Auxiliary device for joint replacement surgery

Abstract

The invention relates to the technical field of medical instruments, and discloses an auxiliary device for joint replacement surgery, which comprises a screw limiting type clamping mechanism and a screw length adjusting mechanism. The auxiliary device for the joint replacement surgery can be clamped on the surface of a mattress according to actual conditions, so that the wide range of use conditions is achieved, in addition, the device controls the specific flexion angle of a knee joint by controlling the distance between the ankle and the waist of a patient, the angle is adjustable and controllable, and the use effect is good. Therefore, stability of the lower limbs of the patient is guaranteed, and manpower resources are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an auxiliary device for joint replacement surgery. Background Art

[0002] Osteoarthritis of the knee is common in clinical practice, and is usually treated with conservative medication, arthroscopic cleaning, and artificial knee replacement, among which artificial knee replacement is the most effective. However, in artificial knee replacement surgery, the patient needs to flex the knee 90 degrees for femoral osteotomy and suture the surgical incision, and the surgery requires tibial osteotomy for knee dislocation. In the prior art, a round pillow is usually placed on the foot or the surgeon assists in keeping the knee flexed at 90 degrees for surgical operations. Due to the long operation time, the patient's lower limbs will become unstable after a period of time, and it also causes a waste of human resources. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present invention provides an auxiliary device for joint replacement surgery, which can be clamped on the surface of a mattress according to actual conditions, thereby having a wide range of usage conditions. In addition, the device controls the distance between the ankle and the patient's waist, thereby controlling the specific flexion angle of the knee joint, and the angle is adjustable and controllable, thereby ensuring the stability of the patient's lower limbs, saving human resources, and solving the above-mentioned technical problems.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an auxiliary device for joint replacement surgery, comprising an elastic textile sleeve that can be put on the ankle, a traction rope with one end fixed to the outer circumferential surface of the elastic textile sleeve, and a No. 1 docking plate installed at the other end of the traction rope, and also comprising a screw-limited clamping mechanism, in which a lower stepped clamping plate and an upper stepped clamping plate that can be clamped on the surface of a mattress are arranged, a No. 1 externally threaded rod installed between the lower stepped clamping plate and the upper stepped clamping plate and capable of causing relative movement of the lower stepped clamping plate and the upper stepped clamping plate when rotating, and a No. 1 externally threaded rod capable of A polygonal limit rod No. 1 that prevents the lower stepped clamping plate and the upper stepped clamping plate from rotating relative to each other; and a screw-type length adjustment mechanism, which is internally provided with a No. 2 externally threaded rod and a No. 3 externally threaded rod fixedly connected to the No. 1 docking plate and the No. 1 polygonal limit rod, a horizontal threaded sleeve that is threadedly connected to the No. 2 externally threaded rod and the No. 3 externally threaded rod and can change the distance between the No. 2 externally threaded rod and the No. 3 externally threaded rod when rotating, and a No. 2 polygonal limit rod that is inserted at the axis of the No. 2 externally threaded rod and the No. 3 externally threaded rod and can prevent the No. 2 externally threaded rod and the No. 3 externally threaded rod from rotating relative to each other.

[0005] Preferably, the screw-limited clamping mechanism comprises a lower stepped clamping plate and an upper stepped clamping plate, the lower stepped clamping plate and the upper stepped clamping plate are both provided with a rack structure on the clamping end faces, a No. 1 rod body mounting hole is provided in the upper stepped clamping plate, an internal threaded hole is provided at a position corresponding to the No. 1 rod body mounting hole of the lower stepped clamping plate, corresponding polygonal limiting holes are provided in the lower stepped clamping plate and the upper stepped clamping plate, a No. 1 externally threaded rod capable of rotation is installed in the No. 1 rod body mounting hole through a bearing on the upper stepped clamping plate, A hexagonal nut is fixedly installed at one end of the No. 1 externally threaded rod, and the rod body at the other end of the No. 1 externally threaded rod passes through the internally threaded hole and is installed in the internally threaded hole through a No. 1 internally threaded structure. A limiting head is fixedly installed at the end of the No. 1 externally threaded rod near the internally threaded hole, and a No. 1 polygonal limiting rod is installed in the polygonal limiting holes of the lower step-shaped clamping plate and the upper step-shaped clamping plate. A limiting head is fixedly installed at each end of the No. 1 polygonal limiting rod, and a No. 2 docking plate with an integrated structure therewith is provided in the middle of the rod body of the No. 1 polygonal limiting rod.

