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  • Title: Measurement of erythrocyte orientation in flow by spin labeling III--erythrocyte orientation and rheological conditions.
    Author: Bitbol M, Leterrier F, Dufaux J, Quemada D.
    Journal: Biorheology; 1985; 22(1):43-53. PubMed ID: 3986318.
    Abstract:
    The measurements of erythrocyte orientation, obtained through a spin labeling technique, are compared with a phenomenological model. Several rheological conditions are varied: hematocrit, suspending medium viscosity, blood age, artificial reversible aggregation. We found that the onset of orientation is very sensitive to any variation of these conditions, and that its measurement would be a good method to assess erythrocyte deformability. A critical shear rate for the orientation process is then determined and compared to the corresponding parameter obtained from viscosity measurements of identical suspensions. A close qualitative relationship is found between the two sets of values of the critical shear rate.
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