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Categorias
Reescritas a partir da fonte e citadas
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Category 0, asymptomatic
Asymptomatic chronic lower-limb ischemia; no claudication, rest pain or tissue loss. Disease may be detectable only objectively (e.g. reduced ankle-brachial index) without functional symptoms.
CondutaRisk-factor modification only: smoking cessation, statin and antiplatelet therapy, control of diabetes/hypertension. No revascularization indicated for the asymptomatic state.
RiscoBenign limb prognosis; only about 1-3% of claudicants per year progress to critical limb-threatening ischemia, and asymptomatic disease progresses even more slowly. Cardiovascular (MI/stroke) risk drives overall mortality.
verificadoClassification of chronic limb ischemia (Fontaine and Rutherford)Wikipedia 'Peripheral artery disease', Classification section (Rutherford category 0, 'asymptomatic'); management and progression rate from StatPearls 'Peripheral Arterial Disease' (NBK430745), Treatment and Prognosis sections (lifestyle/medical first-line; '1% to 3% per year progress to critical limb ischemia').
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Category 1, mild claudication
Mild intermittent claudication: reproducible ischemic muscle pain on exertion that does not markedly limit walking. Corresponds clinically to mild PAD (ankle-brachial index roughly 0.70-0.90).
CondutaFirst-line conservative therapy: supervised exercise/walking program, smoking cessation and pharmacologic risk-factor control (statin, antiplatelet); cilostazol may improve walking distance.
RiscoStable claudication carries a low limb-loss risk; roughly 1-3% of claudicants per year progress to critical limb ischemia. Major risk is cardiovascular mortality, not amputation.
verificadoClassification of chronic limb ischemia (Fontaine and Rutherford)Wikipedia 'Peripheral artery disease', Classification section (category 1, 'mild claudication'); ABI band, conservative therapy and progression rate from StatPearls NBK430745 (mild PAD ABI 0.70-0.90; first-line lifestyle/exercise/pharmacologic; 1-3%/yr to CLI).
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Category 2, moderate claudication
Moderate intermittent claudication: exertional ischemic limb pain of intermediate severity, between categories 1 and 3. Corresponds clinically to moderate PAD (ankle-brachial index roughly 0.50-0.70).
CondutaSupervised exercise therapy and medical risk-factor optimization remain first-line; endovascular or surgical revascularization is reserved for lifestyle-limiting symptoms refractory to conservative measures.
RiscoLow annual risk of progression to limb-threatening ischemia (about 1-3% per year); prognosis dominated by concurrent coronary/cerebrovascular disease.
verificadoClassification of chronic limb ischemia (Fontaine and Rutherford)Wikipedia 'Peripheral artery disease', Classification section (category 2, 'moderate claudication'); moderate-PAD ABI band and management/progression from StatPearls NBK430745 (ABI 0.50-0.70; exercise first-line, revascularization for refractory cases).
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Category 3, severe claudication
Severe intermittent claudication: markedly walking-limiting exertional ischemic pain that does not yet occur at rest. Most severe claudication grade before the critical-ischemia categories.
CondutaConservative therapy continues, but lifestyle-limiting severe claudication refractory to exercise/medical therapy is an indication for revascularization (endovascular angioplasty/stenting or bypass surgery).
RiscoStill primarily a quality-of-life rather than limb-threat problem; overall progression of claudication to critical limb ischemia remains roughly 1-3% per year.
verificadoClassification of chronic limb ischemia (Fontaine and Rutherford)Wikipedia 'Peripheral artery disease', Classification section (category 3, 'severe claudication'); revascularization-for-refractory-claudication and progression rate from StatPearls NBK430745 (endovascular/bypass for refractory disease).
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Category 4, rest pain
Ischemic rest pain: continuous pain at rest from inadequate perfusion, classically in the forefoot/toes, worse when supine and relieved by dependency. Marks the onset of chronic limb-threatening ischemia (ankle-brachial index typically under 0.50; low ankle/toe pressures).
CondutaLimb-threatening ischemia: urgent revascularization (endovascular or surgical bypass) to relieve pain and salvage the limb, with aggressive risk-factor and wound/foot care; medical therapy alone is insufficient.
RiscoChronic limb-threatening ischemia carries a high amputation risk of roughly 25-40% at 1 year together with markedly elevated cardiovascular mortality.
verificadoClassification of chronic limb ischemia (Fontaine and Rutherford)Wikipedia 'Peripheral artery disease', Classification section (category 4, 'rest pain'); CLTI threshold, revascularization need and amputation risk from StatPearls NBK430745 (ABI <0.50 = severe PAD/CLTI; 'risk of amputation is about 25% to 40% at 1 year').
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Category 5, minor tissue loss
Minor tissue loss: ischemic ulceration or focal gangrene limited to the digits/forefoot, not extending beyond a non-healing toe ulcer. A form of chronic limb-threatening ischemia.
CondutaLimb-threatening ischemia requiring prompt revascularization for wound healing and limb salvage, combined with local wound care/debridement, infection control and risk-factor optimization.
RiscoLimb-threatening ischemia with high 1-year amputation risk (about 25-40%) and high cardiovascular mortality; tissue loss further worsens limb prognosis versus rest pain alone.
verificadoClassification of chronic limb ischemia (Fontaine and Rutherford)Wikipedia 'Peripheral artery disease', Classification section (category 5, 'minor tissue loss; ischemic ulceration not exceeding ulcer of the digits'); CLTI management and 1-year amputation risk from StatPearls NBK430745.
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Category 6, major tissue loss
Major tissue loss: extensive ischemic ulceration or frank gangrene extending above the transmetatarsal level, beyond salvageable digits, often with non-viable foot tissue. The most advanced category of chronic limb-threatening ischemia.
CondutaUrgent revascularization for any salvageable tissue, but extensive necrosis often necessitates major (below- or above-knee) amputation; aggressive infection control and risk-factor management throughout.
RiscoWorst limb prognosis with the highest likelihood of major amputation (overall CLTI amputation risk about 25-40% at 1 year, greatest with extensive tissue loss) and very high cardiovascular mortality.
verificadoClassification of chronic limb ischemia (Fontaine and Rutherford)Wikipedia 'Peripheral artery disease', Classification section (category 6, 'major tissue loss; severe ischemic ulcers or frank gangrene'); CLTI management and amputation risk from StatPearls NBK430745.