Reduction forceps for treating rotational dislocation type tibial plateau fracture

Abstract

The reduction forceps for treating the rotational dislocation type tibial plateau fracture comprise a first forceps leg and a second forceps leg which are oppositely arranged, finger rings are integrated at the near ends of the first forceps leg and the second forceps leg, and a first forceps shoulder and a second forceps shoulder are integrated at the far ends of the first forceps leg and the second forceps leg respectively. A movable hole for the first forceps shoulder to rotate penetrates through the second forceps shoulder, the first forceps shoulder penetrates through the second forceps shoulder through the movable hole, a short shaft is fixed to the first forceps shoulder, and the second forceps shoulder rotates around the short shaft. When one clamp arm rotates to contact with the rotary dislocation tibial plateau, the other clamp arm rotates to contact with the rotary dislocation tibial plateau, at the moment, the heights of the ends of the two clamp arms are inconsistent, but when the two clamp arms are close to each other for resetting, the pressure direction of the ends of the two clamp arms is perpendicular to the resetting direction of the rotary dislocation tibial plateau, and the resetting stability is improved.

Description

Technical Field

[0001] This utility model relates to medical devices, specifically to a reduction clamp for treating rotational dislocation type tibial plateau fractures. Background Technology

[0002] The tibial plateau metaphysis is mostly composed of cancellous bone and participates in the formation of the knee joint. If subjected to severe trauma, the plateau will collapse, often involving the medial and lateral condyles and the tibial shaft, resulting in severe soft tissue damage. Among them, rotational dislocation type tibial plateau fracture is a complex tibial plateau fracture caused by high energy and torsion. It is characterized by medial tibial plateau fracture with central and lateral collapse and displacement, and rotational subluxation often occurs on the lateral tibiofemoral side. However, the anterolateral cortical margin is usually incomplete. It is a rare type of bicondylar tibial plateau fracture. Choosing the appropriate surgical technique is one of the major challenges for surgeons.

[0003] In surgical techniques, the choice of internal fixation device affects the degree of postoperative functional recovery in patients. The optimal internal fixation device can achieve anatomical reduction of the tibial plateau, restore joint alignment, allow early postoperative knee joint movement, and effectively reduce postoperative complications. Currently, for complex tibial plateau fractures, the main clinical internal fixation devices used are unilateral locking plates and bilateral raft plates. The technical challenge lies in reducing the rotationally dislocated bone fragments to achieve normal axial alignment, a stable knee joint, and good knee joint range of motion. By using reduction forceps, one end is placed in the middle of the femoral condyle, and the other end is placed in the middle of the tibia on the opposite side of the same joint. After the condylar dislocation is restored, the medial and lateral tibial plateaus are fixed with both ends of the reduction forceps to reduce the possibility of tibial plateau dislocation below the femoral condyle and to provide initial reduction of the medial and lateral tibial condyles for patients with fractures and dislocations.

[0004] However, in the traditional use of reduction forceps, when one end of the forceps is placed in the middle of the femoral condyle and the other end is placed in the middle of the tibia on the opposite side of the same joint, the two ends of the forceps are at different heights. Therefore, the forceps need to be tilted, which results in the pressure direction at the end of the forceps not being perpendicular to the reduction direction of the tibial plateau of rotational dislocation. This leads to poor stability and affects the reduction effect. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, this utility model proposes a reduction clamp for treating rotational dislocation type tibial plateau fractures, comprising two opposing first clamp legs and a second clamp leg. The proximal ends of the first and second clamp legs are each integrally formed with a finger ring, and the distal ends are respectively integrally formed with a first clamp shoulder and a second clamp shoulder. The second clamp shoulder has a through hole for the first clamp shoulder to rotate, and the first clamp shoulder passes through the second clamp shoulder through the through hole. A short shaft is fixed on the first clamp shoulder, and the second clamp shoulder rotates around the short shaft. The end of the first clamp shoulder that extends out of the second clamp shoulder and the end of the second clamp shoulder that is away from the second clamp leg are both integrally formed with opposing ear plates. Each ear plate has a connecting groove, and a clamp arm is rotatably connected in the connecting groove through a connecting shaft.

