Arterial occlusions in neonates: use of fibrinolytic therapy.

For neonates with ischemia of an extremity or extensive thrombosis of the aorta after umbilical artery catheterization, prompt recognition and management decisions are necessary. The cases of eight infants with symptomatic thrombosis who were treated with fibrinolytic agents were retrospectively reviewed to study means of diagnosis and response to therapy. Peripheral thrombosis was seen in two otherwise healthy infants; fibrinolytic therapy produced complete lysis in one and partial lysis in the other. The six infants with central thrombosis presented with low Apgar scores and multiple clinical problems; umbilical catheters were already in place. To assess the clot, real-time sonography was performed in all six patients, and umbilical arteriograms were obtained in five. Fibrinolytic therapy produced complete lysis of clot in five of the six infants. The one death occurred in a premature infant in whom a large intracranial hemorrhage developed 6 hours after institution of therapy.