Urographic Excretion Studies with Metrizamide and "Dimer": A High Dose Comparison in Dogs

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Abstract
Metrizamide, a new non-ionic, triodinated contrast agent has been considerable for intravenous urography. Theory predicts that lower osmotic diuresis with this agent should lead to higher urinary iodine concentrations than with ionic agents, at equivalent iodine doses. However, a distinct advantage with metrizamide has not been observed with doses of 175 mgI/kg or less. In this study metrizamide and sodium locarmate were given intravenously to dehydrated dogs at a dose level of 600 mgI/kg. During the studies the concentrations and outputs of major urinary solutes were compared. Comparisons of urinary iodine concentrations and outputs showed that at this dose the predicted advantage with metrizamide can be observed.

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