[0006] To achieve the above objectives, a finger ring is designed to facilitate stable gripping of the first and second clamp legs by medical staff. This allows for control of the rotation of the first and second clamp shoulders, which are integrated with the first and second clamp legs, around their short axes. Medical staff can adjust one clamp arm to contact the middle of the femoral condyle and the other clamp arm to contact the middle of the tibial plateau on the opposite side of the same joint, as needed. At this point, the heights of the two clamp arms are not identical, but they are close to each other so that when the tibial plateau of the rotational dislocation is reduced, the pressure direction of the two clamp arm ends is perpendicular to the reduction direction of the tibial plateau of the rotational dislocation, thus improving the stability of the reduction.

[0007] Furthermore, the ear plate is provided with a positioning component for positioning the rotation angle of the clamp arm.

[0008] The above technical solution uses a positioning component to position the angle of rotation of the clamp arm around the connecting shaft, reducing the possibility of the clamp arm becoming loose or wobbling during the reset process.

[0009] Furthermore, the positioning component includes several slots formed on both sides of the clamp arm, the slots being arranged in an array with the center line of the connecting shaft as the center. Each side of the connecting slot has a guide groove arranged opposite to it. A spherical clamp head adapted to the slot is slidably connected in the guide groove. The spherical clamp head is fixedly connected to the bottom of the guide groove by a spring. A limit ring is coaxially fixed to the top of the guide groove. The limit ring is sleeved on the outside of the spherical clamp head, and the inner diameter of the limit ring is smaller than the diameter of the spherical clamp head.

[0010] The above technical solution uses a spring to provide elastic potential energy to control the movement of the ball-shaped chuck. When the ball-shaped chuck is inserted into an adjacent slot, the clamp arm is engaged and fixed with the ear plate. When the clamp arm is rotated forcefully, the ball-shaped chuck is retracted into the limiting ring and guide groove under pressure, without affecting the rotation of the clamp arm. By setting a limiting ring with an inner diameter smaller than the diameter of the ball-shaped chuck, the portion of the ball-shaped chuck extending out of the guide groove is restricted.

[0011] Furthermore, the clamp arm has an integrated ear seat at the end away from the ear plate, and an installation block is rotatably connected inside the ear seat via an installation shaft. The installation block extends out of the ear seat, and a spherical chuck is fixed to the part of the installation block extending out of the ear seat. The end of the ear seat away from the clamp arm is arc-shaped, and a limiting sleeve fixed to the installation block is nested outside the installation block. The limiting sleeve has an arc-shaped groove that matches the ear seat on the side facing the ear seat.

[0012] Through the above technical solution, the ball clamp and the ear seat are rotatably connected by the mounting shaft, so as to adjust the contact position between the ball clamp and the affected limb, further improving the stability of the clamp arm. By setting a limiting sleeve that matches the ear seat, the rotation angle of the ball clamp is limited.

[0013] Furthermore, an extension sleeve with a hollow inner cavity and an opening on one side is provided outside the limiting sleeve. The extension sleeve is nested outside the limiting sleeve and the ball clamp and is snapped into connection with the limiting sleeve. A gasket coaxially arranged with the ball clamp is fixed at the end of the extension sleeve away from the mounting block. The gasket has several evenly arranged arc-shaped protrusions integrated on the side facing the affected limb. A groove adapted to the ball clamp is opened in the middle position on the side of the gasket away from the extension sleeve.

[0014] Through the above technical solution, the extended sleeve connects the gasket and the limiting sleeve. The gasket increases the contact area between the device and the affected limb, and the arc-shaped protrusion increases the friction between the device and the affected limb. As needed, medical staff can choose whether to nest the extended sleeve outside the limiting sleeve so that the gasket contacts the affected limb, thereby improving the utilization rate of the device.

[0015] Furthermore, the gasket has several guide sleeves fixed to it, and the guide sleeves are arranged in an array with the center line of the gasket as the center. The guide sleeves are located outside the extension sleeve.

[0016] The above technical solution involves setting several guide sleeves on the pad to assist in the precise insertion of Kirschner wires during orthopedic surgery and to protect the Kirschner wires from breakage during puncture.

[0017] Furthermore, the second jaw shoulder has movable holes that communicate with the movable hole on both its upper and lower sides. The upper surface of the second jaw shoulder also has several circular holes that communicate with and are adapted to the movable holes. The circular holes are arranged at intervals along the long side of the movable holes. The diameter of the circular holes is larger than the width of the movable holes. The center line of the circular holes is parallel to the center line of the short shaft. The upper and lower ends of the short shaft pass through the movable holes and exit the second jaw shoulder. The lower end of the short shaft that exits the second jaw shoulder is fixed with a baffle plate with a diameter larger than the width of the movable hole. The upper end is fitted with a nut that is threadedly connected to the short shaft. The diameter of the nut is slightly smaller than the diameter of the circular holes.

