Using the same FiO2 estimation formula, what is the FiO2 at 6 L/min?

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Multiple Choice

Using the same FiO2 estimation formula, what is the FiO2 at 6 L/min?

Explanation:
The estimate uses nasal cannula math: start with room-air FiO2 of 0.21, and add about 0.04 (4 percentage points) for every liter per minute of flow, up to about 6 L/min. So at 6 L/min: 0.21 + (6 × 0.04) = 0.21 + 0.24 = 0.45. This is the reason 0.45 is the best pick. Keep in mind this is a rough estimate and actual FiO2 can vary with fit, breathing pattern, and device.

The estimate uses nasal cannula math: start with room-air FiO2 of 0.21, and add about 0.04 (4 percentage points) for every liter per minute of flow, up to about 6 L/min. So at 6 L/min: 0.21 + (6 × 0.04) = 0.21 + 0.24 = 0.45. This is the reason 0.45 is the best pick. Keep in mind this is a rough estimate and actual FiO2 can vary with fit, breathing pattern, and device.

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