Acetabular fossa positioning tool for hip joint surgery

Abstract

The utility model discloses an acetabular fossa positioning tool for hip joint surgery, and relates to the technical field of total hip joint replacement. The damping device comprises a mounting frame, a mounting hole is formed in one side of the mounting frame, a damping ball joint is mounted on one side of the mounting frame, a ball body is mounted in the damping ball joint, a connecting rod is fixedly connected to one side of the ball body, a supporting rod is arranged on one side of the connecting rod, and the supporting rod is fixedly connected to the other side of the mounting frame. An extension rod is arranged on one side of the supporting rod, and a fixing shell is arranged on one side of the extension rod. According to the utility model, the pressing block is pressed downwards, the spring is compressed under stress, then the pressing block descends into the positioning groove, and then the extension rod is dragged to enable the movable rod to move in the supporting rod in a limited manner; and the pressing block is moved to the interior of the next clamping groove and then is reset to the interior of the clamping groove by virtue of the elasticity of the spring, so that the current extending distance is positioned, and the effect of conveniently adjusting the use length is achieved.

Description

Technical Field

[0001] This invention belongs to the field of total hip arthroplasty technology, and in particular relates to a tool for acetabular fossa positioning used in hip joint surgery. Background Technology

[0002] Total hip arthroplasty (THO) is a relatively new surgical procedure that has emerged in recent years. Building upon traditional THO, it improves surgical approaches, methods, and tools, allowing for the placement and replacement of the hip prosthesis within a relatively small incision of 5-10 cm. The goal of THO is to reconstruct a stable, weight-bearing, and functionally sound hip joint that is effective long-term. With advancements in prostheses and surgical techniques, prostheses can now survive for 10-20 years. However, the increasing trend of younger patients undergoing joint replacement surgery places higher demands on joint lifespan. Even with the same hip prosthesis, different placement positions and angles result in different stress transmission patterns; only precise hip joint reconstruction can maximize its lifespan. Furthermore, the placement position and angle of the hip prosthesis have a crucial impact on its clinical function. Poor placement of the acetabular prosthesis can lead to dislocation, impingement, increased wear, and changes in joint range of motion.

[0003] For example, application number CN213910567U discloses an acetabular fossa positioning tool for hip joint surgery, comprising a fixation pin, a positioning rod, and a fixation frame. The fixation pin includes a pin shaft, a pin head, and a pin head housing, with the pin head having a first spherical hole or a first prism hole. The positioning rod has a first ball head and a second ball head at its two ends. The fixation frame includes a clamp and a connecting seat, with the connecting seat having a second spherical hole or a second prism hole. The first ball head engages with the first spherical hole or is approximately tangent to the side of the first prism hole and can rotate within it. The second ball head engages with the second spherical hole or is approximately tangent to the side of the second prism hole and can rotate within it. This utility model's acetabular fossa positioning tool for hip joint surgery has a simple structure, is easy to install, disassemble, and use, rotates flexibly, and provides precise positioning, offering accurate reference for the correct installation of hip joint prostheses.

[0004] While the aforementioned device is simple in structure, easy to install, disassemble, and use, and offers flexible rotation and precise positioning, providing accurate reference for the correct installation of hip joint prostheses, its use is somewhat limited due to varying hip joint growth patterns among patients and the specific installation position on the positioning device. This results in inconvenience and an inability to adjust the extension length as needed. Therefore, we provide an acetabular fossa positioning tool for hip joint surgery to address these issues. Utility Model Content

[0005] The purpose of this invention is to provide an acetabular fossa positioning tool for hip joint surgery. By using an adjusting component, a connecting rod, and an extension rod in combination, it solves the problem that existing positioning tools cannot adjust their length according to usage needs.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to an acetabular fossa positioning tool for hip joint surgery, comprising a mounting frame, a mounting hole on one side of the mounting frame, a damping ball joint mounted on one side of the mounting frame, a ball head body installed inside the damping ball joint, a connecting rod fixedly connected to one side of the ball head body, a support rod on one side of the connecting rod, an extension rod on one side of the support rod, a fixing shell on one side of the extension rod, and an adjusting component inside the connecting rod.

