A reduction forceps for fixing a bone plate

Abstract

The utility model relates to orthopedic surgical instrument technical field. A kind of reduction forceps for fixing bone plate, including first jaw arm and second jaw arm, first jaw arm and second jaw arm are rotatably connected by hinged shaft;The front end of first jaw arm is connected with the clamping assembly for clamping bone plate;Clamping assembly includes fixed clamp and telescopic movable clamp, the inside upper end of fixed clamp is equipped with two mutually parallel sliding grooves, movable clamp is equipped with two corresponding pull rods with sliding groove, one end in fixed clamp inside of pull rod and located is fixedly provided with limit ring, pull rod is sleeved with reset spring, reset spring is located in fixed clamp inside, and the upper end of reset spring end butts against sliding groove upper end edge, the lower end of reset spring and limit ring are abutted;Bone plate is detachably installed between fixed clamp and movable clamp;The front end of second jaw arm is connected with clamping claw.The utility model can prevent bone plate displacement in operating process, and make reduction forceps can keep fixed, can improve the accuracy and stability of fracture reduction.

Description

Technical Field

[0001] This utility model relates to the field of orthopedic surgical instruments, and in particular to a repositioning clamp for fixing bone plates. Background Technology

[0002] Fracture reduction is a major challenge in fracture surgery. Because human bones are both strong and resilient, fracture reduction often presents significant difficulties for surgeons. In some cases, bone plates are used to assist in fixing the bone position and allowing the fracture site to heal itself. Bone plates are commonly used internal fixation devices in orthopedic surgery, and include titanium alloy plates, stainless steel plates, bio-locking plates, and memory plates. Their principle is to use bone plates and screws to fix the fracture site and promote healing. The design of bone plates is mainly based on the shape, size, and manner of bone joining. Commonly used bone plates are perforated plate-shaped internal fixation devices for fractures.

[0003] In fracture treatment, reduction forceps used for bone plates play a crucial role in the precise reduction of fracture ends. During use, the bone plate to be implanted is fixed to the human bone cortex, and the reduction forceps are used to press the plate down, maintaining its relative position stability. Traditional reduction forceps, such as the wide-mouth retractor for shape memory alloy rib plates disclosed in Chinese utility model patent CN207949860U, include a left and right forceps body. The left and right forceps bodies are hinged together at the middle by a hinge screw. Left and right spring plates are located between the handles of the left and right forceps bodies. The jaws of the left and right forceps bodies are two corresponding widened fan-shaped plates, and both fan-shaped plates have anti-slip grooves on their backs. This utility model features left and right forceps with correspondingly widened fan-shaped jaws. The jaws gradually transition from an arc to an enlarged and widened fan shape, enabling simultaneous and uniform opening of all pairs of circumferential arms in sterile ice-cold saline solution. This eliminates the need for repeated opening of each pair of arms, reducing damage to the instruments caused by uneven force during arm opening, simplifying the surgeon's operation, shortening surgical time, and making the implantation process simpler and faster. It is suitable for opening the circumferential arms of various shape memory alloy rib plates. However, the jaws of this forceps exhibit relatively low stability when clamping the bone plate. Another type of reduction forceps, such as the Chinese invention disclosed in publication number CN117159119A, is a rib plate clamping forceps. It includes two handles of the same size and shape, rotatably connected by a connecting shaft. One end of each handle has two symmetrically arranged arc-shaped jaws, and the other end has a ring-shaped grip for single-handed holding. Near the grip, the handle has a self-locking structure that restricts the jaws from opening. A release ring that unlocks the self-locking structure is rotatably connected to one side of the grip. A thin steel cable connects the release ring and the self-locking structure; rotating the release ring pulls the steel cable, thus releasing the self-locking structure. However, when using this reduction forceps for temporary fixation of the rib plate to the bone surface, the relatively sharp tips of the forceps often make it difficult to stably fix the rib plate in a specific position during operation, easily leading to slippage or displacement, affecting the reduction effect and the surgical process. Moreover, in complex fracture cases, such as multi-segment fractures or periarticular fractures, the requirements for precise positioning and stable clamping of the connecting bone plates are even higher. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems mentioned in the background art above, and provides a reduction clamp for fixing bone plates. Its structure is reasonable and can help doctors accurately reduce the fracture site, prevent the bone plate from shifting during the operation, and keep the reduction clamp fixed, thereby improving the accuracy and stability of fracture reduction.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A reduction clamp for fixing a bone plate includes a first clamp arm and a second clamp arm, which are rotatably connected by a hinge shaft. The front end of the first clamp arm is connected to a clamping assembly for holding the bone plate. The clamping assembly includes a fixed clamp and a retractable movable clamp. The upper interior of the fixed clamp has two parallel sliding grooves. The movable clamp has two pull rods corresponding to the sliding grooves. A limiting ring is fixedly provided at one end of each pull rod inside the fixed clamp. A reduction spring is sleeved on the pull rod, located inside the fixed clamp, with its upper end abutting against the upper edge of the sliding groove and its lower end abutting against the limiting ring. The bone plate is detachably installed between the fixed clamp and the movable clamp. The front end of the second clamp arm is connected to a clamping claw.

