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Annals of Intensive Care
Fig. 1 | Annals of Intensive Care

Fig. 1

From: Optimizing high-flow nasal cannula flow settings in adult hypoxemic patients based on peak inspiratory flow during tidal breathing

Fig. 1

The correlation between SpO2/FIO2 ratio and flow ratio. The flow ratio of setting HFNC flow to the patient’s peak tidal inspiratory flow is shown on the X-axis. The ratio of patients’ SpO2/FIO2 at one flow setting to SpO2/FIO2 achieved when HFNC flow was set to match patient’s peak inspiratory flow during tidal breathing (matching flow) is shown on the Y-axis. The scatterplot shows significant correlation between the two ratios. SpO2, pulse oximetry; FIO2, fraction of inspired oxygen; HFNC, high-flow nasal cannula.

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