A new rheological index of blood deformability

J. Pradére Department of Medical Biophysics, U.P.S. Paul Sabatier chemin du Vallon Toulouse, France

A. Bru Department of Medical Biophysics, U.P.S. Paul Sabatier chemin du Vallon Toulouse, France

H. Régis Department of Medical Biophysics, U.P.S. Paul Sabatier chemin du Vallon Toulouse, France

J. Mauss Department of Rheology, U.P.S. Paul Sabatier chemin du Vallon Toulouse, France

Abstract

Analysis of blood rheogram obtained by means of a Taylor-Couette rheometre (RV 100-CV 100) enabled us to define a new rheological index of blood deformability named δ, the unit ‘s^-1’.

It corresponds to a shear rate for which the shear thinning effect provides blood with a quasi-Newtonian behaviour.

With 64 controls, this index and the other parameters of the rheogram have been calculated according to a structural rheological law.

This δ index is independent from the other parameters. Variations of the δ index can be observed among strokes and among pentoxyfillin-taker controls.

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A new rheological index of blood deformability

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A new rheological index of blood deformability

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