A 70 kg critically ill patient is mechanically ventilated. Which method provides the most accurate measurement of energy expenditure in this patient?

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Multiple choice — select the best answer

AHarris-Benedict equation with stress factor 1.5
B25 kcal/kg body weight rule
CIndirect calorimetry
DFick equation using oxygen consumption

✓ Correct answer: C. Indirect calorimetry Indirect calorimetry directly measures oxygen consumption and carbon dioxide production to calculate energy expenditure and is the gold standard for critically ill patients, in whom predictive equations are especially inaccurate.

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Topic: Clinical Nutrition

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A 70 kg critically ill patient is mechanically ventilated. Which method provides the most accurate measurement of energy expenditure in this patient?

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