CAISS EXAM 2026/2027 UPDATED VERSION — COMPLETE TEST BANK
WITH CORRECT ANSWERS AND DETAILED RATIONALES/ACTUAL EXAM
QUESTIONS WITH CORRECT ANSWERS — 200 QUESTIONS
Question 1
What was the primary driving force behind the creation of the
Abbreviated Injury Scale (AIS)?
A) The need for a standardized system to categorize injuries resulting
from vehicular accidents
B) The requirement to track hospital billing and reimbursement codes
C) The demand for a physiological scale used by paramedics for field
triage
D) The necessity for a legal framework to determine personal injury
settlements
Correct Answer: A
Rationale: The AIS was born from a need for a standardized system to
categorize injuries resulting from vehicular accidents. It was developed
through a consensus of experts to ensure researchers could compare
injury data across different studies and regions using a common
language.
Question 2
How are injury descriptors organized within the AIS dictionary?
A) Alphabetically by the name of the injury
B) Anatomically by body region
C) By mechanism of injury
D) By the date the injury was first described
,Correct Answer: B
Rationale: The AIS dictionary is organized by body regions (Head, Face,
Neck, Thorax, etc.). This anatomical organization allows coders to
quickly locate specific structures and lesions based on where they occur
in the body.
Question 3
Injury severity in the AIS system is ranked relative to its importance to
which of the following?
A) The specific organ involved
B) The patient's ability to return to work
C) The whole body
D) The likelihood of surgical intervention
Correct Answer: C
Rationale: AIS ranks the severity of an injury based on its impact on the
organism as a whole (the whole body), rather than just the localized
damage to an individual organ or part. This provides a universal
standard for assessing the threat to life.
Question 4
What is the correct numerical ranking of the AIS severity scale?
A) 1 = Minor, 2 = Moderate, 3 = Serious, 4 = Severe, 5 = Critical, 6 =
Maximal
B) 1 = Minor, 2 = Moderate, 3 = Severe, 4 = Critical, 5 = Maximal, 6 =
Fatal
C) 1 = Minor, 2 = Serious, 3 = Moderate, 4 = Severe, 5 = Critical, 6 =
Maximal
D) 1 = Minor, 2 = Moderate, 3 = Serious, 4 = Critical, 5 = Severe, 6 =
Maximal
Correct Answer: A
,Rationale: The AIS severity scale is a 6-point ordinal scale: 1 = Minor, 2 =
Moderate, 3 = Serious, 4 = Severe, 5 = Critical, 6 = Maximal (currently
untreatable).
Question 5
Which of the following is NOT a factor that affects the AIS severity score
of a single injury?
A) The time elapsed since the injury occurred
B) The age of the patient
C) The physiological response of the patient (vital signs)
D) The anatomical location of the injury
Correct Answer: B
Rationale: AIS reflects the severity of individual injuries and is
unaffected by time, the patient's physiological response (vital signs),
and the patient's age. The severity score is based solely on the
anatomical injury itself.
Question 6
How many body regions are used in the Injury Severity Score (ISS)
calculation?
A) 9
B) 6
C) 12
D) 4
Correct Answer: B
Rationale: For ISS calculation, only the highest severity AIS code from
each of the six body regions (head/neck, face, chest, abdomen,
extremities, external) is used.
, Question 7
What is the formula for calculating the Injury Severity Score (ISS)?
A) Sum of the squares of the highest AIS in each of the three most
severely injured body regions (A² + B² + C²)
B) Sum of the AIS scores from all injured body regions
C) Product of the three highest AIS scores
D) Average of the highest AIS scores from each of the six body regions
Correct Answer: A
Rationale: The ISS is calculated as the sum of the squares of the highest
AIS in each of the three most severely injured body regions (A² + B² + C²
= ISS).
Question 8
A patient has the following AIS scores: Head/Neck = 4, Face = 2, Chest =
3, Abdomen = 2, Extremities = 1, External = 1. What is the ISS?
A) 29
B) 30
C) 25
D) 36
Correct Answer: A
Rationale: The three most severely injured body regions are Head/Neck
(4), Chest (3), and Face (2) or Abdomen (2). Using the highest three: 4² +
3² + 2² = 16 + 9 + 4 = 29.
Question 9
What is the maximum possible ISS?
