ATI CRITICAL ALTERATIONS IN GAS
EXCHANGE EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
| INSTANT DOWNLOAD PDF
Core Domains
• Respiratory Anatomy and Physiology
• Assessment of Gas Exchange
• Oxygen Delivery Systems and Oxygen Toxicity
• Obstructive Pulmonary Disorders
• Restrictive Pulmonary Disorders
• Pulmonary Vascular Disorders
• Chest Trauma and Pleural Space Disorders
• Respiratory Failure and Mechanical Ventilation
• Arterial Blood Gas Interpretation
• Priority Nursing Interventions and Patient Education
Introduction
The ATI Critical Alterations in Gas Exchange examination evaluates the
nursing student's mastery of respiratory physiology and the management of
patients experiencing significant oxygenation and ventilation deficits. The
assessment covers anatomy and physiology of the respiratory system,
assessment techniques, oxygen delivery devices, obstructive and restrictive
pulmonary disorders, pulmonary vascular conditions, chest trauma, and
respiratory failure. The exam employs multiple-choice and scenario-based
,questions that mirror real-world clinical encounters, emphasizing critical
thinking, priority decision-making, and safe nursing interventions.
Candidates must demonstrate competency in interpreting arterial blood gas
values, identifying clinical manifestations of impaired gas exchange, and
implementing appropriate patient-centered care.
Section One: Questions 1–100
Question 1
Which structure creates the greatest portion of the pressure gradient that
drives inspiration?
A. External intercostal muscles
B. Diaphragm
C. Internal intercostal muscles
D. Scalenes
B. Diaphragm
RATIONALE: Contraction of the diaphragm flattens the dome, increasing
thoracic volume and decreasing intrapleural pressure, which is the primary
driver of inspiration.
Question 2
Surfactant primarily affects which of the following lung properties?
A. Elastic recoil
B. Airway resistance
C. Lung compliance
D. Diffusion capacity
C. Lung compliance
RATIONALE: Surfactant reduces surface tension within alveoli, increasing
lung compliance and making expansion easier. It is required to keep the
alveoli from collapsing and causing atelectasis.
,Question 3
A nurse is collecting data from a client who is receiving oxygen therapy. The
nurse should identify that which finding can indicate oxygen toxicity?
A. Ringing in the ears
B. Bradycardia
C. Hypotension
D. Cyanosis
A. Ringing in the ears
RATIONALE: Oxygen toxicity can cause central nervous system effects
such as ringing in the ears, visual disturbances, and nausea. High
concentrations can cause cellular damage.
Question 4
Which arterial blood gas (ABG) finding indicates hypoxemia?
A. PaO₂ 80 mmHg
B. PaO₂ 65 mmHg
C. PaCO₂ 40 mmHg
D. pH 7.35
B. PaO₂ 65 mmHg
RATIONALE: Normal PaO₂ is 80–100 mmHg; a value below 80 indicates
hypoxemia. PaO₂ values below 60 mmHg indicate significant hypoxemia
requiring intervention.
Question 5
A nurse is collecting data from a client who has COPD. Which finding should
the nurse expect?
A. Decreased lung recoil
B. Increased lung compliance
, C. Clubbing of the fingers
D. All of the above
D. All of the above
RATIONALE: COPD is characterized by decreased lung recoil (increased
compliance), barrel chest, and clubbing of the fingers due to chronic
hypoxemia.
Question 6
What is the vital capacity?
A. The volume of air remaining in the lungs after forceful expiration
B. The maximum volume of air that is expired after a maximum inspiration
C. The volume of air inhaled or exhaled during a normal breath
D. The volume of air in the conducting airways
B. The maximum volume of air that is expired after a maximum
inspiration
RATIONALE: Vital capacity is the maximum amount of air a person can
exhale after taking the deepest possible breath. It is a key measure of
respiratory function.
Question 7
Which process refers to the movement of oxygen and carbon dioxide between
the alveoli and the pulmonary capillaries?
