Question 1

Properly applied O2 therapy can decrease which of the following?
1) Ventilatory demand
2) Work of breathing
3) Cardiac output

Accepted Answer

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

Question 2

To confirm proper operation of an O2 blending system, what should you do?
1) Test low-pressure alarms and bypass systems.
2) Analyze FiO2 at 0.21, 1.00, and prescribed level.
3) Confirm air and O2 inlet pressures.

Accepted Answer

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

Question 3

Which of the following factors will decrease the FiO2 delivered by a low-flow O2 system?
1) Short inspiratory time
2) Fast rate of breathing
3) Lower O2 input
4) Large minute ventilation

Accepted Answer

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

Question 4

An infant requires both a precise high FiO2 and maintenance of a neutral thermal environment. Which of the following systems can best achieve these goals?
1) Oxy-Hood or warmed O2 blending system without incubator
2) Heated incubator with automatic O2 controlling system
3) Heated incubator with Oxy-Hood or O2 blending system

Accepted Answer

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

Question 5

What is the level of SpO2 typically associated with discontinuation of O2 therapy?

Accepted Answer

A)  88% 
B)  90% 
C)  92% 
D)  94% 
A)  88% 
B)  90% 
C)  92% 
D)  94%

Question 6

Before administering a helium-O2 mixture to a patient with large airway obstruction, what should you do?

Accepted Answer

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. 
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.

Question 7

A physician places a patient in respiratory failure on 100% O2. To avoid the hazards of O2 toxicity, you would recommend that every effort is made to reduce this FiO2 to less than 50% within what timeframe?

Accepted Answer

A)  8 hr 
B)  24 hr 
C)  48 hr 
D)  5 days 
A)  8 hr 
B)  24 hr 
C)  48 hr 
D)  5 days

Question 8

Which of the following is false about the simple O2 mask?

Accepted Answer

A)  It has no valving system or reservoir bag. 
B)  It can easily deliver high FiO2 values (>0.6 to 0.7). 
C)  It requires a minimal input flow of 5 L/min. 
D)  It generally functions as a variable-performance system. 
A)  It has no valving system or reservoir bag. 
B)  It can easily deliver high FiO2 values (>0.6 to 0.7). 
C)  It requires a minimal input flow of 5 L/min. 
D)  It generally functions as a variable-performance system.

Question 9

You must deliver the highest possible FiO2 to a 67-year-old man with pulmonary edema breathing at a rate of 35/min. Which of the following O2 delivery systems would be most appropriate?

Accepted Answer

A)  Nonrebreathing mask at 12 to 15 L/min 
B)  Simple mask at 12 to 15 L/min 
C)  Partial rebreathing mask at 12 to 15 L/min 
D)  Aerosol mask with nebulizer set to 100% 
A)  Nonrebreathing mask at 12 to 15 L/min 
B)  Simple mask at 12 to 15 L/min 
C)  Partial rebreathing mask at 12 to 15 L/min 
D)  Aerosol mask with nebulizer set to 100%

Question 10

When determining a need for O2 therapy, the respiratory therapist should assess which of the following?
1) Neurologic status
2) Pulmonary status
3) Cardiac status

Accepted Answer

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

Question 11

At an FiO2 of 1, what is the approximate half-life of blood carboxyhemoglobin?

Accepted Answer

A)  20 min 
B)  80 min 
C)  3 hr 
D)  5 hr 
A)  20 min 
B)  80 min 
C)  3 hr 
D)  5 hr

Question 12

Which of the following typically occurs first when monitoring the earliest physiologic response to breathing 100% O2?

Accepted Answer

A)  Substernal chest pain 
B)  Decreased using capacity (DLCO) 
C)  Decreased lung compliance (CL) 
D)  Decreased vital capacity (V
C)  
A)  Substernal chest pain 
B)  Decreased using capacity (DLCO) 
C)  Decreased lung compliance (CL) 
D)  Decreased vital capacity (V
C)

Question 13

Which of the following are true about absorption atelectasis?
1) It can occur only when breathing supplemental O2.
2) Its risk is increased in patients breathing at low tidal volumes (VT values).
3) Its risk is decreased through the natural "sigh" mechanism.
4) It results in an increase in the physiologic shunt fraction.

