Question 1

A patient is receiving 0.30 FɪO₂ with a barometric pressure at 750 mm Hg.The partial pressure of carbon dioxide (PCO₂₎ for this patient is 70 mm Hg; the partial pressure of arterial oxygen (PaO₂)is 60 mm Hg.The PAO₂ for this patient is _____ mm Hg.

Accepted Answer

A)  100.2 
B)  123.4 
C)  160.0 
D)  181.7

Question 2

A patient has a 0.40 air-entrainment mask on and is not tolerating it well at this time because of claustrophobia. A nasal cannula is placed on the patient.What liter flow should be set to match the appropriate FɪO₂?

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  5

Question 3

Pressure-compensated flowmeters provide which of the following?

Accepted Answer

A)  Inaccurate estimates of flow 
B)  Accurate estimates of flow 
C)  Back pressure 
D)  A means to estimate leaks

Question 4

The main goal of a pulse-demand oxygen-delivery system is which of the following?
1)To provide oxygen only during expiration
2)To provide oxygen only during inspiration
3)To deliver oxygen to the patient only after a sufficient inspiratory effort is made and the demand valve opens
4)To deliver oxygen at a preset flow rate and close during inspiration to conserve oxygen

Accepted Answer

A)  1 and 3 
B)  2 and 4 
C)  2 and 3 
D)  1 and 4

Question 5

What type of oxygen device is used to administer heliox to a non-intubated patient?

Accepted Answer

A)  Nasal cannula 
B)  High-flow cannula 
C)  Simple mask 
D)  Nonrebreathing mask

Question 6

High-flow devices include which of the following?
1)Nasal cannula
2)Venturi mask
3)Mask with reservoir bag
4)Oxygen hoods

Accepted Answer

A)  1 and 2 
B)  2 and 3 
C)  3 and 4 
D)  2 and 4

Question 7

Which of the following are advantages of transtracheal catheters?
1)Increase patient mobility
2)Improve patient compliance because of an enhanced cosmetic appearance
3)Increase the amounts of nasal irritation
4)Heighten the risk for mucus plugging

Accepted Answer

A)  1,2,and 3 
B)  2 and 3 
C)  1 and 2 
D)  1,2,3,and 4

Question 8

Which type of therapy has been used to successfully treat persistent pulmonary hypertension in newborns?

Accepted Answer

A)  Helium-oxygen (heliox) 
B)  Nitric oxide 
C)  Bronchial hygiene 
D)  Carbon dioxide-nitrogen (carbogen)

Question 9

To prevent an adverse reaction,it is essential to monitor which of the following when administering carbogen to a patient?
1)Heart rate
2)Blood pressure
3)Respirations
4)The patient's mental status

Accepted Answer

A)  1,2,and 3 
B)  1,2,and 4 
C)  2,3,and 4 
D)  1,2,3,and 4

Question 10

A patient with pulmonary fibrosis comes to the emergency department with an SpO₂ of 87% and a respiratory rate of 28 breaths/min.The patient is unsure whether her transtracheal catheter is working properly; what is your first action?

Accepted Answer

A)  Intubate her. 
B)  Examine her for a mucus plug. 
C)  Place a nasal cannula on her. 
D)  Place a lavage catheter.

Question 11

A patient is receiving supplemental oxygen at a flow of 4 L/min.Assessment reveals that there is clouding of the mask.What step should be taken to resolve this situation?

Accepted Answer

A)  Change to a nasal cannula at 2 L/min. 
B)  Increase the flow to 5 L/min. 
C)  Change to a 50% air-entrainment mask. 
D)  Increase the flow to 10% L/min.

Question 12

A 55-year-old man comes to the emergency department on a nonrebreathing mask with an SpO₂ of 88%.The patient was found unconscious in a running car in the garage.Carbon monoxide poisoning is a concern at this time.What should the respiratory care practitioner recommend to the physician at this time?

Accepted Answer

A)  Place a nasal cannula at 6 L/min on the patient. 
B)  Begin the patient on heliox therapy 80%:20%. 
C)  Place the patient on carbogen therapy 5%:95%. 
D)  Set the patient up on an air-entrainment device at 0.50 FɪO₂.

Question 13

Which device is more precise in terms of controlling gas pressure?

Accepted Answer

A)  Bourdon flowmeter 
B)  Thorpe tube flowmeter 
C)  Multistage regulator 
D)  Flow restrictors

Question 14

The characteristic(s)of low-flow devices is (are):
1)fractional inspired oxygen (FɪO₂)from 0.22 to 0.60.
2)make use of a nasal cannula.
3)make use of a Venturi mask.
4)make use of a transtracheal catheter.

Accepted Answer

A)  1,2,and 4 
B)  1 and 4 
C)  1 
D)  1,2,3,and 4

Question 15

A nasal cannula that delivers 5 L/min translates to what approximate FɪO₂?

Accepted Answer

A)  36% 
B)  28% 
C)  40% 
D)  44%

Question 16

Which regulator supports the theory that gas pressure is gradually reduced as gas flows from a high-pressure source through a series of stages to the outlet?

Accepted Answer

A)  Single-stage regulator 
B)  Flowmeter 
C)  Preset regulator 
D)  Multistage regulator

Question 17

Complications of transtracheal oxygen catheters are:

Accepted Answer

A)  subcutaneous emphysema. 
B)  mucus-plugging. 
C)  infection. 
D)  all of the above.

Question 18

What criteria must a patient meet for home oxygen therapy,according to AARC Clinical Practice Guidelines (2002 Revision)?
1)PaO₂ 60 mm Hg

Accepted Answer

A)  1,2,and 4 
B)  2,3,and 4 
C)  1,2,and 3 
D)  2 and 3

Question 19

The partial pressure of alveolar oxygen (PAO₂)when the atmospheric pressure is 3 atmospheric pressure (atm),the PACO₂ is 40 mm Hg,and the FɪO₂ is 0.80 is _____ mm Hg.

Accepted Answer

A)  2280 
B)  1784 
C)  1736 
D)  1500

Question 20

O₂-induced hypoventilation is more likely to occur with which oxygen-delivery device?

Accepted Answer

A)  Simple mask 
B)  Nasal cannula 
C)  Venturi mask 
D)  Large-volume nebulizer

Exam 4: Administering Medical Gases: Regulators, Flowmeters, and

A patient is receiving 0.30 FɪO₂ with a barometric pressure at 750 mm Hg.The partial pressure of carbon dioxide (PCO₂₎ for this patient is 70 mm Hg; the partial pressure of arterial oxygen (PaO₂) is 60 mm Hg.The PAO₂ for this patient is _____ mm Hg.

A patient has a 0.40 air-entrainment mask on and is not tolerating it well at this time because of claustrophobia. A nasal cannula is placed on the patient.What liter flow should be set to match the appropriate FɪO₂?

Pressure-compensated flowmeters provide which of the following?

What type of oxygen device is used to administer heliox to a non-intubated patient?

High-flow devices include which of the following? 1) Nasal cannula 2) Venturi mask 3) Mask with reservoir bag 4) Oxygen hoods

Which of the following are advantages of transtracheal catheters? 1) Increase patient mobility 2) Improve patient compliance because of an enhanced cosmetic appearance 3) Increase the amounts of nasal irritation 4) Heighten the risk for mucus plugging

Which type of therapy has been used to successfully treat persistent pulmonary hypertension in newborns?

To prevent an adverse reaction,it is essential to monitor which of the following when administering carbogen to a patient? 1) Heart rate 2) Blood pressure 3) Respirations 4) The patient's mental status