Which statement is true about the environment for indirect calorimetry?

Which statement is true about the environment for indirect calorimetry?

• A. It can be performed in any environment
• B. It should be performed in a quiet, thermoneutral environment and routine care during the study should be avoided
• C. Routine care should be ongoing during measurement
• D. It requires a sterile operating room

Answer: (B)

Indirect calorimetry relies on steady gas exchange to estimate energy expenditure, so the environment must minimize factors that can alter metabolic rate. A quiet, thermoneutral setting helps keep the patient at rest and reduces the need for the body to expend energy on temperature regulation or coping with stress. Avoiding routine care during the measurement prevents disturbances that could change VO2 and VCO2 and, in turn, skew the results. This procedure is noninvasive and can be done at the patient’s bedside in a standard room; a sterile operating room is not required.

Indirect calorimetry relies on steady gas exchange to estimate energy expenditure, so the environment must minimize factors that can alter metabolic rate. A quiet, thermoneutral setting helps keep the patient at rest and reduces the need for the body to expend energy on temperature regulation or coping with stress. Avoiding routine care during the measurement prevents disturbances that could change VO2 and VCO2 and, in turn, skew the results. This procedure is noninvasive and can be done at the patient’s bedside in a standard room; a sterile operating room is not required.