Abstract:Objective To analyze and evaluate the effect of ERCP and risk factors of complications resulted from ERCP in elderly patients with choledocholithiasis.Methods 300 elderly patients with choledocholithiasis were recruited from March 2019 to May 2020, whose clinical data were collected to analyze the effect of ERCP and risk factors of complications resulted from ERCP.Results 97.33% of the 300 patients had successfully completed ERCP, and complications such as post-ERCP pancreatitis (PEP) and infection of biliary tract occurred in 37 patients. Logistic regression showed that the risk factors for PEP were obesity (BMI > 28 kg/m2), sphincter of Oddi dysfunction, multiple cannulation, lengthy cannulation time ( > 60 min) and pancreatic duct imaging. The risk factors for infection of biliary tract were history of bile duct calculus, history of bile duct therapy, and high biliary tract obstruction.Conclusion ERCP in elderly patients with choledocholithiasis proved effective. Identification and evaluation of the risk factors should be taken to avoid complications resulted from ERCP.