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Linear array electronic real-time ultrasonography proved to be useful for the diagnosis of obstructive changes of the bile ducts and differential diagnosis of jaundice.Forty control subjects and 83 patients with biliary tract diseases constituted the groups not associated with jaundice, and 142 patients with obstructive jaundice and 33 patients with hepatic diseases made up the jaundiced groups.The bile ducts were visualized in all of the control subjects and the diameters less than 5.5mm. In the patients with hepatic diseases, diameters of the bile ducts were the same as those in the control. In the patients with obstructive changes of the bile ducts, they were significantly dilated. In patients with bile duct stones but not jaundiced, they were dilated from 5 to 15 mm.In patients with jaundice due to obstructive diseases of the bile ducts, sites and ends of the obstructing lesions were demonstrated with a high success rate, and most of the lesions were correctly diagnosed.
財団法人日本消化器病学会の論文