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Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
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Iodinated contrast medium-induced potassium release: the effect of mixing ratios

Katsumi Hayakawa1, Tatsuo Nakamura, Yasuhiko Shimizu

  • 1Department of Radiology, Kyoto City Hospital, Mibu, Japan.

Radiation Medicine
|September 26, 2002
PubMed

Insights

Higher concentrations of iodinated contrast media (CM) mixed with blood increase potassium release. This study quantifies potassium release rates at various blood-to-CM mixing ratios in vitro.

Area of Science:

  • Radiology
  • Clinical Chemistry
  • Pharmacology

Background:

  • Iodinated contrast media (CM) administration can elevate serum potassium levels.
  • The mechanism involves the release of potassium from erythrocytes into the intravascular space.
  • Understanding factors influencing potassium release is crucial for patient safety.

Purpose of the Study:

  • To investigate the impact of varying mixing ratios of iodinated CM and human blood on potassium release rates.
  • To compare potassium release induced by different types of iodinated CM.

Main Methods:

  • Human blood from 52 patients was mixed in vitro with iodinated CM at blood:CM ratios from 10:2 to 10:10.
  • Potassium release rates were measured over 30 minutes.
  • Tested CM included iopamidol, meglumine/sodium ioxaglate, and meglumine/sodium diatrizoate.

Main Results:

  • Potassium release rates showed a statistically significant increase as the CM mixing ratio increased from 10:2 to 10:10.
  • Meglumine/sodium diatrizoate induced the highest potassium release.
  • Iopamidol and meglumine/sodium ioxaglate resulted in lower potassium release compared to diatrizoate.

Conclusions:

  • The ratio of iodinated contrast medium to blood directly influences the rate of potassium release.
  • Higher mixing ratios lead to greater potassium release.
  • CM composition affects the extent of potassium release, with diatrizoate showing the most significant effect.
Abstract

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