A clinical shift toward personalized cochlear implantation: Using preoperative planning to optimize insertion depth

cochlear anatomy exhibited substantial inter-individual variability. Implementing preoperative, anatomy-tailored planning was associated with the selection of longer arrays, deeper and more consistent AID, and overall high planning accuracy. Deviations from the planned position were primarily linked to shorter CDL and intraoperative resistance, whereas deeper targets themselves did not reduce accuracy. Audiological performance at 6 months did not differ significantly between groups, although a modest trend favored the planned cohort. These findings support the feasibility of routine, examiner-independent planning and suggest that patient-specific anatomical markers should inform the selection of an appropriate electrode array.