Gravity Drawer Test (aka Posterior Sign)

Purpose:
To assess the integrity of the posterior cruciate ligament

Procedure:

• Patient is supine,
  • their hips flexed to 45 degrees and
  • their knees flexed to 90 degrees and
  • their feet are flat on the table
• Observe the profile of both knees from the side of the table

Positive Sign:
The affected tibia sags posteriorly compared to the unaffected knee. (In given position, the tibia drops posteriorly on the femur if the posterior cruciate ligament’s integrity is compromised)