FIELD: medicine. ^ SUBSTANCE: one should evaluate morphological signs of blood serum: the area of peripheral region, the number of fissures and crystallization region, and ultrasound features, as well: the structure of cholecyst's wall, choledochus' diameter, availability of free liquid in abdominal cavity and hemodynamics in cholecyst's wall in points according to certain criteria. According to the sum of points a patient should be referred to the group of low risk for the development of complications to carry out repeated investigation in 6-8 h, or to the group of moderate risk for the development of complications to carry out repeated investigation in 3 h, or to the group of high risk for the development of complications being an indication for conducting urgent operation. The innovation provides earlier detection of complicated flow of chronic calculosis cholecystitis and helps to carry out correction of curative algorithm in due time. It, also, improves results of therapy and shortens the terms of rehabi
