The nurse is caring for a client who is on 2 L/minute of oxygen via nasal cannula. The nurse understands that this flow rate corresponds to which FiO2?

Number 2 is correct.

Rationale: Oxygen delivery at 2 L/minute via nasal cannula is equivalent to 28% FiO2. A flow rate of 1 L/minute is equal to 24% FiO2. A flow rate of 3 L/minute is equal to 32% FiO2. A flow rate of 4 L/minute is equivalent to 36% FiO2.