Lateral position fixing device for guiding directional installation of acetabular cup

Abstract

The utility model discloses a lateral position fixing device for guiding directional installation of an acetabular cup, which comprises a back supporting bracket and a front supporting bracket, the back supporting bracket is used for supporting the back of a patient, the back supporting bracket is used for supporting the pelvis of the patient, clamping components are fixedly arranged on the front supporting bracket and the back supporting bracket, and the front supporting bracket is used for supporting the pelvis of the patient. The clamping assembly is used for being fixed to an operating bed, the front supporting support comprises a T-shaped support, supporting units are movably arranged at the three ends of the T-shaped support, the T-shaped support comprises a transverse pipe fitting and a vertical pipe fitting, the transverse pipe fitting is fixed to the middle of the outer wall of one side of the vertical pipe fitting, and the transverse pipe fitting and the vertical pipe fitting are perpendicularly arranged. The three supporting units on the front supporting support are matched, the front portion of the pelvis is fixed through three points, the anterior superior iliac spine and the pubis on the two sides are combined, fixing is firmer, the pelvis is better positioned, displacement of the pelvis in the operation process is reduced, and the anterior angle and the abduction angle of the acetabular cup can be guided in the operation.

Description

Technical Field

[0001] This utility model relates to the field of surgical aids technology, and in particular to a lateral fixation device for guiding the directional installation of the acetabular cup. Background Technology

[0002] Hip replacement, also known as artificial hip replacement, involves placing an artificial prosthesis, comprising the femoral and acetabular portions, onto healthy bone using bone cement and screws to replace the diseased joint and restore normal hip function. It is a relatively mature and reliable treatment method. However, in total hip arthroplasty (THA), excessively large or small abduction or anteversion angles of the acetabular cup placement can lead to postoperative problems such as prosthesis dislocation and premature wear. To avoid excessive errors, computer navigation systems and robotic techniques are primarily used during THA to assess the cup placement angle. However, due to the complexity and cost of these procedures, surgeons often rely on visual assessment, which can easily result in significant errors. Furthermore, when performing hip replacement via the posterolateral approach, the patient must lie on their side. Currently used lateral decubitus supports cannot securely fix the pelvis, leading to pelvic tilt during surgery and affecting the determination of the acetabular cup implantation direction. Therefore, we propose a lateral decubitus fixation device to guide the directional installation of the acetabular cup. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a lateral fixation device for guiding the acetabular cup during directional installation.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A lateral decubitus fixation device for guiding the directional installation of an acetabular cup includes: a back support bracket for supporting the patient's back; and a front support bracket for supporting the patient's pelvis. Clamping components are fixedly mounted on both the front and back support brackets for fixing them to an operating table. The front support bracket includes a T-shaped bracket with support units movably mounted at each of its three ends. The T-shaped bracket includes a horizontal tube and a vertical tube, with the horizontal tube fixed to the outer wall of one side of the vertical tube. In the middle position, with the horizontal tube and the vertical tube arranged perpendicularly, an auxiliary light assembly is provided at the middle position of the side of the vertical tube away from the horizontal tube. The auxiliary light assembly includes an adjustable linkage rod group. A third universal ball joint is fixedly provided on the upper part of the linkage rod group. A mounting base is fixedly provided at the end of the third universal ball joint away from the linkage rod group. A light body is fixedly provided on the mounting base. A second universal ball joint is fixedly provided on the horizontal tube. A support arm is fixedly provided at the end of the second universal ball joint away from the horizontal tube. The support arm is connected to the clamping assembly.

[0006] Preferably, the support unit includes a movable rod, one side wall of which is provided with a scale line, a connecting rod is fixedly provided at one end of the movable rod, a rectangular support block is fixedly provided at the end of the connecting rod away from the movable rod, a channel for inserting the movable rod is provided in the vertical tube and the horizontal tube, and a second adjusting bolt for locking the movable rod is threadedly connected to the side wall of the vertical tube and the horizontal tube.

[0007] Preferably, the clamping assembly includes a C-shaped card holder and a supporting vertical rod. The C-shaped card holder has a through-hole that is adapted to the supporting vertical rod. A through-hole threaded on one vertical surface of the C-shaped card holder is provided, and a fourth adjusting bolt is threaded into the threaded hole. A rotating seat is fixedly provided at the top of the supporting vertical rod, and a rotating sleeve is rotatably provided at the top of the rotating seat. Anti-slip patterns are radially distributed at equal intervals on the surfaces where the rotating sleeve and the rotating seat meet, and the anti-slip patterns on the rotating sleeve and the rotating seat interlock with each other. A fifth adjusting bolt is provided between the rotating seat and the rotating sleeve to limit the rotation of the rotating sleeve.

