Abstract
Twenty-one cases with normal knees and twenty-one cases who had chronic anterior cruciate ligament deficiency were tested by three devices, a Telos stress machine, a KT-1000 arthrometer, and a CA4000 knee motion analyzer, in order to compare the results of quantitative laxity measurements with them. The diagnostic accuracy for anterior cruciate ligament deficiency was 62% with the Telos, 71% with the KT-1000, and 86% with the CA4000. Thus the CA4000 showed the highest sensitivity, but in actual clinical practice is impractical because of its complicated set-up procedure. The KT-1000 is more useful as it has both a high diagnostic sensitivity and a simple test procedure.
