Journal article

Four-point impedance as a biomarker for bleeding during cochlear implantation

Christofer Bester, Tayla Razmovski, Aaron Collins, Olivia Mejia, Soren Foghsgaard, Alistair Mitchell-Innes, Chanan Shaul, Luke Campbell, Hayden Eastwood, Stephen O'Leary



Cochlear implantation has successfully restored the perception of hearing for nearly 200 thousand profoundly deaf adults and children. More recently, implant candidature has expanded to include those with considerable natural hearing which, when preserved, provides an improved hearing experience in noisy environments. But more than half of these patients lose this natural hearing soon after implantation. To reduce this burden, biosensing technologies are emerging that provide feedback on the quality of surgery. Here we report clinical findings on a new intra-operative measurement of electrical impedance (4-point impedance) which, when elevated, is associated with high rates of post-operative..

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Awarded by National Health and Medical Research Council (Australia)

Funding Acknowledgements

We would like to thank engineers from Cochlear Ltd. for assistance in developing software, the audiologists and staff at the Royal Victorian Eye and Ear Hospital Implant Clinic for their support during the project, the surgeons and surgical registrars of the Clinic, and Amy Hampson for proofreading. Luke Campbell was funded by the Garnett Passe and Rodney Williams Memorial Foundation. Stephen O'Leary was funded by the National Health and Medical Research Council (Australia), GNT0628679 and GNT107867.