“…A midline laparotomy was performed, and precalibrated ultrasonic flow probes (Transonic Systems, Ithaca, N. Y., USA) were placed around the portal vein and the common hepatic artery as described previously [21,22]. A 4-Fr catheter (CS-16402, Arrow, Reading, Pa., USA) was then introduced into the portal vein, and an angiography catheter (7F Multipurpose A-1, Cordis, Roden, The Netherlands) was introduced via the right jugular vein into a hepatic vein under ultrasound guidance.…”