Correction Factor = 100 ÷Total Daily Insulin Dose = 1 unit of insulin will reduce the blood sugar so many mmol
How to work out a correction dose?
Calculating your insulin sensitivity factor
You need to calculate your insulin sensitivity factor to work out your correction doses. To do this you need to know how much insulin you usually take a day.
- Calculate your average Total Daily Dose (TDD) of insulin over about 4 days
- Divide 100 by your TDD
- This is the amount 1 unit of insulin will lower your blood glucose level. This is your insulin sensitivity factor.
You will need to check your insulin sensitivity factor whenever the amount of insulin you take changes, for example
- If your long acting insulin dose changes
- If your insulin to carbohydrate ratio changes
When to give a correction dose:
You can give a correction dose whenever you find a blood glucose level above target before a meal and above 9mmol/L 2hours after a meal.
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