Document Detail

Day-to-day energy expenditure variability in low birth weight neonates.
MedLine Citation:
PMID:  3099256     Owner:  NLM     Status:  MEDLINE    
We estimated the metabolic rate of 13 low birth weight infants over a 9-day period, using indirect calorimetry in conjunction with serial measurements of oxygen consumption, carbon dioxide production, and total urinary nitrogen excretion. The mean percent error for oxygen consumption and carbon dioxide production measurements (determined by alcohol combustion experiments) assignable to the open-circuit system was 0.4 and 3.8%, respectively. Error in the total urinary nitrogen excretion measurement was less than 1% by the Kjeldahl technique. In the clinical setting, however, the range of deviation of measured oxygen consumption, carbon dioxide production and total urinary nitrogen excretion was +/- 12, 12, and 15% of the mean value respectively for an individual patient under standardized controlled conditions. The variability of metabolic rate between infants may be as much as 76%. Factors that had a small effect on metabolic rate were difficult to detect because of the variability inherent in the short-term measurement of metabolic rate. It was virtually impossible to control the sources of variation in the resting metabolism of low birth weight neonates over extended experimental periods. Day-to-day variations in resting energy expenditure may explain, in part, the widely different growth rates of premature infants receiving similar caloric intakes.
K H Marks; E E Nardis; J A Derr
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Pediatric research     Volume:  21     ISSN:  0031-3998     ISO Abbreviation:  Pediatr. Res.     Publication Date:  1987 Jan 
Date Detail:
Created Date:  1987-02-19     Completed Date:  1987-02-19     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0100714     Medline TA:  Pediatr Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  66-71     Citation Subset:  IM    
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MeSH Terms
Carbon Dioxide / biosynthesis
Circadian Rhythm*
Energy Metabolism*
Infant, Low Birth Weight*
Infant, Newborn
Oxygen Consumption
Grant Support
Reg. No./Substance:
124-38-9/Carbon Dioxide

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