A 52-year-old woman with a history of cholelithiasis presents with acute onset epigastric pain and vomiting for 8 hours. On examination, she is afebrile, heart rate 95/min, blood pressure 118/74 mmHg, with mild epigastric tenderness. Serum amylase is 950 U/L and serum lipase is 1800 U/L. Abdominal ultrasound shows multiple gallstones, a dilated common bile duct (8 mm), and mild pancreatic edema. What is the most appropriate next step in management?

Explanation

## Diagnosis: Acute Biliary Pancreatitis ### Clinical Features Confirming Biliary Etiology - **Cholelithiasis with dilated CBD** — suggests stone passage into the bile duct - **Elevated pancreatic enzymes** — confirms pancreatitis - **Absence of fever and hemodynamic stability** — indicates mild-to-moderate disease without complications ### Appropriate Management Strategy **High-Yield:** The management of acute biliary pancreatitis depends on severity and presence of cholangitis. ### Risk Stratification | Feature | Mild Pancreatitis | Severe Pancreatitis | |---------|------------------|--------------------| | Organ failure | Absent | Present | | APACHE II score | <8 | ≥8 | | Fever, hypotension | No | Yes | | Hypocalcemia | No | Yes | | Management | Conservative + early cholecystectomy | ICU, ERCP if cholangitis | **Key Point:** This patient has **mild acute biliary pancreatitis** (stable vitals, no fever, no organ dysfunction signs). ### Management Algorithm ```mermaid flowchart TD A[Acute Biliary Pancreatitis]:::outcome --> B{Severity?}:::decision B -->|Mild| C[Supportive care: NPO, IV fluids, analgesia]:::action C --> D[Early cholecystectomy within 48-72 hours]:::action B -->|Severe + Cholangitis signs| E[ERCP with sphincterotomy]:::urgent E --> F[Delayed cholecystectomy after recovery]:::action B -->|Severe, no cholangitis| G[Conservative management, ICU monitoring]:::action G --> H[Cholecystectomy after stabilization]:::action ``` ### Why Early Cholecystectomy? 1. **Prevents recurrent pancreatitis** — risk of recurrence is 4–62% if surgery is delayed 2. **Reduces hospital stay** — definitive treatment during index admission 3. **Guideline-recommended** — most international guidelines (AGA, ESGE) recommend cholecystectomy within 48–72 hours for mild pancreatitis [cite:Harrison 21e Ch 329] ### Clinical Pearl **Warning:** ERCP is NOT routinely indicated in uncomplicated acute biliary pancreatitis without evidence of cholangitis (fever, jaundice, elevated bilirubin). Unnecessary ERCP increases risk of post-ERCP pancreatitis. **Mnemonic for ERCP Indications in Pancreatitis:** **CHOP** — Cholangitis, Hyperbilirubinemia (>4 mg/dL), Obstruction on imaging, Persistent CBD dilation ### Supportive Care (All Cases) - NPO status until pain resolves - IV fluid resuscitation (goal: urine output 0.5–1 mL/kg/hr) - Analgesia (meperidine preferred over morphine to avoid sphincter spasm) - Electrolyte monitoring (especially calcium, magnesium) - Monitoring for complications (ARDS, acute kidney injury, disseminated intravascular coagulation)