病理改变流行性出血热的病理改变的基本特点是:小血管(毛细血管、小动脉、小静脉)管壁的局灶性水肿、膨胀和疏松。以致血管麻痹,扩张(不对称性),充血,血栓形成,内皮细胞肿胀,血管壁的脆性及渗透性增加,导致大量血浆外渗及出血。(1—6)这些改变在不同病人及同一病人的不同病期,不同器官,其改变的 Pathological changes The basic characteristics of pathological changes in epidemic hemorrhagic fever are: focal edema, swelling and loosening of the walls of small blood vessels (capillaries, arterioles, veins). As a result, blood vessel paralysis, dilatation (asymmetry), congestion, thrombosis, endothelial cell swelling, increased fragility and permeability of the vessel wall lead to extensive plasma extravasation and bleeding. (1-6) These changes in different patients and the same patient at different stages, different organs, the changes