Alteration of distortion product otoacoustic emission input/output functions in subjects with a previous history of middle ear dysfunction

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Citações na Scopus
7
Tipo de produção
article
Data de publicação
2012
DOI
Scopus
Web of Science
PubMed
Título da Revista
ISSN da Revista
Título do Volume
Editora
INT SCIENTIFIC LITERATURE, INC
Autores
HATZOPOULOS, Stavros
KOCHANEK, Krzysztof
SKARZYNSKI, Henryk
Citação
MEDICAL SCIENCE MONITOR, v.18, n.4, p.MT27-MT31, 2012
Projetos de Pesquisa
Unidades Organizacionais
Fascículo
Resumo
Background: The aim of this study was to investigate the effects of sub-clinical alterations on the amplitudes and slopes of the DPOAE input-output responses from subjects with previous history of middle ear dysfunction. Material/Methods: The study included 15 subjects with and 15 subjects without a history of otitis media in the last 10 years. All participants were assessed with acoustic immittance, pure-tone audiometry, and DPOAEs. For the later, I/O functions and I/O slopes were estimated at 1501, 2002, 3174, 4004 and 6384Hz. Results: No statistically significant differences were found between the 2 groups in terms of behavioral thresholds. The group with a previous history of middle ear dysfunction presented significantly lower mean DPOAE amplitudes at 2002, 3174 and 4004 Hz. In terms of DPOAE slopes, no statistically significant differences were observed at the tested frequencies, except at 3174 Hz. Conclusions: Middle ear pathologies can produce subclinical alterations that are undetectable with traditional pure-tone audiometry. The data from the present study show that reduced amplitude DPOAEs are associated with a previous history of middle ear complications. The corresponding DPOAE slopes were affected at only 1 tested frequency, suggesting that the cochlear non-linearity is preserved. Considering these results, it remains to be elucidated to what degree the DPOAE amplitude attenuation interferes with higher-order auditory tasks.
Palavras-chave
otoacoustic emissions, normal hearing, middle ear, middle ear dysfunction, distortion product otoacoustic emissions - Input/Output functions
URI
https://observatorio.fm.usp.br/handle/OPI/592
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Coleções
Artigos e Materiais de Revistas Científicas - FM/MFT
Artigos e Materiais de Revistas Científicas - HC/ICHC
Artigos e Materiais de Revistas Científicas - LIM/34