RESUMO
The article gives our own experience in the determination and study of additional laboratory criteria (total lipids, cholesterol, maximum and area chemiluminescence, antioxidant activity) at the local level (in bile) in patients with bile duct obstruction of malignant etiology. Constellation of metabolic disorders allowed to propose an original method for determining the lithogenicity of bile (integral indicator of lithogenicity). The obtained data made it possible to justify the need to assess the degree of metabolic disturbances in bile, on the basis of which it is possible to predict the risk of lithogenesis and the duration of stent operation, which in turn helped optimize the algorithm for choosing the method of bile ducts decompression aimed at preventing early obturation of endoprostheses.