[0018] Through the above technical solution, medical staff can control the movement of the short shaft within the moving hole according to the thickness of the affected limb, thereby adjusting the position of the first clamp shoulder integrated with the short shaft structure, thus adjusting the maximum distance between the two ball clamps. The short shaft is fixed with a nut by a thread, which limits the position of the short shaft without affecting the rotational connection of the first and second clamp shoulders.

[0019] Furthermore, a strip-shaped groove runs through the second jaw, and a connecting component that cooperates with the strip-shaped groove to limit the distance between the first jaw and the second jaw.

[0020] The above technical solution, by setting a connecting component that cooperates with the strip groove, limits the first and second clamp legs when the two ball clamps or pads clamp the affected limb, thus saving effort.

[0021] Furthermore, the connecting assembly includes a threaded hole penetrating the first clamp leg, a screw threadedly connected to the threaded hole, a handle coaxially fixed to one end of the screw protruding from the first clamp leg, and a tapered connecting block coaxially fixed to the other end. The diameter of the connecting block near the second clamp shoulder is smaller than the width of the slot, and the diameter of the connecting block away from the second clamp shoulder is larger than the width of the slot. A long rod coaxially fixed to the end of the connecting block away from the screw, the long rod penetrating the second clamp leg through the slot, and an anti-slip plate with a diameter larger than the width of the slot fixed to the end of the long rod protruding from the second clamp leg.

[0022] With the above technical solution, when the first and second clamping legs tighten or open, the long rod moves in the strip groove. When the distance between the first and second clamping legs is fixed to clamp the affected limb, the position of the screw is adjusted so that the locking block extends into the strip groove and is locked and fixed with the strip groove, so as to facilitate the fixed connection between the first and second clamping legs and play a role in saving effort.

[0023] In summary, the reduction clamp used to treat rotational dislocation type tibial plateau fractures has the following beneficial effects:

[0024] (1) The reduction clamp for treating rotational dislocation type tibial plateau fracture is equipped with finger rings to facilitate medical staff to stably grasp the first clamp leg and the second clamp leg, thereby controlling the first clamp shoulder and the second clamp shoulder, which are integrated with the first clamp leg and the second clamp leg, to rotate around the short axis. Medical staff can adjust one clamp arm to contact the middle of the femoral condyle and the other clamp arm to contact the middle of the tibial plateau on the opposite side of the same joint as needed. At this time, the height of the ends of the two clamp arms is not consistent, but the two clamp arms are close to each other so that when the rotational dislocation tibial plateau is reduced, the pressure direction of the ends of the two clamp arms is perpendicular to the reduction direction of the rotational dislocation tibial plateau, thereby improving the stability of reduction.

[0025] (2) The reduction clamp used to treat rotational dislocation type tibial plateau fracture has a ball-shaped clamp and an ear seat that are rotatably connected by a mounting shaft to facilitate adjustment of the contact position between the ball-shaped clamp and the affected limb, thereby further improving the stability of the clamp arm. The rotation angle of the ball-shaped clamp is limited by setting a limiting sleeve that is compatible with the ear seat.

[0026] (3) The reduction clamp used to treat rotational dislocation type tibial plateau fractures has several guide sleeves on the pad to assist in the precise insertion of Kirschner wires in orthopedic surgery and protect the Kirschner wires from breaking during the puncture process.

[0027] (4) The reduction clamp used to treat rotational dislocation type tibial plateau fracture, according to the thickness of the affected limb, the medical staff controls the short axis to move in the moving hole, thereby adjusting the position of the first clamp shoulder integrated with the short axis structure, thereby adjusting the maximum distance between the two ball clamps, and fixing it to the short axis with the nut thread, without affecting the rotational connection of the first clamp shoulder and the second clamp shoulder, while limiting the position of the short axis.

[0028] (5) The reduction clamp used to treat rotational dislocation type tibial plateau fracture, when the first clamp leg and the second clamp leg are tightened or opened, the long rod moves in the strip groove. When the distance between the first clamp leg and the second clamp leg is fixed to clamp the affected limb, the position of the screw is adjusted so that the locking block extends into the strip groove and is locked and fixed with the strip groove, so as to facilitate the fixed connection between the first clamp leg and the second clamp leg and play a role in saving effort. Attached Figure Description

[0029] The present invention will be further described and explained below with reference to the accompanying drawings.

