A modular reduction-guide two-in-one device for treating posterior malleolar fractures

Abstract

This utility model relates to the field of medical device technology, specifically disclosing a modular reduction-guiding two-in-one device for treating posterior ankle fractures. It includes a support and positioning component for support and a handle mounted on the support and positioning component. The support and positioning component includes a positioning block. Screw holes are provided at the diagonal corners of the top four sides of the positioning block, and connecting sleeves are threaded into the screw holes. A guide hole is provided in the center of the positioning block, and a reduction rod is inserted into the inner side of the guide hole to apply reduction pressure to the fracture fragment and promote its reduction. This utility model, through the cooperation of the handle and the fulcrum, allows the reduction rod to apply pressure in both the transverse and longitudinal directions, achieving multi-directional reduction of the fracture fragment and overcoming the shortcomings of existing technologies where the direction of force application is limited and the position of the fracture fragment is difficult to adjust precisely.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically a modular reduction-guidance two-in-one device for treating posterior ankle fractures. Background Technology

[0002] The ankle joint is one of the most important weight-bearing and movement joints of the lower limbs, and its stability is maintained by the tibia, fibula, talus, and surrounding ligaments. The posterior malleolus, formed by the extension of the posterior lip of the tibia, plays a crucial role in load transmission, preventing posterior talar dislocation, and maintaining rotational stability. Clinically, posterior malleolar fractures are commonly seen in high-energy traumatic injuries, and the fracture types are diverse, ranging from minor avulsion fractures to significantly displaced fragments. For posterior malleolar fractures with significant displacement, open reduction and internal fixation are usually required to restore joint stability and function.

[0003] However, due to the dense distribution of nerves and blood vessels in the posterior ankle region, extensive soft tissue dissection is required during surgery, and the limited local operating space makes fracture exposure, reduction, and fixation extremely challenging. Current surgical methods often rely on multiple intraoperative fluoroscopic examinations to confirm reduction and internal fixation positions, which not only prolongs surgical time and increases the learning difficulty for medical staff but also poses a risk of ionizing radiation exposure to both patients and medical personnel. Furthermore, repeated adjustments to the internal fixation device during implantation can easily cause secondary damage to the ankle bone, affecting postoperative recovery. Therefore, there is an urgent need for a device that can simultaneously achieve precise fracture reduction and internal fixation guidance within a limited surgical space to improve surgical efficiency, reduce risks, and enhance treatment outcomes. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a modular reduction-guiding two-in-one device for treating posterior ankle fractures, which solves the problems of limited reduction direction, unstable temporary fixation, and operational interference in existing technologies.

[0005] This utility model discloses a modular reduction-guidance two-in-one device for treating posterior ankle fractures, comprising a support and positioning component for support and a handle disposed on the support and positioning component. The support and positioning component includes a positioning block, and the top four sides of the positioning block are provided with screw holes at the diagonal corners. A connecting sleeve is threaded into the screw holes. A guide hole is provided in the middle of the positioning block, and a reduction top rod is inserted into the inner side of the guide hole to apply reduction pressure to the fracture fragment to promote the reduction of the fracture fragment. The connecting sleeve includes a cylindrical body with a through-area that is completely penetrated in the middle of the cylindrical body, and an internal fixation device is driven into the through-area of ​​the cylindrical body for fracture reduction.

[0006] As a further improvement of this utility model, one side of the positioning block is connected to the handle, and one end of the handle is set at a 150° angle with the positioning block.

[0007] As a further improvement of this utility model, a fulcrum is provided on one side of the positioning block. The fulcrum is used to cooperate with the handle and to apply reduction pressure to the fracture fragment along the fulcrum to promote the reduction of the fracture fragment.

[0008] As a further improvement of this utility model, a positioning hole is provided on one side of the positioning block between one of the screw holes and the guide hole. The positioning hole is completely through and is used to insert steel needles to temporarily fix the fractured ankle fragments.