[0006] Preferably, the No. 1 internal thread structure includes an internal thread structure arranged in the internal thread hole and an external thread structure arranged on the No. 1 external thread rod body, and the internal thread structure matches the external thread structure.

[0007] Preferably, the structural shape of the cross section of the polygonal limiting hole is consistent with the structural shape of the cross section of the No. 1 polygonal limiting rod, both are polygonal structures, and the structural dimensions of the cross section of the polygonal limiting hole match the structural dimensions of the cross section of the No. 1 polygonal limiting rod.

[0008] Preferably, the screw-type length adjustment mechanism comprises a horizontal threaded sleeve, a No. 2 externally threaded rod and a No. 3 externally threaded rod, one end of the horizontal threaded sleeve is provided with a No. 1 internally threaded cavity with an inner concave structure, the other end of the horizontal threaded sleeve is provided with a No. 2 internally threaded cavity with an inner concave structure, the rod body of the No. 2 externally threaded rod is installed in the interior of the No. 1 internally threaded cavity through the No. 2 threaded structure, the rod body of the No. 3 externally threaded rod is installed in the interior of the No. 2 internally threaded cavity through the No. 3 threaded structure, the No. 2 externally threaded rod and the No. 3 externally threaded rod are provided with polygonal limiting cavities with inner concave structures at opposite ends, a No. 2 polygonal limiting rod inserted into the polygonal limiting cavity is fixedly installed in the center of the horizontal threaded sleeve, one end of the No. 2 externally threaded rod is provided with a No. 1 connecting plate which is integrally connected with the No. 2 externally threaded rod and fixedly connected with the corresponding end face of the No. 1 docking plate, and one end of the No. 3 externally threaded rod is provided with a No. 2 connecting plate which is integrally connected with the No. 2 externally threaded rod and fixedly connected with the corresponding end face of the No. 2 docking plate.

[0009] Preferably, the structural shape of the polygonal limit cavity cross section is consistent with the structural shape of the cross section of the second polygonal limit rod, both are polygonal structures, and the structural dimensions of the polygonal limit cavity cross section match the structural dimensions of the cross section of the second polygonal limit rod.

[0010] Preferably, the No. 2 thread structure includes an internal thread structure arranged inside the No. 1 internal thread cavity and an external thread structure arranged on the rod body of the No. 2 external thread rod, and the No. 3 thread structure includes an internal thread structure arranged inside the No. 2 internal thread cavity and an external thread structure arranged on the rod body of the No. 3 external thread rod, and the spiral direction of the No. 2 thread structure is opposite to the spiral direction of the No. 3 thread structure.

[0011] Compared with the prior art, the present invention provides an auxiliary device for joint replacement surgery, which has the following beneficial effects:

[0012] It can be clamped on the surface of the mattress according to actual conditions, thus having a wide range of usage conditions. In addition, the device controls the specific flexion angle of the knee joint by controlling the distance between the ankle and the patient's waist, and this angle is adjustable and controllable, thereby ensuring the stability of the patient's lower limbs and saving human resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A perspective view of the present invention;

[0014] Figure 2 is a three-dimensional cross-sectional view of the present invention;

[0015] Figure 3 It is a three-dimensional diagram of the screw rod limiting clamping mechanism in the present invention;

[0016] Figure 4 It is a three-dimensional cross-sectional view of the screw-limited clamping mechanism of the present invention;

[0017] Figure 5 is a three-dimensional diagram of the screw-type length adjustment mechanism of the present invention;

[0018] Figure 6 It is a three-dimensional cross-sectional view of the screw-type length adjustment mechanism in the present invention.

