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Table 1 Indications for NIV and HFNC in the setting of Acute Respiratory Failure

From: Noninvasive respiratory support for COVID-19 patients: when, for whom, and how?

Indications for NIV in the Setting of Acute Respiratory Failure
1) Known patient history of OSA, COPD, congestive heart failure, or cardiogenic pulmonary edema [46, 47]
2) Hypercapnic respiratory failure
3) Dyspnea or staccato speech [48, 49]
Indications for HFNC in the Setting of Acute Respiratory Failure
1) PaO2 < 65 or SpO2 < 90% on supplemental oxygen [48]
2) RR > 25 [49]
3) Mild ARDS as defined by PaO2/FiO2 < 300 but > 200 [24, 49]