🏥 USMLE Exam Prep

A 60-year-old male with severe ARDS is intubated and mechanically ventilated. Despite increasing positive end-expiratory pressure (PEEP) to 15 cmH2O and optimizing tidal volumes, his oxygen saturation remains 88% on 100% FiO2. His plateau pressure is 32 cmH2O. He is already proned. What is the most appropriate next step to improve oxygenation?

A Increase tidal volume to 8 mL/kg ideal body weight.
B Decrease PEEP to 10 cmH2O.
C Consider neuromuscular blockade.
D Administer inhaled nitric oxide.

✓ Correct Answer: Option C

For severe ARDS refractory to conventional ventilation strategies (optimized PEEP, low tidal volume, proning), neuromuscular blockade can improve oxygenation by reducing oxygen consumption, improving ventilator synchrony, and minimizing patient-ventilator asynchrony and lung injury.

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