[Excretory urography: comparison of the ionic contrast medium amidotrezoic acid with the non-ionic contrast medium iohexol].

The contrast media diatrizoic acid and iohexol were compared in a randomized double-blind study on the basis of 100 excretory urograms. It was found that side effects are less frequent under the non ionic contrast medium than under the ionic agent, the difference being statistically significant at the level alpha = 0.05. No statistically significant difference was recognizable concerning the overall quality of the urograms.