[Principles of the measurement of energy expenditure].
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.
Thorin
D
D
Service d'anesthésiologie, Centre hospitalier et universitaire Vaudois, Lausanne.
Chiolero
R
R
D002151:Calorimetry / Q000379:methods; D004734:Energy Metabolism; D005260:Female; D006801:Humans; D008297:Male; D010101:Oxygen Consumption; D012016:Reference Values
Principes de la mesure de la dépense énergétique.