Vestibular Function in Children and Adults Before and After Unilateral or Sequential Bilateral Cochlear Implantation

Background: Cochlear implantation (CI) helps patients with severe or profound sensorineural hearing loss (SNHL) restore hearing and speech abilities. However, some patients exhibit abnormal vestibular functions with symptoms such as dizziness or balance disorders, after CI. Whether age at CI and CI...

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Autores principales:	Ruirui Guan, Yanqi Wang, Sasa Wu, Bo Zhang, Jingwu Sun, Xiaotao Guo, Jiaqiang Sun
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	cochlear implant vestibular function children adults unilateral implantation sequential bilateral implantation Neurology. Diseases of the nervous system RC346-429
Acceso en línea:	https://doaj.org/article/f40a98ef6e0243f8bdc3694ef1be942d
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spelling	oai:doaj.org-article:f40a98ef6e0243f8bdc3694ef1be942d2021-11-19T12:27:43ZVestibular Function in Children and Adults Before and After Unilateral or Sequential Bilateral Cochlear Implantation1664-229510.3389/fneur.2021.675502https://doaj.org/article/f40a98ef6e0243f8bdc3694ef1be942d2021-04-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fneur.2021.675502/fullhttps://doaj.org/toc/1664-2295Background: Cochlear implantation (CI) helps patients with severe or profound sensorineural hearing loss (SNHL) restore hearing and speech abilities. However, some patients exhibit abnormal vestibular functions with symptoms such as dizziness or balance disorders, after CI. Whether age at CI and CI approach (unilateral or sequential bilateral) affect vestibular functions in users with cochlear implants remains unclear.Objectives: To investigate the vestibular functions in children and adults before and after unilateral or sequential bilateral CI.Materials and Methods: Thirty-seven patients with severe or profound SNHL who were candidates for a first- or second-side CI were divided into three groups: first-side CI-implanted adults (≥18 years), first-side CI-implanted children (6–17 years), and second-side CI-implanted children (6–17 years). All cases were implanted with the round window approach to minimize damage to the intra-cochlear structures. The caloric test, vestibular evoked myogenic potential (VEMP) test, video head impulse test (vHIT), Dizziness Handicap Inventory (DHI), Pediatric Vestibular Symptom Questionnaire (PVSQ), and audiometric tests were performed before and 1 month after CI.Results: The abnormal rates of caloric test and VEMP test after CI in the first-side CI-implanted adults and children significantly increased compared with those before CI. The pre-implantation VEMP test showed significantly higher abnormal rates between first- and second-side CI-implanted children. No other significant differences of abnormal rates between first- and second-side CI-implanted children or between first-side CI-implanted adults and children were found. In second-side CI-implanted children, PVSQ scores significantly increased at day 3 post-implantation but decreased at day 30.Conclusion: CI has a negative effect on the results of caloric and VEMP tests, but not on vHIT, indicating that the otolith and low-frequency semicircular canal (SCC) are more vulnerable to damage from CI. The alterations of vestibular functions resulting from CI surgery may be independent of age at CI and CI approach (unilateral or sequential bilateral). Long-term impacts on the vestibular function from CI surgery, as well as the chronic electrical stimulation to the cochlea, are still to be investigated.Ruirui GuanYanqi WangSasa WuBo ZhangJingwu SunXiaotao GuoJiaqiang SunFrontiers Media S.A.articlecochlear implantvestibular functionchildrenadultsunilateral implantationsequential bilateral implantationNeurology. Diseases of the nervous systemRC346-429ENFrontiers in Neurology, Vol 12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cochlear implant vestibular function children adults unilateral implantation sequential bilateral implantation Neurology. Diseases of the nervous system RC346-429
spellingShingle	cochlear implant vestibular function children adults unilateral implantation sequential bilateral implantation Neurology. Diseases of the nervous system RC346-429 Ruirui Guan Yanqi Wang Sasa Wu Bo Zhang Jingwu Sun Xiaotao Guo Jiaqiang Sun Vestibular Function in Children and Adults Before and After Unilateral or Sequential Bilateral Cochlear Implantation
description	Background: Cochlear implantation (CI) helps patients with severe or profound sensorineural hearing loss (SNHL) restore hearing and speech abilities. However, some patients exhibit abnormal vestibular functions with symptoms such as dizziness or balance disorders, after CI. Whether age at CI and CI approach (unilateral or sequential bilateral) affect vestibular functions in users with cochlear implants remains unclear.Objectives: To investigate the vestibular functions in children and adults before and after unilateral or sequential bilateral CI.Materials and Methods: Thirty-seven patients with severe or profound SNHL who were candidates for a first- or second-side CI were divided into three groups: first-side CI-implanted adults (≥18 years), first-side CI-implanted children (6–17 years), and second-side CI-implanted children (6–17 years). All cases were implanted with the round window approach to minimize damage to the intra-cochlear structures. The caloric test, vestibular evoked myogenic potential (VEMP) test, video head impulse test (vHIT), Dizziness Handicap Inventory (DHI), Pediatric Vestibular Symptom Questionnaire (PVSQ), and audiometric tests were performed before and 1 month after CI.Results: The abnormal rates of caloric test and VEMP test after CI in the first-side CI-implanted adults and children significantly increased compared with those before CI. The pre-implantation VEMP test showed significantly higher abnormal rates between first- and second-side CI-implanted children. No other significant differences of abnormal rates between first- and second-side CI-implanted children or between first-side CI-implanted adults and children were found. In second-side CI-implanted children, PVSQ scores significantly increased at day 3 post-implantation but decreased at day 30.Conclusion: CI has a negative effect on the results of caloric and VEMP tests, but not on vHIT, indicating that the otolith and low-frequency semicircular canal (SCC) are more vulnerable to damage from CI. The alterations of vestibular functions resulting from CI surgery may be independent of age at CI and CI approach (unilateral or sequential bilateral). Long-term impacts on the vestibular function from CI surgery, as well as the chronic electrical stimulation to the cochlea, are still to be investigated.
format	article
author	Ruirui Guan Yanqi Wang Sasa Wu Bo Zhang Jingwu Sun Xiaotao Guo Jiaqiang Sun
author_facet	Ruirui Guan Yanqi Wang Sasa Wu Bo Zhang Jingwu Sun Xiaotao Guo Jiaqiang Sun
author_sort	Ruirui Guan
title	Vestibular Function in Children and Adults Before and After Unilateral or Sequential Bilateral Cochlear Implantation
title_short	Vestibular Function in Children and Adults Before and After Unilateral or Sequential Bilateral Cochlear Implantation
title_full	Vestibular Function in Children and Adults Before and After Unilateral or Sequential Bilateral Cochlear Implantation
title_fullStr	Vestibular Function in Children and Adults Before and After Unilateral or Sequential Bilateral Cochlear Implantation
title_full_unstemmed	Vestibular Function in Children and Adults Before and After Unilateral or Sequential Bilateral Cochlear Implantation
title_sort	vestibular function in children and adults before and after unilateral or sequential bilateral cochlear implantation
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/f40a98ef6e0243f8bdc3694ef1be942d
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Vestibular Function in Children and Adults Before and After Unilateral or Sequential Bilateral Cochlear Implantation

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