Randomized controlled trial to evaluate the effects of the surgical instrument LigaSure on reduction of time of liver transection time, compared with the conventional clamp crushing method at the single institution

INTERVENTION: Liver transcetion using LigaSure Liver transection by the clamp crushing method CONDITION: Patients undergoing liver resection. PRIMARY OUTCOME: Liver transection time in hepatectomy SECONDARY OUTCOME: Transection area per minute, total operation time, total amount of bleeding, amount of bleeding during transection, amount of transfusion, incidence of bile leakage, postoperative bleeding, incidence of pleural effusion/ascites, hospital stay, postoperative iver function, total bilirubin value of the drained discharge INCLUSION CRITERIA: Patients, who are 20‐85 years old. scheduled to undergo hepatectomy at our institution, provide a written informed consent, and do not meet the below exclusion criteria.