Role of Ultrasound to Monitor Patients With Carpal Tunnel Syndrome Treated With a Local Corticosteroid

Objectives Carpal tunnel syndrome (CTS) is an entrapment neuropathy resulting from compression of the median nerve at the carpal tunnel (CT). We assessed the role of high‐resolution ultrasound (US) in monitoring patients with CTS treated with corticosteroid injection. Methods We performed high‐resolution US evaluations of the wrists of patients with CTS before and after treatment with local corticosteroid. Thirty‐nine and 17 wrists were included for analysis at the end of 1 and 3 months, respectively. The cross‐sectional area (CSA) and anteroposterior diameter (APD) of the median nerve at the CT and clinical and electrophysiologic data were recorded. We assessed whether changes in US measurements before and after the treatment correlated with clinical and electrophysiologic parameters. Results The Boston symptom severity scale (p