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Orientation and Deformation of Erythrocytes in Flowing Blood
Author(s) -
FUJII MAMIKO,
NAKAJIMA KENGO,
SAKAMOTO KATSUYUKI,
KANAI HIROSHI
Publication year - 1999
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.1999.tb09473.x
Subject(s) - anisotropy , deformation (meteorology) , electrical resistivity and conductivity , materials science , coaxial , orientation (vector space) , blood flow , shear (geology) , flow (mathematics) , blood cell , scattering , mechanics , shear flow , composite material , geometry , chemistry , optics , physics , mathematics , biology , electrical engineering , medicine , quantum mechanics , genetics , engineering
A bstract : The effects of flow on the changes of electrical resistivity and light‐scattering characteristics of blood are experimentally and theoretically discussed. Studies indicate that most erythrocytes deform and orient themselves in the flow direction when blood flows in a conduit. Such oriented blood shows anisotropic properties. Anisotropic electrical resistivity of flowing blood is measured in three rectangular directions with a measurement cell of coaxial cylindrical type. From these experimental results, the orientation and deformation of erythrocytes are discussed. The orientation ratio and the deformation are calculated using a simplified spheroidal model of an erythrocyte. Calculated results show that the fractions of erythrocytes with their short axis parallel to each direction and the equivalent axis ratio for a simplified spheroidal model change with the shear rate of flow.