Oxygen Delivery Devices Questions with Correct Answers (Grade
A+)
Question 1: Nasal Cannula
Answer: Most patients tolerate this device well, and it is simpler to use than a mask. The fraction of inspired
oxygen (FiO₂) varies depending on the flow of oxygen in L/min and the rate and depth of the patient's
breathing.
Question 2: Nasal Cannula flow rates
Answer: FiO₂: 24% to 28% - Flow: 1 to 2 L FiO₂: 32% to 36% - Flow: 3 to 4 L FiO₂: 40% to 44% - Flow: 5
to 6 L
Question 3: Simple face mask
Answer: This device requires a fairly high oxygen flow to prevent rebreathing of carbon dioxide. About
75% of the inspired volume is room air that the patient breathes through the holes in the side of the mask.
An accurate FiO₂ is difficult to estimate. A simple mask is usually used for patients who require a moderate
flow rate for a short period of time.
Question 4: Simple face mask flow rate
Answer: FiO₂: 40% to 60% - Flow: 5 to 10 L
Question 5: Nonrebreather face mask
Answer: The reservoir bag allows a higher FiO₂ to be administered. At flow rates slower than 6 L/min, the
risk of rebreathing carbon dioxide increases. A valve closes during expiration so that exhaled air does not
enter the reservoir bag and is not rebreathed. The valves on the side ports of the mask allow exhalation but
close on inspiration to prevent inhalation of room air. This device is used to deliver high flow rates and high
concentrations of oxygen.
Question 6: Nonrebreather face mask flow rate
Answer: FiO₂: 80% to 100% - Flow: Liter maintaining reservoir bag 2/3 full --> 15 L/min MAX A
nonrebreather mask can deliver oxygen concentrations of 80% to 95% with flow rates from 10 to 15 L/min.
When using a nonrebreather mask, do not allow the reservoir bag to deflate or the oxygen source to deplete.
If the bag deflates or the oxygen source diminishes, the patient is likely to breathe in large amounts of
exhaled carbon dioxide.
Question 7: Partial rebreather flow rate and notes
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A+)
Question 1: Nasal Cannula
Answer: Most patients tolerate this device well, and it is simpler to use than a mask. The fraction of inspired
oxygen (FiO₂) varies depending on the flow of oxygen in L/min and the rate and depth of the patient's
breathing.
Question 2: Nasal Cannula flow rates
Answer: FiO₂: 24% to 28% - Flow: 1 to 2 L FiO₂: 32% to 36% - Flow: 3 to 4 L FiO₂: 40% to 44% - Flow: 5
to 6 L
Question 3: Simple face mask
Answer: This device requires a fairly high oxygen flow to prevent rebreathing of carbon dioxide. About
75% of the inspired volume is room air that the patient breathes through the holes in the side of the mask.
An accurate FiO₂ is difficult to estimate. A simple mask is usually used for patients who require a moderate
flow rate for a short period of time.
Question 4: Simple face mask flow rate
Answer: FiO₂: 40% to 60% - Flow: 5 to 10 L
Question 5: Nonrebreather face mask
Answer: The reservoir bag allows a higher FiO₂ to be administered. At flow rates slower than 6 L/min, the
risk of rebreathing carbon dioxide increases. A valve closes during expiration so that exhaled air does not
enter the reservoir bag and is not rebreathed. The valves on the side ports of the mask allow exhalation but
close on inspiration to prevent inhalation of room air. This device is used to deliver high flow rates and high
concentrations of oxygen.
Question 6: Nonrebreather face mask flow rate
Answer: FiO₂: 80% to 100% - Flow: Liter maintaining reservoir bag 2/3 full --> 15 L/min MAX A
nonrebreather mask can deliver oxygen concentrations of 80% to 95% with flow rates from 10 to 15 L/min.
When using a nonrebreather mask, do not allow the reservoir bag to deflate or the oxygen source to deplete.
If the bag deflates or the oxygen source diminishes, the patient is likely to breathe in large amounts of
exhaled carbon dioxide.
Question 7: Partial rebreather flow rate and notes
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