ATLS 11th Edition Test Bank | 300 Questions with
Answers & Detailed Rationales | Advanced Trauma
Life Support | Latest Guide
Question 1: What is the most common cause of airway obstruction in an unconscious
trauma patient?
A. Foreign body aspiration
B. Tongue falling back against the posterior pharynx
C. Laryngeal fracture
D. Maxillofacial trauma
CORRECT ANSWER: B. Tongue falling back against the posterior pharynx
Rationale: Loss of skeletal muscle tone in an unconscious patient allows the tongue to
fall back, obstructing the airway.
Question 2: Which of the following defines a "definitive airway" in ATLS?
A. A supraglottic airway device
B. A cuffed tube placed in the trachea with the cuff inflated and connected to oxygen
C. A nasopharyngeal airway
D. A face mask with a reservoir bag
CORRECT ANSWER: B. A cuffed tube placed in the trachea with the cuff inflated
and connected to oxygen
Rationale: A definitive airway secures the trachea, prevents aspiration, and allows
for mechanical ventilation.
Question 3: What is the initial maneuver to open the airway in a trauma patient with a
suspected cervical spine injury?
A. Head tilt-chin lift
B. Jaw thrust
C. Neck extension
D. Insertion of an oropharyngeal airway
CORRECT ANSWER: B. Jaw thrust
Rationale: The jaw thrust opens the airway while minimizing movement of the
cervical spine.
Question 4: Which of the following is an absolute contraindication to nasotracheal
intubation?
A. Suspected cervical spine injury
B. Midface or basilar skull fractures
C. Trismus
D. Obesity
CORRECT ANSWER: B. Midface or basilar skull fractures
Rationale: Nasotracheal intubation risks intracranial placement of the tube if the
cribriform plate is fractured.
,Question 5: What is the most reliable clinical indicator of adequate ventilation?
A. Normal pulse oximetry
B. Visible chest rise and fall
C. Clear breath sounds
D. Normal end-tidal CO2
CORRECT ANSWER: B. Visible chest rise and fall
Rationale: Visible chest rise and fall confirm that air is actually entering the lungs,
whereas pulse oximetry can remain normal temporarily despite hypoventilation.
Question 6: A surgical airway (cricothyroidotomy) is indicated when:
A. The patient is conscious and protecting their airway
B. Maxillofacial trauma prevents oral or nasal intubation
C. The patient has a mild asthma exacerbation
D. A cervical collar is in place
CORRECT ANSWER: B. Maxillofacial trauma prevents oral or nasal intubation
Rationale: When conventional intubation fails or is impossible due to severe facial
trauma, a surgical airway is required.
Question 7: What is the initial treatment for a suspected tension pneumothorax?
A. Wait for a chest X-ray to confirm
B. Immediate needle decompression
C. Administer high-flow oxygen and observe
D. Perform a diagnostic peritoneal lavage
CORRECT ANSWER: B. Immediate needle decompression
Rationale: Tension pneumothorax is a clinical diagnosis; immediate decompression
is life-saving and should not be delayed for imaging.
Question 8: Where is the recommended site for needle decompression in an adult
according to the latest ATLS guidelines?
A. 2nd intercostal space, mid-clavicular line
B. 5th intercostal space, mid-axillary line
C. 4th intercostal space, anterior axillary line
D. 6th intercostal space, posterior axillary line
CORRECT ANSWER: B. 5th intercostal space, mid-axillary line
Rationale: The 5th ICS mid-axillary line is now preferred in adults due to a higher
success rate and lower chest wall thickness compared to the 2nd ICS.
Question 9: A massive hemothorax is defined as the rapid accumulation of how much
blood in the pleural cavity?
A. >500 mL
B. >1000 mL
C. >1500 mL
D. >2000 mL
CORRECT ANSWER: C. >1500 mL
,Rationale: Massive hemothorax is defined as >1500 mL of blood or ongoing bleeding
of >200 mL/hr for 2-4 hours.
