Role of endoscopic retrograde cholangiopancreatography for suspected choledocholithiasis in patients undergoing laparoscopic cholecystectomy,☆☆,

Presented, in part, at the Annual Meeting of the American Society for Gastrointestinal Endoscopy, May 19-22, 1996, San Francisco, California (Gastrointest Endosc 1996;43:399).
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Abstract

Background: We report our experience of selective cholangiography in a series of laparoscopic cholecystectomies and evaluate the strategy of using “stricter criteria” to select preoperative endoscopic retrograde cholangiopancreatography (ERCPs). Methods: A total of 1847 consecutive laparoscopic cholecystectomies were analyzed for use of cholangiography. A high risk of common bile duct stones (bilirubin level more than 2 mg/dL, jaundice, alkaline phosphatase level more than 150 U/L, pancreatitis, or dilated bile duct and/or stone on ultrasound or CT) was an indication for preoperative ERCP. Selective intraoperative cholangiography was performed for intermediate risk of bile duct stones. The strategy of using “stricter criteria” (jaundice and/or demonstrated bile duct stones on ultrasound or CT) for selecting preoperative ERCP was evaluated retrospectively. Results: Preoperative ERCP was performed in 135 patients (7.3%) and demonstrated bile duct stones in 43 (32%). Of 36 patients with mild gallstone pancreatitis alone, stones were found only in 6 patients (17%). Selective intraoperative cholangiography was performed in 87 (5%), and stones were found in 2 (2%); 67 (3.6%) postoperative ERCPs were performed for suspected choledocholithiasis, and stones were found in 21 (32%). Applying “stricter criteria” to select preoperative ERCP would predict ductal stones in 56%, whereas 3% of patients with stones would be missed, resulting in a 50% reduction in preoperative ERCPs. Conclusions: Even in selected patients considered likely to have choledocholithiasis, the diagnostic yield of preoperative ERCP is low. Using “stricter criteria” to select patients for preoperative ERCP can avoid unnecessary ERCPs. (Gastrointest Endosc 1998;47:50-6.)

Section snippets

Methods

A total of 1847 consecutive laparoscopic cholecystectomies performed in this institution from 1990 through 1995 were analyzed for use of ERCP and IOC. A high risk of common duct stones was considered an indication for preoperative ERCP and was defined as a bilirubin level of more than 2 mg/dL (normal range 0.2 to 1.2 mg/dL), an alkaline phosphatase (ALK) level of more than 150 U/L (normal range 36 to 118 U/L), jaundice or pancreatitis (either present or recent), or dilated bile duct (diameter

Results

The proportion of common bile duct stones (i.e., number of patients with stones detected at preoperative or postoperative ERCP or IOC) was 4% (70 of 1847 cholecystectomies). ERCP was performed in 208 of 1847 cases (11%).

Discussion

Although there are other reports of ERCP in patients undergoing laparoscopic cholecystectomy,2, 3, 4, 5, 6, 7, 8 ours has the largest number of patients from a single center. Even in patients considered likely to have bile duct stones, we found that the positive diagnostic yield of preoperative ERCP was low (32%). This is supported by the results of other studies in which the diagnostic yield ranged from 25% to 50%.2, 3, 4, 5, 6, 7, 8 The 7% of our laparoscopic cholecystectomy patients who

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    From the Division of Gastroenterology and Gastrointestinal Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.

    ☆☆

    Reprint requests: Tony C. K. Tham, MD, MRCP, Consultant Gastroenterologist, Ulster Hospital, Dundonald, Belfast, BT16 0RH, Northern Ireland, United Kingdom.

    37/1/86211

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