休克病理生理Shock PathophysiologyShock is a pathological process of decreased effective circulating blood volume,tissue perfusion,cell metabolism disorder and impaired function. It is a syndrome caused by a variety of etiologies.lnormal circumstances（1） The arteriovenous anastomosis is closed .（2） Only 20% of capillaries open alternately, with hemoperfusion. （3） Capillary opening and closing are regulated by the relaxation and contraction of the anterior sphincter of the capillary.lphase of microcircu
