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Related Experiment Videos

Experimental urography with new non-ionic dimeric and monomeric contrast agents.

E Holtz1, K Golman

  • 1Department of Pharmacology and Toxicology, Nycomed As, Oslo, Norway.

Acta Radiologica. Supplementum
|January 1, 1987
PubMed
Summary

New non-ionic dimeric contrast media showed superior performance in urography compared to monomers in rabbit models. Iopentol demonstrated efficacy comparable to iohexol across all assessed parameters.

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Area of Science:

  • Radiology
  • Medical Imaging
  • Pharmacology

Background:

  • Contrast media are essential for diagnostic imaging procedures like urography.
  • Non-ionic contrast agents offer improved safety profiles compared to ionic agents.
  • Development of novel contrast media aims to enhance diagnostic accuracy and patient outcomes.

Purpose of the Study:

  • To evaluate the efficacy of new non-ionic dimeric (iodixanol, cpd. 2-5410-4A) and monomeric (iopentol) contrast media in urography.
  • To compare the performance of these novel agents against a known standard (iohexol) in a rabbit model.
  • To assess the impact of hydration status and dosage on contrast medium performance.

Main Methods:

  • A rabbit model was used to investigate urographic contrast media.

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  • Three dose levels were administered to normally hydrated animals, and one dose level to dehydrated animals.
  • Key parameters evaluated included urinary iodine concentration, urine flow, estimated attenuation capacity, and radiographic scoring.

    • Main Results:

    • Non-ionic dimeric contrast media (iodixanol, cpd. 2-5410-4A) exhibited higher urinary iodine concentrations, enhanced attenuation capacity, and superior radiographic scores compared to monomers at high doses and in dehydrated states.
    • Iopentol demonstrated comparable efficacy to iohexol across all evaluated parameters.
    • Dimeric agents showed dose-dependent and hydration-dependent effects on urographic performance.

    Conclusions:

    • New non-ionic dimeric contrast media show promising potential for improved urographic imaging.
    • Iopentol represents a viable alternative to iohexol for urography.
    • Hydration status and dosage significantly influence the performance of urographic contrast media.