Tibial plateau collapse fracture reduction device
Through the tibial platform collapse fracture reduction device with integrated lifting and axial limiting mechanism, the problem of difficult reduction height and lateral displacement of the bone mass in minimally invasive methods is solved, and efficient and accurate fracture reduction and fixation are achieved, reducing the risk of traumatic arthritis.
Patent Information
- Application Number
- CN202510744317.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-05
- Publication Date
- 2025-07-22
AI Technical Summary
The existing minimally invasive methods are difficult to accurately control the reduction height when reducing the tibial platform collapse fracture, and lack an axial limiting mechanism, which leads to the bone mass being easily displaced laterally, affecting the reduction accuracy and increasing the risk of traumatic arthritis.
A tibial platform collapse fracture reduction device is designed, integrating the lifting mechanism and an axial limiting mechanism, precisely controlling the lifting height by rotary adjustment and laser ranging, and the limiting part is driven by gas buffer to fix the bone block to avoid lateral displacement.
It realizes efficient and accurate fracture reduction under minimally invasive operation, reduces trauma and complications, and forms a standardized reduction-fixation process, which is suitable for minimally invasive treatment of collapsed tibial fractures.
Smart Images
Figure CN120345976A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of medical devices, and in particular, to a reduction device for tibial plateau collapse fractures. Background Art
[0002] In tibial plateau fractures, if the reduction of the collapsed bone fragment is not ideal, it is likely to lead to traumatic arthritis. Although open reduction under direct vision can achieve the purpose of accurately reducing the collapsed bone fragment of the tibial plateau, it has a large trauma and a high risk of complications such as infection and joint stiffness. Therefore, the application of minimally invasive methods to reduce the collapsed bone fragment and then percutaneous pinning has become increasingly popular. Currently, the most commonly used minimally invasive method for reducing the collapsed bone fragment is to create a bone tunnel under the tibial plateau, and then insert a top rod through the bone tunnel under the collapsed bone fragment of the tibial plateau, and use a hammer to strike the top rod for reduction or use the top rod to pry and lift the collapsed bone fragment for reduction. However, it is very difficult to grasp the appropriate striking and prying force when reducing the collapsed area of the tibial plateau by the above method. Therefore, it is very difficult to determine the reduction height of the collapsed bone fragment, and problems such as insufficient reduction height or excessive height often occur easily. If the reduction height is insufficient, the surgical effect will be affected; if the collapsed bone fragment is lifted too high, it is necessary to open the joint cavity through another incision to press down the protruding bone fragment, and the articular cartilage may be torn off from the joint surface, further increasing the risk of traumatic arthritis. In addition, the existing device lacks an axial limiting mechanism for the fragmented bone before lifting and reduction, resulting in easy lateral displacement of the bone fragment during the lifting process, thereby affecting the reduction accuracy. Summary of the Invention
[0003] The present invention aims to solve the above-mentioned defects and provides a reduction device for tibial plateau collapse fractures.
[0004] To overcome the defects in the background art, the technical solution adopted by the present invention to solve its technical problems is: a reduction device for tibial plateau collapse fractures, including a gun body, the internal structure of which is a hollow structure, and the front end of which is a plug-in area. An elevation outlet for accommodating an elevation part and a limit outlet for accommodating a limit part are opened in the upper part of the plug-in area. The elevation mechanism and the axial limit mechanism are integrated inside the gun body. The elevation mechanism drives the elevation part to extend out through the elevation outlet for pushing the fragmented bone of the tibial plateau to the reduction position, and the axial limit mechanism drives the limit part to extend out through the limit outlet.
[0005] Further improvement includes that the elevation mechanism includes a rotating rod rotatably arranged inside the gun body and a driving gear ring sleeved on the rotating rod. The driving gear ring is meshed with a toothed plate connected to the bottom of the elevation part. When the driving gear ring rotates, the driving toothed plate pushes the elevation part to lift, so that the elevation part is pushed out to the outside through the elevation outlet, and the end of the rotating rod extends from the rear end of the gun body to the outside and is connected to the rotation adjustment part.
[0006] Further improvements include constructing reinforcing ribs inside the plugging area and on both sides of the toothed plate, thereby forming a guide groove structure to enable the toothed plate to move between the reinforcing ribs.
