AIR METHODS CRITICAL CARE EXAM ACTUAL 2026 EDITION – 300
VERIFIED QUESTIONS |FLIGHT PARAMEDIC & CRITICAL CARE
TRANSPORT ASSESSMENT WITH DETAILED CLINICAL RATIONALES
LATEST UPDATE
SECTION 1: FLIGHT PHYSIOLOGY & GAS LAWS (Q1-30)
QUESTION 1:
Boyle's Law states that the volume of a gas is inversely proportional to
pressure. Which clinical scenario is MOST directly explained by this law during
an air medical transport ascent?
A) Decreased partial pressure of inspired oxygen leading to hypoxia
B) Expansion of a pneumothorax or trapped intestinal gas
C) Decreased solubility of nitrogen in the bloodstream
D) Increased humidity in the ventilator circuit
CORRECT ANSWER: B
RATIONALE: Boyle's Law (P₁V₁ = P₂V₂) explains how gases expand as ambient
pressure decreases during ascent. As the aircraft climbs, trapped gas in a
pneumothorax, intestinal tract, or sinuses expands, which can cause tension
pneumothorax, barotrauma, or severe abdominal pain. This is why a patient
with an untreated pneumothorax should not fly. Option A describes Dalton's Law
(partial pressure). Option C relates to Henry's Law. Option D relates to
physical changes in humidity with temperature, not Boyle's Law.
QUESTION 2:
A flight crew ascends from sea level to 8,000 feet cabin altitude. The patient
has a small, untreated pneumothorax. What is the PRIMARY concern?
A) The pneumothorax will resolve due to increased oxygen concentration
B) The pneumothorax will expand as trapped gas volume increases
C) The patient will develop hypothermia
D) The patient's blood pressure will drop due to vasodilation
CORRECT ANSWER: B
1
,RATIONALE: Per Boyle's Law, gas volume expands as ambient pressure decreases.
An untreated pneumothorax will enlarge during ascent, potentially progressing
to a tension pneumothorax. This is a critical transport safety consideration.
Option A is incorrect because the pneumothorax will not resolve without
intervention. Option C and D are unrelated physiological effects of altitude
(though temperature changes do occur, they are not the primary concern).
QUESTION 3:
Dalton's Law explains why hypoxia occurs at altitude despite a constant FiO₂
of 21%. Which statement best describes this phenomenon?
A) The percentage of oxygen in the atmosphere decreases with altitude
B) The total atmospheric pressure decreases, reducing the partial pressure of
oxygen
C) The solubility of oxygen in the blood increases at altitude
D) The affinity of hemoglobin for oxygen decreases at altitude
CORRECT ANSWER: B
RATIONALE: Dalton's Law states that total pressure of a gas mixture equals the
sum of partial pressures. At higher altitudes, total barometric pressure drops,
which proportionally decreases the partial pressure of oxygen (PO₂) even though
the FiO₂ remains 21%. This reduction in alveolar PO₂ drives hypoxemia. Option
A is incorrect because the FiO₂ percentage remains constant. Option C refers to
Henry's Law and is inaccurate in this context. Option D relates to the
oxyhemoglobin dissociation curve, not Dalton's Law.
QUESTION 4:
Charles's Law describes the relationship between gas volume and temperature.
During a flight in a cold environment, what is a potential clinical concern?
A) The O2 cylinder pressure will read falsely high
B) The ventilator tubing may become stiff and prone to fracture
C) Vasodilation will increase heat loss
D) The PA catheter balloon may overinflate
2
,CORRECT ANSWER: B
RATIONALE: Charles's Law states that as temperature decreases, gas volume
decreases (V₁/T₁ = V₂/T₂). In cold environments, the air in ventilator tubing
may become denser and the plastic tubing may become stiff and brittle, prone
to cracking or fracture. Option A is incorrect—oxygen cylinder pressure will
read lower in cold temperatures, not higher. Option C is incorrect because
vasoconstriction, not vasodilation, occurs in cold environments to conserve
heat. Option D is incorrect as the PA catheter balloon contains air that could
contract in cold.
QUESTION 5:
Henry's Law is most relevant to which in-flight patient condition?