[0019] Among them: 1. Elastic textile sleeve; 2. No. 1 docking plate; 3. Towing rope; 4. Screw-type limiting clamping mechanism; 41. Lower step-shaped clamping plate; 42. Upper step-shaped clamping plate; 43. Rack structure; 44. No. 1 rod body mounting hole; 45. Internal thread hole; 46. Polygonal limiting hole; 47. No. 1 external threaded rod; 48. Hexagonal nut; 49. Limiting head; 410. No. 1 polygonal limiting rod; 411. No. 2 docking plate; 412. No. 1 internal thread structure; 5. Screw-type length adjustment mechanism; 51. Horizontal threaded sleeve; 52. No. 1 internal thread cavity; 53. No. 2 internal thread cavity; 54. No. 2 thread structure; 55. No. 3 thread structure; 56. No. 2 external threaded rod; 57. No. 3 external threaded rod; 58. No. 1 connecting plate; 59. No. 2 connecting plate; 510. Polygonal limiting cavity; 511. No. 2 polygonal limiting rod. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1 and Figure 2 , an auxiliary device for joint replacement surgery, including an elastic textile sleeve 1 that can be put on the ankle, a traction rope 3 with one end fixed to the outer circumference of the elastic textile sleeve 1, and a No. 1 docking plate 2 installed at the other end of the traction rope 3. The elastic textile sleeve 1 is put on the patient's ankle, and then the screw-limited clamping mechanism 4 is clamped on the bed sheet or mattress near the patient's waist. Since the bed sheet or mattress is fixed by the patient's back pressure and cannot move, the screw-limited clamping mechanism 4 is in a regional position.

[0022] For a more convenient way to fix, see Figure 1 , Figure 2 , Figure 3 and Figure 4, it is necessary to set up a screw-limited clamping mechanism 4, which is provided with a lower stepped clamping plate 41 and an upper stepped clamping plate 42 that can be clamped on the surface of the mattress, a No. 1 external threaded rod 47 installed between the lower stepped clamping plate 41 and the upper stepped clamping plate 42 and can make the lower stepped clamping plate 41 and the upper stepped clamping plate 42 move relative to each other when rotating, and a screw-limited clamping mechanism 4 that can prevent the lower stepped clamping plate 41 and the upper stepped clamping plate 42 from rotating relative to each other. The polygonal limiting rod 410, for example, rotates the hexagonal nut 48 to drive the external threaded rod 47 to rotate, and due to the internal thread structure 412, the lower step-shaped clamping plate 41 and the upper step-shaped clamping plate 42 will move away from or approach each other. By utilizing this principle, the rack structure 43 of the lower step-shaped clamping plate 41 and the upper step-shaped clamping plate 42 can be clamped on the bed sheet or mattress near the patient's waist, thereby achieving a more convenient fixing method.

[0023] For the specific structure of the screw rod limiting clamping mechanism 4, please refer to Figure 3 and Figure 4 , including a lower stepped clamping plate 41 and an upper stepped clamping plate 42, the lower stepped clamping plate 41 and the upper stepped clamping plate 42 are both provided with a rack structure 43 on the clamping end surface, the upper stepped clamping plate 42 is provided with a No. 1 rod body mounting hole 44, the lower stepped clamping plate 41 is provided with an internal threaded hole 45 at a position corresponding to the No. 1 rod body mounting hole 44, the lower stepped clamping plate 41 and the upper stepped clamping plate 42 are provided with corresponding polygonal limiting holes 46, the upper stepped clamping plate 42 is provided with a No. 1 externally threaded rod 47 that can rotate in the No. 1 rod body mounting hole 44 through a bearing, one end of the No. 1 externally threaded rod 47 is fixedly installed with a hexagonal nut 48, the rod body of the other end of the No. 1 externally threaded rod 47 passes through the internally threaded hole 45 and is installed in the internally threaded hole 45 through the No. 1 internally threaded structure 412, the No. 1 externally threaded rod 47 is located at the internally threaded hole 4 5, a limiting head 49 is fixedly installed at the end near the lower stepped clamping plate 41 and the upper stepped clamping plate 42, a polygonal limiting rod 410 is installed in the polygonal limiting hole 46, a limiting head 49 is fixedly installed at both ends of the polygonal limiting rod 410, a second docking plate 411 with an integrated structure is arranged in the middle of the rod body of the polygonal limiting rod 410, the No. 1 internal thread structure 412 includes an internal thread structure arranged in the internal thread hole 45 and an external thread structure arranged on the rod body of the No. 1 external thread rod 47, and the internal thread structure matches the external thread structure, the structural shape of the cross section of the polygonal limiting hole 46 is consistent with the structural shape of the cross section of the No. 1 polygonal limiting rod 410, both are polygonal structures, and the structural dimensions of the cross section of the polygonal limiting hole 46 match the structural dimensions of the cross section of the No. 1 polygonal limiting rod 410.

