ATLS Post Test Updated 2026 | Advanced Trauma Life Support
Comprehensive Study Guide, Practice Exam Questions and Answers,
Exam Prep Test Bank, Trauma Assessment Protocols, Primary and
Secondary Survey Review, Emergency Airway Management, Shock
Recognition, Injury Stabilization Strategies, and Detailed Rationales for
Trauma Certification Preparation
Question 1: A 25-year-old male is brought to the emergency department after a
high-speed motor vehicle collision. He is unconscious with a GCS of 6. His vital
signs show BP 80/40 mmHg, HR 130 bpm, and RR 8/min. What is the FIRST priority
in management?
A. Insert two large-bore IV lines
B. Perform endotracheal intubation
C. Obtain a CT scan of the head
D. Apply a cervical collar
CORRECT ANSWER: B. Perform endotracheal intubation
Rationale: According to ATLS principles, the primary survey follows the ABCDE
sequence. Airway with cervical spine protection is the first priority. This patient has a
GCS of 6 (less than 8), which indicates an inability to protect the airway, making
endotracheal intubation the immediate priority before addressing circulation or
diagnostic imaging.
Question 2: Which of the following is the most reliable clinical sign of tension
pneumothorax?
A. Hyperresonance on percussion
B. Tracheal deviation away from the affected side
C. Hypotension and distended neck veins
D. Absent breath sounds on the affected side
CORRECT ANSWER: C. Hypotension and distended neck veins
Rationale: Tension pneumothorax is a clinical diagnosis characterized by hemodynamic
compromise due to impaired venous return. The combination of hypotension
(obstructive shock) and distended neck veins (due to increased intrathoracic pressure)
is the most reliable indicator. Tracheal deviation is a late sign, and absent breath sounds
can occur in simple pneumothorax without tension physiology.
Question 3: A patient presents with a pelvic fracture and ongoing hemorrhage
despite pelvic binding. Blood pressure remains 85/50 mmHg despite transfusion.
What is the next best step in management?
A. Immediate external fixation
B. Angiographic embolization
C. Open reduction internal fixation
D. Application of a traction splint
,CORRECT ANSWER: B. Angiographic embolization
Rationale: In patients with pelvic fractures and hemodynamic instability despite
mechanical stabilization (pelvic binder) and resuscitation, arterial bleeding is
suspected. Angiographic embolization is the preferred intervention to control arterial
hemorrhage. External fixation may be used but does not address active arterial bleeding
as effectively as embolization in this acute setting.
Question 4: During the primary survey, you identify a patient with flail chest. What
is the underlying pathophysiology that causes respiratory compromise?
A. Direct lung laceration
B. Paradoxical chest wall movement and underlying pulmonary contusion
C. Hemothorax accumulation
D. Diaphragmatic rupture
CORRECT ANSWER: B. Paradoxical chest wall movement and underlying
pulmonary contusion
Rationale: Flail chest occurs when multiple adjacent ribs are fractured in multiple
places, creating a free-floating segment. While paradoxical movement impairs
ventilation, the primary cause of hypoxia and respiratory failure is the underlying
pulmonary contusion, which causes ventilation-perfusion mismatch and decreased
lung compliance.
Question 5: A trauma patient arrives with a knife wound to the left chest at the 4th
intercostal space, midclavicular line. Breath sounds are absent on the left, and the
patient is hypotensive. What is the immediate intervention?
A. Chest X-ray
B. Needle decompression followed by tube thoracostomy
C. Pericardiocentesis
D. Emergency thoracotomy
CORRECT ANSWER: B. Needle decompression followed by tube thoracostomy
Rationale: The clinical presentation suggests tension pneumothorax (absent breath
sounds, hypotension). This is a clinical diagnosis requiring immediate needle
decompression to relieve pressure, followed by definitive management with tube
thoracostomy. Waiting for a chest X-ray would delay life-saving treatment.
Question 6: Which of the following best describes the "Golden Hour" concept in
trauma care?
