Which of the following conditions indicate a need for oxygen therapy, regardless of condition?
    I. Pao2 less than 60 mm Hg breathing room air
    II. Spo2 less than 90% breathing room air
    III. Disorientation
A.  I and II
B.  I and III
C.  II and III
D.  I, II, and III

A

This graph shows the relationship between Pao2 and Paco2. A reduction in alveolar ventilation causes Paco2 to increase and Pao2 to

A.  Disappear
B.  Decrease
C.  Stay the same
D.  Increase

B

What would be the general approach for treating hypoxemia in a post-operative patient?
A.  Treat with O2 to maintain adequate Spo2.
B.  Treat with O2 and PEEP to maintain adequate Pao2.
C.  Consider hyperbaric oxygen treatment.
D.  Use 100% O2 with bag–valve ventilation.

A

A respiratory therapist is using a single–flow restrictor on the patient. What can be done to change the flow?
A.  Adjust the flow pressure from the ventilator.
B.  Use a different concentration of O2.
C.  Replace the flow restrictor with one with a different–sized orifice.
D.  Use a different size nasal cannula.

C

A patient presents with carbon monoxide poisoning. Why do respiratory therapists often use 100% O2 in conjunction with hyperbaric conditions to achieve the highest Pao2 possible?
A.  The high Pao2 results in a more rapid dissociation of carbon monoxide from hemoglobin.
B.  It prevents cor pulmonale.
C.  It also increases the concentration of CO2 in the blood.
D.  It minimizes the quantity of O2 dissolved in serum.

A

How would you prevent a patient with chronic hypercarbia from developing oxygen-induced hypoventilation?
A.  Titrate Fio2 to highest possible Spo2.
B.  Ambulate patient as quickly as possible.
C.  Limit O2 to minimum necessary to correct hypoexmia with a target of 88-92%.
D.  Maintain  levels of  Pao2  in the 95-97 mm Hg range

C

To minimize the effects of high concentrations of oxygen, what possible strategy can respiratory therapists use when an Fio2 > 0.6 is required?
A.  Patient ambulation, coughing and deep breathing
B.  Application of CPAP or mechanical ventilation with PEEP
C.  Maintain a Pao2   in the normal range of 95-97 mm Hg
D.  Use only low-flow oxygen delivery systems.

B

All of the following are conditions associated with chronic hypercarbia EXCEPT
A.  Carbon monoxide poisoning
B.  Amyotrophic lateral sclerosis (ALS)
C.  Narcotic drug overdose
D.  Obesity hypoventilation syndrome

A

What is a problem with Bourdon guage flow meters when the flow guage is completely obstructed?
A.  The guage shows no flow.
B.  The guage shows a high level of flow.
C.  The guage shows a low level of flow.
D.  The guage shows that there is flow when there is none.

D

Which of the following is the most common type of dosage regulation device used in hospitals for direct, quick-connect application to piped outlet stations?
A.  Bourdon gauge flow meter
B.  Flow restrictor
C.  Thermal flow meter
D.  Thorpe tube flow meter

D

When using a simple oxygen mask, what is the minimum flow required to avoid accumulation of CO2 in the mask?
A.  2 L/min
B.  3 L/min
C.  4 L/min
D.  5 L/min

D

Use all of the following prevent the rebound effects during withdrawal of inhaled NO EXCEPT:
A.  Use the highest effective NO dose
B.  Do not withdraw inhaled NO until the patient’s status has improved sufficiently.
C.  Set the NO does for a short time before discontinuing NO.
D.  Increase the Fio2 before withdrawal of inhaled NO.

A

Which of the following can alter the FIO2 delivered by the nasal cannula?
  I.  The oxygen flow to the cannula
  II.  The patient’s respiratory rate
  III.  The patient’s tidal volume
  IV.  Proportion of nose vs. mouth breathing
A.    I only
B.    I and II only
C.    I, II, and III only
D.    I, II, III, and IV

C