Accuracy of Ultrasonography for the Diagnosis of Carpal Tunnel Syndrome: A Systematic Review and Meta-Analysis

Both ultrasonography measurements for the diagnosis of CTS showed sufficient accuracy for their use in clinical settings, although the overall accuracy was slightly higher for inlet-level than for outlet-level measurements. The addition of outlet and inlet measurements does not increase the accuracy for the diagnosis. Therefore, the inlet-level ultrasonography measurement appears to be an appropriate method for the diagnosis of CTS.