Posterior Sag Sign
- Posterior Sag Sign is used to assess the integrity of the posterior cruciate ligament
- 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 when the affected tibia sags posteriorly compared to the unaffected knee.
- Sensitivity: 79 -100%
- Specificity: 100 %
- Campbel's Operative Orthopaedics 13th Book