Effectiveness and Safety of Single-session Endoscopic Stone Extraction

Inclusion Criteria: * 1\. Age ≥18 years old and ≤90 years old * 2\. Patients met the Tokyo Guidelines 2018 (TG18) diagnosis of Grade I or Grade II acute cholangitis * 3\. Imaging examination confirmed the presence of choledocholithiasis Exclusion Criteria: * 1\. Common bile duct with benign or malignant stenosis * 2\. Changes in the anatomical structure of the stomach or duodenum * 3\. Patients with common biliary duct or pancreatic duct stent * 4\. Patients complicated with acute pancreatitis * 5\. Patients who underwent endoscopic intervention, percutaneous transhepatic cholangio drainage (PTCD) or other invasive interventions before admission * 6\. Patients with cardiac failure, respiratory failure or consciousness disorder can not tolerate endoscopic operation * 7\. Patients who have coagulation dysfunction or are taking anticoagulation and antiplate drugs * 8\. Imaging examination showed that the maximum diameter of choledocholithiasis was more than 1.5cm