PHTLS 10th Edition Pre and Post-Test ()
Updated Questions and Verified Answers, 100%
Guarantee Pass Original Copy
Question 1: The displacement of tissue away from the path of a projectile, both tem-
porarily and permanently, is known as:
A. Conization
B. Cavitation
C. Crepitation
D. Contusion
Correct Answer: B. Cavitation
Explanation: Cavitation refers to the displacement of tissue caused by a
projectile, creating a temporary cavity (due to energy transfer) and a per-
manent cavity (due to direct tissue destruction). This is a critical concept
in understanding penetrating trauma in PHTLS, as it affects the extent of
injury beyond the visible wound track. Conization is unrelated to trauma,
crepitation refers to the grating sound of fractured bones, and contusion
indicates bruising.
Question 2: The single most important factor in determining the potential for injury
due to energy exchange is:
A. Mass of the bodies involved
B. Velocity of the bodies involved
C. Density of the tissues involved
D. Surface area of the impact involved
Correct Answer: B. Velocity of the bodies involved
Explanation: According to the principles of kinematics in PHTLS, veloc-
ity is the most significant factor in determining injury potential because
kinetic energy is proportional to the square of velocity (KE = 1/2 mvš).
Higher velocity increases energy transfer exponentially, leading to greater
tissue damage. Mass, density, and surface area play roles but are secondary
to velocity.
1
,Question 3: In the management of shock, isotonic crystalloid solutions, such as Ringers,
are preferred because:
A. The protein molecules in crystalloid solutions act as volume expanders
B. These fluids draw interstitial fluid into the vascular space to enhance
volume
C. These solutions stay in the vascular space longer than water solutions,
such as D5W
D. Their pH enhances oxygen delivery to the tissues
Correct Answer: C. These solutions stay in the vascular space
longer than water solutions, such as D5W
Explanation: Isotonic crystalloids like Ringers lactate are preferred in
PHTLS for shock management because they remain in the vascular space
longer than hypotonic solutions (e.g., D5W), which rapidly distribute into
interstitial spaces. This helps maintain intravascular volume and support
perfusion. Crystalloids lack protein molecules, and their pH does not di-
rectly enhance oxygen delivery.
Question 4: With respect to the distance of a fall, which of the following is a guideline
for determining a critical fall?
A. 3 times the height of the patient
B. 2 times the height of the patient
C. 5 times the height of the patient
D. 1 ¡ times the height of the patient
Correct Answer: A. 3 times the height of the patient
Explanation: PHTLS guidelines consider a fall from a height greater
than 3 times the patients height (or approximately 1520 feet for adults) as
critical due to the high risk of severe injury. This threshold helps identify
patients requiring trauma center evaluation.
Question 5: The phase of an explosion in which hollow organs are squeezed and may
rupture is called the:
A. Tertiary phase
B. Quaternary phase
C. Secondary phase
D. Primary phase
Correct Answer: D. Primary phase
Explanation: The primary phase of a blast injury involves the pressure
wave causing barotrauma, particularly to air-filled organs like the lungs,
ears, and gastrointestinal tract. This can lead to organ rupture due to
rapid compression and expansion. Secondary (projectile injuries), tertiary
(impact from being thrown), and quaternary (burns, toxins) phases involve
different mechanisms.
Page 2 of 23
, Question 6: During the primary survey, the E in XABCDE stands for:
A. Edema
B. Eyes & ears
C. Expose/Environment
D. Electrical therapy
Correct Answer: C. Expose/Environment
Explanation: In the PHTLS XABCDE assessment, E stands for Ex-
pose/Environment, emphasizing the need to remove clothing to fully assess
injuries while preventing hypothermia by maintaining a warm environment.
This step ensures no injuries are missed during the primary survey.
Question 7: The time in which surgical intervention can make a difference in patient
outcome is known as:
A. Golden period
B. Golden time
C. Golden era
D. Golden minutes
Correct Answer: A. Golden period
Explanation: The golden period (often referred to as the golden hour) is
the critical time frame in which definitive surgical intervention can signifi-
cantly improve outcomes in trauma patients. Rapid transport to a trauma
center is a key PHTLS principle.
Question 8: In the absence of extenuating circumstances, the maximum time to identify
and manage immediate threats to life, prepare the patient for transport,
and begin transport is:
A. 5 minutes
B. 10 minutes
C. 15 minutes
D. 20 minutes
Correct Answer: B. 10 minutes
Explanation: PHTLS emphasizes the 10-minute rule for on-scene time in
critical trauma patients, prioritizing rapid assessment, stabilization, and
transport to minimize delays in definitive care.
Question 9: A trauma patient from a highway incident is holding her right arm, with
a significant amount of blood steadily flowing from a long gash. This is an
example of what type of hemorrhage?