[0007] Further improvements include a threaded sleeve sleeved on the rotating rod being in threaded fit connection with a slider located inside the gun body, so as to drive the slider to move axially along the rotating rod through the rotational movement of the rotating rod, and a laser distance measuring sensor facing the slider is provided inside the gun body.
[0008] Further improvements include a guiding rib provided inside the gun body being matched with a guiding groove opened on the slider, so as to enable the slider to move along the guiding rib.
[0009] Further improvements include a locking mechanism for positioning and locking the slider being provided on the gun body.
[0010] Further improvements include that the axial limiting mechanism includes a limiter, a push rod provided inside the gun body, and a motor. A moving tooth sleeved on the push rod is meshed with a gear connected to the output end of the motor, and further drives the push rod to move axially through the cooperation of the gear and the moving tooth. An inner cavity for accommodating a limiting lifting part and a piston is constructed inside the limiter. One end of the push rod is connected with a piston, and the limiting part passes through the limiter and is connected with the limiting lifting part. When the push rod drives the piston to compress the inner cavity, the air in the inner cavity indirectly pushes the limiting lifting part and the limiting part to move together, so that the limiting part extends to the outside through the limiting outlet, and a limiting spring is also provided in the inner cavity. One end of the limiting spring abuts against the inner wall of the limiter, and the other end abuts against the limiting lifting part to push the limiting lifting part to keep the limiting part retracted into the plugging area.
[0011] Further improvements include that the rear end of the gun body is configured as a connecting part connected to the guiding mechanism.
[0012] Further improvements include that the guiding mechanism includes an arc-shaped part with an arc structure and a connecting head detachably connected to the connecting part. The connecting head is arranged below the arc-shaped part, and multiple groups of guiding holes for inserting Kirschner wires at different angles are opened on the arc-shaped part.
[0013] The beneficial effects of the present invention are as follows: This design integrates a lifting mechanism and an axial limiting mechanism. The lifting mechanism reduces the collapsed bone fragments, and the axial limiting mechanism limits the bone fragments to prevent the bone fragments from being laterally displaced during the lifting process. The rotation adjustment and laser ranging are used to accurately control the lifting height to avoid insufficient or excessive reduction. The axial limiting mechanism drives the limiting part to fix the bone block through gas buffering to prevent lateral displacement. The minimally invasive operation reduces trauma and complications, forming a standardized process of "reduction - fixation", which is applicable to the minimally invasive treatment of tibial plateau collapse fractures and provides an efficient and accurate solution for clinical practice. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The present invention will be further described below in conjunction with the drawings and embodiments.
[0015] Figure 1 is the front view of the present invention; Figure 2 is the partial cross - section of the present invention Figure 1 ; Figure 3 is the partial cross - section of the present invention Figure 2 ; Figure 4 is the front view of the guiding mechanism in the present invention; Figure 5 is Figure 4 the D - D cross - sectional view in; In the figure, 1 - connecting part, 2 - gun body, 3 - insertion area, 4 - lifting outlet, 5 - lifting part, 6 - limiting part, 7 - lifting mechanism, 8 - axial limiting mechanism, 9 - locking mechanism, 10 - guiding mechanism, 11 - limiting outlet; 701 - rotation adjustment part, 702 - guiding rib, 703 - slider, 704 - guiding groove, 705 - threaded sleeve, 706 - rotating rod, 707 - driving gear ring, 708 - toothed plate, 709 - reinforcing rib, 710 - laser ranging sensor; 801 - gear, 802 - moving tooth, 803 - motor, 804 - push rod, 805 - piston, 806 - inner cavity, 807 - limiting lifting part, 808 - limiter, 809 - limiting spring; 1001 - arc part, 1002 - connecting head, 1003 - guiding hole. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.
[0017] Reference Figure 1 , a reduction device for tibial plateau collapse fractures, comprising a gun body 2, the interior of which is configured as a hollow mechanism, and the front end of which is configured as a plug-in area 3 for inserting into a tibial bone hole. An elevation outlet 4 for accommodating an elevation part 5 and a limit outlet 11 for accommodating a limit part 6 are provided in the upper part of the plug-in area 3. A lifting mechanism 7 and an axial limiting mechanism 8 are integrated inside the gun body 2. The lifting mechanism 7 drives the elevation part 5 to extend out through the elevation outlet 4 for pushing the fragmented bone blocks of the tibial plateau to the reduction position, and the axial limiting mechanism 8 drives the limit part 6 to extend out through the limit outlet 11 to limit the axial movement of the fragmented bone blocks and ensure the reduction accuracy. This design is specifically used for the treatment of tibial plateau collapse, cooperating with Kirschner wires to fix the fragmented bone blocks to form a complete reduction and fixation process.