[0007] As a further improvement of this utility model, elastic steel plates are respectively installed on the lower sides of the first clamp arm and the second clamp arm by fastening screws. The elastic steel plates always tend to separate the lower sides of the first clamp arm and the second clamp arm.

[0008] As a further improvement of this utility model, the elastic steel sheet includes a first elastic steel sheet and a second elastic steel sheet. The first elastic steel sheet is provided with a through hole, and the second elastic steel sheet is provided with a protrusion. The protrusion passes through the through hole to connect the first elastic steel sheet and the second elastic steel sheet.

[0009] As a further improvement of this utility model, the inner sides of the fixed clamp and the movable clamp are provided with anti-slip silicone pads.

[0010] As a further improvement of this utility model, the inner side of the clamping claw is provided with anti-slip texture.

[0011] As a further improvement of this utility model, finger rings are provided at the rear ends of both the first clamp arm and the second clamp arm.

[0012] By adopting the above technical solution, this utility model has the following beneficial effects:

[0013] This invention relates to a reduction clamp for fixing bone plates. Its structure is rationally designed. By incorporating a clamping assembly including a fixing clamp and a retractable movable clamp, it can firmly hold the bone plate, maintaining its relative position for successful fracture reduction and plate implantation. This ensures a secure, non-slip fit between the bone plate and the cortical bone. The retractable design of the movable clamp allows adjustment according to the width of different types of bone plates, ensuring a tight fit and quick clamping and releasing. During fracture reduction, the reduction clamp not only fixes the fracture ends with its own clamping force but also further stabilizes the overall structure through the connection between the clamping assembly and the bone plate, preventing slippage and significantly improving the accuracy and stability of fracture reduction.

[0014] The clamping assembly of this utility model adopts a double pull rod and double return spring design, which improves the clamping force of the fixed clamp and the movable clamp. Through the cooperation between the sliding groove and the return spring in the fixed clamp and the movable clamp, the pull rod can slide along the sliding groove when the movable clamp is pulled. When the bone plate is placed on the surface of the fixation seat, the movable clamp is released and the elasticity of the return spring pulls the movable clamp back to clamp the bone plate. The operation process is simple and convenient to use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the repositioning clamp for fixing bone plates according to the present invention;

[0016] Figure 2 for Figure 1 A structural diagram from another perspective;

[0017] Figure 3 This is a schematic diagram of the clamping assembly.