[0030] Figure 1 This is a schematic diagram of the overall structure of the preferred embodiment of this utility model;

[0031] Figure 2 This is a schematic diagram of the overall left-side view of this utility model;

[0032] Figure 3 This is a schematic diagram illustrating the structure of the movable hole in this utility model;

[0033] Figure 4 This is the utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0034] Figure 5 This is the utility model Figure 3 Enlarged structural diagram at point B;

[0035] Figure 6 This is a partial cross-sectional view of the ear plate of this utility model;

[0036] Figure 7 This is the utility model Figure 6 Enlarged structural diagram at point C.

[0037] Reference numerals: 1. First jaw leg; 2. Second jaw leg; 3. Finger ring; 4. First jaw shoulder; 5. Second jaw shoulder; 6. Movable hole; 7. Short shaft; 8. Ear plate; 9. Connecting groove; 10. Connecting shaft; 11. Jaw arm; 12. Positioning assembly; 1201. Slot; 1202. Guide groove; 1203. Ball joint; 1204. Spring; 1205. Limiting ring; 13. Ear seat; 14. Mounting shaft; 15. Mounting block; 6. Ball chuck; 17. Limiting sleeve; 18. Arc groove; 19. Extension sleeve; 20. Washer; 21. Arc protrusion; 22. Groove; 23. Guide sleeve; 24. Moving hole; 25. Circular hole; 26. Baffle; 27. Nut; 28. Strip groove; 29. ​​Connecting assembly; 2901. Threaded hole; 2902. Screw; 2903. Connecting block; 2904. Long rod; 2905. Anti-detachment plate; 2906. Handle. Detailed Implementation

[0038] The technical solution of this utility model will be more clearly and completely explained below with reference to the accompanying drawings and through the description of the preferred embodiments of this utility model.

[0039] like Figure 1-7 As shown, the preferred embodiment of this utility model provides a reduction clamp for treating rotational dislocation type tibial plateau fractures, comprising two oppositely arranged thin, straight first clamp legs 1 and second clamp legs 2. Each of the first clamp legs 1 and second clamp legs 2 has an integrated finger ring 3 at its proximal end. The finger ring 3 facilitates stable gripping of the first clamp legs 1 and second clamp legs 2 by medical personnel, thereby controlling the rotation of the first clamp shoulder 4 and second clamp shoulder 5, which are integrated with the first clamp legs 1 and second clamp legs 2, around a short axis 7. The distal ends of the first clamp shoulder 4 and second clamp shoulder 5 are also integrated. A movable hole 6 for the first clamp shoulder 4 to rotate is passed through the second clamp shoulder 5. The first clamp shoulder 4 passes through the second clamp shoulder 5 through the movable hole 6. Movable holes 24 communicating with the movable hole 6 are passed through the upper and lower sides of the second clamp shoulder 5. The first clamp shoulder 4 is fixed... A short shaft 7 is provided to fit the movable hole 24. The diameter of the short shaft 7 is slightly smaller than the width of the movable hole 24. Both the upper and lower ends of the short shaft 7 pass through the movable hole 24 and slide to connect with the second jaw shoulder 5. A baffle 26 with a diameter larger than the width of the movable hole 24 is fixed at the lower end of the short shaft 7 that passes through the second jaw shoulder 5. Several circular holes 25 that communicate with and fit the movable hole 24 are also provided on the upper surface of the second jaw shoulder 5. The several circular holes 25 are arranged at intervals along the long side of the movable hole 24. The diameter of the circular holes 25 is larger than the width of the movable hole 24. The center line of the circular holes 25 is parallel to the center line of the short shaft 7. A nut 27 that is threaded to the short shaft 7 is fitted at the upper end of the short shaft 7 that passes through the second jaw shoulder 5. The diameter of the nut 27 is slightly smaller than the diameter of the circular holes 25.

[0040] like Figure 1 and Figure 2 and Figure 3 According to the patient's size, the medical staff controls the short shaft 7 to move within the moving hole 24, thereby adjusting the position of the first clamp shoulder 4, which is integrated with the short shaft 7, and thus adjusting the maximum distance between the two ball clamps 16. The short shaft 7 is fixed with the nut 27 by thread, which does not affect the rotation of the second clamp shoulder 5 around the short shaft 7 while limiting the position of the short shaft 7.

