Systematic review of cochlear implantation in adults with asymmetrical hearing loss

Raghunandhan Sampathkumar*, AXEL KAEHNE, Nirmal Kumar, Mohan Kameswaran, Richard Irving

*Corresponding author for this work

    Research output: Contribution to journalArticle (journal)peer-review

    3 Citations (Scopus)


    Background: Rapid advances in cochlear implantation has witnessed an expanding spectrum for candidacy worldwide. This includes a subgroup of adults with asymmetrical hearing loss who have a wide range in their hearing capacity between the two ears. As per guidelines they are not included in mainstream candidacy for CI across the world. Evidence is now emerging to support the benefits of CI in AHL.
    Methods: This review analyzed literature regarding the outcomes of CI in AHL. Primary outcome measure was to assess audiological benefits and secondary outcome measure was to assess hearing related quality of life. 15 relevant articles, published worldwide between 2009 and 2019 were chosen. CASP checklist for systematic reviews was used to ascertain the quality of literature. The strength of recommendations from each study was analyzed and classified as strong, moderate, weak or none based on GRADE guidelines.
    Results: Heterogeneity in samples was obvious and samples varied largely between the studies. The levels of evidence ranged from systematic review to expert opinion, but overall they reflected positively on both audiological and QOL benefits.
    Conclusion: CI provides important auditory and QOL benefits in AHL, but there is no high level evidence as yet to strongly support CI for AHL. A long term multi-centric study is necessary to influence a change in practice for a growing population of AHL
    Original languageEnglish
    Pages (from-to)1
    Number of pages19
    JournalCochlear Implants International
    Publication statusPublished - 15 Jun 2021


    • Hearing loss (H.loss)
    • Cochlear implants (CI)
    • Hearing Aids (H.Aids)
    • Asymmetrical hearing loss (AHL)
    • Bimodal Hearing
    • Speech discrimination
    • Hearing related quality of life (QOL)


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