The Prognostic Value of the WIFI Classification system (wound, ischemia and foot infection) to predict limb salvage in patients with Chronic Limb Threatening Ischaemia

Abstract

he Society for Vascular Surgery Lower Extremity Threatened Limb (SVS WIFI) classification system has three components: Wound, Ischemia and Foot Infection. Each component is graded on a spectrum from 0 (none) to 1 (mild) to 2 (moderate) to 3 (severe) based on grades assigned to each of the three individual components, a WIFI class is assigned. Each Class is categorized to certain stage:  Stage 1: Amputation risk: very low  Stage 2: Amputation risk: low  Stage 3: Amputation risk: moderate  Stage 4: Amputation risk: high  Stage 5: Unsalvageable foot The Society for Vascular Surgery WIFI system is intended for any patient with a diabetic foot ulcer, non-healing foot ulcer present for two or more weeks, foot/lower extremity gangrene, or ischemic rest pain. It is not meant for patients with acute ischemia, emboli, trauma, non-atherosclerotic diseases such as vasospastic disorders, or pure venous ulcers.