Device capable of adjusting internal and external rotation and internal and external turning angles of thighbone
By designing a device including support base, positioning sleeve, rotating rod and angle adjustment device, the problem of inaccurate internal and external rotation and internal and external valgus angle positioning in the medial patella ligament reconstruction is solved, and the precise adjustment of the femoral angle is achieved and the improvement of surgical success rate.
Patent Information
- Application Number
- CN202420666513.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-04-02
AI Technical Summary
In reconstruction of the medial patella ligament, the inaccurate positioning of the internal and external rotation of the femur and the inaccurate positioning of the internal and external valgus angles leads to the failure of the surgery, and it is difficult for the prior art to accurately adjust these angles.
A device including a support base, a positioning sleeve, a rotating rod and an angle adjustment device is designed to accurately adjust the internal and external rotation and internal and external valgus angle of the femur through a servo electric cylinder and an arc-shaped clamping block.
This device can accurately adjust the internal and external rotation and internal and external valgus angle of the femur, improve the accuracy of femoral end point positioning during the reconstruction of the medial patella of patella, and thus improve the success rate of the surgery.
Smart Images
Figure CN222467118U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a device capable of adjusting the internal and external rotation and internal and external valgus angles of a femur. Background Art
[0002] During medial patellar ligament reconstruction surgery, the femoral attachment of the ligament needs to be positioned. Studies have found that the incidence of inaccurate positioning is very high. Inaccurate positioning may lead to joint stiffness and instability, early arthritis, ligament rupture, and even surgical failure. It has been reached a consensus that accurate positioning of the femoral attachment of the medial patellar ligament can best restore normal movement of the knee joint.
[0003] Some knee ligament reconstruction surgeries require correct positioning on the femur, which is usually performed through pure lateral X-rays of the femur. When the femur is in internal and external rotation or valgus during X-rays, inaccurate positioning may result, which may lead to surgical failure. In order to study the effects of internal and external rotation and valgus on intraoperative positioning, a device is needed to accurately adjust the angle of internal and external rotation and valgus of the femur. Utility Model Content
[0004] In response to the defects in the prior art, the utility model provides a device that can adjust the angles of femoral internal and external rotation and internal and external varus. By accurately adjusting the angles of femoral internal and external rotation and internal and external varus, it is convenient to explore the influence of femoral internal and external rotation and internal and external varus on the accuracy of femoral attachment point positioning during medial patellar ligament reconstruction, which is conducive to improving the success rate of the operation.
[0005] The utility model proposes a device capable of adjusting the internal and external rotation and internal and external valgus angles of the femur, comprising a support base, the lower surface of the support base is fixedly connected with a symmetrically distributed anti-skid pad, the upper surface of the support base is fixedly connected with a positioning sleeve, the inner wall of the positioning sleeve is installed with a rotating rod through a bearing, the outer surface of the rotating rod is fixedly connected with a first pointer, the outer surface of the positioning sleeve is provided with a first threaded hole, the inner wall of the first threaded hole is threadedly connected with a first hand-tightening bolt, and one end of the first hand-tightening bolt is in contact with the outer surface of the rotating rod;
[0006] The outer surface of the positioning sleeve is provided with an angle adjustment device, and the angle adjustment device comprises an annular scale plate, and the inner wall of the annular scale plate is fixedly sleeved with the outer surface of the positioning sleeve.
[0007] Preferably, the lower surface of the first pointer contacts the upper surface of the annular scale plate, and one end of the rotating rod is fixedly connected to an annular fixing block.
[0008] Preferably, the front side of the annular fixing block is provided with scale grooves distributed in an annular array, and the inner wall of the annular fixing block is provided with a rotating ring via a bearing.
[0009] Preferably, symmetrically distributed servo electric cylinders are fixedly mounted on the inner wall of the rotating ring, and one end of the piston rod of the servo electric cylinder is fixedly connected to an arc-shaped clamping block.
[0010] Preferably, a driving rod is fixedly connected to the front surface of the rotating ring, and a second pointer is fixedly connected to the outer surface of the driving rod.
[0011] Preferably, a second threaded hole is formed on the front side of the second pointer, and a second hand-tightened bolt is threadedly connected to the inner wall of the second threaded hole.
[0012] Preferably, one end of the second hand-tightening bolt contacts the front surface of the annular fixing block.
