What does Lachman's Test evaluate?

Lachman's Test is a specific clinical test used to evaluate the integrity of the anterior cruciate ligament (ACL) in the knee. Its primary purpose is to assess the stability of the knee joint during a stress maneuver. In this test, the examiner stabilizes the femur with one hand while pulling the tibia forward with the other hand. A significant amount of anterior translation of the tibia relative to the femur indicates a positive test, suggesting an ACL tear or injury.

While the option indicating pain during a pivot shift test does relate to ACL stability and injuries, the Lachman's Test itself does not specifically assess pain during rotation but rather assesses knee stability and the function of the ACL directly. The other options presented in the question do not align with the focus of Lachman's Test, which is specifically directed at assessing ligament integrity rather than joint range of motion, swelling, or other joint stability tests like the pivot shift.