A Study of Laparoscopic Middle Hepatic Vein Guidance and Traditional Anatomic Hemihepatectomy

Inclusion Criteria: 1. the site was limited to the patients who were suitable for dissecting hemihepatectomy； 2. the type of disease was limited to hepatocellular carcinoma； 3. the patients were generally able to tolerate anesthesia, the liver reserve function was good, and the patients were suitable for laparoscopic surgery； 4. child-pugh grade A, no severe liver cirrhosis, portal hypertension, no extrahepatic and extrahepatic metastasis and main vascular invasion； 5. the subjects who participated in this study indicated that they were willing to accept the two surgical methods and agreed to be randomly divided into groups during the operation； 6. 18 ≤ age ≤ 70, male or female. Exclusion Criteria: 1. preoperative liver function Child-pugh grade B or C; 2. patients with poor general condition and could not tolerate pneumoperitoneum or anesthesia; 3. patients with severe liver cirrhosis, portal hypertension and lesions invading liver porta; 4. patients with other treatment methods such as radio frequency ablation in addition to dissecting hepatectomy; 5. repeated abdominal operations resulting in severe abdominal adhesion, unable to perform laparoscopic hepatectomy; male and female are not limited