Diabetes is the leading cause of non-traumatic lower limb amputation worldwide. However, with prompt vascular surgical intervention, up to 75% of threatened diabetic limbs can be saved. The key is recognizing the warning signs early and acting before irreversible ischemia sets in.

How Does Diabetes Affect the Feet?

Diabetes damages the feet through two distinct mechanisms that often co-exist:

  • Peripheral Neuropathy: Nerve damage causes loss of protective sensation — patients cannot feel pain, heat or injury, leading to unnoticed wounds that deteriorate silently
  • Peripheral Arterial Disease (PAD): Accelerated arterial narrowing reduces blood flow to the foot, impairing wound healing and increasing infection risk

Warning Signs That Need Urgent Assessment

  • Any non-healing wound on the foot or lower leg lasting more than 2 weeks
  • Blackening or darkening of the toes (early gangrene)
  • Rest pain — pain in the foot at night, relieved by hanging the leg out of bed
  • Cold, pale or mottled foot compared to the other side
  • Spreading redness, swelling or fever (suggests deep infection)

⚠️ Do Not Wait

A diabetic foot with critical ischemia is a vascular emergency. Every day without revascularization reduces the chance of limb salvage. If in doubt, seek vascular surgical assessment immediately.

Vascular Assessment

  • Ankle-Brachial Index (ABI): Simple bedside test — values below 0.9 indicate PAD
  • Arterial Duplex Ultrasound: Maps the diseased arteries non-invasively
  • CT Angiography (CTA): Detailed roadmap of all lower limb arteries for surgical planning
  • Digital Subtraction Angiography: Gold standard, performed during catheter intervention

Revascularization Options

  • Balloon Angioplasty & Stenting: Catheter-based — the least invasive option, suitable for focal arterial narrowings
  • Bypass Surgery: Surgical bypass using vein or synthetic graft to route blood around blocked arteries — for long-segment occlusions
  • Hybrid Procedures: Combining catheter and open techniques in the same session for complex multilevel disease

✅ Limb Salvage Rate

With timely revascularization, wound care and infection control, 70–80% of patients with critical limb ischemia avoid major amputation. The goal is always to save the maximum amount of functional foot.

Concerned About a Diabetic Foot Wound?

Contact Dr. Mohamed Haggag urgently for a specialist vascular assessment — early intervention saves limbs

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