CAISS Injury Classification & Scoring 5

Question 1

The TRISS methodology combines ISS with which additional variable to estimate probability of survival?

Accepted Answer

Revised Trauma Score (RTS) and patient age

Answer

TRISS uses the ISS, Revised Trauma Score (RTS, derived from GCS, systolic BP, and RR), and patient age to calculate probability of survival.

Question 2

When the mechanism of injury is blunt versus penetrating in TRISS, this distinction affects:

Accepted Answer

The regression coefficients used in the survival probability equation

Answer

TRISS uses separate sets of regression coefficients (b0, b1, b2, b3) for blunt and penetrating mechanisms to reflect their different survival patterns.

Question 3

A patient presents with an open femur fracture (AIS 3), liver laceration grade III (AIS 3), and bilateral pulmonary contusions (AIS 3). What is the NISS?

Accepted Answer

27

Answer

NISS = 3² + 3² + 3² = 9 + 9 + 9 = 27, using the three highest AIS scores regardless of body region.

Question 4

Which AIS edition introduced the current six AIS body regions as the standard framework?

Accepted Answer

AIS 2005

Answer

The AIS 2005 edition, with its 2008 update, established the contemporary standardized body region and coding structure widely used today.

Question 5

A spinal cord injury resulting in complete paraplegia below T6 would most appropriately receive which AIS severity code in the Spine region?

Accepted Answer

AIS 5

Answer

Complete paraplegia is a critical, life-altering injury and is coded AIS 5 (Critical) in the Spine region per AIS guidelines.

(CAISS) Certified Abbreviated Injury Scale Specialist Practice Test

(CAISS) Certified Abbreviated Injury Scale Specialist Practice Test

CAISS Injury Classification & Scoring 5