Temporal dynamics of blood microcirculation in oral cavity mucous membrane, caused by low-intensity laser irradiation at the wavelength 630 nm

Abstract

Influence of laser irradiation on the statement of blood microcirculation in mucous membrane of human oral cavity has been investigated. Speckle methods and Doppler diagnostics have been used for investigation of temporal fluctuation of velocity of blood microcirculation. Pulse waves (low temporal changes of hemodynamics) have been studied by methods of laser photoplethysmography. Influence of coherent light (at the wavelength 630 nm) on the intensity of microcirculation in the capillary net of mucous membrane has been demonstrated directly during the short-time session of laser therapy. It is shown that during the session of laser therapy it is expedient to use first-order frequency-weighted spectral moments of Doppler signal for evaluation of the effects of laser irradiation on the intensity of microcirculation in human oral cavity mucous membrane. Preliminary investigations, involving the objective methods of monitoring the statement of microcirculation, show that coherent light can cause the slight enhancement of intensity of microcirculation during the short sessions of laser therapy. Effect of lasers on the blood saturations is not reliably observed.