Clarke's Sign (Patellar Grind Test) | Rationale & Interpretation

The video tutorial explains the patellar grind test, also known as Clark's sign, used to assess patellofemoral pain syndrome. The test involves positioning the patient supine, applying force to the patella, and instructing the patient to slowly contract their quadriceps. The test is not pleasant and requires careful monitoring for pain. A positive result may indicate patellofemoral pain syndrome or other conditions like chondromalacia patella. The tutorial emphasizes the importance of slow contraction to avoid discomfort.

What is the primary purpose of the patellar grind test?

• To test for meniscal tears

• To measure knee flexion

• To evaluate patellofemoral pain syndrome

• To assess ligament stability

Which condition is NOT typically associated with a positive Clark's sign?

• Anterior cruciate ligament tear

• Patellofemoral degenerative joint disease

• Chondromalacia patella

• Patellofemoral pain syndrome

What is the correct positioning of the patient for Clark's sign?

• Standing

• Prone

• Supine

• Sitting

Why is it important for the patient to slowly build up tension in the quadriceps during the test?

• To prevent the patella from dislocating

• To ensure accurate measurement of knee flexion

• To avoid causing pain or discomfort

• To strengthen the quadriceps muscle

What does a positive Clark's sign indicate?

• Absence of any knee issues

• Immediate need for surgery

• Possible presence of various knee conditions

• Definitive presence of patellofemoral pain syndrome