The study of the rheological properties of blood (blood viscosity) is based on the study of the viscosity of whole blood at different shear rates, plasma viscosity, aggregation (sedimentation rate) of erythrocytes, and the deformability of erythrocytes.
Measuring blood viscosity is a key step in making an accurate diagnosis. Viscosity measurement and rheology are closely linked—blood viscosity is the basis of rheological studies in medicine. Blood viscosity, in turn, depends on hematocrit, plasma protein concentration, and blood flow velocity.
When measuring viscosity in most rheological disorders, a phenomenon called erythrocyte aggregation has been identified, which coincides with an increase in blood viscosity. This phenomenon is also characterized by a slowdown in normal blood circulation.
Modern blood viscosity testing devices quickly and accurately determine current levels, enabling timely patient decisions.
It is important to remember that aggregation tends to “block” thin capillaries, which disrupts microcirculation and causes ischemia in the area of tissue that does not receive adequate blood supply.