American Society of Anesthesiologists

Fig. 1.

$Method of case exclusion. ABG = arterial blood gas; Pao2/Fio2: respiratory failure of acute onset with a ratio of partial pressure of arterial oxygen (Pao2) to inspired fraction of oxygen (Fio2) (Pao2/Fio2) ratio.$

Method of case exclusion. ABG = arterial blood gas; Pao₂/Fio2: respiratory failure of acute onset with a ratio of partial pressure of arterial oxygen (Pao₂) to inspired fraction of oxygen (Fio2) (Pao₂/Fio2) ratio.

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