[0008] Preferably, the support arm is fixedly connected to the rotating sleeve in the clamping assembly.

[0009] Preferably, the linkage assembly includes a first linkage rod and a second linkage rod. One end of the first linkage rod is respectively provided with a first rotating seat and a second rotating seat. The first rotating seat and the second rotating seat are rotatably connected, and a third adjusting bolt for limiting their mutual rotation is provided between the first rotating seat and the second rotating seat. The end of the second linkage rod away from the second rotating seat is fixedly connected to a third universal ball joint.

[0010] Preferably, a connecting sleeve is provided at the middle position on the side of the vertical pipe away from the horizontal pipe, and an internal thread is provided on the inner side of the connecting sleeve. The first linkage rod is provided with an external thread that matches the internal thread of the connecting sleeve at the end away from the first rotating seat, and the connecting sleeve and the first linkage rod form a threaded connection.

[0011] Preferably, the back support bracket includes a metal curved rod, one end of which is provided with a horizontally arranged mounting sleeve. A first universal ball joint is fixedly provided on the mounting sleeve. A back support pad is fixed to the end of the first universal ball joint away from the mounting sleeve. The end of the metal curved rod away from the mounting sleeve is fixed to a support vertical rod.

[0012] Preferably, the lamp body is a visible laser.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The front support frame, with its three support units, provides three-point fixation of the anterior iliac spines and pubic symphysis on both sides, resulting in more secure fixation, better pelvic positioning, and reduced pelvic displacement during surgery.

[0015] 2. The set-in visible light, in conjunction with the linkage assembly, can guide the placement of the acetabular cup at the anteversion and abduction angles during surgery, improving the success rate of the operation.

[0016] 3. This device can determine whether the pelvis has shifted during the operation by observing changes in the visual laser, even when the pelvis is not visible during the operation. Even if the pelvis shifts during the operation, the anterior support, linkage rod assembly and light source can move accordingly, still guiding the direction of the acetabular cup placement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the lateral fixation device for guiding the directional installation of the acetabular cup proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the back support bracket proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the auxiliary lamp assembly proposed in this utility model;

[0020] Figure 4 This is a schematic diagram of the clamping assembly proposed in this utility model;

[0021] Figure 5 This is a schematic diagram of the front support bracket proposed in this utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the support unit proposed in this utility model;

[0023] Figure 7 This is a schematic diagram of the T-shaped bracket proposed in this utility model.

[0024] In the diagram: 1. Back support bracket; 101. Metal curved rod; 102. Mounting sleeve; 103. First universal ball joint; 104. Back support pad; 2. Front support bracket; 201. T-shaped bracket; 2011. Horizontal tube fitting; 2012. Vertical tube fitting; 2013. Connecting sleeve; 202. Support arm; 203. Support unit; 2031. Movable rod; 2032. Connecting rod; 2033. Rectangular support block; 204. Second universal ball joint; 205. Second adjusting bolt; 3. Auxiliary lamp assembly; 301. First linkage rod; 3011. First rotating seat; 302. Second linkage rod; 3021. Second rotating seat; 303. Third adjusting bolt; 304. Third universal ball joint; 305. Mounting seat; 306. Lamp body; 4. Clamping assembly; 401. Supporting vertical rod; 402. C-type card holder; 4021. Insertion hole; 403. Fourth adjusting bolt; 404. Rotating seat; 405. Rotating sleeve; 406. Fifth adjusting bolt. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Reference Figures 1-7 A lateral decubitus fixation device for guiding the directional installation of the acetabular cup, comprising:

[0027] Back support bracket 1, the back support bracket 1 is used to support the patient's back;

[0028] The front support bracket 2 and the back support bracket 1 are used to support the patient's pelvis. Both the front support bracket 2 and the back support bracket 1 are fixedly equipped with clamping components 4, which are used to fix them to the operating table.

[0029] The front support bracket 2 includes a T-shaped bracket 201, with support units 203 movably mounted at each of its three ends. The T-shaped bracket 201 includes a horizontal tube 2011 and a vertical tube 2012. The horizontal tube 2011 is fixed to the middle position of one side of the outer wall of the vertical tube 2012, and is perpendicular to the vertical tube 2012. An auxiliary light assembly 3 is mounted at the middle position of the side of the vertical tube 2012 away from the horizontal tube 2011. Component 3 includes an adjustable linkage assembly. A third universal ball joint 304 is fixedly mounted on the upper part of the linkage assembly. A mounting base 305 is fixedly mounted on the end of the third universal ball joint 304 away from the linkage assembly. A lamp body 306 is fixedly mounted on the mounting base 305. A second universal ball joint 204 is fixedly mounted on the horizontal tube 2011. A support arm 202 is fixedly mounted on the end of the second universal ball joint 204 away from the horizontal tube 2011. The support arm 202 is connected to the clamping assembly 4.

