MediumRespiratoryLong-term oxygen therapy indication in COPDca-mccqe1ca-rcpsc-im
A 68-year-old man with COPD and chronic hypoxaemia (PaO₂ 7.0 kPa on room air at rest) presents for follow-up. According to Canadian COPD guidelines, what is the indication for long-term oxygen therapy in this patient?