What mechanical test is specifically used for evaluating the LCL injury?

The varus stress test is specifically designed to evaluate injuries to the lateral collateral ligament (LCL) of the knee. This test involves applying a force to the knee joint while stabilizing the ankle, which helps assess the integrity and stability of the LCL. By pushing inward on the knee with the leg in a slightly bent position, a practitioner can determine if there is any laxity or instability in the LCL, indicating a possible injury.

In contrast, the Thompson test is utilized to assess the integrity of the Achilles tendon, Finkelstein's test is used for diagnosing De Quervain's tenosynovitis in the wrist, and Neer's test evaluates impingement of the shoulder. Each of these tests targets different structures and injuries, making them unsuitable for assessing lateral collateral ligament issues.