Table 2 Risk factors and classification of risk for CBDS (modified from Maple et al. 2010)
Very strong | Evidence of CBDS stone at the abdominal ultrasound |
Ascending cholangitis | |
Strong | Common bile duct diameter > 6 mm (with gallbladder in situ) |
Total serum bilirubin level > 1.8 mg/dl | |
Moderate | Abnormal liver biochemical test other than bilirubin |
Age older than 55 years | |
Clinical gallstone pancreatitis | |
Risk class for choledocolithiasis | |
High | Presence of any very strong |
Low | No predictors present |
Intermediate | All other patients |