Deck 13: Oxygen Administration

Question 1

All of the following statements are true concerning the indications for long-term oxygen therapy (LTOT)in the home or alternate site health care facility EXCEPT ______________

A) For the treatment of documented hypoxemia.
B) LTOT has been shown to reduce
Hospitalizations and lengths of stay.
C) LTOT has been indicated to improve the effectiveness of prophylactic bronchodilator therapy.
D) LTOT has been shown to significantly
Improve survival in hypoxemic patients with chronic obstructive pulmonary disease (COPD).

Answer 1

LTOT has been indicated to improve the effectiveness of prophylactic bronchodilator therapy.

Question 2

If an air entrainment device is set to deliver an FIO₂ of 60% with the flowmeter set at 15 LPM,what would be the total flow delivered by the device?

A) 40.5 LPM
B) 60 LPM
C) 15 LPM
D) 30 LPM

Answer 2

30 LPM

Question 3

Ventilatory depression may occur in spontaneously breathing patients with elevated PaCO₂.The PaO₂ should be kept around what level to prevent this complication?

A) 60%
B) 90 mmHg
C) 40 mmHg
D) 60 mmHg

Answer 3

60 mmHg

Question 4

What is defined as a system that supplies oxygen-enriched gas as part of a patient's inspiratory flow needs?

A) High-flow oxygen delivery system
B) Low-flow oxygen delivery system
C) Partial rebreathing oxygen delivery system
D) Long-term oxygen therapy

Question 5

An air entrainment device is set to deliver 30% oxygen.If back pressure is applied by water accumulating in the device distal to the entrainment port,what will happen to the FIO₂ delivered to the patient?

A) It would decrease.
B) It would increase.
C) It would remain unchanged.
D) It would increase initially, then decrease.

Question 6

Which of the following is an advantage of a using a transtracheal catheter to deliver oxygen to a home care patient?

A) It is an invasive catheter so infection risk is minimized.
B) Routine cleaning of the device ensures continuous oxygen delivery to the patient.
C) It is a high flow oxygen delivery system so all of the patient's inspiratory demands are met.
D) Lower oxygen liter flows may be used than are required resulting in less oxygen used.

Question 7

In an average adult,it is estimated that the anatomic reservoir has a volume of approximately __________.

A) 50 cc
B) 100 cc
C) 150 cc
D) 200 cc

Question 8

A patient is admitted to the emergency department.The patient's minute volume is steady and an exact FIO₂ is not required.Which oxygen delivery device would be best to administer approximately 30% oxygen?

A) 40% Venturi
B) Nasal cannula at 2.5 LPM
C) Simple oxygen mask at 7 LPM
D) Non rebreathing mask at 15 LPM

Question 9

Which of the following statements is FALSE concerning the limitations of oxygen therapy?

A) Oxygen therapy has only limited benefit for the treatment of hypoxia due to anemia.
B) Oxygen therapy should not be used in lieu of but in addition to mechanical ventilation when ventilatory support is indicated.
C) The benefit of oxygen therapy may be limited with circulatory disturbances.
D) Supplemental oxygen should be administered with caution to patients suffering from cyanide poisoning and to patients receiving tobramycin.

Question 10

What is the primary indication for oxygen therapy?

A) Severe trauma
B) Acute myocardial infarction
C) Hypoxemia
D) Short-term therapy

Question 11

Which of the following arterial blood gas or oximetry values would be an indication for oxygen in the hospital setting?
I.PaO₂ - 50 mmHg
II.SaO₂ - 91%
III.PaO₂ - 89 mmHg
IV.SaO₂ - 60%

A) I and IV
B) II and III
C) IV only
D) I, II, and III

Question 12

If an oxygen delivery device mixes 10 LPM of air to 1 LPM of oxygen,approximately what FIO₂ is delivered by this device?

A) 24%
B) 28%
C) 30%
D) 35%

Question 13

A nasal cannula is set up on an adult patient at 3 LPM.What is the approximate FIO₂ delivered to the patient?

A) 24%
B) 28%
C) 32%
D) 36%

Question 14

What is defined as an oxygen delivery system that provides all of the total inspiratory flow required by the patient?

A) High-flow oxygen delivery system
B) Low-flow oxygen delivery system
C) Non-rebreathing oxygen delivery system
D) Reservoir oxygen delivery system

Question 15

Which of the following is an absolute contraindication to oxygen therapy?

A) Oxygen toxicity
B) Paraquat poisoning
C) Bleomycin therapy
D) There are none

Question 16

A patient is admitted to the emergency department.His minute volume is 9 LPM on admission but increases to 15 LPM as his dyspnea increases.Which oxygen delivery device would be best to administer 30% oxygen?

