SVS WIfI Limb-Threat Classification
SVS WIfI limb-threat classification: Wound, Ischemia and foot Infection grades (0-3 each) mapped to the clinical stage 1-4 amputation risk (Mills 2014).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Wound (W) grade
- Grade 2
- Ischemia (I) grade
- Grade 3
- foot Infection (fI) grade
- Grade 1
Result: WIfI W2 I3 fI1 = clinical stage 4: high 1-year amputation risk.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Grades
- Wound 0-3, Ischemia 0-3 (by ABI / ankle / toe pressure), foot Infection 0-3.
- Stage
- the W/I/fI triple reads to clinical stage 1-4 (very low / low / moderate / high 1-year amputation risk) per the expert-panel table. Cross-links rutherford-fontaine, abi.
What you enter
- Wound (W) grade
- Ischemia (I) grade
- foot Infection (fI) grade
How this is calculated
Mills JL Sr, Conte MS, Armstrong DG, et al. The Society for Vascular Surgery Lower Extremity Threatened Limb Classification System: risk stratification based on Wound, Ischemia, and foot Infection (WIfI). J Vasc Surg. 2014;59(1):220-234. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.