What is critical limb ischaemia?
Critical limb-threatening ischaemia is the most advanced stage of peripheral arterial disease. Blood supply has fallen below what the tissues need even without exertion, so pain appears at rest — characteristically in the forefoot at night — and any break in the skin fails to heal.
Time matters. Without restored circulation, a significant proportion of affected limbs progress to major amputation within a year. With timely revascularisation, wound care and risk-factor treatment, many limbs are salvaged and remain functional.
Symptoms to watch for
- Persistent pain in the forefoot or toes at rest, worse lying flat and at night
- Relief from hanging the foot over the edge of the bed
- Ulcers on the toes, heel or foot that do not heal over weeks
- Black or dry gangrenous areas on the toes
- Cold, pale or mottled foot with absent pulses
- Foot that turns dusky red when lowered and pale when raised
When to seek urgent care
Rest pain, a new black area on the foot or a spreading, foul-smelling foot infection needs urgent vascular assessment — within hours, not weeks.
How it is diagnosed
Investigation is chosen to answer a specific question rather than as a blanket screen. For critical limb ischaemia that usually means:
- Urgent vascular assessment with pulse examination and ankle-brachial index
- Toe pressures and transcutaneous oxygen where calf vessels are calcified
- Arterial duplex ultrasound and CT or MR angiography to map targets for bypass or angioplasty
- Wound assessment, tissue sampling and imaging for underlying bone infection
- Cardiac and diabetes assessment before intervention
Treatment options at Siva Sakthi
Which of these applies to you depends on what the assessment shows. The options are discussed with you, including what each involves and what recovery looks like.
- Urgent revascularisationRestoring inline flow to the foot is the priority, by endovascular angioplasty and stenting or by surgical bypass, chosen on the anatomy of the blockage.
- Hybrid proceduresOpen and endovascular techniques are combined in one sitting where disease spans several levels.
- Wound debridement and infection controlDead tissue is removed and infection treated alongside restoring blood supply — neither works without the other.
- Minor amputation and reconstructionWhere a toe or forefoot segment is already lost, limited amputation with a healed, functional foot is the goal.
- Pain control and medical therapyAntiplatelet and lipid-lowering treatment, diabetes control and analgesia support healing and reduce cardiovascular risk.
- SurveillanceRegular duplex follow-up detects a failing graft or restenosis before the limb is threatened again.
Common questions
In many patients, yes — if blood flow is restored in time and infection is controlled. Outcomes depend on the pattern of arterial disease, the extent of tissue loss and how early treatment begins, so no result can be guaranteed.
Neither is universally better. Angioplasty suits shorter lesions and patients less fit for surgery; bypass gives durable flow across long occlusions when a suitable vein is available. The angiogram guides the choice.
Rest pain and tissue loss rarely improve on their own. Delay increases the extent of tissue lost and the likelihood of major amputation.
Book a consultation in Guntur
Critical Limb Ischemia is assessed and treated by Dr. Vijay Kumar Vishnumolakala, MS, MCh, at our Kothapeta clinic. Request an appointment or call +91 00000 00000.