Adjustable distal tibiofibular syndesmosis reduction guider

Abstract

The utility model belongs to the technical field of distal tibiofibular reposition medical instruments, and particularly relates to an adjustable distal tibiofibular combined reposition guider. Comprising a hoop, a sliding groove is formed in the outer side wall of one hoop plate of the hoop, a sliding block is arranged in the sliding groove, a connecting plate is arranged on the outer side wall of the hoop, a first threaded hole is formed in the connecting plate, a first screw penetrates through the first threaded hole, a mounting plate is fixed to the inner side wall of the connecting plate, a limiting groove is formed in the mounting plate, and a positioning plate is embedded in the limiting groove; a pressurizing piece used for pressurizing the fibula is fixed to the top of the positioning plate, a fixing sleeve is fixed to the top of the pressurizing piece, a screw is in threaded connection with the interior of the fixing sleeve, a second threaded hole is formed in the bottom of the positioning plate, and a second screw is installed in the second threaded hole in a penetrating mode. And a pressurizing assembly for pressurizing the tibia is arranged on the other hoop plate of the hoop. According to the utility model, the screw placement angle can be well adjusted, and the combined reduction effect of the lower tibiofibula can be improved as much as possible.

Description

Technical Field

[0001] The utility model belongs to the technical field of distal tibiofibular joint reduction medical devices, in particular to an adjustable distal tibiofibular joint reduction guide. Background Art

[0002] The ankle joint, composed of the articular surfaces of the lower ends of the tibia and fibula and the talar trochlea, is a critical weight-bearing joint characterized by high stability and flexibility. The ligamentous system of the tibiofibular syndesmosis, along with the medial and lateral structures of the ankle, maintains the functional stability of the ankle. Ankle injuries are prone to syndesmotic injury. According to statistics, 17%-39% of Weber B ankle fractures are accompanied by tibiofibular separation, and nearly all Weber C ankle fractures are accompanied by syndesmotic injury. This can lead to distal tibiofibular separation, destabilizing the ankle joint. Improper treatment can lead to joint instability, ankle pain, and traumatic arthritis, significantly impacting patients' daily lives. Studies have shown that if the talus is displaced 1mm laterally, the contact area of ​​the tibiotalar joint decreases by 42%, exacerbating wear of the articular cartilage. Therefore, syndesmotic injuries, whether or not associated with an ankle fracture, require accurate reduction and fixation to prevent the development of long-term traumatic arthritis.

[0003] In clinical practice, the syndesmosis is often temporarily reduced and fixed using C-shaped clamps. The surgeon then uses experience to insert screws at an angle from posterior to anterior. The screws are optimally positioned 2-5 cm above the ankle joint on the coronal plane of the tibia, with the screw orientation at a 30° angle to the horizontal plane. Failure to do so may result in anterior-posterior displacement of the fibula. Traditional methods suffer from inaccurate screw placement angles, which can lead to deviations during insertion. Furthermore, the angle cannot be adjusted appropriately based on the patient's position and specific circumstances during surgery, compromising syndesmotic reduction and fixation. Furthermore, this surgical method requires a high level of surgeon experience and a long learning curve. Screw fixation requires intraoperative C-arm X-ray fluoroscopy. Therefore, an adjustable syndesmotic reduction guide is needed to improve the accuracy of syndesmotic screw placement, reduce intraoperative X-ray exposure, and enhance surgical safety. Utility Model Content

[0004] The purpose of the utility model is to provide an adjustable tibiofibular syndesmosis reduction guide, which can better adjust the screw insertion angle and improve the effect of tibiofibular syndesmosis reduction as much as possible.

[0005] The adjustable tibiofibular joint reduction guide comprises a clamp, a clamping hoop, a sliding groove is provided on the outer wall of a clamping plate of the clamp, a sliding block slidingly matched with the sliding groove is provided in the sliding groove, a connecting plate connected to the sliding block is provided on the outer wall of the clamping hoop, a first threaded hole is provided on the connecting plate, a first screw threadedly matched with the first screw is passed through the first threaded hole, a mounting plate is fixed on the inner wall of the connecting plate, a limiting groove which is connected to the upper and lower parts and has an arc structure, a positioning plate with an "I"-shaped structure is embedded in the limiting groove, a pressure piece for applying pressure to the fibula is fixed on the top of the positioning plate, a fixing sleeve is fixed on the top of the pressure piece, a screw for resetting and fixing is threadedly connected to the fixing sleeve, a second threaded hole is provided on the bottom of the positioning plate, a second screw is passed through the second threaded hole, a positioning rod is provided on the mounting plate, and a pressure component for applying pressure to the tibia is provided on the other clamping plate of the clamp.

