Oxygen delivery systems....numbers that you forget

Device/System	Oxygen Flow Rate (L/min)	FIO₂ Range
Nasal cannula	1	0.21–0.24
	2	0.23–0.28
	3	0.27–0.34
	4	0.31–0.38
	5–6	0.32–0.44
Simple masks	5–6	0.30–0.45
Simple masks	7–8	0.40–0.60
Masks with reservoirs	5	0.35–0.50
Partial rebreathing mask-bag	7	0.35–0.75
Partial rebreathing mask-bag	15	0.65–1.00
Nonrebreathing mask-bag	7–15	0.40–1.00
Venturi masks and jet nebulizers	4–6 (total flow = 15)	0.24
	4–6 (total flow = 45)	0.28
	8–10 (total flow = 45)	0.35
	8–10 (total flow = 33)	0.40
	8–12 (total flow = 33)	0.50

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