Table 2

American Society for Gastrointestinal Endoscopy (ASGE) guidelines

LikelihoodPredictors
Very strongCommon bile duct stone on transabdominal ultrasound
Clinical ascending cholangitis
Bilirubin >4 mg/dL
StrongDilated common bile duct (>6 mm) on ultrasound
Bilirubin level 1.8–4 mg/dL
ModerateAbnormal liver biochemical test other than bilirubin
Age older than 55 years
Clinical gallstone pancreatitis
  • Presence of any strong or both strong predictors suggests a high likelihood of choledocholithiasis. No predictors suggest a low likelihood, and all other  patients   have an intermediate likelihood.18 By definition, all  patients   enrolled in this trial will have at least a moderate likelihood because of the clinical diagnosis of gallstone pancreatitis.