RÉSUMÉ
Objective To observe the effect of drug pairs of extracts from Rhizoma Chuanxiong(RC)and Radix Paeoniae Rubra(RPR)in different proportions on promoting blood circulation and removing blood stasis in rats and to find the optimal proportion between the two extracts.Methods The Wistar rat models of blood stasis were established by injection of adrenalin.The changes of the platelet aggregation and adhesiveness and erythrocyte aggregation were observed.Results Blood vessel contraction increased,the platelet aggregation and erythrocyte aggregation increased,erythrocyte deformation occurred and the blood viscosity increased in the model rats.The drug pairs could reduce blood viscosity,ameliorate erythrocyte ability of deformation,reduce erythrocyte aggregation and inhibit platelet aggregation.The effects were obvious especially in the groups of RC and RPR in the proportions of 0.45 g to 0.45 g,0.21 g to 0.45 g.Conclusion The drug couples from RC and RPR in different proportions could improve the blood rheology,the effect being obvious in the groups of RC and RPR in the proportions of 0.45 g to 0.45 g,0.21 g to 0.45 g.