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American Journal of Roentgenology, Vol 144, Issue 4, 843-846
Copyright © 1985 by American Roentgen Ray Society

Articles

Inferior vena cava CT pseudothrombus produced by rapid arm-vein contrast infusion

RL Vogelzang, RM Gore, HL Neiman, SJ Smith, TW Deschler, and RF Vrla

Laminar flow within the inferior vena cava can cause artifacts that may simulate thrombus if a foot-vein infusion is used. A "pseudothrombus" artifact within the suprarenal inferior vena cava produced by rapid infusion of contrast material through an arm vein is reported. This artifact was noted in 25 patients in a 6 month period and was believed to be from laminar flow of renal venous effluent of increased opacity around less opacified infrarenal caval contents. Differentiation from true thrombus can be made by the use of delayed scans as well as the increased density and relatively poor margination of the artifact.
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