[0006] Furthermore, the pressurizing assembly includes a pressurizing sleeve fixed on the clamp, the inner thread of the pressurizing sleeve is connected to a second threaded rod, one end of the second threaded rod is fixed with a knob, and the other end of the second threaded rod is rotatably connected to a second pressurizing plate.

[0007] Furthermore, a cushion layer is provided on the second pressure plate.

[0008] Furthermore, the cushion layer is made of silicone material.

[0009] Furthermore, a moving block located in a limiting groove is provided on the top of one end of the positioning rod, a limiting plate is fixed on the top of the moving block, a third threaded hole is opened on the limiting plate, and a third screw threadedly matched with the third threaded hole is installed in the third threaded hole.

[0010] Furthermore, angle scale lines are provided on the top of the mounting plate.

[0011] Furthermore, a pointing block for pointing to the angle scale line is fixed on the limiting plate.

[0012] Furthermore, a protective layer is provided on the inner wall of the clamp.

[0013] Furthermore, the protective layer is made of latex material.

[0014] Furthermore, the top height of the connecting plate is lower than the bottom height of the pressurizing member.

[0015] Furthermore, the connecting plate has an arc-shaped structure, and the connecting plate fits closely with the hoop.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The utility model fixes the clamp on the affected limb, presses the tibia through the pressure component, rotates the positioning rod to contact the ankle joint, and then moves the position of the pressure piece. When the angle between the pressure piece and the positioning rod is 30 degrees, the position is fixed, and the pressure piece is used to press the tibia, and then the screw is inserted into the distal tibia and fibula. The screw insertion angle can be well adjusted to improve the effect of the distal tibia and fibula joint reduction as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the utility model;

[0019] Figure 2 for Figure 1 A top view of

[0020] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of AA;

[0021] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0022] Figure 5 This is a state diagram for the use of the utility model;

[0023] The names of the components in the figure are: 1. Clamp 2. Pad 3. Knob 4. Second threaded rod 5. Pressurization sleeve 6. Second pressure plate 7. Protective layer 8. Mounting plate 9. Connecting plate 10. Limiting groove 11. First screw 12. Fixing sleeve 13. Limiting plate 14. Pointing block 15. Positioning rod 16. Slide groove 17. Slider 18. Second screw 19. Positioning plate 20. First threaded rod 21. Sleeve 22. Screw 23. Third screw 24. First pressure plate 25. Moving block. DETAILED DESCRIPTION

[0024] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings, but this does not limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0025] Example 1

