Femoral side prosthesis implantation position controller for total hip replacement

Abstract

The invention provides a thighbone side prosthesis implantation position controller for total hip replacement, and belongs to the technical field of medical instruments. A measurer; the threaded hole is formed in the upper end of the measurer; the threaded insertion rod is in threaded connection with the interior of the threaded hole; the sliding plate is arranged on one side of the measurer; the adjusting bolt is fixedly connected to one side end of the measurer; a hip joint replacement femoral side prosthesis implantation position controller is composed of a simple controller body which can be fixed to the neck of a femoral stem prosthesis, an adjusting column is additionally installed on one side of the controller body, scales ranging from-5 mm to + 15 mm are arranged on the surface of a baffle, a 1.6 mm small hole of a sliding groove vertically moves, and a kirschner wire can pass through the controller body to determine the approximate position of the prosthesis; the instrument is simple to operate, can reduce the conditions of long and short legs and related complications after an operation, and improves the satisfaction degree of a patient.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a femoral prosthesis placement position controller for total hip replacement. Background Art

[0002] Total hip replacement is a common orthopedic surgery used to treat severe hip disease or injury. In this procedure, the damaged part of the hip joint is replaced with a prosthesis made of artificial materials. The femoral prosthesis is usually a component used to replace the femoral head and part of the femoral neck. It consists of a metal or ceramic ball head and a rod-like structure that is inserted into the femoral medullary cavity.

[0003] At present, hip replacement surgery mainly relies on visual inspection or the use of tools such as rulers to control the length of the lower limbs. At the same time, the position of the femoral prosthesis is also an important factor affecting the length of the lower limbs. At this stage, the prosthesis placement is mainly determined by visual inspection, and there are no precise control tools. In conventional hip replacement surgery, the prosthesis placement position is confirmed by visual inspection and rulers. Although it is possible, it is easy to cause unequal length of the lower limbs in the face of insufficient surgical experience or in some special circumstances, which is accompanied by the occurrence of some complications. Summary of the invention

[0004] The purpose of the present invention is to provide a controller for the placement position of the femoral prosthesis in total hip replacement, aiming to solve the problem in the prior art that in current hip replacement surgery, the length of the lower limbs is mainly controlled by visual inspection or using tools such as a ruler; at the same time, the placement position of the femoral prosthesis is also an important factor affecting the length of the lower limbs. At present, the placement position of the prosthesis is mainly determined by visual inspection, and there is no accurate control tool. In conventional hip replacement surgery, the placement position of the prosthesis is confirmed by visual inspection and a ruler. Although this is possible, it is easy to cause unequal length of the lower limbs in the face of insufficient surgical experience or in some special circumstances, thereby causing some complications.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A femoral prosthesis placement position controller for total hip replacement, comprising:

[0007] Measuring device;

[0008] A threaded hole, wherein the threaded hole is opened at the upper end of the measuring device;

[0009] A threaded rod, wherein the threaded rod is threadedly connected in the threaded hole;

[0010] A sliding plate, the sliding plate being arranged on one side of the measuring device;

[0011] An adjusting bolt, wherein the adjusting bolt is fixedly connected to one side end of the measuring device;

[0012] A femoral prosthesis, wherein the femoral prosthesis is located in the measuring device;

[0013] The adjustment mechanism includes a handle, a slide groove, a hollow groove, a spring, a fixed block and a gear block, wherein five gear blocks are provided, the hollow groove is opened at the other side end of the measuring device, the handle passes through the measuring device and is located in the hollow groove, the fixed block is fixedly connected to one side end of the handle, the five gear blocks are all fixedly connected to one side end of the fixed block, the spring is fixedly connected to the inner wall of one side of the hollow groove, and the spring is sleeved on the circumferential surface of the handle.

[0014] As a preferred solution of the present invention, a slide groove is provided on the other side end of the measuring device, an adjustment column is provided on one side of the measuring device, and both side ends of the adjustment column are fixedly connected with a protrusion and a slider.

[0015] As a preferred solution of the present invention, a baffle is fixedly connected to one side end of the measuring device.

[0016] As a preferred solution of the present invention, the surface of the baffle is provided with a scale of -5mm to +15mm.

