4.2 Review

Indirect calorimetry: should it be part of routine care or only used in specific situations?

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LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/MCO.0000000000000895

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critical illness; energy expenditure; indirect calorimetry; metabolism

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Indirect calorimetry is increasingly recommended in the ICU to guide energy delivery. This review provides a critical overview of current literature to support these recommendations. Currently, there is insufficient evidence to prove a mortality benefit from IC-guided energy delivery.
Purpose of reviewIndirect calorimetry (IC) is increasingly recommended to guide energy delivery in the ICU. This review aims to provide a critical overview of current literature in support of these recommendations.Recent findingsThere is insufficient evidence to ascertain a mortality benefit from IC-guided energy delivery. However, large variations in energy expenditure during critical illness pose a risk for significant under- and overfeeding if IC is not routinely used.Even in the absence of demonstrable clinical benefits, there is a strong physiological rationale in favor of performing IC. Measurements can be prioritized in complex patients and should be repeated during prolonged ICU stay.

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