A total hip arthroplasty femoral side prosthesis placement position controller

Abstract

The application provides a total hip replacement femoral side prosthesis placement position controller, and belongs to the technical field of medical devices.The total hip replacement femoral side prosthesis placement position controller comprises a measurer, a threaded hole, a threaded plug, a sliding plate, an adjusting bolt and a hip replacement femoral side prosthesis placement position controller.The threaded hole is arranged at the upper end of the measurer;the threaded plug is threadedly connected in the threaded hole;the sliding plate is arranged at one side of the measurer;the adjusting bolt is fixedly connected at one side end of the measurer;the hip replacement femoral side prosthesis placement position controller is a simple controller body, which can be fixed on the neck of a femoral stem prosthesis;an adjusting column is additionally arranged at one side of the body;the surface of the baffle has a scale of -5mm to +15mm;the small hole of the sliding slot is 1.6mm in size and vertically movable, so that the Kirschner wire can pass through to determine the approximate position of the prosthesis;the device is simple to operate, can reduce the long and short leg conditions and related complications after operation, and improves the satisfaction degree of patients.

Description

Technical Field

[0001] The present 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] Currently, 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 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 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 of the femoral prosthesis in a total hip replacement, aiming to solve the problem in the prior art that, in current hip replacement surgery, the control of the equal length of the lower limbs mainly relies on visual inspection or the use of tools such as a ruler. At the same time, the placement position of the femoral prosthesis is also an important factor affecting the equal 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, which is accompanied by the occurrence of some complications.

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

[0006] A controller for inserting a femoral prosthesis in a total hip replacement, comprising:

[0007] measuring device;

[0008] A threaded hole is provided at the upper end of the measuring device;

[0009] A threaded rod, the threaded rod being threadedly connected to the threaded hole;

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

[0011] An adjusting bolt, the adjusting bolt being 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 there are five gear blocks, the hollow groove is opened at the other side end of the measuring instrument, the handle passes through the measuring instrument 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 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 bump 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 sliding 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, thereby accurately controlling 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 femoral prosthesis placement controller for hip replacement consists of a simple controller body that can be fixed to the neck of the femoral stem prosthesis. A cylindrical column is installed on one side of the body. The surface of the column has a scale of -5mm to +15mm, and a 1.6mm small hole that moves vertically to allow a Kirschner wire to pass through to determine the approximate position of the prosthesis. The device is easy to operate, can reduce leg length discrepancy and related complications after surgery, and improve patient satisfaction.

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

[0023] 3. In terms of patient recovery, 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 hospitalization time and recovery period, 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 This is the first exploded view of the present invention;

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

[0028] Figure 4 This is the 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 This 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 clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0033] Example 1

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

[0035] A controller for inserting a femoral prosthesis in a total hip replacement, comprising:

[0036] Measuring device 2;

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

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

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

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

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

[0042] Adjustment mechanism, 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 instrument 2, the handle 7 passes through the measuring instrument 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 sliding groove 9 is provided at the other side of the measuring device 2 . An adjusting column 8 is provided on 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. It is bound to the measuring device 2 through a pin, so that the effect of movement 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 adjusting 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 hollow groove 10 handle 7 moves in a specific direction, 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 As the handle 7 moves, the handle 12 also moves accordingly. There are five shift blocks 13, evenly distributed and fixed to one side of the fixed block 12. Each shift block 13 represents a different preset position and interacts with a corresponding groove or structure on the sliding plate 5 to achieve precise positioning of the femoral prosthesis 3. The chute 9 guides the movement path of the adjustment column 8. The adjustment column 8 is a key component connecting the measuring device 2 to other components. The movement directly affects the entire controller's ability to adjust the position of the femoral prosthesis. The protrusion 14 contacts the shift block 13 for adjusting the gear position and acts as a stop to prevent the adjustment column 8 from dislodging from the chute 9. The slider 15 ensures the stability and smoothness of the adjustment column 8 as it moves along the chute 9, matching the contour of the chute 9 to ensure a tight fit without unnecessary shaking. The device is easy to operate, can reduce postoperative leg length discrepancy and related complications, and improve patient satisfaction. It controls the implant depth of the prosthesis during hip replacement, thereby reducing the occurrence of lower limb length discrepancies and effectively avoiding revision surgeries caused by postoperative lower limb length discrepancies, thereby improving patient satisfaction.

