Lachman's Test indicates injury to which ligament?

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Study for the NATA BOC Domain 2 Clinical Evaluation and Diagnosis Test. Utilize our comprehensive flashcards and multiple-choice quiz features; each question comes with hints and thorough explanations. Prepare effectively for your certification exam!

Multiple Choice

Lachman's Test indicates injury to which ligament?

Explanation:
The Lachman test specifically checks the ACL because the ACL is the primary restraint to forward (anterior) movement of the tibia relative to the femur. In this test, the knee is bent to about 20–30 degrees, the examiner stabilizes the femur with one hand, and the other hand pulls the tibia forward. If the ACL is intact, the tibia doesn’t translate much and you feel a firm end point. If the ACL is injured, there is excessive anterior translation of the tibia and often a soft or absent end feel, indicating ACL rupture. This test is especially reliable in acute injuries, when swelling or hamstring guarding can mask other signs, making Lachman more sensitive than other tests.

The Lachman test specifically checks the ACL because the ACL is the primary restraint to forward (anterior) movement of the tibia relative to the femur. In this test, the knee is bent to about 20–30 degrees, the examiner stabilizes the femur with one hand, and the other hand pulls the tibia forward. If the ACL is intact, the tibia doesn’t translate much and you feel a firm end point. If the ACL is injured, there is excessive anterior translation of the tibia and often a soft or absent end feel, indicating ACL rupture. This test is especially reliable in acute injuries, when swelling or hamstring guarding can mask other signs, making Lachman more sensitive than other tests.

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