Question 10: What is the primary pathophysiologic problem in flail chest?
A. The paradoxical chest wall motion itself
B. The underlying pulmonary contusion
C. Rib fracture pain
D. Pneumothorax
CORRECT ANSWER: B. The underlying pulmonary contusion
Rationale: While paradoxical motion is the hallmark sign, the underlying pulmonary
contusion is the primary cause of hypoxia and respiratory failure.
Question 11: How should an open pneumothorax (sucking chest wound) be initially
managed?
A. Leave it open to allow air to escape
B. Cover with a 3-sided occlusive dressing
C. Suture it completely closed immediately
D. Pack the wound with gauze
CORRECT ANSWER: B. Cover with a 3-sided occlusive dressing
Rationale: A 3-sided dressing acts as a flutter valve, allowing air to escape during
exhalation but preventing air entry during inhalation.
Question 12: Beck's triad, indicative of cardiac tamponade, consists of:
A. Hypertension, bradycardia, irregular respirations
B. Hypotension, jugular venous distention, muffled heart sounds
C. Tachycardia, tachypnea, cyanosis
D. Unilateral absent breath sounds, tracheal deviation, hyperresonance
CORRECT ANSWER: B. Hypotension, jugular venous distention, muffled heart
sounds
Rationale: These three signs result from impaired cardiac filling due to fluid in the
pericardial sac.
Question 13: What is the most common cause of shock in the trauma patient?
A. Cardiogenic shock
B. Neurogenic shock
C. Hemorrhagic shock
D. Septic shock
CORRECT ANSWER: C. Hemorrhagic shock
Rationale: Hemorrhage is the leading cause of preventable death and the most
common cause of shock in trauma.
Question 14: In Class III hemorrhagic shock, what is the expected heart rate and
blood pressure?
A. HR <100, BP normal
B. HR 100-120, BP normal
, C. HR 120-140, BP decreased
D. HR >140, BP severely decreased
CORRECT ANSWER: C. HR 120-140, BP decreased
Rationale: Class III shock involves 30-40% blood loss, characterized by significant
tachycardia and a drop in systolic blood pressure.
Question 15: What percentage of blood volume is lost in Class IV hemorrhagic
shock?
A. <15%
B. 15-30%
C. 30-40%
D. >40%
CORRECT ANSWER: D. >40%
Rationale: Class IV shock represents life-threatening blood loss exceeding 40% of
total blood volume.
Question 16: What is the initial fluid resuscitation for an adult trauma patient in
hemorrhagic shock?
A. 2 liters of 5% dextrose
B. 1 liter of warmed isotonic crystalloid
C. 3 liters of hypotonic saline
D. Immediate vasopressors
CORRECT ANSWER: B. 1 liter of warmed isotonic crystalloid
Rationale: ATLS recommends an initial 1-liter bolus of warmed isotonic crystalloid
(e.g., Lactated Ringer's) for adults.
Question 17: What is the recommended ratio of blood products in a massive
transfusion protocol?
A. 4:1:1 (PRBCs:FFP:Platelets)
B. 1:1:1 (PRBCs:FFP:Platelets)
C. 1:4:1 (PRBCs:FFP:Platelets)
D. 2:2:1 (PRBCs:FFP:Platelets)
CORRECT ANSWER: B. 1:1:1 (PRBCs:FFP:Platelets)
Rationale: A 1:1:1 ratio mimics whole blood and helps prevent trauma-induced
coagulopathy.
Question 18: Where should a pelvic binder be applied?
A. At the level of the iliac crests
B. At the level of the greater trochanters
C. At the level of the umbilicus
D. Around the upper thighs
CORRECT ANSWER: B. At the level of the greater trochanters
Rationale: Placement at the greater trochanters effectively reduces the pelvic
volume and stabilizes the fracture; placement at the iliac crests can worsen the
injury.
