New method for inserting and fixing the active electrode during cochlear implantation.

Abstract

Cochlear implantation has been performed for 15 years by the authors; altogether 117 implantations were carried out during this period. Different techniques had been used: at first after having performed atticoantrotomy the active electrode was inserted through posterior tympanotomy but fixing the electrode with this method was relatively not that easy. During the last 6 years implantations were carried out using the authors' new method. At the beginning of the operation cochleostomy was prepared by means of lateral tympanotomy. Introduction of the electrode was performed through a tunnel that had been drilled previously through the posterior wall of the external auditory canal. With a piece of muscle the active electrode was properly secured in the cochleostomy and also a narrow tunnel was prepared in the posterior wall for securing the cable with a Dacron tie. The authors' method of implantation proved to be perfect for introducing the electrode and also for fixing it with long-lasting results.