Nephrotoxicity of Ionic and Non-Ionic Contrast Media in Aorto-Femoral Angiography

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Abstract
Nineteen patients examined with aorto-femoral angiography were randomized into two contrast medium groups (meglumine metrizoate and iohexol). Urine activity of β-hexosaminidase, a specific renal enzyme, was determined before and on three occasions after angiography. No change of β-hexosaminidase activity was found after angiography with iohexol, while there was a significant increase after examination with meglumine metrizoate. This indicates that meglumine metrizoate even following injection into the abdominal aorta damages renal cells which could not be shown with iohexol as contrast medium. We therefore recommend that at least patients with impaired renal function should be examined with the non-ionic contrast medium iohexol to minimize the danger of further damage to the kidneys and a possible renal failure.

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