[0017] As a preferred solution of the present invention, the width of the slide groove is 1.6 mm.

[0018] As a preferred solution of the present invention, the adjusting bolt can adjust the position of the sliding plate relative to the measuring device, so as to accurately control the insertion depth of the femoral prosthesis in the patient's bone.

[0019] As a preferred solution of the present invention, the femoral prosthesis can be moved along the inside of the measuring device so as to accurately adjust its position relative to the patient's bones.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The controller for the placement of the femoral prosthesis in hip replacement consists of a simple controller body that can be fixed on the neck of the femoral stem prosthesis. A cylindrical column is installed on one side of the body, with a scale of -5mm to +15mm on its surface and a 1.6mm small hole that can move vertically to allow the Kirschner wire to pass through to determine the approximate position of the prosthesis. The device is easy to operate, can reduce the length of the legs and related complications after surgery, and improve patient satisfaction.

[0022] 2. Control the insertion depth of the prosthesis in hip replacement, thereby reducing the occurrence of lower limb length inequality; to a certain extent, it can effectively avoid revision surgery caused by lower limb length inequality after surgery and improve patient satisfaction.

[0023] 3. In terms of patient rehabilitation, the patient's postoperative recovery process is usually smoother due to the ability to achieve more precise prosthesis placement. Accurately placed femoral prostheses can better simulate the function of natural joints, reduce pain and improve mobility. In addition, precise position control reduces unnecessary soft tissue damage, reduces the risk of infection, and helps accelerate the healing process. Therefore, the use of this controller not only improves the quality of surgery, but also greatly improves the patient's quality of life, shortens hospital stays and recovery cycles, and enables patients to return to normal life faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 It is the first explosion diagram in the present invention;

[0027] Figure 3 For the present invention Figure 2 A partial enlarged view of the middle A;

[0028] Figure 4 is a second exploded view of the present invention;

[0029] Figure 5 For the present invention Figure 4 A partial enlarged view of point B in the middle;

[0030] Figure 6 It is an enlarged view of the adjustment column in the present invention.

[0031] In the figure: 1. threaded rod; 2. measuring device; 3. femoral prosthesis; 4. threaded hole; 5. sliding plate; 6. adjusting bolt; 7. handle; 8. adjusting column; 9. slide groove; 10. hollow groove; 11. spring; 12. fixing block; 13. gear block; 14. protrusion; 15. slider; 16. baffle. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1

[0034] See also Figure 1-Figure 6 , the present invention provides the following technical solutions:

[0035] A femoral prosthesis placement position controller for total hip replacement, comprising:

[0036] Measuring device 2;

[0037] A threaded hole 4, which is provided at the upper end of the measuring device 2;

[0038] A threaded rod 1, the threaded rod 1 is threadedly connected in the threaded hole 4;

[0039] A sliding plate 5, the sliding plate 5 is arranged on one side of the measuring device 2;

[0040] An adjusting bolt 6, the adjusting bolt 6 is fixedly connected to one side end of the measuring device 2;

[0041] A femoral prosthesis 3, the femoral prosthesis 3 is located in the measuring device 2;

[0042] The adjustment mechanism includes a handle 7, a slide groove 9, a hollow groove 10, a spring 11, a fixed block 12 and a gear block 13, wherein the gear block 13 is provided with five, the hollow groove 10 is opened at the other side end of the measuring device 2, the handle 7 passes through the measuring device 2 and is located in the hollow groove 10, the fixed block 12 is fixedly connected to one side end of the handle 7, the five gear blocks 13 are all fixedly connected to one side end of the fixed block 12, the spring 11 is fixedly connected to one side inner wall of the hollow groove 10, and the spring 11 is sleeved on the circumferential surface of the handle 7;

[0043] A slide groove 9 is provided at the other side end of the measuring device 2 , and an adjusting column 8 is provided at one side of the measuring device 2 . A protrusion 14 and a sliding block 15 are fixedly connected to both side ends of the adjusting column 8 .

