Ankle fracture reduction forceps with adjustable angle k-wire guide

Abstract

The application discloses an ankle fracture reduction forceps with a Kirschner wire guiding structure with an adjustable angle, which comprises two cross X-shaped forceps arms and downward forceps heads arranged at the left ends of the forceps arms, the two forceps arms are hingedly connected, the two forceps heads are downwardly arc-bent and oppositely arc-bent, and a locking rack is arranged between the right ends of the two forceps arms and staggered upwards and downwards. The forceps head at the front side is arranged into two parts of a supporting part at the upper side and a clamping part at the lower side, and the supporting part and the clamping part are reversely connected, further comprising a Kirschner wire guiding mechanism arranged on the supporting part and the clamping part, and after the angle of the guiding mechanism is adjusted, the clamping force of the reduction can be used to fix between the supporting part and the clamping part when the ankle fracture is clamped. Compared with the traditional movable type, the self-clamping type is adopted, and the greater the force required for the reduction, the tighter the guiding mechanism is clamped, so that the angle adjustment and the locking are realized conveniently.

Description

Technical Field

[0001] This invention relates to the field of Kirschner wire angle adjustment and locking for ankle fracture reduction, specifically to an ankle fracture reduction clamp with an adjustable Kirschner wire guide structure. Background Technology

[0002] During the reduction of fractures of the medial malleolus, lateral malleolus, or trimalleolar region, surgeons typically need to perform temporary Kirschner wire fixation while maintaining the reduction of the fracture ends. Traditional reduction clamps primarily provide clamping and reduction functions, and the Kirschner wire insertion angle largely depends on the surgeon's experience and the assistance of an assistant. If an independent locking structure is installed, it may increase the number of steps in the operation, and repeated adjustments could lead to loss of fracture reduction or deviation of the insertion direction. Therefore, it is necessary to provide a reduction clamp structure that can simultaneously lock the Kirschner wire guide angle during the clamping and reduction process. Summary of the Invention

[0003] The purpose of this invention is to provide an ankle fracture reduction clamp with an adjustable-angle Kirschner wire guide structure to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an ankle fracture reduction clamp with an adjustable angle Kirschner wire guiding structure, comprising two clamp arms that cross in an "X" shape and a clamp head located at the left end of the clamp arm pointing downwards. The two clamp arms are hinged together, and the two clamp heads are bent downwards in an arc shape and bent towards each other in an arc shape. A locking rack with alternating vertical teeth is provided between the right ends of the two clamp arms. The rack is arc-shaped and can be locked together with the hinge point of the two clamp arms as the center. When the racks are staggered vertically, they will separate. This is the prior art, which uses a ratchet locking structure in reduction clamps.

[0005] The front clamp head is configured with an upper support section and a lower clamping section, which are flipped together. It also includes a Kirschner wire guide mechanism located in both the support and clamping sections. After the guide mechanism's angle is adjusted, it can be fixed between the support and clamping sections using the clamping force during ankle fracture reduction. Compared to traditional movable clamps, this is a self-clamping type. Furthermore, the greater the force required for reduction, the tighter the clamping force on the guide mechanism. This allows for angle adjustment, convenient locking, and increased fixation strength with increasing clamping force, resulting in a more secure fit.

[0006] Preferably, the upper side of the inner end of the clamping part is rotatably connected to the inner side of the support part through an arc-shaped connecting block to achieve flipping, and an installation gap is provided between the support part and the clamping part. The upper end of the clamping part is provided with a rotating shaft, and the guide mechanism is connected to the rotating shaft in the installation gap. The rotating shaft is rotated, and the installation gap is used to clamp the clamping part.

[0007] Preferably, the guiding mechanism includes a guide cylinder and a rotating block disposed on one side of the guide cylinder. The rotating block is rotatably mounted on a rotating shaft within the installation gap. When the fractured end of the ankle joint is clamped, the opposite end of the support and clamping parts can clamp the rotating block to achieve fixation. The thickness of the rotating block corresponds to the height of the installation gap. The rotating block has a rotating hole corresponding to the rotating shaft, and the depth of the rotating hole is greater than the depth of the rotating shaft. This ensures that the rotating shaft is not blocked during clamping, thus guaranteeing the clamping force.

