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. Author manuscript; available in PMC: 2025 Apr 1.

Published in final edited form as: Crit Care Clin. 2024 Jan 25;40(2):235–253. doi: 10.1016/j.ccc.2024.01.002

Table 2:

Oxygen delivery devices

Oxygen delivery device	Deliverable flow rates (L·min⁻¹)	Estimated FiO2 (%)
Nasal cannula	1–2	24–28
	3–4	20–35
	5–6	38–44
Simple face mask	5–10	35–55
Venturi mask^*	5–15	24–50
Non-rebreather mask^*	10–15	80–95
High-flow nasal cannula^*	Up to 60	30–100

^*

High-flow oxygen delivery modalities