Fontaine classification

What is the Fontaine classification?

The Fontaine classification is a widely used classification system for lower extremity ischemia. It describes four stages based on signs and symptoms.

  • • Stage 1 is asymptomatic disease.
  • • Stage 2a is intermittent claudication when walking more than 200 m.
  • • Stage 2b is intermittent claudication when walking less than 200 m.
  • • Stage 3 is rest pain.
  • • Stage 4 is tissue necrosis or gangrene.
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