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High-frequency Cochlear Nerve Deficit Region: Relationship With Deaf Duration and Cochlear Implantation Performance in Postlingual Deaf Adults

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Abstract
Objective: To analyze the changes of cochlear nerve diameter and the presence of a cochlear nerve deficit at a high-frequency region and investigate their effects on cochlear implant (CI) performance in postlingual deaf adults. Study Design: Retrospective. Setting: Tertiary care academic center. Patients: Eighty-three postlingual deaf adults with no labyrinthine anomalies or cognitive deficits who received a CI with perimodiolar electrodes from a single manufacturer. Main Outcomes and Measures: We evaluated the changes of cochlear nerve diameter and the presence of a "tail sign," defined as identifiable nerve fibers originating from the far basal turn of the cochlea, which represents the presence of cochlear nerve at a high-frequency region in magnetic resonance imaging, on monosyllabic word recognition scores. Results: The cochlear nerve diameter showed a positive correlation with word recognition scores (maximum diameter, R-2 = 0.26, p < 0.01; minimum diameter, R-2 = 0.26, p < 0.01), but a negative correlation with deaf duration. Recipients with a positive tail sign performed better (73 +/- 19%) than those without (45 +/- 24%, p < 0.01). A positive tail sign was more commonly found in good performers (52 of 62, 84%) than in poor performers (5 of 21, 24%, p < 0.01). Conclusions: Favorable outcomes could be anticipated in postlingual deaf adults with a large cochlear nerve diameter and positive tail sign. A presence of cochlear nerve at a high-frequency region may be an imaging marker for predicting good CI performance.
Author(s)
강우석곽민영김예리박홍주안중호이지연정종우
Issued Date
2021
Type
Article
Keyword
AdultsDeaf EvaluationImplantsArtificialMedical collegesProsthesis
DOI
10.1097/MAO.0000000000003092
URI
https://oak.ulsan.ac.kr/handle/2021.oak/8511
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_proquest_miscellaneous_2492657108&amp;context=PC&amp;vid=ULSAN&amp;lang=ko_KR&amp;search_scope=default_scope&amp;adaptor=primo_central_multiple_fe&amp;tab=default_tab&amp;query=any,contains,High-frequency%20Cochlear%20Nerve%20Deficit%20Region:%20Relationship%20With%20Deaf%20Duration%20and%20Cochlear%20Implantation%20Performance%20in%20Postlingual%20Deaf%20Adults&amp;offset=0&amp;pcAvailability=true
Publisher
OTOLOGY NEUROTOLOGY
Location
미국
Language
영어
ISSN
1531-7129
Citation Volume
42
Citation Number
6
Citation Start Page
844
Citation End Page
850
Appears in Collections:
Medicine > Medicine
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