[0009] As a further improvement of this utility model, one end of the connecting sleeve is provided with a threaded protrusion, which is adapted to the threaded hole on the positioning block for fixing the sleeve.

[0010] As a further improvement of this utility model, the reset top rod includes a rod body, one end of which is provided with a plug block, which is adapted to the positioning hole on the positioning block.

[0011] As a further improvement of this utility model, the repositioning rod and the handle are respectively used to apply tension in the horizontal and vertical directions to apply pressure to the fracture fragments and force the fracture fragments to reposition.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention, through the cooperation of the handle and the fulcrum, allows the reduction rod to apply pressure in both the transverse and longitudinal directions, thereby achieving multi-directional reduction of the fracture fragments and overcoming the shortcomings of the prior art, such as limited force direction and difficulty in accurately adjusting the position of the fracture fragments. The through-hole on the positioning block allows for the insertion of steel pins for temporary fixation after reduction, effectively preventing displacement of the fracture fragments before the implantation of internal fixation devices and solving the problem of insufficient temporary fixation methods in existing technologies. The threaded connection structure between the connecting sleeve and the positioning block ensures the stability of the fixation and facilitates quick disassembly and replacement according to surgical needs, enabling continuous operation of repositioning, temporary fixation and final fixation, reducing the need for multiple adjustments of the internal fixation device; The combination of the reduction rod and the positioning hole ensures the guiding accuracy during the force application process and reduces interference with the surrounding soft tissues. Reduction and fixation can be completed within a limited surgical incision and field of vision, reducing the number of intraoperative fluoroscopy sessions and surgical time, mitigating the ionizing radiation damage to patients caused by repeated fluoroscopy, and helping to improve the clinical prognosis of patients with posterior malleolar fractures. Attached Figure Description

[0013] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a three-dimensional structural diagram of the handle and support positioning component of this utility model; Figure 2 This is a front view structural diagram of the handle and support positioning assembly of this utility model; Figure 3 This is a three-dimensional structural diagram of the handle and support positioning component of this utility model from another angle; Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure of the middle AA section; Figure 5 This is a three-dimensional structural diagram of the connecting sleeve of this utility model; Figure 6 This is a front view structural diagram of the connecting sleeve of this utility model; Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure of the middle BB section; Figure 8 This is a front view schematic diagram of the resetting top rod structure of this utility model; Figure 9 This is a front view of the handle and support positioning assembly of this utility model.

[0014] In the diagram: 1. Handle; 2. Support and positioning assembly; 3. Connecting sleeve; 4. Reset top rod; 21. Positioning block; 22. Positioning hole; 23. Screw hole; 24. Guide hole; 25. Pivot point; 31. Cylinder body; 32. Through area; 33. Threaded protrusion; 41. Rod body; 42. Connecting block. Detailed Implementation

[0015] The following illustrations will reveal several embodiments of the present invention. For clarity, many physical details will be described in the following description. However, it should be understood that these physical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these physical details are not essential. Furthermore, for the sake of simplicity, some conventional structures and components will be shown in a simple schematic manner in the illustrations.

[0016] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0017] In the surgical treatment of ankle fractures, especially when it involves the reduction and fixation of posterior malleolar fracture fragments, medical staff often need to complete the anatomical reduction and internal fixation of the fracture fragments within a limited surgical incision and field of vision. Current methods mostly rely on medical staff applying force directly to the fracture fragments using a handheld reduction device, or using temporary clamping devices for fixation. However, these methods have the following problems during operation: the direction of force application is limited during reduction, making it difficult to accurately adjust the position of the fracture fragments in different directions; temporary fixation methods are insufficient, and the fracture fragments are prone to displacement before the internal fixation device is implanted; within the limited surgical space, reduction and fixation operations interfere with each other, increasing surgical time and the number of fluoroscopy cycles.

