Rotary osteotomy bone cutting device and application thereof

Abstract

The invention relates to a rotary osteotomy device. The rotary osteotomy device comprises a steel needle positioner and a protractor, wherein a steel needle positioning column is arranged on the front end of the steel needle positioner, a steel needle tunnel is formed in the middle of the steel needle positioning column, a cross rod is arranged on the tail end of a handle of the steel needle positioner, a sawtooth-shaped groove is formed in the cross rod, the protractor is in a T shape and is provided with a scale, a fixed handle and a movable handle, the scale is in an arc shape, and the lower end of the movable handle is connected with the bottom of the fixed handle through a rotating shaft. According to the rotary osteotomy device, by using the steel needle positioner, two kirschner wires can be vertically drove into bones, and good parallelism is kept; a through hole is formed in the fixed handle of the protractor, so that the kirschner wires can be sleeved; a rotation angle can be quickly and accurately read by swinging the movable handle; the orthomorphia accuracy is obviously increased, the orthomorphia time is shortened, hemorrhage during orthomorphia is reduced, and orthomorphia wounds are reduced.

Description

technical field [0001] The invention relates to a medical device, in particular to a rotary osteotomy device and its application. Background technique [0002] Rotational osteotomy is a commonly used orthopedic procedure in orthopedic surgery, but its method and accuracy are debated. Clinically, there are three methods: engraving method, visual method and Kirschner wire method. [0003] The scoring method is to make a scoring line on the surface of the proximal fracture of the femur, and then calculate the arc that should be rotated based on the diameter of the femur. Because the bone is not a right cylinder, the angles corresponding to the curvature of different parts are different, so the scoring method is often not accurate. There are large errors. The visual method is to determine the angle after derotation according to the previous experience and the joint movement and lower limb force line after osteotomy. This method is highly subjective and should not be popularize...

AI Technical Summary

Problems solved by technology

This method is restricted by the triangular protractor, and cannot accurately complete the preoperative osteotomy plan. If the osteotomy angle is changed during the operation, the original triangular protractor cannot be used; in addition, the insertion of parallel Kirschner wires requires the operator’s operation. High, it may be necessary to insert the Kirschner wire repeatedly, resulting in adverse consequences such as prolonged operation time, increased bleeding, and increased trauma. corrected rotation angle

About the instrument that can measure the rotation angle of osteotomy conveniently and accurately, there is no report yet

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