perinatology.com
Insulin Correction Dose Calculator -BETA

Home > Calculators > Insulin Correction Dose Calculator
Insulin Correction Dose Calculator

Select the type of insulin, enter the total daily dose of insulin used, the carbohydrate content of the meal, and press 'calculate' button to estimate  the amount of insulin needed to cover the carbohydrate content of the meal. 

All calculations must be confirmed before use. The suggested results are not a substitute for clinical judgment. Neither Perinatology.com nor any other party involved in the preparation or publication of this site shall be liable for any special, consequential, or exemplary


Insulin Type Rapid acting Insulin (Humalog, Novolog)  Short acting (Regular)
Total Daily Dose of Insulin (TDD)  units
Carbohydrate Content of meal :  grams
Current Blood Glucose mg/dL
Target Pre-Meal Blood Glucose mg/dL
Carbohydrate Ratio =  One unit of insulin covers grams of carbohydrate 
Insulin Sensitivity Factor  (ISF)  = One unit insulin decreases blood glucose by mg/dL
Insulin required to cover carbohydrate in meal   units

Correction to Dose Of Insulin   

units
 Dose Of Insulin for meal units


Meal related insulin boluses are calculated according to the carbohydrate content of the meal using the carbohydrate-to-insulin ratio (CIR)

The carbohydrate-to-insulin ratio (CIR) is the number of grams of carbohydrate that are covered by 1 unit of insulin. The CIR is calculated by dividing the constant 450 by the Total Daily Dose (TDD). The CIR may be different for different meals of the day.

CIR-= 450 / TDD

Example:
TDD= 50 units insulin
CIR=  450 /50 = 9 grams/unit
The meal has 90 grams of carbohydrate

Meal insulin bolus = carbohydrates/carbohydrate to insulin ratio CIR =90/9= 10 units

  • If the post meal blood sugar is above the targeted blood sugar range for  2 to 3 days then consider decreasing the CIR by 10 to 20 percent
  • If the post meal blood sugar is less than the targeted blood sugar range for 2 to 3 days then consider increasing the CIR by 10 to 20 percent

Calculation of Correction Dose

If the premeal blood sugar is out of the targeted range , the meal related insulin dose may need to be adjusted accordingly. To return the blood sugar to the desired premeal blood sugar from the current blood sugar it is necessary to determine the amount blood glucose is lowered by the injection of 1 unit of insulin.  The amount blood glucose is lowered by the injection of 1 unit of insulin is called the insulin sensitivity factor (also known as the correction factor) , and is calculated by dividing the constant 1700 by the Total Daily Dose (TDD) of rapid acting insulin  or dividing the constant 1500 by the Total Daily Dose of insulin (TDD) of short acting insulin.

Insulin Sensitivity Factor  (Correction Factor)  = 1700 / TDD

Example

TDD= 50 units insulin
ISF=  1700 /50 = 34 mg/dL
The current premeal blood sugar is 160 mg/dL
The target premeal blood sugar is 90 mg/dL

Correction dose =

(Current blood sugar -Target blood sugar) / ISF  =  (160-90)/ 34  =   2.1 units


REFERENCE

Staying on Target . Your Insulin Adjustment Workbook. Yes, You Can Do it! Becton, Dickinson and Company. http://www.bd.com/us/diabetes/download/insulin_adjustment_workbook_complete.pdf
Accessed 6/17/2012


Davidson PC, et al. Analysis of guidelines for basal-bolus insulin dosing: basal insulin, correction factor, and carbohydrate-to-insulin ratio. Endocr Pract. 2008 Dec;14(9):1095-101.PMID: 19158048
 

Home | About | Disclaimer | Privacy | Contact

Copyright 2012 by Focus Information Technology. All rights reserved.