🧠 Spetzler-Martin AVM Grade
UseEstimate microsurgical morbidity/mortality risk and support treatment selection.
SourceSpetzler RF, Martin NA. A proposed grading system for arteriovenous malformations. J Neurosurg 1986
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
Higher grades favor radiosurgery/embolization or observation.
When to use
Estimate microsurgical morbidity/mortality risk and support treatment selection.
How it works
Grade = size (1–3) + eloquence (0–1) + deep venous drainage (0–1). I–II low surgical risk, III intermediate, IV–V high risk.
Key points
- Higher grades favor radiosurgery/embolization or observation.
- Eloquent areas include motor/sensory/language/visual cortex, thalamus, internal capsule, brainstem and cerebellar peduncles.
- The Lawton-Young supplementary score can refine decisions.
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.
| AVM maximum diameter | Medium 3–6 cm (2) |
|---|---|
| Adjacent eloquent brain | Non-eloquent (0) |
| Venous drainage | Superficial only (0) |
→S-M grade2
- Components：size + eloquence + deep venous drainage
| AVM maximum diameter | Small < 3 cm (1) |
|---|---|
| Adjacent eloquent brain | Non-eloquent (0) |
| Venous drainage | Superficial only (0) |
→S-M grade1
- Components：size + eloquence + deep venous drainage
Verification & sources · governance
FAQ
Frequently asked questions
- What are the limits and cautions when using Spetzler-Martin AVM Grade?
- 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 Spetzler-Martin AVM Grade 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 Spetzler-Martin AVM Grade calculated in practice? Can you show a worked example?
- Inputs: AVM maximum diameter Medium 3–6 cm (2), Adjacent eloquent brain Non-eloquent (0), Venous drainage Superficial only (0) → Result: S-M grade 2（Components: size + eloquence + deep venous drainage） Inputs: AVM maximum diameter Small < 3 cm (1), Adjacent eloquent brain Non-eloquent (0), Venous drainage Superficial only (0) → Result: S-M grade 1（Components: size + eloquence + deep venous drainage）