Department of Radiology, Chonan Hospital, Soonchunhyang University.
Published online: January 1, 2001.
ABSTRACT
PURPOSE: To evaluate the usefulness of ultrasonography for diagnosis of portal vein thrombosis (PVT) associated with the umbilical venous cathterization (UVC). MATERIALS AND METHODS: We reviewed the abnormal ultrasonography of 54 patients with UVC. We observed e-chogenic thrombus in the portal vein by ultrasonography which has a 5-10 MHz linear transducer. We evaluated the frequency of PVT, the relationship between PVT and duration of UVC, and the location of catheter tip (Group I (n = 41): above the diaphragm, Group II (n = 9): between the diaphragm and the liver, Group III (n = 4): below the liver), the location of thrombus on US, and the change of PVT on the follow-up ultrasonography. RESULTS: PVT was identified in the 7 neonates (13%) among the 54 neonates with UVC. The frequency of PVT was 5% on group I, 45% on group II and 25% on group III. The 6 cases among the 7 cases(86%) of PVT were localized to the umbilical portion of the left portal vein, and there were completely resolved (n= 4) or regressed (n = 1) on the follow-up ultrasonography(n = 5). Ramaining one case of PVT was located in the right, left, and main portal veins with collateral formation, and cavernous transformation occured on the follow-up. CONCLUSION: Most PVTs by UVC are localized to the umbilical portion of left portal vein. Ultrasonography is a useful modality to diagnose PVT by UVC.
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