Abstract
ABSTRACT. We performed continuous indirect calorimetry for 24 h on nine occasions in small premature infants. Oxygen consumption, carbon dioxide production, respiratory quotient, and energy expenditure were calculated for each 2-h period. The mean energy expenditure during the first 6 h was within 6.5% of the mean for the whole 24-h period in all but one case. The mean error in estimating total daily energy expenditure from 6-h measurements was 0.9%. Because positive and negative errors tend to offset each other, we also calculated the mean absolute error, which was 5.6%. The mean coefficient of variation in energy expenditure among the 2-h periods was 11.0%. The mean coefficients of variation in oxygen consumption, carbon dioxide production, and respiratory quotient were 12.8, 9.9, and 14.1%, respectively. Total daily energy expenditure of small premature infants can be estimated from measurements as short as 6 h with sufficient accuracy for most purposes.
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Bell, E., Rios, G. & Wilmoth, P. Estimation of 24-Hour Energy Expenditure from Shorter Measurement Periods in Premature Infants. Pediatr Res 20, 646–649 (1986). https://doi.org/10.1203/00006450-198607000-00013
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DOI: https://doi.org/10.1203/00006450-198607000-00013