A. Ventilation
B. Diffusion
C. Perfusion
D. Oxygenation
B. Diffusion
EXCHANGE EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
| INSTANT DOWNLOAD PDF
Core Domains
• Respiratory Anatomy and Physiology
• Assessment of Gas Exchange
• Oxygen Delivery Systems and Oxygen Toxicity
• Obstructive Pulmonary Disorders
• Restrictive Pulmonary Disorders
• Pulmonary Vascular Disorders
• Chest Trauma and Pleural Space Disorders
• Respiratory Failure and Mechanical Ventilation
• Arterial Blood Gas Interpretation
• Priority Nursing Interventions and Patient Education
Introduction
The ATI Critical Alterations in Gas Exchange examination evaluates the
nursing student's mastery of respiratory physiology and the management of
patients experiencing significant oxygenation and ventilation deficits. The
assessment covers anatomy and physiology of the respiratory system,
assessment techniques, oxygen delivery devices, obstructive and restrictive
pulmonary disorders, pulmonary vascular conditions, chest trauma, and
respiratory failure. The exam employs multiple-choice and scenario-based
,questions that mirror real-world clinical encounters, emphasizing critical
thinking, priority decision-making, and safe nursing interventions.
Candidates must demonstrate competency in interpreting arterial blood gas
values, identifying clinical manifestations of impaired gas exchange, and
implementing appropriate patient-centered care.
Section One: Questions 1–100
Question 1
Which structure creates the greatest portion of the pressure gradient that
drives inspiration?
A. External intercostal muscles
B. Diaphragm
C. Internal intercostal muscles
D. Scalenes
B. Diaphragm
RATIONALE: Contraction of the diaphragm flattens the dome, increasing
thoracic volume and decreasing intrapleural pressure, which is the primary
driver of inspiration.
Question 2
Surfactant primarily affects which of the following lung properties?
A. Elastic recoil
B. Airway resistance
C. Lung compliance
D. Diffusion capacity
C. Lung compliance
RATIONALE: Surfactant reduces surface tension within alveoli, increasing
lung compliance and making expansion easier. It is required to keep the
alveoli from collapsing and causing atelectasis.
,Question 3
A nurse is collecting data from a client who is receiving oxygen therapy. The
nurse should identify that which finding can indicate oxygen toxicity?
A. Ringing in the ears
B. Bradycardia
C. Hypotension
D. Cyanosis
A. Ringing in the ears
RATIONALE: Oxygen toxicity can cause central nervous system effects
such as ringing in the ears, visual disturbances, and nausea. High
concentrations can cause cellular damage.
Question 4
Which arterial blood gas (ABG) finding indicates hypoxemia?
A. PaO₂ 80 mmHg
B. PaO₂ 65 mmHg
C. PaCO₂ 40 mmHg
D. pH 7.35
B. PaO₂ 65 mmHg
RATIONALE: Normal PaO₂ is 80–100 mmHg; a value below 80 indicates
hypoxemia. PaO₂ values below 60 mmHg indicate significant hypoxemia
requiring intervention.
Question 5
A nurse is collecting data from a client who has COPD. Which finding should
the nurse expect?
A. Decreased lung recoil
B. Increased lung compliance
, C. Clubbing of the fingers
D. All of the above
D. All of the above
RATIONALE: COPD is characterized by decreased lung recoil (increased
compliance), barrel chest, and clubbing of the fingers due to chronic
hypoxemia.
Question 6
What is the vital capacity?
A. The volume of air remaining in the lungs after forceful expiration
B. The maximum volume of air that is expired after a maximum inspiration
C. The volume of air inhaled or exhaled during a normal breath
D. The volume of air in the conducting airways
B. The maximum volume of air that is expired after a maximum
inspiration
RATIONALE: Vital capacity is the maximum amount of air a person can
exhale after taking the deepest possible breath. It is a key measure of
respiratory function.
Question 7
Which process refers to the movement of oxygen and carbon dioxide between
the alveoli and the pulmonary capillaries?
A. Ventilation
B. Diffusion
C. Perfusion
D. Oxygenation
B. Diffusion
