Kinetics of oxygenation of skin tissue exposed to low-intensity laser radiation

We present the results of modeling the action spectrum and an experimental investigation of the effect of laser-induced photodissociation of oxyhemoglobin in vivo on the increase in the degree of oxygenation of skin tissue in the exposed area. We have shown that controlling the local concentration of free molecular oxygen in biological tissues together with the possibility of eliminating tissue hypoxia using laser radiation makes it possible to stimulate aerobic cell metabolism and to achieve the needed therapeutic effect. __________ Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 74, No. 1, pp. 120–125, January–February, 2007.     

Laser-Induced Photodissociation of Carboxyhemoglobin for the Purpose of Treatment of an Organism Poisoned with Carbon Monoxide

The action spectra of the complex of hemoglobin (Hb) with the ligand CO in cutaneous blood vessels have been determined. It is proposed to use the photodissociation of the HbCO complex for elimination of the poisoning action of the CO gas. __________ Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 72, No. 3, pp. 422–424, May–June, 2005.     

Effect of cyclooctatetraene on the laser properties of rhodamine 6G solution under flashlamp excitation

The metastable level lifetime of rhodamine 6G in ethanol solution was measured by a dye laser with and without a cyclooctatetraene additive. In contrast to the existing ideas it was shown that the presence of cyclooctatetraene not only fails to decrease but on the contrary increases the lifetime τ_T of this dye. The improvement observed in the oscillation properties is expected to be connected with the decrease of the interconversion rate in a rhodamine 6G molecule when it is surrounded by a shell of the cyclooctatetraene molecules.     

Minimum opaque manifolds

For various manifolds, we consider the problem of finding the set of minimum measure which intersects every geodesic.      

Laser optical method of visualizing cutaneous blood vessels and its applications in biometry and photomedicine

We propose and examine a new approach to visualizing a local network of cutaneous blood vessels using laser optical methods for applications in biometry and photomedicine. Various optical schemes of the formation of biometrical information on the architecture of blood vessels of skin tissue are analyzed. We developed an optical model of the interaction of the laser radiation with the biological tissue and a mathematical algorithm of processing of measurement results. We show that, in medicine, the visualization of blood vessels makes it possible to calculate and determine regions of disturbance of blood microcirculation and to control tissue hypoxia, as well as to maintain the local concentration of oxygen at a level necessary for the normal cellular metabolism. We propose noninvasive optical methods for modern photomedicine and biometry for diagnostics and elimination of tissue hypoxia and for personality identification and verification via the pattern of cutaneous blood vessels.     

Spectrum of the effect of laser radiation on hemoglobin of the blood vessels of skin

We suggested and consider the primary mechanism of biostimulation and of the therapeutic effect of low-level laser radiation caused by a local increase in the effectiveness of oxygen transfer by oxyhemoglobin of the blood vessels of skin. The spectra of the effect of laser radiation on oxyhemoglobin and hemoglobin of the blood vessels of skin are presented which were obtained using a method of numerical simulation with allowance for the optical characteristics of skin and for the depth of penetration into it of radiation of different wavelengths. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 65, No. 6, pp. 877–860, November–December, 1998.