Patellofemoral Grind Test (Clarke’s Sign) Special Test

What is it used for?

• Detecting Chondromalacia Patella or Patellofemoral Pain Syndrome (PFPS).

How to Perform

• Position: Patient supine, knee extended.
• Action: Examiner places the web of the hand proximal to the patella and pushes it distally.
• Command: Ask patient to contract quadriceps.

Interpretation of Results

• Positive Test: Retropatellar pain or inability to hold the contraction.
• Warning: High rate of false positives; can be painful even for normal knees. Use caution.

References

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