ОЦЕНКА ХАРАКТЕРА МИКРОЦИРКУЛЯТОРНОГО ОТВЕТА НА ЭКСПЕРИМЕНТАЛЬНУЮ ТЕРМИЧЕСКУЮ ТРАВМУ

Abstract

Burn disease affects the functioning of almost all functional systems, having a negative effect on them due to the development of endotoxicosis and vascular disorders. At the same time, the greatest attention is paid to the shifts that form in the systemic hemodynamics, primarily in the coronary and pulmonary blood flow, which can cause the development and progression of life-threatening conditions. At the same time, the microcirculatory system is also undergoing changes, but these changes have been studied in much less detail. The aim of this research was to study the state of skin microcirculation in healthy and burned rats. The experiment was carried out on 20 adult male Wistar rats divided into two equal groups. The first group of animals (n=10) was a control group (intact), with its representatives there were not any manipulations, except for a single study of the state of microcirculation. Rats of the second (main) group (n=10) were simulated contact thermal burn using their own patented method. The assessment of microcirculation parameters in the main group of animals was carried out by laser Doppler flowmetry on the device "LAKK-M" on the 1st day (2-3 hours after the injury), on the third and tenth days after the burn period. It was found that thermal injury has a negative impact on the microcirculation system, which is seen in a decrease in the intensity of blood flow through small-diameter vessels. This is achieved by reflex vasospasm, reducing the release of nitrogen oxide by endothelial cells and activating precapillary sphincters, and simultaneously activating the shunting ways of cardiac shunt from the arterial directly to the venous channel, bypassing the capillaries. Thus, in the post-thermal period, a compensatory "robbing phenomenon" is realized in the border zone of the burn, which requires pathogenetic correction.