丹参、当归皆属活血化瘀药,临床认为丹参功用以活血为主,当归以补血为主。为了解此两药作用的区别,作者观测两药对老年大鼠血液流变学指标的影响。实验用鼠龄>2年之老年大鼠(既往工作证明大鼠随增龄其血液流变性呈粘浓凝聚改变,可作为天然血瘀模型),丹参、当归均制成40%水煎剂。分别灌胃给药 Salvia miltiorrhiza and angelica all belong to blood circulation and phlegm medicine. Clinically, Salvia miltiorrhiza is mainly used for blood circulation, while angelica root is mainly for blood. To understand the difference between these two drugs, the authors observed the effects of the two drugs on hemorheology in aged rats. Rats aged >2 years old were used for the experiment (The previous work showed that the blood rheology of rats increased with thickening and coagulation, and it could be used as a natural blood stasis model). Salvia miltiorrhiza and Angelica sinensis were made into 40% water decoction. Gastric administration