凡由严重肝病引起的中枢神经系统机能紊乱,表现以意识改变为主的神经精神症状,称为肝性昏迷或肝性脑病。肝性昏迷的发生主要由于肝机能损害严重或存在有门体静脉分流,以致不能清除血中氨等有毒代谢产物,有的则因肝功能损害导致糖、蛋白质、电解质等代谢紊乱以及神经介质异常有关。因门体静脉分流术所致的亦称门体循环性脑病。 Where the central nervous system disorders caused by severe liver disease, the performance of consciousness-based neuropsychiatric symptoms, known as hepatic coma or hepatic encephalopathy. The occurrence of hepatic coma is mainly due to the impairment of liver function or the presence of portal vein shunt, which can not clear the blood of ammonia and other toxic metabolites, while others due to liver damage caused by sugar, protein, electrolytes and other metabolic disorders and neurological abnormalities related. Due to portal vein shunt caused by the door also known as circulatory encephalopathy.