ATLS Trauma-Induced Coagulopathy
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A Instant Download Pdf
1. Which mechanism is most strongly associated with trauma-induced
coagulopathy (TIC) during the early phase of severe injury?
A. Isolated platelet destruction
B. Acute activation of anticoagulant and fibrinolytic pathways after tissue injury
and shock
C. Delayed vitamin K deficiency
D. Chronic liver dysfunction
Answer: B. Acute activation of anticoagulant and fibrinolytic pathways after
tissue injury and shock
Rationale: Early TIC develops rapidly after severe trauma and is associated with
tissue injury, hypoperfusion, endothelial dysfunction, anticoagulant pathway
activation, and dysregulated fibrinolysis.
2. Which clinical condition most strongly increases the risk of TIC?
A. Minor soft-tissue injury
B. Stable isolated fracture
C. Severe hemorrhage accompanied by shock
D. Mild hypertension
,Answer: C. Severe hemorrhage accompanied by shock
Rationale: Severe tissue injury and hypoperfusion are major drivers of early TIC
and are associated with increased mortality.
3. Which laboratory abnormality is most consistent with impaired coagulation
after major trauma?
A. Elevated hemoglobin
B. Shortened prothrombin time
C. Prolonged prothrombin time
D. Increased serum sodium
Answer: C. Prolonged prothrombin time
Rationale: Prolongation of prothrombin time reflects impaired coagulation
factor activity and may occur in significant trauma-associated coagulopathy.
4. What is the primary clinical consequence of severe TIC?
A. Hypertension
B. Uncontrolled bleeding
C. Hyperglycemia alone
D. Isolated bradycardia
Answer: B. Uncontrolled bleeding
Rationale: TIC promotes persistent hemorrhage, increases transfusion
requirements, and is strongly associated with mortality after severe trauma.
5. Which component of the lethal triad directly worsens coagulation enzyme
activity?
A. Hyperthermia
B. Hypercalcemia
C. Hypothermia
D. Alkalosis
Answer: C. Hypothermia
,Rationale: Hypothermia impairs platelet function and enzymatic coagulation
reactions, contributing to progressive coagulopathy.
6. Which acid-base disturbance commonly accompanies severe hemorrhagic
shock and is associated with worsening coagulation?
A. Respiratory alkalosis
B. Metabolic acidosis
C. Metabolic alkalosis
D. Chronic respiratory acidosis
Answer: B. Metabolic acidosis
Rationale: Tissue hypoperfusion produces anaerobic metabolism and lactate
accumulation. Acidosis also impairs coagulation enzyme activity.
7. Which component completes the classic trauma “lethal triad” with
hypothermia and acidosis?
A. Hypernatremia
B. Coagulopathy
C. Hyperglycemia
D. Hypokalemia
Answer: B. Coagulopathy
Rationale: Hypothermia, acidosis, and coagulopathy reinforce one another and
are associated with poor outcomes in severe trauma.
8. What is the preferred initial approach to a trauma patient with suspected
uncontrolled hemorrhage?
A. Delay hemorrhage control until all laboratory tests return
B. Administer crystalloid alone until the hemoglobin normalizes
C. Rapid hemorrhage control with simultaneous resuscitation and blood-product
support when indicated
D. Correct the platelet count before addressing bleeding
, Answer: C. Rapid hemorrhage control with simultaneous resuscitation and
blood-product support when indicated
Rationale: Definitive hemorrhage control and balanced resuscitation are central
to preventing ongoing blood loss and worsening TIC.
9. Which blood product provides fibrinogen?
A. Packed red blood cells only
B. Platelets only
C. Cryoprecipitate or fibrinogen concentrate
D. Normal saline
Answer: C. Cryoprecipitate or fibrinogen concentrate
Rationale: Cryoprecipitate and fibrinogen concentrate are concentrated sources
of fibrinogen and are used when clinically indicated for hypofibrinogenemia.
10. Which coagulation factor is particularly vulnerable to depletion during major
hemorrhage because fibrinogen levels can fall early?
A. Factor XIII only
B. Fibrinogen
C. Factor VIII only
D. Protein C only
Answer: B. Fibrinogen
Rationale: Fibrinogen is essential for clot formation and may become critically
low during severe trauma and massive hemorrhage.
11. What does permissive hypotension generally seek to accomplish in selected
actively bleeding trauma patients without contraindications?
A. Increase blood pressure to hypertensive levels
B. Avoid excessive blood pressure elevation before hemorrhage control
C. Eliminate the need for blood products
D. Produce profound hypotension
Answer: B. Avoid excessive blood pressure elevation before hemorrhage control
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A Instant Download Pdf
1. Which mechanism is most strongly associated with trauma-induced
coagulopathy (TIC) during the early phase of severe injury?
