Which of the following levels would be classified as a low-flow system of oxygen administration?
a. O2 via nasal cannula at 4 L/min
b. O2 via nasal catheter at a FiO2 range of 60% to 75%
c. O2 via transtracheal catheter at 10 L/min
d. O2 via simple mask at 12 L/min.
A
A low-flow oxygen delivery system provides supplemental oxygen directly into the patient's airway at a flow of 8 L/min or less. Because this flow is insufficient to meet the patient's inspiratory volume requirements, it results in a variable FiO2 as the supplemental oxygen is mixed with room air. Nasal catheter FiO2 range is 22% to 45%. Oxygen flow through a transtracheal catheter is 0.25 to 4 L/min. A simple mask is a reservoir delivery system.
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