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  • Title: Osmolality of nonionic contrast media.
    Author: Miklautz H, Fichte K, Wegscheider K.
    Journal: Fortschr Geb Rontgenstrahlen Nuklearmed Erganzungsbd; 1989; 128():16-20. PubMed ID: 2568786.
    Abstract:
    Solutions of different low osmolar contrast media (CM) obviously show clinically relevant differences in the osmolality despite equal iodine concentrations and similar molecular structure. To obtain precise and comparable data, the osmolality of five batches (usually) each of contrast media, iopamidol, iohexol, iopromide, and ioxaglate-all preparations commercially available-were measured by means of the vapor pressure method. The osmolality of the solutions of sodium meglumine ioxaglate with the same iodine concentration is lower than that of the nonionic CM examined. Iopromide showed the lowest osmolality and iohexol the highest value of the nonionic preparations. The differences are statistically significant as a rule. They are attributed to a varying association and hydration of the CM molecules in the solution.
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