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- W2079807776 abstract "<i>Objective:</i> To identify the optimal test protocol to screen for hearing problems in newborns, an evaluation of three distortion product otoacoustic emission (DPOAE) protocols was conducted in neonates, from a well-baby nursery (WBN) and from a neonatal intensive care unit (NICU) and compared to the performance in newborns of a more standard protocol based on transient-evoked OAEs (TEOAEs). <i>Methods:</i> The DPOAE protocols used asymmetrical stimulus intensities (L<sub>1</sub> > L<sub>2</sub>) with a frequency ratio of 1.22, in the following format: (P1), L<sub>1</sub> = 60, L<sub>2</sub> = 50 dB SPL; (P2), L<sub>1</sub> = 65, L<sub>2</sub> = 55 dB SPL, and (P3), L<sub>1</sub> = 75, L<sub>2</sub> = 65 dB SPL. Linear TEOAE responses, evoked by click stimuli of 75 dB peSPL, were used as controls of normal cochlear function. Five frequencies at 1.5, 2.0, 3.0, 4.0 and 5.0 kHz were tested with a common commercially available macro-based software subroutine (Otodynamics Corp, ILO-92). The project evaluated the responses from 1200 WBN infants (average age 48 h) and 350 low-birth-weight NICU infants, all randomly selected. <i>Results:</i> Statistical analyses comparing the signal-to-noise ratios (S/N), at the predefined f<sub>2</sub> frequencies, indicated that the P1 and P2 DPOAE protocols generated similar responses. Significant S/N differences were observed in the P3 to P2 dataset comparisons. DPOAE scoring criteria were estimated from the P3 dataset using a one-sided, distribution-free confidence intervals. The scoring criteria for a ‘pass’ were estimated as a minimum S/N of 6.0, 7.0 and 6.0 dB at 2.0, 3.0 and 4.0 kHz, respectively. In terms of feasibility, the P3 protocol generated responses in 98% of the WBN and 94.8% of the NICU infants. <i>Conclusions:</i> All three DPOAE protocols demonstrated shorter time-recording requirements than the standard TEOAE test. The false-positive and false-negative rates for the NICU infants were estimated as 0.0028 and 0.003%, respectively." @default.
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- W2079807776 date "2008-07-29" @default.
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- W2079807776 title "Optimizing Otoacoustic Emission Protocols for a UNHS Program" @default.
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