Retrospective study shows that the non-invasive FOx index predicts treatment success in acute respiratory failure, indicating its potential for bedside monitoring.
Predicting success of a therapy in acute respiratory failure is clinically important. The FOx index (high‐flow rate × FiO2)/SpO2 was retrospectively applied to 70 patients who required high‐flow nasal prongs for hypoxaemic and hypercapnic respiratory failure. The FOx index could predict between success and failure of high‐flow nasal prongs at 6 hours, using non‐invasive markers. This adds to the clinician's toolbox in managing respiratory failure and represents important proof of concept for a prospective study.
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Carroll et al. (2022) studied this question.
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