The actions of physico-chemical mechanisms of low power light, applied in medicine are discussed. The investigations were prepared both in experiment on laboratory animals and in emergency-care clinics, where I worked with physicians as the theory-investigator. In this message I propose the theory of permeability increasing effects of low power light. Proton- permeability increasing effects on membranes go to the bioenergetic mechanism of low power light action. Sodium-permeability increasing effects on excitable membranes go to the reflex mechanism of low power light action. We suppose the medical mechanism of laser irradiation effects on the blood to be connected with water-permeability increasing effects because of blood cell membrane depolarization and shaking. We measured the dependence of red blood cell membrane water-permeability coefficient upon the low power light irradiation wavelength in the range 625 - 645 nm. So it was proved that He-Ne laser irradiation with 633 nm wavelength excites dissolved molecular oxygen from the ground triplet state to the singlet state. Fast relaxation of singlet oxygen to triplet state in water medium near membrane with the time 10^-6 sec go to the membrane purification mechanism of low power light action.

Date Published: 15 January 1996
PDF: 6 pages
Proc. SPIE 2630, Effects of Low-Power Light on Biological Systems, (15 January 1996); doi: 10.1117/12.230029

Published in SPIE Proceedings Vol. 2630:
Effects of Low-Power Light on Biological Systems
Tiina I. Karu; Anthony R. Young, Editor(s)