Complete set of positioning device for artificial total hip replacement

Abstract

The utility model relates to the field of positioning devices, in particular to a complete positioning device for artificial total hip replacement, which is characterized in that a leg support bracket is mounted at the upper part of a bottom plate through a rotating seat, a cover plate is mounted at the upper part of the leg support bracket in a covering manner, and a pair of double-end opposite lead screws is mounted in the middle of the cover plate; threaded sections with opposite rotating directions are arranged at the two ends of the double-end opposite lead screw respectively, sliding blocks are connected to the threaded sections at the two ends in a threaded mode respectively, positioning rods are installed at the bottoms of the sliding blocks, and when the double-end opposite lead screw rotates, the sliding blocks at the two ends are driven by spiral rotation to achieve opposite displacement. According to the utility model, the leg supporting bracket supports and positions the thighs of a patient, the leg supporting bracket realizes a rotary locking function through the components such as the rotary seat and the fastening bolt, the cover plate is matched with the solid rod to press the legs so as to finish a vertical positioning function, and meanwhile, the double-end opposite screw rod is rotated to drive the positioning rods to move in opposite directions, so that the leg supporting bracket can be used for supporting the thighs of the patient. Therefore, the legs are clamped and locked, the left-right positioning function is achieved, and the stable positioning effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of positioning device technology, and in particular to a complete positioning device for total hip replacement. Background Technology

[0002] Total hip replacement is a common and effective treatment for hip joint diseases. It restores joint function, relieves pain, and improves quality of life by replacing the damaged hip bone with an artificial joint.

[0003] During actual surgery, the patient's leg may move involuntarily due to factors such as the effect of anesthesia and the degree of muscle relaxation, or the position of the leg may change due to touching or pulling during the operation. Current technology uses straps and braces for temporary fixation, but there is no complete set of positioning devices for fixing and positioning the patient's leg, which makes it impossible to guarantee the accuracy of the operation. Therefore, there is an urgent need for a complete set of positioning devices for total hip replacement. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a complete positioning device for total hip replacement.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A complete positioning device for total hip replacement includes a base plate. A leg support bracket is mounted on the upper part of the base plate via a rotating seat. A cover plate is installed on the upper part of the leg support bracket. A pair of double-ended opposing screws are installed in the middle of the cover plate. The two ends of the double-ended opposing screws are respectively provided with threaded sections with opposite directions of rotation. A slider is screwed onto the threaded sections at both ends. A positioning rod is installed at the bottom of the slider. When the double-ended opposing screws rotate, the sliders at both ends are driven by the helical rotation to achieve opposite displacement.

[0007] The leg support bracket has docking seats installed on both outer sides. The upper two sides of the docking seats have vertical docking grooves. Limiting rods are inserted into the docking grooves and installed at the bottom of the cover plate.

[0008] In addition, a preferred structure is that the bottom of the base plate is provided with insert posts at the four corners, and the base plate is installed onto the perforated mounting base plate by inserting the insert posts.

[0009] In addition, a preferred structure is that a pressure block is installed at the top of the inner wall of the leg support bracket.

[0010] In addition, a preferred structure is that a bearing is installed on the upper part of the rotating seat, the bearing is connected to the bottom wall of the leg support bracket, a certain gap is left between the bottom wall of the leg support bracket and the outer wall of the rotating seat, and a fastening bolt is screwed to one side of the bottom of the leg support bracket, with one end of the fastening bolt in extrusion and friction contact with the outer wall of the rotating seat.

[0011] In addition, a preferred structure is that the upper part of the cover plate has multiple limiting grooves, and a slider is installed in the limiting groove. The slider is screwed to a double-ended opposing screw. One end of the double-ended opposing screw is rotatably installed on the inner wall of the limiting groove, and the other end extends out of the outer side of the cover plate and is equipped with a rocker arm.

[0012] In addition, a preferred structure is that the docking seat has a horizontal docking hole in the middle, which passes through each docking groove. When the docking hole and the insertion hole are coaxially aligned, the solid rod is passed through the docking hole and the insertion hole to realize the docking operation between the limiting rod and the docking seat.