[0041] like Figure 1 and Figure 2 and Figure 3 and Figure 6The first clamp shoulder 4, extending through the second clamp shoulder 5, and the second clamp shoulder 5, away from the second clamp leg 2, are both integrally equipped with oppositely arranged ear plates 8. Each ear plate 8 has a connecting groove 9, and a clamp arm 11 is rotatably connected to the connecting groove 9 via a connecting shaft 10. The clamp arm 11 is located on the rear side of the ear plate 8. Medical staff can adjust one clamp arm 11 to contact the middle of the femoral condyle and the other clamp arm 11 to contact the tibial plateau of the rotational dislocation as needed. At this time, the heights of the ends of the two clamp arms 11 are not consistent, but when the two clamp arms 11 are close to each other for reduction, the pressure direction of the ends of the two clamp arms 11 is perpendicular to the reduction direction of the tibial plateau of the rotational dislocation, which improves the stability of reduction.

[0042] like Figure 1 and Figure 2 and Figure 3 and Figure 6 In order to prevent the clamp arm 11 from loosening and shaking during the reset process, the ear plate 8 is provided with a positioning component 12 to position the rotation angle of the clamp arm 11, so as to facilitate the positioning of the rotation angle of the clamp arm 11 around the connecting shaft 10.

[0043] like Figure 1 and Figure 2 and Figure 3 and Figure 6 and Figure 7 The positioning component 12 includes several slots 1201 on both sides of the clamp arm 11. The slots 1201 are arranged in an array with the center line of the connecting shaft 10 as the center. Guide slots 1202 are arranged oppositely on both sides of the connecting groove 9. A spherical clamp head 1203 adapted to the slot 1201 is slidably connected in the guide slot 1202. The spherical clamp head 1203 is fixedly connected to the bottom of the guide slot 1202 by a spring 1204. A limit ring 1205 is coaxially fixed to the top of the guide slot 1202. The limit ring 1205 is sleeved on the outside of the spherical clamp head 1203 and slidably connected to the spherical clamp head 1203. The inner diameter of the limit ring 1205 is smaller than the diameter of the spherical clamp head 1203.

[0044] like Figure 7 The spring 1204 provides elastic potential energy to control the movement of the ball-shaped clamp 1203. When the ball-shaped clamp 1203 is inserted into the adjacent clamping slot 1201, the clamp arm 11 is engaged and fixed with the ear plate 8. When the clamp arm 11 is rotated forcefully, the ball-shaped clamp 1203 is retracted into the limiting ring 1205 and the guide groove 1202 under pressure, without affecting the rotation of the clamp arm 11. By setting the limiting ring 1205 with an inner diameter smaller than the diameter of the ball-shaped clamp 1203, the part of the ball-shaped clamp 1203 extending out of the guide groove 1202 is restricted.

[0045] like Figure 1 and Figure 2 and Figure 3 and Figure 4 and Figure 5The clamp arm 11 has an integrated ear seat 13 at the end away from the ear plate 8. An installation block 15 is rotatably connected to the ear seat 13 via an installation shaft 14. The installation block 15 extends out of the ear seat 13, and a ball clamp 16 is fixed to the part of the installation block 15 extending out of the ear seat 13. The end of the ear seat 13 away from the clamp arm 11 is arc-shaped. A limiting sleeve 17 fixed to the installation block 15 is nested outside the installation block 15. The limiting sleeve 17 has an arc-shaped groove 18 that fits the ear seat 13 on the side facing the ear seat 13. The ball clamp 16 is rotatably connected to the ear seat 13 via the installation shaft 14 to adjust the position of the ball clamp 16 in contact with the affected limb, so that the ball clamp 16 is always placed in the middle position between the dislocated tibial plateau and the middle side wall of the femoral condyle, further improving the clamping stability of the clamp arm 11. By setting the limiting sleeve 17 that fits the ear seat 13, the rotation angle of the ball clamp 16 is limited.

[0046] like Figure 1 and Figure 2 and Figure 3 and Figure 4 and Figure 5 An extension sleeve 19 with a hollow inner cavity and an opening on one side is provided outside the limiting sleeve 17. The extension sleeve 19 is nested outside the limiting sleeve 17 and the ball clamp 16 and is snapped into the limiting sleeve 17. A pad 20 arranged coaxially with the ball clamp 16 is fixed to the end of the extension sleeve 19 away from the mounting block 15. The pad 20 has several evenly arranged arc-shaped protrusions 21 integrated on the side facing the affected limb. A groove 22 adapted to the ball clamp 16 is opened in the middle position on the side of the pad 20 away from the extension sleeve 19.

