Cholangitis Tokyo guideline

Diagnosing Cholangitis: The Tokyo Guidelines

Category	Criteria	Details
Suspected Acute Cholangitis
Systemic Inflammation	Fever and/or shaking chills	Laboratory evidence of an inflammatory response (elevated WBC count, CRP, etc.)
Cholestasis	Jaundice	Abnormal liver function tests (elevated ALP, GGT, AST, ALT)
Imaging	Biliary dilatation	Evidence of the etiology (e.g., stricture, stone, stent, etc.)
Definite Acute Cholangitis	Diagnosis confirmed if one item from each category is present

Grade	Criteria	Details
Grade I (Mild)	- Does not meet criteria for Grade II or III	Antibiotics: - Ceftriaxone 2 grams IV once daily - + Metronidazole 500 mg IV every 8 hours - Switch to oral antibiotics upon clinical improvement for 7-10 days Supportive Care: - Hydration - Pain management - Antiemetics as needed Monitoring: - Regular monitoring of vital signs and liver function tests Follow-Up: - Outpatient follow-up to ensure resolution
Grade II (Moderate)	Any two of the following: - Abnormal white blood cell count (>12,000 or <4,000/mm³) - High fever (≥39°C) - Age (≥75 years) - Hyperbilirubinemia (Total bilirubin ≥5 mg/dL) - Hypoalbuminemia (<STD×0.7)	Antibiotics: - Ceftriaxone 2 grams IV once daily - Metronidazole 500 mg IV every 8 hours - Continue IV antibiotics for minimum 7 days Endoscopic Intervention (ERCP): - Perform within 24-48 hours, therapeutic maneuvers as indicated Supportive Care: - Aggressive fluid resuscitation - Monitoring for sepsis or organ dysfunction Monitoring: - Close monitoring in a step-down or high-dependency unit Follow-Up: - Regular outpatient follow-up with imaging to ensure resolution
Grade III (Severe)	Presence of organ/system dysfunction: - Cardiovascular: Hypotension requiring dopamine ≥5 μg/kg per minute, or any dose of norepinephrine - Neurological: Disturbance of consciousness - Respiratory: PaO2/FiO2 ratio <300 - Renal: Oliguria, serum creatinine >2.0 mg/dL - Hepatic: PT-INR >1.5 - Hematological: Platelet count <100,000/mm³	Antibiotics: - Broad-spectrum IV antibiotics, consider vancomycin or meropenem ICU Admission: - For organ/system dysfunction requiring close monitoring and supportive care Endoscopic Intervention (ERCP): - Urgent ERCP, consider PTC if ERCP is not feasible Surgical Intervention: - For cases where ERCP/PTC is not possible or unsuccessful Supportive Care: - Hemodynamic support with vasopressors - Mechanical ventilation for respiratory failure - Renal replacement therapy for acute kidney injury Monitoring: - Continuous ICU monitoring, regular assessment of organ function, and response to treatment Follow-Up: - Detailed follow-up with specialists post-recovery

Figure 1: Initial Response to Suspected Acute Biliary Infection

Start with the Basics:
- Measure vital signs to gauge urgency.
- Gather patient history (consultation).
- Perform a physical exam.
Diagnostic Criteria: Use the TG18/TG13 criteria to determine if the patient has:
- Acute Cholangitis: Infection of the bile duct.
- Acute Cholecystitis: Inflammation of the gallbladder.
- Other Diseases: If the criteria are not met, consider other diagnoses.
Initial Management: Provide initial medical treatment and organ support if needed (e.g., fluids, antibiotics, oxygen, airway management).
Severity Grading & General Status:
- Grade the severity of acute cholangitis/cholecystitis using TG18/TG13 criteria.
- Evaluate the patient's overall condition (e.g., using the Charlson Comorbidity Index and ASA Physical Status Classification).
Treatment Decisions:
- Follow the appropriate TG18 flowchart (Figure 2 for acute cholangitis).
- If the facility lacks resources for necessary care, transfer the patient to an advanced center.

