CMC Grind Test
What is the "CMC Grind Test" used for?
- Assess the integrity of the thumb CMC joint
How to perform the "CMC Grind Test"?
- The grind test is performed by gripping the patient’s metacarpal bone of the thumb and moving it in a circle and loading it with gentle axial forces.
What is the positive result?
- A patient with thumb joint arthritis generally complains of a sudden sharp pain at the CMC joint which can also be associated with Crepitus
- This indicates a positive test
Test Accuracy
- Sensitivity: 42 %
- Specificity: 80 %
References
