Angle measurement device and method for tibial osteotomy in total knee replacement

Abstract

The invention discloses an angle measurement device and method for tibial osteotomy in total knee replacement, and belongs to the field of medical apparatus systems. The angle measurement device comprises a positioning tool positioning a lower extremity force line of a patient, an osteotomy tool, an angle measurement part measuring the front inclination angle and the back inclination angle of tibial osteotomy in total knee replacement and a computer system; the positioning tool comprises three rigid rods, and the three rigid rods are the first rod, the second rod and the third rod in sequence;the angle measurement part comprises a motion sensor, a processor for processing motion-sensor data and a wireless information transmission part. By means of the angle measurement device and method for tibial osteotomy in total knee replacement, a front inclination angle value and a back inclination angle value of tibial osteotomy can be accurately computed, and are visually displayed on a display to assist doctors in tibial osteotomy; the previous measurement randomness and conditions of relying on surgeon experiences are reduced, the measurement reliability is improved, and surgery efficiency is also improved.

Description

technical field [0001] The invention relates to the field of medical instrument systems, in particular to an angle measuring device and method for tibial osteotomy in total knee arthroplasty. Background technique [0002] Traditional total knee arthroplasty is very complicated. In pathological conditions, due to the varus / valgus of the knee joint, the normal tibial angle changes, resulting in a shift in the line of force of the lower extremity. This is exactly what the preoperative plan for knee arthroplasty is. And problems that need to be solved by measurement and osteotomy during surgery. Only by calculating and measuring the accurate osteotomy angle can the lower extremity line of force be correctly reconstructed. Reconstructing a good alignment of the lower limbs has always been one of the main purposes of total knee arthroplasty. The postoperative satisfaction of patients with total knee arthroplasty and the service life of the prosthesis largely depend on a good alig...

AI Technical Summary

Problems solved by technology

The error is relatively large, the accuracy depends on the doctor's experience, and there are many and complicated instruments used

[0004] Patent CN206333970U discloses a knee joint tibial osteotomy positioning guide plate device, although it is more accurate than using some simple knee joint tibial osteotomy positioning guide plate devices to determine the angle of tibial osteotomy in the past, but the ankle clip is used to control varus and varus The error of the back tilt angle is relatively large, which cannot meet the precise requirements of osteotomy increasingly, and will definitely affect the curative effect of knee replacement

And generally rely on visual estimation to estimate the positioning force line and angle, if the operation is not accurate, it may lead to unstable positioning, cannot accurately control internal and external varus, internal and external rotation, and tibial anteroposterior tilt, and the operation is more complicated

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