An Angle Measuring Device for Pelvic Rotational Osteotomy

Abstract

The present invention discloses an angle measuring device for pelvic rotational osteotomy, belonging to the technical field of angle measurement for osteotomy. It includes a connecting mechanism and a support housing installed on a reduction forceps through the connecting mechanism. A circular groove is provided on the side surface of the support housing, and a disc is arranged in the circular groove. The center point of the disc is connected by a bearing with a hanging pointer. The support housing is a hollow square structure, and a viewing window penetrating through its inner and outer sides is provided on the upper surface of the support housing. The center position inside the support housing is connected to a compass through a balancing mechanism, and a guiding pointer is arranged at the center position of the upper surface of the compass. The connecting mechanism is arranged on the outer side surface of the support housing. The invention is small in volume, which is convenient for use in pelvic orthopedic surgery. In addition, the device can be easily installed on the reduction forceps, which helps to be used attached to the reduction forceps.

Description

Technical Field

[0001] The present invention relates to the technical field of osteotomy angle measurement, and specifically to an angle measurement device for pelvic rotational osteotomy. Background Art

[0002] Developmental dysplasia of the hip is a common limb deformity in infants and young children. Pelvic orthopedic surgery is an important treatment method. During the treatment, accurate measurement and control of the pelvic rotational osteotomy angle are crucial, directly affecting the degree of acetabular coverage of the femoral head, as well as the stability and development of the hip joint after reduction. Accurate angle measurement helps to achieve good head-acetabulum coverage, improve the success rate of surgery, and reduce postoperative complications.

[0003] If the angle control in pelvic rotational osteotomy surgery is not good, it may lead to unsatisfactory recovery of hip joint function in patients after surgery, problems such as pain and limited movement, seriously affecting the quality of life of patients. A precise angle measurement device can help doctors perform surgical operations more precisely, enabling patients to obtain better hip joint function after surgery and improving the quality of life.

[0004] In existing pelvic orthopedic surgeries, there is no effective device for measuring the rotational angle after osteotomy. Due to developmental dysplasia of the hip, there is often poor coverage of the femoral head by the anterior and lateral acetabulum. Therefore, when the pelvis is osteotomized and rotated, the distal end of the osteotomy site rotates forward and outward, not only in the coronal plane or sagittal plane, making it impossible to effectively measure. In addition, most angle measurement devices are relatively large in size, which is not conducive to use during surgery. As a result, the rotational angle of osteotomy during surgery depends entirely on the doctor's experience, which is not conducive to ensuring the success rate of the surgery.

[0005] Therefore, an angle measurement device for pelvic rotational osteotomy is needed to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide an angle measurement device for pelvic rotational osteotomy to solve the problem that there is no effective device for measuring the osteotomy angle in existing pelvic orthopedic surgeries as mentioned in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] An angle measurement device for pelvic rotational osteotomy includes a connecting mechanism and a support housing mounted on a reduction forceps through the connecting mechanism. A circular groove is provided on the side surface of the support housing, and a disc is arranged in the circular groove. The center point of the disc is connected by a bearing to a hanging pointer. The support housing is a hollow square structure, and a viewing window penetrating through its inner and outer sides is provided on the upper surface of the support housing. The center position inside the support housing is connected to a compass through a balancing mechanism, and a compass pointer is provided at the center position on the upper surface of the compass. The connecting mechanism is arranged on the outer side surface of the support housing.

[0009] Preferably, transparent plexiglass is provided on both the visual window and the circular groove. The plexiglass is used to seal the visual window and the circular groove, playing a role in protecting the internal structures of the visual window and the circular groove.

[0010] Preferably, the balance mechanism includes a support block connected to the central position inside the support housing. A convex groove is provided on the upper surface of the support block, and a limiting ball is slidably installed in the convex groove. A connecting rod with an axis passing through its center of the ball is connected to the limiting ball. Two limiting rods symmetric about the axis of the connecting rod are movably penetrated through the limiting ball, and both ends of the limiting rods are fixedly connected to the inside of the convex groove. A connecting block coaxial with it is provided on the connecting rod, and the upper surface of the connecting block is connected to the center position of the lower surface of the compass through a universal ball shaft. Float blocks are evenly distributed on the lower surface of the compass, and the center position of the lower surface of the compass is connected to the connecting block through a universal hose.

