Comparaison entre les dépenses énergétiques mesurées par Deltatrac II® et celles mesurées par l’E-COVX® chez des patients agressés : étude prospective observationnelle

Objectives. The energy intake to provide to critically ill subjects is a complex issue and the indirect calorimetry (IC) is the reference method to determine it. The energy expenditure (EE) measured by IC, with the Deltatrac II (R), were compared to values measured by a new module coupled to a ventilator: the E-COVX (R). Material and methods. ICU patients on mechanical ventilation underwent measurements, simultaneously connected during 20 min to the ventilator. VO2 consumption, VCO2 production, respiratory quotient (RQ) and EE were recorded. These measures were made successively at random and during a same period. Statistics' Student t-tests were realized to compare the results. Bland and Altman graphs were also made. Results. Forty-four patients (29 males, aged 60 +/- 15 years, with a BMI 25.9 +/- 5.3 kg/m(2)) were included. For the Deltatrac II (R),VO2 was 244 +/- 69 mL/min, VCO2 189 +/- 47 mL/min, RQ 0.79 +/- 0.08 and EE 1648 +/- 457 kcal/day. VO2, VCO2, and EE differed significantly between the two devices despite similar RQ. By our results, the E-COVX (R) module significantly overestimates the EE. Conclusion. -E-COVX (R) is a convenient device to measure EE in ICU. However, this new module overestimates EE (234 kcal/day) compared with Deltatrac II (R), gold standard method to measure EE. Significant improvements of this news devices seem mandatory before recommending their clinical use in ICU. (C) 2016 Association pour le developpement de la recherche en nutrition (ADREN). Published by Elsevier Masson SAS. All rights reserved.