An increase in the hepatic portal vein pressure due to impediments to venous flow into the liver,causing splenomegly with hypersplenism,varices or variceal bleeding in the stomach and esophagus,and ascites etc.spenomegly hypersplenismspenomegly varicesascites出血不止能使内脏小动脉收缩，血流量减少，从而减少内脏能使内脏小动脉收缩，血流量减少，从而减少内脏 回血量，短暂降低门脉压力回血量，短暂降低门脉压力使曲张静脉破裂处形成血栓而达到止血使曲张静脉破裂处形成血栓而达到止血有加重肝缺氧和加重肝功能损害的缺点有加重肝缺氧和加重肝功能损害的缺点对高血压和有冠状血管供血不足者不适用对高血压和有冠状血管供血不足者不适用2 2）套扎治疗）套扎治疗
