Yes. Ultrasound is a validated first-line investigation for carpal tunnel syndrome (CTS). It measures the cross-sectional area (CSA) of the median nerve at the carpal tunnel inlet — enlargement above 10 mm² is a reliable marker of compression neuropathy, comparable to nerve conduction studies for diagnosis. Ultrasound can also identify structural causes of CTS such as ganglia, lipomas, anomalous muscles, or hypertrophied synovium pressing on the nerve.
For injection therapy, ultrasound guidance significantly improves accuracy of carpal tunnel corticosteroid injection, reducing the risk of inadvertent median nerve injection. If CTS is confirmed and symptoms are persistent, your specialist will discuss the relative merits of injection versus surgical decompression.
Fowler JR et al. Clin Orthop Relat Res 2013. | Klauser AS et al. Radiology 2009;250:171–7.