Assesses for instability of the anterior cruciate ligament (ACL).
Performing the Test
Patient supine, knee relaxed in 15°-30° of flexion
Grasp distal femur with left hand, proximal tibia with right, ensuring left thumb is on joint line
Stabilizing femur, apply anterior pressure to posterior tibia
Positive: greater anterior tibial displacement on affected side compared to unaffected side
Compare both knees
Sensitivity: 87%; specificity: 60%
LR+ = 9.4; LR- = 0.23
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