A 75-year-old with COPD on triple inhaler therapy asks about long-term oxygen therapy (LTOT). Resting PaO₂ is 52 mmHg on room air. What is indicated?...

Question

A 75-year-old with COPD on triple inhaler therapy asks about long-term oxygen therapy (LTOT). Resting PaO₂ is 52 mmHg on room air. What is indicated?

Accepted Answer

LTOT indicated for PaO₂ ≤55 mmHg or ≤60 with cor pulmonale/polycythemia

Answer

No LTOT unless PaO₂ ≤45 mmHg

Answer

LTOT only if desaturation during sleep

Answer

LTOT only if 6-minute walk test abnormal

Answer

Short course oxygen for 2 weeks only

us-usmle-step-2 MCQ (SBA): COPD (LTOT)