Intraoperative localization of the electrode of the cochlear implant via Transimpedance Matrix Measurements

Objective During cochlear implantation, electrophysiological tests are performed to document correct technical functioning of implant and electrodes. The data from transimpedance matrix (TIM) measurements enables the generation of a heat map or TIM profile measuring the spatial distribution of voltage in relation to the electrode array. In rare cases, the electrode array of the cochlear implant (CI) is malpositioned (i.e. tip fold-over).