🧠 IMPACT TBI Prognostic Score (Core ± CT ± Lab)
UseWhen to use: adults with moderate–severe TBI when age, motor score and pupils (and optionally CT/labs) are kn…
StrataHigher sums → higher predicted 6-mo mortality and unfavorable GOS; augments clinical judgment.
LimitsWhen not to use: mild TBI pathways or as sole WLST criterion. · Pitfall: applying without documenting motor/pupil reliability. · Official web calculator also at tbi-impact.org.
SourceSteyerberg EW, et al. PLoS Med 2008 (IMPACT)
This-shift next steps
After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.
Paste the link in Slack, Teams, X, or LinkedIn — the preview image comes from this page’s Open Graph card.
Methodology · worked example, guidelines & full notes
Published PLoS Med chart + logits.
When to use
When to use: adults with moderate–severe TBI when age, motor score and pupils (and optionally CT/labs) are known.
How it works
Core points (age + motor + pupils) ± CT/secondary insults ± glucose/Hb per Steyerberg chart; apply published logistics for mortality/unfavorable outcome.
Key points
- Published PLoS Med chart + logits.
- Core / extended / lab tiers.
- Next: CRASH TBI models / neurosurgery pathway.
References
- Steyerberg EW, et al. PLoS Med 2008 (IMPACT)
- tbi-impact.org calculator
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Age | 40–49 (2) |
|---|---|
| GCS motor | Normal flexion (2) |
| Pupillary reactivity | One reacts (2) |
| Model tier | Extended (+ hypoxia/hypotension/CT) |
| Hypoxia (extended/lab) | No (0) |
| Hypotension (extended/lab) | No (0) |
| Marshall CT class (extended/lab) | II (0) |
| Traumatic SAH (extended/lab) | No (0) |
| Epidural hematoma (extended/lab) | No (0) |
| Glucose mmol/L (lab) | 9–11.9 (2) |
| Hb g/dL (lab) | 9–11.9 (2) |
→IMPACT sum (extended)6pts
- Core points：6
- Est. 6-mo mortality：19.1%
- Est. 6-mo unfavorable：39.1%
| Age | ≥ 70 (5) |
|---|---|
| GCS motor | Untestable / missing (3) |
| Pupillary reactivity | None react (4) |
| Model tier | Lab (+ glucose + Hb) |
| Hypoxia (extended/lab) | Yes / suspected (1) |
| Hypotension (extended/lab) | Yes / suspected (2) |
| Marshall CT class (extended/lab) | V/VI (2) |
| Traumatic SAH (extended/lab) | Yes (2) |
| Epidural hematoma (extended/lab) | Yes (−2) |
| Glucose mmol/L (lab) | ≥ 15 (4) |
| Hb g/dL (lab) | ≥ 15 (0) |
→IMPACT sum (lab)21pts
- Core points：12
- Est. 6-mo mortality：75.3%
- Est. 6-mo unfavorable：92.9%
Verification & sources · governance
FAQ
Frequently asked questions
- Does IMPACT TBI Prognostic Score (Core ± CT ± Lab) upload patient data? Where is it calculated?
- Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
- How is IMPACT TBI Prognostic Score (Core ± CT ± Lab) calculated in practice? Can you show a worked example?
- Inputs: Age 40–49 (2), GCS motor Normal flexion (2), Pupillary reactivity One reacts (2), Model tier Extended (+ hypoxia/hypotension/CT), Hypoxia (extended/lab) No (0), Hypotension (extended/lab) No (0), Marshall CT class (extended/lab) II (0), Traumatic SAH (extended/lab) No (0)… → Result: IMPACT sum (extended) 6 pts（Core points: 6, Est. 6-mo mortality: 19.1%, Est. 6-mo unfavorable: 39.1%） Inputs: Age ≥ 70 (5), GCS motor Untestable / missing (3), Pupillary reactivity None react (4), Model tier Lab (+ glucose + Hb), Hypoxia (extended/lab) Yes / suspected (1), Hypotension (extended/lab) Yes / suspected (2), Marshall CT class (extended/lab) V/VI (2), Traumatic SAH (extended/lab) Yes (2)… → Result: IMPACT sum (lab) 21 pts（Core points: 12, Est. 6-mo mortality: 75.3%, Est. 6-mo unfavorable: 92.9%）