Iodixanol in excretory urography: initial clinical experience with a nonionic, dimeric (ratio 6:1) contrast medium....

Area of Science:

• Radiology
• Medical Imaging
• Pharmacology

Background:

• Contrast media are essential for diagnostic imaging.
• Existing contrast agents can cause adverse effects due to osmolality and chemotoxicity.
• Iodixanol is a novel, highly water-soluble, nonionic dimer contrast medium designed to improve safety and tolerability.

Purpose of the Study:

• To report the initial clinical experience in the United States with iodixanol.
• To evaluate the safety, tolerability, and diagnostic efficacy of iodixanol in patients undergoing excretory urography.
• To assess the potential of iodixanol to minimize side effects associated with conventional contrast media.

Main Methods:

• A prospective study involving 40 patients undergoing elective excretory urography.
• Patients received bolus injections of iodixanol at doses of 27 or 32 g of iodine.
• Safety, adverse events, and urographic quality were assessed.

Main Results:

• No adverse events or idiosyncratic reactions were reported in any patient.
• Seven patients experienced mild coolness at the injection site.
• Both doses of iodixanol consistently provided diagnostically adequate urographic examinations.
• Iodixanol's osmolality is less than half that of monomeric nonionic contrast media and was adjusted to be isosmotic to blood.

Conclusions:

• Iodixanol demonstrated a favorable safety profile and diagnostic efficacy in its initial U.S. clinical use for excretory urography.
• Its chemical properties suggest potential for reduced chemotoxic and osmotoxic side effects compared to other contrast media.
• Further clinical investigation is warranted to confirm these benefits and its impact on physiological functions.