Answers & Detailed Rationales | Advanced Trauma
Life Support | Latest Guide
Question 1: What is the most common cause of airway obstruction in an unconscious
trauma patient?
A. Foreign body aspiration
B. Tongue falling back against the posterior pharynx
C. Laryngeal fracture
D. Maxillofacial trauma
CORRECT ANSWER: B. Tongue falling back against the posterior pharynx
Rationale: Loss of skeletal muscle tone in an unconscious patient allows the tongue to
fall back, obstructing the airway.
Question 2: Which of the following defines a "definitive airway" in ATLS?
A. A supraglottic airway device
B. A cuffed tube placed in the trachea with the cuff inflated and connected to oxygen
C. A nasopharyngeal airway
D. A face mask with a reservoir bag
CORRECT ANSWER: B. A cuffed tube placed in the trachea with the cuff inflated
and connected to oxygen
Rationale: A definitive airway secures the trachea, prevents aspiration, and allows
for mechanical ventilation.
Question 3: What is the initial maneuver to open the airway in a trauma patient with a
suspected cervical spine injury?
A. Head tilt-chin lift
B. Jaw thrust
C. Neck extension
D. Insertion of an oropharyngeal airway
CORRECT ANSWER: B. Jaw thrust
Rationale: The jaw thrust opens the airway while minimizing movement of the
cervical spine.
Question 4: Which of the following is an absolute contraindication to nasotracheal
intubation?
A. Suspected cervical spine injury
B. Midface or basilar skull fractures
C. Trismus
D. Obesity
CORRECT ANSWER: B. Midface or basilar skull fractures
Rationale: Nasotracheal intubation risks intracranial placement of the tube if the
cribriform plate is fractured.
,Question 5: What is the most reliable clinical indicator of adequate ventilation?
A. Normal pulse oximetry
B. Visible chest rise and fall
C. Clear breath sounds
D. Normal end-tidal CO2
CORRECT ANSWER: B. Visible chest rise and fall
Rationale: Visible chest rise and fall confirm that air is actually entering the lungs,
whereas pulse oximetry can remain normal temporarily despite hypoventilation.
Question 6: A surgical airway (cricothyroidotomy) is indicated when:
A. The patient is conscious and protecting their airway
B. Maxillofacial trauma prevents oral or nasal intubation
C. The patient has a mild asthma exacerbation
D. A cervical collar is in place
CORRECT ANSWER: B. Maxillofacial trauma prevents oral or nasal intubation
Rationale: When conventional intubation fails or is impossible due to severe facial
trauma, a surgical airway is required.
Question 7: What is the initial treatment for a suspected tension pneumothorax?
A. Wait for a chest X-ray to confirm
B. Immediate needle decompression
C. Administer high-flow oxygen and observe
D. Perform a diagnostic peritoneal lavage
CORRECT ANSWER: B. Immediate needle decompression
Rationale: Tension pneumothorax is a clinical diagnosis; immediate decompression
is life-saving and should not be delayed for imaging.
Question 8: Where is the recommended site for needle decompression in an adult
according to the latest ATLS guidelines?
A. 2nd intercostal space, mid-clavicular line
B. 5th intercostal space, mid-axillary line
C. 4th intercostal space, anterior axillary line
D. 6th intercostal space, posterior axillary line
CORRECT ANSWER: B. 5th intercostal space, mid-axillary line
Rationale: The 5th ICS mid-axillary line is now preferred in adults due to a higher
success rate and lower chest wall thickness compared to the 2nd ICS.
Question 9: A massive hemothorax is defined as the rapid accumulation of how much
blood in the pleural cavity?
A. >500 mL
B. >1000 mL
C. >1500 mL
D. >2000 mL
CORRECT ANSWER: C. >1500 mL
,Rationale: Massive hemothorax is defined as >1500 mL of blood or ongoing bleeding
of >200 mL/hr for 2-4 hours.
