Injury Severity Score + Revised Trauma Score
Injury Severity Score (sum of squares of the three highest AIS region scores; any AIS 6 forces ISS 75, >= 16 is major trauma) alongside the Revised Trauma Score computed from GCS, systolic BP, and respiratory rate (0-7.84).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Highest AIS region
- 4
- 2nd highest AIS region
- 3
- 3rd highest AIS region
- 2
- Glasgow Coma Scale
- 14
- Systolic BP
- 120 mmHg
- Respiratory rate
- 18 /min
Result: ISS 29 (major trauma, >=16); RTS 7.84.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- ISS >=16
- Defines major (severe) trauma.
- ISS <16
- Below the major-trauma threshold.
What you enter
- Highest AIS region (0-6)
- 2nd highest AIS region (0-6)
- 3rd highest AIS region (0-6)
- Glasgow Coma Scale (3-15)
- Systolic BP
- Respiratory rate
How this is calculated
Baker SP, et al. J Trauma. 1974;14(3):187-196 (ISS); Champion HR, et al. J Trauma. 1989;29(5):623-629 (RTS). ISS = sum of squares of the 3 highest AIS; >=16 = major trauma. Read the sources: Baker 1974 ↗, Champion 1989 ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.