Round Window Membrane Insertion With Perimodiolar Cochlear Implant Electrodes

• DOI: 10.1097/mao.0b013e318280da2a
• Publication Date: 2013-03-22T21:29:47Z
• Authors: Annekatrin Coordes; Arne Ernst; Goetz Brademann; Ingo Todt
• Keywords: Round window; Cochlear Implantation

The round window membrane (RWM) approach is designed to provide an atraumatic scala tympani implantation with the goal of enhanced preservation hearing and vestibular receptor function. Perimodiolar electrode designs offer advantages in electrophysiologic testing. However, perimodiolar arrays have only been investigated insertion trials using temporal bone material. aim present study was evaluate placement a clinical trial.The prospective nonrandomized included 27 patients (October 2010 February 2011). Due RWM approach, cochlear performed array fitted stylet that enables movement through first turn by withdrawing stylet. We judged feasibility approaches electrodes flat panel detector radiography. Hearing preservation, function (vestibular evoked myogenic potentials, subjective haptic vertical, caloric irrigation), vertigo were evaluated all approaches.For anatomic reasons, insertions possible 21 cases (78%). basilar disruption rate 19% electrodes. In those position within tympani, functions remained unchanged. residual unsatisfactory. mean pure-tone average loss dB.We believe if regularly, technique has almost no negative effects on produces vertigo. hair cells may be more sensitive traumas than cells. use require achieve preservation.