🧠 ELAPSS Score (aneurysm growth risk)
UseSet follow-up imaging intervals and weigh intervention, using growth as a surrogate for rupture.
SourceBackes D, et al. ELAPSS score for prediction of risk of growth of unruptured intracranial aneurysms…
This-shift next steps
After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.
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Methodology · worked example, guidelines & full notes
Size carries the most weight (≥ 10 mm = +22).
When to use
Set follow-up imaging intervals and weigh intervention, using growth as a surrogate for rupture.
How it works
Points from Earlier SAH, Location, Age > 60, Population, Size and Shape (0–40). Higher totals indicate higher 3/5-year growth risk; read exact percentages from the nomogram.
Key points
- Size carries the most weight (≥ 10 mm = +22).
- Total ≥ 12 corresponds to > 10% 5-year growth risk.
- More robust combined with PHASES, wall enhancement and morphology.
References
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.
| Earlier SAH history | No SAH history |
|---|---|
| Location | MCA |
| Age | ≤ 60 y |
| Population | Japanese |
| Maximum aneurysm diameter | 5.0–6.9 mm |
| Shape | Regular |
→ELAPSS total15/40 · Moderate growth risk
- Earlier SAH E：No SAH history +1 (unverified)
- Location L：MCA +3
- Age A：≤ 60 0
| Earlier SAH history | No SAH history |
|---|---|
| Location | ICA |
| Age | ≤ 60 y |
| Population | North America/Europe · China/other (baseline 0) |
| Maximum aneurysm diameter | < 3.0 mm |
| Shape | Regular |
→ELAPSS total1/40 · Lower growth risk
- Earlier SAH E：No SAH history +1 (unverified)
- Location L：ICA 0
- Age A：≤ 60 0
Verification & sources · governance
FAQ
Frequently asked questions
- What are the limits and cautions when using ELAPSS Score (aneurysm growth risk)?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- Does ELAPSS Score (aneurysm growth risk) 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 ELAPSS Score (aneurysm growth risk) calculated in practice? Can you show a worked example?
- Inputs: Earlier SAH history No SAH history, Location MCA, Age ≤ 60 y, Population Japanese, Maximum aneurysm diameter 5.0–6.9 mm, Shape Regular → Result: ELAPSS total 15 /40 · Moderate growth risk（Earlier SAH E: No SAH history +1 (unverified), Location L: MCA +3, Age A: ≤ 60 0） Inputs: Earlier SAH history No SAH history, Location ICA, Age ≤ 60 y, Population North America/Europe · China/other (baseline 0), Maximum aneurysm diameter < 3.0 mm, Shape Regular → Result: ELAPSS total 1 /40 · Lower growth risk（Earlier SAH E: No SAH history +1 (unverified), Location L: ICA 0, Age A: ≤ 60 0）