实验性肝硬化的病理变化形成过程中门静脉血流动力学的改变

目的:通过对实验性大鼠肝硬化时门静脉血流动力学的变化,了解门脉高压的形成过程。方法:健康Wistar大鼠皮下注射四氯化碳,观察肝组织的病理改变过程中其门静脉血流动力学的变化。结果:实验性肝硬化过程中肝细胞经历变性、坏死、纤维组织增生及假小叶的形成。门静脉内径、血流速度、流量在注射四氯化碳2周后明显升高(P＜0.05或P＜0.01);15周时由于形成了侧枝循环,上述测值又明显低了(P＜0.01);注射四氯化碳大鼠门脉充血分数除在10周时变化无统计学意义外(P>0.05),2周、5周、15周时均比前一组明显高(P＜0.05或P＜0.01)。结论:大鼠在肝硬化形成过程中门静脉血流动力学变化与肝组织的病理改变均发生了变化。

Changes of portal hemodynamics in the development of experimental liver cirrhosis

AIM: To understand the formation of portal hypertension through the change of portal hemodynamics on experiment cirrhosis. METHODS: Carbon tetrachloride was subcutaneously injected in the rat. The changes of the portal hemodynamics in the pathological process of liver tissue were observed. RESULTS: The liver underwent degeneration, necrosis of hepatocytes, and the normal architecture of the liver lobules was replaced by pseudolobule, which consist of regenerative hepatocytes and fibrous septa. The diameter, the blood flow velocity and the blood flow quantity of portal were significantly higher than that in former group (P<0 05 or P<0 01) two weeks after the injection of carbon tetrachloride. In the fifteenth week, these parameters were lower than that before owing to the forming of portacaval collateral circulation (P<0 01). The congest index of the portal in second week, fifth week and fifteenth week were statistically higher than its predecessor (P<0 05 or P<0 01), except that in tenth week, which had no statistical significance (P>0 05). CONCLUSION: The changes in hemodynamics of the portal are in accordance with the changes in pathology of liver in the formation of liver cirrhosis.