Prosthesis dislocation prevention control device used after hip replacement

Abstract

The utility model relates to an anti-dislocation control device for a prosthesis after hip replacement, which comprises two U-shaped leg supporting plates, and binding laces are arranged at openings of the U-shaped leg supporting plates, and is characterized in that distance control structures are arranged at opposite positions of the two leg supporting plates; the distance control structure comprises supporting seats located on the leg supporting plate and an adjustable telescopic rod connected between the supporting seats, the adjustable telescopic rod comprises connecting rod bodies at the two ends and an adjusting sleeve in the middle, forward and reverse internal threads are arranged at the two ends of the interior of the adjusting sleeve, and the adjusting ends of the two connecting rods are also forward and reverse threads. And the screw threads are respectively inserted into the adjusting sleeve to form a screw thread pair. The distance between the two supporting plates is adjusted by adjusting a thread pair composed of the sleeve and the connecting rod, so that the distance between the two thighs of a patient is adjusted, the patient meets the post-operation body position requirement, and dislocation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices for auxiliary positioning after orthopedic surgery, in particular to a prosthesis anti-dislocation control device after hip replacement surgery. Background Art

[0002] After hip replacement surgery, the muscle tissue and related tendons around the joint do not form a firm connection and protection for the joint. When the patient's body position changes too much, the hip joint that has just been replaced is easily dislocated. Dislocation not only causes pain to the patient, but also requires medical staff to perform manual reduction. Some patients cannot be reduced by manual reduction and have to undergo a second operation, which is even more painful. Most medical staff control the relative angle β of the two thighs by putting a pillow between the patient's two thighs as temporary support, but the control is not very ideal. In order to further solve this problem, medical staff have designed various devices for fixing the hip joint to fix the angle of the thigh, thereby fixing the hip joint. The Chinese utility model patent with announcement number: CN213525748U provides a hip joint fixing device, which adjusts the relative swing amplitude of the patient's two thighs through a screw and a screw tube between two fixing sleeves respectively mounted on the thighs. The adjustment structure can control the relative angle between the patient's two thighs, but after the control, the possible movements of the two legs are also controlled, which is also a limitation for postoperative rehabilitation training. If the device is directly removed for rehabilitation training, the protection and limiting effects are lost, and there is a risk of dislocation during training. It is necessary to propose an apparatus that can both prevent the legs from dislodging and provide a certain amount of activity space, so as to assist patients in simple rehabilitation training as early as possible. Utility Model Content

[0003] The utility model aims to solve the above problems and provides a prosthesis anti-dislocation control device after hip replacement surgery.

[0004] The technical solution of the utility model is: a prosthesis anti-dislocation control device after hip replacement surgery, including two U-shaped leg support plates, and a binding strap is provided at the opening of the U-shaped leg support plate, and its characteristics are: the relative position of the two leg support plates is provided with a distance control structure, and the distance control structure includes a support seat located on the leg support plate and an adjustable telescopic rod connected between the support seats, and the adjustable telescopic rod includes a connecting rod body at both ends and an adjustment sleeve in the middle, and the two ends of the adjustment sleeve are positive and reverse internal threads, and the two adjustment ends of the connecting rod are also positive and reverse threads, which are respectively inserted into the adjustment sleeve to form a thread pair. The distance between the two support plates is adjusted by adjusting the thread pair composed of the sleeve and the connecting rod, thereby adjusting the distance between the two thighs of the patient to meet the postoperative body position requirements and avoid dislocation.

[0005] Preferably, the support seat is provided with a spherical socket and a socket opening, a ball head is provided at the mounting end of the connecting rod, the ball head is installed in the spherical socket to form a spherical pair, and the rod body of the connecting rod passes through the socket opening. The two ends of the telescopic rod can rotate within a certain angle range through the spherical pair, providing room for the patient's initial thigh micro-movement, which is conducive to early thigh micro-movement training.

[0006] Preferably, the diameter of the socket of the support seat is larger than the diameter of the connecting rod body, and a conical trumpet mouth extending outward from the socket is provided on the outside of the socket, and a limit plug is installed on the connecting rod body near the ball head, and the limit plug includes a coaxially stacked conical body and a polygonal operating body, the front end diameter of the conical body is smaller than the outer end diameter of the trumpet mouth, and the axial direction of the limit plug is a threaded hole matching the thread on the connecting rod body, and the threaded hole passes through the conical body and the polygonal operating body; by rotating the limit plug and adjusting the degree to which the vertebral body is inserted into the trumpet mouth, the swing amplitude of the connecting rod relative to the support seat can be changed, and the tighter the insertion, the smaller the swing amplitude of the connecting rod; after it is completely inserted, the connecting rod cannot swing; how much is inserted is gradually adjusted according to the patient's postoperative recovery, from being tightly inserted and unable to swing after surgery to gradually loosening during initial rehabilitation training when the back two thighs need relatively slight movements, and dynamic adjustment can be made.