[0018] Based on this, this application provides a modular reduction-guiding dual-function device for treating posterior ankle fractures. Please refer to [link to relevant documentation]. Figures 1 to 6 The device includes a support positioning component 2 for support and a handle 1 disposed on the support positioning component 2. The support positioning component 2 includes a positioning block 21. Screw holes 23 are provided at the diagonal corners of the top four sides of the positioning block 21. A connecting sleeve 3 is threaded into the screw holes 23. A guide hole 24 is provided in the middle of the positioning block 21. A reduction top rod 4 is inserted into the inner side of the guide hole 24 to apply reduction pressure to the fracture fragment to promote the reduction of the fracture fragment. The connecting sleeve 3 includes a cylinder 31, with a through-area 32 that is fully penetrated in the middle of the cylinder 31, and an internal fixation device is inserted along the through-area 32 of the cylinder 31 for fracture reduction.

[0019] The support and positioning component 2 includes a positioning block 21, which has a plate-like structure. Screw holes 23 are located diagonally around the top four edges of the block. Connecting sleeves 3 are installed within these screw holes 23 via threaded connections. The connecting sleeves 3 can be disassembled or replaced as needed during surgery. A guide hole 24 is located in the center of the positioning block 21, extending along its thickness. A reduction rod 4 can be inserted into the guide hole 24. During use, one end of the reduction rod 4 extends out of the guide hole 24 and rests against the surface of the fracture fragment. The surgeon applies axial thrust, causing the fracture fragment to move in the anatomical reduction direction, thereby promoting fracture fragment reduction.

[0020] The connecting sleeve 3 includes a cylindrical body 31, with a fully penetrating through-section 32 at its axial center. During surgery, internal fixation devices (such as screws) can be driven into the fracture site along this through-section 32 to fix the reduced fracture fragments. The threaded connection between the connecting sleeve 3 and the positioning block 21 ensures stability while allowing for easy adjustment of the installation angle and position of the connecting sleeve 3 according to the fracture location and surgical approach, thus adapting to the anatomical differences of different patients.

[0021] In practical use, the surgeon first places the support and positioning component 2 at the surgical incision site for the posterior malleolus fracture, ensuring stable contact between the positioning block 21 and the bone surface. Then, the reduction rod 4 is inserted through the guide hole 24, and appropriate reduction pressure is applied to the fracture fragment under direct vision or fluoroscopic guidance. After the fracture fragment is reduced to a satisfactory position, the surgeon can insert the internal fixation device into the fracture fragment and adjacent bone surface through the through-area 32 of the connecting sleeve 3, achieving stable fixation. This device reduces the need for multiple adjustments to the internal fixation device during reduction and fixation, decreases the number of intraoperative fluoroscopy sessions, thereby shortening the operation time and reducing ionizing radiation exposure.

[0022] Specifically: First, place the handle 1 and the support positioning component 2 on the posterior ankle fracture fragment. The fulcrum 25 above the support positioning component 2 should be placed on the fracture fragment below the fracture line. Apply longitudinal reduction pressure to the fracture fragment along the fulcrum 25 with the handle 1 to promote downward reduction of the fracture fragment. Then, apply transverse reduction pressure to the fracture fragment along the guide hole 24 with the reduction rod 4 to promote forward reduction of the fracture fragment. After satisfactory reduction, insert a steel pin through the positioning hole 22 to temporarily fix the posterior ankle fracture fragment. After confirming satisfactory reduction of the fracture fragments under intraoperative fluoroscopy, the connecting sleeve 3 was installed in one of the screw holes 23 (at this time, the screw hole 23 set above). The internal fixation device was driven in along the connecting sleeve 3 and then the connecting sleeve 3 was removed. The connecting sleeve 3 was then installed in the other screw hole 23 in sequence. The internal fixation device was driven in along the sleeve again and then the guide sleeve was removed. Intraoperative fluoroscopy was performed again to confirm that the position of the internal fixation device was correct, so that the reduction of the fracture fragments met the requirements.

[0023] Please see Figure 1 , Figure 2 as well as Figure 3 One side of the positioning block 21 is connected to the handle 1, and one end of the handle 1 is set at a 150° angle to the positioning block 21.

