Muneta T, Ezura Y, Sekiya I, Yamamoto H
Department of Orthopaedic Surgery, Tokyo Medical and Dental University, Japan.
Am J Sports Med. 1996 Sep-Oct;24(5):603-7. doi: 10.1177/036354659602400507.
This study was performed to examine the relationship between knee extension loss and the length of time after injury. We also wanted to compare anterior laxity in anterior cruciate ligament-injured knees in the early and late stages of injury. Loss of knee extension was measured in 81 patients with anterior cruciate ligament injury using lateral radiography with the injured leg relaxed and elevated. Extension loss was defined as the difference in maximal extension angle between the injured and uninjured knees. Average loss of extension was 3.6 degrees in the 17 knees in which the anterior cruciate ligament had been torn 3 weeks or less before examination (the acute injury group) and 0.6 degree in the 64 knees in which the anterior cruciate ligament had been torn more than 3 weeks before examination (the chronic injury group). The extension loss in the acutely injured knees was significantly greater compared with that in the uninjured knees and in the chronically injured knees. Arthrometric measurements using the KT-1000 arthrometer were reliable to diagnose an acute tear. There was no correlation between the degree of extension loss and arthrometric anterior knee laxity measurements. In 12 patients, the initial extension deficit in the early stage of injury significantly resolved with time, and manual maximum arthrometric measurements of anterior knee laxity improved spontaneously with time.
本研究旨在探讨膝关节伸展受限与损伤后时间长短之间的关系。我们还希望比较前交叉韧带损伤膝关节在损伤早期和晚期的前向松弛情况。对81例前交叉韧带损伤患者，在其伤腿放松并抬高的情况下，通过侧位X线片测量膝关节伸展受限情况。伸展受限定义为患侧膝关节与健侧膝关节最大伸展角度的差值。在检查前3周或更短时间前交叉韧带已撕裂的17例膝关节（急性损伤组）中，平均伸展受限为3.6度；在检查前3周以上前交叉韧带已撕裂的64例膝关节（慢性损伤组）中，平均伸展受限为0.6度。与健侧膝关节和慢性损伤膝关节相比，急性损伤膝关节的伸展受限明显更大。使用KT - 1000关节测量仪进行的关节测量对诊断急性撕裂是可靠 的。伸展受限程度与关节测量的膝关节前向松弛测量结果之间无相关性。在12例患者中，损伤早期的初始伸展缺陷随时间显著改善，膝关节前向松弛的手动最大关节测量值也随时间自发改善。
