We hope to better define the association between opiate use and biliary dilation, which was evident in our previous retrospective study. This prospective study including all endoscopic ultrasound procedures performed for further evaluation of biliary dilatation in the setting of bilirubin <2 mg/dL will enable accurate measurement of common bile duct and pancreatic duct diameter using endoscopic ultrasound and identification of other non- obstructive factors which may modulate biliary dilation (i.e. age, cholecystectomy status, duration and type of opiate used).~We believe this work will be of great interest to gastroenterologists, as it provides additional data for interpretation of isolated common bile duct dilation in asymptomatic patients.
We hope to better define the association between opiate use and biliary dilation, which was evident in our previous retrospective study. This prospective study including all endoscopic ultrasound procedures performed for further evaluation of biliary dilatation in the setting of bilirubin <2 mg/dL will enable accurate measurement of common bile duct and pancreatic duct diameter using endoscopic ultrasound and identification of other non- obstructive factors which may modulate biliary dilation (i.e. age, cholecystectomy status, duration and type of opiate used).