Iohexol Clearance in Critically Ill Patients With Augmented Renal Creatinine Clearance

"Intravenous injection of 5 ml of iohexol (Omnipaque) to calculate the glomerular filtration rate (area under the curve).~Blood samples (2 ml) and urine (2 ml minimum) are to be collected for the determination of iohexol clearance at the following time points: pre-dose, 5 minutes, and 1, 2, 3, 4, 5, 6 hours post dose."