Calculating Energy Needs

Calorie requirements are estimated to meet a patient's energy requirements, which are dependent on the patient's size, clinical condition, concurrent organ failure, and activity level. Determination of the appropriate energy prescription for a patient is crucial for meeting metabolic demands and helping to prevent erosion of lean body mass. Overzealous feeding is associated with significant risks, including difficulties with glucose control and other metabolic complications such as excessive carbon dioxide production. Common methods to estimate calorie requirements include simple weight-based

Table 5 Determination of energy needs


Need (kcal/kg)


20 (upper end IBW)


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