Adequacy of protein and calorie delivery according to the expected calculated targets: a day-by-day assessment in critically ill patients undergoing enteral feeding.

Background: In critically ill patients requiring mechanical ventilation for longer than 48-72 h enteral nutrition (EN) should be started early. Because EN alone may be unable to reach the target nutritional requirement, supplemental parenteral nutrition (PN) should be administered. This study aimed at describing the daily rate of administered calories and proteins according to the expected calculated targets.