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

[0014] In this invention, the leg support bracket supports and positions the patient's thigh. The leg support bracket achieves a rotational locking function through components such as a rotating seat and fastening bolts. The cover plate, together with a solid rod, presses the leg to complete the vertical positioning function. At the same time, by rotating the double-headed opposing lead screw, multiple positioning rods move in opposite directions to clamp and lock the leg, achieving the horizontal positioning function. This results in a stable positioning effect and ensures work efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external structure of a complete positioning device for total hip replacement proposed in this utility model.

[0016] Figure 2 This is a front view of the leg support bracket proposed in this utility model;

[0017] Figure 3 This is a schematic diagram of the rotating seat connection structure proposed in this utility model;

[0018] Figure 4 This is a schematic diagram of the structure at point A proposed in this utility model;

[0019] Figure 5 This is a schematic diagram of the docking seat connection structure proposed in this utility model.

[0020] In the diagram: 1. Base plate; 2. Mounting base with opening; 3. Rotary seat; 31. Fastening bolt; 4. Leg support bracket; 5. Solid rod; 6. Cover plate; 7. Double-ended opposing lead screw; 8. Limiting groove; 9. Sliding block; 91. Positioning rod; 10. Limiting rod; 101. Insertion hole; 11. Insertion post; 12. Connecting seat; 121. Connecting hole; 122. Connecting groove; 13. Pressure block; 14. Bearing component. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figure 1-5 A complete positioning device for total hip replacement includes a base plate 1. A leg support bracket 4 is mounted on the upper part of the base plate 1 via a rotating seat 3. A cover plate 6 is installed on the upper part of the leg support bracket 4. A pair of double-ended opposing screw rods 7 are installed in the middle of the cover plate 6. The two ends of the double-ended opposing screw rods 7 are respectively provided with threaded sections with opposite directions of rotation. A slider 9 is screwed onto the threaded sections at both ends. A positioning rod 91 is installed at the bottom of the slider 9. When the double-ended opposing screw rods 7 rotate, the sliders 9 at both ends are driven by the helical rotation to achieve opposite displacement.

[0023] Both sides of the leg support bracket 4 are equipped with docking seats 12. The upper two sides of the docking seats 12 are vertically provided with docking grooves 122. Limiting rods 10 are inserted into the docking grooves 122 and are installed at the bottom of the cover plate 6.

[0024] The base plate 1 has four corner posts 11 at its bottom. The base plate 1 is installed onto the perforated mounting base plate 2 by inserting the posts 11. The perforated mounting base plate 2 and the base plate 1 are a matching component. The perforated mounting base plate 2 is used to install onto the operating table. The specific installation method is existing technology and will not be explained further.

[0025] A pressure block 13 is installed at the top of the inner wall of the leg support bracket 4. The pressure block 13 is used to press the thigh tightly.

[0026] A bearing 14 is installed on the upper part of the rotating seat 3. The bearing 14 is connected to the bottom wall of the leg support bracket 4. There is a certain gap between the bottom wall of the leg support bracket 4 and the outer wall of the rotating seat 3. A fastening bolt 31 is screwed to one side of the bottom of the leg support bracket 4. One end of the fastening bolt 31 is in contact with the outer wall of the rotating seat 3 by compression and friction.

[0027] The upper part of the cover plate 6 has multiple limiting grooves 8. A slider 9 is installed in the limiting groove 8. The slider 9 is screwed to the double-ended opposing screw 7. One end of the double-ended opposing screw 7 is rotatably installed on the inner wall of the limiting groove 8, and the other end extends out of the outer side of the cover plate 6 and is equipped with a rocker arm.

[0028] A docking hole 121 is horizontally opened in the middle of the docking seat 12. The docking hole 121 passes through each docking groove 122. When the docking hole 121 and the insertion hole 101 are coaxially coincident, the solid rod 5 is passed through the docking hole 121 and the insertion hole 101 to realize the docking operation between the limiting rod 10 and the docking seat 12.

