Electrical Impedance as a Biomarker for Inner Ear Pathology Following Lateral Wall and Peri-modiolar Cochlear Implantation
Chanan Shaul, Christofer W Bester, Stefan Weder, June Choi, Hayden Eastwood, K Padmavathi, Aaron Collins, Stephen J O'Leary
OTOLOGY & NEUROTOLOGY | LIPPINCOTT WILLIAMS & WILKINS | Published : 2019
OBJECTIVES/HYPOTHESIS: Spikes in cochlear implant impedance are associated with inner ear pathology after implantation. Here, we correlate these spikes with episodes of hearing loss and/or vertigo, with a comparison between lateral wall and peri-modiolar electrode arrays. METHODS: Seven hundred seventy recipients of Cochlear's slim-straight, lateral wall electrode (CI422), or peri-modiolar (CI512) electrode were investigated for impedance spikes. Impedance fluctuations were defined as a median rise of ≥ 4 kΩ across all intracochlear electrodes from baseline measurements taken 2 weeks after switch-on. Medical records were analyzed from 189 of the 770 patients. RESULTS: The slim straight, late..View full abstract
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S.J.O. is funded by the National Health and Medical Research Council (Australia). This research was conducted at the Royal Victorian Eye and Ear Hospital and funded by the National Health and Medical Research Council (Australia).