[0018] In this embodiment, reference Figure 2 and Figure 3 , the lifting mechanism 7 includes a rotating rod 706 rotatably arranged inside the gun body 2 and a driving gear ring 707 sleeved on the rotating rod 706. The driving gear ring 707 is meshed with a toothed plate 708 connected to the bottom of the elevation part 5. When the driving gear ring 707 rotates, the driving toothed plate 708 pushes the elevation part 5 to lift so that the elevation part 5 is pushed out to the outside through the elevation outlet 4. The end of the rotating rod 706 extends from the rear end of the gun body 2 to the outside and is connected to the rotation adjustment part 701. When manually turning the rotation adjustment part 701, the rotating rod 706 drives the driving gear ring 707 to rotate, and the elevation part 5 is pushed out through the elevation outlet 4 by the toothed plate 708.
[0019] In a further embodiment, in order to enhance the stability of the movement, reinforcing ribs 709 are constructed on both sides of the toothed plate 708 inside the plug-in area 3 to form a guide groove structure, so that the toothed plate 708 moves between the reinforcing ribs 709 to ensure that the toothed plate 708 moves smoothly in a straight line.
[0020] In a further embodiment, a threaded sleeve 705 sleeved on the rotating rod 706 is in threaded fit with a slider 703 located inside the gun body 2, so as to drive the slider 703 to move axially along the rotating rod 706 through the rotational movement of the rotating rod 706. A laser distance sensor 710 facing the slider 703 is provided inside the gun body 2 for accurately detecting the displacement distance of the slider 703.
[0021] In a further embodiment, a guiding rib 702 provided inside the gun body 2 is matched with a guiding groove 704 opened on the slider 703, so that the slider 703 moves along the guiding rib 702.
[0022] In a further embodiment, in order to ensure the stability of the lifting part 5 after lifting, a locking mechanism 9 for positioning and locking the slider 703 is provided on the gun body 2. After the slider 703 moves to a specific position, the slider 703 can be positioned and locked by the locking mechanism 9.
[0023] In this embodiment, referring to Figure 2 and Figure 3 , the axial limiting mechanism 8 includes a stopper 808, a push rod 804 disposed in the gun body 2, and a motor 803. A moving gear 802 sleeved on the push rod 804 is meshed with a gear 801 connected to the output end of the motor 803. Thus, the push rod 804 is axially moved by the cooperation of the gear 801 and the moving gear 802. An inner cavity 806 for accommodating a limiting lifting part 807 and a piston 805 is constructed in the stopper 808. One end of the push rod 804 is connected with the piston 805, and the limiting part 6 passes through the stopper 808 and is connected with the limiting lifting part 807. When the push rod 804 drives the piston 805 to compress the inner cavity 806, the air in the inner cavity 806 indirectly pushes the limiting lifting part 807 and the limiting part 6 to move together, so that the limiting part 6 extends to the outside through the limiting outlet 11. This design utilizes the buffering characteristics of gas compression to avoid damage to bone tissue caused by hard contact. A limiting spring 809 is further provided in the inner cavity 806. One end of the limiting spring 809 abuts against the inner wall of the stopper 808, and the other end abuts against the limiting lifting part 807 to push the limiting lifting part 807 so as to keep the limiting part 6 retracted into the insertion area 3.
[0024] In this embodiment, referring to Figure 4 and Figure 5 , the rear end of the gun body 2 is configured as a connecting part 1 connected to the guiding mechanism 10, and the guiding mechanism 10 is used for guiding during Kirschner wire drilling.
[0025] In a further embodiment, the guiding mechanism 10 includes an arc-shaped part 1001 with an arc-shaped structure and a connecting head 1002 detachably connected to the connecting part 1. The connecting head 1002 is disposed below the arc-shaped part 1001. A plurality of guiding holes 1003 for inserting Kirschner wires at different angles are formed in the arc-shaped part 1001. After the Kirschner wire passes through the guiding hole 1003, it is driven into the tibia, and multi-angle fixation can be achieved, which is suitable for fixation after positioning of fragmented bones after tibial plateau collapse.