Figure 2: Management of Acute Cholangitis

All Grades: Start with antibiotics and general supportive care.
Grade I (Mild):
- Continue antibiotics and supportive care.
- Consider biliary drainage if the patient doesn't improve with initial treatment.
- After completing the course of antibiotics, address the underlying cause (etiology) if necessary.
Grade II (Moderate):
- Continue antibiotics and supportive care.
- Perform early biliary drainage.
- If possible, treat the underlying cause (e.g., remove bile duct stones) at the same time as drainage.
Grade III (Severe):
- Perform urgent biliary drainage along with organ support (e.g., vasopressors, mechanical ventilation) and antibiotics.
- Treat the underlying cause once the patient stabilizes.

Key Reminders

Blood & Bile Cultures: Obtain before starting antibiotics (if possible) and during biliary drainage, respectively.
Underlying Cause: Don't forget to address the reason for the cholangitis (e.g., stones, strictures) after the acute infection subsides.
Transfer Criteria: Be familiar with the criteria for transferring patients to a higher level of care.

Introduction Cholangitis: A Comprehensive Guide for Resident Surgeons

Cholangitis, a bacterial infection of the bile ducts, is a serious condition requiring prompt diagnosis and treatment. As a surgical resident, you will encounter this disease and need to understand its nuances to provide optimal care. This guide provides a detailed breakdown of cholangitis, tailored for the surgical resident.

I. Understanding the Basics

1. What is Cholangitis?

Biliary Obstruction + Infection: Cholangitis arises from a combination of biliary obstruction and ascending bacterial infection.
Increased Pressure: The obstruction leads to bile stasis and increased pressure within the bile ducts, creating an environment conducive to bacterial growth and the spread of infection.
Systemic Effects: The infection can spill over into the bloodstream, causing a systemic inflammatory response syndrome (SIRS), potentially leading to sepsis and organ dysfunction.

2. What Causes Cholangitis?

Choledocholithiasis: The most frequent cause (about 80% of cases), involving gallstones lodged in the common bile duct.
Benign Biliary Strictures: Narrowing of the bile ducts due to prior surgery, inflammation (e.g., primary sclerosing cholangitis), or trauma.
Malignancy: Tumors of the bile duct, pancreas, or nearby structures obstructing bile flow.
Instrumentation: Post-ERCP complications, bile duct stents, or other instrumentation can trigger cholangitis.
Parasitic Infections: Rarely, parasites like Ascaris lumbricoides can cause bile duct obstruction and cholangitis.

II. Diagnosis: Clinical Acuity is Key

A. Clinical Presentation:
- Charcot's Triad: The classic presentation, but remember its limited sensitivity (~20-30%).
  - Fever & Chills: Due to systemic inflammation.
  - RUQ Pain: Often severe, colicky, may radiate to the right shoulder.
  - Jaundice: Yellowing of skin and eyes from bilirubin buildup.
- Reynolds' Pentad: Indicates more severe cholangitis.
  - Charcot's Triad: (fever, RUQ pain, jaundice).
  - Hypotension: Suggests sepsis and circulatory compromise.
  - Altered Mental Status: Indicates severe infection and potential organ dysfunction.
B. Laboratory Findings:
- Elevated WBC Count: With left shift (increased neutrophils) indicating infection.
- Elevated CRP: Non-specific marker of inflammation.
- Elevated Liver Function Tests (LFTs):
  - Cholestatic Pattern: Increased ALP, GGT, and bilirubin.
  - Hepatocellular Injury: Elevated AST, and ALT may be seen, especially with severe inflammation.
C. Imaging Studies:
- 1. Ultrasound (US):
  - First-line Imaging: Widely available, non-invasive.
  - Key Findings:
    - Biliary Dilatation: Dilated intrahepatic and/or extrahepatic bile ducts.
    - Choledocholithiasis: Echogenic stones with posterior acoustic shadowing in the common bile duct.
- 2. Computed Tomography (CT):
  - Useful to Identify Complications: Perforation, abscess, pancreatitis, portal vein thrombosis.
  - Key Findings:
    - Biliary Dilatation: Similar to US, but often better delineation of anatomy.
    - Obstructing Lesions: Visualizes stones, strictures, or masses causing obstruction.
    - Transient Hepatic Attenuation Differences (THAD): Segmental areas of increased enhancement in the early phase of contrast injection, suggesting increased blood flow related to inflammation.
- 3. Magnetic Resonance Cholangiopancreatography (MRCP):
  - Excellent Biliary Anatomy Visualization: Non-invasive, no contrast required.
  - Key Findings:
    - Biliary Dilatation: Clearly shows the level of obstruction.
    - Choledocholithiasis: Stones appear as signal voids within the bile duct.
    - Strictures & Masses: Identifies areas of narrowing or obstruction caused by benign or malignant lesions.

