Chronic intracochlear electrical stimulation at high charge densities: reducing platinum dissolution

Abstract

Significant increases in tissue response and Pt corrosion were observed following stimulation at high charge densities. Charge recovery using CC, and to a lesser extent AP, reduced the amount of Pt corrosion but not the tissue response. Stimulation at change densities an order of magnitude higher than those used when programming cochlear implant recipients in the clinic, produced a vigorous tissue response and corrosion products without evidence of neural loss.