Abstract
To compare the efficacy of different methods of neonatal thermal protection, oxygen consumption (Vo2) and deep rectal temperature (Tr) were followed for the first 3 hours of life. Vo2 was measured using a calibrated open circuit system. Groups of 15 vigorous mature infants were studied in 4 thermal environments: 1) swaddled with a blanket in an open bassinet at room temperature (25°C) 2) swaddled in a double-layer plastic bag with head shield and placed in a bassinet at room temperature 3) placed nude under a radiant heater (750 watts at 80 cm), and 4) placed in a double-layer plastic swaddler with head hood under the radiant heater. At 30 minutes of age the Tr fell least in plastic swaddled infants under a heater (36.8°C±.30) and most in babies under the heater alone (36.2°±2.6); Vo2 was least for swaddled infants under a heater (8.0 cc/kg/min±.3). At 3 hrs swaddled infants under a heater had the highest Tr (37.5±.12) and lowest Vo2 (5.75±.25). Over the observation period (3 hrs) infants swaddled in plastic under a radiant heater consumed less (8%) oxygen than the mean in the other groups and best maintained deep temperature.
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