ATLS 10th Edition Post Test 1 - 4 (Latest 2026-
2027) Most Comprehensive Questions &
Answers
Which of the following signs is LEAST reliable for diagnosing esophageal intubation?
A. Symmetrical chest wall movement
B. Presence of end-tidal \(\text{CO}_{2}\) by colorimetry
C. Bilateral breath sounds
D. Endotracheal tube (ETT) tip above the carina on chest x-ray
Correct Answer: D. Endotracheal tube (ETT) tip above the carina on chest x-ray
Key Point: An AP chest X-ray is two-dimensional and cannot differentiate whether a
tube is in the anteriorly located trachea or the posteriorly located esophagus.
Question 2
, Which of the following findings necessitates a definitive airway in a severely injured
trauma patient?
A. Repeated vomiting
B. Severe maxillofacial fractures
C. Sternal fracture
D. Glasgow Coma Scale of 12
Correct Answer: B. Severe maxillofacial fractures
Key Point: Severe facial trauma threatens immediate airway patency due to bleeding,
swelling, or bone instability, mandating a secured, definitive airway.
Question 3
An 18-year-old man presents with a gunshot wound just below the right clavicle and
another at the right costal margin posteriorly. After airway management and placing two
large-bore IV lines, what is the next most appropriate step?
A. Perform a diagnostic peritoneal lavage (DPL)
B. Obtain an abdominal CT scan
C. Obtain a portable chest X-ray
D. Perform immediate exploratory laparotomy
Correct Answer: C. Obtain a portable chest X-ray
Rationale: Penetrating trauma to the "thoracoabdominal box" carries an immediate risk
of life-threatening thoracic pathology like tension pneumothorax or massive
hemothorax. A rapid chest X-ray is required during the primary survey before moving to
advanced abdominal imaging or procedures.
, Question 4
Neurogenic shock resulting from a high cervical spinal cord injury is characterized by all
of the following classic findings EXCEPT:
A. Hypotension
B. Vasodilation
C. Bradycardia
D. Narrowed pulse pressure
Correct Answer: D. Narrowed pulse pressure
Rationale: Neurogenic shock causes a loss of sympathetic tone, leading to massive
vasodilation (causing hypotension) and a lack of compensatory tachycardia (causing
bradycardia). The pulse pressure is typically normal or widened rather than narrowed,
which differentiates it from hypovolemic/hemorrhagic shock.
Question 5
A 22-year-old male presents to a community center with a large right pneumothorax
following a fall. A chest tube is correctly inserted and connected to negative pressure
suction. A repeat chest X-ray reveals a persistent, large right pneumothorax. The
patient is hemodynamically stable. What is the most likely cause?
A. Flail chest
B. Diaphragmatic injury
C. Tracheobronchial injury
D. Severe pulmonary contusion
Correct Answer: C. Tracheobronchial injury
, Rationale: A large, persistent pneumothorax or massive air leak despite a properly
functioning and correctly positioned chest tube is a classic sign of a major structural
airway disruption, such as a tracheobronchial tree injury.
Question 6
Which of the following is the least preferred route of administering large-volume
intravenous fluid resuscitation during a primary trauma survey?
A. Subclavian central venous line
B. Antecubital fossa peripheral veins
C. Saphenous vein cutdown
D. Cephalic vein peripheral lines
Correct Answer: A. Subclavian central venous line
Rationale: The initial access of choice consists of two large-bore (14 or 16-gauge) short
peripheral IV catheters. Central venous lines (like subclavian access) take longer to
place, carry a higher risk of complications (e.g., inadvertent pneumothorax), and offer
higher resistance to rapid fluid flow compared to short, wide peripheral lines.
Question 7
When managing a pediatric trauma patient in hemorrhagic shock, what is the
recommended initial bolus volume for isotonic crystalloid fluid resuscitation?
A. 20 mL/kg
B. 10 mL/kg
2027) Most Comprehensive Questions &
Answers
Which of the following signs is LEAST reliable for diagnosing esophageal intubation?
A. Symmetrical chest wall movement
B. Presence of end-tidal \(\text{CO}_{2}\) by colorimetry
C. Bilateral breath sounds
D. Endotracheal tube (ETT) tip above the carina on chest x-ray
Correct Answer: D. Endotracheal tube (ETT) tip above the carina on chest x-ray
Key Point: An AP chest X-ray is two-dimensional and cannot differentiate whether a
tube is in the anteriorly located trachea or the posteriorly located esophagus.
Question 2
, Which of the following findings necessitates a definitive airway in a severely injured
trauma patient?
A. Repeated vomiting
B. Severe maxillofacial fractures
C. Sternal fracture
D. Glasgow Coma Scale of 12
Correct Answer: B. Severe maxillofacial fractures
Key Point: Severe facial trauma threatens immediate airway patency due to bleeding,
swelling, or bone instability, mandating a secured, definitive airway.
Question 3
An 18-year-old man presents with a gunshot wound just below the right clavicle and
another at the right costal margin posteriorly. After airway management and placing two
large-bore IV lines, what is the next most appropriate step?
A. Perform a diagnostic peritoneal lavage (DPL)
B. Obtain an abdominal CT scan
C. Obtain a portable chest X-ray
D. Perform immediate exploratory laparotomy
Correct Answer: C. Obtain a portable chest X-ray
Rationale: Penetrating trauma to the "thoracoabdominal box" carries an immediate risk
of life-threatening thoracic pathology like tension pneumothorax or massive
hemothorax. A rapid chest X-ray is required during the primary survey before moving to
advanced abdominal imaging or procedures.
, Question 4
Neurogenic shock resulting from a high cervical spinal cord injury is characterized by all
of the following classic findings EXCEPT:
A. Hypotension
B. Vasodilation
C. Bradycardia
D. Narrowed pulse pressure
Correct Answer: D. Narrowed pulse pressure
Rationale: Neurogenic shock causes a loss of sympathetic tone, leading to massive
vasodilation (causing hypotension) and a lack of compensatory tachycardia (causing
bradycardia). The pulse pressure is typically normal or widened rather than narrowed,
which differentiates it from hypovolemic/hemorrhagic shock.
Question 5
A 22-year-old male presents to a community center with a large right pneumothorax
following a fall. A chest tube is correctly inserted and connected to negative pressure
suction. A repeat chest X-ray reveals a persistent, large right pneumothorax. The
patient is hemodynamically stable. What is the most likely cause?
A. Flail chest
B. Diaphragmatic injury
C. Tracheobronchial injury
D. Severe pulmonary contusion
Correct Answer: C. Tracheobronchial injury
, Rationale: A large, persistent pneumothorax or massive air leak despite a properly
functioning and correctly positioned chest tube is a classic sign of a major structural
airway disruption, such as a tracheobronchial tree injury.
Question 6
Which of the following is the least preferred route of administering large-volume
intravenous fluid resuscitation during a primary trauma survey?
A. Subclavian central venous line
B. Antecubital fossa peripheral veins
C. Saphenous vein cutdown
D. Cephalic vein peripheral lines
Correct Answer: A. Subclavian central venous line
Rationale: The initial access of choice consists of two large-bore (14 or 16-gauge) short
peripheral IV catheters. Central venous lines (like subclavian access) take longer to
place, carry a higher risk of complications (e.g., inadvertent pneumothorax), and offer
higher resistance to rapid fluid flow compared to short, wide peripheral lines.
Question 7
When managing a pediatric trauma patient in hemorrhagic shock, what is the
recommended initial bolus volume for isotonic crystalloid fluid resuscitation?
A. 20 mL/kg
B. 10 mL/kg
