Disclaimer: Although the advice and information contained in the guidelines and dose calculator is believed to be true and accurate at the time of going to press, neither the authors nor the publishers can accept any legal responsibility for any errors or omissions that may have been made.
The BC IVIG Utilization Management Program gratefully acknowledges Transfusion Ontario for use of their template for the Ideal Body Weight Calculator with IVIG Dosing. We have modified the calculator slightly to incorporate the Ohio State University Medical Center formula for calculation of the Dosing Weight, as detailed below.
The Dose Calculator is intended to be used when determining the dose of IVIG for clinically obese patients; it is not recommended for pediatric patients nor any patients (incl. adults) under 5ft in height. For other patients, the dosing information recommended in the BC IVIG Utilization Management guidelines should be followed.
Neither the guidelines nor the dose calculator is intended to replace sound clinical judgment concerning a patient's unique situation.
Please note, to use this calculator:
Height must be between 153-241 cm (60-95 inches).|
Weight must be between 20-200 kg (44-441 pounds).|
|Ideal Body Weight1 (IBW), Devine Formula is:|
| Ideal Body Weight
(male) = 50.0 kg + 2.3 kg (each inch > 5 feet)
Ideal Body Weight (female) = 45.5 kg + 2.3 kg (each inch > 5 feet)
|Dosing Weight is an adjusted body weight (of
obese or overweight patients) and 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.
Dosing Weight = IBW + [0.5 x (Actual - IBW)]
exception: if Actual < IBW, then Dosing Weight = Actual
(Actual = actual body weight)
1. Pai MP, Paloucek FP. The origin of the "ideal" body weight equations. Ann Pharmacother. 2000
2. Sep;34(9):1066-9. Siegel J. Immunoglobulins and obesity. Pharmacy Practice News. 2010;37(1):8-9.