ATI Gas Exchange Proctored Exam Review
70 NGN-Integrated Practice Questions with Correct Answers and Rationales | 2026/2027
Aligned with Elsevier ATI Content Mastery Series®, NCSBN CJMM, GOLD COPD Guidelines, NAEPP Asthma
Guidelines, and NCLEX-RN Physiological Integrity Domain
, ATI Gas Exchange Proctored Exam Review
Abstract
This review document provides 70 Next-Generation NCLEX (NGN)–integrated practice questions
designed to prepare pre-licensure nursing students for the ATI Gas Exchange Content Mastery Series
(CMS) proctored examination. The questions are organized across six clinically grounded domains:
respiratory physiology and gas exchange principles, respiratory assessment and diagnostic interpretation,
oxygen delivery and airway management, common respiratory pathologies and clinical management,
respiratory pharmacology and patient education, and prioritization, safety, and NGN clinical judgment.
Each question includes four answer options, a bold cyan–highlighted correct answer, and an evidence-
based rationale referencing the ATI CMS blueprint, NCSBN Clinical Judgment Measurement Model
(CJMM), GOLD COPD Guidelines, NAEPP Asthma Guidelines, ARDSNet/SCCM protocols, AHA/ACC
Pulmonary Embolism Guidelines, and current best practices. The document is intended as a self-study and
peer-review resource to reinforce clinical reasoning, oxygenation concepts, and respiratory nursing
competencies required for NCLEX-RN readiness and safe patient care.
Keywords: ATI gas exchange, respiratory nursing, oxygenation, ABG interpretation, airway management,
NGN clinical judgment, COPD, asthma, pulmonary embolism
Domain Distribution Table
Domain Focus Area Questions Approx. Weight
1: Respiratory Physiology & Gas V/Q matching, O2 transport, diffusion Q1–12 17%
Exchange Principles curve, surfactant
2: Respiratory Assessment & Physical exam, ABG (ROME), pulse Q13–26 20%
Diagnostic Interpretation oximetry, chest X-ray/CT
3: Oxygen Delivery & Airway O2 devices, suctioning, incentive Q27–38 16%
Management spirometry, positioning
4: Common Respiratory COPD, asthma, pneumonia, PE, ARDS Q39–54 23%
Pathologies & Clinical
Management
5: Respiratory Pharmacology & Bronchodilators, steroids, mucolytics, Q55–64 14%
Patient Education inhaler technique
6: Prioritization, Safety & NGN ABCs framework, NGN items, cue Q65–70 9%
Clinical Judgment clustering, escalation
Domain 1: Respiratory Physiology & Gas Exchange Principles (Q1–Q12)
1. A nurse is reviewing ventilation-perfusion (V/Q) matching with a nursing student. Which statement by the
student indicates an accurate understanding of V/Q mismatch?
A. A V/Q ratio greater than 1 indicates a shunt, where blood bypasses ventilated alveoli
B. A V/Q ratio less than 1 indicates dead space, where alveoli are ventilated but not perfused
C. In a V/Q mismatch, perfusion exceeds ventilation, causing intrapulmonary shunting and hypoxemia
D. The normal V/Q ratio is approximately 0.5, reflecting balanced ventilation and perfusion
Correct Answer: C. In a V/Q mismatch, perfusion exceeds ventilation, causing intrapulmonary shunting
and hypoxemia
2
, ATI Gas Exchange Proctored Exam Review
Per the ATI CMS Gas Exchange module, V/Q mismatch occurs when perfusion exceeds ventilation (shunt effect) or
ventilation exceeds perfusion (dead space effect). The normal V/Q ratio is approximately 0.8. Shunts cause hypoxemia
that is poorly responsive to supplemental oxygen, a key concept for NCSBN CJMM Recognize Cues competency.
2. A patient with severe pneumonia develops increasing hypoxemia despite receiving 100% FiO2. The nurse
recognizes this finding is most consistent with which physiologic mechanism?
A. Diffusion limitation across a thickened alveolar-capillary membrane
B. Intrapulmonary shunting due to alveolar consolidation
C. Hypoventilation secondary to respiratory muscle fatigue
D. Right-to-left cardiac shunt through a patent foramen ovale
Correct Answer: B. Intrapulmonary shunting due to alveolar consolidation
ATI emphasizes that refractory hypoxemia unresponsive to high FiO2 indicates true shunting, where blood passes
through non-ventilated alveoli without gas exchange. This aligns with NCSBN CJMM Analyze Cues: recognizing that
consolidation-filled alveoli prevent O2 diffusion regardless of inspired concentration, consistent with ARDS and
severe pneumonia pathophysiology.
