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Critical Care
Published in: Critical Care 1/2016

Open Access 01-12-2016 | Letter

VCO2 calorimetry is a convenient method for improved assessment of energy expenditure in the intensive care unit

Authors: Ulrike Pielmeier, Steen Andreassen

Published in: Critical Care | Issue 1/2016

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Excerpt

In their interesting article, Stapel et al. [1] suggested the use of carbon dioxide production (VCO2) calorimetry with energy expenditure (EE; kcal/day), calculated as 8.19 × VCO2 (ml/min), where VCO2 is provided by the built-in capnometer of the mechanical ventilator. This calculation on average overestimated EE by 7.7 % compared to indirect calorimetry (IC) with a standard deviation (SD) of ±8.4 %. This is within the ±10 % limits of acceptance used in many studies [2] and, more importantly, is an improvement relative to calculation of EE by predictive equations from the patient’s anthropometric data. The equation used by Stapel et al. incorporated a cohort respiratory quotient (RQ) of 0.86. …
Literature
1.
Stapel SN, de Grooth HJS, Alimohamad H, Elbers PW, Girbes AR, Weijs PJ, et al. Ventilator-derived carbon dioxide production to assess energy expenditure in critically ill patients: proof of concept. Crit Care. 2015;19:370.CrossRefPubMedPubMedCentral
2.
Tatucu-Babet OA, Ridley EJ, Tierney AC. Prevalence of underprescription or overprescription of energy needs in critically ill mechanically ventilated adults as determined by indirect calorimetry: a systematic literature review. J Parenter Enteral Nutr. 2016;40(2):212–25.CrossRef
3.
4.
Rousing ML, Hahn Pedersen MH, Andreassen S, Pielmeier U, Preiser JC. Energy expenditure in critically ill patients estimated by population based equations, indirect calorimetry and CO2-based indirect calorimetry. Ann Intensive Care. 2016;6(1):16.CrossRefPubMedPubMedCentral
5.
McClave SA, Lowen CC, Kleber MJ, McConnell JW, et al. Clinical use of the respiratory quotient obtained from indirect calorimetry. J Parenter Enteral Nutr. 2003;27(1):21–6.CrossRef
6.
Sundstrom Rehal M, Fiskaare E, Tjader I, et al. Measuring energy expenditure in the intensive care unit: a comparison of indirect calorimetry by E-sCOVX and Quark RMR with Deltatrac II in mechanically ventilated critically ill patients. Crit Care. 2016;20:54.CrossRef
Metadata
Title
VCO2 calorimetry is a convenient method for improved assessment of energy expenditure in the intensive care unit
Authors
Ulrike Pielmeier
Steen Andreassen
Publication date
01-12-2016
Publisher
BioMed Central
Published in
Critical Care / Issue 1/2016
Electronic ISSN: 1364-8535
DOI
https://doi.org/10.1186/s13054-016-1397-z

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