A. Isolated platelet destruction
B. Acute activation of anticoagulant and fibrinolytic pathways after tissue injury
and shock
C. Delayed vitamin K deficiency
D. Chronic liver dysfunction
Answer: B. Acute activation of anticoagulant and fibrinolytic pathways after
tissue injury and shock
Rationale: Early TIC develops rapidly after severe trauma and is associated with
tissue injury, hypoperfusion, endothelial dysfunction, anticoagulant pathway
activation, and dysregulated fibrinolysis.
2. Which clinical condition most strongly increases the risk of TIC?
A. Minor soft-tissue injury
B. Stable isolated fracture
C. Severe hemorrhage accompanied by shock
D. Mild hypertension
,Answer: C. Severe hemorrhage accompanied by shock
Rationale: Severe tissue injury and hypoperfusion are major drivers of early TIC
and are associated with increased mortality.
3. Which laboratory abnormality is most consistent with impaired coagulation
after major trauma?
A. Elevated hemoglobin
B. Shortened prothrombin time
C. Prolonged prothrombin time
D. Increased serum sodium
Answer: C. Prolonged prothrombin time
Rationale: Prolongation of prothrombin time reflects impaired coagulation
factor activity and may occur in significant trauma-associated coagulopathy.
4. What is the primary clinical consequence of severe TIC?
A. Hypertension
B. Uncontrolled bleeding
C. Hyperglycemia alone
D. Isolated bradycardia
Answer: B. Uncontrolled bleeding
Rationale: TIC promotes persistent hemorrhage, increases transfusion
requirements, and is strongly associated with mortality after severe trauma.
5. Which component of the lethal triad directly worsens coagulation enzyme
activity?
A. Hyperthermia
B. Hypercalcemia
C. Hypothermia
D. Alkalosis
Answer: C. Hypothermia
,Rationale: Hypothermia impairs platelet function and enzymatic coagulation
reactions, contributing to progressive coagulopathy.
6. Which acid-base disturbance commonly accompanies severe hemorrhagic
shock and is associated with worsening coagulation?
A. Respiratory alkalosis
B. Metabolic acidosis
C. Metabolic alkalosis
D. Chronic respiratory acidosis
Answer: B. Metabolic acidosis
Rationale: Tissue hypoperfusion produces anaerobic metabolism and lactate
accumulation. Acidosis also impairs coagulation enzyme activity.
7. Which component completes the classic trauma “lethal triad” with
hypothermia and acidosis?
A. Hypernatremia
B. Coagulopathy
C. Hyperglycemia
D. Hypokalemia
Answer: B. Coagulopathy
Rationale: Hypothermia, acidosis, and coagulopathy reinforce one another and
are associated with poor outcomes in severe trauma.
8. What is the preferred initial approach to a trauma patient with suspected
uncontrolled hemorrhage?
A. Delay hemorrhage control until all laboratory tests return
B. Administer crystalloid alone until the hemoglobin normalizes
C. Rapid hemorrhage control with simultaneous resuscitation and blood-product
support when indicated
D. Correct the platelet count before addressing bleeding
, Answer: C. Rapid hemorrhage control with simultaneous resuscitation and
blood-product support when indicated
Rationale: Definitive hemorrhage control and balanced resuscitation are central
to preventing ongoing blood loss and worsening TIC.
9. Which blood product provides fibrinogen?
A. Packed red blood cells only
B. Platelets only
C. Cryoprecipitate or fibrinogen concentrate
D. Normal saline
Answer: C. Cryoprecipitate or fibrinogen concentrate
Rationale: Cryoprecipitate and fibrinogen concentrate are concentrated sources
of fibrinogen and are used when clinically indicated for hypofibrinogenemia.
10. Which coagulation factor is particularly vulnerable to depletion during major
hemorrhage because fibrinogen levels can fall early?
A. Factor XIII only
B. Fibrinogen
C. Factor VIII only
D. Protein C only
Answer: B. Fibrinogen
Rationale: Fibrinogen is essential for clot formation and may become critically
low during severe trauma and massive hemorrhage.
11. What does permissive hypotension generally seek to accomplish in selected
actively bleeding trauma patients without contraindications?
A. Increase blood pressure to hypertensive levels
B. Avoid excessive blood pressure elevation before hemorrhage control
C. Eliminate the need for blood products
D. Produce profound hypotension
Answer: B. Avoid excessive blood pressure elevation before hemorrhage control
