Wound, Ischemia, Foot Infection (WIfI) Classification System - Calculator WIFI Classification – Diabetic Foot Risk Tool WIFI Classification Tool Wound Grade (W): W0 – No ulcer W1 – Small shallow ulcer W2 – Deeper ulcer exposing tendon or joint W3 – Extensive ulcer, gangrene, deep tissue involvement Ischemia Grade (I): I0 – ABI ≥ 0.8, toe pressure ≥ 60 mmHg I1 – Mild ischemia (ABI 0.6–0.79) I2 – Moderate ischemia (ABI 0.4–0.59) I3 – Severe ischemia (ABI < 0.4) Foot Infection Grade (F): F0 – Non-infected F1 – Mild (< 2 cm cellulitis) F2 – Moderate (> 2 cm cellulitis / pus) F3 – Severe (systemic response / sepsis) Calculate Stage and Recommendation