A. The time window for administering antibiotics in open fractures
B. The critical period during which prompt medical and surgical treatment prevents
death
C. The time required to complete the primary survey
D. The maximum time allowed for CT scanning
,CORRECT ANSWER: B. The critical period during which prompt medical and
surgical treatment prevents death
Rationale: The "Golden Hour" refers to the concept that definitive care within the first
hour after injury significantly improves survival rates. It emphasizes the importance of
rapid assessment, resuscitation, and transport to appropriate facilities to prevent
preventable deaths.
Question 7: A patient with severe head injury has a blood pressure of 90/60 mmHg.
Why is this finding concerning?
A. It indicates neurogenic shock
B. Hypotension is rarely caused by head injury alone and suggests additional
hemorrhage
C. It is a normal finding in head trauma
D. It indicates increased intracranial pressure
CORRECT ANSWER: B. Hypotension is rarely caused by head injury alone and
suggests additional hemorrhage
Rationale: Isolated head injury typically causes hypertension (Cushing's triad) rather
than hypotension. Hypotension in a trauma patient with head injury should prompt
investigation for other sources of hemorrhage (chest, abdomen, pelvis, extremities) as
hypotension worsens secondary brain injury by reducing cerebral perfusion pressure.
Question 8: What is the recommended depth of chest compressions during CPR in
adult trauma patients?
A. At least 2 inches (5 cm)
B. At least 1.5 inches (4 cm)
C. At least 3 inches (7.5 cm)
D. At least 1 inch (2.5 cm)
CORRECT ANSWER: A. At least 2 inches (5 cm)
Rationale: Current ACLS and ATLS guidelines recommend chest compressions to a
depth of at least 2 inches (5 cm) but not more than 2.4 inches (6 cm) in adults. This
depth ensures adequate cardiac output during resuscitation efforts.
Question 9: A patient presents with Beck's triad. Which of the following
components is NOT part of Beck's triad?
A. Hypotension
B. Distended neck veins
C. Muffled heart sounds
D. Pulsus paradoxus
CORRECT ANSWER: D. Pulsus paradoxus
, Rationale: Beck's triad consists of hypotension, distended neck veins (JVD), and
muffled heart sounds, indicating cardiac tamponade. Pulsus paradoxus may be present
in cardiac tamponade but is not part of the classic Beck's triad.
Question 10: In the ATLS classification of hemorrhagic shock, Class III hemorrhage
is characterized by:
A. Blood loss up to 15%, normal vital signs
B. Blood loss 15-30%, tachycardia, narrow pulse pressure
C. Blood loss 30-40%, marked tachycardia, hypotension, confusion
D. Blood loss >40%, profound shock, coma
CORRECT ANSWER: C. Blood loss 30-40%, marked tachycardia, hypotension,
confusion
Rationale: Class III hemorrhagic shock involves 30-40% blood loss (1500-2000 mL).
Patients exhibit marked tachycardia (>120 bpm), hypotension, decreased urine output,
and altered mental status (confusion/anxiety). This class requires aggressive fluid
resuscitation and blood transfusion.
Question 11: Which cervical spine clearance criterion is part of the NEXUS criteria?
A. Age less than 65 years
B. No midline cervical tenderness
C. Normal CT scan of the cervical spine
D. Ability to rotate neck 45 degrees
CORRECT ANSWER: B. No midline cervical tenderness
Rationale: The NEXUS criteria for cervical spine clearance include: no posterior midline
cervical tenderness, no focal neurologic deficit, normal alertness, no intoxication, and
no painful distracting injury. All five criteria must be met to clinically clear the cervical
spine without imaging.
Question 12: A trauma patient has a Glasgow Coma Scale score of 10. How is this
calculated if the patient opens eyes to voice, uses inappropriate words, and
localizes pain?
A. E3 V3 M4
B. E3 V2 M5
C. E4 V3 M5
D. E2 V3 M4
CORRECT ANSWER: A. E3 V3 M4
Rationale: Eye opening to voice = 3, inappropriate words = 3, localizes pain = 4. Total
GCS = 3 + 3 + 4 = 10. This scoring helps assess the severity of traumatic brain injury and
guides management decisions including airway protection.