[0030] The support unit 203 includes a movable rod 2031, with a scale line on one side wall of the movable rod 2031. A connecting rod 2032 is fixedly mounted on one end of the movable rod 2031, and a rectangular support block 2033 is fixedly mounted on the end of the connecting rod 2032 away from the movable rod 2031. The vertical tube 2012 and the horizontal tube 2011 have channels for inserting the movable rod 2031. The side walls of the vertical tube 2012 and the horizontal tube 2011 are threadedly connected to a second adjusting bolt 205 for locking the movable rod 2031. The clamping assembly 4 includes a C-shaped card holder 402 and a supporting vertical rod 401. An insertion hole 4021 is provided through the C-shaped card holder 402. The insertion hole 4021 is adapted to the support vertical rod 401. A through screw hole is provided on one vertical surface of the C-shaped card holder 402, and a fourth adjusting bolt 403 is threaded into the screw hole. A rotating seat 404 is fixedly provided on the top of the support vertical rod 401. A rotating sleeve 405 is rotatably mounted on the top of the rotating seat 404. Radially distributed anti-slip patterns are provided on the surfaces where the rotating sleeve 405 and the rotating seat 404 meet, and these patterns interlock. A fifth adjusting bolt 406 is provided between the rotating seat 404 and the rotating sleeve 405 to limit the rotation of the rotating sleeve 405. The support arm 202 and the clamp... The rotating sleeve 405 in the holding assembly 4 is fixedly connected. The linkage group includes a first linkage rod 301 and a second linkage rod 302. One end of the first linkage rod 301 is respectively provided with a first rotating seat 3011 and a second rotating seat 3021. The first rotating seat 3011 and the second rotating seat 3021 are rotatably connected, and a third adjusting bolt 303 is provided between the first rotating seat 3011 and the second rotating seat 3021 to limit their mutual rotation. The end of the second linkage rod 302 away from the second rotating seat 3021 is fixedly connected to a third universal ball joint 304. A connecting sleeve 2013 is provided at the middle position on the side of the vertical tube 2012 away from the horizontal tube 2011. The connecting sleeve 2013 has an internal thread on its inner side. The first linkage rod 301 has an external thread at the end away from the first rotating seat 3011 that matches the internal thread of the connecting sleeve 2013. The connecting sleeve 2013 and the first linkage rod 301 form a threaded connection. The back support bracket 1 includes a metal curved rod 101. One end of the metal curved rod 101 is provided with a horizontally arranged mounting sleeve 102. A first universal ball joint 103 is fixedly provided on the mounting sleeve 102. A back support pad 104 is fixed at the end of the first universal ball joint 103 away from the mounting sleeve 102. The end of the metal curved rod 101 away from the mounting sleeve 102 is fixed to the support vertical rod 401. The lamp body 306 is a visible laser.

[0031] Working principle: The front support bracket 2 and the back support bracket 1 are fixed to both sides of the operating table by the clamping components 4 on the front support bracket 2 and the back support bracket 1. The clamping components 4 are fixed by clamping the C-shaped bracket 402 onto the edge strip of the operating table, and then inserting the support vertical rod 401 into the insertion hole 4021, so that the support vertical rod 401 extends to a suitable length. Then, the fourth adjusting bolt 403 is rotated to lock it. In the process of tightening the fourth adjusting bolt 403, the clamping components 4 are fixed to the edge strip of the operating table, and the support vertical rod 401 is also fixed. In the actual operation, the patient lies on his / her side between the front support bracket 2 and the back support bracket 1, and the position of the back support pad 104 on the back support bracket 1 is adjusted. Support the patient's lower back, adjust the support unit 203 in the front support bracket 2 to extend to a suitable length, and adjust the second universal ball joint 204 so that the rectangular support block 2033 adapts to the patient's body shape to support the patient's pelvis. After proper adjustment, lock it by the support unit 203 and the fifth adjusting bolt 406. Adjust the angle of the second linkage rod 302 and the first linkage rod 301, and adjust the third universal ball joint 304 to adjust the light angle of the lamp body 306. The specific purpose of the lamp body 306 is to adjust the light illumination angle. Then, during the operation, the acetabular cup is placed in the surgical position along the direction of the light to achieve the appropriate anteversion angle and abduction angle of the acetabular cup.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A lateral decubitus fixation device for guiding the orientation of installation of a acetabular cup, characterized in that, Include: Back support bracket (1), the back support bracket (1) is used to support the back of the patient, the front support bracket (2) is used to support the pelvis of the patient, the front support bracket (2) and the back support bracket (1) are fixedly provided with clamping assembly (4), the clamping assembly (4) is used to be fixed with operating bed, the front support bracket (2) includes T-shaped bracket (201), the three ends of the T-shaped bracket (201) are movably provided with support unit (203), the T-shaped bracket (201) includes horizontal pipe (2011) and vertical pipe (2012), the horizontal pipe (2011) is fixed to the middle position of the outer wall of the vertical pipe (2012) one side, and the horizontal pipe (2011) and the vertical pipe (2012) are perpendicular, the vertical pipe (2012) is provided with auxiliary lamp assembly (3) at the middle position of the side away from the horizontal pipe (2011), the auxiliary lamp assembly (3) includes linkage rod group that can adjust angle, the third universal ball head (304) is fixedly arranged on the upper portion of the linkage rod group, the third universal ball head (304) is fixed with mounting seat (305) on the end away from the linkage rod group, the mounting seat (305) is fixedly provided with lamp body (306), the horizontal pipe (2011) is fixedly provided with second universal ball head (204), the second universal ball head (204) is fixed with support arm (202) on the end away from the horizontal pipe (2011), the support arm (202) is connected with clamping assembly (4).

