Air Methods Critical Care Exam (Actual
2025/2026) – 199 Questions and Verified
Answers
SECTION 1: AIRWAY MANAGEMENT & RESPIRATORY CARE (Questions 1-
25)
Q1. What is the most reliable method of confirming and monitoring
correct placement of an endotracheal (ET) tube?
• A. Auscultation of bilateral breath sounds
• B. Chest X-ray
• C. Continuous waveform capnography
• D. Presence of condensation in the tube
Correct ,,,answer,,,: C. Continuous waveform capnography
Rationale: Continuous waveform capnography is the gold standard for
confirming ET tube placement and providing ongoing monitoring. Unlike
colorimetric devices, waveform capnography provides a continuous
visual display of CO2 detection, which instantly indicates displacement or
obstruction. Auscultation and X-rays are secondary or confirmatory
methods but may be misleading.
Q2. The upper airway consists of:
• A. Trachea, bronchi, and alveoli
• B. Nose, Mouth, Jaw, Oral Cavity, Pharynx, and Larynx
• C. Alveoli only
, • D. Terminal bronchioles
Correct ,,,answer,,,: B. Nose, Mouth, Jaw, Oral Cavity, Pharynx, and
Larynx
Rationale: The upper airway includes all structures from the nose and
mouth down to the larynx. Gas exchange does not occur here—this area is
for conducting air to the lower airway. The lower airway begins at the
trachea.
Q3. No gas exchange occurs in the conducting airways from the nose to
the terminal bronchioles. This area is called:
• A. Anatomical dead space
• B. Alveolar dead space
• C. Physiological dead space
• D. Shunt space
Correct ,,,answer,,,: A. Anatomical dead space
Rationale: Anatomical dead space is the volume of the conducting
airways where no gas exchange occurs, approximately 2 mL/kg of ideal
body weight. This air is moved in and out but does not participate in
oxygenation.
Q4. Describe the cricothyroid membrane and its clinical significance.
• A. A large artery between the thyroid and cricoid; site for emergency
tracheostomy
• B. An avascular structure between the thyroid and cricoid cartilages;
site for emergency cricothyrotomy
• C. A nerve bundle that controls vocal cord movement
• D. A ligament that attaches the trachea to the sternum
,Correct ,,,answer,,,: B. An avascular structure between the thyroid and
cricoid cartilages; site for emergency cricothyrotomy
Rationale: The cricothyroid membrane is palpable in the midline of the
neck, just below the thyroid cartilage. Its avascular nature makes it the
preferred site for an emergency surgical airway (cricothyrotomy) when a
patient cannot be intubated or ventilated by other means.
Q5. A patient presents with tracheal deviation AWAY from the affected
side, decreased breath sounds, and hyperresonance to percussion.
What is the most likely diagnosis?
• A. Simple pneumothorax
• B. Tension pneumothorax
• C. Hemothorax
• D. Cardiac tamponade
Correct ,,,answer,,,: B. Tension pneumothorax
Rationale: Tension pneumothorax occurs when air accumulates in the
pleural space under pressure, pushing the mediastinum to the opposite
side. This causes tracheal deviation away from the affected side, along
with absent breath sounds, hyperresonance, hypotension, and distended
neck veins. It is a life-threatening emergency requiring immediate needle
decompression.
Q6. A PaCO2 greater than 45 mmHg indicates:
• A. Metabolic acidosis
• B. Metabolic alkalosis
• C. Respiratory acidosis
• D. Respiratory alkalosis
Correct ,,,answer,,,: C. Respiratory acidosis
, Rationale: Normal PaCO2 is 35-45 mmHg. A value above 45 indicates
hypoventilation and retention of carbon dioxide, causing respiratory
acidosis. This can be caused by conditions like COPD exacerbation,
opioid overdose, or neuromuscular weakness.
Q7. What is the normal range for PaCO2?
• A. 20-30 mmHg
• B. 35-45 mmHg
• C. 50-60 mmHg
• D. 80-100 mmHg
Correct ,,,answer,,,: B. 35-45 mmHg
Rationale: The normal partial pressure of carbon dioxide in arterial blood
is 35-45 mmHg. Values below 35 indicate hyperventilation and respiratory
alkalosis; values above 45 indicate hypoventilation and respiratory
acidosis.
Q8. Which gas law is most relevant to the expansion of a pneumothorax
as a flight crew ascends to altitude?
• A. Henry's Law
• B. Boyle's Law
• C. Charles's Law
• D. Graham's Law
Correct ,,,answer,,,: B. Boyle's Law
Rationale: Boyle's Law states that the volume of a gas is inversely
proportional to the surrounding pressure (P₁V₁ = P₂V₂). As altitude
increases and atmospheric pressure decreases, trapped air in a
pneumothorax expands. This is critical in air medical transport because
2025/2026) – 199 Questions and Verified
Answers
SECTION 1: AIRWAY MANAGEMENT & RESPIRATORY CARE (Questions 1-
25)
Q1. What is the most reliable method of confirming and monitoring
correct placement of an endotracheal (ET) tube?
