Endoscopic removal of bile duct stones after endoscopic balloon dilation of the biliary sphincter

Left: EN = endoscope positioned in descending duodenum; BD = bile duct filled with contrast, two bile duct stones visible; DB = dilation balloon placed in bile duct opening after passage over a guidewire (white arrow) and inflated with dilute contrast - biliary sphincter is seen as a "waist" in the balloon (black arrows). Middle: biliary sphincter adequately dilated if "waist" in balloon has completely disappeared. Right: after removal of bile duct stones.