INSTRUMENTED MEASUREMENT OF ANTERIOR LAXITY OF THE KNEE
INSTRUMENTED MEASUREMENT OF ANTERIOR LAXITY OF THE KNEE
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DOI：
10.2106/00004623-198567050-00006
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发表时间：
1985-01-01
影响因子：
5.3
通讯作者：
BURKS, R
中科院分区：
文献类型：
--
作者：
DANIEL, DM;MALCOM, LL;BURKS, R
对33例尸体标本、338例正常人和89例单侧前交叉韧带断裂患者的膝关节前后松弛度进行了仪器测量。测试仪器是Medmetric膝关节测量仪，型号KT-2000。测量由89 N（20 lb）的前后载荷产生的总前后松弛度和前部顺应性指数。总前后松弛度由前向位移和后向位移组成;从测试参考位置测量，定义为施加然后释放89 N后向载荷后膝关节的静止位置。前向顺应性指数定义为前向载荷67 N和1/89 N之间的前向位移。所有测试都是在膝盖保持在大腿支撑上的情况下进行的，大腿支撑将膝盖置于20 °。.+-. 5弯曲。在89 N时，一组正常受试者的平均前向位移为5.7 mm，一组前交叉韧带断裂患者的平均前向位移为13.0 mm。在正常受试者中，92%的左膝-右膝前移位差异不超过2 mm，而在单侧前交叉韧带断裂的患者中，96%的损伤膝-正常膝前移位差异超过2 mm。在正常受试者中，93%的左右顺应性指数差异不超过0.5 mm，单侧前交叉韧带断裂患者85%的损伤侧与健侧的顺应性指数差异大于0.5mm。
Instrumented measurement of anterior-posterior laxity of the knee was measured in 33 cadaver specimens, 338 normal subjects, and 89 patients with unilateral disruption of the anterior cruciate ligament. The test instrument was the Medmetric knee arthrometer, model KT-2000. Total anterior-posterior laxity, produced by anterior and posterior loads of 89 N (20 lb), and the anterior compliance index were measured. The total anterior-posterior laxity is composed of an anterior displacement and a posterior displacement; these are measured from a testing reference position, defined as the resting position of the knee after applying and then releasing a posterior load of 89 N. The anterior compliance index is defined as the anterior displacement between an anterior load of 67 N and 1 of 89 N. All tests were performed with the knee held on a thigh support that placed the knee in 20.degree. .+-. 5 of flexion. The mean anterior displacement at 89 N was 5.7 mm in a group of normal subjects and 13.0 mm in a group of patients with a disrupted anterior cruciate ligament. Of the normal subjects 92% had a left knee-right knee difference in anterior displacement of no more than 2 mm, while 96% of the patients with a unilateral disruption of the anterior cruciate ligament had an injured knee-normal knee difference in anterior displacement of more than 2 mm. Of the normal subjects, 93% had a difference in the left-right compliance index of no more than 0.5 mm, and 85% of the patients with unilateral disruption of the anterior cruciate ligament had a difference in the compliance index of the injured and normal sides of more than 0.5 mm.