A tibiofibular joint reduction and fixation guide for foot and ankle surgery

Abstract

The utility model discloses a kind of foot and ankle surgery lower tibiofibular joint reduction fixed guider, belong to foot and ankle surgery technical field, for solving the problem of secondary finding in the process of pressurization fixation. The lower tibiofibular joint reduction fixed guider of this foot and ankle surgery includes first guide arm, second guide arm and adjusting structure, and first guide arm proximal end has first guide hole;Second guide arm proximal end has second guide hole, and the distal end of second guide arm is slidably connected with the distal end of first guide arm, second guide hole is coaxially arranged with first guide hole, for guiding kirschner wire to pass through tibia and fibula;Adjusting structure is used to control the position between first guide arm and second guide arm. The lower tibiofibular joint reduction fixed guider of this foot and ankle surgery avoids the problem of secondary finding and fixation in the process of conventional tibiofibular pressurization fixation, avoids the error in secondary finding process, not only accelerates surgical process, saves operation step, and make the treatment effect of pressurization fixation better.

Description

Technical Field

[0001] This utility model relates to the field of foot and ankle surgery technology, specifically to a foot and ankle surgery tibiofibular joint reduction and fixation guide. Background Technology

[0002] The distal tibiofibular syndesmosis ligament is a core structure for maintaining the normal distance between the distal tibia and fibula and for ankle joint stability. Fibular fractures (especially high fractures or those with accompanying ligament injuries) easily lead to tibiofibular separation, and simply fixing the fibula with a plate cannot fully restore the mechanical stability of the ankle joint, easily causing ankle instability and abnormal movement. Compression fixation, on the other hand, can mechanically reduce the tibiofibular space, restoring its physiological distance and preventing long-term traumatic arthritis or joint degeneration.

[0003] Currently, the typical procedure during compression is to locate the fixation position and then use reduction forceps to clamp the tibia and fibula to maintain their normal physiological distance. The angle and position are then re-established on the tibia and fibula, and Kirschner wires are passed through sequentially to achieve long-term fixation of the physiological distance between the tibia and fibula. Finally, the reduction forceps are removed. This process involves two rounds of accurate fixation, which introduces errors during the surgery, affecting the effectiveness of the compression fixation and prolonging the operation time. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems in the prior art and provide a guide device for reducing and fixing the distal tibiofibular joint in foot and ankle surgery. This device avoids the problems of secondary alignment and fixation during conventional compression fixation of the distal tibiofibular joint, avoids errors in the secondary alignment process, not only speeds up the surgical process and saves operation steps, but also makes the treatment effect of compression fixation better.

[0005] This invention provides a foot and ankle surgical tibiofibular joint reduction and fixation guide, comprising a first guide arm, a second guide arm, and an adjustment structure. The first guide arm has a first guide hole at its proximal end; the second guide arm has a second guide hole at its proximal end, and the distal end of the second guide arm is slidably connected to the distal end of the first guide arm. The second guide hole and the first guide hole are coaxially arranged to guide Kirschner wires through the tibia and fibula. An adjustment structure is provided between the first guide arm and the second guide arm to control the relative position between the first guide arm and the second guide arm, so that the proximal ends of the first guide arm and the second guide arm can jointly clamp the tibia and fibula.

[0006] The proximal end refers to the end closest to the skin, while the distal end refers to the end furthest from the skin.

[0007] Preferably, the first guide arm has a sliding hole at the end away from the first guide hole, and the second guide arm passes through the sliding hole; the adjustment structure is provided on the first guide arm and is used to control the second guide arm to slide along the length direction of the sliding hole.

[0008] Preferably, the adjustment structure includes a rotating drum and a slider. The rotating drum is rotatably mounted on the first guide arm, and the inner wall of the rotating drum is provided with the helical slider. The surface of the second guide arm is provided with a helical groove, and the slider is slidably mounted in the helical groove. Rotating the rotating drum drives the second guide arm to slide along the length direction of the sliding hole through the slider.

[0009] The spiral groove here is actually a part of the complete spiral groove. More specifically, the spiral groove 8 is a partial projection of the end face of the complete spiral groove along the axial direction. The central angle of the partial projection is 10°-45°, preferably 25°, so that the spiral grooves form a partial spiral groove that is evenly spaced. The spiral slider can maintain a sliding connection with the spiral groove at all times, so that the cooperation between the slider and the spiral groove forms a frictional cooperation similar to that between a sliding screw and a screw nut, which can form a self-locking mechanism. Therefore, the extension and retraction of the second guide arm within the first guide arm can only be controlled by rotating the rotating drum.

