AI Article Synopsis
- The research investigates the suppression effect of otoacoustic emissions triggered by a transient stimulus in both term and preterm infants, aiming to establish a standard for clinical application.
- The study involved 40 infants aged from five days to four months, with assessments made by comparing emissions in quiet and during noise exposure at specific sound pressure levels.
- Results showed that all infants exhibited a suppression effect regardless of group, with an average suppression of 0.85 dB, surpassing the minimum clinical criterion of 0.20 dB.
Article Abstract
Purpose: This research aims at verifying the occurrence and magnitude of suppression effect of otoacoustic emissions evoked by transient stimulus in term and preterm infants, setting a benchmark for clinical use.
Methods: The study sample consisted of 40 infants, with a rage of age from five days to four months, without any risk indicators for hearing loss and otoacoustic emissions present at birth: the 20 term and 20 preterm infants spent more than five days in the Neonatal Intensive Care Unit. Linear click was presented at 65 dB Sound Pressure Level, in blocks of 15 seconds without noise, and with contralateral noise at 60 dB Sound Pressure Level. The reduced response in the presence of noise indicates positive suppression effect. Mean values of suppression were established and the comparison between the groups was analyzed statistically.
Results: Suppression occurred in 100% of the children and did not vary as a function of ear side and between the groups.
Conclusion: All children presented suppression regardless of the group. The average suppression obtained on the total population was 0.85 dB. The minimum recommended criterion for clinical use was a reduction of 0.20 dB in the overall response.
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| http://dx.doi.org/10.1590/2317-1782/20162015153 | DOI Listing |
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