Portal venous velocity index (PVI) was defined as the ratio of PVV to graft weight (GW), and portal flow volume index (PFI) as the ratio of PVF to GW.

• 门静脉流速指数（PVI）被定义为PVV与移植物重量（GW）的比率，门静脉血流量指数（PFI）为PVF与GW的比率。