[Quality control in urography with iopamidol and iohexol. A parallel comparison].

Iohexol has a slightly higher osmolarity in comparison with iopamidol; therefore it might induce a more pronounced diuretic effect and then a better distension of the excretory pathway. A trial was carried out in two groups of 50 patients with normal renal function who underwent urography, namely with 50 ml (15 gI) of iopamidol and of iohexol. No significant differences in the evaluated parameters (nephrography, calyces, pelvis, ureters and bladder) have been found. Both contrast media allowed to perform good quality urographies.