[0026] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.
Claims
1. A tibial plateau collapse fracture reduction device, characterized in that, It includes a gun body (2) with its interior configured as a hollow mechanism and its front end configured as a plug-in area (3). An elevation outlet (4) for accommodating an elevation part (5) and a limit outlet (11) for accommodating a limit part (6) are provided at the upper part of the plug-in area (3). An elevation mechanism (7) and an axial limit mechanism (8) are integrated inside the gun body (2). The elevation mechanism (7) drives the elevation part (5) to extend out through the elevation outlet (4) for pushing the fragmented tibial plateau bone block to the reset position, and the axial limit mechanism (8) drives the limit part (6) to extend out through the limit outlet (11).
2. The tibial plateau collapse fracture reduction device according to claim 1, characterized in that: The elevation mechanism (7) includes a rotating rod (706) rotatably arranged inside the gun body (2) and a driving gear ring (707) sleeved on the rotating rod (706). The driving gear ring (707) is meshed with a toothed plate (708) connected to the bottom of the elevation part (5). When the driving gear ring (707) rotates, the driving toothed plate (708) pushes the elevation part (5) to lift so that the elevation part (5) is pushed out to the outside through the elevation outlet (4). The end of the rotating rod (706) extends from the rear end of the gun body (2) to the outside and is connected to the rotation adjustment part (701).
3. The tibial plateau collapse fracture reduction device according to claim 2, characterized in that: Reinforcing ribs (709) are constructed on both sides of the toothed plate (708) inside the plug-in area (3) to form a guide groove structure for the toothed plate (708) to move between the reinforcing ribs (709).
4. The tibial plateau collapse fracture reduction device according to claim 2, wherein: A threaded sleeve (705) sleeved on the rotating rod (706) is in threaded fit with a slider (703) located inside the gun body (2) to drive the slider (703) to move axially along the rotating rod (706) through the rotational movement of the rotating rod (706). A laser distance sensor (710) facing the slider (703) is provided inside the gun body (2).
5. The tibial plateau collapse fracture reduction device according to claim 4, wherein: Guide ribs (702) provided inside the gun body (2) are matched with guide grooves (704) opened on the slider (703) so that the slider (703) moves along the guide ribs (702).
6. The tibial plateau collapse fracture reduction device according to claim 4, wherein: A locking mechanism (9) for positioning and locking the slider (703) is provided on the gun body (2).
7. The tibial plateau collapse fracture reduction device according to claim 1, characterized in that: The axial limiting mechanism (8) includes a stopper (808), a push rod (804) disposed in the gun body (2), and a motor (803). A moving gear (802) sleeved on the push rod (804) is meshed with a gear (801) connected to the output end of the motor (803). Thus, the push rod (804) is driven to axially move by the cooperation of the gear (801) and the moving gear (802). An inner cavity (806) for accommodating a limiting and lifting part (807) and a piston (805) is constructed in the stopper (808). One end of the push rod (804) is connected to the piston (805), and the limiting part (6) passes through the stopper (808) and is connected to the limiting and lifting part (807). When the push rod (804) drives the piston (805) to compress the inner cavity (806), the air in the inner cavity (806) indirectly pushes the limiting and lifting part (807) and the limiting part (6) to move together, so that the limiting part (6) extends to the outside through the limiting outlet (11). A limiting spring (809) is also arranged in the inner cavity (806). One end of the limiting spring (809) abuts against the inner wall of the stopper (808), and the other end abuts against the limiting and lifting part (807) to push the limiting and lifting part (807) so as to keep the limiting part (6) retracted into the insertion area (3).
8. The reduction device for tibial plateau comminuted fracture according to claim 1, characterized in that: The rear end of the gun body (2) is configured as a connecting part (1) connected to the guiding mechanism (10).
9. The reduction device for tibial plateau comminuted fracture according to claim 8, wherein: The guiding mechanism (10) includes an arc-shaped part (1001) with an arc-shaped structure and a connecting head (1002) detachably connected to the connecting part (1). The connecting head (1002) is arranged below the arc-shaped part (1001). A plurality of guiding holes (1003) for inserting Kirschner wires at different angles are formed in the arc-shaped part (1001).