Comparison of ring versus disposable disk electrodes in recording antidromic sensory median nerve conduction study for diagnosis of carpal tunnel syndrome.

Purpose: The authors performed a study using disposable disk electrodes, currently used to record motor nerve conduction study, for median antidromic sensory recording from the second digit with the aim of establishing efficiency by using one type of electrode throughout the entire nerve conduction study. This study aims to establish noninferiority with the use of disk electrodes rather than conventionally used nondisposable ring electrodes in the diagnosis of carpal tunnel syndrome.

Methods: For median sensory response, 4 parameters were studied: (1) onset latency, (2) peak latency, (3) amplitude, and (4) conduction velocity.