Injury Severity Score (ISS) Calculation Formula

Injury severity score (ISS) is the combination of three most severely injured body regions have their score squared.

ISS Calculation Formula = Body Parts [5]2 + Body Parts [4]2 + Body Parts [3]2

• [ ] value can be changed based on the severity of injury.

For example,

Let score the injury,

• No injury = 0
• Minor injury = 1
• Moderate injury = 2
• Serious injury = 3
• Severe injury = 4
• Critical injury = 5
• Untreatable = 6

Now, if the body parts injury like below statement –

• Head and Neck = minor (1)
• Chest = moderate (2)
• Abdomen = Serious (3)
• Leg = Sever (4)
• External = Moderate (2)

Then the Injury severity score will be = (4)2 + (3)2 + (2)2 = 29 points.

Note: Regional injury scores represent Abbreviated Injury Scale scores (AIS).

Related:

• Airway Resistance Calculation Formula
  
• Allowable Blood Loss Calculation Formula