Journal of advanced nursing
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To assess whether the application of a non-invasive tool, such as ratio of oxygen saturation (ROX) index, during triage can identify patients with COVID-19 at high risk of developing acute respiratory distress syndrome (ARDS). ⋯ During the difficult triage evaluation of COVID-19 patients, the ROX index can help the nurse to identify the real severity of the patient. The triage systems could integrate the ROX in the rapid patient assessment to stratify patients more accurately.