Calories are calculated by catabolism of glucose (not proteins | Surgery videos & books

Calories are calculated by catabolism of glucose (not proteins).
Glucose:
• Amount of glucose in 20% glucose in 3000 ml of solution: 3000 x 20/100 = 600 gms
• 1 gm glucose on catabolism produces: 4.2 kcal
• 600 gms of glucose would produce: 600 x 4.2 = 2520 kcal
Protein:
• Percentage of protein in fluid: 4.25%
• Percentage of protein in 3000 ml of fluid: 3000 x 4.25/100 = 127.5 gms
• Calories required for the patient: 40x65 = 2600 kcal
• Proteins required for the patient: 2 x65 = 130 gms