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Science 22 May 1970:
Vol. 168. no. 3934, pp. 977 - 979
DOI: 10.1126/science.168.3934.977
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Articles
Shear Dependence of Effective Cell Volume as a Determinant of Blood Viscosity
Shu Chien 1
1 Laboratory of Hemorheology, Department of Physiology, Columbia University College of Physicians and Surgeons, New York 10032
The viscosity of suspensions of human erythrocytes (normal cells in plasma, normal cells in Ringer's solution containing albumin, and hardened cells in Ringer's solution containing albumin) was measured over a wide range of shear rates, and the macrorheological data were correlated with the microrheological behavior of erythrocytes and rigid particles. The formation of rouleaux increases the effective volume of erythrocytes as a result of (i) the increase in axial ratio and (ii) the limitation of deformation of individual erythrocytes. The effective cell volume is the fundamental determinant of blood viscosity.
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