Daniel D M, Stone M L, Sachs R, Malcom L
Am J Sports Med. 1985 Nov-Dec;13(6):401-7. doi: 10.1177/036354658501300607.
Instrumented anterior/posterior laxity measurements were performed on 138 patients evaluated within 2 weeks of injury with their first traumatic knee hemarthrosis. All patients were tested with the MEDmetric Arthrometer model KT-1000 in a knee injury clinic. Seventy-five of the patients had knee arthroscopy. Thirty-three had arthrometer laxity tests under anesthesia. Eighty-seven percent of patients arthroscoped had anterior cruciate ligament (ACL) tears and 41% had meniscus tears. One hundred twenty normal subjects were tested to establish normal anterior laxity values. Three tests were used to evaluate anterior laxity: anterior displacement between a 15 and 20 pound force (compliance index), anterior displacement with a 20 pound force, and anterior displacement with a high manually applied force. Displacement measurements in normal subjects revealed a wide range of normal laxity with a small right knee-left knee difference. For example, the 20 pound anterior displacement range was 3 to 13.5 mm with a right knee-left knee difference (mean +/- SD, 0.8 +/- 0.7 mm). Eighty-eight percent of the normals had a right-left difference of less than 2 mm. In the 53 patients arthroscoped who had complete ACL tears, the anterior laxity measurements performed in the clinic were suggestive or diagnostic of pathologic anterior laxity in 50 patients.
对138例在首次创伤性膝关节积血损伤后2周内接受评估的患者进行了仪器化前后松弛度测量。所有患者均在膝关节损伤诊所使用MEDmetric关节测量仪KT - 1000进行测试。其中75例患者接受了膝关节镜检查。33例在麻醉下进行了关节测量仪松弛度测试。接受关节镜检查的患者中，87%存在前交叉韧带（ACL）撕裂，41%存在半月板撕裂。对120名正常受试者进行测试以确定正常的前松弛度值。使用三项测试来评估前松弛度：15至20磅力之间的前移位（顺应性指数）、20磅力时的前移位以及手动施加高力时的前移位。正常受试者的移位测量显示正常松弛度范围较宽，右膝与左膝差异较小。例如，20磅力时的前移位范围为3至13.5毫米，右膝与左膝差异（均值±标准差，0.8±0.7毫米）。88%的正常受试者左右差异小于2毫米。在53例接受关节镜检查且存在完全ACL撕裂的患者中，诊所进行的前松弛度测量提示或诊断出50例患者存在病理性前松弛度。
