Injury Severity Score (ISS)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
ISS
About this calculator
The Injury Severity Score (ISS) is a tool for evaluating the severity of injuries, particularly useful in emergency situations. It calculates the severity score of injuries using the severity scores of each affected organ (Abbreviated Injury Scale - AIS) and prioritizing the most severe injury in each body area.
The ISS is used to classify the severity of injuries in patients with multiple injuries. It helps healthcare professionals make quick and informed decisions about treatment and injury management. Additionally, the ISS is useful for evaluating the patient's likelihood of survival.
Note that the ISS is not an automatic diagnosis and should be interpreted in conjunction with the patient's clinical evaluation. Furthermore, the ISS may not be suitable for all situations, especially in patients with complex injuries or injuries affecting multiple organs.
Frequently asked questions
What is ISS and what is it used for?
The ISS is a tool for evaluating the severity of injuries that helps healthcare professionals make quick and informed decisions about treatment and injury management.
When should I use ISS?
ISS is especially useful in emergency situations and in patients with multiple injuries.
Do I need to be a doctor to use ISS?
No, ISS is a tool that can be used by any healthcare professional, as long as they have basic knowledge of the Injury Severity Scale (AIS).
Is ISS reliable?
Yes, ISS is a reliable tool widely used around the world to evaluate the severity of injuries.
Can I calculate ISS anywhere?
Yes, you can calculate ISS anywhere, as long as you have access to a calculator and know how to make the necessary calculations.