Reverse Lachman Test

The Reverse Lachman Test is used to assess the integrity of the posterior cruciate ligament in the knee. It helps diagnose PCL tears by evaluating the posterior translation of the tibia relative to the femur when the knee is slightly flexed.

The Reverse Lachman Test assesses the PCL, while the standard Lachman Test primarily evaluates the anterior cruciate ligament. The positioning and direction of force applied during the tests differ to target these specific ligaments.

A positive Reverse Lachman Test indicates a potential tear in the posterior cruciate ligament. This is identified by a soft or absent end feel and increased posterior translation of the tibia compared to the unaffected side.