Comparison of three indirect calorimetry devices and three methods of gas collection: a prospective observational study.

Background & Aims: Indirect calorimetry was performed for a long time with the DeltatracII(®) device (Datex, Finland), considered as a reference but no longer produced. This study aims at comparing the energy expenditure (EE), the volume of oxygen (VO2) and carbon dioxide (VCO2) measured by two new available indirect calorimeters, the QuarkRMR(®) (Cosmed, Italy) and the CCMexpress(®) (MedGraphic,USA), using three different methods of gas collection, with the DeltatracII(®) in healthy subjects.

Methods: Twenty-four healthy subjects (15 women and 9 men, age 53 ± 15 yrs, mean BMI 25.