Electrocochleography for Monitoring Hearing Preservation During Cochlear Implantation

Is automated intraoperative monitoring of residual hearing during cochlear implantation feasible using objective electrocochleography analysis?In this cross-sectional study of 112 adults receiving cochlear implants, decreases in cochlear microphonic amplitude were associated with postoperative hearing loss when they were persistent or occurred near the end of electrode insertion. Hearing preservation was particularly poor when the amplitude ratio between the auditory nerve neurophonic and cochlear microphonic did not increase or when the cochlear microphonic phase remained stable.Automatically extracted electrocochleography features may predict residual hearing outcomes during cochlear implantation, and these findings support the development of real-time feedback systems assisting surgeons during implantation.

Corresponding Author: Raphael Andonie, PhD, ARTORG Center for Biomedical Engineering Research, University of Bern, Murtenstrasse 50, 3008 Bern, Switzerland (raphael.andonie@unibe.ch).

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