You’re in the middle ofa knee evaluation, and your patient reports a catching sensation deep inside the joint. You need a test to help you differentiate a meniscal injury from other sources of pain. This is where McMurray’s Test becomes a key part of your orthopedic toolkit.
What is McMurray’s Test?
McMurray’s Test is a specialized orthopedic special test used to assess for a tear of the meniscus—specifically, the medial or lateral meniscus of the knee. It’s a provocative test that aims to trap a torn piece of cartilage between the femur and tibia to reproduce the patient’s symptoms. You’ll perform this with the patient lying supine, using a combination of flexion, rotation, and a varus or valgus stress to load the respective meniscus.
Why McMurray’s Test Matters in Physical Therapy Practice
This test is a critical component of your clinical reasoning, but it’s not a standalone diagnosis. A positive test—a palpable or audible clunk or click along the joint line—provides strong evidence for a meniscal lesion. This finding helps guide your Plan of Care (POC), potentially shifting your focus from general knee strengthening to specific interventions like joint mobilization and activity modification. More importantly, it helps you decide when a referral to an orthopedist for further imaging (MRI) or surgical consultation is warranted, which is crucial for optimal patient outcomes.
What You’ll See in the Clinic
You’ll typically see a patient with complaints of deep knee pain, swelling, or mechanical symptoms like catching, locking, or giving way. To perform the test, you’ll flex the knee fully, then internally rotate the tibia while applying a varus stress to test the lateral meniscus, or externally rotate with a valgus stress for the medial meniscus. As you extend the knee, you’re feeling for a click or thud.
“During the eval, McMurray’s test was positive with a reproducible clunk over the medial joint line. Patient reports this recreates their catching sensation. Due to this finding and their history of twisting injury, I will focus on reducing effusion and restoring full knee extension, while coordinating with the physician for a possible MRI.”
Common Pitfall & Pro Tip
⚠️ Pitfall: Performing the test too quickly or with too much force. A rapid, aggressive sweep can cause a false negative due to muscle guarding or a false positive by creating a click from the patella or other soft tissue. The movement should be slow, controlled, and deliberate.
💡 Pro Tip: Isolate the tibia, not the foot. A common error is to rotate the foot and ankle, which dissipates the rotational force. Grip the heel firmly and rotate the tibia directly from the knee. This ensures the stress is placed precisely on the meniscus.
Memory Aid for McMurray’s Test
Think “M for Medial”: To test the Medial meniscus, you apply a Valgus (M→V) stress and Externally rotate the tibia. This opens up the medial joint space to catch the torn cartilage. It’s a simple way to keep the test components straight under pressure.
NPTE Connection
Expect to see this in questions regarding special tests for the knee. You’ll likely be asked to identify the test based on a description of the patient position and movement, or to differentiate it from tests like Lachman’s Test or Apley’s Compression Test.
Related Physical Therapy Concepts
Understanding McMurray’s Test is part of a comprehensive knee assessment that includes Apley’s Compression and Distraction Test, which helps differentiate meniscal from ligamentous involvement. This knowledge also connects to post-surgical rehab for Meniscal Repair or Partial Meniscectomy, where your POC must respect tissue healing and weight-bearing precautions. It also pairs well with assessing for Osteoarthritis, where meniscal degeneration is a common finding.
Quick Reference
✓ Positive test criteria: Palpable/audible click or clunk, or reproduction of pain over the joint line ✓ Priority level: High – Strongly suggests meniscal pathology ✓ PT Interventions/Considerations: • Assess for joint effusion and range of motion deficits • Modalities for pain and swelling (ice, compression) • Progressive strengthening of quadriceps and hamstrings • Gentle joint mobilization to restore accessory motion • Educate on activity modification and ergonomics to avoid aggravating movements
Bottom line: McMurray’s Test is a valuable piece of the puzzle when you suspect a meniscal injury, helping you sharpen your clinical judgment and guide your patient toward the right path.