[0024] In order to adjust and control the specific flexion angle of the patient's knee joint, please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6 , it is necessary to set a screw-type length adjustment mechanism 5, which is provided with a second external threaded rod 56 and a third external threaded rod 57 fixedly connected to the first docking plate 2 and the first polygonal limiting rod 410, a horizontal threaded sleeve 51 that is threadedly connected to the second external threaded rod 56 and the third external threaded rod 57 and can change the distance between the second external threaded rod 56 and the third external threaded rod 57 when rotating, and a second polygonal limiting rod 511 that is inserted into the axis of the second external threaded rod 56 and the third external threaded rod 57 and can prevent the second external threaded rod 56 and the third external threaded rod 57 from rotating relative to each other, and the horizontal threaded sleeve 51 is directional rotated Since the spiral direction of the No. 2 threaded structure 54 is opposite to the spiral direction of the No. 3 threaded structure 55, and during the rotation process, the existence of the No. 2 polygonal limiting rod 511 prevents the No. 2 externally threaded rod 56 and the No. 3 externally threaded rod 57 from relative rotation. Therefore, the distance between the No. 2 externally threaded rod 56 and the No. 3 externally threaded rod 57 will change, thereby changing the distance between the clamped part of the bed sheet or mattress and the patient's ankle, thereby controlling the angle of the patient's knee joint after bending. Medical staff can make adjustments according to the specific angle, thereby achieving the adjustment and control effect of the specific flexion angle of the patient's knee joint.

[0025] For the specific structure of the screw-type length adjustment mechanism 5, please refer to Figure 5 and Figure 6, including a horizontal threaded sleeve 51, a No. 2 external threaded rod 56 and a No. 3 external threaded rod 57, one end of the horizontal threaded sleeve 51 is provided with a No. 1 internal threaded cavity 52 with an inner concave structure, and the other end of the horizontal threaded sleeve 51 is provided with a No. 2 internal threaded cavity 53 with an inner concave structure, the rod body of the No. 2 external threaded rod 56 is installed in the interior of the No. 1 internal threaded cavity 52 through the No. 2 threaded structure 54, and the rod body of the No. 3 external threaded rod 57 is installed in the interior of the No. 2 internal threaded cavity 53 through the No. 3 threaded structure 55, the No. 2 external threaded rod 56 and the No. 3 external threaded rod 57 are provided with a polygonal limiting cavity 510 with an inner concave structure at the opposite ends, a No. 2 polygonal limiting rod 511 inserted into the polygonal limiting cavity 510 is fixedly installed in the center of the horizontal threaded sleeve 51, and one end of the No. 2 external threaded rod 56 is provided with a structure integral with it and fixedly connected to the corresponding end face of the No. 1 docking plate 2 A No. 1 connecting plate 58, one end of the No. 3 externally threaded rod 57 is provided with a No. 2 connecting plate 59 which is an integral structure therewith and fixedly connected to the corresponding end face of the No. 2 docking plate 411, the structural shape of the cross section of the polygonal limiting cavity 510 is consistent with the structural shape of the cross section of the No. 2 polygonal limiting rod 511, both are polygonal structures, and the structural dimensions of the cross section of the polygonal limiting cavity 510 match the structural dimensions of the cross section of the No. 2 polygonal limiting rod 511, the No. 2 threaded structure 54 includes an internal threaded structure arranged inside the No. 1 internal threaded cavity 52 and an external threaded structure arranged on the rod body of the No. 2 externally threaded rod 56, the No. 3 threaded structure 55 includes an internal threaded structure arranged inside the No. 2 internal threaded cavity 53 and an external threaded structure arranged on the rod body of the No. 3 externally threaded rod 57, and the spiral direction of the No. 2 threaded structure 54 is opposite to the spiral direction of the No. 3 threaded structure 55.

