The authors analyze results of the investigation of hemodynamics in the abdominal cavity vessels by the method of duplex scanning in 30 patients with acute cholecystitis, in 30 patients with mechanical jaundice and cholelithiasis and in 30 healthy subjects. It was found that these patients had less blood flow along the upper mesenterial artery and the portal vein. As a compensation the blood flow increased along the hepatic artery.