兔急性肺血栓栓塞及溶栓后TXA2?PGI2及ET-1水平的变化与血流动力学相关性研究

目的:探讨兔急性肺动脉血栓栓塞时血清炎症因子血栓素A2(TXA2)、前列环素(PGI2)和肺血管内皮、支气管和肺泡上皮等部位内皮素1(ET-1)变化和血流动力学指标变化及尿激酶(UK)溶栓的影响。方法:24只大耳白兔随机分为对照组、急性肺栓塞(acute pulmonary thromboembolism,APTE)模型组、尿激酶(UK)治疗组,每组8只。采用自体血栓回输法建立动物模型。常规于造模前、造模后1、2、4、8h放免法测定血清TXA2、PGI2,漂浮导管监测血流动力学指标,最后免疫组化法检测肺血管内皮、支气管和肺泡上皮各部位ET-1的表达水平。结果:①放免法测定结果:对照组各时间点无显著差异。模型组1h升高,4h达高峰,其后开始降低,1、2、4h点与对照组比较都有统计学意义(P<0.01)。UK组1h升高,2h达高峰,4h后开始下降,UK组高峰值较模型组低,1、2、4h UK组与模型组两者有统计学意义(P<0.01)。各组术前和8h无统计学差异(P>0.05);②血流动力学监测结果:对照组各时间点肺动脉平均压(PAMP)、中心静脉压(CVP)都无明显变化,模型组及UK组PAMP、CVP栓塞后立即升高...

The correlation study between levels of TXA2,PGI2,ET-1 and hemodynamic changes after thrombolysis in acute pulmonary embolism of rabbit

Objective:To study the expression levels of thromboxane A2(TXA2) and prostacyclin (PGI2) in the plasma,endothelin-1 (ET-1)in vascular endothelium,bronchial and alveolar epithelia of lungs,and hemodynamic changes in acute pulmonary thromboembolism(APTE) of rabbit,and to explore the effects of thrombolytic(urokinase,UK)on their expressions. Methods:Twenty four rabbits were randomly divided into a control group,a APTE model group,a UK therapy group,with 8 rabbits each. The APTE model was established by intrave...