A) Decompression sickness and nitrogen bubble formation
B) Hypoxia due to decreased FiO2
C) Expansion of an endotracheal tube cuff
D) Increased airway resistance in cold air
CORRECT ANSWER: A
RATIONALE: Henry's Law states that the amount of gas dissolved in a liquid is
proportional to its partial pressure. At altitude, as ambient pressure drops,
nitrogen that was dissolved in tissues and blood can come out of solution,
forming bubbles—the mechanism of decompression sickness (the "bends"). This
is
why patients with divers' decompression illness are treated with hyperbaric
therapy. Option B relates to Dalton's Law. Option C relates to Boyle's Law.
Option D relates to physical gas behavior at altitude, but Henry's Law most
directly explains dissolved gas in solution.
QUESTION 6:
What is the cabin altitude of a typical pressurized aircraft during cruise?
A) Sea level
3
, B) 2,000 feet
C) 6,000 to 8,000 feet
D) 12,000 to 15,000 feet
CORRECT ANSWER: C
RATIONALE: Most pressurized aircraft maintain a cabin altitude between 6,000
and 8,000 feet during cruise. This balances structural integrity with crew
comfort. At this altitude, the alveolar PO2 is approximately 55-60 mmHg, which
is still adequate for most patients but may challenge those with pre-existing
cardiac or pulmonary disease. Option A is not feasible for structural reasons.
Option D is typical for unpressurized aircraft or high-altitude physiology.
QUESTION 7:
A patient with a baseline SpO2 of 92% on room air at sea level is transported
at 8,000 feet cabin altitude. The SpO2 drops to 85%. What is the BEST
intervention?
A) Increase the cabin pressure to sea level
B) Administer supplemental oxygen
C) Request the pilot to descend immediately
D) Administer a bronchodilator
CORRECT ANSWER: B
RATIONALE: The drop in SpO2 is due to the reduced partial pressure of oxygen
at altitude. The most immediate intervention is to administer supplemental
oxygen. While descending (C) would improve the situation, it is not always
safe or feasible and is not the first-line intervention. Increasing cabin
pressure (A) is not a crew-controlled option in most aircraft. A bronchodilator
(D) would only help if bronchospasm were present.
QUESTION 8:
The Fick Principle is used to calculate which hemodynamic parameter?
A) Cardiac output
4
VERIFIED QUESTIONS |FLIGHT PARAMEDIC & CRITICAL CARE
TRANSPORT ASSESSMENT WITH DETAILED CLINICAL RATIONALES
LATEST UPDATE
SECTION 1: FLIGHT PHYSIOLOGY & GAS LAWS (Q1-30)
QUESTION 1:
Boyle's Law states that the volume of a gas is inversely proportional to
pressure. Which clinical scenario is MOST directly explained by this law during
an air medical transport ascent?
A) Decreased partial pressure of inspired oxygen leading to hypoxia
B) Expansion of a pneumothorax or trapped intestinal gas
C) Decreased solubility of nitrogen in the bloodstream
D) Increased humidity in the ventilator circuit
CORRECT ANSWER: B
RATIONALE: Boyle's Law (P₁V₁ = P₂V₂) explains how gases expand as ambient
pressure decreases during ascent. As the aircraft climbs, trapped gas in a
pneumothorax, intestinal tract, or sinuses expands, which can cause tension
pneumothorax, barotrauma, or severe abdominal pain. This is why a patient
with an untreated pneumothorax should not fly. Option A describes Dalton's Law
(partial pressure). Option C relates to Henry's Law. Option D relates to
physical changes in humidity with temperature, not Boyle's Law.
QUESTION 2:
A flight crew ascends from sea level to 8,000 feet cabin altitude. The patient
has a small, untreated pneumothorax. What is the PRIMARY concern?
A) The pneumothorax will resolve due to increased oxygen concentration
B) The pneumothorax will expand as trapped gas volume increases
C) The patient will develop hypothermia
D) The patient's blood pressure will drop due to vasodilation
CORRECT ANSWER: B
1
,RATIONALE: Per Boyle's Law, gas volume expands as ambient pressure decreases.
An untreated pneumothorax will enlarge during ascent, potentially progressing
to a tension pneumothorax. This is a critical transport safety consideration.
Option A is incorrect because the pneumothorax will not resolve without
intervention. Option C and D are unrelated physiological effects of altitude
(though temperature changes do occur, they are not the primary concern).
