Randamized clinical trial for effect of intraoperative auto blood donation for bleeding during liver resection in living liver transplantation

INTERVENTION: Participated patients will be divided into two groups randomaly. One is blood donotion group and the other is non‐blood donoation group. Pstients in blood donation group will be donated auto blood which is equal to 0.7 % of their body weight at the begining of the operation. It will be tranptranted to them before the operation will be finished. Patients in non‐blood donoation group will not be added extra treatment or intervention. CONDITION: Living liver donor PRIMARY OUTCOME: amount of bleeding during hepatic resection SECONDARY OUTCOME: total amount of bleeding in operation, time of hepatic resectioon, duration of hospital stay. INCLUSION CRITERIA: 1) Living liver donor 2) Age>=18 years old 3) Male and female 4) Patients with imformed concsent