In January 2014, the Society for Vascular Surgery published its new threatened limb classification system based on Wound extent, degree of Ischemia and foot Infection (WIfI). This classification represents a summary of multiple previously published classifications focused on diabetic foot ulcers and pure ischaemia or infection models. Despite the new system, patient-centred functional outcomes — such as wound healing or maintenance of ambulation — remain incompletely evaluated in this population. By and large, doctors who are using the WIfI classification will report mainly on the risk of amputation and benefit of revascularisation at 1 year, but will not report about patient survival or the probability of ulcers healing.
