Endocrinology

Insulin Sensitivity Factor (ISF)

Name: Insulin Sensitivity Factor (ISF) | StudyPrometric Tools
Keywords: insulin, isf, correction factor, 1800 rule, 1500 rule, diabetes, glucose, tdd

Calculates the expected blood glucose drop per 1 unit of insulin.

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Parameters

Insulin Sensitivity Factor (ISF) Result

Formula

Rapid-acting: 1800 / TDD
Regular: 1500 / TDD

Clinical Pearls

Provides the foundation for calculating a correction dose (bolus) when a diabetic patient has pre-meal hyperglycemia.

Limitations

This is an empirical estimate. The actual sensitivity may vary depending on time of day, stress, illness, activity level, and injection site.