[0008] Preferably, the connecting block and the support are connected by a damping shaft to prevent the clamping part from shaking and ensure stability, so that the rotating block is not easily rotated.

[0009] Preferably, the clamping part and the lower end of the opposite clamp head extend downward to form a vertical opening part to facilitate outward opening, and the connecting block extends upward and flips the connection point to form a limiting part that can abut against the support part. The limiting part forms support from the inside, thereby realizing outward opening. However, it should be noted that there is a gap between the installation gap and the rotating block, which can rotate normally. It also includes a force application mechanism that drives the distal ends of the two racks to move closer to each other. After squeezing, the distal ends of the two racks move closer together, and the clamp arms open to realize opening.

[0010] Preferably, the force-applying mechanism includes an arc-shaped handle disposed near the end of the rack, with the arc-shaped opening facing outward, and the two handles located inside the two clamp arms. When the two handles apply force and approach each other, the two clamp arms separate to achieve the opening of the ankle bone.

[0011] Preferably, the end of the limiting part is provided with an elastic element that elastically abuts against the support part to prevent the rotating block from shaking. It can also be other elastic material. The main purpose is to ensure that the support part and the clamping part can clamp the rotating block, provide an initial clamping force, and enable rotation without slipping.

[0012] Preferably, the pull handle is plate-shaped, with the upper pull handle located at the front, the upper side of the front end face tilted forward, and the lower side of the rear end face of the lower pull handle tilted backward, so that when the two are pinched together, the two racks are offset vertically under the action of the tilting force. When pinching, the upper front pull handle has an upward component force, and the lower rear pull handle has a downward component force, thus realizing the vertical component force when pinching, thereby unlocking.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The clamping force is used to reset the block, and the angle is adjusted by the guide tube. The rotating block rotates between the support and the clamping part. Then, the two clamping arms are squeezed, and the support and clamping parts clamp the rotating block to achieve fixation. The clamping force of the reset is used to lock the block. The operation steps are simplified. If a secondary adjustment is needed, the clamping arms can be easily released and the rotating block can rotate freely. After adjusting to the ideal angle, the clamping force is squeezed again to reset and lock the block. The whole process does not require additional operation of the locking mechanism, which significantly improves the operation efficiency. The clamping force is linearly adjusted with the squeezing pressure. The greater the squeezing pressure, the greater the clamping force, thereby reducing the risk of angle deviation of the guide tube during the needle placement process.

[0015] 2. When you want to open the ankle, prevent the opening part from slipping by squeezing the two handles. The arc structure converts the force into staggered components, which drive the distal ends of the rack to move closer to each other. The clamp arms open accordingly, and the opening part moves outward in sync, achieving precise opening of the ankle bone. At the same time, the elastic element continuously provides pre-tightening force to ensure that the opening process is stable and controllable, and can also avoid tissue damage caused by instantaneous impact, playing a certain buffering role.

[0016] 3. This design can achieve both clamping for resetting and outward expansion, thus serving a dual purpose;

[0017] 4. The pull handle is tilted so that when squeezed, the force generated facilitates the upper side to drive the upper rack upward and the lower side to drive the lower rack downward, thereby disengaging and releasing the lock.

[0018] 5. After the Kirschner wire is fixed, loosen the clamp arm. A gap will be created between the support part and the clamping part. Then the guide tube will slide along the Kirschner wire, making the gap larger, so that the rotating block and the guide tube can be removed. Compared with the traditional method of opening the clamp arm at a large angle, here only a small angle needs to be opened, which is simpler and more convenient.

