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Role of Cochlear Microphonic in Newborn Hearing Test / 대한이비인후과학회지
Korean Journal of Otolaryngology - Head and Neck Surgery ; : 389-394, 2015.
Artigo em Coreano | WPRIM | ID: wpr-656287
ABSTRACT
BACKGROUND AND

OBJECTIVES:

Cochlear microphonic (CM) is an electrical potential generated by outer hair cells in response to acoustic stimulation. The aim of this study is to evaluate the significance of CM in neonatal hearing loss. SUBJECTS AND

METHOD:

From April 2013 to April 2014, 64 neonates hospitalized in neonatal intensive care unit were enrolled. Subjects underwent transient evoked otoacoustic emission (TEOAE), auditory brain stem response (ABR) and CM. We analyzed the results of hearing tests and the correlation between CM and the other test modalities.

RESULTS:

Ninety two ears showed normal ABR waves whereas the other 36 ears had abnormal ABR. There were two neonates who were suspected of auditory neuropathy because of the presence of TEOAE and CM. Among 14 ears who showed abnormal OAE results, 12 ears (86%) were identified as having CM. The amplitudes of CMs were correlated with the reproducibility of TEOAE (p<0.005). Between the ears with positive TEOAE and others with negative TEOAE, the amplitudes of CMs were significantly different (p<0.005).

CONCLUSION:

Many ears were identified with the presence of CM without TEOAE response because of the the vulnerability of OAE from middle ear status and environment. We suppose that CM might provide information on outer hair cell function to complement the OAE in neonatal hearing test.
Assuntos

Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Estimulação Acústica / Proteínas do Sistema Complemento / Terapia Intensiva Neonatal / Potenciais Evocados Auditivos do Tronco Encefálico / Triagem Neonatal / Potenciais Microfônicos da Cóclea / Orelha / Orelha Média / Cabelo / Perda Auditiva Limite: Humanos / Recém-Nascido Idioma: Coreano Revista: Korean Journal of Otolaryngology - Head and Neck Surgery Ano de publicação: 2015 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Estimulação Acústica / Proteínas do Sistema Complemento / Terapia Intensiva Neonatal / Potenciais Evocados Auditivos do Tronco Encefálico / Triagem Neonatal / Potenciais Microfônicos da Cóclea / Orelha / Orelha Média / Cabelo / Perda Auditiva Limite: Humanos / Recém-Nascido Idioma: Coreano Revista: Korean Journal of Otolaryngology - Head and Neck Surgery Ano de publicação: 2015 Tipo de documento: Artigo