Critical<unk><unk>  is diagnosed by the presence of<unk>  rest pain, and an ulcers that will not heal or gangrene due to insufficient blood flow. Insufficient blood flow may be confirmed by ankle-brachial index (ABI), ankle pressure, toe-brachial index (TBI), toe systolic pressure, transcutaneous oxygen measurement (TcPo2 ), or skin perfusion pressure (SPP). Other factors which may point to a diagnosis of critical<unk><unk>  are a Buerger's angle of less than 20 degrees during Buerger's test, a capillary refill of more than 15 seconds or diminished or absent pulses. Critical<unk><unk>  is different from acute<unk><unk> . Acute<unk><unk>  is a sudden lack of blood flow to the<unk> , for example caused by an embolus whereas critical<unk><unk>  is a late sign of a progressive chronic disease.
Chronic limb threatening ischemia
Arterial insufficiency ulcer
Diabetic foot ulcer
Acute limb ischaemia
Chronic venous insufficiency
Vein graft failure
Chronic wound
Diabetic foot