so ERCP is a invasive test done under anesthesia the full form of ERCP is endoscopic retrograde colangio pancreattography he in this case we go to the bile duct through the diodinum in endoscope then uh see the bile duct anatomy and uh with colangio then we cut open the distal end of the bile duct to remove the uh stones and if there is any stricture to put uh strains inside the bile duct for drainage of the bile this will relieve the uh obstruction of the bile uh causing jaundice and uh relieving the symptoms so if patient is suffering from all these symptoms like jaundice indigestion pain ab...