Acute Cholecystitis and Biliary Obstruction Management

Indications for ERCP

• Patients with acute cholecystitis and mildly elevated bilirubin but normal liver function tests do not require ERCP unless there is evidence of common bile duct obstruction or cholangitis, as recommended by the World Society of Emergency Surgery 1, 2, 3
• Acute cholangitis with biliary obstruction, confirmed common bile duct stones on imaging, acute gallstone pancreatitis with cholangitis, common bile duct obstruction with jaundice, acute gallstone pancreatitis with persistent biliary obstruction, and dilated common bile duct (>6mm) with elevated bilirubin are indications for ERCP 1, 2, 3

Risk Stratification and Imaging

• The World Society of Emergency Surgery guidelines provide a clear risk stratification approach for patients with suspected common bile duct stones 3
• For patients with moderate risk of CBD stones, less invasive imaging such as Magnetic resonance cholangiopancreatography (MRCP), Endoscopic ultrasound (EUS), Intraoperative cholangiography (IOC), or Laparoscopic ultrasound (LUS) should be performed first 3
• A dilated common bile duct (CBD) on ultrasound is an indication for further investigation, as it is highly suggestive of obstruction, and liver function tests (LFTs) should be checked to assess for a cholestasis pattern, with elevated alkaline phosphatase, GGT, and bilirubin further supporting biliary obstruction 4

Complications of ERCP

• ERCP is associated with significant complications, including pancreatitis (3-5%), bleeding (2% when combined with sphincterotomy), cholangitis (1%), duodenal perforation (rare), and procedure-related mortality (0.4%) 2, 5

Best Practices

• Performing ERCP without clear indications exposes patients to unnecessary risks, according to the World Society of Emergency Surgery 2, 5
• Patients with fever, jaundice, and right upper quadrant pain should be considered for urgent ERCP, as recommended by the World Society of Emergency Surgery 2
• A comprehensive assessment including clinical presentation, ultrasound findings, and liver function tests should guide decision-making, rather than relying solely on bilirubin levels 3
• Early biliary decompression is essential for survival when cholangitis is present, as recommended by the World Society of Emergency Surgery 2
• A stepwise approach is recommended for difficult biliary stones, starting with endoscopic sphincterotomy plus large balloon dilation, followed by mechanical lithotripsy, cholangioscopy-guided lithotripsy, and reserving percutaneous or surgical approaches for cases where endoscopic techniques fail, as recommended by the European Society of Gastrointestinal Endoscopy 4
• Cholangioscopy-guided lithotripsy can increase duct clearance rates to nearly 100%, and is particularly effective for very large or impacted stones, according to the American Society for Gastrointestinal Endoscopy 4
• Endoscopic Papillary Balloon Dilation (EPBD) combined with sphincterotomy is recommended for large stones, and Cholangioscopy-guided lithotripsy using Electrohydraulic lithotripsy (EHL) or Laser lithotripsy (LL) for very large or impacted stones, as recommended by the European Society of Gastrointestinal Endoscopy 4
• Biliary sphincterotomy and endoscopic stone extraction is the primary recommended treatment for patients with retained common bile duct stones, especially post-cholecystectomy, with a success rate of 80-95% and a complication rate of 4-5.2%, including pancreatitis, cholangitis, hemorrhage, and perforation, and a mortality risk of approximately 0.4% 6, 4

Procedure Outcomes

Follow-up and Prevention

• Patients with a history of recurrent bile duct stones require regular follow-up, and annual ERCP for stone removal may reduce the rate of recurrent acute cholangitis, and early cholecystectomy should be performed in all patients with bile duct stones after acute pancreatitis due to gallstones to prevent recurrence 4
• Treatment of underlying hemolytic disorders is crucial to prevent stone recurrence, and for patients with multiple episodes of recurrent bile duct stones, consideration should be given to choledochojejunostomy (CJS) instead of choledochoduodenostomy (CDS) due to a significantly lower stone recurrence rate (14.3% vs 66.7%) 4
• Administering prophylactic antibiotics prior to ERCP and considering rectal NSAIDs to reduce post-ERCP pancreatitis risk are part of the management strategy, as recommended by the British Society of Gastroenterology guidelines, and after successful ERCP and stone clearance, patients should be monitored with LFTs to ensure normalization, and follow-up imaging may be warranted if symptoms recur 4, 7
• Urgent biliary decompression via ERCP is recommended in cases of acute cholangitis with septic shock, and for gallstone pancreatitis with cholangitis or persistent biliary obstruction, biliary sphincterotomy and stone extraction within 72 hours is recommended, as recommended by the European Society of Gastrointestinal Endoscopy 4