[0026] The adjustable tibiofibular syndesmotic reduction guide described in this embodiment is as follows: Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown, it includes a hoop 1, a slide groove 16 is provided on the outer wall of a hoop plate of the hoop 1, a slider 17 is provided in the slide groove 16 to slide with it, a connecting plate 9 connected to the slider 17 is provided on the outer wall of the hoop 1, a first threaded hole is provided on the connecting plate 9, a first screw 11 is threadedly fitted therein, a mounting plate 8 is fixed to the inner wall of the connecting plate 9, a limiting groove 10 which is connected to the upper and lower parts and has an arc-shaped structure is provided on the mounting plate 8, a positioning plate 19 with an "I"-shaped structure is embedded in the limiting groove 10, a pressure piece for pressurizing the fibula is fixed on the top of the positioning plate 19, a fixing sleeve 12 is fixed on the top of the pressure piece, and the fixing sleeve 12 is threadedly connected to a pressure piece for resetting The fixing screw 22 is provided with a second threaded hole at the bottom of the positioning plate 19, and a second screw 18 is installed in the second threaded hole. The holding hoop 1 holding hoop device is composed of a hoop plate, a wing plate, a tie plate, a bolt and an inner liner. It is formed by hingedly joining the left and right half hoop plates. The left and right half hoop plates are both semicircular, with the ends of the semicircular ring bent outward to form a mounting ear. The mounting ears are provided with threaded holes, and a bolt is installed in the threaded hole to fix the holding hoop 1 on the affected limb; a slide groove 16 is provided on the outer wall of one of the hoop plates of the holding hoop 1, and a slider 17 is provided in the slide groove 16. A connecting plate 9 is provided on the outer wall of the holding hoop 1, and the slider 17 is welded or glued to the side wall of the connecting plate 9. Through the slider 17 and the slide groove 1 6 makes the connecting plate 9 move on the hoop 1, and a first threaded hole is provided on the connecting plate 9, and a first screw 11 is installed in the first threaded hole. The top tightening end of the first screw 11 presses against the inner wall of the slide groove 16, thereby fixing the position of the connecting plate 9. The height of the top of the hoop 1 is lower than the height of the top of the connecting plate 9. The inner side wall of the connecting plate 9 protruding from the top of the hoop 1 is fixed with a mounting plate 8. The inner side wall of the connecting plate 9 is welded or glued with a mounting plate 8. A limiting groove 10 is provided on the mounting plate 8, and a positioning plate 19 is embedded in the limiting groove 10. The pressure member includes a sleeve 21 welded or glued to the top of the positioning plate 19. The sleeve 21 is threadedly connected to a first threaded rod 20, and one end of the first threaded rod 20 is useful for rotation connection. The first pressure plate 24 for applying pressure to the fibula has a handle fixed to its other end for driving the first threaded rod 20 to rotate. By rotating the handle, the first threaded rod 20 is driven to move in the sleeve 21, thereby driving the first pressure plate 24 to approach the fibula and apply pressure to it; a fixing sleeve 12 is welded or adhered to the top of the sleeve 21, and a screw 22 is connected to the inner thread of the fixing sleeve 12, so that the screw 22 is inserted into the distal tibia and fibula to be reset and fixed. This significantly reduces the shaking of the screw 22 during the insertion process, thereby improving the stability and accuracy of the screw 22 during the insertion process, improving the stability of the pressure applied to the distal tibiofibular syndesmosis, and improving the reduction and fixation effect of the distal tibiofibular syndesmosis;A second screw 18 threadedly engaged with the second threaded hole at the bottom of the positioning plate 19 is installed. The tightening end of the second screw 18 presses against the bottom of the mounting plate 8, thereby fixing the position of the positioning plate 19. When the positioning plate 19 moves along the arc-shaped limiting groove 10, the positioning plate 19 drives the sleeve 21 and the fixing sleeve 12 to move, thereby adjusting the insertion position of the screw 22 according to the position of the lower tibia and fibula, which is beneficial to improving the effect of reduction and fixation of the lower tibia and fibula.

[0027] A positioning rod 15 is provided on the mounting plate 8, and the positioning rod 15 is hinged at the bottom of the mounting plate 8. The positioning rod 15 swings around the hinge point. A fourth threaded hole is provided on the positioning rod 15, and a fourth screw is installed in the fourth threaded hole to threadably match the fourth screw. The tightening end of the fourth screw presses against the bottom of the mounting plate 8, thereby limiting the swing direction of the positioning rod 15. The angle between the positioning rod 15 and the fixing sleeve 12 can be adjusted so that the screw 22 is at a 30° angle forward to the horizontal plane of the lower tibia and fibula, so that the insertion angle of the screw 22 is more accurate.

[0028] A pressure assembly for pressurizing the tibia is provided on the other hoop plate of the clamp 1. The pressure assembly includes an electric push rod installed on the top of the hoop plate. The movable end of the electric push rod is welded or adhered with a pressure plate. The electric push rod is powered by a button battery. The button battery is installed on the hoop plate. When the push rod of the electric push rod is extended or retracted, the pressure plate is driven to pressurize the tibia. The pressure assembly is located at the tibia and in contact with the patient's skin. The electric push rod pushes the pressure plate to pressurize the tibia stably and smoothly, making it less likely for the tibia to slide and dislocate, avoiding excessive or deviation of the tibia during the reduction process, and better reducing and fixing the lower tibia and fibula.