[0024] A fulcrum 25 is provided on one side of the positioning block 21. The fulcrum 25 is used to cooperate with the handle 1 to apply reduction pressure to the fracture fragment along the fulcrum 25 to promote the reduction of the fracture fragment.

[0025] A positioning hole 22 is provided on one side of the positioning block 21 between one of the screw holes 23 and the guide hole 24. The positioning hole 22 is completely through and is used to insert steel needles to temporarily fix the fractured ankle fragments.

[0026] In this embodiment, a handle 1 is fixedly connected to one side of the positioning block 21. One end of the handle 1 is fixed to the outer side of the positioning block 21 by welding or thread fastening, so that the handle 1 can stably transmit external force during operation. The handle 1 is designed to facilitate medical personnel to hold and operate the device within the limited surgical incision.

[0027] A fulcrum 25 is also provided on one side of the positioning block 21. The fulcrum 25 can be a protrusion or a pin structure, and its position is opposite to that of the handle 1. In use, the handle 1 can generate a lever effect around the fulcrum 25, applying reduction pressure towards the fracture fragment through the handle 1, so that the end of the reduction rod 4 generates a stable pushing force on the fracture fragment, thereby promoting the reduction of the fracture fragment to its anatomical position. The cooperation between the fulcrum 25 and the handle 1 can achieve effective force transmission in a small operating space, reducing the difficulty for medical staff to apply force directly to the fracture fragment.

[0028] Furthermore, a positioning hole 22 is provided on one side of the positioning block 21, located between one of the screw holes 23 and the guide hole 24. The positioning hole 22 extends completely through the thickness of the positioning block 21, and its diameter is adapted to the specifications of commonly used surgical needles. During the operation, medical staff can insert a steel needle into the fracture fragment and adjacent bone surface through the positioning hole 22 to achieve temporary fixation. This temporary fixation can keep the fracture fragment stable after reduction, facilitating the subsequent implantation of an internal fixation device through the through area 32 of the connecting sleeve 3 for final fixation.

[0029] In the specific operation, medical staff first place the support and positioning component 2 at the surgical incision site, ensuring that the positioning block 21 fits against the bone surface. Through the cooperation of the handle 1 and the fulcrum 25, the reduction rod 4 applies appropriate pressure to the fracture fragment to complete the reduction. After the reduction is in place, a steel pin is inserted through the positioning hole 22 for temporary fixation to prevent displacement of the fracture fragment during the implantation of internal fixation devices. Finally, medical staff insert screws and other internal fixation devices through the through-area 32 of the connecting sleeve 3 to achieve stable fixation of the fracture fragment.

[0030] This structure enables fracture reduction, temporary fixation, and final fixation to be performed sequentially within a limited surgical field and operating space, reducing the need for multiple adjustments to internal fixation devices, decreasing the number of intraoperative fluoroscopy sessions, and helping to improve surgical efficiency and reduction accuracy.

[0031] Please see Figure 5 , Figure 6 , Figure 7 , Figure 8 as well as Figure 9 One end of the connecting sleeve 3 is provided with a threaded protrusion 33, which is adapted to the screw hole 23 on the positioning block 21 for fixing the sleeve.

[0032] The reset top rod 4 includes a rod body 41, one end of which is provided with a plug block 42, which is adapted to the positioning hole 22 on the positioning block 21.

[0033] The reduction rod 4 and the handle 1 apply tension laterally and longitudinally to compress the fracture fragments and force them to be reduced.

[0034] One end of the connecting sleeve 3 is machined with a threaded protrusion 33. The outer diameter of the threaded protrusion 33 matches the inner diameter of the screw hole 23 on the positioning block 21. In use, the threaded protrusion 33 can be screwed into the screw hole 23 of the positioning block 21 along the thread direction, thereby reliably fixing the connecting sleeve 3 on the positioning block 21. This connection method facilitates the disassembly or replacement of the connecting sleeve 3 as needed during the operation, while ensuring the stability of the connection.

