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Various oxygen delivery devices.
| Device | Flow (L/minute) | Achievable FiO2 |
|---|---|---|
| Nasal cannula | 3–6 | Maximum ∼30% |
| Simple mask | 6–8 | Maximum ∼60% |
| Rebreathing mask | 10–12 | Maximum ∼80% |
| Nonrebreather mask | 12–15 | Maximum ∼95% |
| High-flow nasal cannula | 25–60 | 40–100% |
| Intubation | 30–40 | Any FiO2 |
