Required Formulas for Diabetes

Question 1

Initiating Basal-Bolus Insulin in Type 1 Diabetes

Answer 1

1. Calculate total daily dose using TBW: 0.5 units/kg/day.
2. Divide into 1/2 basal & 1/2 rapid-acting. If using NPH/R, use 2/3 & 1/3.
3. Split rapid-acting among meals.

Question 2

Insulin-to-Carbohydrate Ratio for Regular Insulin

Answer 2

450/TDD = grams of carbohydrate covered by 1 unit of regular insulin

TTD = total daily dose

Question 3

Insulin-to-Carbohydrate Ratio for Rapid-Acting Insulin

Answer 3

500/TDD = grams of carbohydrate covered by 1 unit of rapid-acting insulin

TTD = total daily dose

Question 4

Correction Factor for Regular Insulin

Answer 4

1500/TDD = correction factor for 1 unit of regular insulin

TTD = total daily dose

Question 5

Correction Factor for Rapid-Acting Insulin

Answer 5

1800/TDD = correction factor for 1 unit of rapid-acting insulin

TTD = total daily dose

Question 6

Correction Dose

Answer 6

(BG now - target BG)/correction factor

Question 7

What are the exceptions for

Insulin Conversion

Answer 7

• NPH dosed BID → glargine dosed daily: use 80% of NPH dose
• Toujeo → other forms of glargine or detemir: use 80% of Toujeo dose