[0011] Preferably, three-quarters of white mineral oil is filled inside the support housing, which is used to ensure that the compass can float stably inside the support housing in a sealed environment.

[0012] Preferably, angle scales are provided on both the disc and the compass, which are used to intuitively measure angles.

[0013] Preferably, the connecting mechanism includes a fixed sleeve fixedly connected to the outside of the support housing. A piston tube 1 is fixedly penetrated through the fixed sleeve. The lower end of a piston rod 1 is seamlessly slidably connected to the inner side of the upper end of the piston tube 1. The outer side of the support housing where the piston tube 1 is located is opposite to the outer side of the support housing where the circular groove is located. Mounting blocks are axially connected to the other two sides of the support housing, and two piston tubes 2 are connected to each mounting block. The inner side of the open end of the piston tube 2 is seamlessly slidably connected to one end of a piston rod 2, and the other end of the piston rod 2 is axially connected to a U-shaped clamping part. The U-shaped clamping part is snap-connected to the reset clamp. The lower surface of the support housing is fixedly connected to a Y-shaped air pipe through a fixed bracket. The two piston tubes 2 on the same side are connected in a through manner, and the three open ends of the Y-shaped air pipe are respectively connected in a through manner to the piston tube 1 and the piston tubes 2 on both sides.

[0014] Preferably, the two piston tubes 2 connected to each mounting block form a V-shaped structure, which is used to improve the connection stability between the support housing and the reset clamp.

[0015] Preferably, the two U-shaped clamping parts on the same side face upward and downward respectively, which is used to further improve the connection stability between the support housing and the reset clamp.

[0016] Preferably, the piston rod 1 is composed of a piston disc and a screw rod. The piston disc is seamlessly slidably connected to the inner side of the upper end of the piston tube 1, and the piston disc is coaxially and bearing-connected to the screw rod. The screw rod threadedly penetrates through the upper end of the piston tube 1.

[0017] Preferably, the buoyancy of all floating blocks is greater than the total gravity of the structure composed of the compass, connecting blocks, connecting rods, and limit balls, ensuring that the compass can stably float on the white mineral oil liquid surface inside the support housing.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: The angle measuring device for pelvic rotational osteotomy is small in size, which is convenient for use in pelvic orthopedic surgery. In addition, the device can be easily installed on the reduction forceps, which helps to be used while attached to the reduction forceps:

[0019] 1. Based on the principle that the liquid level of the liquid is always horizontal, the compass can be kept horizontal under the action of the balance mechanism. In addition, the compass can move together with the support housing, so as to measure the angle of rotation in the horizontal direction when the support housing moves. Moreover, due to the fact that the hanging pointer always points downward under the action of gravity, it can cooperate with the disc in the circular groove to measure the angle of rotation in the vertical direction when the support housing moves. By measuring the angle of rotation in the horizontal direction and the angle of rotation in the vertical direction, the angles of osteotomy rotation outward and forward can be measured;

[0020] 2. The U-shaped clip is clamped on the reduction forceps. After the reduction forceps clamp the osteotomy, by rotating the first piston rod, the second piston rod can move in the second piston tube, so that the U-shaped clip applies an outward force to the reduction forceps. And there is a locking structure on the reduction forceps, so the support housing can be fixed on the reduction forceps, which is beneficial for the device to cooperate with the reduction forceps for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the front view structural schematic diagram of the present invention;

[0022] Figure 2 is the top view structural schematic diagram of the support housing of the present invention;

[0023] Figure 3 is the bottom view structural schematic diagram of the support housing of the present invention;

[0024] Figure 4 is the longitudinal sectional connection structural schematic diagram of the support housing of the present invention;

[0025] Figure 5 is of the present invention Figure 4 the enlarged structural schematic diagram of point A;

[0026] Figure 6 is the transverse sectional connection structural schematic diagram of the support housing of the present invention;

[0027] Figure 7 is of the present invention Figure 6 the enlarged structural schematic diagram of point B;

[0028] Figure 8 is the connection structural schematic diagram of the U-shaped clip and the Y-shaped air pipe of the present invention.

