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DOI: 10.1055/s-0040-1711166
Electrode Dislocation after Cochlea Implantation
Background To estimate the dislocation rate of cochlear electrodes in cochlear implant (CI) patients with straight and precurved electrodes.
Methods In a retrospective case series, 560 patients (414 precurved, 146 straight) received a Cochlear Cooperated CI between January 2010 and August 2018. Electrode impedance measured intraoperatively and during follow-up has been assessed. In case of impedance change of the 3 most basal electrodes a computer tomography (CT) scan has been performed. Cochlear position of the electrode array has been determined and compared to the one day postoperative electrode position (plain radiography).
Results Changes in electrode impedance in the basal electrodes occurred in 2.1% ears (n=12). CT scan was available in 9 patients and revealed a dislocation of the electrode array in 6 patients. Straight electrode types showed a significantly higher dislocation rate than precurved electrode types (4.1% vs 0%).
Conclusions Electrode impedance is a useful tool to investigate electrode array integrity as well as to raise suspicion of possible electrode dislocation. Patients implanted with a straight electrode array might benefit from lead wire fixation.
Poster-PDF A-1150.PDF
Publication History
Article published online:
10 June 2020
© 2020. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).
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