Figure 1From: Nasal high–flow oxygen therapy in patients with hypoxic respiratory failure: effect on functional and subjective respiratory parameters compared to conventional oxygen therapy and non-invasive ventilation (NIV) Flowchart. During the intervention patients were treated in a randomized order with either high-flow nasal cannula (HFNC), Venturi-mask (VM) or with none - invasive ventilation (NIV).Back to article page