Balloon Catheter vs. Basket Catheter in Pancreatic Duct Stone Clearance

Inclusion Criteria: * CP patients with main pancreatic duct (MPD) stones who underwent ERCP Exclusion Criteria: * Patients had undergone pancreatic surgery or gastrectomy with Billroth II reconstruction prior to the ERCP procedure * Patients were suspected of having a malignant tumor * Patients combined with bile duct stones * Patients had severe pancreatic duct structure * Patients with insufficient clinical data * Patients with previous ERCP treatment * Patients had received both catheters