Swelling and pain appear when blood flow is delayed in states of "oketsu." Until now "oketsu" as a circulatory disturbance has been studied from profiles of vascular resistance characteristics and blood fluidity. Blood fluidity is influenced by blood cell function, plasma ingredients and reactive oxygen. In this study, we administered the various Chinese herbal medicines, tokishakuyakusan, saikokaryukotsuboreito, tokakujokito, keishibukuryogan and juzentaihoto to determine the effect of these medicines on "oketsu" by observing reactive oxygen dynamics and blood fluidity in rats. SPF male Wistar rats weighing 200 g were used. Each experimental group was given feed containing 3 extract of one Chinese herbal medicine for 1 week. Blood samples were mixed with heparin, EDTA-2K or sodium citrate to block coagulation. Blood fluidity was measured with a Micro Channel Array Flow Analyzer (MC-FAN). A PA-20 examined platelet aggregation by the reaction to ADP, which activates platelet aggregation. Reactive oxygen dynamics were measured with a Free Radical Elective Evaluator (FREE). As a result, anti-oxidative ability and blood fluidity increased in all Chinese herbal medicine-administered groups. Furthermore, an inverse correlation between the fluidity of erythrocyte suspensions and anti-oxidative ability was shown. We speculate that an anti-oxidative influence of Chinese herbal medicines affected erythroid deformability or stickiness. In addition, tokishakuyakusan, tokakujokito and keishibukuryogan decreased platelet aggregation ability. This study shows that "oketsu" improves blood properties and suggests that Chinese herbal medicine improves decrease in blood fluidity, the causes of conditions such as thrombosis or embolism. oketsu, reactive oxygen, blood fluidity, platelet aggregation ! ! !
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