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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
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.
ISSN: 1808-8694
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