This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by White, M. S. Articles by McEniery, J. A. Search for Related Content PubMed PubMed Citation Articles by White, M. S. Articles by McEniery, J. A. Social Bookmarking                         What's this?

Energy Expenditure Measurements in Ventilated Critically III Children: Within- and Between-Day Variability

Children's Nutrition Research Centre, Royal Children's Hospital, Department of Paediatrics and Child Health, University of Queensland, Australia

Ross W. Shepherd, MD, FRACP

Children's Nutrition Research Centre, Royal Children's Hospital, Department of Paediatrics and Child Health, University of Queensland, Australia

Julie A. McEniery, MBBS, FRACP

Intensive Care Unit, Royal Children's Hospital, Brisbane, Australia

Background: Energy expenditure measurement (EEM) by indirect calorimetry is used as a research and clinical tool in pediatric intensive care units. The aims of the study were to determine if a 30-minute EEM is representative of a 24-hour EEM (within-day variation); to determine if there is any diurnal variation during the 24-hour period of EEM; and to determine if there is a clinically significant between day variation of EEMs. Methods: To determine within-day variation, energy expenditure was measured for a period of 24 hours for each subject (n = 11). The 24-hour period was then divided into 30-minute periods. The 30-minute means were compared with the 24-hour means. To determine between-day variation, EEMs were made daily for 30 minutes. Results: In the within-day study, the overall mean percent coefficient of variation of the 30-minute measurements was 7.2% ± 4.5%. There was no significant difference between the 30-minute means and the 24-hour means for each patient (p < .691). In 8 subjects the 30-minute means did not differ from the 24-hour mean by more than 20%. No diurnal variation was observed. The mean percent variation of between day EEM was 21% ± 16%; the range was 1% to 69%. Conclusion: In critically ill ventilated children, clinically relevant within-day variations in EEM are uncommon and a single 30-minute EEM gives an acceptable guide to the level of nutrition support required. Between-day variations can, however, be large and daily EEMs are required. (Journal of Parenteral and Enteral Nutrition 23:300-304, 1999)

Journal of Parenteral and Enteral Nutrition, Vol. 23, No. 5, 300-304 (1999)
DOI: 10.1177/0148607199023005300


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?

This article has been cited by other articles:

				N. M. Mehta, C. Compher, and A.S.P.E.N. Board of Directors A.S.P.E.N. Clinical Guidelines: Nutrition Support of the Critically Ill Child JPEN J Parenter Enteral Nutr, May 1, 2009; 33(3): 260 - 276. [Full Text] [PDF]

				H. E. Skillman and P. E. Wischmeyer Nutrition Therapy in Critically Ill Infants and Children JPEN J Parenter Enteral Nutr, September 1, 2008; 32(5): 520 - 534. [Abstract] [Full Text] [PDF]

				J. Krenitsky Adjusted Body Weight, Pro: Evidence to Support the Use of Adjusted Body Weight in Calculating Calorie Requirements Nutr Clin Pract, August 1, 2005; 20(4): 468 - 473. [Abstract] [Full Text] [PDF]