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门脉高压多由肝硬化引起。凡肝脏弥漫性病变(炎症、变性、坏死)后,发生纤维组织异常增生和结节过度形成,以及门脉或肝静脉系某些疾病,能影响门脉血循环,在长期增加门脉阻力的情况下,就可导致门脉高压。近来认为,一些液递物质可增加门脉或肝静脉系血管的阻力或血流最,形成高动力循环状态。这一点对形成门脉高压亦很重要。根据门脉系统病变和受阻部位,门脉高压症一般可分为以下三类:
Portal hypertension caused by cirrhosis. Where diffuse lesions of the liver (inflammation, degeneration, necrosis), the occurrence of fibrous tissue dysplasia and excessive formation of nodules, and some diseases of the portal vein or hepatic vein can affect the portal circulation in the long-term increase in portal resistance Under, can lead to portal hypertension. Recently that some liquid delivery substances can increase the portal vein or hepatic vein vascular resistance or blood flow most, the formation of high power cycle state. This is also important for the formation of portal hypertension. According to portal disease and obstruction site, portal hypertension can generally be divided into the following three categories: