Document Detail

Energy requirements and utilization of the low birthweight infant.
MedLine Citation:
PMID:  6961749     Owner:  NLM     Status:  MEDLINE    
Energy balance data have been obtained on 24 well grown immature (AGA) infants (mean BW 1554 g) and 16 small-for-gestational age (SGA) infants (mean BW 1210 g) using bomb calorimetry on milk and excreta over 7-10 days periods. Simultaneous measurements of energy expenditure were made, using a Kipp diaferometer. The main findings were: At any particular gestational age, digestible energy (the proportion of dietary energy absorbed) was similiar in AGA and SGA infants. Energy digestibility improved with maturation in all infants. Retained (metabolisable) energy was also similar in AGA and SGA infants, and averaged 65% of the intake at 30 weeks, 78% at 32 weeks, and 85% at 40 weeks post-conceptional age. Weight gain was linearly correlated with metabolisable energy in AGA infants, an energy cost of approximately 24 kJ/g (5.7 kcal). Maintenance energy requirement at zero weight gain in AGA infants was approximately 270 kJ/kg/d (64 kcal/kg/d). Resting energy expenditure was significantly higher in SGA than in AGA infants, but postprandial metabolism was less. In spite of these differences, rates of weight gain were similar in the two groups of infants. Energy expended in activity was probably less than 20% of the total energy turnover in both groups of infants. Energy balance was profoundly impaired by acidosis in all infants.
O G Brooke
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Acta paediatrica Scandinavica. Supplement     Volume:  296     ISSN:  0300-8843     ISO Abbreviation:  Acta Paediatr Scand Suppl     Publication Date:  1982  
Date Detail:
Created Date:  1983-03-11     Completed Date:  1983-03-11     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0173166     Medline TA:  Acta Paediatr Scand Suppl     Country:  SWEDEN    
Other Details:
Languages:  eng     Pagination:  67-70     Citation Subset:  IM    
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MeSH Terms
Calorimetry / methods
Energy Intake
Energy Metabolism*
Food, Fortified / analysis
Infant Food / analysis
Infant, Low Birth Weight*
Infant, Newborn
Infant, Premature
Infant, Small for Gestational Age
Nutritional Physiological Phenomena*
Nutritional Requirements*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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