[Technic of optical mixing spectroscopy in the diagnosis of blood microcirculations]

Optical mixing spectroscopy was used to measure the correlation function of helium-neon laser light (wavelength 0.633 micron) scattered in the finger skin. The mean blood flow velocity was evaluated from the data obtained. It was shown that application of the method to the diagnosis of blood microcirculations demands that vascular reactions of laser light be taken into consideration. In most cases the mean blood velocity was observed to rise 1.5-3-fold within the first-second minute of irradiation at 0.6 W/cm2.