[0047] like Figure 1 and Figure 2 and Figure 3 and Figure 4 and Figure 5 The extension sleeve 19 connects the gasket 20 and the limiting sleeve 17. The gasket 20 increases the contact area between the device and the affected limb, and the arc-shaped protrusion 21 increases the friction between the device and the affected limb. As needed, medical staff can choose whether to nest the extension sleeve 19 outside the limiting sleeve 17 so that the gasket 20 contacts the affected limb, thereby improving the utilization rate of the device.

[0048] like Figure 1 and Figure 2 and Figure 3 and Figure 4 and Figure 5 The gasket 20 has several guide sleeves 23 fixed to it. The guide sleeves 23 are hollow inside, open at both ends, and have a diameter slightly larger than that of the Kirschner wire. The guide sleeves 23 are arranged in an array with the center line of the gasket 20 as the center. The guide sleeves 23 are located outside the extension sleeve 19. By setting several guide sleeves 23 on the gasket 20, the Kirschner wire is accurately inserted in orthopedic surgery, and the Kirschner wire is protected from breaking during the puncture process.

[0049] like Figure 1 and Figure 2 and Figure 3 To facilitate long-term clamping and repositioning, a strip groove 28 is provided through the second clamp leg 2. The first clamp leg 1 is provided with a connecting component 29 that cooperates with the strip groove 28 to limit the distance between the first clamp leg 1 and the second clamp leg 2. By setting the connecting component 29 that cooperates with the strip groove 28, when the two ball clamps 16 or pads 20 clamp the affected limb, the first clamp leg 1 and the second clamp leg 2 are limited, which saves effort.

[0050] like Figure 1 and Figure 2 and Figure 3 The connecting assembly 29 includes a threaded hole 2901 penetrating the first jaw 1. A screw 2902, threadedly connected to the threaded hole 2901, passes through the threaded hole 2901. A handle 2906 is coaxially fixed to one end of the screw 2902 extending out of the first jaw 1, and a tapered connecting block 2903 is coaxially fixed to the other end. The connecting block 2903 is elastic. The diameter of the connecting block 2903 near the second jaw shoulder 5 is smaller than the width of the slot 28, and the diameter of the connecting block 2903 away from the second jaw shoulder 5 is larger than the width of the slot 28. A handle 2906 is coaxially fixed to the end of the connecting block 2903 away from the screw 2902. The long rod 2904 passes through the strip groove 28 and penetrates the second clamp leg 2. One end of the long rod 2904 that extends out of the second clamp leg 2 is fixed with an anti-detachment plate 2905 with a diameter larger than the width of the strip groove 28. When the first clamp leg 1 and the second clamp leg 2 tighten or open, the long rod 2904 moves within the strip groove 28. When the distance between the first clamp leg 1 and the second clamp leg 2 is fixed to clamp the affected limb, the position of the screw 2902 is adjusted so that the locking block extends into the strip groove 28 and is locked and fixed with the strip groove 28, so as to facilitate the fixed connection between the first clamp leg 1 and the second clamp leg 2 and achieve the effect of saving effort.

[0051] In use, medical staff adjust the position of the short axis 7 according to the thickness of the middle of the femoral condyle and the tibial plateau. The medical staff grasps the nut 27 and manually rotates the nut 27 to disconnect the nut 27 from the short axis 7. Then, the medical staff manually pushes the first clamp shoulder 4 to move in the movable hole 6, which drives the short axis 7, which is integrated with the first clamp shoulder 4, to move in the movable hole 24. After the short axis 7 moves to the appropriate position, the medical staff puts the nut 27 on the outside of the short axis 7 and manually rotates the nut 27 to provide power. The nut 27 is threadedly connected to the short axis 7. During the rotation, the nut 27 moves and enters the circular hole 25. Through the cooperation of the nut 27, the short axis 7 and the circular hole 25, the relative rotation of the first clamp shoulder 4 and the second clamp shoulder 5 is not affected, while the first clamp shoulder 4 is prevented from shaking during the rotation.

[0052] During the movement of the first clamp shoulder 4, the screw 2902 set on the first clamp shoulder 4 will move, thereby causing the long rod 2904, which is integrated with the screw 2902, to slide in the strip groove 28.

