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Title: | Efferent inhibition of otoacoustic emissions in preterm neonates |
Other Titles: | Inibição eferente das emissões otoacústicas em neonatos prematuros |
Authors: | Durante, Alessandra Spada Carvallo, Renata Mota Mamede Sanches, Seisse Gabriela Gandolfi Ibidi, Silvia Maria Soares, Jordana Costa |
Keywords: | Premature infant Hearing Newborn infant Spontaneous otoacoustic emissions Auditory pathways |
Issue Date: | Oct-2015 |
Publisher: | Brazilian Journal of Otorhinolaryngology Brazilian Association of Otolaryngology and Cervicofacial Surgery |
Citation: | Durante AS, Carvallo RM, Sanches SG, Ibidi SM, Soares JC. Efferent inhibition of otoacoustic emissions in preterm neonates. Braz J Otorhinolaryngol. 2015 Sep-Oct;81(5):491-7. |
Abstract: | INTRODUCTION: Abnormalities in auditory function of newborns may occur not only because of preterm birth, but also from the use of medications and from diseases related to prematurity. OBJECTIVE: To analyze the inhibitory effect from stimulation of the olivocochlear efferent system on transient evoked otoacoustic emissions in preterm neonates, comparing these data with those from full-term neonates. METHODS: This was a prospective, cross-sectional, contemporary cohort study with 125 neonates, pooled into two groups: full-term (72 full-term neonates, 36 females and 36 males, born at 37-41 weeks of gestational age); and preterm (53 neonates, 28 males and 25 females, born at ≤36 weeks of gestational age, evaluated at the corrected gestational age of 37-41 weeks). Otoacoustic emissions were recorded using linear and nonlinear click-evoked stimuli, with and without contralateral stimulation. RESULTS: The inhibitory effect of the efferent pathway in otoacoustic emissions was different (p=0.012) between groups, and a mean reduction of 1.48dB SPL in full-term births and of 1.02dB SPL in preterm births was observed for the non-linear click-evoked stimulus. CONCLUSION: The results suggest a reduced inhibitory effect of the olivocochlear efferent system on otoacoustic emissions in preterm neonates. |
URI: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1808-86942015000500491 http://repositorio.fcmsantacasasp.edu.br/jspui/handle/FCMSCSP/53 |
ISSN: | 1808-8694 |
Appears in Collections: | Artigos |
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File | Description | Size | Format | |
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Efferent inhibition of otoacoustic emissions in preterm neonates.pdf | Acesso aberto | 551.15 kB | Adobe PDF | View/Open |
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