[0010] Preferably, the distal end of the second guide arm has a slide rod, on which a sliding sleeve is fitted, and the sliding sleeve is connected to the second guide arm by an elastic element; the sliding sleeve is slidably disposed on the first guide arm, and the position of the sliding sleeve can be limited by fasteners disposed on the first guide arm.

[0011] The outer wall of the sliding sleeve is uniformly provided with multiple grooves along its own length. The first guide arm 1 has a through hole for the sliding sleeve to pass through. A threaded hole is provided on the side wall of the through hole. The fastener is threadedly connected to the threaded hole. The end of the fastener has a limiting post that can engage with the groove. The fastener is preferably a stud. By rotating the fastener, the limiting post can be controlled to move in and out of the groove. In the natural state, the end faces of the sliding rod and the sliding sleeve away from the elastic element coincide, and the outer surface of the sliding rod is provided with a scale.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This foot and ankle surgical distal tibiofibular joint reduction and fixation guide primarily uses an adjustable structure to change the distance between the first and second guide arms. This allows the sleeves on the first and second guide arms to be positioned on opposite sides of the tibia and fibula during distal tibiofibular joint reduction surgery. The adjustable structure further controls the movement of the two sleeves towards each other, achieving a reasonable physiological distance between the tibiofibular joint. Kirschner wires are then inserted through the two sleeves, ensuring accurate fixation of the tibia and fibula. After removing the guide, compression fixation of the distal tibiofibular joint is complete. This guide avoids the need for secondary alignment and fixation during conventional distal tibiofibular compression fixation, preventing errors and accelerating the surgical process. It also improves the therapeutic effect of compression fixation.

[0013] 2. When the first and second guide arms initially contact the tibia and fibula through the adjustment structure, rotate the fastener so that the limiting post is engaged in one of the grooves, and the sliding sleeve is fixed on the first guide arm. Then, control the adjustment structure again so that the first and second guide arms continue to move closer to each other. At this time, observe the distance of the slide rod protruding from the end face of the sliding sleeve and read the scale on the slide rod to judge the degree of correction after pressure is applied, thus providing a reference for the doctor during the process of applying pressure to the patient's tibia and fibula. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present utility model; Figure 2 for Figure 1 Sectional view at point AA; Figure 3 for Figure 2 A magnified view of a section at point C; Figure 4 This is a schematic diagram of the structure of the first guide arm; Figure 5 This is a schematic diagram of the second guide arm. Figure 6 This is a schematic diagram of the rotating drum structure; Figure 7 for Figure 5 A magnified view of a section at point B in the middle; Figure 8 This is a schematic diagram of the model of this utility model.

[0015] Explanation of reference numerals in the attached figures: 1. First guide arm, 2. First guide hole, 3. Second guide arm, 4. Second guide hole, 5. Sliding hole, 6. Rotary cylinder, 7. Slider, 8. Spiral groove, 9. Sliding rod, 10. Sliding sleeve, 11. Elastic element, 12. Boss rotating surface, 13. Cylindrical cavity, 14. Annular groove, 16. Through hole, 17. Threaded hole, 18. Groove, 19. Protrusion. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. Words such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “inner,” “outer,” “upper,” “lower,” “far,” “near,” “front,” and “back” are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0018] The accompanying drawings in this utility model are not strictly drawn to scale; the specific dimensions and quantity of each structure can be determined according to actual needs. The drawings described in this utility model are merely structural schematic diagrams; please refer to the attached drawings for details. Figure 1 -Appendix Figure 8 .

[0019] First embodiment This utility model provides a foot and ankle surgical tibiofibular joint reduction and fixation guide, comprising a first guide arm 1, a second guide arm 3, and an adjustment structure. The first guide arm 1 has a first guide hole 2 at its proximal end; the second guide arm 3 has a second guide hole 4 at its proximal end, and the distal end of the second guide arm 3 is slidably connected to the distal end of the first guide arm 1. The second guide hole 4 is coaxially arranged with the first guide hole 2 to guide Kirschner wires through the tibia and fibula. An adjustment structure is provided between the first guide arm 1 and the second guide arm 3 to control their relative position, so that the proximal ends of the first guide arm 1 and the second guide arm 3 can jointly clamp the tibia and fibula. Further, a sliding hole 5 is provided at the end of the first guide arm 1 away from the first guide hole 2, and the second guide arm 3 passes through the sliding hole 5. The adjustment structure is provided on the first guide arm 1 to control the second guide arm 3 to slide along the length direction of the sliding hole 5. Furthermore, the adjustment structure includes a rotating cylinder 6 and a slider 7. The rotating cylinder 6 is rotatably mounted on the first guide arm 1, and the inner wall of the rotating cylinder 6 is provided with the helical slider 7. The surface of the second guide arm 3 is provided with a helical groove 8, and the slider 7 is slidably mounted in the helical groove 8. Rotating the rotating cylinder 6 drives the second guide arm 3 to slide along the length direction of the sliding hole 5 through the slider 7.