[0019] 6. The above structure allows repositioning, guiding, and angle locking to be completed on the same instrument, reducing the number of additional locking components required during surgery. At the same time, the detachable or lateral opening design of the guide tube facilitates instrument withdrawal after Kirschner wire insertion, which is more in line with the actual operation process of orthopedic surgical instruments. Attached Figure Description

[0020] Figure 1 This is a front view of the first embodiment of the present invention;

[0021] Figure 2 This is a top view of the first embodiment of the present invention;

[0022] Figure 3 This is an axonometric view of the first embodiment of the present invention;

[0023] Figure 4 This is an exploded view of the first embodiment of the present invention;

[0024] Figure 5This is a front view of the second embodiment of the present invention;

[0025] Figure 6 This is a top view of the second embodiment of the present invention;

[0026] Figure 7 This is a left view of the second embodiment of the present invention;

[0027] Figure 8 This is an axonometric view of the second embodiment of the present invention;

[0028] Figure 9 This is an axonometric view of another form of the pull handle according to the second embodiment of the present invention;

[0029] In the diagram: 1. Pliers arm; 2. Pliers head; 21. Support part; 22. Clamping part; 23. Connecting block; 24. Rotating shaft; 3. Rack; 4. Guide cylinder; 41. Rotating block; 5. Spreading part; 51. Limiting part; 52. Elastic element; 6. Pull handle. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] Please see Figures 1 to 4 This invention provides a technical solution for an ankle fracture reduction clamp with an adjustable-angle Kirschner wire guide structure: An ankle fracture reduction clamp with an adjustable-angle Kirschner wire guide structure includes two clamp arms 1 that cross in an "X" shape and a clamp head 2 located at the left end of the clamp arm 1 and pointing downwards. The two clamp arms 1 are hinged together, and the two clamp heads 2 are bent downwards in an arc shape and bent in an arc shape towards each other. A locking rack 3 with alternating vertical and horizontal teeth is provided between the right ends of the two clamp arms 1. The rack 3 is arc-shaped and can be locked together with the hinge point of the two clamp arms 1 as the center. When the racks are staggered vertically, they will separate. This is the prior art, which uses a ratchet locking structure in reduction clamps.

[0033] The front clamp head 2 is configured with an upper support portion 21 and a lower clamping portion 22, which are flipped together. It also includes a Kirschner wire guide mechanism located in the support portion 21 and the clamping portion 22. After the guide mechanism's angle is adjusted, it can be fixed between the support portion 21 and the clamping portion 22 using the clamping force during ankle fracture reduction. Compared to traditional movable clamps, this is a self-clamping type. Furthermore, the greater the force required for reduction, the tighter the clamping force on the guide mechanism. This allows for angle adjustment, convenient locking, and increased fixation strength with increasing clamping force, resulting in a more secure clamping mechanism.

[0034] The upper inner end of the clamping part 22 is rotatably connected to the inner side of the support part 21 through an arc-shaped connecting block 23 to achieve flipping. The connecting block 23 and the support part 21 are connected by a damping shaft to prevent the clamping part 22 from shaking and ensure stability. In this way, the rotating block 41 is not easy to rotate at will. An installation gap is provided between the support part 21 and the clamping part 22. A rotating shaft 24 is provided at the upper end of the clamping part 22, and the guide mechanism is connected to the rotating shaft 24 in the installation gap. The rotating shaft 24 is rotated, and the installation gap is used to clamp.

[0035] The guiding mechanism includes a guide cylinder 4 and a rotating block 41 disposed on one side of the guide cylinder 4. The rotating block 41 is rotatably mounted on a rotating shaft 24 within the installation gap. When clamping the fractured end of the ankle joint, the opposite ends of the support part 21 and the clamping part 22 can clamp the rotating block 41 to achieve fixation. The thickness of the rotating block 41 corresponds to the height of the installation gap. The rotating block 41 has a rotating hole corresponding to the rotating shaft 24, and the depth of the rotating hole is greater than the depth of the rotating shaft 24. This ensures that the rotating shaft 24 will not be blocked when clamping, thus guaranteeing the clamping force. Here, the rotating block 41 can be directly removed from the rotating shaft 24. After the Kirschner wire is fixed, the clamp arm 1 is released, and a gap is created between the support part 21 and the clamping part 22. Then, the guide cylinder 4 slides along the Kirschner wire, and the gap becomes larger, thereby removing the rotating block 41 and the guide cylinder 4. Compared with the traditional method that requires a large angle to open the clamp arm 1, this only requires a slight opening angle, which is simpler and more convenient.