[0045] For details, please refer to Figures 1-6 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 act 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 Figures 1-6 The surface of the baffle 16 is provided with a scale of -5mm to +15mm.

[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 Figures 1-6 , the width of the chute 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 Figures 1-6 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.

[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 the 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 Figures 1-6 The femoral prosthesis 3 can be moved along the inside of the measuring device 2 to accurately adjust its position relative to the patient's bones.

[0054] In this embodiment: the design of the femoral prosthesis 3 allows it to move along a specific path within 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. A guide rail or groove may be provided inside the measuring device 2 to guide the smooth movement of the femoral prosthesis 3 and maintain its correct alignment.

[0055] The working principle and usage process of the present invention are as follows: During the surgical preparation stage, first, the appropriate size of the femoral prosthesis 3 is selected according to the patient's specific situation, and it is placed in the measuring device 2. The overall height is adjusted to the appropriate position by rotating the threaded rod 1, and the initial position of the sliding plate 5 is locked using the adjusting bolt 6. 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 to it move together, and 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 length of the legs and related complications after surgery and improve patient satisfaction.

[0056] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are 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 will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A controller for inserting a femoral prosthesis in a total hip replacement, characterized by: include: Measuring device (2); A threaded hole (4), the threaded hole (4) being opened at the upper end of the measuring device (2); A threaded rod (1), wherein the threaded rod (1) is threadedly connected to the threaded hole (4); A sliding plate (5), the sliding plate (5) being arranged on one side of the measuring device (2) and being movably connected to the measuring device (2) via a latch; An adjusting bolt (6), the adjusting bolt (6) being fixedly connected to one end of the measuring device (2), the adjusting bolt (6) being used to lock the position of the sliding plate (5), and the femoral prosthesis (3) being fixed by tightening the adjusting bolt (6) after being placed in the measuring device (2); A femoral prosthesis (3), wherein the femoral prosthesis (3) is located in the measuring device (2); An adjusting mechanism, the adjusting mechanism comprises a handle (7), a slide groove (9), a hollow groove (10), a spring (11), a fixed block (12) and a shift block (13), wherein there are five shift blocks (13), the hollow groove (10) is opened on the other side 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 the inner wall of one side of the hollow groove (10), the spring (11) is sleeved on the circumferential 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 a default position, and when the handle (7) is pulled, the force of the spring (11) is overcome, and the fixed block (12) and the shift block (13) attached thereto move together with the movement of the handle (7); The other side of the measuring device (2) is further provided with a slide groove (9) and an adjusting column (8), wherein a Kirschner wire is provided in the adjusting column (8), and a protrusion (14) is fixedly connected to one side of the adjusting column (8), wherein the protrusion (14) contacts the gear block (13) and is used for adjusting the gear position, and a slider (15) is fixedly connected to the other side of the adjusting column (8), wherein the slider (15) matches the profile of the slide groove (9) and is used for ensuring the stability and smoothness of the adjusting column (8) when it moves along the slide groove (9); A baffle (16) is also fixedly connected to the other side of the measuring device (2), and the baffle (16) serves as a physical barrier to prevent the adjustment column (8) from falling out of one end of the slide groove (9); The surface of the baffle (16) is provided with a scale of -5mm to +15mm, and each gear position is 5mm, corresponding to each gear block (13).

2. A total hip replacement femoral prosthesis placement controller according to claim 1, characterized in that: The width of the slide groove (9) is 1.6 mm.

3. A total hip replacement femoral prosthesis placement controller according to claim 2, 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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