Current evidence of drug-elution therapy for infrapopliteal arterial disease

Table 1 Assessment of amputation risk: wound (W), ischemia (I) and foot infection classification[6,7]

Component	Score	Description
W	0	No ulcer (ischemic rest pain)
	1	Small, shallow ulcer on distal leg or foot without gangrene
	2	Deeper ulcer with exposed bone, joint or tendon ± gangrenous changes limited to toes
	3	Extensive deep ulcer, full thickness heel ulcer ± calcaneal involvement ± extensive gangrene
I		ABI	Ankle pressure (mmHg)	Toe pressure or TcPO2
	0	≥ 0.80	> 100	≥ 60
	1	0.6-0.79	70-100	40-59
	2	0.4-0.59	50-70	30-39
	3	< 0.40	< 50	< 30
FI	0	No symptoms or signs of infection
	1	Local infection involving only skin and subcutaneous tissue
	2	Local infection involving deeper than skin/subcutaneous tissue
	3	Systemic inflammatory response syndrome