Calculates caloric targets for critically ill patients by phase. Acute phase (days 1–3): 20–25 kcal/kg/day (permissive underfeeding avoids hyperglycemia and overfeeding complications). Stable/recovery phase (day 4+): 25–30 kcal/kg/day. Avoid overfeeding (>35 kcal/kg): increases CO2 production, hepatic steatosis, and infection risk. Use actual body weight for non-obese; adjusted weight for BMI >30.
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