[0020] The first guide arm 1 and the second guide arm 3 are both L-shaped and, when fitted together, form an n-shape. Sleeves are fixedly installed at the ends of the first guide arm 1 and the second guide arm 3 that are far apart from each other. The inner walls of the two sleeves respectively form the first guide hole 2 and the second guide hole 4. The ends of the inner walls of the sleeves have chamfers to facilitate the passage of Kirschner wires. The sliding direction of the second guide arm 3 is parallel to the axial direction of the first guide hole 2. The cross-section of the sliding hole 5 is T-shaped, and the cross-sectional shape of the sliding hole 5 is adapted to the cross-sectional shape of the second guide arm 3. A boss rotating surface 12 is provided on the outer periphery of the end of the first guide arm 1 that is far from the first guide hole 2. A coaxial cylindrical cavity 13 is provided in the middle of the boss rotating surface 12, and the cylindrical cavity 13 connects to the sliding hole 5, so that the spiral groove 8 on the second guide arm 3 is exposed to the circular groove 13. Inside the cylindrical cavity 13, both ends of the inner wall of the rotating cylinder 6 are provided with annular grooves 14 that rotatably engage with the rotating surface 12 of the boss. These grooves are used to stably rotate the rotating cylinder 6 on the first guide arm 1. The cylindrical cavity 13 is used to accommodate the slider 7 on the inner wall of the rotating cylinder 6. The slider 7 is helical. By rotating the rotating cylinder 6, the slider 7 engages with the helical groove 8 and pushes the side wall of the helical groove 8 to move, thereby controlling the extension and retraction of the second guide arm 3 within the first guide arm 1. A protrusion 19 is fixedly provided on the end of the second guide arm 3 away from the second guide hole 4. The protrusion 19 can block the helical groove 8, so that after the slider 7 touches the protrusion 19, it cannot continue to slide and engage with the helical groove 8, thus preventing the second guide arm 3 from slipping off the first guide arm 1. The outer wall of the rotating cylinder 6 is provided with anti-slip texture.

[0021] Here, the spiral groove 8 is essentially a part of the complete spiral groove, more specifically, it is a partial projection of the spiral groove 8 onto the end face of the complete spiral groove along the axial direction. The central angle of the partial projection is 10°-45°, preferably 25°, so that the spiral groove 8 forms a partial spiral groove that is evenly spaced. The spiral slider 7 can maintain a sliding connection with the spiral groove 8 at all times, so that the cooperation between the slider 7 and the spiral groove 8 forms a frictional cooperation similar to that between a sliding screw and a screw nut, which can form a self-locking mechanism. Therefore, the extension and retraction of the second guide arm 3 within the first guide arm 1 can only be controlled by rotating the rotating drum 6.

[0022] This foot and ankle surgical guide for reducing and fixing the distal tibiofibular joint primarily uses an adjustable structure to change the distance between the first guide arm 1 and the second guide arm 3. This allows the sleeves on the first and second guide arms 1 and 3 to be positioned on opposite sides of the tibia and fibula during the reduction procedure. The adjustable structure further controls the movement of the two sleeves towards each other, achieving a reasonable physiological distance between the tibiofibular joint. Kirschner wires are then inserted through the two sleeves, ensuring accurate fixation of the tibia and fibula. After removing the guide, compression fixation of the distal tibiofibular joint is complete. This guide avoids the need for secondary alignment and fixation during conventional compression fixation procedures, preventing errors and accelerating the surgical process. It also improves the therapeutic effect of compression fixation.

[0023] Second Embodiment Based on the first embodiment, the distal end of the second guide arm 3 has a slide rod 9, and a slide sleeve 10 is sleeved on the slide rod 9. The slide sleeve 10 is connected to the second guide arm 3 by an elastic member 11. The slide sleeve 10 is slidably disposed on the first guide arm 1, and the position of the slide sleeve 10 can be limited by fasteners disposed on the first guide arm 1.

[0024] Because each patient has differences in the length, thickness, and physiological gap of the tibia and fibula due to differences in age, gender, and growth, it is impossible to accurately ensure that the physiological gap of the tibia and fibula is adjusted reasonably for different patients during the process of applying pressure to the tibia and fibula. Instead, the treatment is more about adaptive pressure adjustment based on the doctor's treatment experience. This structure was designed to provide doctors with accurate reference.