Accepted Answer

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

Question 14

Which of the following are components of a typical O2 blender?
1) Precision metering device or mixture control
2) Audible dual low-pressure alarm system
3) Pressure regulating and equalizing valves
4) Variable-size air-entrainment port

Accepted Answer

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

Question 15

To prevent an adverse rebound effect when withdrawing NO therapy, what should you do?
1) Reduce the NO to the lowest effective dose (ideally, less than 5 ppm).
2) Hyperoxygenate the patient just before discontinuing NO.
3) Ensure that the patient is hemodynamically stable.

Accepted Answer

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

Question 16

According to AARC clinical practice guidelines, what is the minimum frequency for checking the functioning of an O2 delivery system?

Accepted Answer

A)  Every 4 hr 
B)  Every 8 hr 
C)  Every 24 hr 
D)  Every 48 hr 
A)  Every 4 hr 
B)  Every 8 hr 
C)  Every 24 hr 
D)  Every 48 hr

Question 17

Criteria for initiating hyperbaric oxygen (HBO) therapy on an adult patient suspected of suffering from acute carbon monoxide poisoning include which of the following?
1) History of unconsciousness
2) Carboxyhemoglobin saturation less than 20%
3) Presence of neurologic abnormality
4) Presence of cardiac instability

Accepted Answer

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

Question 18

Which of the following is an indication for the use of helium-O2 mixtures?

Accepted Answer

A)  Large-airway obstruction 
B)  Small-airway obstruction 
C)  Restrictive diseases 
D)  Physiologic shunting 
A)  Large-airway obstruction 
B)  Small-airway obstruction 
C)  Restrictive diseases 
D)  Physiologic shunting

Question 19

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.

Accepted Answer

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

Question 20

Primary safety concerns in the application of hyperbaric oxygenation include which of the following?
1) Sudden decompression
2) Electrical fires
3) CO2 accumulation

Accepted Answer

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

Exam 41: Medical Gas Therapy

Properly applied O2 therapy can decrease which of the following? 1) Ventilatory demand 2) Work of breathing 3) Cardiac output

To confirm proper operation of an O2 blending system, what should you do? 1) Test low-pressure alarms and bypass systems. 2) Analyze FiO2 at 0.21, 1.00, and prescribed level. 3) Confirm air and O2 inlet pressures.

Which of the following factors will decrease the FiO2 delivered by a low-flow O2 system? 1) Short inspiratory time 2) Fast rate of breathing 3) Lower O2 input 4) Large minute ventilation

What is the level of SpO2 typically associated with discontinuation of O2 therapy?

Before administering a helium-O2 mixture to a patient with large airway obstruction, what should you do?

A physician places a patient in respiratory failure on 100% O2. To avoid the hazards of O2 toxicity, you would recommend that every effort is made to reduce this FiO2 to less than 50% within what timeframe?

Which of the following is false about the simple O2 mask?

You must deliver the highest possible FiO2 to a 67-year-old man with pulmonary edema breathing at a rate of 35/min. Which of the following O2 delivery systems would be most appropriate?

When determining a need for O2 therapy, the respiratory therapist should assess which of the following? 1) Neurologic status 2) Pulmonary status 3) Cardiac status

At an FiO2 of 1, what is the approximate half-life of blood carboxyhemoglobin?

Which of the following typically occurs first when monitoring the earliest physiologic response to breathing 100% O2?

Which of the following are components of a typical O2 blender? 1) Precision metering device or mixture control 2) Audible dual low-pressure alarm system 3) Pressure regulating and equalizing valves 4) Variable-size air-entrainment port

To prevent an adverse rebound effect when withdrawing NO therapy, what should you do? 1) Reduce the NO to the lowest effective dose (ideally, less than 5 ppm). 2) Hyperoxygenate the patient just before discontinuing NO. 3) Ensure that the patient is hemodynamically stable.

According to AARC clinical practice guidelines, what is the minimum frequency for checking the functioning of an O2 delivery system?

Which of the following is an indication for the use of helium-O2 mixtures?

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.

