eGFR and iodine doses

Sorry, but I'm running out of people to ask this question.

I'm a CT Technologist for an imaging center in northern Virginia. I've been doing CT for about 8 years now, and as far as renal function, I've always used the Creatinine level as a standard (i.e. if it's over 1.5, no contrast).

There seems to be some sort of discussion about GFR. I work at another imaging center, and the nurses there start the IV's, and screen the patients. When they bring me the patient to scan, they've already figured out the GFR, and have noted how much contrast I am able to give this patient.

I've found the online calculators for obtaining the GFR, but I can't figure out how to determine how much contrast to give.

Sorry, I've been told that I'm very anal retentive.

papa

Errrrr, Dutch, don't you mean if the eGFR is BELOW 60, no contrast is given???
And, if it's ABOVE 60 (meaning the kidneys are functioning well, i.e., have a higher filtration rate) then contrast may be given?

I've never heard of any formula, based on the eGFR, by which one determines the amount of contrast to be given.

yeah, i've gotten that far. but somewhere in this wonderful world is a formula or something, that will tell how much contrast to give (with or without pre and post hydration). i'm prety sure it's related to GFR.papa