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SA Orthopaedic Journal

On-line version ISSN 2309-8309
Print version ISSN 1681-150X


GORDON, Jonathan F; SLOPER, Philip JH; MELTON, Joel TK  and  CROSS, Mervyn J. The lift-off sign: further observations on the Lachman test for diagnosis of anterior cruciate ligament rupture. SA orthop. j. [online]. 2012, vol.11, n.2, pp.65-67. ISSN 2309-8309.

The Lachman test is a commonly used clinical test for evaluating anterior cruciate ligament (ACL) integrity. When performing the Lachman test we have noted an additional, previously unreported finding, which helps to discriminate between the intact and ruptured ACL. This observation, which we have named the lift-off sign, can be explained using the different classes of lever system operating in each case.

Keywords : ACL; knee; knee injuries; Lachman.

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