[0026] When in use, the elastic textile sleeve 1 is placed on the patient's ankle, and the hexagonal nut 48 is rotated to drive the No. 1 external threaded rod 47 to rotate. Due to the No. 1 internal thread structure 412, the lower stepped clamping plate 41 and the upper stepped clamping plate 42 will move away from or approach each other. Using this principle, the rack structure 43 of the lower stepped clamping plate 41 and the upper stepped clamping plate 42 is clamped on the bed sheet or mattress near the patient's waist. Since the bed sheet or mattress is fixed by the patient's back pressure and cannot move, the screw limiting clamping mechanism 4 is in a regional orientation. The horizontal threaded sleeve 51 is rotated in a directional manner, and the distance between the No. 2 external threaded rod 56 and the No. 3 external threaded rod 57 will change, thereby changing the distance between the clamped part of the bed sheet or mattress and the patient's ankle, thereby controlling the angle of the patient's knee joint after bending, and medical staff can adjust it according to the specific angle.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary device for joint replacement surgery, comprising an elastic textile sleeve (1) that can be put on the ankle, a traction rope (3) with one end fixed to the outer circumference of the elastic textile sleeve (1), and a first docking plate (2) installed at the other end of the traction rope (3), characterized in that: Also includes, A screw-limited clamping mechanism (4) is provided with a lower stepped clamping plate (41) and an upper stepped clamping plate (42) which can be clamped on the surface of a mattress, a No. 1 externally threaded rod (47) which is installed between the lower stepped clamping plate (41) and the upper stepped clamping plate (42) and can make the lower stepped clamping plate (41) and the upper stepped clamping plate (42) move relative to each other when rotating, and a No. 1 polygonal limiting rod (410) which can prevent the lower stepped clamping plate (41) and the upper stepped clamping plate (42) from rotating relative to each other; A screw-type length adjustment mechanism (5) is provided inside thereof, wherein a second externally threaded rod (56) and a third externally threaded rod (57) are fixedly connected to a first docking plate (2) and a first polygonal limiting rod (410), a horizontal threaded sleeve (51) is threadedly connected to the second externally threaded rod (56) and the third externally threaded rod (57) and can change the distance between the second externally threaded rod (56) and the third externally threaded rod (57) when rotating, and a second polygonal limiting rod (511) is inserted into the axis of the second externally threaded rod (56) and the third externally threaded rod (57) and can prevent the second externally threaded rod (56) and the third externally threaded rod (57) from rotating relative to each other.

