Classification

Asymptomatic (confirmed PAD in an asymptomatic individual)

Claudication

Critical limb ischemia (CLI) [7]

Acute limb ischemia (ALI)

Stage I: asymptomatic

Stage II: pain on exertion

Stage III: pain at rest

Stage IV: necrosis, gangrene

Purpose

• Quantification of disease burden

• Evaluation of the risks and benefits of revascularization procedures

Description

• The following factors are assigned values from 0 (normal) to 3 (severe abnormality):

  • Wound (W): depth and tissue involvement of existing ulcers

  • Ischemia (I): ankle systolic blood pressure and/or tissue oxygenation

  • Foot Infection (fI): local and systemic signs of infection

• The benefit of revascularization and the risk of amputation can be estimated based on the three derived values.