[0029] like Figure 1 、 Figure 3 and Figure 5 As shown, the inner wall of the hoop 1 is provided with a protective layer 7, which is made of latex material. The latex is soft and comfortable, has good air permeability and durability, is non-deformable, washable, durable, and effectively prevents the breeding of dust mites and bacteria. When the hoop 1 is fixed on the affected limb, the latex protects the affected limb;

[0030] like Figure 3 and Figure 4 As shown, the top height of the connecting plate 9 is lower than the bottom height of the pressure piece, and the top height of the connecting plate 9 is lower than the bottom height of the sleeve 21 in the pressure piece, so that medical staff can better pressurize the fibula and prevent it from deflecting during the insertion of the screw 22;

[0031] like Figure 1 and Figure 5As shown, the connecting plate 9 has an arc-shaped structure, the connecting plate 9 fits with the clamp 1, and the inner wall of the connecting plate 9 fits with the outer wall of the clamp 1, so that it moves more smoothly on the clamp 1 and the position of the screw 22 is better adjusted.

[0032] During actual use, the clamp 1 is fixed on the affected limb, the tibia is pressed and tightened by the pressure component, the positioning rod 15 is rotated to make it fit with the ankle joint, and then the positioning plate 19 is moved to make it move in the limit groove 10, so that the connecting plate 9 is close to the fibula, which is convenient for adjusting the position of the pressure piece. When the angle between the pressure piece and the positioning rod 15 is 30 degrees, the second screw 18 is tightened to fix the pressure piece, and then the tibia is tightened by the pressure piece. By applying pressure to the tibia and fibula, the screw 22 is inserted into the lower tibia and fibula through the fixing sleeve 12 to reduce and fix them, which is beneficial to improve the effect of reduction and fixation of the lower tibia and fibula.

[0033] Example 2

[0034] This embodiment further illustrates the technology. Figure 1 and Figure 5 As shown, the pressure assembly includes a pressure sleeve 5 fixed on the clamp 1, the pressure sleeve 5 is internally threaded with a second threaded rod 4, one end of the second threaded rod 4 is fixed with a knob 3, and the other end of the second threaded rod 4 is rotatably connected to the second pressure plate 6, the pressure sleeve 5 is welded or glued to the top of the hoop plate of the clamp 1, and an internal thread is opened in the pressure sleeve 5, and the pressure sleeve 5 is internally threaded with a second threaded rod 4, and the second threaded rod 4 is rotatably connected to the second pressure plate 6 on one end facing the inside of the clamp 1. When the rotation connection scheme is specifically implemented, a countersink is opened on the outer wall of the second pressure plate 6, and a bearing is installed in the countersink. The outer ring of the bearing is welded to the inner wall of the countersink, and the inner ring of the bearing is welded to the end of the second threaded rod 4. The second threaded rod 4 is rotatably connected to the second pressure plate 6 by using the bearing, and the second threaded rod 4 is welded or glued to the outer end of the clamp 1. When in use, the knob 3 is turned to rotate the second threaded rod 4 to move in the pressure sleeve 5, thereby driving the second pressure plate 6 to approach the tibia, and the second pressure plate 6 pushes the tibia to approach the fibula. The threaded cooperation between the pressure sleeve 5 and the second threaded rod 4 makes the pressure speed more stable and steady, and the pressure speed can be adjusted to apply uniform pressure to the tibia, which can avoid excessive correction or deviation of the tibia during the reduction process, and further improve the effect of reduction and fixation of the lower tibia and fibula; a pad layer 2 is provided on the second pressure plate 6, and the pad layer 2 is made of silicone material. The silicone is medical silicone, which is soft and comfortable, has good resilience, can adapt to the curves and changes of the human body, and better fits the patient's skin, making it more stable when pushing the tibia, and the surface of the medical silicone is not easy to breed bacteria, has certain antibacterial ability, and helps to reduce the risk of infection.