III. Severity Grading: The Tokyo Guidelines 2018

Crucial for Treatment Decisions: Guides urgency of biliary drainage and intensity of supportive care.
Grade I (Mild):
- No organ dysfunction.
- Responds well to conservative treatment (antibiotics, fluids).
Grade II (Moderate):
- Requires early biliary drainage.
- Meets TWO or more of the following:
  - WBC > 12,000/mm³ or < 4,000/mm³
  - Fever ≥ 39°C
  - Age ≥ 75 years
  - Total bilirubin ≥ 5 mg/dL
  - Albumin < lower limit of normal * 0.7
Grade III (Severe):
- Requires urgent biliary drainage and intensive care.
- Exhibits organ dysfunction in ANY of these systems:
  - Cardiovascular: Hypotension requiring vasopressors.
  - Neurological: Altered mental status.
  - Respiratory: PaO2/FiO2 ratio < 300.
  - Renal: Oliguria or creatinine > 2.0 mg/dL.
  - Hepatic: INR > 1.5.
  - Hematological: Platelet count < 100,000/mm³.

IV. Management: A Step-by-Step Approach

A. Initial Management (for ALL Grades):

Stabilize the Patient:
- Airway, Breathing, Circulation: Address any immediate life-threatening issues.
- IV Access & Fluid Resuscitation: 2 large-bore IVs, aggressive fluid boluses with isotonic crystalloids (e.g., normal saline, lactated Ringer's).
- Oxygen Therapy: As needed, titrated to maintain oxygen saturation > 92%.
- Monitoring: Continuous vital signs, pulse oximetry, urine output, mental status assessment.
Empiric Antibiotics:
- Broad-Spectrum Coverage: Target common biliary pathogens.
  - First-Line: Ceftriaxone 2g IV once daily + Metronidazole 500mg IV every 8 hours
  - Alternative: Piperacillin/Tazobactam 3.375g IV every 6 hours.
- Consider Local Antibiogram: Adjust based on local resistance patterns.
- Severe Cases: May require broader coverage with carbapenems (e.g., Imipenem/Cilastatin, Meropenem, Doripenem, Ertapenem) or combination therapy.
Pain Management:
- Opioid Analgesics: Morphine or hydromorphone IV, titrated to achieve adequate pain control. Caution: Opioids can cause sphincter of Oddi spasm, potentially worsening obstruction.
- Consider NSAIDs: If pain is mild and there are no contraindications.
NPO (Nil Per Os): Avoid oral intake to rest the GI tract and prepare for potential procedures.
Cultures: Obtain blood and bile cultures before starting antibiotics whenever possible.

B. Definitive Management: Drainage is Paramount

1. Endoscopic Retrograde Cholangiopancreatography (ERCP):

Gold Standard for Drainage: Allows visualization and intervention within the bile ducts.
Procedure:
- Endoscope is inserted via the mouth into the duodenum.
- Cannulation of the common bile duct.
- Cholangiography: Injection of contrast to visualize the biliary anatomy and obstruction.
- Biliary Drainage:
  - Nasobiliary Drainage (ENBD): Catheter is placed through the bile duct into the duodenum, with the other end exiting through the nose. Allows for external drainage and bile sampling.
  - Biliary Stenting (EBS): Stent placed across the obstruction to maintain bile flow into the duodenum.
- Stone Removal: If choledocholithiasis is the cause, stones can be extracted via basket or balloon catheters, sometimes requiring lithotripsy.
Timing:
- Grade II: Early ERCP (within 24-48 hours).
- Grade III: Urgent ERCP (as soon as possible after stabilization).
Advantages: Less invasive than surgery, direct access to the biliary tree, allows for single-stage treatment (drainage and stone removal).
Disadvantages: Requires specialized expertise, risk of post-ERCP pancreatitis, bleeding, or perforation.

