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. 2020 Oct;41(9):1190-1197.
doi: 10.1097/MAO.0000000000002784.

Cochlear Implant Outcomes Following Vestibular Schwannoma Resection: Systematic Review

Cameron C Wick  1 , Margaret J Butler  2 , Lauren H Yeager  3 , Dorina Kallogjeri  1 , Nedim Durakovic  1 , Jonathan L McJunkin  1 , Matthew A Shew  1 , Jacques A Herzog  1 , Craig A Buchman  1
Affiliations

Cochlear Implant Outcomes Following Vestibular Schwannoma Resection: Systematic Review

Cameron C Wick et al. Otol Neurotol. 2020 Oct.

Abstract

Objective: Hearing loss remains a significant morbidity for patients with vestibular schwannomas (VS). A growing number of reports suggest audibility with cochlear implantation following VS resection; however, there is little consensus on preferred timing and cochlear implant (CI) performance.

Data sources: A systematic literature search of the Ovid Medline, Embase, Scopus, and clinicaltrails.gov databases was performed on 9/7/2018. PRISMA reporting guidelines were followed.

Study selection: Included studies reported CI outcomes in an ear that underwent a VS resection. Untreated VSs, radiated VSs, and CIs in the contralateral ear were excluded.

Data extraction: Primary outcomes were daily CI use and attainment of open-set speech. Baseline tumor and patient characteristics were recorded. Subjects were divided into two groups: simultaneous CI placement with VS resection (Group 1) versus delayed CI placement after VS resection (Group 2).

Data synthesis: Twenty-nine articles with 93 patients met inclusion criteria. Most studies were poor quality due to their small, retrospective design. Group 1 had 46 patients, of whom 80.4% used their CI on a daily basis and 50.0% achieved open-set speech. Group 2 had 47 patients, of whom 87.2% used their CI on a daily basis and 59.6% achieved open-set speech. Group 2 had more NF2 patients and larger tumors. CI timing did not significantly impact outcomes.

Conclusions: Audibility with CI after VS resection is feasible. Timing of CI placement (simultaneous versus delayed) did not significantly affect performance. Overall, 83.9% used their CI on a daily basis and 54.8% achieved open-set speech.

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