Fig. 4From: Efficacy and safety of nasal high-flow oxygen in COPD patientsOxygen requirement during nasal high-flow oxygen therapy (HFOT). Mean oxygen consumption during conventional oxygen therapy (COT) and HFOT was recorded in 77 patients with stable COPD GOLD IV(combining 50 normocapnic and 27 hypercapnic COPD patients), as assessed by blood gas analysisBack to article page