Comprehensive Study Guide, Practice Exam Questions and Answers,
Exam Prep Test Bank, Trauma Assessment Protocols, Primary and
Secondary Survey Review, Emergency Airway Management, Shock
Recognition, Injury Stabilization Strategies, and Detailed Rationales for
Trauma Certification Preparation
Question 1: A 25-year-old male is brought to the emergency department after a
high-speed motor vehicle collision. He is unconscious with a GCS of 6. His vital
signs show BP 80/40 mmHg, HR 130 bpm, and RR 8/min. What is the FIRST priority
in management?
A. Insert two large-bore IV lines
B. Perform endotracheal intubation
C. Obtain a CT scan of the head
D. Apply a cervical collar
CORRECT ANSWER: B. Perform endotracheal intubation
Rationale: According to ATLS principles, the primary survey follows the ABCDE
sequence. Airway with cervical spine protection is the first priority. This patient has a
GCS of 6 (less than 8), which indicates an inability to protect the airway, making
endotracheal intubation the immediate priority before addressing circulation or
diagnostic imaging.
Question 2: Which of the following is the most reliable clinical sign of tension
pneumothorax?
A. Hyperresonance on percussion
B. Tracheal deviation away from the affected side
C. Hypotension and distended neck veins
D. Absent breath sounds on the affected side
CORRECT ANSWER: C. Hypotension and distended neck veins
Rationale: Tension pneumothorax is a clinical diagnosis characterized by hemodynamic
compromise due to impaired venous return. The combination of hypotension
(obstructive shock) and distended neck veins (due to increased intrathoracic pressure)
is the most reliable indicator. Tracheal deviation is a late sign, and absent breath sounds
can occur in simple pneumothorax without tension physiology.
Question 3: A patient presents with a pelvic fracture and ongoing hemorrhage
despite pelvic binding. Blood pressure remains 85/50 mmHg despite transfusion.
What is the next best step in management?
A. Immediate external fixation
B. Angiographic embolization
C. Open reduction internal fixation
D. Application of a traction splint
,CORRECT ANSWER: B. Angiographic embolization
Rationale: In patients with pelvic fractures and hemodynamic instability despite
mechanical stabilization (pelvic binder) and resuscitation, arterial bleeding is
suspected. Angiographic embolization is the preferred intervention to control arterial
hemorrhage. External fixation may be used but does not address active arterial bleeding
as effectively as embolization in this acute setting.
Question 4: During the primary survey, you identify a patient with flail chest. What
is the underlying pathophysiology that causes respiratory compromise?
A. Direct lung laceration
B. Paradoxical chest wall movement and underlying pulmonary contusion
C. Hemothorax accumulation
D. Diaphragmatic rupture
CORRECT ANSWER: B. Paradoxical chest wall movement and underlying
pulmonary contusion
Rationale: Flail chest occurs when multiple adjacent ribs are fractured in multiple
places, creating a free-floating segment. While paradoxical movement impairs
ventilation, the primary cause of hypoxia and respiratory failure is the underlying
pulmonary contusion, which causes ventilation-perfusion mismatch and decreased
lung compliance.
Question 5: A trauma patient arrives with a knife wound to the left chest at the 4th
intercostal space, midclavicular line. Breath sounds are absent on the left, and the
patient is hypotensive. What is the immediate intervention?
A. Chest X-ray
B. Needle decompression followed by tube thoracostomy
C. Pericardiocentesis
D. Emergency thoracotomy
CORRECT ANSWER: B. Needle decompression followed by tube thoracostomy
Rationale: The clinical presentation suggests tension pneumothorax (absent breath
sounds, hypotension). This is a clinical diagnosis requiring immediate needle
decompression to relieve pressure, followed by definitive management with tube
thoracostomy. Waiting for a chest X-ray would delay life-saving treatment.
Question 6: Which of the following best describes the "Golden Hour" concept in
trauma care?
