A 36-year-old male is admitted with severe acute pancreatitis. On day 2, his vital signs are: BP 86/54 mmHg, HR 126 bpm, RR 28/min, temperature 38.6°C. Arterial blood gas on room air shows PaO2 55 mmHg. Serum calcium is 6.8 mg/dL and BUN is 44 mg/dL. What does this clinical presentation represent according to the Revised Atlanta Classification?

Answer and explanation

Correct answer: D. Severe acute pancreatitis with persistent organ failure

  1. Step 1: The patient demonstrates cardiovascular failure (shock, BP < 90), respiratory failure (PaO2 < 60), and severe hypocalcemia and azotemia.
  2. Step 2: Under the Revised Atlanta Classification, organ failure (shock, pulmonary failure, renal failure) that persists beyond 48 hours defines severe acute pancreatitis.
  3. Step 3: Persistent organ failure carries significant mortality (30-50%) requiring dedicated intensive care management.
Answer
Severe acute pancreatitis with persistent organ failure.
Why not the others: Mild pancreatitis has no organ failure or local complications; moderately severe features transient organ failure (<48h) or local complications.

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