Diagnosis and Management of Cholangitis

Diagnostic Criteria

The triad of Charcot (fever/chills, right upper quadrant/epigastric pain, and jaundice) is characteristic of acute cholangitis 1, 2
Cholestatic pattern with elevated alkaline phosphatase (ALP) and gamma-glutamil transpeptidase (GGT) is the most common biochemical abnormality 1, 2
Leukocytosis and elevated C-reactive protein are major diagnostic criteria 1
Abdominal ultrasound is the recommended initial imaging modality to detect biliary dilatation 1, 3
Magnetic resonance cholangiopancreatography (MRCP) is preferred if both ultrasound and CT are inconclusive 3, 4
Endoscopic ultrasound (EUS) has high sensitivity for detecting common bile duct stones 1, 4

Acute cholangitis can be classified into three grades based on severity, with mild (Grade I) responding to initial medical treatment 3
Moderate (Grade II) cases do not respond to initial medical treatment and have no organ dysfunction 2
Severe (Grade III) cases are accompanied by at least one new-onset organ dysfunction

Empiric antibiotic therapy should be initiated promptly, within 1 hour for patients with septic shock and within 4 hours for other cases 1, 3
The timing of biliary decompression depends on severity, with urgent decompression for severe cases (Grade III) 1
Endoscopic drainage via ERCP is the procedure of choice 1, 3
Address the underlying cause of obstruction, including cholecystectomy for gallstone disease, stent placement for strictures 2, and oncologic consultation for malignant obstruction 2

With successful biliary drainage, 3 days of antibiotics may be sufficient 1
Extended antibiotic course is necessary if biliary obstruction persists 1
For patients with primary sclerosing cholangitis (PSC) and suspected cholangiocarcinoma, evaluation should include serum CA 19-9, MR imaging, and endoscopic cholangiography with brushings for cytology and FISH analysis 2, 5
CA 19-9 levels >129 U/mL combined with malignant-appearing strictures suggest cholangiocarcinoma 5
Delay in biliary decompression beyond 24 hours in moderate to severe cases increases mortality 3
Bacterial cholangitis should be absent when interpreting serum CA 19-9 levels for suspected malignancy 5
Distinguishing between primary and secondary cholangitis is important, considering clinical history and cholangiographic findings 2

MRCP is an effective imaging test for common bile duct stones with sensitivity of approximately 85% and specificity of 93%, making it valuable for confirming biliary obstruction 6, 7
The American College of Physicians and other medical societies likely recommend that the diagnosis of acute cholangitis should include clinical signs, laboratory findings, and imaging findings, such as those from the Infectious Diseases Society of America, although the exact recommendation is from Clinical Infectious Diseases 8

For non-critically ill, immunocompetent patients with adequate source control, the World Journal of Emergency Surgery recommends Amoxicillin/Clavulanate 2g/0.2g every 8 hours 9
For critically ill or immunocompromised patients, the Infectious Diseases Society of America likely recommends Piperacillin/tazobactam 4g/0.5g every 6 hours or 16g/2g by continuous infusion, as suggested by Clinical Infectious Diseases 10, 9
In patients with documented beta-lactam allergy, the World Journal of Emergency Surgery recommends Eravacycline 1 mg/kg every 12 hours or Tigecycline 100 mg loading dose then 50 mg every 12 hours 9

Percutaneous transhepatic cholangiography (PTC) drainage is an alternative when ERCP is not feasible, as noted in BioScience Trends 6
Surgical biliary drainage should be avoided in severe cholangitis, according to BioScience Trends 6

For gallstone disease, cholecystectomy after resolution of acute inflammation is recommended, as suggested by the World Journal of Emergency Surgery 9