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Do nonionic contrast media increase red cell aggregation and clot formation?

P Aspelin1, H Schmid-Schönbein, H Malotta

  • 1Department of Diagnostic Radiology, Malmö General Hospital, University of Lund, Sweden.

Investigative Radiology
|November 1, 1988
PubMed
Summary
This summary is machine-generated.

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Contrast media temporarily increase red blood cell aggregation. This effect disperses under shear stress and poses minimal risk for thrombus formation in vivo or in syringes.

Area of Science:

  • Biomedical Engineering
  • Hematology
  • Radiology

Background:

  • Contrast media are essential in medical imaging.
  • Understanding their interaction with blood components is crucial for patient safety.

Purpose of the Study:

  • To investigate the effects of iodinated contrast media (ioxaglate and iohexol) on red blood cell aggregation and blood coagulation.
  • To assess the in vivo relevance of observed aggregation phenomena.

Main Methods:

  • Macroscopic and microscopic observation of red cell aggregate formation.
  • Measurement of aggregation kinetics using a rheoscope and photoaggregometer at varying shear rates.
  • Coagulation studies on platelet-rich plasma, including platelet shape analysis and coagulation time measurements.

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Main Results:

  • Initial contact with contrast media induced red blood cell aggregation.
  • Aggregation dispersed upon application of shear force and did not reform.
  • No inducible blood clot formation was observed in concentrated contrast media solutions.
  • Platelet shape remained unchanged, and coagulation times were not significantly altered.

Conclusions:

  • Transient red blood cell aggregation in contrast media is shear-dependent and unlikely to be significant in arterial circulation.
  • The risk of thrombus formation in contrast medium-filled syringes is minimal.