Stage I – Asymptomatic. Of note: Fontaine stage I does in fact describe patients who are for the most part asymptomatic. Careful history may actually reveal subtle and non-specific symptoms such as paresthesias. Physical examination may reveal cold extremities and other signs of “subclinical” peripheral artery disease. More examples include bruits over blood vessels and lack of normal pulses.
Stage II – Intermittent claudication. This stage takes into account the fact that patients usually have a very constant distance at which they have pain:
- Stage IIa – Intermittent claudication after more than 200 meters of pain free walking.
- Stage IIb – Intermittent claudication after less than 200 meters of walking
Stave IV – Ischemic ulcers or gangrene (which may be dry or humid).
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