Medically reviewed by Dr. Tom Biernacki, DPM
Board-certified podiatric surgeon | Balance Foot & Ankle, Howell & Bloomfield Township, MI
Last reviewed: May 2026
| ABI (Ankle-Brachial Index) | Interpretation | Symptoms | Management |
|---|---|---|---|
| >1.40 | Non-compressible (calcified) — false normal | May have severe PAD masked | Toe-brachial index (TBI) for accurate assessment |
| 1.00-1.40 | Normal | None or atypical | Cardiovascular risk factor modification |
| 0.91-0.99 | Borderline | Mild or none | Risk factor modification; repeat ABI in 1 year |
| 0.71-0.90 | Mild PAD | Claudication with vigorous activity | Supervised exercise; antiplatelet therapy; statin |
| 0.41-0.70 | Moderate PAD | Claudication with moderate activity; rest pain possible | Vascular surgery referral; revascularization evaluation |
| <0.40 | Severe / Critical Limb Ischemia | Rest pain; non-healing wounds; gangrene risk | Urgent vascular surgery; revascularization or amputation |
| Foot Sign | PAD Significance | Podiatric Action |
|---|---|---|
| Absent or diminished pedal pulses (DP/PT) | Suggests reduced arterial inflow | ABI measurement; vascular referral if ABI <0.90 |
| Non-healing wound or ulcer | Ischemic wound (insufficient oxygen for healing) | Urgent vascular assessment; avoid debridement until perfusion confirmed |
| Dependent rubor / pallor on elevation | Severely reduced perfusion reserve | Emergency vascular evaluation |
| Cool, hairless, shiny skin on foot/leg | Chronic ischemia; trophic changes | ABI + toe pressure; protective footwear; avoid trauma |
| Cyanotic or black toes | Digital ischemia; possible gangrene | Same-day vascular surgery consult |
| Slow capillary refill (>3 seconds) | Reduced perfusion to distal digits | Confirm with ABI; expedite vascular care |
Quick answer: Peripheral Artery Disease Foot Signs Risks Care is a clinical condition that responds to evidence-based treatment when caught early. Symptoms include pain, swelling, and altered function. Diagnosis requires clinical exam, often imaging. Treatment ladder: conservative care first (4-6 weeks), then targeted interventions if needed. Call (810) 206-1402.
Medically Reviewed | Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle, Michigan
Peripheral artery disease (PAD) is hardening and narrowing of the arteries supplying the legs and feet, reducing blood flow and impairing the foot’s ability to heal. It is one of the most important conditions podiatrists screen for because PAD fundamentally changes what treatments are safe and what foot problems are likely to occur.
How PAD Develops
The same atherosclerotic process that affects the coronary arteries also affects the peripheral arteries. Risk factors are the same: smoking (the strongest modifiable risk factor), diabetes, hypertension, hypercholesterolemia, family history, and age. PAD is significantly underdiagnosed — many patients have no symptoms until the disease is advanced.
How PAD Presents in the Foot
Intermittent claudication: Reproducible calf, thigh, or buttock pain with walking a predictable distance, relieved by resting. The distance before pain onset shortens as the disease progresses. Claudication indicates moderate PAD — concerning but not immediately limb-threatening.
Rest pain: Ischemic pain at rest, typically in the feet and toes, that is worse with leg elevation (the classic sign: sleeping with the foot hanging off the bed for relief). Rest pain indicates severe ischemia — urgent vascular referral is needed.
Tissue loss: Non-healing ulcers, particularly on the tips of toes, lateral malleolus, or heel. Punched-out, pale-based wounds with little granulation tissue. Dry gangrene (blackened, desiccated tissue) in the most severe cases.
Physical examination signs: Absent or diminished pedal pulses (dorsalis pedis, posterior tibial), dependent rubor (red-purple foot when dependent, blanches with elevation), prolonged capillary refill, cool skin, and shiny atrophic skin with sparse hair on the dorsum of the foot.
The Ankle-Brachial Index (ABI)
The ABI is a non-invasive vascular screening test performed in a podiatry or vascular office. Blood pressure is measured at the ankle (dorsalis pedis or posterior tibial artery) and brachial artery. The ratio is the ABI. Normal is ≥0.9. An ABI below 0.7 indicates significant PAD; below 0.5 indicates severe ischemia; above 1.3 suggests calcified, non-compressible vessels (common in diabetics — toe pressures are more reliable in these patients).
Why PAD Matters for Podiatric Care
PAD contraindicates aggressive debridement of wounds without vascular optimization. It means corns and calluses must be debrided very conservatively. It means foot surgery carries substantially higher healing risk. It means even a minor ingrown toenail treatment must be planned with vascular status in mind. Podiatrists routinely screen for PAD with pulse examination and ABI so that care is appropriately tailored — and so that vascular surgery referral happens before a limb-threatening wound develops.
Dr. Tom's Product Recommendations
Protective Footwear for PAD Patients
Propet Stability Walker Shoe (Extra Depth, Wide Width)
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Extra-depth, wide-width walking shoe — reduces peak pressure on the ischemic foot and accommodates diabetic insoles.
PAD with intact skin — preventive pressure reduction; diabetic patients with PAD
Active wounds or severe ischemia — needs vascular evaluation before footwear changes
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Dr. Tom Biernacki’s Recommendation
I check pedal pulses on every new patient. It takes 10 seconds and tells me something critical about what treatments are safe and what risks exist. A patient with absent pulses gets a very different treatment plan from one with normal vascular exam — and potentially a vascular surgery referral that saves their leg.
— Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle
Frequently Asked Questions
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Dr. Tom’s Clinic-Recommended Products
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In-Office Treatment at Balance Foot & Ankle
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NCBI: Peripheral Artery Disease — Foot & Ankle Symptoms
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Dr. Tom Biernacki, DPM is a board-certified foot & ankle surgeon (ABFAS & ABPM) at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has made him one of the most-followed foot & ankle educators on YouTube.