Insulin Correction Formula:
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The Insulin Correction Scale (also called insulin sensitivity factor) helps calculate how much 1 unit of rapid-acting insulin will lower your blood glucose. This calculator determines the correction dose needed to bring elevated blood glucose back to target range.
The calculator uses the formula:
Where:
Explanation: The equation calculates the units of insulin needed to correct high blood sugar based on your individual insulin sensitivity.
Details: Accurate correction doses help maintain optimal blood glucose control without causing hypoglycemia. Individual factors like time of day, activity level, and insulin sensitivity affect the actual dose needed.
Tips: Enter current blood glucose in mg/dL, your personal target glucose level, and your correction factor (as determined by your healthcare provider). All values must be positive numbers.
Q1: How is the correction factor determined?
A: Typically through trial and error with your healthcare provider, or using the "1800 rule" (1800/TDD) where TDD is your total daily insulin dose.
Q2: Should I round the dose?
A: Yes, typically to the nearest 0.5 or 1 unit depending on your insulin delivery method and healthcare provider's recommendations.
Q3: When should I not use a correction dose?
A: If your blood glucose is below target, before exercise, or if you've recently taken insulin that hasn't fully peaked yet.
Q4: Are there limitations to this calculation?
A: Yes, individual factors like stress, illness, or recent physical activity can affect insulin sensitivity.
Q5: Should I account for insulin on board?
A: Yes, for optimal control you should subtract any active insulin from the calculated correction dose.