Valgus Stress Test (Knee) Special Test

What is it used for?

• Assessing the Medial Collateral Ligament (MCL).

How to Perform

• Position: Patient supine.
• Action: Apply a Valgus (inward) force to the knee while stabilizing the ankle.
• Test 1: Perform at 0° (full extension).
• Test 2: Perform at 30° flexion (isolates superficial MCL).

Interpretation of Results

• Positive Test: Pain or excessive gapping (>5mm).
• Note: Laxity at 0° indicates major damage to MCL + Cruciate ligaments (ACL/PCL).

Diagnostic Accuracy

• Sensitivity: 86-96%

References

• Magee, D. J. (2021). Orthopedic Physical Assessment.