[0035] Example 3

[0036] This embodiment further illustrates the technology. Figure 1 、 Figure 3 、 Figure 4 and Figure 5 The third screw 23 is threadedly mounted in the third threaded hole, and the top of the third screw 23 is screwed in the top of the fixing plate 8. When the fixing plate 8 is in use, the third screw 23 is loosened, so that the limiting plate 13 drives the moving block 25 to move in the limiting groove 10. The moving block 25 drives the positioning rod 15 to move along the limiting groove 10 of the arc structure, so that the positioning rod 15 fits the ankle joint. The angle between the positioning rod 15 and the fixing sleeve 12 can adjust the angle of the screw 22, making the screw 22 more accurately inserted; and the top of the mounting plate 8 is printed with an angle scale line, and the mounting plate 8 is a semicircular structure, so that medical staff can intuitively view the degree of the angle between the positioning rod 15 and the fixing sleeve 12, and more intuitively view the angle between the positioning rod 15 and the screw 22, and a pointing block 14 for pointing to the angle scale line is fixed on the limiting plate 13, and a pointing block 14 is welded or adhered to the side wall of the limiting plate 13. The pointing block 14 is a triangular structure, and the angle scale line is pointed by the pointing block 14, and the angle pointing of the positioning rod 15 can be accurately obtained. Similarly, a pointing block 14 is also fixed on the fixing sleeve 12. By pointing the two pointing blocks 14, the degree of the angle between the fixing sleeve 12 and the positioning rod 15 can be more accurately understood, which is convenient for adjusting the angle of the screw 22.

Claims

1. An adjustable syndesmotic reduction guide, comprising a hoop (1), characterized in that: A sliding groove (16) is provided on the outer wall of a hoop plate of the hoop (1), a slider (17) which is in sliding engagement with the sliding groove (16) is provided in the sliding groove (16), a connecting plate (9) which is connected to the slider (17) is provided on the outer wall of the hoop (1), a first threaded hole is provided on the connecting plate (9), a first screw (11) which is in thread engagement with the connecting plate (17) is passed through the first threaded hole, a mounting plate (8) is fixed on the inner wall of the connecting plate (9), a limiting groove (10) which is in an arc-shaped structure and is communicated with each other from top to bottom is provided on the mounting plate (8), and the limiting groove (10) ) is embedded with a positioning plate (19) in an "I"-shaped structure, a pressure piece for pressurizing the fibula is fixed on the top of the positioning plate (19), a fixing sleeve (12) is fixed on the top of the pressure piece, and a screw (22) for resetting and fixing is connected to the internal thread of the fixing sleeve (12), a second threaded hole is opened at the bottom of the positioning plate (19), a second screw (18) is passed through the second threaded hole, a positioning rod (15) is provided on the mounting plate (8), and a pressure component for pressurizing the tibia is provided on the other hoop plate of the clamp (1).

2. The adjustable distal tibiofibular syndesmotic reduction guide according to claim 1, characterized in that: The pressurizing assembly comprises a pressurizing sleeve (5) fixed on the clamp (1); the pressurizing sleeve (5) is internally threadedly connected to a second threaded rod (4); a knob (3) is fixed to one end of the second threaded rod (4); and the other end of the second threaded rod (4) is rotatably connected to a second pressurizing plate (6).

3. The adjustable tibiofibular syndesmotic reduction guide according to claim 2, wherein: A cushion layer (2) is provided on the second pressure plate (6).

4. The adjustable distal tibiofibular syndesmotic reduction guide according to claim 3, characterized in that: The cushion layer (2) is made of silica gel material.

5. The adjustable distal tibiofibular syndesmotic reduction guide according to claim 1, characterized in that: A moving block (25) located in the limiting groove (10) is provided at the top of one end of the positioning rod (15), a limiting plate (13) is fixed on the top of the moving block (25), a third threaded hole is opened on the limiting plate (13), and a third screw (23) threadedly matched with the third threaded hole is installed in the third threaded hole.

6. The adjustable distal tibiofibular syndesmotic reduction guide according to claim 1, characterized in that: Angle scale lines are provided on the top of the mounting plate (8).

7. The adjustable distal tibiofibular syndesmotic reduction guide according to claim 6, characterized in that: A pointing block (14) for pointing to the angle scale line is fixed on the limiting plate (13).

8. The adjustable distal tibiofibular syndesmotic reduction guide according to claim 1, characterized in that: The inner wall of the clamp (1) is provided with a protective layer (7).

9. The adjustable distal tibiofibular syndesmotic reduction guide according to claim 8, characterized in that: The protective layer (7) is made of latex material.

10. The adjustable distal tibiofibular syndesmotic reduction guide according to claim 1, characterized in that: The top height of the connecting plate (9) is lower than the bottom height of the pressurizing member.

11. The adjustable distal tibiofibular syndesmotic reduction guide according to claim 1, characterized in that: The connecting plate (9) is an arc-shaped structure, and the connecting plate (9) fits closely with the hoop (1).

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