Journal article

Intraoperative Observational Real-time Electrocochleography as a Predictor of Hearing Loss After Cochlear Implantation: 3 and 12 Month Outcomes

Stephen O'Leary, Robert Briggs, Jean-Marc Gerard, Claire Iseli, Benjamin PC Wei, Sylvia Tari, Alex Rousset, Christo Bester



OBJECTIVE: A decrease in intracochlear electrocochleographic (ECochG) amplitude during cochlear implantation has been associated with poorer postoperative hearing preservation in several short-term studies. Here, we relate the stability of ECochG during surgery to hearing preservation at 3- and 12-months. METHODS: Patients with hearing ≤80-dB HL at 500 Hz were implanted with a slim-straight electrode array. ECochG responses to short, high-intensity, 500-Hz pure tones of alternating polarity were recorded continuously from the apical-most electrode during implantation. No feedback was provided to the surgeon. ECochG amplitude was derived from the difference response, and implantations classif..

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Funding Acknowledgements

S.O. is funded by the National Health and Medical Research Council (Australia). The corresponding author's University receives research grants from Cochlear Ltd. This research was conducted at the Royal Victorian Eye and Ear Hospital and funded by the National Health and Medical Research Council (Australia).