[0008] The adjusting component includes a movable rod and a slot. The movable rod is movably connected to the inside of the support rod, and the slot is opened inside the connecting rod. A positioning groove is opened on one side of the top of the movable rod. A spring is fixedly connected to the bottom of the inner cavity of the positioning groove, and a pressing block is fixedly connected to the top of the spring.

[0009] The present invention is further configured such that sliders are fixedly connected to both the front and rear sides of the movable rod, and openings for use with the sliders are provided on both the front and rear sides of the inner cavity of the connecting rod.

[0010] The present invention is further configured such that a threaded sleeve is provided at the top of the damping ball joint, a screw is provided inside the threaded sleeve, a first torsion block is fixedly connected to the top of the screw, and the bottom of the first torsion block penetrates into the interior of the damping ball joint and is fixedly connected to a pressing block.

[0011] The present invention is further configured such that a pressure strip is fixedly connected to the bottom of the pressing block, and the pressure strip is made of rubber.

[0012] The present invention is further configured such that a fixed disk is rotatably connected inside the fixed shell, an extension block is fixedly connected to one side of the fixed disk, a connecting frame is rotatably connected to the front and rear sides of the extension block, and a positioning plate is fixedly connected to one side of the connecting frame.

[0013] The present invention is further configured such that limiting disks are fixedly connected to both the front and rear sides of the extension block, and a fixing plate is fixedly connected to one side of the connecting frame. The limiting disks and the fixing plate are both provided with positioning holes for positioning the connecting frame.

[0014] The present invention is further configured such that a second toggle block is provided on the top of the positioning plate, and the bottom of the second toggle block extends through to the bottom of the positioning plate and is fixedly connected with a threaded nail.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model involves pressing down the pressing block, which compresses the spring. The pressing block then descends into the positioning groove. The extension rod is then pulled to move the movable rod within the support rod, causing the pressing block to move into the next slot. The spring's elasticity then resets the pressing block to the slot, thus positioning the current extension distance and facilitating the adjustment of the usage length.

[0017] 2. By twisting the first torsion block, the screw can rotate inside the threaded sleeve. At this time, the pressure block will be forced to lower the pressure strip to fit the ball head, thereby enhancing the stability of the current rotation adjustment position.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A three-dimensional view of the acetabular fossa localization tool used in hip joint surgery;

[0021] Figure 2 A rotating diagram of an acetabular fossa positioning tool used in hip surgery;

[0022] Figure 3 A partial structural cross-sectional view of an acetabular fossa localization tool used in hip surgery;

[0023] Figure 4 An exploded view of the local structure of an acetabular fossa localization tool used in hip surgery;

[0024] Figure 5 A acetabular fossa positioning tool for use in hip surgery Figure 3 A magnified view of A in the middle.

[0025] In the attached diagram: 1. Mounting bracket; 2. Mounting hole; 3. Damping ball joint; 4. Ball head body; 5. Connecting rod; 6. Support rod; 7. Extension rod; 8. Fixing shell; 9. Adjusting component; 901. Movable rod; 902. Slot; 903. Positioning slot; 904. Spring; 905. Pressing block; 906. Slider; 10. Threaded sleeve; 11. Screw; 12. First torsion block; 13. Pressing block; 14. Pressure strip; 15. Fixing plate; 16. Extension block; 17. Connecting bracket; 18. Positioning plate; 19. Limiting plate; 20. Fixing plate; 21. Positioning hole; 22. Second torsion block; 23. Threaded pin. Detailed Implementation

[0026] 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 skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation Example 1