[0035] The reset push rod 4 includes a rod body 41, and one end of the rod body 41 is provided with a plug block 42. The external dimensions of the plug block 42 are adapted to the positioning hole 22 on the positioning block 21. After the plug block 42 is inserted into the positioning hole 22, it can maintain the axial position of the reset push rod 4 under the guidance of the positioning block 21, and avoid displacement during the application of force.

[0036] In practice, the reduction rod 4 is used in conjunction with the handle 1. Depending on the location and reduction direction of the fracture fragments, traction or pushing forces can be applied laterally or longitudinally. When lateral force is required, medical personnel can move the reduction rod 4 laterally through the handle 1, causing its end to exert lateral pressure on the fracture fragments. When longitudinal force is required, it can be pushed or pulled along the axial direction of the reduction rod 4, causing its end to exert longitudinal pressure on the fracture fragments. In this way, appropriate reduction forces can be applied to the fracture fragments in different directions, gradually returning them to their anatomical position.

[0037] During the repositioning process, the threaded connection between the connecting sleeve 3 and the positioning block 21 ensures stable support for the repositioning rod 4 when force is applied, while the cooperation between the insertion block 42 and the positioning hole 22 ensures the guiding accuracy of the repositioning rod 4. This structure enables multi-directional repositioning operations within a limited surgical incision, reduces interference with surrounding soft tissues, and helps improve the accuracy and efficiency of surgical repositioning.

[0038] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A modular reduction-guiding two-in-one device for treating posterior ankle fractures, comprising a support and positioning assembly (2) for support and a handle (1) disposed on the support and positioning assembly (2), characterized in that: The support positioning component (2) includes a positioning block (21). The top four sides of the positioning block (21) are provided with screw holes (23) at the diagonal corners. A connecting sleeve (3) is threaded into the screw holes (23). A guide hole (24) is provided in the middle of the positioning block (21). A reduction top rod (4) is inserted into the inner side of the guide hole (24) to apply reduction pressure to the fracture fragment to promote the reduction of the fracture fragment. The connecting sleeve (3) includes a cylinder (31), and a through area (32) is provided in the middle of the cylinder (31). An internal fixation device is inserted along the through area (32) of the cylinder (31) for fracture reduction.

2. The modular reduction-guiding dual-function device for treating posterior ankle fractures according to claim 1, characterized in that: One side of the positioning block (21) is connected to the handle (1), and one end of the handle (1) is set at a 150° angle with the positioning block (21).

3. The modular reduction-guiding dual-function device for treating posterior ankle fractures according to claim 1, characterized in that: The positioning block (21) has a fulcrum (25) on one side. The fulcrum (25) is used to cooperate with the handle (1) to apply reduction pressure to the fracture fragment along the fulcrum (25) to promote the reduction of the fracture fragment.

4. The modular reduction-guiding dual-function device for treating posterior ankle fractures according to claim 1, characterized in that: The positioning block (21) has a positioning hole (22) on one side located between one of the screw holes (23) and the guide hole (24). The positioning hole (22) is completely through and is used to insert steel needles to temporarily fix the fractured ankle bone fragments.

5. The modular reduction-guiding dual-function device for treating posterior ankle fractures according to claim 1, characterized in that: One end of the connecting sleeve (3) is provided with a threaded protrusion (33), which is adapted to the screw hole (23) on the positioning block (21) for fixing the sleeve.

6. The modular reduction-guiding dual-function device for treating posterior ankle fractures according to claim 1, characterized in that: The reset top rod (4) includes a rod body (41), one end of which is provided with a plug block (42), which is adapted to the positioning hole (22) on the positioning block (21).

7. The modular reduction-guiding dual-function device for treating posterior ankle fractures according to claim 1, characterized in that: The repositioning rod (4) and handle (1) apply tension laterally and longitudinally to apply pressure to the fracture fragments and force them to reposition.

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