3. A nurse is interpreting a patient's oxygen-hemoglobin dissociation curve. Which condition would cause a
rightward shift of the curve, facilitating oxygen unloading at the tissue level?
A. Alkalosis, hypothermia, and decreased 2,3-DPG levels
B. Acidosis, hyperthermia, and increased 2,3-DPG levels
C. Alkalosis, hyperthermia, and increased carbon monoxide levels
D. Acidosis, hypothermia, and decreased 2,3-DPG levels
Correct Answer: B. Acidosis, hyperthermia, and increased 2,3-DPG levels
The ATI Gas Exchange review identifies acidosis, hyperthermia, hypercapnia, and increased 2,3-DPG as factors that
shift the O2-Hb dissociation curve to the right (Bohr effect), decreasing hemoglobin affinity and enhancing O2
delivery to tissues. This is essential NCLEX-RN Physiological Integrity knowledge for assessing tissue oxygenation
adequacy.
4. A nurse is caring for a patient with carbon monoxide (CO) poisoning. Which explanation best describes why
the patient is hypoxic despite a normal PaO2 on arterial blood gas (ABG) analysis?
A. CO directly stimulates the carotid bodies, causing reflex hypoventilation
B. CO binds to hemoglobin with an affinity 200–250 times greater than oxygen, reducing oxygen-carrying
capacity
C. CO causes pulmonary vasoconstriction, increasing physiologic dead space
D. CO displaces bicarbonate from hemoglobin, causing metabolic acidosis
Correct Answer: B. CO binds to hemoglobin with an affinity 200–250 times greater than oxygen, reducing
oxygen-carrying capacity
Per ATI and AHA guidelines, carboxyhemoglobin has 200–250 times greater affinity for CO than O2, reducing the
oxygen-carrying capacity of blood while leaving PaO2 unaffected (functional hypoxemia). Pulse oximetry is
unreliable in CO poisoning because it cannot distinguish oxyhemoglobin from carboxyhemoglobin, requiring co-
oximetry for accurate assessment.
3
70 NGN-Integrated Practice Questions with Correct Answers and Rationales | 2026/2027
Aligned with Elsevier ATI Content Mastery Series®, NCSBN CJMM, GOLD COPD Guidelines, NAEPP Asthma
Guidelines, and NCLEX-RN Physiological Integrity Domain
, ATI Gas Exchange Proctored Exam Review
Abstract
This review document provides 70 Next-Generation NCLEX (NGN)–integrated practice questions
designed to prepare pre-licensure nursing students for the ATI Gas Exchange Content Mastery Series
(CMS) proctored examination. The questions are organized across six clinically grounded domains:
respiratory physiology and gas exchange principles, respiratory assessment and diagnostic interpretation,
oxygen delivery and airway management, common respiratory pathologies and clinical management,
respiratory pharmacology and patient education, and prioritization, safety, and NGN clinical judgment.
Each question includes four answer options, a bold cyan–highlighted correct answer, and an evidence-
based rationale referencing the ATI CMS blueprint, NCSBN Clinical Judgment Measurement Model
(CJMM), GOLD COPD Guidelines, NAEPP Asthma Guidelines, ARDSNet/SCCM protocols, AHA/ACC
Pulmonary Embolism Guidelines, and current best practices. The document is intended as a self-study and
peer-review resource to reinforce clinical reasoning, oxygenation concepts, and respiratory nursing
competencies required for NCLEX-RN readiness and safe patient care.
Keywords: ATI gas exchange, respiratory nursing, oxygenation, ABG interpretation, airway management,
NGN clinical judgment, COPD, asthma, pulmonary embolism
Domain Distribution Table
Domain Focus Area Questions Approx. Weight
1: Respiratory Physiology & Gas V/Q matching, O2 transport, diffusion Q1–12 17%
Exchange Principles curve, surfactant
2: Respiratory Assessment & Physical exam, ABG (ROME), pulse Q13–26 20%
Diagnostic Interpretation oximetry, chest X-ray/CT
3: Oxygen Delivery & Airway O2 devices, suctioning, incentive Q27–38 16%
Management spirometry, positioning
4: Common Respiratory COPD, asthma, pneumonia, PE, ARDS Q39–54 23%
Pathologies & Clinical
Management
5: Respiratory Pharmacology & Bronchodilators, steroids, mucolytics, Q55–64 14%
Patient Education inhaler technique
6: Prioritization, Safety & NGN ABCs framework, NGN items, cue Q65–70 9%
Clinical Judgment clustering, escalation
Domain 1: Respiratory Physiology & Gas Exchange Principles (Q1–Q12)
1. A nurse is reviewing ventilation-perfusion (V/Q) matching with a nursing student. Which statement by the
student indicates an accurate understanding of V/Q mismatch?
