Ioversol. Double-blind study of a new low osmolar contrast agent for peripheral and visceral arteriography.

The new low-osmolar contrast agent ioversol was compared with the conventional ionic contrast agent diatrizoate in 60 patients undergoing routine abdominal (21 patients) and peripheral (39 patients) arteriography. The effects on hemodynamics, various laboratory parameters, and patient comfort were evaluated. In peripheral arteriography, there was less discomfort with ioversol as well as decreased magnitude and incidence of hypotension (P less than .001) after injection. In visceral arteriography, there was no significant difference between the two agents. Overall, the incidence of ECG changes was small in both groups (ioversol 2%, diatrizoate 8%). The two media were equivalent in incidence of adverse reactions (eg, nausea, vomiting, urticaria), the effect on laboratory parameters, and in the diagnostic adequacy of the radiographs. We conclude that ioversol is safe and efficacious for peripheral and visceral arteriography. In peripheral arteriography it causes less patient discomfort and, perhaps more importantly, fewer hemodynamic alterations than diatrizoate. These differences in hemodynamic effects may be important in patients with hemodynamic instability or limited cardiovascular reserve.