Mills et al reported the Society for Vascular Surgery Lower Extremity Threatened Limb Classification System. This consists of 3 components, one of which is a foot infection grade. The authors are from the University of Arizona, the University of California San Francisco, St. Elizabeth's Medical Center (Brighton, Mass), the University of Massachusetts, George Washington University and Valley Presbyterian Medical Center (Van Nuys).
Patient selection: peripheral arterial disease of a lower extremity
Signs of local infection - 2 or more of the following: