Table 7. Devices used for oxygen delivery and their flow rates.

FiO₂: fraction of inspired oxygen

Method of Oxygen Delivery	Flow Rate	FiO2	Reservoir Size
Nasal cannula [94]	1-6 L/min	0.22 to 0.24 at 1 L/min, 0.4 at 5-6 L/min	-
Simple mask [94]	5-10 L/min	0.3-0.8 L/min	100-200 mL
Non-rebreather [94]	15 L/min	0.6-0.9 L/min	300-600 mL
OptiflowTM [94, 95]	60 L/min	0.3 L/min	-