[0036] Example 2

[0037] like Figures 5 to 8 Based on Embodiment 1, as a preferred embodiment, the lower ends of the clamping part 22 and the opposite clamp head 2 extend downward to form a vertical opening part 5 to facilitate outward opening, and the connecting block 23 extends upward to form a limiting part 51 that can abut against the support part 21 after the flip connection point. The limiting part 51 forms support from the inside, thereby realizing outward opening. However, it should be noted that there is a gap between the installation gap and the rotating block 41, which can rotate normally. It also includes a force application mechanism that drives the distal ends of the two racks 3 to move closer to each other. After squeezing, the distal ends of the two racks 3 move closer, and the clamp arm 1 will open to realize opening.

[0038] The clamping part 22 and the lower end of the opposite clamp head 2 extend downward to form a vertical opening part 5 to facilitate outward opening. The connecting block 23 extends upward and flips the connection point to form a limiting part 51 that can abut against the support part 21. The limiting part 51 provides support from the inside, thereby achieving outward opening. However, it should be noted that there is a gap between the installation gap and the rotating block 41, which allows for normal rotation. It also includes a force-applying mechanism that drives the distal ends of the two racks 3 to approach each other. After squeezing, the distal ends of the two racks 3 approach each other, and the clamp arm 1 opens to achieve opening.

[0039] The force-applying mechanism includes an arc-shaped pull handle 6 located near the end of the rack 3, with the arc-shaped opening facing outwards. The two pull handles 6 are located inside the two clamp arms 1. When the two pull handles 6 apply force and move closer together, the two clamp arms 1 separate to spread the ankle bone. The end of the limiting part 51 is provided with an elastic element 52 that elastically abuts against the support part 21 to prevent the rotating block 41 from shaking. The elastic element 52 can be a silicone pad, a medical silicone rubber pad, a polyurethane elastic pad, or a fluororubber pad, etc., which is durable and easy to sterilize. Its main function is to ensure that the support part 21 and the clamping part 22 can clamp the rotating block 41, providing an initial clamping force, allowing it to rotate, and preventing it from sliding arbitrarily.

[0040] As a preferred method, such as Figure 9 As shown, the pull handle 6 is plate-shaped, with the upper pull handle 6 located at the front. The upper side of the front end face is tilted forward, and the lower side of the rear end face of the lower pull handle 6 is tilted backward. This allows the two racks 3 to be offset vertically under the action of the tilting force when they are pinched together. When pinched, the upper front pull handle 6 has an upward component force, and the lower rear pull handle 6 has a downward component force. Thus, vertical force is achieved when pinching, thereby unlocking the device.

[0041] Working principle: The clamp head 2 is reset, and the angle is adjusted by the guide cylinder 4. The rotating block 41 rotates between the support part 21 and the clamping part 22. Then, the two clamp arms 1 are squeezed, and the support part 21 and the clamping part 22 clamp the rotating block 41 to achieve fixation. The clamping force of the reset is used to lock it, which is simple and convenient. If a secondary adjustment is needed, the clamp arms 1 can be easily released, and the rotating block 41 can rotate freely. After adjusting to the ideal angle, it can be reset and locked by squeezing again. The whole process does not require additional operation of the locking mechanism, which significantly improves the operation efficiency. Moreover, the clamping force is linearly adjusted with the squeezing pressure. The greater the squeezing force, the greater the clamping force, thereby reducing the risk of angle deviation of the guide cylinder during the needle placement process.

[0042] When you want to open it up, the opening part 5 prevents slippage. Squeeze the two pull handles 6, and the arc structure will convert the force into staggered components, which will drive the distal ends of the rack 3 to move closer to each other. The clamp arm 1 will open up accordingly, and the opening part will move outward in sync, so as to achieve precise opening of the ankle bone. At the same time, the elastic element 52 will continuously provide pre-tightening force to ensure that the opening process is stable and controllable, and can also avoid tissue damage caused by instantaneous impact, thus playing a certain buffering role.