[0018] Figure 4 This is a diagram of the internal structure of the clamping assembly;

[0019] Figure 5 This is a diagram showing the usage state of a repositioning clamp for fixing a bone plate according to the present invention;

[0020] The components in the attached diagram are labeled as follows: 1. First clamp arm; 2. Second clamp arm; 3. Hinge shaft; 4. Clamping assembly; 5. Fixed clamp; 6. Movable clamp; 7. Slide groove; 8. Pull rod; 9. Limiting ring; 10. Return spring; 11. Bone plate; 12. Clamping claw; 13. Fastening screw; 14. First elastic steel sheet; 15. Second elastic steel sheet; 16. Through hole; 17. Protrusion; 18. Anti-slip silicone pad; 19. Anti-slip texture; 20. Finger ring; Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0023] Please see Figures 1-5 A reduction clamp for fixing a bone plate 11 includes a first clamp arm 1 and a second clamp arm 2, which are rotatably connected by a hinge shaft 3. A clamping assembly 4 for holding the bone plate 11 is connected to the front end of the first clamp arm 1. The clamping assembly 4 includes a fixed clamp 5 and a retractable movable clamp 6. The fixed clamp 5 is rectangular and serves as the clamping part of the reduction clamp. Compared to traditional reduction clamps, the clamping part of this invention is wider and longer. The upper interior of the fixed clamp 5 has two parallel sliding grooves 7. The movable clamp 6 has two pull rods 8 corresponding to the sliding grooves 7. A limiting ring 9 is fixedly provided at one end of the pull rod 8 inside the fixed clamp 5. A reduction spring 10 is sleeved on the pull rod 8. The return spring 10 is located inside the fixed clamp 5, with its upper end abutting against the upper edge of the slide groove 7, and its lower end abutting against the limiting ring 9. The bone plate 11 is detachably installed between the fixed clamp 5 and the movable clamp 6. The clamping assembly 4 adopts a design of double pull rods 8 and double return springs 10, which improves the clamping force of the fixed clamp 5 and the movable clamp 6, and can meet the clamping of bone plates 11 of different widths. Through the mutual cooperation between the slide groove 7 inside the fixed clamp 5, the return spring 10 and the movable clamp 6, the pull rod 8 can slide along the slide groove 7 when the movable clamp 6 is pulled. When the bone plate 11 is placed on the surface of the fixed seat, the movable clamp 6 is released, and the elasticity of the return spring 10 pulls the movable clamp 6 back to clamp the bone plate 11. The front end of the second clamp arm 2 is connected to a clamping claw 12.

[0024] This invention, through the inclusion of a clamping assembly 4 comprising a fixed clamp 5 and a retractable movable clamp 6, can securely clamp the bone plate 11, maintaining its relative position. The retractable design of the movable clamp 6 allows adjustment according to the width of different types of bone plates 11, ensuring a tight fit between the bone plate 11 and the clamping assembly 4. During fracture reduction, the reduction forceps not only fix the fracture ends with their own clamping force but also, through the connection between the clamping assembly 4 and the bone plate 11, further stabilize the overall structure, preventing slippage and significantly improving the accuracy and stability of fracture reduction.

[0025] As a further improvement of this utility model, elastic steel plates are respectively installed on the lower sides of the first clamp arm 1 and the second clamp arm 2 by fastening screws 13. The elastic steel plates always tend to separate the lower sides of the first clamp arm 1 and the second clamp arm 2, allowing the operator to easily control the size of the jaws of the reset clamp by applying and releasing force. In a specific embodiment, the elastic steel plates include a first elastic steel plate 14 and a second elastic steel plate 15. The first elastic steel plate 14 has a through hole 16, and the second elastic steel plate 15 has a protrusion 17. The protrusion 17 passes through the through hole 16 to connect the first elastic steel plate 14 and the second elastic steel plate 15. This elastic structure allows for easy adjustment of the elastic state, facilitating the adjustment of the jaw opening size.

[0026] In this embodiment, the inner sides of the fixed clamp 5 and the movable clamp 6 are provided with anti-slip silicone pads 18, which can improve the clamping force of the fixed clamp 5 and the movable clamp 6 on the steel sheet.

[0027] In this embodiment, the inner side of the gripper 12 is provided with anti-slip texture 19, which can increase the friction of the gripper 12 and prevent slippage.

