Egans Medical Gases {Storage and Delivery, Therapy, respiratory
therapeutic study guide for exam 1}
Comprehensive Resource To Help You Ace 2026-2027 Exams
Includes Frequently Tested Questions With ELABORATED
100% Correct COMPLETE SOLUTIONS
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1. Compared to air, the density of an 80% He and 20% O2 mixture is about which
of the following?
A) Two-thirds as much
B) One-half as much
C) One-third as much
D) One-fifth as much
- Correct Answer: C) One-third as much
2. Before administering a helium-O2 mixture to a patient with large airway
obstruction, what should you do?
A) Analyze the helium concentration of the mixture.
B) Heat the cylinder to ensure complete mixing of contents.
C) Analyze the O2 concentration of the mixture.
D) Roll the cylinder to ensure complete mixing of contents.
- Correct Answer: C) Analyze the O2 concentration of the mixture.
3. A well-fitted nonrebreathing mask, adjusted so that the patient's inhalation
does not deflate the bag (flows approximately 10 L/min), should provide inspired
O2 concentrations in what range?
A) 55% to 70%
,B) 45% to 60%
C) 75% to 90%
D) 70% to 85%
- Correct Answer: A) 55% to 70%
5. Directing a cool O2 mixture to an infant in an Oxy-Hood can result in which of
the following?
1. Increased O2 consumption
2. Increased convective heat loss
3. Apnea (cessation of breathing)
A) 1 and 2 only
B) 2 and 3 only
C) 1 and 3 only
D) 1, 2, and 3
- Correct Answer: D) 1, 2, and 3
6. During hyperbaric oxygen therapy at 3 ATA, plasma contains about how much
dissolved O2?
A) 1 ml/dl
B) 3 ml/dl
C) 5 ml/dl
D) 7 ml/dl
- Correct Answer: D) 7 ml/dl
7. Which of the following statements are true about low-flow O2 delivery
systems?1. The greater the patient's inspiratory flow, the greater is the FiO2.
2. All low-flow devices provide variable O2 concentrations.
,3. The O2 provided by a low-flow device is diluted with air.
4. The patient's flow usually exceeds that from a low-flow device.
A) 1 and 3 only
B) 1, 2, and 3 only
C) 3 and 4 only
D) 2, 3, and 4 only
- Correct Answer: D) 2, 3, and 4 only
8. A variant of a common low-flow, nasal O2 delivery device that is capable of
providing both high humidity and a high FiO2 is known as which of the following?
A) High-flow nasal cannula
B) Transtracheal catheter
C) Nasal catheter
D) Demand-flow oxygen
- Correct Answer: A) High-flow nasal cannula
9. A true high-flow O2 delivery system should provide at least what flow?
A) 60 L/min
B) 50 L/min
C) 40 L/min
D) 30 L/min
- Correct Answer: A) 60 L/min
10. What is the minimum flow setting for a simple mask applied to an adult?
A) 3 L/min
B) 5 L/min
C) 8 L/min
D) 10 L/min
, - Correct Answer: B) 5 L/min
11. Properly applied O2 therapy can decrease which of the following?
1. Ventilatory demand
2. Work of breathing
3. Cardiac output
A) 2 and 3 only
B) 1 and 2 only
C) 1, 2, and 3
D) 1 and 3 only
- Correct Answer: C) 1, 2, and 3
12. Disadvantages of standard O2 masks include which of the following?
1. Being difficult to apply to patients.
2. Patient discomfort (straps and heat).
3. Increasing the risk of aspiration.
4. Must be removed for eating.
A) 1 and 3 only
B) 1, 2, and 3 only
C) 3 and 4 only
D) 2, 3, and 4 only
- Correct Answer: D) 2, 3, and 4 only
13. A cooperative and alert postoperative patient who is able to eat requires a
continuous but low FiO2. Precise FiO2 concentrations are not needed. Which of
the following devices would best achieve this end?
