Renal function following nephroangiography with metrizamide and iohexol. Effects on renal blood flow, glomerular permeability and filtration rate and diuresis in dogs.

The non-ionic ratio 3.0 contrast media metrizamide and iohexol used in high-dose unilateral nephroangiography in dogs produce homogeneous nephrograms and no marked effects on renal blood flow, glomerular filtration rate, and osmotic diuresis, in contrast to previously reported results using the same technique with iodine-equivalent doses of the ionic ratio 1.5 contrast medium diatrizoate (25). Iohexol affected glomerular permeability significantly less than metrizamide and diatrizoate.