FIELD: medicine. SUBSTANCE: method includes measurement of Doppler ultrasonic signal reflected from erythrocytes of blood flowing in vessel being examine. Then measured spectrum is compared with number of reference spectra measured at definite viscosity of blood in given vessel. Value at which reference spectrum coincides with measured one best of all is taken for efficient viscosity. EFFECT: noninvasive examination. 3 dwg, 1 tbl, 1 ex
