ICD-10
K85.9
Setting
ER / Ward / ICU
Urgency
High
Prevalence
Common cause of acute abdomen and surgical admission
1. Recognition
Sudden-onset severe epigastric pain radiating to the back, often after a fatty meal or alcohol binge, with nausea/vomiting. Exam: epigastric tenderness, guarding, reduced bowel sounds; Grey Turner's/Cullen's signs in severe/hemorrhagic disease (late, uncommon).
2. Diagnosis
Diagnosis requires 2 of 3: (1) characteristic abdominal pain, (2) serum lipase or amylase >3× upper limit of normal, (3) characteristic findings on CT/MRI/ultrasound. First-line: serum lipase (more specific than amylase), FBC, U&E, LFTs, calcium, glucose, triglycerides, abdominal ultrasound (for gallstones). Confirmatory imaging: contrast-enhanced CT abdomen — best performed 72 h after onset if severity assessment or complications suspected (earlier CT may underestimate necrosis).
Key Differentials
- Perforated peptic ulcer
- Acute cholecystitis / biliary colic
- Mesenteric ischemia
- Inferior wall myocardial infarction
3. Management
3a. Immediate Steps (first 0–24 h, all patients)
- 0–1 h: Establish 2 large-bore IV cannulas; send bloods (lipase, FBC, U&E, LFTs, calcium, glucose, triglycerides, CRP, ABG if unwell). ER
- 0–6 h: Aggressive isotonic IV fluid resuscitation — Ringer's lactate 5–10 mL/kg/h initially, titrated to urine output ≥0.5 mL/kg/h and hemodynamic response; reassess frequently to avoid fluid overload. ER/WARD
- 0–6 h: Analgesia — IV opioids (e.g., Morphine or Fentanyl, titrated to effect); do not withhold adequate analgesia.
- 0–6 h: Assess severity using a validated score (e.g., BISAP or Ranson's/APACHE II) to triage ward vs. HDU/ICU.
- Keep nil-by-mouth only if vomiting/ileus present; otherwise early oral feeding as tolerated (see 3d).
3b. Initial / First-Line Management (first days)
- Continue IV fluids with reassessment every 6–8 h; convert to maintenance rate once resuscitated.
- Antiemetics as needed: Ondansetron 4–8 mg IV.
- Antibiotics are not routinely indicated in sterile pancreatitis — reserve for confirmed infected necrosis or extrapancreatic infection (e.g., cholangitis).
- If gallstone pancreatitis with cholangitis or persistent biliary obstruction: urgent ERCP within 24–72 h.
- Correct hypocalcemia and hypertriglyceridemia if present (insulin infusion ± apheresis for triglycerides >1000 mg/dL, protocol-dependent).
3c. Definitive / Escalation Management
- Cholecystectomy for gallstone pancreatitis — during the same admission for mild disease (ideally within 1 week once clinically improving), or interval cholecystectomy after resolution in severe disease. SURGICAL
- Infected pancreatic necrosis: image-guided percutaneous or endoscopic drainage first-line ("step-up approach"); necrosectomy reserved for those failing minimally invasive drainage. ICU/SURGICAL
- ICU admission for organ failure (respiratory, renal, cardiovascular) persisting >48 h (defines severe pancreatitis per Revised Atlanta Classification). ICU
3d. Non-Pharmacological / Supportive Care
- Early enteral nutrition (oral or nasoenteric) within 24–72 h once tolerated — reduces infectious complications versus prolonged fasting or parenteral nutrition.
- Parenteral nutrition only if enteral route not tolerated after several days.
- Strict fluid balance monitoring; urinary catheter in moderate–severe disease.
- Alcohol cessation counseling and support if alcohol-related.
3e. Special Populations
- Pregnancy: gallstone pancreatitis is the most common cause; manage fluids and analgesia as above, involve obstetric team, avoid unnecessary radiation (prefer ultrasound/MRI over CT).
- Elderly: more cautious fluid resuscitation to avoid pulmonary edema; monitor closely.
- Renal impairment: adjust fluid strategy and monitor electrolytes closely; avoid nephrotoxic agents.
4. Monitoring & Follow-up
Track
- Vital signs, urine output hourly during resuscitation
- Serial CRP (peak at 48–72 h correlates with severity), hematocrit, U&E
- Daily clinical reassessment for organ dysfunction (respiratory rate/SpO₂, creatinine, BP)
- Repeat/contrast CT only if clinical deterioration or failure to improve — not routinely
Step-down/discharge criteria: pain controlled on oral analgesia, tolerating oral diet, no organ dysfunction, definitive plan for gallstone management in place.
5. Complications
- Pancreatic necrosis (sterile or infected) — infected necrosis needs drainage/antibiotics per step-up approach.
- Pseudocyst — observe if asymptomatic; drain (endoscopic/percutaneous) if symptomatic, infected, or enlarging beyond 6 weeks.
- Acute respiratory distress syndrome (ARDS) — supportive ventilation.
- Acute kidney injury — fluid optimization, renal replacement therapy if severe.
- Abdominal compartment syndrome — monitor intra-abdominal pressure in severe disease.
6. Red Flags / When to Escalate
- Persistent organ failure >48 h (severe pancreatitis, Atlanta classification)
- Hypotension unresponsive to initial fluid resuscitation
- Rising CRP with new fever suggesting infected necrosis
- Signs of abdominal compartment syndrome (tense distension, oliguria, rising ventilatory pressures)
- Grey Turner's or Cullen's sign — suggests retroperitoneal hemorrhage, involve surgical/ICU team urgently
7. Patient Counseling
- Avoid alcohol completely, even after recovery, to prevent recurrence.
- Follow a low-fat diet until gallstones are definitively managed (surgery if advised).
- Attend follow-up for gallbladder removal surgery if gallstones caused this episode.
- Seek urgent care if severe abdominal pain, fever, or vomiting recur.
8. References
Source guideline bodies (generic, non-fabricated):
- American College of Gastroenterology (ACG) Guideline for Acute Pancreatitis
- International Association of Pancreatology / American Pancreatic Association (IAP/APA) Guidelines
- Revised Atlanta Classification of Acute Pancreatitis
- NICE Guideline — Pancreatitis