Insulin Sensitivity Factor is the number of mg/dL one unit of insulin lowers
1500* / Total Daily Dose of Insulin = ISF
The Carbohydrate Ratio is the number of carbohydrate grams covered by one unit of
450 / Total Daily Dose of Insulin
To use the insulin sensitivity factor calculate the difference between
the current blood sugar (glucose) and the desired blood sugar. Then divide
the result by the sensitivity factor. The result is the amount of insulin that
needs to be added or subtracted from the premeal insulin dose.
Current blood sugar is 140, target blood sugar is 100. Insulin sensitivity
factor is 20.
Correction = (140-100)/20 = 2
*The 1500 Rule was developed by Dr. Paul C. Davidson, Medical Director of the
Diabetes Treatment Center in Atlanta.
All calculations must be confirmed before use. The suggested results are not a substitute for clinical
judgment. Neither OBFocus.com nor any other party involved in the preparation or publication of this site shall be liable for any special, consequential,
or exemplary damages resulting in whole or part from any user's use of or reliance upon this material.