Air pressure hip joint

Abstract

The utility model discloses an air pressure hip joint which comprises an acetabular cup, an acetabular liner is movably arranged on one side of the acetabular cup, a femoral head prosthesis is movably arranged on one side of the acetabular liner, the femoral head prosthesis is integrally spherical, one side of the femoral head prosthesis is a plane, a center hole is formed in the plane side of the femoral head prosthesis, and a femoral stem prosthesis is movably arranged in the center hole. A central hole is formed in the femoral head prosthesis, an air pressure cavity is formed in the inner wall of the femoral head prosthesis in the axial direction, the air pressure cavity is communicated with the central hole of the femoral head prosthesis, a micro air pump is fixedly arranged on the inner wall of the femoral head prosthesis, and a pressure sensor is fixedly arranged on the inner wall of the air pressure cavity. The air pressure in the hip joint is accurately adjusted, the air pressure is properly reduced, the pressure between articular surfaces is reduced, and wound healing is facilitated; in the later period of rehabilitation, along with recovery of the joint function of the patient, the air pressure can be gradually increased, the stability and supporting force of the joint are improved, and the patient can better adapt to daily activities.

Description

Technical Field

[0001] This utility model relates to the field of hip joint technology, and in particular to a pneumatic hip joint. Background Technology

[0002] After hip replacement surgery, if there is a bone defect around the acetabulum, the acetabular cup will be implanted into the patient's acetabulum. There may be bone defects between the acetabular cup and the ilium, ischium, pubis, etc. If the bone defect is ignored, it may lead to bone deformation around the acetabulum, thereby affecting the movement and function of the artificial joint.

[0003] Existing hip replacement surgery prostheses can deform or dislodge due to patient activity, and patients may also experience slow adaptation to the prosthesis immediately after surgery.

[0004] Therefore, we propose a pneumatic hip joint. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a pneumatic hip joint.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A pneumatic hip joint includes an acetabular cup, an acetabular liner movably disposed on one side of the acetabular cup, a femoral head prosthesis movably disposed on one side of the acetabular liner, the femoral head prosthesis being spherical in shape with one side being planar, a central hole being formed on the planar side of the femoral head prosthesis, a femoral stem prosthesis movably disposed in the central hole, an axially formed pneumatic cavity being formed on the inner wall of the femoral stem prosthesis, the pneumatic cavity being connected to the central hole of the femoral head prosthesis, a miniature air pump being fixedly disposed on the inner wall of the femoral stem prosthesis, and a pressure sensor being fixedly disposed on the inner wall of the pneumatic cavity.

[0008] As a further embodiment of this utility model: a silicone sheet is movably disposed on one side of the central hole, the silicone sheet is threadedly connected to one side of the femoral stem prosthesis, a threaded hole is opened at the bottom end of the inner wall of the central hole, a connecting screw is movably disposed on the inner wall of the femoral stem prosthesis, the connecting screw passes through the femoral stem prosthesis and is threadedly connected to the threaded hole, one side of the silicone sheet is attached to the plane side of the femoral head prosthesis, and a plurality of growth holes are opened on the surface of the silicone sheet.

[0009] As a further embodiment of this utility model: the outer surface of the acetabular cup has a rough porous structure, the inner side of the acetabular cup is a smooth hemispherical cavity, and an annular fixing groove is provided on the inner edge of the acetabular cup, the fixing groove engaging with one side of the acetabular liner.

[0010] As a further embodiment of this utility model: a limiting pad is movably provided on one side of the acetabular liner, the limiting pad is fitted with the femoral head prosthesis and threadedly connected to the acetabular liner, and a slot is provided on the inner side of the limiting pad, the slot fits the connection between the femoral head prosthesis and the acetabular liner, thereby achieving lateral limiting of the femoral head prosthesis.

[0011] As a further improvement of this invention: the femoral stem prosthesis is shaped like a slender rod, and its surface has several longitudinal grooves. The surface of the femoral stem prosthesis also has several transverse channels.

[0012] As a further improvement of this utility model: the micro air pump and the air pressure chamber should be connected by an air pipe, and the pressure sensor is located on the air inlet side of the air pressure chamber.

[0013] As a further improvement of this utility model: the pressure sensor is used to monitor the air pressure value in real time and to provide feedback to the external control equipment, and the air pump has the function of independently receiving commands from the control equipment.

