Abstract
BackgroundTinnitus associated with single-sided deafness (SSD) is frequent and often incapacitating, and is difficult to treat. Numerous studies have reported the suppression of tinnitus by electrical stimulation of the acoustic pathway through a cochlear implant (CI), with a low risk of worsening of tinnitus after implantation.ObjectiveThe main aim of this study was to demonstrate the effectiveness of CI as a treatment option in patients with SSD and incapacitating tinnitus.Patients and methodsWe studied the tinnitus-suppression effect of CI in a series of 13 patients with unilateral profound sensorineural hearing loss (SSD), associated with incapacitating tinnitus with normal hearing in the contralateral ear. Tinnitus impact was measured with the Tinnitus Handicap Inventory (THI), and tinnitus severity was measured with the Tinnitus Rating Scale (TRS) before and after CI.ResultsThirteen patients were enrolled in this study, eight men and five women, ranging in age from 24 to 60 years with a mean±SD of 40±10 years. Mean scores for THI and TRS were obtained preoperatively and at 1 and 3 months postoperatively after activation of the CI. Mean scores for the THI total scores ranged from 79.6±7 preoperatively to 12±13.5 at 3 months postoperatively. Mean scores for the TRS ranged from 4.53±0.5 preoperatively to 1.46±0.5 at 3 months postoperatively. The postoperative THI and TRS improved significantly as compared with the baseline preoperative scores (P<0.005).ConclusionThe outcome of the current study supports the belief that CI is not only a treatment option for hearing loss in SSD but also a treatment option to suppress tinnitus.
Highlights
Tinnitus associated with single-sided deafness (SSD) is frequent and often incapacitating, and is difficult to treat
Thirteen patients were enrolled in this study, eight men and five women, ranging in age from 24 to 60 years with a mean±SD of 40±10 years
The outcome of the current study supports the belief that cochlear implantation (CI) is a treatment option for hearing loss in SSD and a treatment option to suppress tinnitus
Summary
Tinnitus associated with single-sided deafness (SSD) is frequent and often incapacitating, and is difficult to treat. The prevalence of chronic tinnitus in adults ranges between 6 and 20%, with 1–3% experiencing severe and disabling tinnitus that interferes with daily life [1] It has a prevalence between 66 and 88% in patients who are candidates for cochlear implantation (CI) [2]. Unilateral idiopathic sudden sensorineural hearing loss (SNHL) as a common cause of single-sided deafness (SSD) has an incidence of 2–20/100 000 adults per year. This type of hearing loss is irreversible in more than 60% of cases in spite of therapy and ends in permanent SSD [3]. The same authors reported that tinnitus in the affected ear may be disabling, using the Tinnitus Handicap Inventory (THI) [5]
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