title: [Principles of the measurement of energy expenditure].
abstract: Numerous methods can be used to assess energy expenditure (EE). The Fick method allows an easy calculation of EE in critically ill patients with Swan-Ganz catheters. Indirect calorimetry can be performed using either closed circuit or open circuit techniques. The latter is accurate when the patient is breathing air or low-FiO2 gaz mixture, but inaccurate at high FiO2. The accuracy of instruments, the presence of a leak-free system and the mathematical manipulations are critical points. Calorimetric studies performed in patients receiving high FiO2 must be interpreted with caution.
authors.affiliation: Service d'anesthésiologie, Centre hospitalier et universitaire Vaudois, Lausanne.
authors.forename: D
authors.initials: D
authors.lastname: Thorin
authors.forename: R
authors.initials: R
authors.lastname: Chiolero
mesh_terms: D002151:Calorimetry / Q000379:methods; D004734:Energy Metabolism; D005260:Female; D006801:Humans; D008297:Male; D010101:Oxygen Consumption; D012016:Reference Values
vernacular_title: Principes de la mesure de la dépense énergétique.