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A kind of external rotation adjuster

An adjuster and external rotation technology, applied in the field of medical devices for total knee replacement surgery, can solve the problems of lack of adjustment tools, parallel lines and condylar lines cannot be accurately consistent, and achieve an easy-to-grasp effect

Active Publication Date: 2019-03-05
青岛山大齐鲁医院(山东大学齐鲁医院(青岛))
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome that when the parallel line of the line d calibrated by the calibration tool in the prior art is not parallel to the condylar line, there is no special adjustment tool for adjustment, which requires human eyes to estimate, resulting in The technical defect that the parallel line of the calibrated line d cannot be exactly consistent with the condylar line, so as to provide an external rotation adjuster that can accurately adjust the parallel line of the above line d, so that the calibrated line is parallel and consistent with the condylar line

Method used

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  • A kind of external rotation adjuster
  • A kind of external rotation adjuster
  • A kind of external rotation adjuster

Examples

Experimental program
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Effect test

Embodiment 1

[0046] This embodiment provides an external rotation adjuster, such as Figure 4 As shown, including a body 10, a pair of reference holes 1 and several pairs of adjustment holes 2, 3, 4, 5, 6, 7 are provided on the body 10, and the distance between the pairs of reference holes 1 is set so that it It is suitable for fitting and fitting on a pair of fixed nails to be adjusted; the reference hole 1 is a long hole, and its length extension direction is perpendicular to the direction of the center line of the pair of fixed nails; paired The distribution direction of the reference holes 1 is perpendicular to the length extension direction, and a pair of adjustment holes 2, 3, 4, 5, 6 with the smallest angular difference between the line connecting the center of the circle and the distribution direction of the pair of reference holes 1, 7. The angle difference between the line connecting the center of the circle and the distribution direction of the reference hole 1 is 2° at most; T...

Embodiment 2

[0054] This embodiment provides a method of using an external rotation adjuster, refer to Figure 4 shown, including the following steps:

[0055] S1 fit a pair of reference holes 1 on the body 10 onto a pair of fixing nails to be adjusted;

[0056] S2 Move the body 10 along the length extension direction of the reference hole 1 until a pair of angle marks 20 corresponding to a certain pair of adjustment holes 2, 3, 4, 5, 6, 7 are found and simultaneously aligned with the condylar line align both ends of

[0057] S3 Reset new fixing nails at the found positions of the pair of adjustment holes 2, 3, 4, 5, 6, 7.

[0058] The use method of the external rotation adjuster in this embodiment can adjust the setting position of the fixing nail when the connection line of the two fixing nails is not parallel to the condyle-passing line, so that the connection line of the fixing nails after adjustment and the condyle-passing line reach the same level. Better parallel.

[0059] When ...

Embodiment 3

[0064] This embodiment provides an external rotation adjuster, which is a deformation based on Embodiment 1, such as Figure 5 As shown, the difference is: it also includes an inclinometer structure, (the inclination angle structure does not set the angle mark 20 on the body 10, but resets the inclination angle structure), and the inclination angle structure is installed on the body 10 for Measure the angle difference between the line through the condyle and the line connecting the centers of the paired reference holes 1.

[0065] The tilt measuring structure includes: a first measuring rod 21, one end of which is rotatably mounted on the body 10, and the other end is a pointer. The number of angles is 11; the second measuring rod 22 is arranged parallel to the first measuring rod 21, and the distance between the first measuring rod 21 and the first measuring rod 21 can be adjusted by adjusting the structure, and has two opposite pointers.

[0066] When using a calibration to...

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Abstract

The invention provides an extorsion regulator and a use method thereof, wherein the regulator comprises a body, wherein at least one pair of reference holes and a plurality pairs of regulating holes are formed in the body; the reference holes are long strip-shaped holes; the length extending direction is vertical to the direction of a center connecting line of a pair of fixing nails; the distribution direction of the paired reference holes is vertical to the length extending direction; the pair of regulating holes with the smallest angle differences in the distribution direction of the paired reference holes are subjected to circle center line connection; the angle difference between the circle center connection line and the reference hole is 2 degrees to the maximum degree; the angle difference between the circle center connecting lines of any two pairs of regulating holes with the most similar inclination degree is 2 degrees to the maximum degree; a plurality of angle marks are arranged on the body; the angle marks are respectively positioned on the circle center connecting lines of the paired regulating holes. The regulator has the advantages that the front tangent plane and the back tangent plane can be effectively controlled to be parallel to the condyle line; the condition of improper extorsion bone cutting of the front and back thighbone condyles is avoided; the precise bone cutting is realized; the clinic curative effect is improved.

Description

technical field [0001] The invention relates to the technical field of medical instruments for total knee replacement surgery, in particular to an external rotation adjuster. Background technique [0002] With the continuous development and progress of medical technology, artificial knee replacement surgery has become one of the routine treatments for knee joint lesions. Artificial knee replacement is the use of artificial joint prosthesis to replace the damaged joint to restore and improve joint function and improve the quality of life. Due to the short course of artificial knee replacement and obvious pain relief effect, it is accepted by more and more doctors and patients. In artificial knee arthroplasty, an osteotomy of the distal femur is required to obtain a femoral model for the artificial joint prosthesis, such as figure 1 As shown, the distal end of the femur is firstly osteotomized to form a vertical section a, and then two flat section b perpendicular to the ver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/16A61B17/56
CPCA61B17/1657A61B17/1675A61B17/1732A61B2017/564
Inventor 张鹏孔杰杜建春万连平刘泽淼
Owner 青岛山大齐鲁医院(山东大学齐鲁医院(青岛))
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