Respiratory Medicine MCQ for NEET PG & FMGE

A 72-year-old male has a history of chronic cough for 25 years, with progressively worsening dyspnea over the past 10 years. Arterial blood gas (ABG) analysis shows: PaCO₂ 6 kPa (45 mmHg), PaO₂ 6.4 kPa (48 mmHg). What is the most effective home treatment and nursing measure?

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