A. A V/Q ratio greater than 1 indicates a shunt, where blood bypasses ventilated alveoli
B. A V/Q ratio less than 1 indicates dead space, where alveoli are ventilated but not perfused
C. In a V/Q mismatch, perfusion exceeds ventilation, causing intrapulmonary shunting and hypoxemia
D. The normal V/Q ratio is approximately 0.5, reflecting balanced ventilation and perfusion
Correct Answer: C. In a V/Q mismatch, perfusion exceeds ventilation, causing intrapulmonary shunting
and hypoxemia
2
, ATI Gas Exchange Proctored Exam Review
Per the ATI CMS Gas Exchange module, V/Q mismatch occurs when perfusion exceeds ventilation (shunt effect) or
ventilation exceeds perfusion (dead space effect). The normal V/Q ratio is approximately 0.8. Shunts cause hypoxemia
that is poorly responsive to supplemental oxygen, a key concept for NCSBN CJMM Recognize Cues competency.
2. A patient with severe pneumonia develops increasing hypoxemia despite receiving 100% FiO2. The nurse
recognizes this finding is most consistent with which physiologic mechanism?
A. Diffusion limitation across a thickened alveolar-capillary membrane
B. Intrapulmonary shunting due to alveolar consolidation
C. Hypoventilation secondary to respiratory muscle fatigue
D. Right-to-left cardiac shunt through a patent foramen ovale
Correct Answer: B. Intrapulmonary shunting due to alveolar consolidation
ATI emphasizes that refractory hypoxemia unresponsive to high FiO2 indicates true shunting, where blood passes
through non-ventilated alveoli without gas exchange. This aligns with NCSBN CJMM Analyze Cues: recognizing that
consolidation-filled alveoli prevent O2 diffusion regardless of inspired concentration, consistent with ARDS and
severe pneumonia pathophysiology.
3. A nurse is interpreting a patient's oxygen-hemoglobin dissociation curve. Which condition would cause a
rightward shift of the curve, facilitating oxygen unloading at the tissue level?
A. Alkalosis, hypothermia, and decreased 2,3-DPG levels
B. Acidosis, hyperthermia, and increased 2,3-DPG levels
C. Alkalosis, hyperthermia, and increased carbon monoxide levels
D. Acidosis, hypothermia, and decreased 2,3-DPG levels
Correct Answer: B. Acidosis, hyperthermia, and increased 2,3-DPG levels
The ATI Gas Exchange review identifies acidosis, hyperthermia, hypercapnia, and increased 2,3-DPG as factors that
shift the O2-Hb dissociation curve to the right (Bohr effect), decreasing hemoglobin affinity and enhancing O2
delivery to tissues. This is essential NCLEX-RN Physiological Integrity knowledge for assessing tissue oxygenation
adequacy.
4. A nurse is caring for a patient with carbon monoxide (CO) poisoning. Which explanation best describes why
the patient is hypoxic despite a normal PaO2 on arterial blood gas (ABG) analysis?
A. CO directly stimulates the carotid bodies, causing reflex hypoventilation
B. CO binds to hemoglobin with an affinity 200–250 times greater than oxygen, reducing oxygen-carrying
capacity
C. CO causes pulmonary vasoconstriction, increasing physiologic dead space
D. CO displaces bicarbonate from hemoglobin, causing metabolic acidosis
Correct Answer: B. CO binds to hemoglobin with an affinity 200–250 times greater than oxygen, reducing
oxygen-carrying capacity
Per ATI and AHA guidelines, carboxyhemoglobin has 200–250 times greater affinity for CO than O2, reducing the
oxygen-carrying capacity of blood while leaving PaO2 unaffected (functional hypoxemia). Pulse oximetry is
unreliable in CO poisoning because it cannot distinguish oxyhemoglobin from carboxyhemoglobin, requiring co-
oximetry for accurate assessment.
3