[0014] Compared with the prior art, the present invention provides a pneumatic hip joint, which has the following beneficial effects:

[0015] This invention, through an implantable air pressure regulating device, can precisely adjust the air pressure within the hip joint according to the patient's different needs and rehabilitation stage. Appropriately reducing the air pressure reduces the pressure between the joint surfaces, which is beneficial for wound healing. In the later stages of rehabilitation, as the patient's joint function recovers, the air pressure can be gradually increased to improve the stability and support of the joint, enabling the patient to better adapt to daily activities.

[0016] This invention provides the acetabular cup, acetabular liner, and acetabular liner limiting pad with good joint movement performance and cushioning protection, reduces the risk of joint wear and dislocation, facilitates the patient's affected area to fit and adhere to the whole device, and improves the service life of the device.

[0017] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a pneumatic hip joint proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the axial distribution structure of the acetabular liner and limiting pad of a pneumatic hip joint proposed in this utility model.

[0020] Figure 3 This is a top view schematic diagram of the overall structure of a pneumatic hip joint proposed in this utility model;

[0021] Figure 4 This is a schematic diagram of the planar side view of a pneumatic hip joint femoral head prosthesis proposed in this utility model.

[0022] Figure 5 This is a side view sectional diagram of a pneumatic hip joint femoral stem prosthesis proposed in this utility model.

[0023] In the diagram: 1. Acetabular cup; 2. Acetabular liner; 3. Femoral head prosthesis; 4. Central hole; 5. Femoral stem prosthesis; 6. Pneumatic chamber; 7. Miniature air pump; 8. Pressure sensor; 9. Silicone sheet; 10. Threaded hole; 11. Connecting screw; 12. Growth hole; 13. Fixation groove; 14. Limiting pad; 15. Slot; 16. Longitudinal groove; 17. Transverse channel; 18. Air tube. Detailed Implementation

[0024] 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.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Example: A pneumatic hip joint, such as Figure 1 - Figure 5As shown, the device includes an acetabular cup 1, an acetabular liner 2 movably mounted on one side of the acetabular cup 1, a femoral head prosthesis 3 movably mounted on one side of the acetabular liner 2, the femoral head prosthesis 3 being spherical in shape with one side being flat, a central hole 4 opening on the flat side of the femoral head prosthesis 3, a femoral stem prosthesis 5 movably mounted in the hollow hole, an air pressure chamber 6 axially opening on the inner wall of the femoral stem prosthesis 5, the air pressure chamber 6 communicating with the central hole 4 of the femoral head prosthesis 3, a miniature air pump 7 fixedly mounted on the inner wall of the femoral stem prosthesis 5, a pressure sensor 8 fixedly mounted on the inner wall of the air pressure chamber 6, a silicone sheet 9 movably mounted on one side of the central hole 4, the silicone sheet 9 being threadedly connected to one side of the femoral stem prosthesis 5, and the central hole 4... A threaded hole 10 is provided at the bottom of the inner wall. A connecting screw 11 is movably provided on the inner wall of the femoral stem prosthesis 5. The connecting screw 11 passes through the femoral stem prosthesis 5 and is threadedly connected to the threaded hole 10. One side of the silicone sheet 9 is attached to the plane side of the femoral head prosthesis 3. Several growth holes 12 are provided on the surface of the silicone sheet 9. Through the implanted air pressure adjustment device, the air pressure in the hip joint can be precisely adjusted according to the different needs and rehabilitation stages of the patient. Appropriately reducing the air pressure reduces the pressure between the joint surfaces, which is conducive to wound healing. In the later stage of rehabilitation, as the patient's joint function recovers, the air pressure can be gradually increased to improve the stability and support of the joint, enabling the patient to better adapt to daily activities.

[0027] like Figure 1 - Figure 4 As shown, the outer surface of the acetabular cup 1 has a rough porous structure, and the inner side of the acetabular cup 1 has a smooth hemispherical cavity. An annular fixing groove 13 is provided on the inner edge of the acetabular cup 1. The fixing groove 13 engages with one side of the acetabular liner 2. A limiting pad 14 is movably provided on one side of the acetabular liner 2. The limiting pad 14 is fitted with the femoral head prosthesis 3 and threadedly connected to the acetabular liner 2. A retaining groove 15 is provided on the inner side of the limiting pad 14. The retaining groove 15 fits the connection between the femoral head prosthesis 3 and the acetabular liner 2 to achieve lateral limiting of the femoral head prosthesis 3.

