Efficacy of ERCP in the Diagnosis and Treatment of Idiopathic Recurrent Acute Pancreatitis

Participants will undergo ERCP and indomethacin will be administered rectally before procedure in participants with no known allergy to indomethacin. If the etiology of the participant is clearly defined during ERCP, the corresponding endoscopic treatment procedure will be performed. For others whose etiology are still unclear, pancreatic sphincterotomy and small caliber prophylactic pancreatic duct stent replacement will be performed. The participants will be observed closely after ERCP and record complications. Abdominal X-rays will be taken 2 weeks after ERCP to confirm spontaneous passage of the pancreatic duct stent, and the stent will be removed via gastroscopy if it still in place.

Participants will be given health education and conservative management of clinical routines. Clinical management is based on the pancreatic endocrine and exocrine function.