The composition of blood was evaluated (parameters of blood clinical analysis, figures of lipid peroxidation processes and system of antioxidant protection, traditional biochemical blood parameters, total proteolytic activity and peptides of blood plasma, quantity and activity of some parameters of humoral immunity) in patients with late stages of peripheral atherosclerosis. It was showed that chronic endotoxicosis appeared in these patients. The processes of chronic endotoxicosis are compensated in patients with the 3-d stage of low extremities ischemia. The quantity of endogenic toxins and markers of endogenic intoxication increased in patients with the 4-th stage of ischemia and loading on the system of detoxication was enlarged; and as a result, compensation reserves of detoxication system of organism decreased.
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