[0028] like Figure 1 - Figure 3 As shown, the femoral stem prosthesis 5 is shaped like a slender rod, and its surface has several longitudinal grooves 16. The surface of the femoral stem prosthesis 5 also has several transverse channels. A micro air pump 7 and the air pressure chamber 6 should be connected by an air tube. A pressure sensor 8 is located on the air inlet side of the air pressure chamber 6. The pressure sensor 8 is used to monitor the air pressure value in real time and to provide feedback to external control equipment. The air pump has the function of independently receiving commands from the control equipment.

[0029] Working principle: During surgery, the acetabular cup 1 is implanted into the acetabular fossa, ensuring its outer surface is in close contact with the bone tissue to promote bone length fixation. Then, the acetabular liner 2 is installed inside the acetabular cup 1. After connecting the femoral head and stem, it is implanted into the medullary cavity of the proximal femur, adjusted, and fixed. During postoperative rehabilitation, the pressure sensor 8 monitors the air pressure value in the femoral stem air pressure chamber 6 in real time and transmits the data to the controller. The doctor or patient sets a target air pressure value according to rehabilitation needs through the controller. The controller compares the data from the pressure sensor 8 with the target air pressure value. If the actual air pressure is lower than the target air pressure, the controller controls the micro-air pump 7 to inflate the air pressure chamber 6, increasing the air pressure; if the actual air pressure is higher than the target air pressure, the controller controls the air pump to expel air, decreasing the air pressure.

[0030] 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 gas pressure hip joint comprising an acetabular cup (1), characterized in that The acetabular cup (1) is movably provided with an acetabular liner (2) on one side, and a femoral head prosthesis (3) is movably provided with one side of the acetabular liner (2). The femoral head prosthesis (3) is spherical in shape and one side is flat. All femoral stem prostheses (5) are provided. The inner wall of the femoral stem prosthesis (5) is provided with an air pressure chamber (6) along the axial direction. The air pressure chamber (6) is connected to the central hole (4) of the femoral head prosthesis (3). A micro air pump (7) is fixedly provided on the inner wall of the femoral stem prosthesis (5). A pressure sensor (8) is fixedly provided on the inner wall of the air pressure chamber (6).

2. A pneumatic hip joint according to claim 1, characterized in that A silicone sheet (9) is movably disposed on one side of the central hole (4). The silicone sheet (9) is threadedly connected to one side of the femoral stem prosthesis (5). A threaded hole (10) is opened at the bottom of the inner wall of the central hole (4). A connecting screw (11) is movably disposed on the inner wall of the femoral stem prosthesis (5). The connecting screw (11) passes through the femoral stem prosthesis (5) and is threadedly connected to the threaded hole (10). One side of the silicone sheet (9) is attached to the plane side of the femoral head prosthesis (3). Several growth holes (12) are opened on the surface of the silicone sheet (9).

3. The pneumatic hip joint according to claim 1, wherein The outer surface of the acetabular cup (1) is a rough porous structure, the inner side of the acetabular cup (1) is a smooth hemispherical cavity, and an annular fixing groove (13) is opened on the inner edge of the acetabular cup (1). The fixing groove (13) engages with one side of the acetabular liner (2).

4. A pneumatic hip joint according to claim 3, characterized in that, A limiting pad (14) is movably provided on one side of the acetabular liner (2). The limiting pad (14) is fitted with the femoral head prosthesis (3) and threadedly connected to the acetabular liner (2). A slot (15) is provided on the inner side of the limiting pad (14). The slot (15) fits the connection between the femoral head prosthesis (3) and the acetabular liner (2) to achieve lateral limiting of the femoral head prosthesis (3).

5. A pneumatic hip joint according to claim 4, wherein The femoral stem prosthesis (5) is shaped like a slender rod. The surface of the femoral stem prosthesis (5) has several longitudinal grooves (16) and several transverse channels (17).

6. A pneumatic hip joint according to claim 5, wherein The micro air pump (7) and the air pressure chamber (6) should be connected by an air pipe (18), and the pressure sensor (8) is located on the air inlet side of the air pressure chamber (6).

7. A pneumatic hip joint according to claim 6, characterized in that The pressure sensor (8) is used to monitor the air pressure value in real time and to provide feedback to the external control equipment. The air pump has the function of independently receiving instructions from the control equipment.

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