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Pulse Oximetry Saturations in the First 6 Hours of Life in Normal Term Infants

Division of Newborn Medicine, Jack and Lucy Clark Department of Pediatrics, Mount Sinai School of Medicine, New York, NY; Division of Neonatology at the Children's Regional Hospital at Cooper, One Cooper Plaza, Sarah Cooper Building, 2nd floor, Camden, NJ 08103

Ian R. Holzman, MD

Josiah F. Wedgwood, MD, PhD

Division of Newborn Medicine, Jack and Lucy Clark Department of Pediatrics, Mount Sinai School of Medicine, New York, NY

The pulse oximetry saturation values and the average percentage of time that normal newborns spend at different saturation ranges in the first 6 hours of life were determined in a cross-sectional study. Pulse oximetry saturation values were measured for a single 20-minute period in 101 normal term newborns between 20 minutes and 6 hours of age. The 25th percentile saturation values in the first postnatal hour (range 91%-100%) were lower than those from the second postnatal hour (range 96%-100%) onward. There was no significant difference between the 50th percentile (range 96%-100%) and the 75th percentile (range 97%-100%) saturation values in all postnatal hours. The babies spent a majority of time with saturations?96% in all postnatal hours. A newborn more than 20 minutes old who does not achieve a pulse oximetry saturation value of 96% over several minutes of observation may need evaluation or continuous monitoring.

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