Introduction
deafness, hearing preservation, intraoperative ECochG., hearing loss
HEARING LOSS
Cochlear implants (CI) are successfully implanted in patients with deafness or severe hearing loss and enable patients to receive sound. The surgically inserted electrode directly stimulates the human spiral ganglion cells [A method enabling intraoperative monitoring of hearing preservation is electrocochleography (ECochG) [Digital microscopes such as the ARRISCOPEThe aim of this prospective randomized study is to demonstrate the postoperative audiometric results in the first 50 patients operated with the digital microscope using intraoperative ECochG. We were specifically aiming at comparing audiometric results and insertion time between patients who were operated on with picture-in-picture technique on the one side, to patients who were implanted without the picture-in-picture technique on the other side. In the latter, the surgeon got the information about the intraoperative ECochG-potentials via verbal feedback from the audiologist.