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Comparison of preoperative electrostimulation data using an ear-canal electrode and a promontory needle electrode
A Lesinski1, X Littmann, R D Battmer
1ENT Clinic, Medical School of Hannover, Germany.
Objective:
To compare the electrical stimulation results of the ear-canal electrode with those of a promontory needle.
Patients And Methods:
In thirty-three adult patients, the ear-canal electrode test was compared with the needle electrode promontory test with respect to sound perception, rhythm detection, frequency, and disturbing side effects.
Results:
The ear-canal electrode test, in comparison with the needle electrode promontory test, resulted in vibrotactile sensation in addition to auditory sensation in some patients, less auditory fatigue, higher 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 brainstem response with the patient under anesthesia.