[Alterations in blood- and plasma-viscosity of patients with risk-factors (author's transl)]

In a series of tests, performed on patients with the risk-factors smoker and adiposity, a comparison with normal persons revealed a statistically significant hyperviscosity in plasma and whole blood for smokers and overweight patients. When both risk-factors occurred simultaneously, the blood- and plasma-viscosity displayed a distinctly additive increase. Furthermore, female patients taking contraceptives showed a significantly increased plasma- and blood-viscosity when comparing them with a group of normal persons. In a group of pregnant women, hyperviscosity could not be secured statistically.