Lachman's test

One hand secures and stabilizes the distal femur while the other firmly grasps the proximal tibia. The knee is flexed to 30 degrees. A gentle anterior translation force is applied to the proximal tibia, stressing the ACL.  Grade the motion based on the amount of anterior translation :-

• Normal laxity is 0
• Grade 1: Less than 0.5 cm of translation
• Grade 2: 0.5-1.0 cm of translation
• Grade 3: 1.0-1.5 cm of translation

The examiner assesses for a firm/solid or soft endpoint.

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