Predictors |
Very strong Ascending cholangitis Common bile duct stone on abdominal ultrasonography Bilirubin > 4 mg/dL |
Strong Dilated common bile duct on abdominal ultrasonography Bilirubin 1.8–4 mg/dL |
Moderate Age > 55 Abnormal aminotransferase and gamma-glutamyl transferase levels Gallstone pancreatitis |
Likelihood of choledocholithiasis based on predictors |
High (> 50%) Presence of any very strong factor Presence of 2 strong factors |
Intermediate (10% to 50%) All other patients |
Low (< 10%) No predictors present |
Adapted from reference 31.