Volume Correction Factor Formula:
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The Volume Correction Factor (also known as insulin sensitivity factor) estimates how much 1 unit of rapid-acting insulin will lower blood glucose. It's calculated from the total daily dose (TDD) of insulin.
The calculator uses the formula:
Where:
Explanation: The formula estimates that 1 unit of insulin will lower blood glucose by (1800/TDD) mg/dL.
Details: The correction factor is essential for calculating insulin doses to correct high blood glucose levels in diabetes management.
Tips: Enter your total daily dose of insulin in units. The value must be greater than 0.
Q1: Why is 1800 used in the formula?
A: 1800 is an empirically derived constant that represents the average glucose-lowering effect of insulin in mg/dL per unit.
Q2: What is a typical correction factor?
A: For most adults, it ranges from 30-100 mg/dL per unit, depending on insulin sensitivity and TDD.
Q3: When should I recalculate my correction factor?
A: Recalculate whenever your TDD changes significantly (by 10% or more) or if your insulin sensitivity changes.
Q4: Are there alternative formulas?
A: Some use 1500 instead of 1800 for more insulin-sensitive individuals, or 2000 for those with type 2 diabetes.
Q5: Should this be used alone for dosing decisions?
A: No, always consider other factors like meal timing, activity level, and individual response to insulin.