when common bile duct is dilated what happens
âCommon bile duct is dilatedâ. Common Bile duct is part of the âplumbingâ that drains the secretion of the liver (bile) into small bowel (duodenum). The size of the common bile duct, if dilated, may suggest a blockage downstream. This is a specific finding that is looked for when a patient gets an ultrasound for a suspected liver or Gallbladder disease. When a patient has their gallbladder removed, the common bile duct dilates over some time.