Portal vein thrombosis has been associated with umbilical venous catheterization. We studied the incidence of portal vein thrombosis associated with umbilical venous catheterization with the catheter tip not in the portal venous system. Appropriate placement of an umbilical venous catheter in sick neonates is associated with a low risk of portal vein thrombosis (actual incidence, 1.3%).
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Schwartz et al. (1997) studied this question.
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