An in-vivo study of ACL strain in the normal knee during Lachman and Drawer tests

Proceedings of the 1988 Fourteenth Annual Northeast Bioengineering Conference Pub Date : 1988-03-10 DOI:10.1109/NEBC.1988.19332

A. Erickson, B. Beynnon, C. Werthiemer, B. Fleming, M. Pope, R. Johnson, J. Howe, C. Nichols

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引用次数: 3

Abstract

To diagnose an anterior cruciate ligament (ACL) injury, clinicians perform a Lachman test at 30 degrees of flexion or a Drawer test at 90 degrees of flexion to record how far the tibia displaces anteriorly with respect to the femur. A study was undertaken to characterize the normal strain pattern of the ACL in vivo during the Lachman and Drawer tests, and to determine if there is a significant difference between the strain patterns at clinically applied load levels. Five patients were studied. After routine arthroscopic surgery a Hall-effect displacement transducer was attached arthroscopically to the ACL to measure strain. Loads were applied by a hand-held load cell in a transverse plane directed through the midtibial tuberosity at flexion angles of 90 degrees and 30 degrees . The difference in percentage strain between the Lachman and Drawer tests was highly significant at p<0.01 level. These results clearly show that the Lachman test produces a greater elongation or strain in the ACL in comparison to the Drawer test at loads to 35 lb. From these data the authors characterize the normal ACL strain pattern.<>

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Lachman和Drawer试验中正常膝关节前交叉韧带拉伤的体内研究

为了诊断前交叉韧带(ACL)损伤，临床医生在30度屈曲时进行拉赫曼试验或在90度屈曲时进行抽屉试验，记录胫骨相对于股骨的前移位程度。在Lachman和Drawer试验期间，进行了一项研究，以表征前交叉韧带在体内的正常应变模式，并确定在临床应用负荷水平下的应变模式之间是否存在显着差异。对5例患者进行了研究。常规关节镜手术后，在关节镜下将霍尔效应位移传感器连接到前交叉韧带以测量应变。在90度和30度的屈曲角下，通过胫骨中粗隆在横向平面上通过手持式称重传感器施加载荷。Lachman试验和Drawer试验的百分比应变差异在p>时非常显著

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the 1988 Fourteenth Annual Northeast Bioengineering Conference

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