[0053] Based on the mid-femoral condyle and the height of the tibial plateau in rotational dislocation, medical personnel grasp the clamp arm 11 and forcefully push it to rotate. The clamp arm 11 rotates around the connecting shaft 10. When the clamp arm 11 rotates to the point where the retaining groove 1201 is not in contact with the ball-shaped retaining head 1203, the ball-shaped retaining head 1203 is compressed into the guide groove 1202. At this time, the spring 1204 is compressed. When the clamp arm 11 rotates to contact the ball-shaped retaining head 1203, the spring 1204 rebounds, pushing the ball-shaped retaining head 1203 to extend out of the guide groove 1202 and into the retaining groove 1201. The ball-shaped retaining head 1203 is engaged with the retaining groove 1201. If the clamp arm 11 has not rotated to the appropriate position, the clamp arm 11 is continued to be rotated forcefully. When the clamp arm 11 is rotated to the appropriate position, the rotation stops. At this time, the clamp arm 11 and the ear plate 8 are engaged and fixed through the retaining groove 1201 and the ball-shaped retaining head 1203.

[0054] To further improve the stability of the reduction, the rotation angle of the mounting block 15 around the mounting axis 14 is manually adjusted until the two ball clamps 16 contact the middle position of the medial wall of the femoral condyle and the middle position of the lateral wall of the tibial plateau in rotational dislocation, respectively. If it is necessary to increase the contact area, the medical staff will nest the extension sleeve 19 outside the adjacent limiting sleeve 17 and lock it tightly with the limiting sleeve 17, and the gasket 20 will contact the affected limb.

[0055] At this time, the medical staff insert their thumb and index finger into the finger ring 3, with one pad 20 or ball clamp 16 placed in the middle of the femoral condyle and the other pad 20 or ball clamp 16 placed on the tibial plateau of the rotational dislocation. The thumb and index finger move closer to each other, causing the two clamp arms 11 to tighten. The pressure direction of the pad 20 or ball clamp 16 is perpendicular to the reduction direction of the tibial plateau of the rotational dislocation, which improves the reduction stability.

[0056] Then, grasp the handle 2906 and manually rotate it. The rotation of the handle 2906 will drive the screw 2902, which is fixed coaxially with the handle 2906, to rotate. The screw 2902 is threadedly connected to the first clamp leg 1 through the threaded hole 2901. The screw 2902 moves during rotation, which in turn drives the connecting block 2903, the long rod 2904, and the anti-detachment plate 2905, which are integrated with the screw 2902, to move. The connecting block 2903 moves to contact the strip groove 28 and is locked and fixed in place with the strip groove 28, positioning the first clamp leg 1 and the second clamp leg 2, which saves effort and reduces labor intensity.

[0057] The above-described specific embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Various modifications, substitutions, and improvements made by those skilled in the art to the technical solutions of the present invention based on the provided description and drawings, without departing from the design concept and spirit of the present invention, should all fall within the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims.

Claims

1. A reduction forceps for treating a rotational dislocation type tibial plateau fracture, characterized by, It includes two opposing first jaws (1) and second jaws (2). The first jaws (1) and the second jaws (2) each have a finger ring (3) integrated at their proximal ends and a first jaw shoulder (4) and a second jaw shoulder (5) integrated at their distal ends. The second jaw shoulder (5) has a movable hole (6) through which the first jaw shoulder (4) rotates. The first jaw shoulder (4) passes through the movable hole (6) and the second jaw shoulder (5). A short shaft (7) is fixed on the first jaw shoulder (4), and the second jaw shoulder (5) rotates around the short shaft (7). The first clamp shoulder (4) has an end that protrudes from the second clamp shoulder (5) and the end of the second clamp shoulder (5) that is away from the second clamp leg (2) both have ear plates (8) arranged in opposite directions. Each ear plate (8) has a connecting groove (9) and a clamp arm (11) is rotatably connected in the connecting groove (9) through a connecting shaft (10).

2. A reduction forceps for treating a rotational dislocation type tibial plateau fracture according to claim 1, wherein The ear plate (8) is provided with a positioning component (12) for positioning the rotation angle of the clamp arm (11).

3. A reduction forceps for treating a rotational dislocation type tibial plateau fracture according to claim 2, wherein The positioning component (12) includes several slots (1201) on both sides of the clamp arm (11). The slots (1201) are arranged in an array with the center line of the connecting shaft (10) as the center. The connecting groove (9) has guide grooves (1202) arranged opposite to each other on both sides of the groove wall. A spherical clamp head (1203) adapted to the slot (1201) is slidably connected in the guide groove (1202). The spherical clamp head (1203) is fixedly connected to the bottom of the guide groove (1202) by a spring (1204). A limiting ring (1205) is coaxially fixed to the top of the guide groove (1202). The limiting ring (1205) is sleeved on the outside of the spherical clamp head (1203). The inner diameter of the limiting ring (1205) is smaller than the diameter of the spherical clamp head (1203).