[0028] In this embodiment, the rear ends of the first clamp arm 1 and the second clamp arm 2 are provided with finger rings 20. Compared with the traditional long-handled clamp arm structure, the finger rings 20 can be used to control the clamping force of the first clamp arm 1 and the second clamp arm 2 with fingers, which is more accurate and avoids the first clamp arm 1 and the second clamp arm 2 from clamping too tightly, causing misalignment between the bone pieces.

[0029] The method of using the reduction clamp for fixing the bone plate 11 according to this utility model is as follows: First, select a bone plate 11 of appropriate size according to the fracture site. Stretch the movable clamp 6 and place the bone plate 11 inside the fixing clamp 5 and the movable clamp 6. Release the movable clamp 6, and the elastic force of the reduction spring 10 will pull the movable clamp 6 back to clamp and tighten the bone plate 11. After placing the bone plate 11 in a suitable position at the fracture end, adjust the clamping force of the reduction clamp to perform a precise reduction operation on the fracture end. After reduction, the bone plate 11 can be fixed while keeping the reduction clamp stable, such as by screwing in screws. Finally, remove the reduction clamp.

[0030] This invention, through the design of the clamping component 4, can solve the problems of inconvenient operation and insufficient stability of reduction forceps in existing fracture reduction surgery, providing strong instrument support for the efficient and precise conduct of orthopedic surgery, and has broad clinical application prospects and medical industry value.

[0031] The above description is a detailed description of the preferred embodiments of the present utility model. However, the embodiments are not intended to limit the scope of the patent application of the present utility model. All equivalent changes or modifications made under the technical spirit of the present utility model should fall within the patent scope covered by the present utility model.

Claims

1. A reduction clamp for fixing a bone plate, comprising a first clamp arm (1) and a second clamp arm (2), wherein the first clamp arm (1) and the second clamp arm (2) are rotatably connected by a hinge shaft (3); characterized in that: The front end of the first clamp arm (1) is connected to a clamping assembly (4) for clamping the bone plate (11); the clamping assembly (4) includes a fixed clamp (5) and a retractable movable clamp (6). The upper end of the fixed clamp (5) is provided with two parallel sliding grooves (7). The movable clamp (6) is provided with two pull rods (8) corresponding to the sliding grooves (7). A limiting ring (9) is fixedly provided on one end of the pull rod (8) and located inside the fixed clamp (5). A return spring (10) is sleeved on the pull rod (8). The return spring (10) is located inside the fixed clamp (5), and the upper end of the return spring (10) can abut against the upper edge of the sliding groove (7). The lower end of the return spring (10) abuts against the limiting ring (9). The bone plate (11) is detachably installed between the fixed clamp (5) and the movable clamp (6). The front end of the second clamp arm (2) is connected to a clamping claw (12).

2. The repositioning clamp for fixing bone plates according to claim 1, characterized in that: The lower sides of the first clamp arm (1) and the second clamp arm (2) are respectively fitted with elastic steel plates by fastening screws (13). The elastic steel plates always tend to separate the lower sides of the first clamp arm (1) and the second clamp arm (2).

3. A reduction clamp for fixing a bone plate according to claim 2, characterized in that: The elastic steel sheet includes a first elastic steel sheet (14) and a second elastic steel sheet (15). The first elastic steel sheet (14) is provided with a through hole (16), and the second elastic steel sheet (15) is provided with a protrusion (17). The protrusion (17) passes through the through hole (16) to connect the first elastic steel sheet (14) and the second elastic steel sheet (15).

4. The repositioning clamp for fixing bone plates according to claim 1, characterized in that: The inner sides of the fixed clamp (5) and the movable clamp (6) are provided with anti-slip silicone pads (18).

5. A reduction clamp for fixing a bone plate according to claim 1, characterized in that: The gripper (12) has anti-slip texture (19) on its inner side.

6. A reduction clamp for fixing a bone plate according to claim 1, characterized in that: The rear ends of the first clamp arm (1) and the second clamp arm (2) are both provided with finger rings (20).

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