Daily Nutrition Requirements

Total Kcal: 25kcal/kg/day
Distribution of calories: Of the 1g protein/kg/day (20% should be in the form of essential AA’s). 30% of calories should be from fat, and the rest should be from carbohydrates.
Question: 80 kg man gets 80g of protein in TPN with total calories of 2000/day.  How many calories from fat should he receive and what volume of 10% dextrose should he receive daily.
Answer: 30% of 2000 calories = 600 calories from fat.  That leaves 2000-600-320 = 1180 calories from carbs.  1180 /4 = 295 gms of dextrose, which means 2950cc of 10% dextrose solution

Kcals

Question: What are the Kcals of protein? carbs? fats?
Answer : Protein: 4 Kcal/gm; Carbs: 4Kcal/gm; Lipids: 9 Kcal/ml

Small/Large Bowel fuel supply

Question: What is the main fuel supply of the large and small bowel?
Answer: Colonocytes = short chain fatty acids; Small Bowel = Glutamine