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. 2020 Nov 24;15:3051–3061. doi: 10.2147/COPD.S283020

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© 2020 Li et al.

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Flow of patients with acute exacerbation of chronic obstructive pulmonary disease through the trial.

Abbreviations: AECOPD, acute exacerbation of chronic obstructive pulmonary disease; COT, conventional oxygen therapy; HFNC, high-flow nasal cannula; NIV, non-invasive ventilation; PaO₂, partial pressure of oxygen; PaCO₂, partial pressure of carbon dioxide.