[0007] Preferably, the taper of the frustum of the stopper is the same as the taper of the bell mouth of the socket. The two conical surfaces can fit together, thus ensuring the stability and firmness of the connecting rod when it is necessary to fix it after surgery.

[0008] Preferably, the support seat includes a fixed seat connected to the leg support plate and a movable seat connected to the fixed seat by screws; the fixed seat and the movable seat are symmetrical in shape, both of which are hemispherical ball sockets and semi-trumpet mouths in the middle, and both sides are connecting side panels, and the screws connect the connecting side panels of the fixed seat and the movable seat together, and clamp the ball head of the connecting rod in the spherical socket; the coordinated use of the fixed seat and the movable seat can realize the installation and disassembly of the ball head at the end of the connecting rod, which is conducive to later adjustment and maintenance.

[0009] Preferably, the two U-openings of the U-shaped leg support plate face outwards respectively, and the support seat is located in the middle of the back of the U-shaped leg support plate.

[0010] Preferably, the two U-openings of the U-shaped leg support plate face the rear side or the front side respectively, and the support seat is located in the middle of the inner edge of the U-shaped leg support plate.

[0011] Preferably, the U-shaped leg support plate has two tying straps, which can firmly tie the thighs to the U-shaped leg support plate, so that the position and angle between the two thighs can be adjusted by the adjustable telescopic rod.

[0012] Preferably, the inner surface of the U-shaped leg support plate is covered with a flexible material layer, and the U-shaped leg support plate is made of transparent acrylic material, which can provide comfort when fixed.

[0013] Preferably, an adjustment operating wheel is provided in the middle of the adjustment sleeve for easy operation.

[0014] The beneficial effects of the utility model are:

[0015] The utility model discloses a prosthesis anti-dislocation control device after hip replacement, which adjusts the distance between the two support plates by adjusting the threaded pair composed of the sleeve and the connecting rod, thereby adjusting the distance between the two thighs of the patient to meet the postoperative body position requirement and avoid dislocation; further, by adjusting the degree to which the cone body is inserted into the bell mouth, the swing amplitude of the connecting rod relative to the support seat can be changed; just after the operation, the cone body can be inserted and locked to prevent the two thighs from swinging relative to each other, and after the patient recovers for a few days, the cone body can be withdrawn a little from the bell mouth, so that a slight swing can be generated between the two thighs, which is convenient for the simplest rehabilitation training, and at the same time, the movement can be restricted beyond the postoperative body position requirement to ensure safety and prevent dislocation, thereby changing the control method in the prior art that can only fix the two thighs to a control method that allows limited movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the main structure of the anti-dislocation control device in the first embodiment;

[0017] Figure 2 yes Figure 1 AA cross-sectional structural diagram;

[0018] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure:

[0019] Figure 4 yes Figure 1 A schematic diagram of the three-dimensional structure of the adjustable telescopic rod;

[0020] Figure 5 for Figure 1 One of the three-dimensional structural diagrams of the components related to the U-shaped leg support plate;

[0021] Figure 6 for Figure 1 The second schematic diagram of the three-dimensional structure of the components related to the U-shaped leg support plate;

[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the anti-dislocation control device in the second embodiment;

[0023] In the figure: 1. U-shaped leg support plate, 2 adjustable telescopic rod, 11. binding strap, 12. flexible material layer, 13. support seat, 131. fixed seat, 132. movable seat, 133. trumpet mouth, 134. spherical socket, 135. socket mouth, 21. adjustment sleeve, 211. adjustment operating wheel, 22. connecting rod body, 221. thread, 222. ball head, 23. limit plug, 231. multi-faceted operating body, 232. frustum body. DETAILED DESCRIPTION

[0024] Example 1: See Figure 1-6 The figure shows a prosthesis anti-dislocation control device after hip replacement surgery, comprising two U-shaped leg support plates 1, and a tying strap 11 is provided at the opening of the U-shaped leg support plate 1. The feature is that: a distance control structure is provided for the relative positions of the two leg support plates, and the distance control structure comprises a support seat 13 located on the leg support plate and an adjustable telescopic rod 2 connected between the support seats 13, and the adjustable telescopic rod 2 comprises a connecting rod body at both ends and an adjusting sleeve 21 in the middle, and the two ends of the adjusting sleeve 21 are positive and reverse internal threads 221, and the two connecting rod adjustment ends are also positive and reverse threads 221, which are respectively inserted into the adjusting sleeve 21 to form a pair of threads 221; the distance between the two support plates is adjusted by adjusting the pair of threads 221 formed by the sleeve 21 and the connecting rod, thereby adjusting the distance between the two thighs of the patient to meet the postoperative posture requirements and avoid dislocation.

