ATLS Vasopressor Use in Trauma
Practice Test Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. In a severely injured patient with suspected hemorrhagic shock,
what is the primary priority before considering vasopressor
therapy?
A. Initiation of a continuous norepinephrine infusion
B. Immediate administration of a beta-blocker
C. Control of hemorrhage and restoration of adequate circulating volume
D. Administration of a high-dose corticosteroid
Answer: C. Control of hemorrhage and restoration of adequate
circulating volume
Rationale: Vasopressors do not correct the underlying loss of blood.
Hemorrhage control and appropriate blood-product resuscitation are
fundamental. Vasopressors may be considered selectively when
hypotension persists despite appropriate resuscitative measures or
when another mechanism of shock contributes.
2. Which physiologic problem is most directly addressed by a
vasopressor?
A. Loss of red blood cells
B. Reduced vascular tone
,C. Tissue laceration
D. Coagulopathy
Answer: B. Reduced vascular tone
Answer: B. Reduced vascular tone
Rationale: Vasopressors increase vascular tone through alpha-
adrenergic or other vasoconstrictive mechanisms. They can increase
vascular resistance and arterial pressure but cannot replace lost blood
volume or oxygen-carrying capacity.
3. Which vasopressor is commonly selected when persistent
hypotension is primarily related to inadequate vascular tone?
A. Norepinephrine
B. Furosemide
C. Insulin
D. Adenosine
Answer: A. Norepinephrine
Rationale: Norepinephrine provides substantial alpha-adrenergic
vasoconstriction with some beta-adrenergic activity. It is commonly
used when vasopressor support is required for vasodilatory shock,
while the underlying cause is simultaneously addressed.
4. A trauma patient remains hypotensive after initial blood-product
resuscitation and hemorrhage control. Which finding would most
strongly support continuing evaluation rather than simply
escalating a vasopressor?
A. Persistent evidence of occult bleeding
B. Normal peripheral perfusion
C. Normal lactate trend
D. Stable hemoglobin after repeated assessment
,Answer: A. Persistent evidence of occult bleeding
Rationale: Persistent hypotension in trauma should prompt
reassessment for ongoing hemorrhage, cardiac dysfunction,
obstructive shock, or other causes. Increasing vasopressor doses
without correcting an unrecognized cause can increase
vasoconstriction while the fundamental problem remains untreated.
5. What is the principal danger of using a vasopressor as a substitute
for hemorrhage control?
A. It immediately corrects coagulopathy
B. It can mask inadequate resuscitation while tissue perfusion remains
impaired
C. It increases circulating blood volume
D. It restores hemoglobin concentration
Answer: B. It can mask inadequate resuscitation while tissue
perfusion remains impaired
Rationale: Raising arterial pressure pharmacologically does not
restore lost circulating volume or oxygen delivery. Excessive
vasoconstriction may also compromise regional perfusion. The source
of shock must remain the focus of treatment.
6. Which receptor effect is primarily responsible for the
vasoconstrictive action of norepinephrine?
A. Alpha-1 adrenergic stimulation
B. Muscarinic stimulation
C. Dopamine D2 blockade
D. Histamine H1 stimulation
Answer: A. Alpha-1 adrenergic stimulation
, Rationale: Alpha-1 receptor stimulation contracts vascular smooth
muscle and increases systemic vascular resistance. Norepinephrine
also has beta-1 activity, which can support myocardial contractility,
although its predominant clinically useful effect is vasoconstriction.
7. In trauma resuscitation, why should vasopressor use generally be
individualized rather than automatically initiated for every low
blood-pressure reading?
A. Hypotension has only one possible cause
B. Blood pressure alone does not establish the mechanism of shock
C. Vasopressors always cause bradycardia
D. Vasopressors have no effect on vascular tone
Answer: B. Blood pressure alone does not establish the mechanism
of shock
Rationale: Hypotension can result from hemorrhage, obstructive
shock, cardiogenic dysfunction, neurogenic shock, or mixed causes.
Management should identify and treat the underlying physiology
rather than responding to a number alone.
8. A trauma patient has profound hypotension, cool skin, tachycardia,
and ongoing external bleeding. Which intervention should take
precedence?
A. High-dose vasopressor infusion
B. Hemorrhage control and blood-product resuscitation
C. Diuretic administration
D. Calcium-channel blockade
Answer: B. Hemorrhage control and blood-product resuscitation
Rationale: The presentation is consistent with hemorrhagic shock.
