Cholangitis score: a scoring system to predict severe cholangitis in gallstone pancreatitis

Abstract. Background/Purposes: Emergency biliary decompression and stone extraction are mandatory for patients with gallstone pancreatitis who have ampullary stone impaction or persistent stones and pus in the bile duct (severe cholangitis). The aim of this study was to devise a simple scoring system for the prediction of complicating severe cholangitis in gallstone pancreatitis. Methods: Clinical signs, laboratory data, and ultrasonography (US) findings at the time of admission, and the bile duct pathology at the time of bile duct exploration, were reviewed in 66 patients with gallstone pancreatitis. Variables which discriminated 26 patients with bile duct stones from 40 without were defined as predictive factors of bile duct stones. The receiver operating characteristic (ROC) curve was used to determine the optimal cutoff values of numerical variables. One point was allocated to each predictive factor, and the total score was defined as the cholangitis score (CS). Bile duct pathology identified at the time of bile duct exploration was graded into three categories: mild, moderate, and severe cholangitis. A threshold value of the CS, claimed to be predictive of severe cholangitis, was determined by using the ROC curve. Results: The scoring system consisted of four predictive factors: (1) pyrexia (temperature ≧38 °C), (2) elevated serum bilirubin (≧2.2 mg/dl), (3) dilated bile duct (≧11 mm maximum diameter on US), and (4) bile duct stones detected on US. The scoring system predicted severe cholangitis with 92% sensitivity and 98% specificity in patients with scores of three or four points. Conclusions: Patients with gallstone pancreatitis who meet three or four of the above predictive factors at the time of admission are likely to have severe cholangitis, and should be rapidly treated by biliary decompression and stone extraction. Received: July 13, 2001 / Accepted: November 16, 2001