ABSTRACT
Objective To evaluate the diagnostic value of intraductal ulstrasonography(IDUS)in non-opaque bile duct stones.Methods Between January 2009 and August 2010 in the Department of Gastroenterology at Shanghai 10th People's Hospital,a total of 183 patients(male:102 cases,mean age 69 years； female:81 cases,mean age 71 years)were enrolled,who were suspected of bile duct stones or stenosis which could not be diagnosed by abdominal CT,MRI,and abdominal B-mode ultrasound.All the patients underwent endoscopic retrograde cholangiopancreatography(ERCP)first,and then patients with non-opaque bile duct stones followed by IDUS.Results A total of 134 cases (73.2％)of bile duct stones were diagnosed by ERCP,49 cases(26.8％)were negative.And then the 49 patients underwent IDUS,of whom 24 patients with sand-like stones,11 patients with lowdensity stones,6 patients with ampullary cancer,2 patients with pancreatic cancer,6 patients with sclerosing cholangitis.The diagnostic accuracy of IDUS in the position and quality of bile duct stones was 100％,higher than that of ERCP,which was 80％.After ERCP,pancreatitis occurred in 3 patients and improved after conservative treatment,there was no complications like perforation and bleeding.Conclusion The diagnostic accuracy of IDUS in the position and quality of bile duct stones is high,which can make up for the misdiagnosis by ERCP without increasing the complications.IDUS can provide reliable basis for the diagnosis of clinical bile duct stones.