CAISS EXAM CERTIFICATION EXAM VERSION A LATEST 2026-
2027 ACTUAL EXAM WITH 410 QUESTION AND CORRECT
DETAILED ANSWERS WITH RATIONALES(VERIFIED
ANSWERS)ALREADY GRADED A.
Italics in the AIS dictionary indicate what?
A) Proper-named injuries and structures, and OIS grades
B) Synonyms and non-clinical terms
C) Inclusive or exclusive information
D) AIS coding rules and conventions
Correct Answer: A
Rationale
Italics in the Abbreviated Injury Scale (AIS) dictionary are used for proper-named
anatomical structures or injuries, and for Organ Injury Scale (OIS) grades. Proper-
named injuries include conditions such as "Battle's sign" or "Raccoon eyes," while
proper-named anatomical structures include specific bones or vessels. The use of
italics helps coders quickly identify these specific terms. Option B, synonyms and
non-clinical terms, are indicated by parentheses. Option C, inclusive or exclusive
information, is indicated by brackets. Option D, AIS coding rules and conventions,
is indicated by boxed and bold text.
Does the AIS assess the severity of multiple injuries?
A) No, it assesses single injury severity only
B) Yes, it assesses multiple injuries simultaneously
C) Yes, but only for trauma patients
D) No, it only assesses mortality risk
,Correct Answer: A
Rationale
The Abbreviated Injury Scale (AIS) assesses the severity of single injuries only.
Each injury is assigned an individual AIS code based on its anatomical location and
severity. The Injury Severity Score (ISS), which is derived from AIS codes, is used to
assess multiple injuries by combining the highest AIS scores from different body
regions. Option B is incorrect because the AIS does not assess multiple injuries as
a whole. Option C is partially correct but not the primary distinction. Option D is
incorrect because the AIS assesses anatomical severity, not mortality risk directly.
The Injury Severity Score (ISS) is defined as:
A) The sum of the squares of the highest AIS in each of the three most severely
injured ISS body regions
B) The sum of the highest AIS in each of the six ISS body regions
C) The average of all AIS scores in all body regions
D) The highest single AIS score multiplied by three
Correct Answer: A
Rationale
The Injury Severity Score (ISS) is calculated as the sum of the squares of the
highest AIS codes in each of the three most severely injured ISS body regions. This
formula (ISS = A1² + A2² + A3²) provides a numerical score ranging from 1 to 75
that correlates with mortality risk. Option B is incorrect because only the three
highest-scoring regions are used, not all six. Option C is incorrect because the ISS
is not an average. Option D is incorrect because the ISS is not simply the highest
AIS multiplied by three.
What are the six body regions used in the ISS?
,A) Head and neck, Face, Chest, Abdomen and pelvic organs, Extremities and
pelvis, External
B) Head, Neck, Thorax, Abdomen, Extremities, Skin
C) Cranial, Facial, Thoracic, Abdominal, Pelvic, Peripheral
D) Neurologic, Respiratory, Cardiovascular, Abdominal, Musculoskeletal,
Integumentary
Correct Answer: A
Rationale
The six ISS body regions are: (1) Head and Neck, (2) Face, (3) Chest, (4) Abdomen
and Pelvic Organs, (5) Extremities and Pelvis, and (6) External. These regions are
used to categorize injuries for the calculation of the Injury Severity Score. Option B
is incorrect because it omits the Face region and uses incorrect terminology.
Option C is incorrect because it uses different terminology. Option D is incorrect
because it uses a functional classification rather than the anatomical regions used
in the ISS.
Asphyxia is assigned to which ISS region?
A) Head and Neck
B) Chest
C) External
D) Abdomen and Pelvic Organs
Correct Answer: A
Rationale
Asphyxia is assigned to the Head and Neck ISS body region. Asphyxia results from
oxygen deprivation, which primarily affects the brain and neurological function,
making the Head and Neck region the appropriate classification. Option B, Chest,
is incorrect; drowning is assigned to the Chest region. Option C, External, is
incorrect; external injuries include burns, lacerations, and contusions. Option D,
, Abdomen and Pelvic Organs, is incorrect; lumbar spine lesions are assigned to this
region.
Drowning is assigned to which ISS region?
A) Head and Neck
B) Chest
C) External
D) Abdomen and Pelvic Organs
Correct Answer: B
Rationale
Drowning is assigned to the Chest ISS body region. Drowning results in respiratory
compromise and pulmonary injury, which affects the chest region. Option A, Head
and Neck, is incorrect; asphyxia is assigned to this region. Option C, External, is
incorrect; external injuries include burns, lacerations, and contusions. Option D,
Abdomen and Pelvic Organs, is incorrect; lumbar spine lesions are assigned to this
region.
Lumbar spine lesions would be assigned to which ISS region?
A) Head and Neck
B) Chest
C) Abdomen and Pelvic Organs
D) Extremities and Pelvis
Correct Answer: C
Rationale
Lumbar spine lesions are assigned to the Abdomen and Pelvic Organs ISS body
region. The lumbar spine is anatomically located in the abdominal region, and
injuries to the lumbar vertebrae are coded in this region. Option A, Head and
2027 ACTUAL EXAM WITH 410 QUESTION AND CORRECT
DETAILED ANSWERS WITH RATIONALES(VERIFIED
ANSWERS)ALREADY GRADED A.
