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the direction of flow in the veins below the umbilicus. After pushing down on the prominent vein, blood will:
* flow toward the legs -> caput medusae
* flow toward the head -> inferior vena cava obstruction.
* Color Doppler ultrasonography is used to differentiate between vena cava obstruction and portal hypertension

See also

* Portacaval anastomosisIn Liver Cirrhosis, the paraumbilical veins open up to transfer portal venous

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