A. Capillary bleeding
B. Venous bleeding
Page 3 of 23
Updated Questions and Verified Answers, 100%
Guarantee Pass Original Copy
Question 1: The displacement of tissue away from the path of a projectile, both tem-
porarily and permanently, is known as:
A. Conization
B. Cavitation
C. Crepitation
D. Contusion
Correct Answer: B. Cavitation
Explanation: Cavitation refers to the displacement of tissue caused by a
projectile, creating a temporary cavity (due to energy transfer) and a per-
manent cavity (due to direct tissue destruction). This is a critical concept
in understanding penetrating trauma in PHTLS, as it affects the extent of
injury beyond the visible wound track. Conization is unrelated to trauma,
crepitation refers to the grating sound of fractured bones, and contusion
indicates bruising.
Question 2: The single most important factor in determining the potential for injury
due to energy exchange is:
A. Mass of the bodies involved
B. Velocity of the bodies involved
C. Density of the tissues involved
D. Surface area of the impact involved
Correct Answer: B. Velocity of the bodies involved
Explanation: According to the principles of kinematics in PHTLS, veloc-
ity is the most significant factor in determining injury potential because
kinetic energy is proportional to the square of velocity (KE = 1/2 mvš).
Higher velocity increases energy transfer exponentially, leading to greater
tissue damage. Mass, density, and surface area play roles but are secondary
to velocity.
1
,Question 3: In the management of shock, isotonic crystalloid solutions, such as Ringers,
are preferred because:
A. The protein molecules in crystalloid solutions act as volume expanders
B. These fluids draw interstitial fluid into the vascular space to enhance
volume
C. These solutions stay in the vascular space longer than water solutions,
such as D5W
D. Their pH enhances oxygen delivery to the tissues
Correct Answer: C. These solutions stay in the vascular space
longer than water solutions, such as D5W
Explanation: Isotonic crystalloids like Ringers lactate are preferred in
PHTLS for shock management because they remain in the vascular space
longer than hypotonic solutions (e.g., D5W), which rapidly distribute into
interstitial spaces. This helps maintain intravascular volume and support
perfusion. Crystalloids lack protein molecules, and their pH does not di-
rectly enhance oxygen delivery.
Question 4: With respect to the distance of a fall, which of the following is a guideline
for determining a critical fall?
A. 3 times the height of the patient
B. 2 times the height of the patient
C. 5 times the height of the patient
D. 1 ¡ times the height of the patient
Correct Answer: A. 3 times the height of the patient
Explanation: PHTLS guidelines consider a fall from a height greater
than 3 times the patients height (or approximately 1520 feet for adults) as
critical due to the high risk of severe injury. This threshold helps identify
patients requiring trauma center evaluation.
Question 5: The phase of an explosion in which hollow organs are squeezed and may
rupture is called the:
A. Tertiary phase
B. Quaternary phase
C. Secondary phase
D. Primary phase
Correct Answer: D. Primary phase
Explanation: The primary phase of a blast injury involves the pressure
wave causing barotrauma, particularly to air-filled organs like the lungs,
ears, and gastrointestinal tract. This can lead to organ rupture due to
rapid compression and expansion. Secondary (projectile injuries), tertiary
(impact from being thrown), and quaternary (burns, toxins) phases involve
different mechanisms.
Page 2 of 23
, Question 6: During the primary survey, the E in XABCDE stands for:
A. Edema
B. Eyes & ears
C. Expose/Environment
D. Electrical therapy
Correct Answer: C. Expose/Environment
Explanation: In the PHTLS XABCDE assessment, E stands for Ex-
pose/Environment, emphasizing the need to remove clothing to fully assess
injuries while preventing hypothermia by maintaining a warm environment.
This step ensures no injuries are missed during the primary survey.
Question 7: The time in which surgical intervention can make a difference in patient
outcome is known as:
A. Golden period
B. Golden time
C. Golden era
D. Golden minutes
Correct Answer: A. Golden period
Explanation: The golden period (often referred to as the golden hour) is
the critical time frame in which definitive surgical intervention can signifi-
cantly improve outcomes in trauma patients. Rapid transport to a trauma
center is a key PHTLS principle.
Question 8: In the absence of extenuating circumstances, the maximum time to identify
and manage immediate threats to life, prepare the patient for transport,
and begin transport is:
A. 5 minutes
B. 10 minutes
C. 15 minutes
D. 20 minutes
Correct Answer: B. 10 minutes
Explanation: PHTLS emphasizes the 10-minute rule for on-scene time in
critical trauma patients, prioritizing rapid assessment, stabilization, and
transport to minimize delays in definitive care.
Question 9: A trauma patient from a highway incident is holding her right arm, with
a significant amount of blood steadily flowing from a long gash. This is an
example of what type of hemorrhage?
A. Capillary bleeding
B. Venous bleeding
Page 3 of 23