Italics in the AIS dictionary indicate what?
A) Proper-named injuries and structures, and OIS grades
B) Synonyms and non-clinical terms
C) Inclusive or exclusive information
D) AIS coding rules and conventions
Correct Answer: A
Rationale
Italics in the Abbreviated Injury Scale (AIS) dictionary are used for proper-named
anatomical structures or injuries, and for Organ Injury Scale (OIS) grades. Proper-
named injuries include conditions such as "Battle's sign" or "Raccoon eyes," while
proper-named anatomical structures include specific bones or vessels. The use of
italics helps coders quickly identify these specific terms. Option B, synonyms and
non-clinical terms, are indicated by parentheses. Option C, inclusive or exclusive
information, is indicated by brackets. Option D, AIS coding rules and conventions,
is indicated by boxed and bold text.
Does the AIS assess the severity of multiple injuries?
A) No, it assesses single injury severity only
B) Yes, it assesses multiple injuries simultaneously
C) Yes, but only for trauma patients
D) No, it only assesses mortality risk
,Correct Answer: A
Rationale
The Abbreviated Injury Scale (AIS) assesses the severity of single injuries only.
Each injury is assigned an individual AIS code based on its anatomical location and
severity. The Injury Severity Score (ISS), which is derived from AIS codes, is used to
assess multiple injuries by combining the highest AIS scores from different body
regions. Option B is incorrect because the AIS does not assess multiple injuries as
a whole. Option C is partially correct but not the primary distinction. Option D is
incorrect because the AIS assesses anatomical severity, not mortality risk directly.
The Injury Severity Score (ISS) is defined as:
A) The sum of the squares of the highest AIS in each of the three most severely
injured ISS body regions
B) The sum of the highest AIS in each of the six ISS body regions
C) The average of all AIS scores in all body regions
D) The highest single AIS score multiplied by three
Correct Answer: A
Rationale
The Injury Severity Score (ISS) is calculated as the sum of the squares of the
highest AIS codes in each of the three most severely injured ISS body regions. This
formula (ISS = A1² + A2² + A3²) provides a numerical score ranging from 1 to 75
that correlates with mortality risk. Option B is incorrect because only the three
highest-scoring regions are used, not all six. Option C is incorrect because the ISS
is not an average. Option D is incorrect because the ISS is not simply the highest
AIS multiplied by three.
What are the six body regions used in the ISS?
,A) Head and neck, Face, Chest, Abdomen and pelvic organs, Extremities and
pelvis, External
B) Head, Neck, Thorax, Abdomen, Extremities, Skin
C) Cranial, Facial, Thoracic, Abdominal, Pelvic, Peripheral
D) Neurologic, Respiratory, Cardiovascular, Abdominal, Musculoskeletal,
Integumentary
Correct Answer: A
Rationale
The six ISS body regions are: (1) Head and Neck, (2) Face, (3) Chest, (4) Abdomen
and Pelvic Organs, (5) Extremities and Pelvis, and (6) External. These regions are
used to categorize injuries for the calculation of the Injury Severity Score. Option B
is incorrect because it omits the Face region and uses incorrect terminology.
Option C is incorrect because it uses different terminology. Option D is incorrect
because it uses a functional classification rather than the anatomical regions used
in the ISS.
Asphyxia is assigned to which ISS region?
A) Head and Neck
B) Chest
C) External
D) Abdomen and Pelvic Organs
Correct Answer: A
Rationale
Asphyxia is assigned to the Head and Neck ISS body region. Asphyxia results from
oxygen deprivation, which primarily affects the brain and neurological function,
making the Head and Neck region the appropriate classification. Option B, Chest,
is incorrect; drowning is assigned to the Chest region. Option C, External, is
incorrect; external injuries include burns, lacerations, and contusions. Option D,
, Abdomen and Pelvic Organs, is incorrect; lumbar spine lesions are assigned to this
region.
Drowning is assigned to which ISS region?
A) Head and Neck
B) Chest
C) External
D) Abdomen and Pelvic Organs
Correct Answer: B
Rationale
Drowning is assigned to the Chest ISS body region. Drowning results in respiratory
compromise and pulmonary injury, which affects the chest region. Option A, Head
and Neck, is incorrect; asphyxia is assigned to this region. Option C, External, is
incorrect; external injuries include burns, lacerations, and contusions. Option D,
Abdomen and Pelvic Organs, is incorrect; lumbar spine lesions are assigned to this
region.
Lumbar spine lesions would be assigned to which ISS region?
A) Head and Neck
B) Chest
C) Abdomen and Pelvic Organs
D) Extremities and Pelvis
Correct Answer: C
Rationale
Lumbar spine lesions are assigned to the Abdomen and Pelvic Organs ISS body
region. The lumbar spine is anatomically located in the abdominal region, and
injuries to the lumbar vertebrae are coded in this region. Option A, Head and
