Sonographic features of umbilical vein recanalization for a Rex shunt on cavernous transformation of portal vein in children

Figure 3 Color Doppler ultrasonography of a 13-year-old boy after recanalized umbilical vein as a conduit for Rex shunt (splenic vein-umbilical vein shunt) operation. The boy was admitted to the hospital with hematemesis and black stool. A: Color Doppler flow imaging showed no blood flow signal in the bypass vessel (splenic vein) 7 d after operation; B: Color Doppler flow imaging showed no blood flow signal in the bypass vessel after clinical anticoagulation treatment for 3 mo. Arrow indicates splenic vein.