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

被引:53
作者
Kuhn, Pierre [1 ,2 ]
Zores, Claire [1 ,2 ]
Pebayle, Thierry [1 ]
Hoeft, Alain [1 ]
Langlet, Claire [2 ]
Escande, Benoit [2 ]
Astruc, Dominique [2 ]
Dufour, Andre [1 ]
机构
[1] Univ Strasbourg, Ctr Natl Rech Sci, Lab Imagerie & Neurosci Cognit, Strasbourg, France
[2] Ctr Hosp Univ Strasbourg, Hop Hautepierre, Serv Pediat 2, Strasbourg, France
关键词
NEONATAL INTENSIVE-CARE; NEAR-INFRARED SPECTROSCOPY; BIRTH-WEIGHT NEWBORNS; BRAIN-STEM RESPONSE; CEREBRAL OXYGENATION; TISSUE OXYGENATION; TERM; UNIT; DISCRIMINATION; STANDARDS;
D O I
10.1038/pr.2011.76
中图分类号
R72 [儿科学];
学科分类号
100202 ;
摘要
INTRODUCTION: 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. RESULTS: 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 occured 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. DISCUSSION: 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. METHODS: 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.
引用
收藏
页码:386 / 392
页数:7
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