Comparison of electrode impedance measures between a dexamethasone-eluting and standard Cochlear™ Contour Advance® electrode in adult cochlear implant recipients

•The dexamethasone eluting electrode array provided sustained lower electrode impedance measures compared to the control group.•The pattern of change in both standard MP1+2 and 4-point impedance measures varied by cochlear region and by device groups.•Impedance increases on basal electrodes after 3 months was mediated by the early delivery of dexamethasone.