Detta är en Kandidat-uppsats från Göteborgs universitet/Institutionen för neurovetenskap och fysiologi

Sammanfattning: Background:There has previously been a lack of optimal audiological rehabilitation for individuals with severe high-frequency hearing impairment with residual low-frequency hearing. There is now a treatment which combines electric stimulation of the innerear, via a cochlear implant and acoustic stimulation with or without a hearing aid.Purpose:The aim was to investigate how treatment with combined electric and acoustic stimulation (EAS) affects speech recognition and residual hearing. A further aim was to investigate whether there is a difference in outcomes between treatment in case of normal low frequency hearing thresholds and treatment with aided low frequency hearing.Method:The review encompassed 15 scientific articles published 2006-2016. Participants were a minimum of 18 years old. Articles were found via Pubmed, Cinahl and in the reference lists of scientific articles.Result:Conclusion:Results showed an improvement in speech recognition both in quiet and noise with EAS compared to hearing aid alone or cochlear implant alone. The best results were obtained with EAS in combination with contralateral acoustic hearing. Moreover, results showed preserved residual hearing for a majority of the subjects but with some degradation of hearing thresholds and a minor risk for total hearing loss.Treatment with EAS is successful regarding improved speech recognition and preservation of residual hearing which offers an alternative solution for a group of individuals for whom there has not been an optimal audiological rehabilitation. Further research is necessary to evaluate the safety and efficacy of the treatment.

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