Abstract
Purpose: To assess the dialysability of iobitridol, a comparative study with iohexol was conducted in the rat over 4 hours.
Material and Methods: After ligature of the renal veins and arteries, a group of animals was submitted to continuous peritoneal dialysis, while the remainder were not.
Results: In the event of total renal failure, biliary excretion rose from 0.4 to 9% for iobitridol and from 2 to 16% for iohexol. In the rats submitted to peritoneal dialysis, biliary excretion decreased to 5% in the iobitridol group and to 13% in the iohexol group. Further, 18% of the test substances were eliminated in the dialysis liquid.
Conclusions: As their physicochemical characteristics are very similar, the differences between the biliary excretion levels of these 2 media may be caused by a factor related to their respective molecular conformations.