Clinical review highlights the SpO2/FiO2 ratio as a practical surrogate for PaO2/FiO2 in acute respiratory failure, indicating strong utility for continuous bedside monitoring.
Acute hypoxemic respiratory failure (AHRF) is a highly prevalent condition in critically ill patients. Regardless of the different causes leading to AHRF, a cornerstone diagnostic tool is calculating PaO2/FiO2 from arterial blood gas analysis. Nevertheless, PaO2/FiO2 has several practical limitations: arterial puncture is a painful procedure that is technically challenging in some patients, and blood […]
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Carvalho et al. (2025) studied this question.
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