Immediate hemorrhage control and appropriate blood-component
Practice Test Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. In a severely injured patient with suspected hemorrhagic shock,
what is the primary priority before considering vasopressor
therapy?
A. Initiation of a continuous norepinephrine infusion
B. Immediate administration of a beta-blocker
C. Control of hemorrhage and restoration of adequate circulating volume
D. Administration of a high-dose corticosteroid
Answer: C. Control of hemorrhage and restoration of adequate
circulating volume
Rationale: Vasopressors do not correct the underlying loss of blood.
Hemorrhage control and appropriate blood-product resuscitation are
fundamental. Vasopressors may be considered selectively when
hypotension persists despite appropriate resuscitative measures or
when another mechanism of shock contributes.
2. Which physiologic problem is most directly addressed by a
vasopressor?
A. Loss of red blood cells
B. Reduced vascular tone
,C. Tissue laceration
D. Coagulopathy
Answer: B. Reduced vascular tone
Answer: B. Reduced vascular tone
Rationale: Vasopressors increase vascular tone through alpha-
adrenergic or other vasoconstrictive mechanisms. They can increase
vascular resistance and arterial pressure but cannot replace lost blood
volume or oxygen-carrying capacity.
3. Which vasopressor is commonly selected when persistent
hypotension is primarily related to inadequate vascular tone?
A. Norepinephrine
B. Furosemide
C. Insulin
D. Adenosine
Answer: A. Norepinephrine
Rationale: Norepinephrine provides substantial alpha-adrenergic
vasoconstriction with some beta-adrenergic activity. It is commonly
used when vasopressor support is required for vasodilatory shock,
while the underlying cause is simultaneously addressed.
4. A trauma patient remains hypotensive after initial blood-product
resuscitation and hemorrhage control. Which finding would most
strongly support continuing evaluation rather than simply
escalating a vasopressor?
A. Persistent evidence of occult bleeding
B. Normal peripheral perfusion
C. Normal lactate trend
D. Stable hemoglobin after repeated assessment
,Answer: A. Persistent evidence of occult bleeding
Rationale: Persistent hypotension in trauma should prompt
reassessment for ongoing hemorrhage, cardiac dysfunction,
obstructive shock, or other causes. Increasing vasopressor doses
without correcting an unrecognized cause can increase
vasoconstriction while the fundamental problem remains untreated.
5. What is the principal danger of using a vasopressor as a substitute
for hemorrhage control?
A. It immediately corrects coagulopathy
B. It can mask inadequate resuscitation while tissue perfusion remains
impaired
C. It increases circulating blood volume
D. It restores hemoglobin concentration
Answer: B. It can mask inadequate resuscitation while tissue
perfusion remains impaired
Rationale: Raising arterial pressure pharmacologically does not
restore lost circulating volume or oxygen delivery. Excessive
vasoconstriction may also compromise regional perfusion. The source
of shock must remain the focus of treatment.
6. Which receptor effect is primarily responsible for the
vasoconstrictive action of norepinephrine?
A. Alpha-1 adrenergic stimulation
B. Muscarinic stimulation
C. Dopamine D2 blockade
D. Histamine H1 stimulation
Answer: A. Alpha-1 adrenergic stimulation
, Rationale: Alpha-1 receptor stimulation contracts vascular smooth
muscle and increases systemic vascular resistance. Norepinephrine
also has beta-1 activity, which can support myocardial contractility,
although its predominant clinically useful effect is vasoconstriction.
7. In trauma resuscitation, why should vasopressor use generally be
individualized rather than automatically initiated for every low
blood-pressure reading?
A. Hypotension has only one possible cause
B. Blood pressure alone does not establish the mechanism of shock
C. Vasopressors always cause bradycardia
D. Vasopressors have no effect on vascular tone
Answer: B. Blood pressure alone does not establish the mechanism
of shock
Rationale: Hypotension can result from hemorrhage, obstructive
shock, cardiogenic dysfunction, neurogenic shock, or mixed causes.
Management should identify and treat the underlying physiology
rather than responding to a number alone.
8. A trauma patient has profound hypotension, cool skin, tachycardia,
and ongoing external bleeding. Which intervention should take
precedence?
A. High-dose vasopressor infusion
B. Hemorrhage control and blood-product resuscitation
C. Diuretic administration
D. Calcium-channel blockade
Answer: B. Hemorrhage control and blood-product resuscitation
Rationale: The presentation is consistent with hemorrhagic shock.
Immediate hemorrhage control and appropriate blood-component
