stud; 8-Nut; 9-First circular hole; 10-Second circular hole. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that, unless otherwise specified, the term "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention depending on the specific circumstances.

[0035] Example 1:

[0036] In this embodiment, a distal tibiofibular syndesmotic injury fixation device is provided. Figures 1 to 3As shown, it includes a fixing plate 1, a cable 2 and a plug 3. Specifically, the cable 2 is a structural member formed by a titanium wire. The cable 2 is used to connect the tibia and fibula in series to provide an elastic connection. The fixing plate 1 and the plug 3 are used to be limited on the outside of the tibia and fibula respectively. The cable 2 includes a hanging ring part 4, a double-strand part 5 and a fork part 6. The hanging ring part 4 and the fork part 6 are respectively arranged at both ends of the double-strand part 5, wherein a stud 7 is provided at the center position of the fixing plate 1, the hanging ring part 4 is hung on the stud 7, and the end of the stud 7 is provided with a nut 8 for tightening the hanging ring part 4, and the plug 3 is arranged at the end of the fork part 6 away from the double-strand part 5 to pre-tighten the cable 2.

[0037] With this structure, the double-stranded portion 5 formed by the cable 2 has higher structural strength, reducing the risk of breakage. The hanging ring portion 4 is compressed and fixed by the nut 8, so that the cable 2 is more securely connected to the fixing plate 1. The cable 2 made of the titanium wire has good elasticity, flexibility and plasticity. The fork portion 6 is connected through the plug 3 to pre-tighten the cable 2, reducing the risk of creep relaxation of the cable 2, and is more adaptable to the movement and deformation of bones and tissues, and will not restrict joint micro-movement.

[0038] As a specific implementation of this embodiment, Figure 1 As shown, the middle part of the titanium wire is bent to form the hanging loop portion 4, and then the two ends of the titanium wire are intertwined near the position of the hanging loop portion 4 to form the double-strand portion 5, and the two ends of the titanium wire away from the double-strand portion 5 are the fork portion 6, that is, the part where the two ends of the titanium wire are not intertwined with each other forms the fork portion 6. The fork portion 6 is convenient for tightening by a tightener, so that the cable 2 is straightened, and then locked in position by the plug 3 to ensure that the plug 3 is limited to the outside of the fibula.

[0039] In this embodiment, the diameter of the titanium wire is 1.3 mm, the maximum diameter of the double-stranded portion 5 is 2.6 mm, and the diameter of the bone holes drilled on the tibia and fibula is 3 mm, ensuring that the cable 2 can pass through them smoothly to elastically connect the tibia and fibula.

[0040] Furthermore, the length of the double-stranded portion 5 is preferably 30 mm, which can withstand greater stress.

[0041] In this embodiment, the fixing plate 1 is a circular plate with a diameter of 6 mm, ensuring that the fixing plate 1 has enough area to press against the outer side of the tibia, thereby improving stability.

[0042] In this embodiment, Figure 2As shown, the plug 3 is provided with a first circular hole 9 and a second circular hole 10, and the first circular hole 9 and the second circular hole 10 are arranged side by side, one end of the fork 6 passes through the first circular hole 9 from one end of the plug 3, and the other end of the fork 6 passes through the second circular hole 10 from the other end of the plug 3. At this time, a tightener is used to tighten the two ends of the fork 6 to straighten the cable 2, and the variable of the micro-motion of the cable 2 is adjusted by adjusting the tension by the tightener, so that the tibiofibular joint fixed by the distal tibiofibular syndesmotic injury fixation device has a certain range of movement. At the same time, the titanium wire has higher strength, which can avoid the defect of creep relaxation that is easy to occur in the cable 2 when using sutures.

[0043] In this embodiment, the diameter of the above-mentioned plug 3 is 6 mm, and the aperture of the above-mentioned first circular hole 9 and the second circular hole 10 is 1.4 mm. After the two ends of the above-mentioned fork 6 pass through the bone hole of the fibula, they will bend laterally, and one side passes through the above-mentioned first circular hole 9 and the second circular hole 10 respectively. This can avoid the defects of the above-mentioned fork 6 moving and loosening when going straight in and out, and ensure that the above-mentioned cable 2 will not rebound after being tightened by the tightener, and maintain the preset tension. The edge of the above-mentioned plug 3 is provided with anti-slip teeth to prevent slipping during operation.

[0044] In this embodiment, the fixing plate 1 , the plug 3 and the nut 8 are all titanium metal structural parts. Titanium metal has the advantages of biocompatibility, mechanical properties, chemical stability and imaging compatibility.

[0045] Example 2:

[0046] In this embodiment, a method for using a distal tibiofibular syndesmotic injury fixation device is provided. Figure 3 Shown, including

[0047] Step 1: Use a cable hook to guide the cable 2 through the bone tunnels on the tibia and fibula in sequence. The bone tunnels are 20-40 mm away from the lower articular surfaces of the tibia and fibula, so that the fixation plate 1 fits on one side of the tibia.

