Abstract: Aim: was to identify features of echographic imaging in patients with suspicion on nonocclusive mesenteric blood-flow disorders. Materials and methods: we analyzed ultrasound data of 50 patients with dynamic ileus (DI). Patients with severe bulging of the transverse colon and the presence of free gas in the abdominal cavity were not included into the research. All patients underwent ultrasound examination. We evaluated the functional and morphological state of small intestine and colon, celiac trunk and the superior mesenteric artery (SMA). We also examined intraorganic blood flow in walls of small intestine and colon with the determination of the resistance index (RI) and the linear velocity of blood flow. The ultrasonic data was verified in 34 cases intraoperatively and morphologically, in 12 cases - only morphologically. Colonoscopy was performed in 4 patients whose ultrasound differential diagnosis between nonocclusive blood-flow disorders in colon walls and pseudomembranous colitis. Results: in 3 cases nonocclusive blood-flow disorder was not confirmed. Based on endoscopic and bacteriological data we revealed pseudomembranous colitis (PMC). In 1 patient with ultrasound signs of inflammatory changes in walls of the descending colon at colonoscopy revealed necrotizing ulcerative colitis and suspected circulatory problems in the intestinal wall. It was morphologically identified that 24 patients had nonocclusive blood-flow disorders in walls of the small intestine,10 patients had nonocclusive segmental infarction of small intestine and colon, in 12 patients had nonocclusive segmental infarction of colon. Conclusion: ultrasound study, conducted in dynamics, in patients with DI, reveals inflammatory and ischemic changes in walls of the small intestine and colon, which provides an abillity to choose the optimal method of treatment of these patients, in some cases predicted for the pathological process. Absolute symptoms of nonocclusion ischemia of intestine during ultrasound mode in colour doppler imaging (CDI) are: violation of diameter, lack or absence of blood flow in intraorganic walls of the affected intestine while maintaining its mesentery tissue, in a number of patients - bubbles of gas in the intestinal wall. An indirect sign of circulatory disorders of the small intestine is a complex of ultrasonic signs as an extension of its diameter with liquid contents, wall thickening by submucosal edema, mucosal folds flattening and lack of peristalsis. An indirect sign of circulatory disorders of the colon during US is identification of a fragment of the colon with thick walls layered structure haustrum smoothness, lack of blood flow in the structure of the wall in the presence of it in the mesentery When comparing ultrasound, endoscopic and morphological data, in some cases it is possible to make differential diagnosis between nonocclusive intestinal blood-flow disorder and pseudomembranous colitis.
