Acute respiratory distress syndrome is a sudden, widespread lung injury in which fluid leaks into the air sacs and oxygen levels fall. Severe acute pancreatitis releases inflammatory substances into the blood that can damage the lungs, usually within the first days of illness.
Key symptoms
- Worsening shortness of breath and fast breathing
- Low oxygen despite extra oxygen
- Ongoing upper abdominal pain from pancreatitis
- Confusion, restlessness or exhaustion
What you find on exam
- Tachypnea, use of accessory muscles and low oxygen saturation
- Diffuse crackles on both sides
- Fever, tachycardia, low blood pressure or signs of shock
- Tender, distended abdomen; check for compartment syndrome in severe cases
Tests
- Arterial blood gas: PaO2/FiO2 ratio 300 or less
- Chest X-ray: bilateral infiltrates not explained by heart failure
- Echocardiogram or BNP to rule out cardiac edema
- Lipase, calcium, triglycerides, lactate and kidney function
Treatment basics
- ICU care with oxygen; high-flow nasal oxygen or early intubation as needed
- Lung-protective ventilation: tidal volume 6 mL/kg ideal body weight, plateau pressure 30 cm H2O or less
- Prone positioning for severe ARDS
- Careful fluids after initial resuscitation; avoid fluid overload
- Treat the pancreatitis: pain control, early enteral feeding, look for infection
Red flags
- Oxygen saturation falling despite high oxygen
- Shock or rising lactate
- Rising airway pressures or a sudden drop that suggests a pneumothorax
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Sources: NCCPA PANCE Content Blueprint; NBOME COMLEX-USA clinical presentations; NCSBN 2026 NCLEX-RN Test Plan. Written by Making Synapses. Making Synapses is not affiliated with these organizations.