门静脉高压症是一组由门静脉系统血流动力学异常和压力持久增高而引起的综合症。绝大多数病人由肝硬变引起,少数病人继发于门静脉主干或肝静脉回流受阻以及一些原因不明的因素。当门静脉血液不能顺利通过肝脏经过下腔静脉回流入心脏时,就会引起门静脉的压力增高,出现一系列相关的临床表现,如脾肿大、脾功能 Portal hypertension is a syndrome caused by a prolonged elevation of hemodynamics and pressure in the portal system. The vast majority of patients caused by cirrhosis, a small number of patients secondary to portal vein or hepatic venous obstruction and some unknown reasons. When the portal vein blood can not pass through the liver through the inferior vena cava back to the heart, it will cause increased pressure on the portal vein, a series of related clinical manifestations, such as splenomegaly, splenic function