COMPARISON OF PREOPERATIVE ELECTROSTIMULATION DATA USING AN EAR-CANALELECTRODE AND A PROMONTORY NEEDLE ELECTRODE

Objective: To compare the electrical stimulation results of the ear-ca nal electrode with those of a promontory needle. Patients and Methods: In thirty-three adult patients, the ear-canal electrode test was comp ared with the needle electrode promontory test with respect to sound p erception, rhythm detection, frequency, and disturbing side effects. R esults: The ear-canal electrode test, in comparison with the needle el ectrode promontory test, resulted in vibrotactile sensation in additio n to auditory sensation in some patients, less auditory fatigue, highe r threshold levels, and lower discomfort levels. Conclusion: Reliable assessment of deafness in children requires, in addition to electrical stimulation, determination of the electrical evoked auditory brainste m response with the patient under anesthesia.