A) 30% Venturi
B) Nasal cannula at 2.5 LPM
C) Simple mask at 7 LPM
D) Non-rebreathing mask set to keep the reservoir full during inspiration

Question 17

If the FIO₂ is 50% or greater,all of the following hazards are possible EXCEPT ____________.

A) absorption atelectasis.
B) bacterial contamination.
C) depression of ciliary function.
D) oxygen toxicity.

Question 18

How is the liter flow determined on a partial rebreathing and a non-rebreathing mask?

A) The FIO₂ should be estimated by measuring the patient's minute volume.
B) The flow should be adjusted so that the bag is not allowed to collapse completely on inspiration
C) When the patient states that his/her shortness of breath is relieved.
D) By measuring the patient's SpO₂ and increasing the FIO₂ until the hypoxia is corrected.

Question 19

Because low-flow devices provide only part of the inspiratory needs,the delivered fraction of inspired oxygen may vary depending on several factors.Which of the following is NOT one of those factors?

A) Decreased oxygen content in the blood
B) Flow of oxygen through the device
C) Patient's tidal volume
D) Patient's respiratory rate

Question 20

During laser bronchoscopy,minimal levels of supplemental oxygen should be used to ___________.

A) prevent oxygen toxicity.
B) decrease the risk of bronchospasm.
C) avoid intratracheal ignition.
D) decrease the chance of bacterial contamination.

Question 21

The respiratory care practitioner receives an order for a simple oxygen mask at 3 LPM.How should the practitioner proceed?

A) Set up the simple mask as ordered and return to check on the patient in 10 minutes
B) Call the physician to clarify the order and explain the flowrate would allow the patient's CO₂ to build-up in the mask
C) Set up a nasal cannula at 3 LPM instead of the original order
D) Assess the patient's oxygenation before setting up the oxygen and determine if that much oxygen is needed

Question 22

A patient has an oxygen saturation of 95% on room air.The patient's vital signs reveal a heart rate of 120/minute with occasional PVCs,a respiratory rate of 38/minute,and mild cyanosis of the patient's mucous membranes.What should be done?

Question 23

A respiratory care practitioner sets up an oxygen device on a patient.How should the practitioner document the oxygen?

A) The flowrate or FI02
B) The oxygen device
C) Date and time of set-up
D) All of these

Question 24

Which type of oxygen analyzer uses an oxidation-reduction reaction to measure the FO₂ of an oxygen sample?

A) Galvanic oxygen analyzer
B) Polarographic oxygen analyzer
C) Electrical oxygen analyzer
D) a and b

Question 25

Which of the following statements is TRUE regarding the use of an oxygen analyzer?

A) The oxygen analyzer should be calibrated once a day.
B) The FIO₂ should be measured as close to the patient as possible.
C) It is not necessary to analyze the FIO₂ delivered to the patient.
D) Oxygen concentrations should be measured and documented in the patient's chart at least once each day.

Question 26

During oxygen rounds,a patient on a nasal cannula has an oxygen saturation of 89%.No flow is felt coming from the device.What could be the problem?

Question 27

A patient has been on a non-rebreathing mask for 36 hours.What signs should the practitioner watch for and why?

Question 28

Children receiving oxygen via an enclosure are at risk for a fire hazard if which of the following is used in the enclosure?
I.Battery-powered electric toys
II.Radio
III.Electrically powered appliances

A) I, II, III
B) I only
C) II and III
D) I and III

Question 29

A newborn is admitted into the nursery and is started on an FIO₂ of 35% through an isolette.The patient's arterial blood gas is drawn and his PaO₂ measured to be 88 mmHg.What would be the associated risk for this patient?

A) Oxygen toxicity
B) Absorption atelectasis
C) Oxygen induced hypoventilation
D) Retinopathy of prematurity

Question 30

Before analysis of oxygen percentage,the analyzer should be calibrated to which percentage?

A) 21%
B) 50%
C) 100%
D) a and c

Question 31

The oxygen percentage being delivered to a newborn by way of an oxygen hood needs to be analyzed.Where should the oxygen within the hood be analyzed?

A) At the oxygen source outlet
B) Any place where the analyzer probe can be placed
C) As close to the patient's airway as possible
D) At the highest point of the oxygen hood

Question 32

The practitioner notes that a patient has been on a partial rebreathing mask for 4 days.The chest x-ray indicates bilateral atelectasis in both bases.What would be the most likely reason for this finding?

A) Oxygen tolerance
B) Absorption atelectasis
C) Oxygen induced hypoventilation
D) Retinopathy of prematurity

Question 33

Which one of the following side effects of oxygen therapy should be watched for in a COPD patient with hypercapnia?

A) Oxygen toxicity
B) Absorption atelectasis
C) Oxygen induced hypoventilation
D) Retinopathy of prematurity