[0025] The support seat 13 is provided with a spherical socket 134 and a socket opening 135, and a ball head 222 is provided at the installation end of the connecting rod. The ball head 222 is installed in the spherical socket 134 to form a spherical pair, and the rod body of the connecting rod passes through the socket opening 135; the two ends of the retractable rod can form a rotation within a certain angle range through the spherical pair, providing room for the patient's initial slight thigh movement, which is conducive to early thigh micro-movement training.

[0026] The diameter of the socket 135 of the support seat 13 is larger than the diameter of the connecting rod body 22. A cone-shaped bell mouth 133 extending outward from the socket 135 is provided outside the socket 135. A limit plug 23 is installed near the ball head 222 on the connecting rod body 22. The limit plug includes a coaxially stacked cone body 232 and a multi-faceted operating body 231. The front end diameter of the cone body 232 is smaller than the outer end diameter of the bell mouth 133. The axial direction of the limit plug is a threaded hole 221 matching the thread 221 on the connecting rod body 22. The threaded hole 221 passes through the cone body 232 and the multi-faceted operating body 231. By rotating the limit plug and adjusting the degree to which the cone body is inserted into the bell mouth 133, the swing amplitude of the connecting rod relative to the support seat 13 can be changed. The tighter the insertion, the smaller the swing amplitude of the connecting rod. After being completely inserted tightly, the connecting rod cannot swing; how much is inserted can be gradually adjusted according to the patient's postoperative recovery, from being so tightly inserted that it cannot swing after surgery to gradually loosening it during initial rehabilitation training when the back two thighs need relatively slight movements, and dynamic adjustments can be made.

[0027] The taper of the frustum body 232 of the stopper is the same as the taper of the bell mouth 133 of the socket 135. The two conical surfaces can fit together, so that the stability and firmness of the connecting rod when it is necessary to fix it after surgery can be ensured.

[0028] The support seat 13 includes a fixed seat 131 connected to the leg support plate and a movable seat 132 connected to the fixed seat 131 by screws; the fixed seat 131 and the movable seat 132 are symmetrical in shape, both of which are hemispherical ball sockets and semi-bell mouths 133 in the middle, and both sides are connecting side panels. The screws connect the connecting side panels of the fixed seat 131 and the movable seat 132 together, and clamp the ball head 222 of the connecting rod in the spherical socket 134; the coordinated use of the fixed seat 131 and the movable seat 132 can realize the installation and disassembly of the ball head 222 at the end of the connecting rod, which is beneficial to the later adjustment and maintenance.

[0029] The two U openings of the U-shaped leg support plate 1 face outwards respectively, and the support seat 13 is located in the middle of the back of the U-shaped leg support plate 1 .

[0030] The U-shaped leg support plate 1 has two tying straps 11. The thighs can be firmly tied to the U-shaped leg support plate 1, so that the position and angle between the two thighs can be adjusted through the adjustable telescopic rod 2.

[0031] The inner surface of the U-shaped leg support plate 1 is covered with a flexible material layer 12. The U-shaped leg support plate 1 is made of transparent acrylic material, which can provide comfort when fixed.

[0032] An adjustment operating wheel 211 is provided in the middle of the adjustment sleeve 21 for easy operation.

[0033] The use process of the prosthesis anti-dislocation control device after hip replacement:

[0034] 1. This device is used for positioning just after surgery.

[0035] Make the patient lie flat on the bed, tie and fix the patient's two thighs through two U-shaped leg support plates 1 respectively, fix the connecting rod body 22 with one hand, and rotate the adjustment sleeve 21 with the other hand to adjust the retracted rod to adjust the distance between the two thighs, so that the relative angle between the two thighs is adjusted to a suitable position, wherein the limit plug is tightened and fits with the bell mouth 133 to achieve relative fixation between the connecting rod body 22 and the support seat 13, thereby achieving the fixation of the initial angle between the two legs.

