logo Ig Dose Calculator

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(equals 0 lbs)

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g/kg
Adjusted Body Weight = kg
IVIg Total Dose = g

The IVIg dose is calculated using adjusted body weight for adult males over 50kg (110 lb). The Adjusted Body Weight is 50% of the difference between Ideal Body Weight and Actual Body Weight.

The calculated Ideal Body Weight = kg
Dose by Day Calculator

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g
days

The IVIg Dose by Day Total is rounded to the nearest 5g and divided by the number of days.

If the number of days is greater than one, the daily gram allocation frontloads the higher dose days.

Current IVIg Total Dose is known

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g

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weeks
SCIg Weekly Dose = g/week
Current IVIg Total Dose is NOT known

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(equals 0 lbs)

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g/kg/week
SCIg Weekly Dose = g/week

The SCIg dose is calculated using actual body weight.

The SCIg calculator has no restricions for height, weight, age or gender.

If SCIg dose adjustment is required, use the IVIg Dose Calculator to determine the IVIg Total dose and copy to SCIg calculator.


Disclaimer:

The information presented is intended to provide guidance only and does not constitute medical advice. Any decision involving patient care must be based on the judgment of the attending physician according to the needs and condition of each individual patient. Neither the guidelines nor the IVIg or SCIg dose calculator is intended to replace sound clinical judgment concerning a patient's unique situation.

Additional Information:

The BC Provincial Blood Coordinating Office gratefully acknowledges Transfusion Ontario for use of their template for the Ideal Body Weight Calculator with IVIg Dosing. The calculator has been modified slightly to incorporate the Ohio State University Medical Center formula for calculation of the Dosing Weight, as detailed below.

The IVIg Dose Calculation

The dosing information contained in the Intravenous Immune Globulin (IVIg) Utilization Management Program Recommendations should be followed.

Definitions

Ideal Body Weighti (IBW), Devine Formula is:

    • Adjusted Body Weighti should only be used to calculate the dose of drugs for which there are recommendations specifying that the actual body weight should be adjusted for use in the dose calculations.

    Adjusted Body Weight = IBW + [0.5 x (Actual - IBW)]

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    References:

    [i] Pai MP, Paloucek FP. The origin of the "ideal" body weight equations. Ann Pharmacother. 2000 Sep;34(9):1066-9

    [ii] Siegel J. Immunoglobulins and obesity. Pharmacy Practice News. 2010;37(1):8-9.