Which one of the following tests will you adopt while examining a knee joint where you suspect an old tear of anterior cruciate ligament?
1.Posterior drawer test
2.Mc murray test
3.Lachman test
4.Pivot shift test
Explanation
Lachman’s test is the most sensitive test for anterior cruciate ligament tears. It is done with the knee. flexed at 20 degrees. So it can be done in acute as well as chronic injuries. (because in acute cases with hemarthrosis more flexion is usually not possible so performing anterior drawer test is difficult)