Primary safety concerns in the application of hyperbaric oxygenation include which of the following? 1) Sudden decompression 2) Electrical fires 3) CO2 accumulation

History of Respiratory Care

Delivering Evidence-Based Respiratory Care

Quality, Patient Safety, and Communication, and Recordkeeping

Principles of Infection Prevention and Control

Ethical and Legal Implications of Practice

Physical Principles of Respiratory Care

E-Medicine in Respiratory Care

Fundamentals of Respiratory Care Research

The Respiratory System

The Cardiovascular System

Ventilation

Gas Exchange and Transport

Solutions, Body Fluids, and Electrolytes

Acid-Base Balance

Regulation of Breathing

Bedside Assessment of the Patient

Interpreting Clinical and Laboratory Data

Interpreting the Electrocardiogram

Analysis and Monitoring of Gas Exchange

Pulmonary Function Testing

Review of Thoracic Imaging

Flexible Bronchoscopy and the Respiratory Therapist

Nutrition Assessment

Pulmonary Infections

Obstructive Lung Disease: Chronic Obstructive Pulmonary Disease Copd, Asthma, and Related Diseases

Interstitial Lung Disease

Pleural Diseases

Pulmonary Vascular Disease

Acute Respiratory Distress Syndrome

Trauma, Burns and Near Drowning

Lung Cancer

Neuromuscular and Other Diseases of the Chest Wall

Disorders of Sleep

Neonatal and Pediatric Respiratory Disorders

Airway Pharmacology

Airway Management

Emergency Cardiovascular Life Support

Humidity and Bland Aerosol Therapy

Aerosol Drug Therapy

Storage and Delivery of Medical Gases

Lung Expansion Therapy

Airway Clearance Therapy Act

Respiratory Failure and the Need for Ventilatory Support

Mechanical Ventilators

Physiology of Ventilatory Support

Patient Ventilator Interaction

Initiating and Adjusting Invasive Ventilatory Support

Noninvasive Ventilation

Extracorporeal Life Support Ecls

Monitoring the Patient in the Intensive Care Unit

Discontinuing Ventilatory Support

Neonatal and Pediatric Respiratory Care

Patient Education and Health Promotion

Cardiopulmonary Rehabilitation

Respiratory Care in Alternative Settings

Filters

Properly applied O₂ therapy can decrease which of the following? 1) Ventilatory demand 2) Work of breathing 3) Cardiac output

To confirm proper operation of an O₂ blending system, what should you do? 1) Test low-pressure alarms and bypass systems. 2) Analyze FiO₂ at 0.21, 1.00, and prescribed level. 3) Confirm air and O₂ inlet pressures.

Which of the following factors will decrease the FiO₂ delivered by a low-flow O₂ system? 1) Short inspiratory time 2) Fast rate of breathing 3) Lower O₂ input 4) Large minute ventilation

What is the level of SpO₂ typically associated with discontinuation of O₂ therapy?

Before administering a helium-O₂ mixture to a patient with large airway obstruction, what should you do?

A physician places a patient in respiratory failure on 100% O₂. To avoid the hazards of O₂ toxicity, you would recommend that every effort is made to reduce this FiO₂to less than 50% within what timeframe?

Which of the following is false about the simple O₂ mask?

You must deliver the highest possible FiO₂ to a 67-year-old man with pulmonary edema breathing at a rate of 35/min. Which of the following O₂ delivery systems would be most appropriate?

When determining a need for O₂ therapy, the respiratory therapist should assess which of the following? 1) Neurologic status 2) Pulmonary status 3) Cardiac status

At an FiO₂ of 1, what is the approximate half-life of blood carboxyhemoglobin?

Which of the following typically occurs first when monitoring the earliest physiologic response to breathing 100% O₂?

Which of the following are components of a typical O₂ blender? 1) Precision metering device or mixture control 2) Audible dual low-pressure alarm system 3) Pressure regulating and equalizing valves 4) Variable-size air-entrainment port

According to AARC clinical practice guidelines, what is the minimum frequency for checking the functioning of an O₂ delivery system?

Which of the following is an indication for the use of helium-O₂mixtures?

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.

Primary safety concerns in the application of hyperbaric oxygenation include which of the following? 1) Sudden decompression 2) Electrical fires 3) CO₂ accumulation