Patient Question:Disease:57 years old did gallstones ERCP bile duct stone surgery, nasal drainage tube no liquid Description:Nasal drainage tube basically no liquid outflow, would like to consult the reason Hope to provide help:Nasal drainage tube no liquid outflow, reasons Li Chujun, Gastroenterology Endoscopy Center, The Sixth Hospital of Sun Yat-sen University Reply: Possible reasons for nasal bile duct no bile outflow after ERCP stone extraction: 1. Bile flows out from the papillary opening but not from the nasobiliary duct; 2. Obstruction of the nasobiliary duct. If the nasobiliary duct is obstructed and the papillary opening is not accessible, then there are symptoms related to bile duct obstruction, such as jaundice and cholangitis symptoms.