CAISS Injury Severity Scoring 2

Question 1

The Injury Severity Score (ISS) is derived from which scoring system?

Accepted Answer

Abbreviated Injury Scale

Answer

The ISS is calculated using the three highest AIS scores from different body regions.

Question 2

What is the maximum possible Injury Severity Score?

Accepted Answer

75

Answer

The maximum ISS is 75, achieved when all three contributing AIS scores are 5 (5²+5²+5²=75).

Question 3

A patient has AIS scores of 3, 4, and 2 in three different body regions. What is the ISS?

Accepted Answer

29

Answer

ISS = 3² + 4² + 2² = 9 + 16 + 4 = 29.

Question 4

Which ISS threshold is most commonly used to define 'major trauma'?

Accepted Answer

15

Answer

An ISS ≥ 15 is the most widely accepted threshold for defining major or severe trauma.

Question 5

An AIS severity code of 6 indicates which outcome?

Accepted Answer

Unsurvivable injury

Answer

AIS 6 represents an unsurvivable injury, such as decapitation or destruction of a vital structure.

(CAISS) Certified Abbreviated Injury Scale Specialist Practice Test