血粘度与脑血流量及脑梗塞的关系是近年脑血管病研究的一个热门课题,有大量的实验研究和临床观察报告。在不少问题上也存在较大争论。本文试就以下几个重要方面作概括介绍和评述。 血粘度及其影响因素 粘度是表示流体流动性的物理量。粘度可定义为液体内各平行的相邻流层相对运动的内摩擦力,这个内摩擦力使相邻流层间产生的速度差叫作切变率 Blood viscosity and cerebral blood flow and cerebral infarction in recent years, the study of cerebrovascular disease is a hot topic, a large number of experimental studies and clinical observation report. There are also many controversies on many issues. This article tries to make a general introduction and comment on the following several important aspects. Blood viscosity and its influencing factors Viscosity is a physical quantity that indicates the fluidity of a fluid. Viscosity can be defined as the internal friction of the relative motion of parallel adjacent fluid layers in the fluid. This internal friction forces the velocity difference between adjacent fluid layers to be called the shear rate