ICU Nutrition Estimator

Estimates resting energy expenditure (calories) and protein requirements for critically ill patients using predictive equations.

kg

Actual body weight (use adjusted BW for obese)

cm

Height in centimeters

years

Age in years

Sex for BMR calculations

Formula for calculating resting energy expenditure

Stress factor multiplier for critical illness

Activity multiplier

Enter patient data to estimate nutrition needs

References

  1. American Society for Parenteral and Enteral Nutrition (ASPEN) guidelines - ASPEN / Journal of Parenteral and Enteral Nutrition
  2. Harris-Benedict and Mifflin-St Jeor equations comparison - PMC / Nutrition in Clinical Practice

Clinical Notes & Warnings

  • All predictive equations have significant error in critically ill patients.
  • Indirect calorimetry (metabolic cart) is the gold standard for ICU.
  • Overfeeding (especially carbohydrates) increases CO2 production and risk of hyperglycemia.
  • Protein intake should not be reduced for renal or hepatic failure without indication.
  • Use ideal body weight (IBW) for obese patients.

Penn State equation uses minute ventilation (Ve) and maximum temperature. Ireton-Jones is used for ventilated patients. NUTRIC score identifies high-risk patients for benefit from early nutrition.