[0025] The outer wall of the sliding sleeve 10 is uniformly provided with a plurality of grooves 18 along its own length direction. The first guide arm 1 has a through hole 16 for the sliding sleeve 10 to pass through. The side wall of the through hole 16 is provided with a threaded hole 17. The fastener is internally threaded into the threaded hole 17. The end of the fastener has a limiting post that can engage with the groove 18. The fastener is preferably a stud. By rotating the fastener, the limiting post can be controlled to enter and exit the groove 18. In the natural state, the end faces of the sliding rod 9 and the sliding sleeve 10 away from the elastic element 11 coincide, and the outer surface of the sliding rod 9 is provided with a scale.

[0026] When the first guide arm 1 and the second guide arm 3 initially contact the tibia and fibula through the adjustment structure, the fastener is rotated so that the limiting post is locked into one of the grooves 18, and the sliding sleeve 10 is fixed on the first guide arm 1. Then the adjustment structure is controlled again so that the first guide arm 1 and the second guide arm 3 continue to move closer to each other. At this time, the distance of the slide rod 9 protruding from the end face of the sliding sleeve 10 is observed, and the scale on the slide rod 9 is read to judge the degree of correction after pressure is applied, thus providing a reference for doctors during the process of applying pressure to the patient's tibia and fibula.

[0027] The method of using the foot and ankle surgical distal tibiofibular joint reduction and fixation guide of this utility model is as follows: Preoperative planning: The needle insertion position and angle (corresponding to the position and angle of the two sleeves) are determined based on imaging examinations.

[0028] Disinfection and anesthesia: After local or general anesthesia, the surgical area is thoroughly disinfected.

[0029] Needle insertion: S1. Unscrew the fastener and rotate the rotating cylinder 6 in the forward direction, so that the slider 7 engages with the spiral groove 8 and pushes the side wall of the spiral groove 8 to the left, thereby controlling the two sleeves to move away from each other. S2. Move the two sleeves to the determined needle insertion position and angle, and rotate the rotating cylinder 6 in the opposite direction so that the ends of the two sleeves initially abut against the tibia and fibula. S3. Screw in the fastener so that the limiting post is locked into one of the grooves 18, thereby fixing the sliding sleeve 10 onto the first guide arm 1. S4. Rotate the rotating cylinder 6 in the opposite direction and observe the distance (e.g., 2mm or 3mm) of the sliding rod 9 protruding from the end face of the sliding sleeve 10. This helps to determine the reasonable physiological distance between the tibia and fibula based on imaging examinations. S5. Use an electric drill or a manual drill to insert the Kirschner wire through the sleeve and skin into the bone, and use fluoroscopy to confirm the location. S6. Rotate the rotating cylinder 6 in the forward direction to move the sleeves away from each other, and then remove the sleeves from the Kirschner wire.

[0030] Fixed adjustment: Cut off any excess needle, leaving part exposed or completely embedded, and then apply plaster or external fixation.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A surgical guide for reducing and fixing the tibiofibular joint in foot and ankle surgery, characterized in that, include: The first guide arm (1) has a first guide hole (2) at its proximal end; The second guide arm (3) has a second guide hole (4) at its proximal end, and the distal end of the second guide arm (3) is slidably connected to the distal end of the first guide arm (1). The second guide hole (4) is coaxially arranged with the first guide hole (2) to guide the Kirschner wire through the tibia and fibula. An adjustment structure is provided between the first guide arm (1) and the second guide arm (3) to control the relative position between the first guide arm (1) and the second guide arm (3) so that the proximal ends of the first guide arm (1) and the second guide arm (3) can jointly clamp the tibia and fibula.

2. The foot and ankle surgical tibiofibular joint reduction and fixation guide as described in claim 1, characterized in that, The first guide arm (1) has a sliding hole (5) at the end away from the first guide hole (2), and the second guide arm (3) passes through the sliding hole (5). The adjustment structure is set on the first guide arm (1) and is used to control the second guide arm (3) to slide along the length direction of the sliding hole (5).

3. The foot and ankle surgical tibiofibular joint reduction and fixation guide as described in claim 2, characterized in that, The adjustment structure includes a rotating cylinder (6) and a slider (7). The rotating cylinder (6) is rotatably mounted on the first guide arm (1), and the inner wall of the rotating cylinder (6) is provided with the spiral slider (7). The surface of the second guide arm (3) is provided with a spiral groove (8), and the slider (7) is slidably arranged in the spiral groove (8).

4. The foot and ankle surgical tibiofibular joint reduction and fixation guide as described in claim 1, characterized in that, The distal end of the second guide arm (3) has a slide rod (9), on which a slide sleeve (10) is fitted, and the slide sleeve (10) is connected to the second guide arm (3) by an elastic element (11); The sliding sleeve (10) is slidably disposed on the first guide arm (1), and the position of the sliding sleeve (10) can be limited by fasteners disposed on the first guide arm (1).

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