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Fig. 3 | BMC Anesthesiology

Fig. 3

From: Comparison of preoxygenation efficiency measured by the oxygen reserve index between high-flow nasal oxygenation and facemask ventilation: a randomised controlled trial

Fig. 3

The ORI at 1 min of preoxygenation

Violin plots show the distribution of the ORI at 1 min of preoxygenation for patients in the HFNO and facemask oxygenation groups. A boxplot comparing the ORI at 1 min of preoxygenation between the two groups, which was assessed using Student’s t-test (P < 0.01), is also shown. The horizontal bar represents the median, and the edges of the box represent the interquartile range, with the whiskers representing the lower quartile. Abbreviations: ORI, oxygen reserve index; HFNO, high-flow nasal oxygen; FMV, facemask ventilation

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BMC Anesthesiology

ISSN: 1471-2253

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