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Burn disease is a complex of pathological changes that occur in the body due to the action of a thermal agent and are life-threatening. The problem of skin burns still remains relevant today. Insufficiently studied features of pathogenesis and methods of treatment of thermal trauma are the cause of considerable interest of scientists in this problem. The aim is to study the features of microscopic changes in the skin of rats during the month after grade II-III burn on the background of the introduction of the first 7 days of 0.9% NaCL solution. The studies were performed on 360 laboratory white male rats weighing 155-160 g. During the experiment, the animals were divided into 4 groups: 1st, 2nd groups – rats without thermal trauma infused with 0.9% NaCl solution and HAES-LX-5% at a dose of 10 ml/kg. In the 3rd, 4th groups, rats were infused with 0.9% NaCl solution and HAES-LX-5% at a dose of 10 ml/kg after skin burns. Burning skin damage was caused by applying to the lateral surfaces of the trunk of rats for 10 seconds four copper plates, heated in water at a constant temperature of 100°C. Histological preparations were prepared by standard procedure and examined using an OLYMPUS BH-2 light microscope. Conducted microscopic studies of the skin of animals after thermal trauma under the conditions of application of 0.9% NaCl solution found that in the early stages of the experiment (1, 3, 7 days) compensatory and adaptive changes of its structural components are combined with signs of destructive disorders. In the later periods of thermal trauma (14, 21 and 30 days), the destructive changes of the structural components of the skin in the lesion area deepen, and the process becomes irreversible.

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Histological picture in the skin of rats within a month after burn II-III degree against the background of the introduction for first 7 days 0.9% NaCl solution