[0043] This design allows for both clamping for resetting and outward expansion, achieving a dual purpose.

[0044] The pull handle 6 is tilted so that when squeezed, the resulting force facilitates the upper side to drive the upper rack 3 upward and the lower side to drive the lower rack 3 downward, thereby disengaging and releasing the lock.

[0045] Loosen the clamp arm 1, and a gap is created between the support part 21 and the clamping part 22. Then the guide cylinder 4 slides along the Kirschner wire, and the gap becomes larger, thereby removing the rotating block 41 and the guide cylinder 4. Compared with the traditional method that requires a large angle to open the clamp arm 1, here it is only necessary to open it slightly, which is simpler and more convenient.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ankle fracture reduction clamp with an adjustable angle Kirschner wire guide structure, comprising two clamp arms (1) that cross in an "X" shape and a clamp head (2) set at the left end of the clamp arm (1) facing downwards, and a locking rack (3) that is staggered between the right ends of the two clamp arms (1). Its features are: The front clamp head (2) is configured as an upper support part (21) and a lower clamping part (22), and the support part (21) and the clamping part (22) are flipped and connected. It also includes a Kirschner wire guide mechanism provided in the support part (21) and the clamping part (22). After the angle of the guide mechanism is adjusted, it can be fixed between the support part (21) and the clamping part (22) by the clamping force of the reduction when the ankle joint fracture is reduced and clamped.

2. The ankle fracture reduction clamp with an adjustable-angle Kirschner wire guide structure according to claim 1, characterized in that: The upper side of the inner end of the clamping part (22) is rotatably connected to the inner side of the support part (21) through an arc-shaped connecting block (23) to achieve flipping. An installation gap is provided between the support part (21) and the clamping part (22). A rotating shaft (24) is provided at the upper end of the clamping part (22), and the guide mechanism is connected to the rotating shaft (24) in the installation gap.

3. The ankle fracture reduction clamp with an adjustable-angle Kirschner wire guide structure according to claim 2, characterized in that: The guiding mechanism includes a guide cylinder (4) and a rotating block (41) disposed on one side of the guide cylinder (4). The rotating block (41) is rotatably mounted on a rotating shaft (24) within the installation gap. When the fractured end of the ankle joint is clamped, the opposite ends of the support part (21) and the clamping part (22) can clamp the rotating block (41) to achieve fixation.

4. The ankle fracture reduction clamp with an adjustable-angle Kirschner wire guide structure according to claim 2, characterized in that: The connecting block (23) and the support (21) are connected by a damping shaft.

5. The ankle fracture reduction clamp with an adjustable-angle Kirschner wire guide structure according to claim 3, characterized in that: The lower ends of the clamping part (22) and the opposite clamp head (2) extend downward to form a vertical opening part (5) to facilitate outward opening, and the connecting block (23) extends upward to form a limiting part (51) that can abut against the support part (21) after the flip connection point. It also includes a force application mechanism that drives the far ends of the two racks (3) to approach each other.

6. The ankle fracture reduction clamp with an adjustable-angle Kirschner wire guide structure according to claim 5, characterized in that: The force-applying mechanism includes an arc-shaped pull handle (6) located near the end of the rack (3), and the two pull handles (6) are located inside the two clamp arms (1). When the two pull handles (6) apply force and approach each other, the two clamp arms (1) separate to achieve the opening of the ankle bone.

7. The ankle fracture reduction clamp with an adjustable-angle Kirschner wire guide structure according to claim 5, characterized in that: The end of the limiting part (51) is provided with an elastic element (52) of the elastic abutment support part (21) to prevent the rotating block (41) from shaking.

8. The ankle fracture reduction clamp with an adjustable-angle Kirschner wire guide structure according to claim 6, characterized in that: The pull handle (6) is plate-shaped, with the upper pull handle (6) located at the front, the upper side of the front end face tilted forward, and the lower side of the rear end face of the lower pull handle (6) tilted backward, so that when the two are pinched together, the two racks (3) are staggered up and down under the action of the tilting force.

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