[Methodical investigations concerning the measurement of red cell deformability dependent on plasma viscosity, plasma proteins, hematokrit, filtration pressure as well as osmolarity (author's transl)].

The measurement of red cell deformability (flexibility or fluidity) according to the method of filtration strongly depends on the suspension medium, the hematokrit, filtration pressure as well as osmolarity and is hard to differentiate over the influence of red cell aggregation. Therefore, data concerning the flexibility of red cells have to be established under standardized conditions, e.g. suspension medium, such as albumin, stabilized hematokrit, constant osmolarity and pressure.