A) Simple O2 mask
B) Air-entrainment mask
therapeutic study guide for exam 1}
Comprehensive Resource To Help You Ace 2026-2027 Exams
Includes Frequently Tested Questions With ELABORATED
100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
Instant Download Pdf
1. Compared to air, the density of an 80% He and 20% O2 mixture is about which
of the following?
A) Two-thirds as much
B) One-half as much
C) One-third as much
D) One-fifth as much
- Correct Answer: C) One-third as much
2. Before administering a helium-O2 mixture to a patient with large airway
obstruction, what should you do?
A) Analyze the helium concentration of the mixture.
B) Heat the cylinder to ensure complete mixing of contents.
C) Analyze the O2 concentration of the mixture.
D) Roll the cylinder to ensure complete mixing of contents.
- Correct Answer: C) Analyze the O2 concentration of the mixture.
3. A well-fitted nonrebreathing mask, adjusted so that the patient's inhalation
does not deflate the bag (flows approximately 10 L/min), should provide inspired
O2 concentrations in what range?
A) 55% to 70%
,B) 45% to 60%
C) 75% to 90%
D) 70% to 85%
- Correct Answer: A) 55% to 70%
5. Directing a cool O2 mixture to an infant in an Oxy-Hood can result in which of
the following?
1. Increased O2 consumption
2. Increased convective heat loss
3. Apnea (cessation of breathing)
A) 1 and 2 only
B) 2 and 3 only
C) 1 and 3 only
D) 1, 2, and 3
- Correct Answer: D) 1, 2, and 3
6. During hyperbaric oxygen therapy at 3 ATA, plasma contains about how much
dissolved O2?
A) 1 ml/dl
B) 3 ml/dl
C) 5 ml/dl
D) 7 ml/dl
- Correct Answer: D) 7 ml/dl
7. Which of the following statements are true about low-flow O2 delivery
systems?1. The greater the patient's inspiratory flow, the greater is the FiO2.
2. All low-flow devices provide variable O2 concentrations.
,3. The O2 provided by a low-flow device is diluted with air.
4. The patient's flow usually exceeds that from a low-flow device.
A) 1 and 3 only
B) 1, 2, and 3 only
C) 3 and 4 only
D) 2, 3, and 4 only
- Correct Answer: D) 2, 3, and 4 only
8. A variant of a common low-flow, nasal O2 delivery device that is capable of
providing both high humidity and a high FiO2 is known as which of the following?
A) High-flow nasal cannula
B) Transtracheal catheter
C) Nasal catheter
D) Demand-flow oxygen
- Correct Answer: A) High-flow nasal cannula
9. A true high-flow O2 delivery system should provide at least what flow?
A) 60 L/min
B) 50 L/min
C) 40 L/min
D) 30 L/min
- Correct Answer: A) 60 L/min
10. What is the minimum flow setting for a simple mask applied to an adult?
A) 3 L/min
B) 5 L/min
C) 8 L/min
D) 10 L/min
, - Correct Answer: B) 5 L/min
11. Properly applied O2 therapy can decrease which of the following?
1. Ventilatory demand
2. Work of breathing
3. Cardiac output
A) 2 and 3 only
B) 1 and 2 only
C) 1, 2, and 3
D) 1 and 3 only
- Correct Answer: C) 1, 2, and 3
12. Disadvantages of standard O2 masks include which of the following?
1. Being difficult to apply to patients.
2. Patient discomfort (straps and heat).
3. Increasing the risk of aspiration.
4. Must be removed for eating.
A) 1 and 3 only
B) 1, 2, and 3 only
C) 3 and 4 only
D) 2, 3, and 4 only
- Correct Answer: D) 2, 3, and 4 only
13. A cooperative and alert postoperative patient who is able to eat requires a
continuous but low FiO2. Precise FiO2 concentrations are not needed. Which of
the following devices would best achieve this end?
A) Simple O2 mask
B) Air-entrainment mask
