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Common bile duct stones and acute cholangitis
A stone blocking the common bile duct turns the biliary tree into a closed, infected reservoir; in cholangitis antibiotics alone are not enough — the bile ducts must be drained, usually by ERCP.
Why it matters in the exam
Questions on this topic turn on two decisions. The first is diagnostic: a patient with gallstones and abnormal liver tests — is the probability of a duct stone high enough to go straight to ERCP, should MRCP or EUS come first, or can the patient go to surgery without further work-up? The answer depends on a risk grading built on the ultrasound finding, the bilirubin value, the duct diameter, age and the presence of cholangitis.
The second decision is therapeutic and urgent: a patient with fever, jaundice and right upper quadrant pain, sometimes with hypotension and confusion as well. Here you must grade severity by the Tokyo criteria, understand that biliary drainage is the life-saving treatment, and choose the timing by grade: immediately after resuscitation in organ failure, early in moderate disease, and only when there is no response to antibiotics in mild disease. Candidates are also asked what to do when ERCP fails, and why the gallbladder is removed during the same admission after the duct has been cleared.
Key points
- Cholangitis = infection plus obstruction of the bile ducts; treatment = antibiotics plus drainage.
- Grade III — urgent drainage; grade II — early drainage; grade I — drainage if no improvement within 24 hours.
- ERCP is the preferred drainage method; PTBD when it fails.
- High risk of a duct stone: stone on imaging, cholangitis, or bilirubin above 4 mg/dL with a dilated duct.
- After the duct is cleared — cholecystectomy during the same admission.
Summary table
| Risk level or situation | Findings | Next step |
|---|---|---|
| High risk of a duct stone | Duct stone on ultrasound, or cholangitis, or bilirubin above 4 mg/dL with a duct dilated above 6 mm | ERCP before cholecystectomy, or duct exploration during surgery |
| Intermediate risk | Abnormal liver tests, age above 55, or a dilated duct on ultrasound | EUS or MRCP before surgery, or intra-operative cholangiography |
| Low risk | None of the findings | Cholecystectomy without further work-up |
| Cholangitis grade I (mild) | No organ failure and no grade II criteria | Antibiotics; drainage if no response within 24 hours |
| Cholangitis grade II (moderate) | Two of: white cells above 12,000 or below 4,000, fever 39 or higher, age 75 or older, bilirubin 5 mg/dL or more, low albumin | Antibiotics and early biliary drainage |
| Cholangitis grade III (severe) | Organ failure: hypotension needing vasopressors, impaired consciousness, respiratory, renal or coagulation failure, or low platelets | Resuscitation, antibiotics and drainage as soon as possible |
Free exam questions
בן 40 עם ulcerative colitis מאובחן עם primary sclerosing cholangitis . מה תהיה ההשפעה של הטפול במחלת המעי על primary sclerosing cholangitis ? (the question as examined, in Hebrew)
- א. טיפול ביולוגי יעיל תמנע את המשך התקדמות המחלה בדרכי המרה
- ב. טיפול ביולוגי יעיל תגרום לנסיגה של המחלה בדרכי המרה
- ג. כריתת המעי החולה תמנע את המשך התקדמות המחלה בדרכי מרה
- ד. לטיפול במעי לא תהיה כ ל השפעה על התקדמות המחלה בדרכי המרה
What is the most recommended treatment for exocrine pancreatic insufficiency in chronic inflammation?
- A. Insulin
- B. Supplemental pancreatic enzymes with proton pump inhibitors
- C. ERCP and stent insertion
- D. Low fat diet and antibiotics
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Sources
- Tokyo Guidelines 2018 (TG18) for acute cholangitis, 2018 — Diagnostic criteria, severity grading and biliary drainage
- ASGE guideline on the role of endoscopy in the evaluation and management of choledocholithiasis, 2019 — Risk stratification for suspected choledocholithiasis
- Sabiston Textbook of Surgery, 21st edition (2022) — The Biliary System
Sources are given for further reading; the text is written afresh and not copied from them.
Reviewed by the Examqo AI Professor · 2026-11-02. The text may contain errors; when in doubt, check the source.