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门脉高压是由门脉血流量和血管阻力增加所致,血管阻力则与血液粘稠度及血管长度成正比,与血管半径的4次方成反比。影响这些条件的因素很多,肝硬化为肝内门脉高压的主要原因,但还有很多非肝硬化因素:①肝脏病:急性酒精性肝炎、急性妊娠脂肪肝和暴发型肝炎,慢性酒精性肝病、慢性活动性肝炎、胆汁性肝硬化早期、Wilson 氏病、特发性门脉高压、先天性肝纤维化、肉样瘤病和转移性癌肿等。②药物及毒物:如口服避孕药、抗肿瘤剂、
Portal hypertension is caused by an increase in portal blood flow and vascular resistance, and vascular resistance is directly proportional to blood viscosity and vessel length, inversely proportional to the fourth power of the vessel radius. Many factors affect these conditions, cirrhosis of the liver is the main reason for portal hypertension, but there are many non-cirrhosis factors: ① liver disease: acute alcoholic hepatitis, acute fatty liver of pregnancy and fulminant hepatitis, chronic alcoholic liver disease , Chronic active hepatitis, early biliary cirrhosis, Wilson’s disease, idiopathic portal hypertension, congenital liver fibrosis, sarcoidosis and metastatic cancer. ② drugs and poisons: such as oral contraceptives, anti-tumor agents,