4. The reduction forceps for treating a rotational dislocation type tibial plateau fracture according to claim 3, wherein The clamp arm (11) has an integrated ear seat (13) at the end away from the ear plate (8). An installation block (15) is rotatably connected inside the ear seat (13) via an installation shaft (14). The installation block (15) extends out of the ear seat (13). A ball chuck (16) is fixed to the part of the installation block (15) that extends out of the ear seat (13). The end of the ear seat (13) away from the clamp arm (11) is arc-shaped. The mounting block (15) is nested with a limiting sleeve (17) that is fixed to the mounting block (15). The limiting sleeve (17) has an arc-shaped groove (18) that is adapted to the ear seat (13) on the side facing the ear seat (13).

5. A reduction forceps for treating a rotational dislocation type tibial plateau fracture according to claim 4, wherein The limiting sleeve (17) is provided with an extension sleeve (19) with a hollow inner cavity and an opening on one side. The extension sleeve (19) is nested outside the limiting sleeve (17) and the ball clamp (16) and is snapped into the limiting sleeve (17). A gasket (20) is fixed at the end of the extension sleeve (19) away from the mounting block (15) and is arranged coaxially with the ball clamp (16). The gasket (20) has several evenly arranged arc-shaped protrusions (21) integrated on the side facing the affected limb. A groove (22) adapted to the ball clamp (16) is opened in the middle position on the side of the gasket (20) away from the extension sleeve (19).

6. A reduction forceps for treating a rotational dislocation type tibial plateau fracture according to claim 5, wherein The gasket (20) has several guide sleeves (23) that are fixed to the gasket (20). The guide sleeves (23) are arranged in an array with the center line of the gasket (20) as the center. The guide sleeves (23) are located outside the extension sleeve (19).

7. A reduction clamp for treating rotational dislocation type tibial plateau fractures according to claim 1, characterized in that, The second jaw (5) has a moving hole (24) that communicates with the moving hole (6) on both the upper and lower sides. The upper surface of the second jaw (5) is also provided with a number of circular holes (25) that communicate with and are adapted to the moving hole (24). The number of circular holes (25) are arranged at intervals along the long side of the moving hole (24). The diameter of the circular holes (25) is larger than the width of the moving hole (24). The center line of the circular holes (25) is parallel to the center line of the short axis (7). Both ends of the short shaft (7) pass through the second clamp shoulder (5) through the moving hole (24). The lower end of the short shaft (7) passing through the second clamp shoulder (5) is fixed with a baffle (26) with a diameter greater than the width of the moving hole (24). The upper end is fitted with a nut (27) that is threadedly connected to the short shaft (7). The diameter of the nut (27) is slightly smaller than the diameter of the circular hole (25).

8. The reduction forceps for treating a rotational dislocation type tibial plateau fracture according to claim 1, wherein The second clamp leg (2) has a through groove (28), and the first clamp leg (1) is provided with a connecting component (29) that cooperates with the groove (28) to limit the distance between the first clamp leg (1) and the second clamp leg (2).

9. A reduction forceps for treating a rotational dislocation type tibial plateau fracture according to claim 8, wherein The connecting assembly (29) includes a threaded hole (2901) penetrating the first jaw leg (1), and a screw (2902) threadedly connected to the threaded hole (2901) passes through the threaded hole (2901). One end of the screw (2902) protruding from the first jaw leg (1) is coaxially fixed with a handle (2906), and the other end is coaxially fixed with a tapered connecting block (2903). The diameter of the connecting block (2903) near the second jaw shoulder (5) is... The diameter of the connecting block (2903) is smaller than the width of the strip groove (28), and the diameter of the side away from the second clamp shoulder (5) is larger than the width of the strip groove (28). A long rod (2904) is coaxially fixed at the end of the connecting block (2903) away from the screw (2902). The long rod (2904) passes through the second clamp leg (2) through the strip groove (28). An anti-detachment plate (2905) with a diameter larger than the width of the strip groove (28) is fixed at the end of the long rod (2904) that passes out of the second clamp leg (2).

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