[0029] In the figure: 1. Reset clamp; 2. U-shaped fastener; 3. Support housing; 4. Visual window; 5. Circular groove; 6. Suspended pointer; 7. Compass; 8. Guide pointer; 9. First piston rod; 10. Fixed sleeve; 11. First piston tube; 12. Y-shaped gas pipeline; 13. Fixed support; 14. Second piston tube; 15. Second piston rod; 16. Connecting block; 17. Universal hose; 18. Floating block; 19. Connecting rod; 20. Limit ball; 21. Convex groove; 22. Limit rod; 23. Support block; 24. Mounting block. Specific implementation manner

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1 - 8 , the present invention provides the following technical solutions:

[0032] Embodiment 1: To solve the problem that the osteotomy rotation angle cannot be effectively measured in previous pelvic orthopedic surgeries, the following technical solutions are provided. Specifically, an angle measuring device for pelvic rotational osteotomy includes a connecting mechanism and a support housing 3 installed on the reset clamp 1 through the connecting mechanism. A circular groove 5 is provided on the side surface of the support housing 3, and a disc is provided in the circular groove 5. The center point of the disc is connected by a bearing to a suspended pointer 6. The support housing 3 is a hollow square structure, and a visual window 4 penetrating through its inner and outer sides is provided on the upper surface of the support housing 3. The center position inside the support housing 3 is connected to a compass 7 through a balancing mechanism, and a guide pointer 8 is provided at the center position on the upper surface of the compass 7. Transparent resin glass is provided on both the visual window 4 and the circular groove 5. The resin glass is used to seal the visual window 4 and the circular groove 5, playing a role in protecting the internal structures of the visual window 4 and the circular groove 5. Through the disc provided in the circular groove 5 and the always vertical suspended pointer 6, the rotation angle of the osteotomy in the vertical plane can be intuitively measured when the support housing 3 rotates.

[0033] The balance mechanism includes a support block 23 connected to the center position inside the support housing 3. A convex groove 21 is provided on the upper surface of the support block 23. A limit ball 20 is slidably installed in the convex groove 21. A connecting rod 19 with an axis passing through its center of the ball is connected to the limit ball 20. Two limit rods 22 symmetric about the axis of the connecting rod 19 are movably penetrated through the limit ball 20, and both ends of the limit rods 22 are fixedly connected to the inside of the convex groove 21. A connecting block 16 coaxial with it is provided on the connecting rod 19. The upper surface of the connecting block 16 is connected to the center position of the lower surface of the compass 7 through a universal ball shaft. Float blocks 18 are evenly distributed on the lower surface of the compass 7. The center position of the lower surface of the compass 7 is connected to the connecting block 16 through a universal hose 17. During use, due to the buoyancy generated by the float blocks 18 and the setting of the universal ball shaft, the compass 7 will float on the liquid surface inside the support housing 3, so as to ensure that the compass 7 is horizontal. In addition, through the limitation of the limit rods 22, it can be ensured that the compass 7 moves together with the support housing 3. During this process, the compass needle 8 always points in the same direction. By reading the angle of rotation of the compass needle 8 relative to the compass 7, it is the angle of rotation of the osteotomy in the horizontal direction. Three-quarters of white mineral oil is filled inside the support housing 3 to ensure that the compass 7 can stably float inside the support housing 3 in a sealed environment. Angle scales are provided on both the disc and the compass 7 for visually measuring angles. The buoyancy of all the float blocks 18 is greater than the total gravity of the structure composed of the compass 7, the connecting block 16, the connecting rod 19 and the limit ball 20, ensuring that the compass 7 can stably float on the white mineral oil liquid surface inside the support housing 3.

[0034] Embodiment 2: To solve the problem that the conventional angle measuring device cannot be used in cooperation with the pliers for clamping osteotomy, the following technical solution is provided. Specifically, the connecting mechanism is arranged on the outer side surface of the support housing 3.

