CAISS Injury Severity Scoring 3

Question 1

How many body regions does the AIS/ISS system recognize for ISS calculation?

Accepted Answer

6

Answer

ISS uses six body regions: head/neck, face, chest, abdomen, extremities/pelvis, and external.

Question 2

A patient with an isolated splenic laceration coded AIS 4 and no other injuries would have an ISS of:

Accepted Answer

16

Answer

With only one injury, ISS = 4² = 16; the other two terms are zero.

Question 3

Which body region in the ISS framework includes pelvic ring fractures?

Accepted Answer

Extremities/Pelvis bony

Answer

Pelvic ring fractures are classified under the Extremities/Pelvis bony region in ISS coding.

Question 4

Probability of survival (Ps) in trauma scoring is most directly calculated using:

Accepted Answer

Revised Trauma Score and ISS combined (TRISS)

Answer

TRISS combines the Revised Trauma Score (physiologic) and ISS (anatomic) to estimate survival probability.

Question 5

In AIS coding, which descriptor best defines an AIS 3 injury?

Accepted Answer

Serious

Answer

AIS 3 is defined as 'serious' on the severity scale from 1 (minor) to 6 (unsurvivable).

(CAISS) Certified Abbreviated Injury Scale Specialist Practice Test