What special test is likely to be positive for a skier with an ACL injury due to a rotational mechanism?

• A. McMurray's Test
• B. Lachman's Test
• C. Slocum's Test
• D. Drawer Test

Answer: (C)

In the context of an ACL injury resulting from a rotational mechanism, Slocum's Test is particularly relevant as it assesses the integrity and function of the ACL under conditions that simulate the rotational forces typically involved in such injuries. This test involves applying a rotational force to the knee while it is in a specific position, which can help to identify instability caused by ACL damage.

The ACL is critical for providing stability during dynamic movements, especially those involving rotation of the tibia relative to the femur. Therefore, if an athlete experiences an ACL injury during a rotational maneuver, Slocum's Test is likely to yield a positive result, indicating instability linked to the ACL tear.

While other tests like Lachman's Test, McMurray's Test, and the Drawer Test are valuable for assessing knee stability and evaluating meniscal and ligament injuries, they may not specifically highlight the impact of rotational forces on the knee's stability in the same manner as Slocum's Test. Lachman's Test is more focused on an anterior translation assessment, while the Drawer Test assesses anterior-posterior stability. McMurray's Test is utilized mainly to evaluate meniscal tears and is not designed for detecting ACL injuries from a rotational perspective. Thus, Slocum's Test is