Using OTOPLAN to estimate the angular insertion depth for patients with a FLEXsoft electrode array from MED-EL

Introduction OTOPLAN uses radiological images to estimate the length of the cochlear duct (estCDL) and the insertion depth preoperatively. Based on these calculations surgeons can choose the appropriate length of the electrode array before implantation. In our clinic nearly every patient, who received a cochlear implant (CI) from MED-EL, got the FLEXsoft (which was the longest electrode array at the time of our study), as long as their radiological images didn't show any cochlear malformation. This study aims to examine, whether OTOPLAN can predict the maximum angular insertion depth (maxAID) of the electrode array correctly for patients with FLEXsoft.