Endoscopically guided placement of prefabricated cochlear implant electrodes in a common cavity malformation

Objective: To devise a safe and effective method of optimal customized electrode placement in the common cavity of children with cochleovestibular malformations. Methods: Specialized electrodes were manufactured on the basis of three-dimensional data obtained from the high resolution computed tomography (HRCT) scans of the temporal bones of these two children. Electrode positioning was achieved with direct endoscopic view of the cavity utilizing a three-hole common cavity technique. Results: Optimal electrode positioning in apposition to the medial. neuroepithelium in the common cavity was verified visually intraoperatively. Postoperatively, minimal stable electrical current levels were found to be required. Conclusions: Custom-designed electrodes have the potential to offer improved results in children with common cavity malformations. Intraoperative direct positioning may further improve these results. (c) 2005 Published by Elsevier Ireland Ltd.