[0044] In a specific embodiment of the present invention, the measuring device 2 is used as the basis of the entire device for installing other components. The threaded hole 4 matches the threaded rod 1 and can be used for fixing by rotation. One end of the threaded rod 1 has an external thread and can be screwed into the threaded hole 4 on the measuring device 2. The sliding plate 5 slides along the surface of the measuring device 2 to provide a moving track for the adjustment column 8, which is bound to the measuring device 2 through a latch, so that the movable effect can be achieved. The adjusting bolt 6 is used to lock the position of the sliding plate 5 to ensure that it remains stable after the adjustment is completed. The femoral prosthesis 3 is placed in the measuring device 2, it can be fixed by tightening the adjustment bolt 6. The handle 7 passes through the measuring device 2, and one end is located in the hollow groove 10. It is not only used to pull or push the entire adjustment mechanism, but also can change the position of the fixed block 12 and the gear block 13 by rotation. The handle 7 moves in a specific direction in the hollow groove 10, and a spring 11 is installed on one side inside it. The spring 11 is sleeved on the surface of the handle 7. When there is no external force, the spring 11 remains in a compressed state to ensure that the handle 7 is in the default position. When the handle 7 is pulled, the spring 11 stretches and the fixed block 12 moves accordingly with the movement of the handle 7. There are five gear blocks 13, which are evenly distributed and fixed on one side of the fixed block 12. Each gear block 13 represents a different preset position and can interact with the corresponding groove or structure on the sliding plate 5 to achieve accurate positioning of the femoral prosthesis 3. The slide groove 9 guides the movement path of the adjustment column 8. The adjustment column 8 is a key part connecting the measuring device 2 with other components. The movement directly affects the adjustment ability of the entire controller for the position of the femoral prosthesis. The protrusion 14 contacts the gear block 13 and is used to adjust the gear position. It is used as a stop to prevent the adjustment column 8 from escaping from the slide groove 9. The slider 15 ensures the stability and smoothness of the adjustment column 8 when it moves along the slide groove 9 to match the contour of the slide groove 9 to ensure a close fit without unnecessary shaking. The instrument is easy to operate, can reduce the situation of leg length difference and related complications after surgery, improve patient satisfaction, control the insertion depth of the prosthesis in hip replacement, thereby reducing the occurrence of lower limb length inequality, effectively avoid revision surgery caused by lower limb length inequality after surgery, and improve patient satisfaction.

[0045] For details, please refer to Figure 1-Figure 6 A baffle 16 is fixedly connected to one side end of the measuring device 2.

[0046] In this embodiment: the baffle 16 provides additional structural support and restriction to ensure that the adjustment column 8 and other components can operate in a predetermined manner. The baffle 16 can serve as a physical barrier to prevent the adjustment column 8 from escaping from one end of the slide groove 9. By increasing the rigidity and overall structural strength of the measuring device 2, the baffle 16 helps to maintain the stability of the entire device during use.

[0047] For details, please refer to Figure 1-Figure 6 The surface of the baffle 16 is provided with scales ranging from -5 mm to +15 mm.

[0048] In this embodiment: In addition to preventing the adjustment column 8 from excessive movement, the surface of the baffle 16 is marked with scales from -5mm to +15mm, and each gear is 5mm, respectively, for each gear block 13. When the protrusion 14 contacts the baffle 16 of the corresponding gear, the personnel can observe the current position of the adjustment column 8, and quickly and accurately read and adjust the position of the femoral prosthesis 3 during the operation.

[0049] For details, please refer to Figure 1-Figure 6 , the width of the slide groove 9 is 1.6 mm.

[0050] In this embodiment: the 1.6 mm small hole moves vertically to allow the Kirschner wire to pass through to determine the approximate position of the prosthesis.

[0051] For details, please refer to Figure 1-Figure 6 The adjusting bolt 6 can adjust the position of the sliding plate 5 relative to the measuring device 2, so as to accurately control the insertion depth of the femoral prosthesis 3 in the patient's bone.

[0052] In this embodiment: the adjusting bolt 6 pushes or pulls the sliding plate 5 by rotating, thereby changing the relative position between the sliding plate 5 and the measuring device 2, ensuring that the doctor can make adjustments with micron-level accuracy. The sliding plate 5 is a supporting platform for the adjusting column 8, and its position directly affects the position of the adjusting column 8 and its accompanying components, thereby affecting the insertion depth of the femoral prosthesis 3.

