The study included 29 patients with SSD who underwent CI. In 10 of the patients, the hearing loss was due to Meniere’s disease and was accompanied by recalcitrant vertigo. A labryinthectomy was done in the latter group during the implant procedure, as well as in two patients from the larger group.
Several measures of auditory function improved significantly in the 19 patients who were available for up to a one-year follow-up. “One of the more surprising findings in both groups was that many of the patients were able to localize sound,” said Dr. Gantz. “This is not generally possible with bone conduction devices or CROS [contralateral routing of sound] hearing aid technology. There was also improved performance in noise [discrimination] with binaural hearing.”
Overall, he added, the patients with vertigo “were the most satisfied, because they were free of the recurring spells of dizziness and also had significant return of hearing in an ear that had not heard for several years.”