A 68-year-old patient with severe COPD presents with acute worsening of dyspnea, increased cough, and purulent sputum. Oxygen saturation is 88% on room air. Arterial blood gas shows pH 7.28, pCO2 65 mmHg, pO2 55 mmHg. What is the most appropriate initial ventilation strategy?

The correct answer to the question "A 68-year-old patient with severe COPD presents with acute worsening of dyspnea, increased cough, and purulent sputum. Oxygen saturation is 88% on room air. Arterial blood gas shows pH 7.28, pCO2 65 mmHg, pO2 55 mmHg. What is the most appropriate initial ventilation strategy?" is Option B: Non-invasive positive pressure ventilation (NIPPV).

The other options — A) Intubation and mechanical ventilation, C) High-flow nasal cannula, D) Venturi mask with 40% oxygen — are incorrect for this USMLE Exam Prep question. As explained above: NIPPV is the preferred initial ventilation strategy for patients with acute exacerbations of COPD and hypercapnic respiratory failure, as it can reduce the need for intubation and improve outcomes. I…