Analysis by V. Matarese
The PREDICT study [1] is the latest addition to a body of evidence on the renal safety of iodinated contrast agents. In this randomized controlled trial (RCT), researchers from universities and private clinics in the US and China did a head-to-head comparison of intravenously administered Iodixanol-320 and Iopamidol-370, two well-studied nonionic contrast agents. Iodixanol is iso-osmolar to blood (290 mOsm/kg H20, 320 mgI/ml) while iopamidol is hyperosmolar to blood (796 mOsm/kg H20, 370 mgI/ml); however, iopamidol is a low-osmolar contrast medium due to the existence of contrast media of even greater osmolality.
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