Fig. 1From: The effects of a 2-h trial of high-flow oxygen by nasal cannula versus Venturi mask in immunocompromised patients with hypoxemic acute respiratory failure: a multicenter randomized trialPatient flowchart. HFNO high-flow nasal oxygen, ICU intensive care unit, IMV invasive mechanical ventilation, NIV noninvasive ventilation, VAS visual analogue scaleBack to article page