A) 75
B) 66
C) 72
D) 80
WITH CORRECT ANSWERS AND DETAILED RATIONALES/ACTUAL EXAM
QUESTIONS WITH CORRECT ANSWERS — 200 QUESTIONS
Question 1
What was the primary driving force behind the creation of the
Abbreviated Injury Scale (AIS)?
A) The need for a standardized system to categorize injuries resulting
from vehicular accidents
B) The requirement to track hospital billing and reimbursement codes
C) The demand for a physiological scale used by paramedics for field
triage
D) The necessity for a legal framework to determine personal injury
settlements
Correct Answer: A
Rationale: The AIS was born from a need for a standardized system to
categorize injuries resulting from vehicular accidents. It was developed
through a consensus of experts to ensure researchers could compare
injury data across different studies and regions using a common
language.
Question 2
How are injury descriptors organized within the AIS dictionary?
A) Alphabetically by the name of the injury
B) Anatomically by body region
C) By mechanism of injury
D) By the date the injury was first described
,Correct Answer: B
Rationale: The AIS dictionary is organized by body regions (Head, Face,
Neck, Thorax, etc.). This anatomical organization allows coders to
quickly locate specific structures and lesions based on where they occur
in the body.
Question 3
Injury severity in the AIS system is ranked relative to its importance to
which of the following?
A) The specific organ involved
B) The patient's ability to return to work
C) The whole body
D) The likelihood of surgical intervention
Correct Answer: C
Rationale: AIS ranks the severity of an injury based on its impact on the
organism as a whole (the whole body), rather than just the localized
damage to an individual organ or part. This provides a universal
standard for assessing the threat to life.
Question 4
What is the correct numerical ranking of the AIS severity scale?
A) 1 = Minor, 2 = Moderate, 3 = Serious, 4 = Severe, 5 = Critical, 6 =
Maximal
B) 1 = Minor, 2 = Moderate, 3 = Severe, 4 = Critical, 5 = Maximal, 6 =
Fatal
C) 1 = Minor, 2 = Serious, 3 = Moderate, 4 = Severe, 5 = Critical, 6 =
Maximal
D) 1 = Minor, 2 = Moderate, 3 = Serious, 4 = Critical, 5 = Severe, 6 =
Maximal
Correct Answer: A
,Rationale: The AIS severity scale is a 6-point ordinal scale: 1 = Minor, 2 =
Moderate, 3 = Serious, 4 = Severe, 5 = Critical, 6 = Maximal (currently
untreatable).
Question 5
Which of the following is NOT a factor that affects the AIS severity score
of a single injury?
A) The time elapsed since the injury occurred
B) The age of the patient
C) The physiological response of the patient (vital signs)
D) The anatomical location of the injury
Correct Answer: B
Rationale: AIS reflects the severity of individual injuries and is
unaffected by time, the patient's physiological response (vital signs),
and the patient's age. The severity score is based solely on the
anatomical injury itself.
Question 6
How many body regions are used in the Injury Severity Score (ISS)
calculation?
A) 9
B) 6
C) 12
D) 4
Correct Answer: B
Rationale: For ISS calculation, only the highest severity AIS code from
each of the six body regions (head/neck, face, chest, abdomen,
extremities, external) is used.
, Question 7
What is the formula for calculating the Injury Severity Score (ISS)?
A) Sum of the squares of the highest AIS in each of the three most
severely injured body regions (A² + B² + C²)
B) Sum of the AIS scores from all injured body regions
C) Product of the three highest AIS scores
D) Average of the highest AIS scores from each of the six body regions
Correct Answer: A
Rationale: The ISS is calculated as the sum of the squares of the highest
AIS in each of the three most severely injured body regions (A² + B² + C²
= ISS).
Question 8
A patient has the following AIS scores: Head/Neck = 4, Face = 2, Chest =
3, Abdomen = 2, Extremities = 1, External = 1. What is the ISS?
A) 29
B) 30
C) 25
D) 36
Correct Answer: A
Rationale: The three most severely injured body regions are Head/Neck
(4), Chest (3), and Face (2) or Abdomen (2). Using the highest three: 4² +
3² + 2² = 16 + 9 + 4 = 29.
Question 9
What is the maximum possible ISS?
A) 75
B) 66
C) 72
D) 80