2. A lateral decubitus position fixation device for guiding the orientation of installation of a hip cup according to claim 1, characterized in that The support unit (203) includes a movable rod (2031), one of the side walls of the movable rod (2031) is provided with a scale line, one end of the movable rod (2031) is fixedly provided with a connecting rod (2032), the connecting rod (2032) is fixedly provided with a rectangular support block (2033) on the end away from the movable rod (2031), the vertical pipe (2012) and the horizontal pipe (2011) are provided with a channel for inserting the movable rod (2031), the side wall of the vertical pipe (2012) and the horizontal pipe (2011) is screw connected with the second adjusting bolt (205) for locking the movable rod (2031).

3. A lateral decubitus position fixation device for guiding the orientation of installation of a hip cup according to claim 2, characterized in that The clamping assembly (4) includes a C-shaped card holder (402) and a support vertical rod (401). The C-shaped card holder (402) has a through hole (4021) that is adapted to the support vertical rod (401). A through screw hole is provided on one vertical surface of the C-shaped card holder (402), and a fourth adjusting bolt (403) is threaded into the screw hole. A rotating seat (404) is fixedly provided on the top of the support vertical rod (401). A rotating sleeve (405) is rotatably provided on the top of the rotating seat (404). Anti-slip patterns are provided radially and equidistantly distributed on the surfaces where the rotating sleeve (405) and the rotating seat (404) meet. The anti-slip patterns on the rotating sleeve (405) and the rotating seat (404) interlock with each other. A fifth adjusting bolt (406) is provided between the rotating seat (404) and the rotating sleeve (405) to limit the rotation of the rotating sleeve (405).

4. A lateral decubitus position fixation device for guiding the orientation of installation of a hip cup according to claim 3, characterized in that The support arm (202) is fixedly connected to the rotating sleeve (405) in the clamping assembly (4).

5. A lateral decubitus position fixation device for guiding the orientation of installation of a hip cup according to claim 4, characterized in that The linkage assembly includes a first linkage (301) and a second linkage (302). One end of the first linkage (301) is provided with a first rotating seat (3011) and a second rotating seat (3021). The first rotating seat (3011) and the second rotating seat (3021) are rotatably connected. A third adjusting bolt (303) is provided between the first rotating seat (3011) and the second rotating seat (3021) to limit their mutual rotation. The end of the second linkage (302) away from the second rotating seat (3021) is fixedly connected to a third universal ball joint (304).

6. A lateral decubitus position fixation device for guiding the orientation of installation of a hip cup according to claim 5, characterized in that A connecting sleeve (2013) is provided at the middle position on the side of the vertical pipe (2012) away from the horizontal pipe (2011). The connecting sleeve (2013) has an internal thread on its inner side. The first linkage rod (301) has an external thread at the end away from the first rotating seat (3011) that matches the internal thread of the connecting sleeve (2013). The connecting sleeve (2013) and the first linkage rod (301) form a threaded connection.

7. A lateral decubitus position fixation device for guiding the orientation of the installation of a hip cup according to claim 6, characterized in that The back support bracket (1) includes a metal crank (101), one end of which is provided with a horizontally arranged mounting sleeve (102). A first universal ball joint (103) is fixedly arranged on the mounting sleeve (102). A back support pad (104) is fixed at the end of the first universal ball joint (103) away from the mounting sleeve (102). The end of the metal crank (101) away from the mounting sleeve (102) is fixed to the support vertical rod (401).

8. A lateral decubitus position fixation device for guiding the orientation of the installation of a hip cup according to claim 7, characterized in that The lamp body (306) is a visible laser.

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