[0028] Please see Figure 1-5 This utility model relates to an acetabular fossa positioning tool for hip joint surgery, comprising a mounting frame 1, a mounting hole 2 on one side of the mounting frame 1, a damping ball joint 3 mounted on one side of the mounting frame 1, a ball head 4 installed inside the damping ball joint 3, a connecting rod 5 fixedly connected to one side of the ball head 4, a support rod 6 on one side of the connecting rod 5, an extension rod 7 on one side of the support rod 6, a fixing shell 8 on one side of the extension rod 7, and an adjusting component 9 inside the connecting rod 5; the adjusting component 9 includes a movable rod 901 and a slot 902, the movable rod 901 is movably connected to the inside of the support rod 6, the slot 902 is opened inside the connecting rod 5, a positioning groove 903 is opened on one side of the top of the movable rod 901, a spring 904 is fixedly connected to the bottom of the inner cavity of the positioning groove 903, a pressing block 905 is fixedly connected to the top of the spring 904, sliders 906 are fixedly connected to both the front and rear sides of the movable rod 901, and openings for use with the sliders 906 are opened on both the front and rear sides of the inner cavity of the connecting rod 5.

[0029] Specifically: By pressing down on the pressing block 905, the spring 904 is compressed, and the pressing block 905 descends into the positioning groove 903. Then, the extension rod 7 is pulled to limit the movement of the movable rod 901 inside the support rod 6. During the movement of the support rod 6, the slider 906 is also limited to move inside the connecting rod 5, thereby preventing the movable rod 901 from rotating inside the connecting rod 5 and causing the pressing block 905 to disengage from the positioning groove 903. The pressing block 905 is then moved to the next slot 902, and the spring 904 elastically returns the pressing block 905 to the slot 902, thus positioning the current extension distance. Specific Implementation Example 2

[0031] Please see Figure 1-5 Based on the first specific embodiment, a threaded sleeve 10 is provided on the top of the damping ball joint 3, a screw 11 is provided inside the threaded sleeve 10, a first torsion block 12 is fixedly connected to the top of the screw 11, the bottom of the first torsion block 12 penetrates into the interior of the damping ball joint 3 and is fixedly connected to a pressing block 13, and a pressure strip 14 is fixedly connected to the bottom of the pressing block 13. The pressure strip 14 is made of rubber.

[0032] Specifically: By twisting the first torsion block 12, the screw 11 can rotate inside the threaded sleeve 10. At this time, the pressure block 13 will be forced to lower the pressure strip 14 to fit against the ball head 4, thereby enhancing the stability of the current rotation adjustment position. The pressure strip 14 is made of rubber, which can increase the friction between the pressure block 13 and the ball head 4. Specific Implementation Example 3

[0034] Please see Figure 1-5 Based on specific embodiments one and two, a fixed plate 15 is rotatably connected inside the fixed shell 8. An extension block 16 is fixedly connected to one side of the fixed plate 15. A connecting frame 17 is rotatably connected to the front and rear sides of the extension block 16. A positioning plate 18 is fixedly connected to one side of the connecting frame 17. A limiting plate 19 is fixedly connected to both the front and rear sides of the extension block 16. A fixed plate 20 is fixedly connected to one side of the connecting frame 17. Positioning holes 21 for positioning the connecting frame 17 are opened inside the limiting plate 19 and the fixed plate 20. A second toggle block 22 is provided on the top of the positioning plate 18. The bottom of the second toggle block 22 extends through to the bottom of the positioning plate 18 and is fixedly connected with a threaded nail 23.

[0035] Specifically: The extension block 16 can be rotated easily by the fixed plate 15 and the fixed shell 8, and the connecting frame 17 can be rotated flexibly by the extension block 16. The limiting plate 19 and the fixed plate 20 can be adjusted to the final position of the connecting frame 17 by aligning the screws with the inside of the fixed plate 20 and the positioning hole 21, thereby achieving the effect of fixing the position of the connecting frame 17. The threaded nail 23 can be rotated by turning the second toggle block 22, so as to facilitate the insertion of the threaded nail 23 into the patient's bone for fixation. Then, the connecting frame 17 can be adjusted at any angle by the extension block 16 and the fixed plate 15. Subsequently, when the user needs to adjust the length of use.

