血管活性药物常作为抢救休克的重要药物之一，休克是以心脏排血量骤减与微循环功能障碍为主要特征的急性循环衰竭综合征。休克时常伴多脏器功能不全、弥漫性血管内凝血（ＤＩＣ）及急性呼吸窘迫综合征（ＡＲＤＳ）。主要表现为动脉系统灌注不足和绝对或相对血容量减少，但无静? Vasoactive drugs are often used as one of the important drugs in the rescue of shock. Shock is an acute circulatory failure syndrome characterized by sudden decrease of cardiac output and microcirculation dysfunction. Shock often accompanied by multiple organ dysfunction, diffuse intravascular coagulation (DIC) and acute respiratory distress syndrome (ARDS). Mainly manifested as inadequate arterial system perfusion and absolute or relative decrease in blood volume, but no static?