Infants born very preterm react to variations of the acoustic environment in their incubator from a minimum signal-to-noise ratio threshold of 5 to 10 dBA
| Autor: | Pierre Kuhn, André Dufour, Dominique Astruc, Claire Langlet, B Escande, Alain Hoeft, Thierry Pebayle, Claire Zores |
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| Rok vydání: | 2012 |
| Předmět: |
Male
Pediatrics medicine.medical_specialty Time Factors Acoustics Video Recording Blood Pressure Environment Signal-To-Noise Ratio Signal-to-noise ratio Hearing Heart Rate Pressure otorhinolaryngologic diseases medicine Birth Weight Humans Mathematics Behavior Infant Newborn Infant Incubator Respiration Artificial Oxygen Very preterm Sound Pediatrics Perinatology and Child Health Intensive Care Neonatal Female Noise Infant Premature |
| Zdroj: | Pediatric Research. 71:386-392 |
| ISSN: | 1530-0447 0031-3998 |
| DOI: | 10.1038/pr.2011.76 |
| Popis: | Very early preterm infants (VPIs) are exposed to unpredictable noise in neonatal intensive care units. Their ability to perceive moderate acoustic environmental changes has not been fully investigated.Physiological values of the 598 isolated sound peaks (SPs) that were 5-10 and 10-15 dB slow-response A (dBA) above background noise levels and that occurred during infants' sleep varied significantly, indicating that VPIs detect them. Exposure to 10-15 dBA SPs during active sleep significantly increased mean heart rate and decreased mean respiratory rate and mean systemic and cerebral oxygen saturations relative to baseline.VPIs are sensitive to changes in their nosocomial acoustic environment, with a minimal signal-to-noise ratio (SNR) threshold of 5-10 dBA. These acoustic changes can alter their well-being.In this observational study, we evaluated their differential auditory sensitivity to sound-pressure level (SPL) increments below 70-75 dBA equivalent continuous level in their incubators. Environmental (SPL and audio recording), physiological, cerebral, and behavioral data were prospectively collected over 10 h in 26 VPIs (GA 28 (26-31) wk). SPs emerging from background noise levels were identified and newborns' arousal states at the time of SPs were determined. Changes in parameters were compared over 5-s periods between baseline and the 40 s following the SPs depending on their SNR thresholds above background noise. |
| Databáze: | OpenAIRE |
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