“…Two previous case reports have demonstrated that portal venous gas is able to traverse a patent ductus venosus and cause a pulmonary gas embolism [18,19]. Air embolism has also been observed in patients undergoing endoscopic retrograde cholangiopancreatography or liver biopsy, situations in which fistulas between the biliary, portal, and venous systems can be created [20]. Although these are possibilities, the patient's complete recovery and lack of significant medical history makes them less likely.…”