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在人体内物质转运的速度,按照 Poiseuillc 流体力学定律,取决于心功能、血管的几何形状和血液的流变性。而血液的流变,即血液粘度又受到3大因素影响:①血液有形成分,主要是红细胞浓度的高低;②红细胞的变形能力的大小;③红细胞的聚集和分散的程度.作者为了研究慢性呼吸衰竭和继发性红细胞增多症的血液流变学的特点,对5例至少有3年以上的呼吸衰竭病史的患者进行了全血粘度、血浆粘度、血球压积以及 PaO_2和 PaCO_2测定,并同时对10例健康人进行了对照。
The rate of material transport in humans, according to Poiseuillc’s law of fluid mechanics, depends on cardiac function, blood vessel geometry, and blood rheology. The blood rheology, that is, the blood viscosity is affected by three factors: ① blood tangible components, mainly the level of red blood cell concentration; ② the size of erythrocyte deformability; ③ the degree of aggregation and dispersion of red blood cells. Respiratory failure, and secondary polycythemia, whole blood viscosity, plasma viscosity, hematocrit, PaO 2 and PaCO 2 were measured in 5 patients with a history of respiratory failure for at least 3 years At the same time, 10 healthy people were compared.