American Society of Anesthesiologists

Fig. 3.

$Time course of Pao2/Fio2 (mmHg) (A), driving pressure during mechanical ventilation (cm H2O) (B), and distribution of regional ventilation of tidal volume (VT) distributed to the nondependent lung calculated from electrical impedance tomography (%) (C). Points represent estimated means, and whiskers indicate the standard errors from the linear mixed models. The intraoperative measurement point was made 30 min before the estimated end of the surgical procedure. The arterial blood gas analysis for measurement of Pao2/Fio2 was obtained after a 3-min period with an Fio2 of 1.0. Fio2, fraction of inspired oxygen; Pao2, partial pressure of oxygen in arterial blood; PEEP, positive end-expiratory pressure.$

Time course of Pao₂/Fio₂ (mmHg) (A), driving pressure during mechanical ventilation (cm H₂O) (B), and distribution of regional ventilation of tidal volume (V_T) distributed to the nondependent lung calculated from electrical impedance tomography (%) (C). Points represent estimated means, and whiskers indicate the standard errors from the linear mixed models. The intraoperative measurement point was made 30 min before the estimated end of the surgical procedure. The arterial blood gas analysis for measurement of Pao₂/Fio₂ was obtained after a 3-min period with an Fio₂ of 1.0. Fio₂, fraction of inspired oxygen; Pao₂, partial pressure of oxygen in arterial blood; PEEP, positive end-expiratory pressure.

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