Fig. 1. The high flow nasal cannula (HFNC) system incorporated an air/O2 blender with a flow meter and a heated humidifier. For the HFNC protocols, nasal prongs were connected to the manufacturer's standard circuit. We made 2 holes in a polyvinyl chloride cylinder to simulate adult external...
Difference in PaO2/FiO2 between high-flow nasal cannula and Venturi mask in hypoxemic COVID-19 patientsThe ratio between arterial blood partial pressure of oxygen and fraction of inspired oxygen (PaO 2 /FiO 2 ) was largely used for grading and managing the respiratory failure in non-mechanically...