Abstract
It has passed seven years since the first report about peroral cholangioscope by Takekoshi and Takagi. Recently, several types of peroral cholangioscope, which had forceps channel for the treatment, has been made. However, the success rate of insertion of these instruments into the common bile duct was less than 50%. Therefore, we made a new scope by courtesy of Fuji Photo Optical Co. Ltd., for the purpose of easy insertion into the common bile duct. This scope is provided with 105° wide view and 7.5° oblique view, 180° up angle and 30° extra up angle, and 2 mm diameter of forceps channel in order to get good orientation in the duodenum, front view and close observation of the duodenal papilla, which makes possible easier insertion into the common bile duct. We have performed peroral cholangioscopy by using this double angle, oblique view scope in 7 cases of bile duct stone, and succeeded in insertion into the common bile duct in 6 cases. It is concluded that this new scope was useful in bascket removal of stone or differential diagnosis between stone and cancer of the biliary tract.
