Hepatic resection by hepatic parenchymal transection along the interlobar plane will fully expose the hilar plate when the conuence of hilar bile duct cannot be completely exposed by separating the hilar plate; due to its high posi­tion, or when the hilar is closed by hypertrophic scar tissue caused by stricture of high bile duct. Through transection of the median hepatic ssure, the hilar plate can be completely exposed. At this time, the left and right hepatic ducts and the junction of the conuence and the secondary hepatic duct can be fully exposed, which is conducive to creating more surgical space for resection and reconstruction of the dis­eased bile ducts (Jiang and Zhang 2001). The median hepatic ssure is the boundary between the left and right half of the liver. Since there are no other important blood vessels passing through the liver parenchyma except the middle liver vein, it is safe and feasible to transect the liver parenchyma directly to the hepatic portal along the middle hepatic ssure. In clinical practice, however, separation can be performed along the resection plane 1.0–1.5cm to the left of the median hepatic ssure, so as to avoid inadvertent injury of the middle hepatic vein. It is best to transect the median hepatic ssure after identifying the course of middle hepatic vein by intraoperative ultrasound. The length of incision measures two-thirds of the liver anteriorly, and the appropriate depth of incision is to fully expose the hilar bile duct. Small blood vessels or bile ducts on the separation sec­tion should be properly ligated or suture ligated to avoid postoperative bleeding or bile leakage. The use of CUSA devices for dissection of major intrahepatic vascular trunk can signicantly reduce intraoperative bleeding and bile duct injuries.