At a flow rate of 6 L/min, a nasal cannula can deliver an approximate oxygen concentration of up to:

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Study for the Nassau County EMT Test. Prepare with flashcards and multiple-choice questions. Each question is accompanied by hints and explanations. Get ready for your exam!

Multiple Choice

At a flow rate of 6 L/min, a nasal cannula can deliver an approximate oxygen concentration of up to:

Explanation:
Nasal cannula oxygen delivery is limited by how it blends supplemental oxygen with room air as you inhale. At a flow rate of 6 L/min, the mix typically provides about 44% oxygen, which is the practical upper limit for this device. The FiO2 increases with higher flow, roughly starting around 24% at very low flows and rising with each additional liter, but it cannot reach very high concentrations like 60% or 80% with a nasal cannula. For higher oxygen concentrations, a nonrebreather or other high FiO2 delivery method would be needed.

Nasal cannula oxygen delivery is limited by how it blends supplemental oxygen with room air as you inhale. At a flow rate of 6 L/min, the mix typically provides about 44% oxygen, which is the practical upper limit for this device. The FiO2 increases with higher flow, roughly starting around 24% at very low flows and rising with each additional liter, but it cannot reach very high concentrations like 60% or 80% with a nasal cannula. For higher oxygen concentrations, a nonrebreather or other high FiO2 delivery method would be needed.

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