Normal and Obstructed Main Bile Duct Evaluated by a Modified Ultrasound Technique

Abstract

A modified ultrasound technique for demonstration of the extrahepatic bile duct was used in 75 patients and 135 normal subjects. The right and left hepatic ducts, common hepatic duct, and on occasion a part of a dilated cystic duct could be demonstrated with a rate of success of 100 per cent in patients and 98.5 per cent in normal subjects. Usually, the biliary tract can be demonstrated only in part in the conventional supine position, while the modified technique often improved the demonstration of the entire duct and in some cases of a main bile duct that cannot be evaluated in the conventional supine position.

Ultrasonic diagnosis of primary intraductal cholelith and neoplasm

“…Ultrasonic search in each case delineated the lesion as stone or carcinoma of bile duct. This report emphasizes the accuracy of our modified ultrasonic technique [2] in demonstrating the space-occupying lesions of the extrahepatic bile duct and their locations. …”

“…Gray-scale ultrasonography has been shown to be useful in differentiating obstructive from nonobstructive jaundice [1][2][3][4][5][6]. Primary extrahepatic bile duct stones and neoplasms, due to their rather rare occurrence, have received little attention in the ultrasound literature [7,8 ].…”

“…The ultrasonographic unit utilized was a commercially available digital scan converter. The patients were examined by modified ultrasonic technique in left lateral decubitus 900-30 ~ position [2]. Each was kept in the left lateral decubitus whereby the trunk formed a right angle with the table, and the scanning arm facing the abdominal wall made a 30 ~ angle with it.…”