Highgenboten C L, Jackson A W, Jansson K A, Meske N B
Orthopaedic Consultants, Dallas, TX 75230.
Am J Sports Med. 1992 Jul-Aug;20(4):450-4. doi: 10.1177/036354659202000415.
A recent published report indicated that the reliability and validity of anterior laxity measurements obtained by using the KT-1000 arthrometer were questionable. The purpose of our study was to examine the diagnostic validity of anterior laxity measurements testing patients in conscious and unconscious states using the KT-1000 arthrometer at 15, 20, and 30 pounds of force. The sample included 68 patients with confirmed anterior cruciate ligament disruption. They were given anterior-posterior drawer tests at 20 degrees in both unconscious and conscious states; measurements were recorded at 15, 20, and 30 pounds of force. The results indicated that the measurements in the unconscious state were significantly higher (P less than 0.01) than the values obtained in the conscious state. The anterior cruciate ligament-disrupted knees produced significantly higher (P less than 0.01) anterior laxity. The difference between anterior cruciate ligament-disrupted knees and normal knees grew significantly larger (P less than 0.01) as force increased. More patients demonstrated a difference greater than 2 mm between anterior cruciate ligament-disrupted knees and normal knees at 30 pounds (81% to 83%) than at 20 pounds (64% to 72%) of force. Seventy-nine percent of the patients demonstrated a compliance index difference greater than 1 mm using 15 and 30 pounds between the normal and anterior cruciate ligament-disrupted knee. These data provide statistical validity for the compliance index and support for the use of anterior laxity measurements at 30 pounds of force. However, approximately 20% of these patients did not demonstrate an anterior cruciate ligament-disrupted-normal knee difference greater than 2 mm or a compliance index difference of greater than 1 mm.
最近发表的一份报告指出，使用KT-1000关节动度计获得的前向松弛度测量结果的可靠性和有效性值得怀疑。我们研究的目的是在15、20和30磅力的情况下，使用KT-1000关节动度计检测清醒和昏迷状态下患者的前向松弛度测量的诊断有效性。样本包括68例确诊为前交叉韧带断裂的患者。在清醒和昏迷状态下，均对他们进行了20度的前后抽屉试验；记录了15、20和30磅力时的测量结果。结果表明，昏迷状态下的测量值显著高于（P<0.01）清醒状态下获得的值。前交叉韧带断裂的膝关节产生的前向松弛度显著更高（P<0.01）。随着力的增加，前交叉韧带断裂的膝关节与正常膝关节之间的差异显著增大（P<0.01）。与20磅力（64%至72%）相比，更多患者在30磅力（81%至83%）时，前交叉韧带断裂的膝关节与正常膝关节之间的差异大于2毫米。79%的患者在正常膝关节与前交叉韧带断裂的膝关节之间使用15和30磅力时，顺应性指数差异大于1毫米。这些数据为顺应性指数提供了统计学有效性，并支持在30磅力时使用前向松弛度测量。然而，这些患者中约20%未表现出前交叉韧带断裂的膝关节与正常膝关节之间的差异大于2毫米或顺应性指数差异大于1毫米。