QUESTION 3:
Dalton's Law explains why hypoxia occurs at altitude despite a constant FiO₂
of 21%. Which statement best describes this phenomenon?
A) The percentage of oxygen in the atmosphere decreases with altitude
B) The total atmospheric pressure decreases, reducing the partial pressure of
oxygen
C) The solubility of oxygen in the blood increases at altitude
D) The affinity of hemoglobin for oxygen decreases at altitude
CORRECT ANSWER: B
RATIONALE: Dalton's Law states that total pressure of a gas mixture equals the
sum of partial pressures. At higher altitudes, total barometric pressure drops,
which proportionally decreases the partial pressure of oxygen (PO₂) even though
the FiO₂ remains 21%. This reduction in alveolar PO₂ drives hypoxemia. Option
A is incorrect because the FiO₂ percentage remains constant. Option C refers to
Henry's Law and is inaccurate in this context. Option D relates to the
oxyhemoglobin dissociation curve, not Dalton's Law.
QUESTION 4:
Charles's Law describes the relationship between gas volume and temperature.
During a flight in a cold environment, what is a potential clinical concern?
A) The O2 cylinder pressure will read falsely high
B) The ventilator tubing may become stiff and prone to fracture
C) Vasodilation will increase heat loss
D) The PA catheter balloon may overinflate
2
,CORRECT ANSWER: B
RATIONALE: Charles's Law states that as temperature decreases, gas volume
decreases (V₁/T₁ = V₂/T₂). In cold environments, the air in ventilator tubing
may become denser and the plastic tubing may become stiff and brittle, prone
to cracking or fracture. Option A is incorrect—oxygen cylinder pressure will
read lower in cold temperatures, not higher. Option C is incorrect because
vasoconstriction, not vasodilation, occurs in cold environments to conserve
heat. Option D is incorrect as the PA catheter balloon contains air that could
contract in cold.
QUESTION 5:
Henry's Law is most relevant to which in-flight patient condition?
A) Decompression sickness and nitrogen bubble formation
B) Hypoxia due to decreased FiO2
C) Expansion of an endotracheal tube cuff
D) Increased airway resistance in cold air
CORRECT ANSWER: A
RATIONALE: Henry's Law states that the amount of gas dissolved in a liquid is
proportional to its partial pressure. At altitude, as ambient pressure drops,
nitrogen that was dissolved in tissues and blood can come out of solution,
forming bubbles—the mechanism of decompression sickness (the "bends"). This
is
why patients with divers' decompression illness are treated with hyperbaric
therapy. Option B relates to Dalton's Law. Option C relates to Boyle's Law.
Option D relates to physical gas behavior at altitude, but Henry's Law most
directly explains dissolved gas in solution.
QUESTION 6:
What is the cabin altitude of a typical pressurized aircraft during cruise?
A) Sea level
3
, B) 2,000 feet
C) 6,000 to 8,000 feet
D) 12,000 to 15,000 feet
CORRECT ANSWER: C
RATIONALE: Most pressurized aircraft maintain a cabin altitude between 6,000
and 8,000 feet during cruise. This balances structural integrity with crew
comfort. At this altitude, the alveolar PO2 is approximately 55-60 mmHg, which
is still adequate for most patients but may challenge those with pre-existing
cardiac or pulmonary disease. Option A is not feasible for structural reasons.
Option D is typical for unpressurized aircraft or high-altitude physiology.
QUESTION 7:
A patient with a baseline SpO2 of 92% on room air at sea level is transported
at 8,000 feet cabin altitude. The SpO2 drops to 85%. What is the BEST
intervention?
A) Increase the cabin pressure to sea level
B) Administer supplemental oxygen
C) Request the pilot to descend immediately
D) Administer a bronchodilator
CORRECT ANSWER: B
RATIONALE: The drop in SpO2 is due to the reduced partial pressure of oxygen
at altitude. The most immediate intervention is to administer supplemental
oxygen. While descending (C) would improve the situation, it is not always
safe or feasible and is not the first-line intervention. Increasing cabin
pressure (A) is not a crew-controlled option in most aircraft. A bronchodilator
(D) would only help if bronchospasm were present.
QUESTION 8:
The Fick Principle is used to calculate which hemodynamic parameter?
A) Cardiac output
4