[0035] The connecting mechanism includes a fixed sleeve 10 fixedly connected to the outer side of the support housing 3, and a piston tube 11 fixedly penetrating through the fixed sleeve 10. The inner side of the upper end of the piston tube 11 is seamlessly and slidably connected to the lower end of a piston rod 9. The outer side of the support housing 3 where the piston tube 11 is located is opposite to the outer side of the support housing 3 where the circular groove 5 is located. Two mounting blocks 24 are axially connected to the other two sides of the support housing 3, and two piston tubes 14 are connected to each mounting block 24. The inner side of the open end of the piston tube 14 is seamlessly and slidably connected to one end of a piston rod 15, and the other end of the piston rod 15 is axially connected to a U-shaped clamping member 2. The U-shaped clamping member 2 is snap-connected to the reset clamp 1. The lower surface of the support housing 3 is fixedly connected to a Y-shaped air pipe 12 through a fixed bracket 13. The two piston tubes 14 on the same side are connected through. The three open ends of the Y-shaped air pipe 12 are respectively connected to the piston tube 11 and the piston tubes 14 on both sides through. When in use, first snap the U-shaped clamping member 2 onto the reset clamp 1, and then clamp the osteotomy through the reset clamp 1. Then rotate the piston rod 9. At this time, the gas in the piston tube 11 will be conveyed to the piston tube 14 through the Y-shaped air pipe 12, so that the piston rod 15 moves outwards, so that the U-shaped clamping member 2 exerts an outward force on the reset clamp 1. Due to the locking structure provided on the reset clamp 1, the shape of the osteotomy clamped by the reset clamp 1 will be fixed, and then the position of the support housing 3 will be fixed, so as to facilitate the movement of the support housing 3 together with the reset clamp 1.

[0036] The two piston tubes 14 connected to each mounting block 24 form a V-shaped structure, which is used to improve the stability of the connection between the support housing 3 and the reset clamp 1. The two U-shaped clamping members 2 on the same side face upwards and downwards respectively, which is used to further improve the stability of the connection between the support housing 3 and the reset clamp 1. The piston rod 9 is composed of a piston disc and a screw rod. The piston disc is seamlessly and slidably connected to the inner side of the upper end of the piston tube 11, and the piston disc is coaxially and bearing-connected to the screw rod. The screw rod threadedly penetrates through the upper end of the piston tube 11.

[0037] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for measuring the angle of pelvic rotational osteotomy, comprising a connecting mechanism and a supporting shell (3) mounted on a reduction clamp (1) via the connecting mechanism, characterized in that: The side surface of the support shell (3) is provided with a circular groove (5), and a circular disc is provided in the circular groove (5); a hanging pointer (6) is connected to the center point bearing of the circular disc; the support shell (3) is a hollow square structure, and a visual window (4) penetrating the inner and outer sides thereof is provided on the upper surface of the support shell (3); the inner center position of the support shell (3) is connected to the compass (7) through a balancing mechanism, and a compass pointer (8) is provided at the center position of the upper surface of the compass (7); the connecting mechanism is provided on the outer side surface of the support shell (3), and the connecting mechanism comprises a fixing sleeve (10) fixedly connected to the outer side of the support shell (3), and a piston tube (11) is fixedly penetrated on the fixing sleeve (10); the inner side of the upper end of the piston tube (11) is seamlessly slidably connected to the lower end of the piston rod (9), and the piston tube (11) is provided with a fixing sleeve (10) fixedly connected to the outer side of the support shell (3); the fixing sleeve (10) is provided with a piston tube (11) penetrating therethrough; the inner side of the upper end of the piston tube (11) is seamlessly slidably connected to the lower end of the piston rod (9), and the piston tube (11) is provided with a fixing sleeve (10) fixedly connected to the outer side of the support shell (3); the fixing sleeve (10) is provided with a piston tube (11) fixedly penetrating therethrough; the inner side of the upper end of the piston tube (11) is seamlessly slidably connected to the lower end of the piston rod (9), and the piston tube (11) is provided with a fixing sleeve (10) fixedly connected to the outer side of the support shell (3); the fixing sleeve (10) is provided with a fixing sleeve (10) fixedly connected to the outer side of the support shell (3); the fixing sleeve (10) is provided with a fixing sleeve (10) fixedly connected to the The outer side surface of the support shell (3) where the circular groove (5) is located is opposite to the outer side surface of the support shell (3) where the circular groove (5) is located, and the other two side surfaces of the support shell (3) are both axially connected with mounting blocks (24), and each mounting block (24) is connected with two piston tubes (14), and the inner side of the open end of the piston tube (14) is seamlessly slidably connected with one end of the piston rod (15), and the other end of the piston rod (15) is axially connected with a U-shaped clamp (2), and the U-shaped clamp (2) is snap-connected to the reset clamp (1), and the lower surface of the support shell (3) is fixedly connected with a Y-shaped air supply pipe (12) through a fixing bracket (13), and the two piston tubes (14) on the same side are through-connected, and the three open ends of the Y-shaped air supply pipe (12) are respectively through-connected with the piston tube (11) and the piston tubes (14) on both sides.

