Objective To investigate the onset and risk factors of the transient ischemic attack of vertebrobasilar artery vertige in old patients. Methods Patients were divided into group A, group B, group C based on attack times of vertige and whether cerebral thrombosis was formed within half a year. Blood biochemistry index, blood pressure variation, carotid ultrasonic examination results in the first 24 hours were compared. Results High sensitive C-reactive protein (hs-CRP), systolic blood pressure (SBP), diastolic blood pressure(DBP), blood sugar(BS), cholesterol(TC), triglyceride(TG), common carotid artery resistance of group A index(CCARI), internal carotid artery resistance index(ICARI) and atherosis plaque index in the first 24 hours were significantly lower than those of group C (P0.05). Logistic regression indicated that hs-CRP, DBP, BS, TC, CCARI, ICARI and plaque index were correlated with risk factors of the transient ischemic attack of vertebrobasilar artery vertige and cerebral thrombosis in old patients. Conclusion hs-CRP, SBP, BS, TC, CCARI, ICARI and plaque index elevation might be an early warning index for the unstability and easy drop of the carotid's plaque.

OBJECTIVE:To optimize the clarification and purification technology of Perillae folium extract. METHODS:The effects of 3 clarification and purification methods as chitosan flocculation clarification,ZTC 1+1-Ⅱflocculation clarification,water precipitation on retention rate of total flavonoids and removal rate of solid of Perillae folium extract were compared to screen suit-able clarification and purification technology. With the retention rate of total flavonoids and removal rate of solid as comprehensive evaluation index,single factor and orthogonal test were designed to investigate the optimal value of concentration proportion,the amount of the flocculant,flocculation temperature and whisking speed in optimal clarification and purification method. RESULTS:Among 3 methods,the chitosan flocculation clarification was the best with concentration proportion of 1∶4,chitosan of 1.0 g/L, flocculation temperature at 60 ℃,whisking speed of 100 r/min,whisking time of 4 min,standing time of 12 h. Under the condi-tion of optimal processing,the retention rate of total flavonoids was (85.1 ± 0.75)%,and the removal rate of solid was (24.6 ± 1.33)%(n=5). CONCLUSIONS:Chitosan flocculation can be used to effectively remove the impurity of Perillae folium extract, and optimized clarification and purification technology is stable and feasible.