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Fig. 5 | BMC Anesthesiology

Fig. 5

From: Comparison of the effectiveness of high-flow nasal oxygen vs. standard facemask oxygenation for pre- and apneic oxygenation during anesthesia induction: a systematic review and meta-analysis

Fig. 5

A Forest plots of safe apnea time in HFNO versus FMV after preoxygenation and intubation. B Forest plots of SpO2min in HFNO versus FMV during intubation. C Forest plots of the rate of desaturation in HFNO versus FMV during intubation. CI indicates confidence interval; MD, mean difference; RR, risk ratio; df, degree of freedom; HFNO, high flow nasal oxygenation; FMV, face mask ventilation; IV, inverse variance; O2, Oxygenation; SD, standard deviation

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