Question 10: What is the primary pathophysiologic problem in flail chest?
A. The paradoxical chest wall motion itself
B. The underlying pulmonary contusion
C. Rib fracture pain
D. Pneumothorax
CORRECT ANSWER: B. The underlying pulmonary contusion
Rationale: While paradoxical motion is the hallmark sign, the underlying pulmonary
contusion is the primary cause of hypoxia and respiratory failure.
Question 11: How should an open pneumothorax (sucking chest wound) be initially
managed?
A. Leave it open to allow air to escape
B. Cover with a 3-sided occlusive dressing
C. Suture it completely closed immediately
D. Pack the wound with gauze
CORRECT ANSWER: B. Cover with a 3-sided occlusive dressing
Rationale: A 3-sided dressing acts as a flutter valve, allowing air to escape during
exhalation but preventing air entry during inhalation.
Question 12: Beck's triad, indicative of cardiac tamponade, consists of:
A. Hypertension, bradycardia, irregular respirations
B. Hypotension, jugular venous distention, muffled heart sounds
C. Tachycardia, tachypnea, cyanosis
D. Unilateral absent breath sounds, tracheal deviation, hyperresonance
CORRECT ANSWER: B. Hypotension, jugular venous distention, muffled heart
sounds
Rationale: These three signs result from impaired cardiac filling due to fluid in the
pericardial sac.
Question 13: What is the most common cause of shock in the trauma patient?
A. Cardiogenic shock
B. Neurogenic shock
C. Hemorrhagic shock
D. Septic shock
CORRECT ANSWER: C. Hemorrhagic shock
Rationale: Hemorrhage is the leading cause of preventable death and the most
common cause of shock in trauma.
Question 14: In Class III hemorrhagic shock, what is the expected heart rate and
blood pressure?
A. HR <100, BP normal
B. HR 100-120, BP normal
, C. HR 120-140, BP decreased
D. HR >140, BP severely decreased
CORRECT ANSWER: C. HR 120-140, BP decreased
Rationale: Class III shock involves 30-40% blood loss, characterized by significant
tachycardia and a drop in systolic blood pressure.
Question 15: What percentage of blood volume is lost in Class IV hemorrhagic
shock?
A. <15%
B. 15-30%
C. 30-40%
D. >40%
CORRECT ANSWER: D. >40%
Rationale: Class IV shock represents life-threatening blood loss exceeding 40% of
total blood volume.
Question 16: What is the initial fluid resuscitation for an adult trauma patient in
hemorrhagic shock?
A. 2 liters of 5% dextrose
B. 1 liter of warmed isotonic crystalloid
C. 3 liters of hypotonic saline
D. Immediate vasopressors
CORRECT ANSWER: B. 1 liter of warmed isotonic crystalloid
Rationale: ATLS recommends an initial 1-liter bolus of warmed isotonic crystalloid
(e.g., Lactated Ringer's) for adults.
Question 17: What is the recommended ratio of blood products in a massive
transfusion protocol?
A. 4:1:1 (PRBCs:FFP:Platelets)
B. 1:1:1 (PRBCs:FFP:Platelets)
C. 1:4:1 (PRBCs:FFP:Platelets)
D. 2:2:1 (PRBCs:FFP:Platelets)
CORRECT ANSWER: B. 1:1:1 (PRBCs:FFP:Platelets)
Rationale: A 1:1:1 ratio mimics whole blood and helps prevent trauma-induced
coagulopathy.
Question 18: Where should a pelvic binder be applied?
A. At the level of the iliac crests
B. At the level of the greater trochanters
C. At the level of the umbilicus
D. Around the upper thighs
CORRECT ANSWER: B. At the level of the greater trochanters
Rationale: Placement at the greater trochanters effectively reduces the pelvic
volume and stabilizes the fracture; placement at the iliac crests can worsen the
injury.
