Nutrition Flashcards
How many kilocalories/gram are in lipids?
9.1 kcal/gm
What is the respiratory quotient of lipids?
RQ = 0.7
How many kilocalories/gram are in protein?
4 kcal/gm
What is the respiratory quotient of protein?
RQ = 0.8
How many kilocalories/gram are in glucose?
3.7 kcal/gm
What is the respiratory quotient of glucose?
RQ = 1
How do you calculate respiratory quotient?
RQ = VCO2/VO2
What is the respiratory quotient of a healthy individual?
0.8 = that of protein
What is the respiratory quotient seen in starvation?
0.7 = that seen when lipids are the sole substrate
What is the respiratory quotient when a patient is overfeed?
1 = that seen when glucose is the sole substrate
-see net lipogenesis
What is the Harris-Benedict equation?
-calculations basal (daily) energy expenditure
-assumptions made by this equation
-heat production of basal metabolism
-at rest
-pt in fasted state
What is the basal energy expenditure for men?
66 + (13.7 x idw) + (5 x Ht) - (6.7 x age)
What is the basal energy expenditure for women?
66 + (9.6 x idw + (1.8 x Ht) - (4.7 x age)
What adjustments need to be made to calculate basal energy expenditure for pts w/ a fever?
BEE x 1.1 (for each C above normal)
What adjustments need to be made to calculate basal energy expenditure for pts under stress?
-mild = BEE x 1.2
-moderate = BEE x 1.4
-severe = BEE x 1.6
What is the half-life of serum albumin?
2-3 weeks
What is the half-life of transferrin?
8-10 days
What is the half-life of pre-albumin?
2-3 days
What percent of calories per day should be from carbs? Lipids?
-carbs = 70%
-lipids = 30%
What is the ideal nonprotein calories (NPC) : nitrogen ratio?
150 kcal NPC : 1gm N
How many grams of protein are needed to get 1gm of nitrogen?
6.25gm of protein to get 1gm N
What is the normal daily protein requirement?
0.8-1 gm/kg/day
What is the goal nitrogen balance per day?
+2 to +4 gm/day
How do you calculate nitrogen balance?
balance = ((protein intake/6.25) - (UUN +4)
-UUN = urinary urea nitrogen in 24hrs