[0036] The axial direction of the U-shaped leg support plate 1 and the axial direction of the bell mouth 133 of the support seat 13 have a certain initial angle α, and the initial angle is required to match the angle β of the two thighs after hip replacement surgery.

[0037] 2. After a period of postoperative recovery, the device is in a limited state of activity.

[0038] Slightly loosen the limit plug and withdraw it a certain distance from the back of the speaker, so that the connecting rod body 22 can achieve a certain range of swing under the support of the spherical pair formed by the ball head 222 and the spherical socket 134. In this way, the patient's two thighs can achieve a small range of swing, which is conducive to medical staff guiding them to perform simple rehabilitation movements and conduct early micro-motion training.

[0039] Example 2: See Figure 7 The second embodiment is basically the same as the first embodiment, and the similarities are not repeated here. The difference is that the two U openings of the U-shaped leg support plate 1 in the second embodiment are respectively facing the rear side or the front side, and the support seat 13 is located in the middle of the inner edge of the U-shaped leg support plate 1. The use process is basically the same as the first embodiment and is not repeated here, except that the device in the second embodiment is more suitable for patients lying in a supine or prone position.

Claims

1. A prosthesis anti-dislocation control device after hip replacement surgery, comprising two U-shaped leg support plates, with tying straps provided at the openings of the U-shaped leg support plates, characterized in that: The relative positions of the two leg support plates are provided with a distance control structure, which includes a support seat located on the leg support plate and an adjustable telescopic rod connected between the support seats. The adjustable telescopic rod includes a connecting rod body at both ends and an adjustment sleeve in the middle. The two ends of the adjustment sleeve are positive and reverse internal threads, and the two adjustment ends of the connecting rod are also positive and reverse threads, which are respectively inserted into the adjustment sleeve to form a thread pair.

2. The prosthesis anti-dislocation control device after hip replacement surgery according to claim 1, characterized in that: A spherical socket and a socket opening are arranged inside the support seat, a ball head is arranged at the installation end of the connecting rod, the ball head is installed in the spherical socket to form a spherical pair, and the rod body of the connecting rod passes through the socket opening.

3. The prosthesis anti-dislocation control device after hip replacement surgery according to claim 2, characterized in that: The diameter of the socket of the support seat is larger than the diameter of the connecting rod body, and a frusto-conical trumpet mouth extending outward from the socket is provided on the outside of the socket. A limit plug is mounted on the connecting rod body near the ball head, and the limit plug includes a coaxially stacked frusto-conical body and a polygonal operating body. The front end diameter of the frusto-conical body is smaller than the outer end diameter of the trumpet mouth. The axial direction of the limit plug is a threaded hole matching the thread on the connecting rod body, and the threaded hole passes through the frusto-conical body and the polygonal operating body.

4. The prosthesis anti-dislocation control device after hip replacement surgery according to claim 3, characterized in that: The taper of the frustum of the stopper is the same as the taper of the bell mouth of the socket.

5. The prosthesis anti-dislocation control device after hip replacement surgery according to claim 2, characterized in that: The support seat includes a fixed seat connected to the leg support plate and a movable seat connected to the fixed seat by screws; the fixed seat and the movable seat are symmetrical in shape, both of which are hemispherical ball sockets and semi-flared mouths in the middle, and both sides are connecting side panels. The screws connect the connecting side panels of the fixed seat and the movable seat together, and clamp the ball head of the connecting rod in the spherical socket.

6. The prosthesis anti-dislocation control device after hip replacement surgery according to claim 1, characterized in that: The two U openings of the U-shaped leg support plate face outwards respectively, and the support seat is located in the middle of the back of the U-shaped leg support plate.

7. The prosthesis anti-dislocation control device after hip replacement surgery according to claim 1, characterized in that: The two U openings of the U-shaped leg support plate are respectively oriented toward the rear side or the front side, and the support seat is located in the middle of the inner side edge of the U-shaped leg support plate.

8. The prosthesis anti-dislocation control device after hip replacement surgery according to claim 1, characterized in that: The U-shaped leg support plate has two tying straps.

9. The prosthesis anti-dislocation control device after hip replacement surgery according to claim 1, characterized in that: The inner surface of the U-shaped leg support plate is covered with a flexible material layer, and the U-shaped leg support plate is made of transparent acrylic material.

10. The prosthesis anti-dislocation control device after hip replacement surgery according to claim 1, characterized in that: An adjusting operating wheel is arranged in the middle of the adjusting sleeve.

Images