2020 Volume 11 Issue 2 Pages 93-99
ABSTRACT Objective: This study aimed to evaluate the posterior cruciate ligament for posterior knee instability in injured knees using ultrasound. Methods: The reliability of measurement using an ultrasound gel pad and self-made instrument for both healthy knees was verified using a custom-made device. In the supine and standing positions, the knee was maintained at 90° flexion, and the femur-tibiastep-off was calculated; the side-to-side-difference served as an index． Results: The intraclass correlation coefficient the average value of 3 measurements was high among and between the examiners．According to the Bland-Altman analysis, the minimum detectable change was <1 mm, and the standard error was low among and between the examiners. The average value of the side-to-side-difference of the femur-tibia-step-off was 0.11 ± 0.52 mm. Conclusion: The femur-tibia-step-off can be determined with relative and absolute reliability for an average of 3 measurements obtained using ultrasound. ultrasound is useful for the evaluation of posterior knee instability.
