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Viscosity of iodinated contrast agents: Significance for peripheral venous injection

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      Abstract

      The meglumine salt of a urographic contrast agent is significantly more viscous than the comparable sodium salt. To noninvasively deliver a bolus to some patients it is often necessary to use a 21-guage needle. The inherent resistance of a 21-guage scalp needle results in approximately a 60% increase in injection time for the meglumine salt as opposed to the sodium salt.

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