Critical Limb Ischemia (CLI) is the most advanced and dangerous stage of peripheral artery disease. It occurs when blood flow to the leg drops below the level needed to keep tissues alive. Without urgent intervention, the outcome is amputation — or death.

How Is CLI Different from PAD?

Peripheral artery disease (PAD) is a spectrum. CLI is the tipping point: pain persists even at rest, tissues begin dying, and the amputation rate without treatment exceeds 40% within six months.

Symptoms of Critical Limb Ischemia

  • Rest Pain: Burning or throbbing foot pain that worsens at night and eases when the leg is dangled downward
  • Non-healing Ulcers: Wounds on the heel or toes that remain open for weeks despite treatment
  • Black Toes (Gangrene): Tissue death due to complete loss of blood flow
  • Severe Cold Foot: With pallor or bluish discolouration of the skin

⚠️ CLI Is a Vascular Emergency — Every Day Counts

If your foot hurts at rest, or you have a wound that won't heal after two weeks or more, this is a vascular emergency. Delay turns a straightforward decision into an amputation. Contact a vascular surgeon immediately.

Risk Factors: The Dangerous Triad

  • Diabetes: Accelerates arterial hardening and dulls sensation, delaying wound detection
  • Smoking: Directly constricts arteries and speeds atherosclerosis
  • High Blood Pressure and Cholesterol: Promote plaque build-up in arteries
  • Chronic kidney disease and advanced age are additional multipliers

How Is CLI Diagnosed?

  1. Ankle-Brachial Index (ABI): ABI below 0.4 strongly suggests CLI
  2. Arterial Duplex Ultrasound: Identifies the location and extent of blockage
  3. CT Angiography (CTA): Detailed anatomical map for planning intervention
  4. Catheter Angiography: In some cases immediately before treatment

Treatment Options

  • Balloon Angioplasty and Stenting: Opens the blockage via catheter without major incisions — first choice in most cases
  • Bypass Grafting: Routes blood around a blocked segment for complex cases
  • Limited Amputation: Saves the rest of the limb when gangrene is localised

✅ Limb Salvage Rates

In specialised vascular centres, 70–80% of early CLI cases can be treated with endovascular techniques to preserve the limb. The earlier the diagnosis, the better the outcome.

Foot Pain at Rest? Don't Wait

Book an urgent consultation with Dr. Mohamed Haggag — vascular surgery specialist in Heliopolis, Cairo — to assess your condition and save your limb

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