What oxygen concentration range would be expected from a nasal cannula?

When using a nasal cannula, the expected oxygen concentration range is indeed between 24-36%. This range is based on the fact that a nasal cannula typically delivers oxygen at a flow rate of 1 to 6 liters per minute. Each liter of oxygen added generally increases the fraction of inspired oxygen (FiO2) by about 4%. Therefore, at 1 liter per minute, the concentration would be approximately 24%, and as the flow increases to 6 liters per minute, it rises to about 36%.

This range is considered effective for patients who require supplemental oxygen without the need for more invasive delivery methods. Other delivery devices, such as face masks or non-rebreather masks, provide higher concentrations of oxygen, which is why the ranges in the other choices go above this value. The nasal cannula is preferred for its comfort and ease of use in patients who need moderate oxygen support.