A. The time window for administering antibiotics in open fractures
B. The critical period during which prompt medical and surgical treatment prevents
death
C. The time required to complete the primary survey
D. The maximum time allowed for CT scanning
,CORRECT ANSWER: B. The critical period during which prompt medical and
surgical treatment prevents death
Rationale: The "Golden Hour" refers to the concept that definitive care within the first
hour after injury significantly improves survival rates. It emphasizes the importance of
rapid assessment, resuscitation, and transport to appropriate facilities to prevent
preventable deaths.
Question 7: A patient with severe head injury has a blood pressure of 90/60 mmHg.
Why is this finding concerning?
A. It indicates neurogenic shock
B. Hypotension is rarely caused by head injury alone and suggests additional
hemorrhage
C. It is a normal finding in head trauma
D. It indicates increased intracranial pressure
CORRECT ANSWER: B. Hypotension is rarely caused by head injury alone and
suggests additional hemorrhage
Rationale: Isolated head injury typically causes hypertension (Cushing's triad) rather
than hypotension. Hypotension in a trauma patient with head injury should prompt
investigation for other sources of hemorrhage (chest, abdomen, pelvis, extremities) as
hypotension worsens secondary brain injury by reducing cerebral perfusion pressure.
Question 8: What is the recommended depth of chest compressions during CPR in
adult trauma patients?
A. At least 2 inches (5 cm)
B. At least 1.5 inches (4 cm)
C. At least 3 inches (7.5 cm)
D. At least 1 inch (2.5 cm)
CORRECT ANSWER: A. At least 2 inches (5 cm)
Rationale: Current ACLS and ATLS guidelines recommend chest compressions to a
depth of at least 2 inches (5 cm) but not more than 2.4 inches (6 cm) in adults. This
depth ensures adequate cardiac output during resuscitation efforts.
Question 9: A patient presents with Beck's triad. Which of the following
components is NOT part of Beck's triad?
A. Hypotension
B. Distended neck veins
C. Muffled heart sounds
D. Pulsus paradoxus
CORRECT ANSWER: D. Pulsus paradoxus
, Rationale: Beck's triad consists of hypotension, distended neck veins (JVD), and
muffled heart sounds, indicating cardiac tamponade. Pulsus paradoxus may be present
in cardiac tamponade but is not part of the classic Beck's triad.
Question 10: In the ATLS classification of hemorrhagic shock, Class III hemorrhage
is characterized by:
A. Blood loss up to 15%, normal vital signs
B. Blood loss 15-30%, tachycardia, narrow pulse pressure
C. Blood loss 30-40%, marked tachycardia, hypotension, confusion
D. Blood loss >40%, profound shock, coma
CORRECT ANSWER: C. Blood loss 30-40%, marked tachycardia, hypotension,
confusion
Rationale: Class III hemorrhagic shock involves 30-40% blood loss (1500-2000 mL).
Patients exhibit marked tachycardia (>120 bpm), hypotension, decreased urine output,
and altered mental status (confusion/anxiety). This class requires aggressive fluid
resuscitation and blood transfusion.
Question 11: Which cervical spine clearance criterion is part of the NEXUS criteria?
A. Age less than 65 years
B. No midline cervical tenderness
C. Normal CT scan of the cervical spine
D. Ability to rotate neck 45 degrees
CORRECT ANSWER: B. No midline cervical tenderness
Rationale: The NEXUS criteria for cervical spine clearance include: no posterior midline
cervical tenderness, no focal neurologic deficit, normal alertness, no intoxication, and
no painful distracting injury. All five criteria must be met to clinically clear the cervical
spine without imaging.
Question 12: A trauma patient has a Glasgow Coma Scale score of 10. How is this
calculated if the patient opens eyes to voice, uses inappropriate words, and
localizes pain?
A. E3 V3 M4
B. E3 V2 M5
C. E4 V3 M5
D. E2 V3 M4
CORRECT ANSWER: A. E3 V3 M4
Rationale: Eye opening to voice = 3, inappropriate words = 3, localizes pain = 4. Total
GCS = 3 + 3 + 4 = 10. This scoring helps assess the severity of traumatic brain injury and
guides management decisions including airway protection.
