Ultrasonographic median nerve cross-section areas measured by 8-point 'inching test' for idiopathic carpal tunnel syndrome: a correlation of nerve conduction study severity and duration of clinical symptoms

摘要

BackgroundIncremental palmar stimulation of the median nerve sensory conduction at the wrist, the "inching test", provides an assessment with reference to segments proximal and distal to the entrapment. This study used high-resolution ultrasonography (US) to measure the median nerve's cross-section areas (CSAs) like the "inching test" and to correlate with the nerve conduction study (NCS) severity and duration of carpal tunnel syndrome (CTS).