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Cardiac responses to mild hypoxic hypercapnia in newborn babies: No effect of sleep position
Author(s) -
Naidoo M,
Colditz Pb,
Browne Ca,
Dunster Kr
Publication year - 2000
Publication title -
journal of paediatrics and child health
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.631
H-Index - 76
eISSN - 1440-1754
pISSN - 1034-4810
DOI - 10.1046/j.1440-1754.2000.00542.x
Subject(s) - medicine , hypercapnia , supine position , heart rate , anesthesia , cardiology , hypoxia (environmental) , blood pressure , acidosis , oxygen , chemistry , organic chemistry
Objective : To evaluate whether cardiac responses to a level of hypoxic hypercapnia that may be observed in rebreathing studies are altered with infant sleep position. Methodology : Eighteen healthy term infants (< 5‐days‐old) were studied. Heart rate (HR) and HR variability were monitored during air breathing and during 3 min exposure to a mixture of 15% O 2 /3% CO 2 in both the prone and supine positions. Power spectral analysis of HR was performed. Results : Heart rate was the only measured variable to be significantly changed in response to 15% O 2 /3% CO 2 . Hypoxic hypercapnia elicited no significant responses in power spectral HR variables. There was no effect of sleeping position on any of the measured variables. Conclusions : There are no significant differences in cardiac responses to mild hypoxic hypercapnia between sleep positions and power spectral indices of the autonomic control of HR are not altered by sleep position in newborn babies.