Comparative study of intraductal ultrasonography and endoscopic retrograde cholangiography on diagnosis of extrahepatic bile duct stones / 中华消化内镜杂志

ABSTRACT

Objective To compare the diagnostic accuracy of intraductal ultrasonography(IDUS) and endoscopic retrograde cholangiography(ERC) on extrahepatic bile duct stones. Methods 30 patients with suspected extrahepatic bile duct stones by B Ultrasonography, CT,or MRI,were allocated into this study. ERC was performed first by the use of Fujinon duodenal endoscopy ( ED-410XT, ED-410XU) and then followed IDUS by inserting the Fujinon miniprobe (PL2220-15 or PL2226-15) through endoscopic working channel to detect extrahepatic bile duct, finally the substance in extrahepatic bile duct was proved by endoscopic sphincterotomy(EST)and stone extraction. Results Among 30 cases, the diagnoses by ERC were stone 26 cases,floccule 1 cases and misinterpreted 2 cases so the accuracy and sensitivity of ERC were 26/30(86.7%) and 26/28(92.9%)respectively. For IDUS, the diagnoses were totally in accordance with the results of EST and stone extraction.So the accuracy and sensitivity of IDUS in the diagnosis of extrahepatic bile duct stones were 30/30(100%) and 28/28(100%) respectively. Conclusion (1) IDUS was superior to ERC in the diagnosis extrahepatic bile duct stones. (2) IDUS can compensate the misinterpretation of ERC on extrahepatic bile duct stones.