[0013] The beneficial effects of the utility model are embodied in:
[0014] By setting up an angle adjustment device, the femur can be accurately adjusted in internal and external rotation and varus and valgus angles, and the femur can be fixed after internal and external rotation or varus and valgus, thereby facilitating the study of the effects of internal and external rotation and varus and valgus of the femur on the accuracy of femoral attachment point positioning during medial patellar ligament reconstruction surgery, which is beneficial to improving the success rate of the operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.
[0016] Figure 1 A front view of a device for adjusting the internal and external rotation and internal and external valgus angles of the femur provided by the utility model;
[0017] Figure 2 for Figure 1 A three-dimensional diagram of the structure of an annular fixing block of a device capable of adjusting the internal and external rotation and internal and external valgus angles of a femur;
[0018] Figure 3 for Figure 1 A partial stereoscopic view of a positioning sleeve structure of a device capable of adjusting the internal and external rotation and internal and external valgus angles of a femur;
[0019] Figure 4 for Figure 1 A stereoscopic view of a driving rod structure of a device capable of adjusting the internal and external rotation and internal and external valgus angles of a femur is shown.
[0020] In the accompanying drawings, 1. support base, 2. anti-slip pad, 3. positioning sleeve, 4. rotating rod, 5. first pointer, 6. first threaded hole, 7. first hand-tightening bolt, 8. annular dial, 81. annular fixing block, 82. scale groove, 83. rotating ring, 84. servo electric cylinder, 85. arc clamping block, 86. driving rod, 87. second pointer, 88. second threaded hole, 89. second hand-tightening bolt. DETAILED DESCRIPTION
[0021] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.
[0022] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.
[0023] Reference Figure 1-4 , a device capable of adjusting the internal and external rotation and internal and external valgus angles of a femur, comprising a support base 1, a lower surface of the support base 1 is fixedly connected with anti-skid pads 2 which are symmetrically distributed, the anti-skid pads 2 serve to improve the stability of the support base 1 when supporting, a positioning sleeve 3 is fixedly connected with the upper surface of the support base 1, a rotating rod 4 is installed on the inner wall of the positioning sleeve 3 through a bearing, a handle is arranged on the surface of the rotating rod 4, so as to facilitate driving the rotating rod 4 to rotate and adjust, a first pointer 5 is fixedly connected with the outer surface of the rotating rod 4, a first threaded hole 6 is opened on the outer surface of the positioning sleeve 3, a first hand-tightening bolt 7 is threadedly connected with the inner wall of the first threaded hole 6, and one end of the first hand-tightening bolt 7 contacts with the outer surface of the rotating rod 4;
[0024] The outer surface of the positioning sleeve 3 is provided with an angle adjustment device, and the angle adjustment device includes an annular scale plate 8 , and the inner wall of the annular scale plate 8 is fixedly sleeved with the outer surface of the positioning sleeve 3 .
[0025] The lower surface of the first pointer 5 contacts the upper surface of the annular dial 8. The annular dial 8 is used in conjunction with the first pointer 5 to accurately see the adjustment angle. One end of the rotating rod 4 is fixedly connected to an annular fixing block 81. The front of the annular fixing block 81 is provided with scale grooves 82 distributed in an annular array. The inner wall of the annular fixing block 81 is installed with a rotating ring 83 through a bearing. The bearing on the outer side of the rotating ring 83 can be replaced with a damping bearing according to usage requirements to avoid the effect of rotation caused by gravity. The inner wall of the rotating ring 83 is fixedly installed with symmetrically distributed servo electric cylinders 84, and one end of the piston rod of the servo electric cylinder 84 is fixedly connected to an arc-shaped clamping block 85.
[0026] A driving rod 86 is fixedly connected to the front of the rotating ring 83. The driving rod 86 serves to facilitate driving the rotating ring 83 to rotate and adjust. A second pointer 87 is fixedly connected to the outer surface of the driving rod 86. A second threaded hole 88 is provided on the front of the second pointer 87. A second hand-tightening bolt 89 is threadedly connected to the inner wall of the second threaded hole 88. One end of the second hand-tightening bolt 89 contacts the front of the annular fixing block 81. The rotation of the second hand-tightening bolt 89 causes one end of the second hand-tightening bolt 89 to be squeezed and contacted with the front of the annular fixing block 81, thereby realizing the positioning of the rotating ring 83 after rotation.