2. The auxiliary device for joint replacement surgery according to claim 1, characterized in that: The screw rod limiting clamping mechanism (4) comprises a lower stepped clamping plate (41) and an upper stepped clamping plate (42), wherein the lower stepped clamping plate (41) and the upper stepped clamping plate (42) are both provided with a rack structure (43) on the clamping end faces, wherein the upper stepped clamping plate (42) is provided with a No. 1 rod body mounting hole (44), wherein the lower stepped clamping plate (41) is provided with an internal threaded hole (45) at a position corresponding to the No. 1 rod body mounting hole (44), wherein the lower stepped clamping plate (41) and the upper stepped clamping plate (42) are provided with corresponding polygonal limiting holes (46), wherein the upper stepped clamping plate (42) is provided with a No. 1 externally threaded rod (47) which can rotate in the No. 1 rod body mounting hole (44) via a bearing, wherein the No. 1 externally threaded rod (47) is rotatable. A hexagonal nut (48) is fixedly installed at one end of the threaded rod (47); the rod body of the other end of the No. 1 external threaded rod (47) passes through the internal threaded hole (45) and is installed in the internal threaded hole (45) through the No. 1 internal threaded structure (412); a limiting head (49) is fixedly installed at the end of the No. 1 external threaded rod (47) located near the internal threaded hole (45); a No. 1 polygonal limiting rod (410) is installed in the polygonal limiting hole (46) of the lower stepped clamping plate (41) and the upper stepped clamping plate (42); a limiting head (49) is fixedly installed at both ends of the No. 1 polygonal limiting rod (410), and a No. 2 docking plate (411) with an integrated structure is provided in the middle of the rod body of the No. 1 polygonal limiting rod (410).

3. The auxiliary device for joint replacement surgery according to claim 2, characterized in that: The No. 1 internal thread structure (412) comprises an internal thread structure arranged in the internal thread hole (45) and an external thread structure arranged on the rod body of the No. 1 external thread rod (47), and the internal thread structure matches the external thread structure.

4. The auxiliary device for joint replacement surgery according to claim 3, characterized in that: The structural shape of the cross section of the polygonal limiting hole (46) is consistent with the structural shape of the cross section of the first polygonal limiting rod (410), both of which are polygonal structures, and the structural dimensions of the cross section of the polygonal limiting hole (46) match the structural dimensions of the cross section of the first polygonal limiting rod (410).

5. The auxiliary device for joint replacement surgery according to claim 4, characterized in that: The screw-type length adjustment mechanism (5) comprises a horizontal threaded sleeve (51), a No. 2 external threaded rod (56) and a No. 3 external threaded rod (57); one end of the horizontal threaded sleeve (51) is provided with a No. 1 internal threaded cavity (52) with an inner concave structure; the other end of the horizontal threaded sleeve (51) is provided with a No. 2 internal threaded cavity (53) with an inner concave structure; the rod body of the No. 2 external threaded rod (56) is installed inside the No. 1 internal threaded cavity (52) via a No. 2 threaded structure (54); the rod body of the No. 3 external threaded rod (57) is installed inside the No. 2 internal threaded cavity (53) via a No. 3 threaded structure (55); The second external threaded rod (56) and the third external threaded rod (57) are provided with a polygonal limiting cavity (510) with an inner concave structure at the opposite ends, and a second polygonal limiting rod (511) inserted into the polygonal limiting cavity (510) is fixedly installed at the center of the horizontal threaded sleeve (51), and one end of the second external threaded rod (56) is provided with a first connecting plate (58) which is an integral structure with it and fixedly connected to the corresponding end face of the first docking plate (2), and one end of the third external threaded rod (57) is provided with a second connecting plate (59) which is an integral structure with it and fixedly connected to the corresponding end face of the second docking plate (411).

6. The auxiliary device for joint replacement surgery according to claim 5, characterized in that: The structural shape of the cross section of the polygonal limiting cavity (510) is consistent with the structural shape of the cross section of the second polygonal limiting rod (511), both of which are polygonal structures, and the structural dimensions of the cross section of the polygonal limiting cavity (510) match the structural dimensions of the cross section of the second polygonal limiting rod (511).

7. The auxiliary device for joint replacement surgery according to claim 6, characterized in that: The No. 2 thread structure (54) includes an internal thread structure arranged inside the No. 1 internal thread cavity (52) and an external thread structure arranged on the rod body of the No. 2 external thread rod (56); the No. 3 thread structure (55) includes an internal thread structure arranged inside the No. 2 internal thread cavity (53) and an external thread structure arranged on the rod body of the No. 3 external thread rod (57); and the spiral direction of the No. 2 thread structure (54) is opposite to the spiral direction of the No. 3 thread structure (55).

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