Contralateral Occlusion Test (COT)

Detalhes bibliográficos
Autor(a) principal: Reis, Luís Roque
Data de Publicação: 2019
Outros Autores: Castelhano, Luís, Correia, Filipe, Escada, Pedro
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://doi.org/10.1590/2317-1782/20192018058
Resumo: PURPOSE: This study aimed to evaluate the effects of complete external ear canal occlusion on hearing thresholds with aging. The goal was to decide which tuning fork is more appropriate to use for the contralateral occlusion test (COT), in individuals of different ages. METHODS: Forty-two normal hearing subjects between 21 and 67 years were divided into three age groups (20-30 years, 40-50 years, and 60-70 years). Participants underwent sound field audiometry tests with warble tones, with and without ear canal occlusion. Each ear was tested with the standard frequencies (250, 500, 1000, and 2000 Hz). The contralateral ear was suppressed by masking. RESULTS: Hearing thresholds showed an increase as the frequency increased from 20.85 dB (250 Hz, 20-30 years group) to 48 dB (2000 Hz, 60-70 years group). The threshold differences between occlusion and no occlusion conditions were statistically significant and increased ranging from 11.1 dB (250 Hz, 20-30 years group) to 32 dB (2000 Hz, 20-30 years group). We found statistically significant differences for the three age groups and for all evaluations except to 500 Hz difference and average difference. The mean hearing loss produced by occlusion at 500 Hz was approximately 19 dB. We found no statistically significant differences between right and left ears and gender for all measurements. CONCLUSION: We conclude that the use of the 512 Hz tuning fork is the most suitable for COT, and its use may allow clinicians to distinguish mild from moderate unilateral conductive hearing loss.
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spelling Contralateral Occlusion Test (COT)the effect of external ear canal occlusion with agingOtorhinolaryngologySpeech and HearingPURPOSE: This study aimed to evaluate the effects of complete external ear canal occlusion on hearing thresholds with aging. The goal was to decide which tuning fork is more appropriate to use for the contralateral occlusion test (COT), in individuals of different ages. METHODS: Forty-two normal hearing subjects between 21 and 67 years were divided into three age groups (20-30 years, 40-50 years, and 60-70 years). Participants underwent sound field audiometry tests with warble tones, with and without ear canal occlusion. Each ear was tested with the standard frequencies (250, 500, 1000, and 2000 Hz). The contralateral ear was suppressed by masking. RESULTS: Hearing thresholds showed an increase as the frequency increased from 20.85 dB (250 Hz, 20-30 years group) to 48 dB (2000 Hz, 60-70 years group). The threshold differences between occlusion and no occlusion conditions were statistically significant and increased ranging from 11.1 dB (250 Hz, 20-30 years group) to 32 dB (2000 Hz, 20-30 years group). We found statistically significant differences for the three age groups and for all evaluations except to 500 Hz difference and average difference. The mean hearing loss produced by occlusion at 500 Hz was approximately 19 dB. We found no statistically significant differences between right and left ears and gender for all measurements. CONCLUSION: We conclude that the use of the 512 Hz tuning fork is the most suitable for COT, and its use may allow clinicians to distinguish mild from moderate unilateral conductive hearing loss.NOVA Medical School|Faculdade de Ciências Médicas (NMS|FCM)RUNReis, Luís RoqueCastelhano, LuísCorreia, FilipeEscada, Pedro2019-05-20T22:20:54Z20192019-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://doi.org/10.1590/2317-1782/20192018058eng2317-1782PURE: 13244038http://www.scopus.com/inward/record.url?scp=85065333895&partnerID=8YFLogxKhttps://doi.org/10.1590/2317-1782/20192018058info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T04:33:16Zoai:run.unl.pt:10362/70289Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:35:04.206787Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Contralateral Occlusion Test (COT)
the effect of external ear canal occlusion with aging
title Contralateral Occlusion Test (COT)
spellingShingle Contralateral Occlusion Test (COT)
Reis, Luís Roque
Otorhinolaryngology
Speech and Hearing
title_short Contralateral Occlusion Test (COT)
title_full Contralateral Occlusion Test (COT)
title_fullStr Contralateral Occlusion Test (COT)
title_full_unstemmed Contralateral Occlusion Test (COT)
title_sort Contralateral Occlusion Test (COT)
author Reis, Luís Roque
author_facet Reis, Luís Roque
Castelhano, Luís
Correia, Filipe
Escada, Pedro
author_role author
author2 Castelhano, Luís
Correia, Filipe
Escada, Pedro
author2_role author
author
author
dc.contributor.none.fl_str_mv NOVA Medical School|Faculdade de Ciências Médicas (NMS|FCM)
RUN
dc.contributor.author.fl_str_mv Reis, Luís Roque
Castelhano, Luís
Correia, Filipe
Escada, Pedro
dc.subject.por.fl_str_mv Otorhinolaryngology
Speech and Hearing
topic Otorhinolaryngology
Speech and Hearing
description PURPOSE: This study aimed to evaluate the effects of complete external ear canal occlusion on hearing thresholds with aging. The goal was to decide which tuning fork is more appropriate to use for the contralateral occlusion test (COT), in individuals of different ages. METHODS: Forty-two normal hearing subjects between 21 and 67 years were divided into three age groups (20-30 years, 40-50 years, and 60-70 years). Participants underwent sound field audiometry tests with warble tones, with and without ear canal occlusion. Each ear was tested with the standard frequencies (250, 500, 1000, and 2000 Hz). The contralateral ear was suppressed by masking. RESULTS: Hearing thresholds showed an increase as the frequency increased from 20.85 dB (250 Hz, 20-30 years group) to 48 dB (2000 Hz, 60-70 years group). The threshold differences between occlusion and no occlusion conditions were statistically significant and increased ranging from 11.1 dB (250 Hz, 20-30 years group) to 32 dB (2000 Hz, 20-30 years group). We found statistically significant differences for the three age groups and for all evaluations except to 500 Hz difference and average difference. The mean hearing loss produced by occlusion at 500 Hz was approximately 19 dB. We found no statistically significant differences between right and left ears and gender for all measurements. CONCLUSION: We conclude that the use of the 512 Hz tuning fork is the most suitable for COT, and its use may allow clinicians to distinguish mild from moderate unilateral conductive hearing loss.
publishDate 2019
dc.date.none.fl_str_mv 2019-05-20T22:20:54Z
2019
2019-01-01T00:00:00Z
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dc.language.iso.fl_str_mv eng
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http://www.scopus.com/inward/record.url?scp=85065333895&partnerID=8YFLogxK
https://doi.org/10.1590/2317-1782/20192018058
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dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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