Assesses for posterior cruciate ligament (PCL) instability.

Performing the Test

  1. Observe for posterior sag sign and compare knees
  2. Patient supine, hip flexed to 45°, knee flexed to 90°, with foot flat and stabilized
  3. Grasp knee with both hands just distal to patella, with thumbs on joint line
  4. Push tibia backward on femur (in direction of joint line and not directly towards patient's body), ensure hamstrings are relaxed and appreciate end feel, compare both knees
  5. Positive: abnormal posterior displacement of tibia
  6. Sensitivity: 90%, Specificity: 99%
  7. LR+ = 90, LR- = .10


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