• A. Auscultation of bilateral breath sounds
• B. Chest X-ray
• C. Continuous waveform capnography
• D. Presence of condensation in the tube
Correct ,,,answer,,,: C. Continuous waveform capnography
Rationale: Continuous waveform capnography is the gold standard for
confirming ET tube placement and providing ongoing monitoring. Unlike
colorimetric devices, waveform capnography provides a continuous
visual display of CO2 detection, which instantly indicates displacement or
obstruction. Auscultation and X-rays are secondary or confirmatory
methods but may be misleading.
Q2. The upper airway consists of:
• A. Trachea, bronchi, and alveoli
• B. Nose, Mouth, Jaw, Oral Cavity, Pharynx, and Larynx
• C. Alveoli only
, • D. Terminal bronchioles
Correct ,,,answer,,,: B. Nose, Mouth, Jaw, Oral Cavity, Pharynx, and
Larynx
Rationale: The upper airway includes all structures from the nose and
mouth down to the larynx. Gas exchange does not occur here—this area is
for conducting air to the lower airway. The lower airway begins at the
trachea.
Q3. No gas exchange occurs in the conducting airways from the nose to
the terminal bronchioles. This area is called:
• A. Anatomical dead space
• B. Alveolar dead space
• C. Physiological dead space
• D. Shunt space
Correct ,,,answer,,,: A. Anatomical dead space
Rationale: Anatomical dead space is the volume of the conducting
airways where no gas exchange occurs, approximately 2 mL/kg of ideal
body weight. This air is moved in and out but does not participate in
oxygenation.
Q4. Describe the cricothyroid membrane and its clinical significance.
• A. A large artery between the thyroid and cricoid; site for emergency
tracheostomy
• B. An avascular structure between the thyroid and cricoid cartilages;
site for emergency cricothyrotomy
• C. A nerve bundle that controls vocal cord movement
• D. A ligament that attaches the trachea to the sternum
,Correct ,,,answer,,,: B. An avascular structure between the thyroid and
cricoid cartilages; site for emergency cricothyrotomy
Rationale: The cricothyroid membrane is palpable in the midline of the
neck, just below the thyroid cartilage. Its avascular nature makes it the
preferred site for an emergency surgical airway (cricothyrotomy) when a
patient cannot be intubated or ventilated by other means.
Q5. A patient presents with tracheal deviation AWAY from the affected
side, decreased breath sounds, and hyperresonance to percussion.
What is the most likely diagnosis?
• A. Simple pneumothorax
• B. Tension pneumothorax
• C. Hemothorax
• D. Cardiac tamponade
Correct ,,,answer,,,: B. Tension pneumothorax
Rationale: Tension pneumothorax occurs when air accumulates in the
pleural space under pressure, pushing the mediastinum to the opposite
side. This causes tracheal deviation away from the affected side, along
with absent breath sounds, hyperresonance, hypotension, and distended
neck veins. It is a life-threatening emergency requiring immediate needle
decompression.
Q6. A PaCO2 greater than 45 mmHg indicates:
• A. Metabolic acidosis
• B. Metabolic alkalosis
• C. Respiratory acidosis
• D. Respiratory alkalosis
Correct ,,,answer,,,: C. Respiratory acidosis
, Rationale: Normal PaCO2 is 35-45 mmHg. A value above 45 indicates
hypoventilation and retention of carbon dioxide, causing respiratory
acidosis. This can be caused by conditions like COPD exacerbation,
opioid overdose, or neuromuscular weakness.
Q7. What is the normal range for PaCO2?
• A. 20-30 mmHg
• B. 35-45 mmHg
• C. 50-60 mmHg
• D. 80-100 mmHg
Correct ,,,answer,,,: B. 35-45 mmHg
Rationale: The normal partial pressure of carbon dioxide in arterial blood
is 35-45 mmHg. Values below 35 indicate hyperventilation and respiratory
alkalosis; values above 45 indicate hypoventilation and respiratory
acidosis.
Q8. Which gas law is most relevant to the expansion of a pneumothorax
as a flight crew ascends to altitude?
• A. Henry's Law
• B. Boyle's Law
• C. Charles's Law
• D. Graham's Law
Correct ,,,answer,,,: B. Boyle's Law
Rationale: Boyle's Law states that the volume of a gas is inversely
proportional to the surrounding pressure (P₁V₁ = P₂V₂). As altitude
increases and atmospheric pressure decreases, trapped air in a
pneumothorax expands. This is critical in air medical transport because
