Introduction. Enteral insufficiency syndrome accompanies the development of many acute diseases of the abdominal cavity. According to statistics, as a result of advanced and multi-organ surgery in oncosurgery for 2019–2020, enteral insufficiency was a complication in 39 % of all cases, regardless of anatomical and physiological area, and complications such as hepatorenal syndrome – in 50–80 % cases. The aim of the work is to study the effectiveness of correction of hepatorenal syndrome on the background of enteral insufficiency in cancer patients after multiorgan surgery. To do this, we used the method of indirect electrochemical detoxification with a solution of sodium hypochlorite. Materials and methods. 71 patients with oncopathology who underwent multiorgan surgery in different anatomical and physiological areas were examined. Patients were divided into two groups: the main group (n = 36), in which indirect electrochemical detoxification was performed with sodium hypochlorite solution at a concentration of 0.03 ; the comparison group (n = 35) – treatment was carried out according to standard schemes. The groups were compared by age and anatomical and physiological areas that were operated on (surgery was performed on the chest and mediastinum and abdominal organs). Results and discussion. For the treatment of patients with enteral insufficiency used the method of electrochemical detoxification with sodium hypochlorite, which reduces the indicators that reflect blood toxicity and the degree of intoxication. This was evidenced by a decrease in the concentration of bilirubin by 23.1 %, urea by 20.6 %, creatinine by 23.4 %, ALT by 57.2 % alkaline phosphatase by 69.5 %. When using this method for the third day managed to get a detoxifying effect. Conclusions. The expediency of including sodium hypochlorite in the complex postoperative therapy is shown. This is proved by the results of a comprehensive study of cancer patients after multiorgan surgery with the development of hepatorenal syndrome on the background of enteral insufficiency. It was found that the use of infusions of 0.03 % NaClO solution has a detoxifying effect: significantly reduces elevated concentrations of bilirubin by 23.1 %, creatinine by 20.6 %, urea by 23.4 %, improves the rheological properties of the blood. Therefore, given the relatively low effectiveness of conservative and insufficient availability of surgical treatment along with high mortality, prevention of hepatorenal syndrome in patients with enteral insufficiency by indirect electrochemical detoxification can significantly reduce its incidence.