Intraoperative Impedance-Based Estimation of Cochlear Implant Electrode Array Insertion Depth

Objective: Cochlear implant impedances are influenced by the intracochlear position of electrodes. Herein, we present an intuitive approach to calculate tissue resistances from transimpedance recordings, ultimately enabling estimate insertion depth cochlear Methods: Electrode positions were measured in computed-tomography images 20 subjects implanted with same lateral wall model. The estimated intraoperative telemetry data using bivariate spline extrapolation recordings. Using a phenomenological model, electrode depths estimated. Results: proposed method enabled linear all electrodes be average error 0.76 ± 0.53 mm. Conclusion: Intraoperative recordings correlate and angular insertion, estimations accuracy that can useful for clinical applications. Significance: used objectively assess surgical outcomes during after implantation based on non-invasive readily available