[Photomodification of blood by laser and ultraviolet radiation: a comparative study].

The efficiency of in vivo blood irradiation by a laser light source (λ = 632.8 and 670 nm) and a mercury lamp (UV light, λ = 254 nm) was compared. Absorption spectra, gas content, oxyhemoglobin content, hemoglobin oxygen saturation, concentrations of lactate and glucose were studied for both irradiated and control samples. Hemoglobin was assumed to be the primary photoacceptor of light radiation for the indicated wavelengths. No substantial differences have been found between the effects of laser and non-laser irradiation. We conclude that the biological impact of the procedure is related to photoinduced changes in hemoglobin oxygen saturation.

[Involvement of hemoglobin in the therapeutic action of blood ultraviolet irradiation].

The objective of this work was to study the mechanism of therapeutic action of extracorporeal ultraviolet irradiation of circulating blood and to evaluate the possibility of its application to combined treatment of patients with acute coronary syndrome. It was shown that ultraviolet irradiation causes photodissociation ofoxyhemoglobin thereby altering the oxygen-carrying function of the blood and improving oxygen supply to cells and tissues. The UV-induced modification of blood properties not only prevents tissue hypoxia but also triggers a cascade of metabolic processes. Taken together, these effects have beneficial influence on the clinical course of cardiovascular and other diseases.