What does indirect calorimetry measure?
What will be an ideal response?
Indirect calorimetry is the most accurate method of measuring resting energy expenditure/resting metabolic rate (other than direct calorimetry, which is not applicable to many settings including the clinical setting). It is based on the fact that energy expenditure is proportional to the body's oxygen consumption and carbon dioxide production. Indirect calorimetry is performed by using a metabolic cart at bedside that measures the amount of oxygen consumed and carbon dioxide expelled by the patient (VO2 and VCO2). Using these values, in addition to the patient's basic anthropometric measurements, allow for more accurate energy requirements to be calculated.
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