Abstract
This study focuses on the effect of contrast media (CM) on thrombin generation. In vitro studies consisted of incubating nonanticoagulated whole blood with ionic CM (sodium meglumine diatrizoate, ioxaglate), nonionic CM (iohexol, iopamidol) or glucose in plastic tubes. Thrombin generation was assessed by measuring F1 + 2, ATM and FpA levels in plasma using ELISA assay kits. In a separate protocol, the procoagulant activity of 3 nonionic CM (iohexol, iopamidol, and iopromide) was investigated by one-stage plasma recalcification time method. Rabbit brain tissue thromboplastin and physiologic saline were used as standard and experimental controls. Incubation of ionic and nonionic CM with whole blood did not enhance thrombin generation compared to glucose control. Similarly, the plasma recalcification times were not significantly shortened by either of the 3 nonionic CM tested. These studies suggest that ionic and nonionic CM exhibit different levels of anticoagulant properties in vitro and the latter are not procoagulant materials.
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