Comparison of two methods, the thermodilution method of Fick and the Douglas bag method, in estimating the resting energy expenditure (REE)
1995
Bizani, M. | Koletsos, K. | Matamis, D. | Lagonidis, D. | Gerogianni, N. | Botsios, D. | Riggos, D.
Critically ill patients need appropriate nutritional support strictly correlated to their REE to avoid complications either from hypo or hyper alimentation. Resting Energy Expenditure (REE) in the I.C.U setting can be measured or calculated by several methods. The aim of our study was to compare two methods of indirect calorimetry. The REE calculated by the Fick equation (REET) and the traditional method of Douglas bag (REEi). Twelve ICU patients on mechanical ventilation were studied and the following results were obtained REET = 2295 +/- 552 Kcal/day and REEi = 2339 +/- 512 Kcal/day (mean +/- sd). A good correlation between the two methods showed by regression analysis. We conclude that the evaluation of REE using the thermodilution method of Fick is reliable in estimating the energy expenditure of critical ill patients.
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