目的　探讨脑血管血流动力学参数临界压 (CP)与血流动力学的关系。方法　采用脑血管血流动力学分析仪 (CV - 30 0 )检测 84例体检者的脑血管临界压 ,并随访体外肘静脉血流动力学指标 ,进行多因素相关分析。结果　CP与血清胆固醇等脂蛋白浓度、全血粘度等呈正相关 (P <0 0 5或P <0 0 1) ,而与红细胞变形指数呈显著的负相关 (P <0 0 1)。结论　脑血管临界压与血粘度有关 ,血粘度增加 ,脑血管临界压升高 Objective To investigate the relationship between cerebrovascular hemodynamic parameters critical pressure (CP) and hemodynamics. Methods Cerebral vascular hemodynamic analyzer (CV - 30 0) was used to detect the cerebrovascular critical pressure in 84 subjects and the elbow vein hemodynamics were followed up for multivariate correlation analysis. Results CP was positively correlated with serum cholesterol and other lipoprotein concentrations, whole blood viscosity (P <0.05 or P <0.01), but negatively correlated with erythrocyte deformability index (P <0.01). Conclusions The critical pressure of cerebrovascular is related to the blood viscosity, the blood viscosity increases and the critical pressure of cerebrovascular pressure rises