Development of a New Diagnostic Test Kit for Knee Ligament Injury and an Evaluation of its Efficacy

This study aims to develop a new knee ligament displacement tester which is capable of collaterally reproducing 30° and 90° knee flexion while testing the knee ligament displacement and to investigate its efficacy. The SSY (new knee ligament displacement tester) device was manufactured and clinically applied as described in the following sections. While the Telos device yielded a standard deviation of ±9.76° and ±5.92° at 30° and 90° of knee flexion (respectively) in ACL (Anterior Cruciate Ligament) and PCL (Posterior Cruciate Ligament) laxity testing, the SSY device yielded results of ±3.20° and ±2.75°, indicating improvements of 60% and 54%, respectively. It is thus considered useful as a new supplementary device for the measurement of knee joint laxity.