Journal article
Effect of Body Position on Energy Expenditure of Preterm Infants as Determined by Simultaneous Direct and Indirect Calorimetry
American journal of perinatology, Vol.34(5), pp.493-498
04/2017
DOI: 10.1055/s-0036-1593476
PMCID: PMC5367928
PMID: 27716862
Abstract
Indirect calorimetry is the standard method for estimating energy expenditure in clinical research. Few studies have evaluated indirect calorimetry in infants by comparing it with simultaneous direct calorimetry. Our purpose was (1) to compare the energy expenditure of preterm infants determined by these two methods, direct calorimetry and indirect calorimetry; and (2) to examine the effect of body position, supine or prone, on energy expenditure.
We measured energy expenditure by simultaneous direct (heat loss by gradient-layer calorimeter corrected for heat storage) and indirect calorimetry (whole-body oxygen consumption and carbon dioxide production) in 15 growing preterm infants during two consecutive interfeeding intervals, once in the supine position and once in the prone position.
The mean energy expenditure for all measurements in both positions did not differ significantly by the method used: 2.82 (standard deviation [SD] 0.42) kcal/kg/h by direct calorimetry and 2.78 (SD 0.48) kcal/kg/h by indirect calorimetry. The energy expenditure was significantly lower, by 10%, in the prone than in the supine position, whether examined by direct calorimetry (2.67 vs. 2.97 kcal/kg/h,
< 0.001) or indirect calorimetry (2.64 vs. 2.92 kcal/kg/h,
= 0.017).
Direct calorimetry and indirect calorimetry gave similar estimates of energy expenditure. Energy expenditure was 10% lower in the prone position than in the supine position.
Details
- Title: Subtitle
- Effect of Body Position on Energy Expenditure of Preterm Infants as Determined by Simultaneous Direct and Indirect Calorimetry
- Creators
- Edward F Bell - University of IowaKaren J Johnson - University of IowaEdwin L Dove - University of Iowa
- Resource Type
- Journal article
- Publication Details
- American journal of perinatology, Vol.34(5), pp.493-498
- DOI
- 10.1055/s-0036-1593476
- PMID
- 27716862
- PMCID
- PMC5367928
- NLM abbreviation
- Am J Perinatol
- ISSN
- 0735-1631
- eISSN
- 1098-8785
- Grant note
- M01 RR000059 / NCRR NIH HHS R01 DC016974 / NIDCD NIH HHS
- Language
- English
- Date published
- 04/2017
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Stead Family Department of Pediatrics; Neonatology
- Record Identifier
- 9984353839202771
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