[0027] By setting up an angle adjustment device, the femur can be accurately adjusted in internal and external rotation and varus and valgus angles, and the femur can be fixed after internal and external rotation or varus and valgus, thereby facilitating the study of the effects of internal and external rotation and varus and valgus of the femur on the accuracy of femoral attachment point positioning during medial patellar ligament reconstruction surgery, which is beneficial to improving the success rate of the operation.
[0028] Working principle: Step 1, when adjusting the inside-out angle of the femur, first the piston rods of the two servo electric cylinders 84 extend, and the extension movement of the piston rods of the servo electric cylinders 84 fixes and clamps the femur through the arc clamping block 85, and makes it located at the center of the rotating ring 83, and then the handle on the rotating rod 4 is rotated to make it rotate stably through the cooperation between the rotating rod 4 and the bearing, so as to adjust the inside-out angle of the femur, and the rotation of the rotating rod 4 drives the first pointer 5 to rotate, and the inside-out angle is accurately adjusted through the cooperation of the annular dial 8. After the adjustment is completed, the first hand-tightening bolt 7 is rotated clockwise to squeeze one end of it against the outer surface of the rotating rod 4, so as to position the adjusted femur;
[0029] Step 2, when adjusting the internal and external rotation angle of the femur, first use the extension movement of the piston rod of the servo electric cylinder 84 to fix and clamp the femur through the arc clamping block 85, and make it located at the center of the rotating ring 83, and then drive the rotating ring 83 to rotate through the driving rod 86. The rotation of the rotating ring 83 adjusts the internal and external rotation angle of the clamped femur. At the same time, the rotation of the rotating ring 83 drives the second pointer 87 to rotate through the driving rod 86, so as to cooperate with the scale groove 82 for precise angle adjustment. After the adjustment is completed, the second hand-tightening bolt 89 is rotated clockwise so that one end of it is squeezed and contacted with the front of the annular fixing block 81, thereby facilitating the positioning of the adjusted femur.
[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.
Claims
1. A device capable of adjusting the internal and external rotation and internal and external valgus angles of a femur, comprising a support base (1), characterized in that: The lower surface of the support base (1) is fixedly connected with a symmetrically distributed anti-slip pad (2), the upper surface of the support base (1) is fixedly connected with a positioning sleeve (3), the inner wall of the positioning sleeve (3) is mounted with a rotating rod (4) through a bearing, the outer surface of the rotating rod (4) is fixedly connected with a first pointer (5), the outer surface of the positioning sleeve (3) is provided with a first threaded hole (6), the inner wall of the first threaded hole (6) is threadedly connected with a first hand-tightening bolt (7), and one end of the first hand-tightening bolt (7) is in contact with the outer surface of the rotating rod (4); The outer surface of the positioning sleeve (3) is provided with an angle adjustment device, and the angle adjustment device comprises an annular scale plate (8), and the inner wall of the annular scale plate (8) is fixedly sleeved with the outer surface of the positioning sleeve (3).
2. A device for adjusting the internal and external rotation and valgus angle of the femur according to claim 1, characterized in that: The lower surface of the first pointer (5) contacts the upper surface of the annular scale plate (8), and one end of the rotating rod (4) is fixedly connected to an annular fixing block (81).
3. A device for adjusting the internal and external rotation and internal and external valgus angles of the femur according to claim 2, characterized in that: The front side of the annular fixing block (81) is provided with scale grooves (82) distributed in an annular array, and the inner wall of the annular fixing block (81) is provided with a rotating ring (83) via a bearing.
4. A device for adjusting the internal and external rotation and internal and external valgus angles of the femur according to claim 3, characterized in that: The inner wall of the rotating ring (83) is fixedly mounted with symmetrically distributed servo electric cylinders (84), and one end of the piston rod of the servo electric cylinder (84) is fixedly connected with an arc-shaped clamping block (85).
5. The device for adjusting the internal and external rotation and valgus angle of the femur according to claim 3, characterized in that: A driving rod (86) is fixedly connected to the front surface of the rotating ring (83), and a second pointer (87) is fixedly connected to the outer surface of the driving rod (86).
6. A device for adjusting the internal and external rotation and valgus angle of the femur according to claim 5, characterized in that: A second threaded hole (88) is provided on the front side of the second pointer (87), and a second hand-tightened bolt (89) is threadedly connected to the inner wall of the second threaded hole (88).
7. A device for adjusting the internal and external rotation and valgus angle of the femur according to claim 6, characterized in that: One end of the second hand-tightening bolt (89) contacts the front surface of the annular fixing block (81).