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Oxygen Delivery Systems Quiz

#1

Which of the following oxygen delivery systems delivers the highest concentration of oxygen?

Non-rebreather mask
Explanation

Delivers highest O2 concentration due to one-way valve and reservoir bag.

#2

In a nasal cannula, at what rate (in liters per minute) does oxygen typically flow?

1-2 L/min
Explanation

Provides low-flow oxygen at 1-2 L/min.

#3

Which oxygen delivery system is commonly used in patients with chronic obstructive pulmonary disease (COPD)?

Venturi mask
Explanation

Suitable for COPD patients needing controlled FiO2.

#4

What is the purpose of a reservoir bag in an oxygen mask?

To store excess oxygen for inhalation during inspiration
Explanation

Stores O2 during exhalation to ensure continuous flow.

#5

What is the purpose of humidification in oxygen therapy?

To prevent drying of the mucous membranes
Explanation

Prevents drying of mucous membranes to enhance comfort.

#6

Which oxygen delivery system allows the patient to rebreathe a portion of exhaled air?

Partial rebreather mask
Explanation

Allows partial rebreathing to increase O2 concentration.

#7

What is the maximum oxygen flow rate for a nasal cannula?

10 L/min
Explanation

Maximum flow rate for adequate oxygenation.

#8

What is the typical FiO2 (Fraction of Inspired Oxygen) delivered by a nasal cannula?

0.21
Explanation

Delivers atmospheric O2 concentration.

#9

Which oxygen delivery system is often used in post-operative care for patients who require low to moderate levels of supplemental oxygen?

Simple face mask
Explanation

Provides low to moderate O2 supplementation post-operatively.

#10

What is the primary risk associated with using a non-rebreather mask?

Hypercarbia
Explanation

Potential for CO2 retention leading to hypercarbia.

#11

What is the typical flow rate (in liters per minute) for a non-rebreather mask?

6-10 L/min
Explanation

Provides high-flow oxygen typically at 6-10 L/min.

#12

Which oxygen delivery system is often used for patients who require precise FiO2 control and have stable respiratory conditions?

Venturi mask
Explanation

Ensures precise FiO2 without risk of CO2 retention.

#13

What is the primary disadvantage of using a simple face mask?

Risk of rebreathing CO2
Explanation

Potential for CO2 buildup due to incomplete sealing.

#14

Which oxygen delivery system is commonly used for patients undergoing diagnostic procedures such as bronchoscopy?

High-flow nasal cannula (HFNC)
Explanation

Allows uninterrupted O2 during procedures.

#15

What is the typical flow rate (in liters per minute) for a partial rebreather mask?

6-10 L/min
Explanation

Delivers high-flow O2 with partial CO2 rebreathing.

#16

What is the purpose of the reservoir bag in a non-rebreather mask?

To store oxygen during exhalation
Explanation

Stores O2 for patient during inhalation and prevents CO2 buildup.

#17

Which oxygen delivery system provides a precise oxygen concentration regardless of the patient's breathing pattern?

Venturi mask
Explanation

Maintains constant FiO2 independent of breathing.

#18

In which scenario would a non-rebreather mask be contraindicated?

During chest trauma
Explanation

Risk of exacerbating pneumothorax or worsening respiratory status.

#19

Which oxygen delivery system is most suitable for patients requiring long-term oxygen therapy at home?

Oxygen concentrator
Explanation

Provides continuous oxygen supply without refills.

#20

Which oxygen delivery system should be used in cases of severe upper airway obstruction?

Bag-valve-mask (BVM)
Explanation

Provides positive pressure ventilation in upper airway obstruction.

#21

Which oxygen delivery system provides the most precise control over FiO2?

Venturi mask
Explanation

Offers accurate FiO2 control with interchangeable adapters.

#22

In which situation is a high-flow nasal cannula (HFNC) typically used?

Post-extubation respiratory support
Explanation

Provides comfortable, humidified O2 post-extubation.

#23

Which oxygen delivery system is least likely to dry out the patient's mucous membranes?

High-flow nasal cannula (HFNC)
Explanation

Delivers warm, humidified O2 to prevent mucous membrane drying.

#24

Which oxygen delivery system should be avoided in patients with facial trauma or burns?

Simple face mask
Explanation

May exacerbate pain and compromise airway in facial trauma.

#25

Which oxygen delivery system is often used during emergency resuscitation efforts?

Non-rebreather mask
Explanation

Ensures high O2 delivery during CPR.

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