2. Percutaneous Transhepatic Cholangiography (PTC):

Alternative Drainage Method: When ERCP is not feasible (e.g., altered anatomy, failed ERCP) or contraindicated.
Procedure:
- Needle puncture of the intrahepatic bile duct under US or fluoroscopic guidance.
- Cholangiography: Contrast injection to visualize the biliary tree.
- Drainage: Catheter placement for external or internal bile drainage.
Advantages: Can be performed when ERCP is unsuccessful or not possible.
Disadvantages: More invasive than ERCP, risk of bleeding, bile leak, or pneumothorax.

3. Surgical Drainage:

Rarely Performed: Reserved for cases where ERCP and PTC are not feasible or have failed, or when complications (e.g., perforation, abscess) require surgical intervention.
Procedure:
- Open or laparoscopic approach.
- Choledochotomy: Opening of the common bile duct for exploration, stone removal, or drainage.
Advantages: Definitive treatment, can address complex situations.
Disadvantages: Highest risk of complications, longer recovery time.

C. Post-Drainage Management

Antibiotic Adjustment: Tailor antibiotics based on culture results. De-escalate to narrower-spectrum antibiotics when appropriate.
Monitor for Resolution: Clinical improvement (fever, pain, jaundice), normalized WBC and CRP, repeat imaging to ensure drainage effectiveness.
Address Underlying Cause:
- Choledocholithiasis: Cholecystectomy after cholangitis resolves to prevent recurrence.
- Strictures: May require balloon dilation or stenting, possibly surgery.
- Malignancy: Oncology consult for management of the underlying tumor.

V. Special Considerations for Resident Surgeons

Know the Tokyo Guidelines: The TG18 offers a standardized framework for diagnosis and management, aiding in clinical decision-making.
Learn ERCP Basics: Understanding ERCP and its complications will help you participate effectively in patient management.
Recognize Difficult Cases: Acute cholangitis can be challenging. Consult senior colleagues promptly for complex situations.
Communicate Clearly: Keep the attending surgeon informed of the patient's progress and any concerns.

Conclusion

Cholangitis, a bacterial infection of the bile ducts, requires prompt and effective management, especially for surgical residents. Understanding its pathophysiology, diagnostic criteria, and appropriate treatment protocols is crucial.

Key Points Recap:

Pathophysiology & Etiology:
- Biliary Obstruction + Infection: Typically caused by choledocholithiasis, benign biliary strictures, malignancy, instrumentation, or parasitic infections.
- Systemic Effects: Can lead to sepsis and organ dysfunction.
Diagnosis:
- Clinical Presentation: Charcot's Triad (fever, RUQ pain, jaundice) and Reynolds' Pentad (adding hypotension and altered mental status).
- Laboratory Findings: Elevated WBC, CRP, and liver function tests (ALP, GGT, bilirubin, AST, ALT).
- Imaging Studies: Ultrasound (first-line), CT, and MRCP to visualize biliary obstruction and complications.
Severity Grading (Tokyo Guidelines 2018):
- Grade I (Mild): No organ dysfunction; responds to conservative treatment.
- Grade II (Moderate): Requires early biliary drainage; meets specific criteria (e.g., elevated WBC, fever ≥ 39°C).
- Grade III (Severe): Requires urgent biliary drainage and intensive care due to organ dysfunction.
Management:
- Initial Management (All Grades): Stabilize patient, IV fluids, empiric antibiotics, pain management, NPO, and obtain cultures.
- Definitive Management:
  - ERCP: Gold standard for drainage, allows for visualization and intervention.
  - PTC: Alternative when ERCP is not feasible.
  - Surgical Drainage: Reserved for complex cases where other methods fail.
- Post-Drainage Management: Adjust antibiotics, monitor for resolution, address underlying causes (e.g., cholecystectomy for choledocholithiasis).
Special Considerations for Resident Surgeons:
- Understand the Tokyo Guidelines.
- Learn the basics of ERCP.
- Recognize and escalate difficult cases.
- Maintain clear communication with senior colleagues and attending surgeons.