Affiliations: Laboratoire de Biophysique, Faculté de Médecine Pitié Salpêtrière, 91 boulevard de l’Hôpital, 75013 Paris, France
Note: [1] Third International Congress of Biorheology
Note: [*] Unité INSERM n°13, Hôpital Claude Bernard, 10 avenue de la Porte d’Aubervilliers. 75019 Paris. France.
Note: [**] Service de Biophysique, UER Médicale, 30 rue Ferdinand Gambon, 42000 St Etienne. France.
Note: [] Accepted by: Editor G.V.F. Seaman
Abstract: A Couette type servo-controlled microviscometer associated with a low frequency generator modulating the rotational speed of the viscometer outer cylinder has been used to plot the rheological hysteresis curves of blood. It has been shown that the shape of these curves largely depends on the values of the parameters α and tm characterizing the linear variation of the rate of shear with time: γ˙=αt for 0<t<tm and γ˙=α(2tm−t) for tm<t<2tm. Two sets of α and tm have been selected in order to obtain rheograms showing preferentially the viscoelastic or the thixotropic behaviour of blood. This technic is used to compare normal human bloods with bloods submitted to various physical or chemical treatments, or with different pathological bloods. Some interpretations are proposed from considerations on changes in the deformability or aggregability of blood cells.
DOI: 10.3233/BIR-1980-171-221
Journal: Biorheology, vol. 17, no. 1-2, pp. 191-203, 1980
