A comparison of the ultrasonographic median nerve cross-sectional area at the wrist and the wrist-to-forearm ratio in carpal tunnel syndrome.

Background: Electrophysiologic (EDX) study is the most valuable method in grading the severity of carpal tunnel syndrome (CTS), but it is invasive and painful. We evaluated the efficacy of ultrasound for this purpose.

Materials And Methods: Eighty-one wrists of 52 consecutive patients with clinical evidences of CTS, confirmed and graded by EDX as mild, moderate, and severe, were examined by ultrasonography.