A normal hepatobiliary ultrasound typically indicates a lower probability of bile duct obstruction. Ultrasound can help detect symptoms of bile duct obstruction, such as invisible extrahepatic bile ducts, an empty gallbladder, and sometimes liver enlargement. If bile duct obstruction is suspected, it is recommended to undergo bilirubin tests and bile duct imaging among other checks. If a child is diagnosed with bile duct obstruction, they should be immediately referred to a tertiary hospital for treatment to prevent liver function impairment.