[0053] For details, please refer to Figure 1-Figure 6 The femoral prosthesis 3 can be moved along the inside of the measuring device 2 so as to accurately adjust its position relative to the patient's bone.

[0054] In this embodiment: the design of the femoral prosthesis 3 allows it to move along a specific path in the measuring device 2, which ensures that the doctor can make precise adjustments based on the patient's anatomical structure and surgical needs. The measuring device 2 not only integrates components such as the threaded hole 4, the sliding plate 5, and the adjustment mechanism, but also provides space for the femoral prosthesis 3 to move. The measuring device 2 may be provided with a guide rail or groove inside to guide the smooth movement of the femoral prosthesis 3 and keep it properly aligned.

[0055] The working principle and use process of the present invention are as follows: During the surgical preparation stage, first, select the appropriate size of the femoral prosthesis 3 according to the patient's specific situation and place it in the measuring device 2. Adjust the overall height to the appropriate position by rotating the threaded rod 1. Use the adjusting bolt 6 to lock the initial position of the sliding plate 5. The doctor holds the handle 7 and pulls it outward to overcome the force of the spring 11. At this time, the fixed block 12 and the gear block 13 attached thereto move together. The protrusion 14 at the other end of the adjustment column 8 and the gear block 13 realize the gear adjustment of the adjustment column 8. Finally, check again whether all components have been correctly set and locked in place, and prepare for subsequent surgical steps. The positioning of the femoral prosthesis can be completed quickly and accurately in a complex and changeable surgical environment, which can reduce the situation of leg length difference and related complications after surgery and improve patient satisfaction.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A total hip replacement femoral prosthesis placement position controller, characterized in that: include: Measuring device (2); A threaded hole (4), wherein the threaded hole (4) is opened at the upper end of the measuring device (2); A threaded rod (1), wherein the threaded rod (1) is threadedly connected in the threaded hole (4); A sliding plate (5), wherein the sliding plate (5) is arranged on one side of the measuring device (2); An adjusting bolt (6), wherein the adjusting bolt (6) is fixedly connected to one side end of the measuring device (2); A femoral prosthesis (3), wherein the femoral prosthesis (3) is located in the measuring device (2); An adjustment mechanism, the adjustment mechanism comprising a handle (7), a slide groove (9), a hollow groove (10), a spring (11), a fixed block (12) and a shift block (13), wherein five shift blocks (13) are provided, the hollow groove (10) is opened at the other side end of the measuring device (2), the handle (7) passes through the measuring device (2) and is located in the hollow groove (10), the fixed block (12) is fixedly connected to one side end of the handle (7), the five shift blocks (13) are all fixedly connected to one side end of the fixed block (12), the spring (11) is fixedly connected to an inner wall of one side of the hollow groove (10), and the spring (11) is sleeved on the circumferential surface of the handle (7).

2. A total hip replacement femoral prosthesis placement controller according to claim 1, characterized in that: A slide groove (9) is provided at the other side end of the measuring device (2), an adjustment column (8) is provided at one side of the measuring device (2), and a protrusion (14) and a slide block (15) are fixedly connected to both side ends of the adjustment column (8).

3. A total hip replacement femoral prosthesis placement controller according to claim 2, characterized in that: A baffle (16) is fixedly connected to one side end of the measuring device (2).

4. A total hip replacement femoral prosthesis placement controller according to claim 3, characterized in that: The surface of the baffle (16) is provided with a scale ranging from -5 mm to +15 mm.

5. A total hip replacement femoral prosthesis placement controller according to claim 4, characterized in that: The width of the slide groove (9) is 1.6 mm.

6. A total hip replacement femoral prosthesis placement position controller according to claim 5, characterized in that: The adjusting bolt (6) can adjust the position of the sliding plate (5) relative to the measuring device (2), thereby accurately controlling the insertion depth of the femoral prosthesis (3) in the patient's bone.

7. A total hip replacement femoral prosthesis placement controller according to claim 6, characterized in that: The femoral prosthesis (3) can be moved along the inside of the measuring device (2) so as to accurately adjust its position relative to the patient's bones.

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