[0029] In this embodiment, the operating table is equipped with an open mounting base 2. The base plate 1 is installed near the patient's knee by inserting the column 11. At this time, according to the patient's actual surgical position, the leg support bracket 4 is rotated to a suitable angle, and the fastening bolt 31 is tightened to make it rub and squeeze into contact with the outer wall of the rotating base 3, thus completing the angle locking operation of the leg support bracket 4.

[0030] Then, the limiting rod 10 at the bottom of the cover plate 6 is inserted into the docking groove 122 in the middle of the docking seat 12, and the cover plate 6 is pressed down gradually so that the pressure block 13 makes contact with the patient's thigh. At this time, by slightly pressing down the cover plate 6, the corresponding insertion hole 101 on the limiting rod 10 is aligned with the docking hole 121 on the docking seat 12. Then, the solid rod 5 is inserted laterally into the insertion hole 101 and the docking hole 121 to complete the connection and locking function of the limiting rod 10 and the docking rod 12, thereby positioning the upper and lower parts of the patient's thigh.

[0031] Then, multiple double-headed opposing lead screws 7 are installed on the rotating cover plate 6, and the two ends of the screws are driven by the opposite threads to move a pair of sliders 9 towards each other, so that the positioning rod 91 clamps the two sides of the patient's thigh, thereby positioning the left and right parts of the patient's thigh.

[0032] Among them, the bearing component 14 enables the rotation function of the leg support bracket 4.

[0033] 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 complete positioning device for total hip arthroplasty, comprising a base plate (1), characterized in that, The upper part of the base plate (1) is equipped with a leg support bracket (4) via a rotating seat (3). The upper part of the leg support bracket (4) is covered with a cover plate (6). A pair of double-headed opposing screws (7) are installed in the middle of the cover plate (6). The two ends of the double-headed opposing screws (7) are respectively provided with threaded sections with opposite directions of rotation. Slider blocks (9) are screwed onto the threaded sections at both ends. A positioning rod (91) is installed at the bottom of the slider (9). When the double-headed opposing screws (7) rotate, the sliders (9) at both ends are driven by the helical rotation to achieve opposite displacement. The leg support bracket (4) is equipped with docking seats (12) on both sides of its exterior. The upper two sides of the docking seats (12) are vertically provided with docking grooves (122). Limiting rods (10) are inserted into the docking grooves (122) and are installed at the bottom of the cover plate (6).

2. The complete positioning device for total hip arthroplasty according to claim 1, characterized in that, The bottom of the base plate (1) is provided with four corner posts (11), and the base plate (1) is installed on the perforated mounting base plate (2) by inserting the posts (11).

3. The complete positioning device for total hip arthroplasty according to claim 1, characterized in that, A pressure block (13) is installed at the top of the inner wall of the leg support bracket (4).

4. The complete positioning device for total hip arthroplasty according to claim 1, characterized in that, The upper part of the rotating seat (3) is equipped with a bearing component (14), which is connected to the bottom wall of the leg support bracket (4). The bottom wall of the leg support bracket (4) and the outer wall of the rotating seat (3) have a certain gap. A fastening bolt (31) is screwed to one side of the bottom of the leg support bracket (4), and one end of the fastening bolt (31) is in contact with the outer wall of the rotating seat (3) by compression and friction.

5. The complete positioning device for total hip arthroplasty according to claim 1, characterized in that, The upper part of the cover plate (6) has multiple limiting grooves (8), and a slider (9) is installed in the limiting groove (8). The slider (9) is screwed to a double-ended opposing screw (7). One end of the double-ended opposing screw (7) is rotatably installed on the inner wall of the limiting groove (8), and the other end extends out of the outer side of the cover plate (6) and is equipped with a rocker arm.

6. The complete positioning device for total hip arthroplasty according to claim 1, characterized in that, The docking seat (12) has a horizontal docking hole (121) in the middle. The docking hole (121) passes through each docking groove (122). When the docking hole (121) and the insertion hole (101) are coaxially aligned, the solid rod (5) is passed through the docking hole (121) and the insertion hole (101) to realize the docking operation between the limiting rod (10) and the docking seat (12).

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