[0048] Step 2: Pass the two ends of the bifurcated portion 6 of the cable 2 through the first circular hole 9 and the second circular hole 10 of the plug 3, respectively. Use the knob of the tightener to pre-tighten the two ends of the bifurcated portion 6 to straighten the cable 2 so that the plug 3 is pressed against the fibula.

[0049] Step 3: Use the jaws of the tightener to compress the plug 3 so that the two ends of the fork 6 are respectively stuck in the first circular hole 9 and the second circular hole 10, and cut off the excess part of the fork 6 extending out of the plug 3.

[0050] This method forms an elastic connection between the tibia and fibula through the distal tibiofibular syndesmotic injury fixation device, allowing the joint to move slightly within a certain range, maximally retaining the joint's physiological function, avoiding the traditional rigid fixation that completely restricts joint movement, promoting cartilage and ligament repair, making the operation easier, and the preload force controllable and adjustable, reducing the risk of creep relaxation.

[0051] During operation step 2, the two ends of the forked portion 6 pass through the plug 3 and then come together, and then pass through the holes on the knob of the tightener together, and after locking, the knob is turned to tighten the cable 2.

[0052] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A fixation device for distal tibiofibular syndesmotic injury, characterized by: The invention comprises a fixing plate (1), a cable (2) and a plug (3), wherein the cable (2) is a structural member formed by a titanium wire, and the cable (2) comprises a hanging ring portion (4), a double-strand portion (5) and a forked portion (6), wherein the hanging ring portion (4) and the forked portion (6) are respectively arranged at two ends of the double-strand portion (5), a stud (7) is provided on the fixing plate (1), the hanging ring portion (4) is hung on the stud (7), and the stud (7) is provided with a nut (8) for pressing the hanging ring portion (4), and the plug (3) is arranged at one end of the forked portion (6) away from the double-strand portion (5) to pre-tighten the cable (2).

2. The distal tibiofibular syndesmotic injury fixation device according to claim 1, characterized in that: The middle portion of the titanium wire is bent to form the hanging loop portion (4), and the two ends of the titanium wire are intertwined near the hanging loop portion (4) to form the double-strand portion (5), and the ends of the titanium wire away from the double-strand portion (5) are the bifurcated portions (6).

3. The distal tibiofibular syndesmotic injury fixation device according to claim 2, characterized in that: The diameter of the titanium wire is 1.3 mm.

4. The distal tibiofibular syndesmotic injury fixation device according to claim 2, characterized in that: The length of the double-stranded portion (5) is 30 mm.

5. The distal tibiofibular syndesmotic injury fixation device according to claim 1, characterized in that: The fixing plate (1) is a circular plate, and the diameter of the fixing plate (1) is 6 mm.

6. The distal tibiofibular syndesmotic injury fixation device according to claim 1, characterized in that: The plug (3) is provided with a first circular hole (9) and a second circular hole (10), the first circular hole (9) and the second circular hole (10) are arranged side by side, one end of the fork portion (6) passes through the first circular hole (9) from one end of the plug (3), and the other end of the fork portion (6) passes through the second circular hole (10) from the other end of the plug (3).

7. The distal tibiofibular syndesmotic injury fixation device according to claim 6, characterized in that: The diameter of the plug (3) is 6 mm, and the apertures of the first circular hole (9) and the second circular hole (10) are 1.4 mm.

8. The distal tibiofibular syndesmotic injury fixation device according to claim 6, characterized in that: The fixing plate (1), plug (3) and nut (8) are all titanium metal structural parts.

9. The distal tibiofibular syndesmotic injury fixation device according to claim 6, characterized in that: The edge of the plug (3) is provided with anti-slip teeth.

10. A method for using the distal tibiofibular syndesmotic injury fixation device according to any one of claims 6 to 8, characterized in that: include Step 1, using a cable hook to guide the cable (2) through the bone tunnels on the tibia and fibula in sequence, the bone tunnels being 20-40 mm away from the lower articular surfaces of the tibia and fibula, so that the fixation plate (1) is attached to one side of the tibia; Step 2: Pass the two ends of the bifurcated portion (6) of the cable (2) through the first circular hole (9) and the second circular hole (10) of the plug (3) respectively, and use the knob of the tightener to pre-tighten the two ends of the bifurcated portion (6) to straighten the cable (2), so that the plug (3) is pressed against the fibula; Step 3, using the jaws of the tightener to compress the plug (3), so that the two ends of the fork (6) are respectively stuck in the first circular hole (9) and the second circular hole (10), and cutting off the excess part of the fork (6) extending out of the plug (3).

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