Execution:
- Patient lies on the unaffected side with the hip and knee slightly flexed for stability. The pelvis is rotated approximately 30° posteriorly. The ankle of the affected leg rests on the examination table. The involved knee is flexed to 10°. In case of a torn ACL, the tibia will internally rotate and subluxate anteriorly due to the pull of gravity
- The examiner places one hand above and the other below the knee and applies a valgus force while the knee is brought into flexion
Positive Outcome: The tibia will suddenly reduce at around 40° of knee flexion
| Study | Reliability | Sn | Sp | LR+ | LR- |
| Slocum (1976) | NA | NA | NA | NA | NA |
