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红细胞比容(hematocrit,Hct)是全血黏度的主要决定因素,与脑血流呈负相关。已有大量研究表明,Hct升高是缺血性卒中的危险因素,并能增加卒中患者的病死率。据推测,缺血半暗带组织内的高血黏度以及后来出现侧支血管血流停滞和舒缩反应性受损可能是Hct升高对缺血脑组织造成不利影
Hematocrit (Hct) is a major determinant of whole blood viscosity, and is negatively correlated with cerebral blood flow. A large number of studies have shown that elevated Hct is a risk factor for ischemic stroke and increases mortality in stroke patients. It is speculated that hyperinsulinemia in ischemic penumbra and consequent impaired collateral vessel blood flow and systolic and diastolic reactivity may result from adverse effects of elevated Hct levels on ischemic brain tissue