Respiratory Medicine MCQ for NEET PG & FMGE

← Respiratory Medicine

A 70-year-old male with a 30-year history of recurrent cough and sputum production, and 12 years of shortness of breath on exertion. Arterial blood gas (ABG) shows PaCO₂ 50 mmHg and PaO₂ 45 mmHg. The most effective home-based therapy to prolong life and prevent pulmonary hypertension progression is:

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