Carbohydrate Delivery and Energy Provision in Clinical Settings

Calculation and Energy Provision

A patient receiving D5 at 150 mL/hr will receive 180 grams of carbohydrates in a 24-hour period, which delivers approximately 720 kcal of energy per day, representing partial nutritional support but is insufficient as sole nutrition 1
D5 contains 5 grams of dextrose per 100 mL, and at 150 mL/hr, a patient will receive 36 units of 100 mL, resulting in 180 grams of dextrose (carbohydrates) per 24 hours 1

The American Diabetes Association recommends that patients receiving 180 grams of carbohydrates per 24 hours would require approximately 12-18 units of insulin for nutritional coverage, using the guideline of 1 unit insulin per 10-15 grams of carbohydrate 1
Regular blood glucose monitoring every 1-2 hours is essential when administering dextrose-containing fluids to avoid both hypoglycemia and hyperglycemia 1, 2
Thiamine should be administered prior to starting glucose infusion to reduce the risk of Wernicke's encephalopathy when using dextrose as part of nutritional support 1

In nephrogenic diabetes insipidus, D5 delivers no renal osmotic load, making it preferable to salt-containing solutions which can worsen hypernatremia 3
For medication dilution, such as amphotericin B, D5 is commonly used as the vehicle, typically in 200 mL volumes 4, 5