2. The device for measuring the angle of pelvic rotation osteotomy according to claim 1, characterized in that: The visible window (4) and the circular groove (5) are both provided with transparent resin glass, and the resin glass is used to seal the visible window (4) and the circular groove (5), thereby protecting the internal structures of the visible window (4) and the circular groove (5).

3. The device for measuring the angle of pelvic rotation osteotomy according to claim 2, characterized in that: The balancing mechanism comprises a support block (23) connected to the center position inside the support shell (3), and a convex groove (21) is provided on the upper surface of the support block (23), a limit ball (20) is slidably installed in the convex groove (21), and the limit ball (20) is connected to a connecting rod (19) whose axis passes through the center of the ball, and two limit rods (22) symmetrical about the axis of the connecting rod (19) are movably passed through the limit ball (20), and the two ends of the limit rod (22) are fixedly connected to the convex groove (21), and a connecting block (16) coaxial with the connecting rod (19) is provided on the connecting rod (19), and the upper surface of the connecting block (16) is connected to the center position of the lower surface of the compass (7) through a universal ball shaft, and the lower surface of the compass (7) is also evenly distributed with floating blocks (18), and the center position of the lower surface of the compass (7) is connected to the connecting block (16) through a universal hose (17).

4. The device for measuring the angle of pelvic rotation osteotomy according to claim 3, characterized in that: The interior of the support shell (3) is filled with three quarters of white mineral oil, which is used to ensure that the compass (7) can stably float in the support shell (3) in a sealed environment.

5. The device for measuring the angle of pelvic rotation osteotomy according to claim 4, characterized in that: The disk and the compass (7) are both provided with angle scales for intuitively measuring angles.

6. The device for measuring the angle of pelvic rotation osteotomy according to claim 5, characterized in that: The two piston tubes (14) connected to each mounting block (24) form a V-shaped structure, which is used to improve the stability of the connection between the support housing (3) and the reset clamp (1).

7. The device for measuring the angle of pelvic rotation osteotomy according to claim 6, characterized in that: The two U-shaped clamps (2) on the same side face upward and downward respectively, and are used to further improve the stability of the connection between the support housing (3) and the reset clamp (1).

8. The device for measuring the angle of pelvic rotation osteotomy according to claim 7, characterized in that: The piston rod 1 (9) is composed of a piston disc and a screw, wherein the piston disc is seamlessly slidably connected to the inner side of the upper end of the piston tube 1 (11), and the piston disc is coaxially bearing-connected to the screw, and the screw thread passes through the upper end of the piston tube 1 (11).

9. The device for measuring the angle of pelvic rotation osteotomy according to claim 8, characterized in that: The buoyancy of all the floating blocks (18) is greater than the total gravity of the structure formed by the compass (7), the connecting block (16), the connecting rod (19) and the limiting ball (20), ensuring that the compass (7) can stably float on the white mineral oil liquid surface in the supporting shell (3).

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