Operation Manual

Table Of Contents
MEDRAD
®
Salient Operation Manual 69
In adults, the best equation for estimating glomerular filtration rate (GFR) from serum creatinine is the isotope
dilution mass spectrometry (IDMS)-traceable Modification of Diet in Renal Disease (MDRD) Study equation.
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All laboratories should be using creatinine methods calibrated to be IDMS traceable.
This IDMS-traceable MDRD study equation calculator is for use with Scr reported in mg/dL.
GFR (mL/min/1.73 m
2
) = 175 x (Scr)-1.154 x (Age)-0.203 x (0.742 if female) x (1.212 if African descent).
From the Injector Controller screen, press
Enter the patient data and assess the appropriate contrast dose accordingly.
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Reference: Levey AS, Coresh J, Greene T, Stevens LA, Zhang YL, Hendriksen S, Kusek JW, Van Lente F; Chronic Kidney Disease
Epidemiology Collaboration. Using standardized serum creatinine values in the modification of diet in renal disease study equation for
estimating glomerular filtration rate. Ann Intern Med. 2006 Aug 15;145(4):247-54.
Warning: The recommended contrast volume calculated by the eGFR calculator does not alter
the programmed volume in the current injection protocol. The clinician should use the result, in
combination with clinical experience to decide on the dose and separately program the volume into the
injection protocol.
Warning: The model for the calculation is applicable for adults only. The MDRD calculation is
not recommended for paediatric patients.