Early Pancreatic Stent Placement for Preventing PEP

Exclusion Criteria

• •Participants who meet any of the following criteria will be excluded: 1. unreachable main papillae; 2. surgically altered gastrointestinal anatomy; 3. concurrent acute pancreatitis; 4. biliary cannulation over pancreatic duct stent after precut sphincterotomy or wire-guided method (native early attribute); 5. failed biliary cannulation; 6. severe active cardiopulmonary disease; 7. breastfeeding or pregnancy; 8. ampullary tumour.