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  • Title: [How is tinnitus influenced by cochlear implantation?].
    Author: Greimel KV, Meco C, Mair A, Kohlböck G, Albegger K.
    Journal: HNO; 2003 Mar; 51(3):226-31. PubMed ID: 12627251.
    Abstract:
    INTRODUCTION: Tinnitus is one of the most common symptoms in patients with profound sensorineural hearing loss (SNHL). Cochlear implantation (CI), which has become a standard method to rehabilitate profound SNHL, has been also observed to effect tinnitus in many cases. In the Salzburg Cochlear Implant Center,more than 230 profoundly deaf patients, mainly children,have been provided with CI between 1992 and 2000. PATIENTS AND METHOD: In a retrospective study, 39 adult patients were assessed by questionnaire for the frequency of tinnitus, subjective loudness sensitivity, and tinnitus-specific impairment before and after the CI. RESULTS: Before implantation 26 patients had tinnitus, while 24 patients had the same symptoms after the CI. In 13 patients (50%) tinnitus remained unaffected by the operation. Intensity of tinnitus decreased in seven patients (26.7%), and in four patients (15.4%) it completely disappeared after the implantation.However, intensity increased in two patients (7.7%), and in another two patients, who had not experienced tinnitus before, it began first after the implantation. No correlation has been found between the daily using time of CI and the tinnitus impairment.Also no effect of tinnitus was seen on postoperative hearing assessed by Freiburg numbers, monosyllables, and Innsbruck sentence test scores. CONCLUSION: CI significantly reduces the subjectively perceived impairment, although the reduction in the subjectively perceived loudness of the tinnitus is not significant.
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