Buechner et al (2010) reported on five subjects with normal hearing on one side and severe-to-profound sensorineural hearing loss and tinnitus on the other side. Each subject served as their own control in a single-subject, repeated-measures design. The purpose of the study was to determine if cochlear implantation (CI) is an appropriate treatment for unilaterally deaf subjects with tinnitus in the deaf ear.
Of note, each of the participants had their normal hearing ear as a reference, each had full electrode insertion and none reported the CI sound as intolerable.
Buechner et al reported some improvements with regard to tinnitus status and speech perception post-CI. However, variation in degree of benefit across multiple situations was common. They reported that CIs in subjects with severe-to-profound hearing loss and tinnitus in the same ear may be beneficial in particular patients and defining the appropriate indications for CIs in these patients is warranted.
For More Information, References, and Recommendations
Baguley DM. (2010) Cochlear Implants in Single-Sided Deafness and Tinnitus Seminars in Hearing 31(4):410-413.
Buechner A, Brendel M, Lesinki-schiedat A, Wenzel G, Frohne-Buechner C, Jaeger B, Lenarz T. (2010) Cochlear Implantation in Unilateral Deaf Subjects Associated with Ipsilateral Tinnitus. Otology & Neurotology 31(9):1381-1385.