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  Contents > Previous page > Article detail print Order
o Issue N# 3 - 2001 o

PAEDIATRICS

Auditory screening in neonates : evoked oto-acoustic emissions or acoustic distortion product ?


Authors : S. Roman, M. Mondain, J.-M. Triglia, A. Uziel (Marseille, Montpellier)

Ref. : Rev Laryngol Otol Rhinol. 2001;122,3:155-158.

Article published in french
Downloadable PDF document french



Summary : Transiently evoked otoacoustic emissions (TEOAE) allows an auditory screening in neonates above 30 dB and between 2 kHz to 4 kHz. Another type of otoacoustic emissions, the distortion product (DP) allows a similar screening and provides more specific frequency information over a broader frequency range, including frequencies below 2 kHz and above 4 kHz. The goal of this study was to determine 1) the interest of distortion product in comparison with TEOAE in a auditory screening program in neonates; 2) The predictive value of information extracted from otoacoustic emissions recordings, on frequential parameters of distortion product (DP). In this prospective study, TEOAE and DP were successively recorded in 20 neonates (34 ears) with risk of hearing impairment, using the ILO92 software and hardware. When TEOAs were no detectable (9/34), the DPs were no detectable neither (10/34). When TEOAs were detectable, the Dps carried more specific frequency information above 1 kHz in 52 to 80 % of the patients. DP amplitudes have been quantitatively correlated with TEOA energy bands. Correlations between DP and TEOA have been objectivized for DP2.5 and DP4 with OE2, and for DP4 and DP6 with OE5. The correlation predictive value was above 85 %. In conclusion, this study demonstrated that analysis of TEOA spectrums procures frequential information without requiring DP recordings.

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