Comparison of Transnasal Humidified Rapid-Insufflation Ventilatory Exchange and Facemasks in Preoxygenation: A Systematic Review and Meta-Analysis

Figure 3

(a) Time is taken for intubation. (b) Apnea time. (c) PaO₂ after preoxygenation. (d) SpO₂ after successful intubation. (e) PCO₂ after complete paralysis or intubation preoxygenation. For each trial, the square depicts the mean difference and the horizontal lines on either side of it represent the 95% CI. The summary result is presented as a diamond. IV: inverse variance.

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