Open AccessEstablishing Reproducibility and Correlation of Cochlear Microphonic Amplitude to Implant Electrode Position Using Intraoperative Electrocochleography and Postoperative Cone Beam Computed Tomography
Author(s) -
Andrew Soulby,
Steve Connor,
Dan Jiang,
Terry Nunn,
Patrick Boyle,
Irumee Pai
Publication year - 2021
Publication title -
ear and hearing
Language(s) - English
Resource type - Journals
eISSN - 1538-4667
pISSN - 0196-0202
DOI - 10.1097/aud.0000000000001010
Subject(s) - cochlear implant , reproducibility , electrode , amplitude , round window , cone beam computed tomography , biomedical engineering , electrocochleography , materials science , medicine , cochlea , optics , audiology , surgery , computed tomography , physics , hearing loss , mathematics , statistics , quantum mechanics
The primary objective of this study was to establish the reproducibility of cochlear microphonic (CM) recordings obtained from a cochlear implant (CI) electrode contact during and immediately after insertion. This was achieved by evaluating the insertion angle and calculating the position of the apical electrode contact during insertion, using postoperative cone beam computed tomography (CBCT). The secondary objective was to create individualized patient maps of electrode contacts located within acoustically sensitive regions by correlating the CM amplitude to the electrode position determined using CBCT.