1. Pathological diagnosis of pancreatic head cancer, or clinical diagnosis of pancreatic head cancer after multidisciplinary discussion, clear presence of obstructive jaundice caused by pancreatic head tumor, and planned to undergo radical pancreaticoduodenectomy
2. Preoperative imaging stage is resectable
3. Baseline serum total bilirubin ≥ 250μmol/L, and no history of preoperative biliary drainage