[0036] The working principle of this utility model is as follows: First, the mounting bracket 1 is fixed on the positioning device. Then, the threaded nail 23 is aligned with the rear end of the patient's anterior superior iliac spine. By pressing down on the pressing block 905, the spring 904 will be compressed. Subsequently, the pressing block 905 descends into the positioning groove 903. Then, the extension rod 7 is pulled to make the movable rod 901 move within the support rod 6. During the movement of the support rod 6, the slider 906 will also move within the connecting rod 5, thus preventing the movable rod 901 from rotating within the connecting rod 5 and causing the pressing block 905 to disengage from the positioning groove 903. This allows the pressing block 905 to move into the next slot 902, and then the elasticity of the spring 904 will keep the pressing block 905 in place. The screw is reset to the inside of the slot 902 to locate the current extension distance. When the user needs to locate the final position of the threaded nail 23 and the connecting bracket 17, the screw can be used to locate it through the positioning hole 21 on the positioning plate 18 and the limiting plate 19. If the user needs to locate one end of the mounting bracket 1, the screw 11 can be rotated inside the threaded sleeve 10 by turning the first torsion block 12. At this time, the pressure block 13 will be forced to lower the pressure strip 14 to fit against the ball head 4, thereby enhancing the stability of the current rotation adjustment position. The pressure strip 14 is made of rubber, which can increase the friction between the pressure block 13 and the ball head 4, thereby locating the position of the connecting rod 5.

[0037] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An acetabular fossa positioning tool for hip joint surgery, comprising a mounting frame (1), characterized in that: The mounting bracket (1) has a mounting hole (2) on one side, a damping ball joint (3) is mounted on one side of the mounting bracket (1), a ball head (4) is installed inside the damping ball joint (3), a connecting rod (5) is fixedly connected to one side of the ball head (4), a support rod (6) is provided on one side of the connecting rod (5), an extension rod (7) is provided on one side of the support rod (6), a fixing shell (8) is provided on one side of the extension rod (7), and an adjusting component (9) is provided inside the connecting rod (5). The adjusting component (9) includes a movable rod (901) and a slot (902). The movable rod (901) is movably connected to the inside of the support rod (6). The slot (902) is opened inside the connecting rod (5). A positioning groove (903) is opened on one side of the top of the movable rod (901). A spring (904) is fixedly connected to the bottom of the inner cavity of the positioning groove (903). A pressing block (905) is fixedly connected to the top of the spring (904).

2. The acetabular fossa positioning tool for hip joint surgery according to claim 1, characterized in that, The movable rod (901) is fixedly connected to sliders (906) on both the front and rear sides, and the inner cavity of the connecting rod (5) is provided with openings on both the front and rear sides for use with sliders (906).

3. The acetabular fossa positioning tool for hip joint surgery according to claim 1, characterized in that, The top of the damping ball joint (3) is provided with a threaded sleeve (10), and the inside of the threaded sleeve (10) is provided with a screw (11). The top of the screw (11) is fixedly connected with a first torsion block (12), and the bottom of the first torsion block (12) extends through the inside of the damping ball joint (3) and is fixedly connected with a pressing block (13).

4. The acetabular fossa positioning tool for hip joint surgery according to claim 3, characterized in that, The bottom of the pressing block (13) is fixedly connected to a pressure strip (14), which is made of rubber.

5. The acetabular fossa positioning tool for hip joint surgery according to claim 1, characterized in that, The fixed shell (8) is rotatably connected to a fixed plate (15). An extension block (16) is fixedly connected to one side of the fixed plate (15). A connecting frame (17) is rotatably connected to the front and rear sides of the extension block (16). A positioning plate (18) is fixedly connected to one side of the connecting frame (17).

6. The acetabular fossa positioning tool for hip joint surgery according to claim 5, characterized in that, The front and rear sides of the extension block (16) are fixedly connected to the limiting plate (19), and the side of the connecting frame (17) is fixedly connected to the fixing plate (20). The limiting plate (19) and the fixing plate (20) are both provided with positioning holes (21) for positioning the connecting frame (17).

7. The acetabular fossa positioning tool for hip joint surgery according to claim 5, characterized in that, The top of the positioning plate (18) is provided with a second toggle block (22), and the bottom of the second toggle block (22) extends through to the bottom of the positioning plate (18) and is fixedly connected with a threaded nail (23).

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