CAISS Trauma Documentation 3 — Questions and Answers
Question 1: Which scoring system uses the three highest AIS scores from different body regions to calculate overall injury severity?
- GCS
- ISS (Correct answer)
- RTS
- TRISS
Correct answer: ISS
The Injury Severity Score (ISS) sums the squares of the three highest AIS scores from three different body regions.
Question 2: In AIS coding, what does the sixth digit of a full AIS injury code represent?
- Body region
- Type of anatomy
- Specific structure
- AIS severity score (Correct answer)
Correct answer: AIS severity score
The sixth digit of the AIS predot code represents the AIS severity score ranging from 1 to 6.
Question 3: A patient has diffuse axonal injury (DAI) documented on imaging. Under which AIS body region is this coded?
- Spine
- Head (Correct answer)
- External
- Thorax
Correct answer: Head
Diffuse axonal injury is a brain injury and is coded under the Head body region in the AIS.
Question 4: What AIS code is assigned to injuries that are considered 'unsurvivable'?
- AIS 4
- AIS 5
- AIS 6 (Correct answer)
- AIS 9
Correct answer: AIS 6
AIS 6 denotes an unsurvivable injury and represents the maximum severity on the AIS scale.
Question 5: When documenting open versus closed fractures in AIS, why does this distinction matter?
- Open fractures are always coded higher than closed fractures
- The distinction determines which body region to assign
- Open fractures may carry a higher AIS code due to greater tissue disruption (Correct answer)
- Closed fractures are not coded in AIS
Correct answer: Open fractures may carry a higher AIS code due to greater tissue disruption
Open fractures involve skin disruption and greater soft tissue damage, which can result in a higher AIS severity code than a comparable closed fracture.
Question 6: Which AIS body region would a traumatic pneumothorax be coded under?
- Abdomen
- Spine
- Thorax (Correct answer)
- External
Correct answer: Thorax
A pneumothorax is a lung/pleural injury and is coded under the Thorax body region in the AIS.
Question 7: In trauma documentation, what does 'AIS 9' signify?
- Fatal injury
- Unsurvivable injury
- Injury severity unknown (Correct answer)
- Maximum survivable injury
Correct answer: Injury severity unknown
AIS 9 is a special code indicating that the severity of an injury is unknown or unspecified.
CAISS Trauma Documentation 3
Which scoring system uses the three highest AIS scores from different body regions to calculate overall injury severity?