Diabetic Foot & Limb Salvage

Diabetic foot care aims to control infection, remove pressure, restore blood flow where possible and preserve a functional limb.

Neuropathy and pressure

Reduced sensation means trauma, heat injury or pressure from footwear can go unnoticed. Changes in foot shape concentrate pressure over particular points and cause recurrent ulceration at the same sites.

Poor circulation

Peripheral arterial disease reduces oxygen delivery and impairs healing. In diabetes it often affects the arteries below the knee, and neuropathy can mask the usual warning pain, so severe disease may be silent until a wound appears.

Infection

An ulcer gives bacteria a route into soft tissue, joints and bone. Infection in a diabetic foot can spread rapidly, sometimes within days.

Seek review promptly, on the same day where possible, for any of the following in a diabetic foot:

• A new blister, ulcer or break in the skin
• Redness, swelling, discharge or odour
• Colour change or a black area of tissue
• Increasing pain, or new pain in a foot that is usually numb
• Fever or feeling unwell with any foot wound

Because neuropathy blunts pain, a diabetic foot wound is often more serious than it feels. Rapidly spreading infection, fever with a discoloured foot or sudden severe deterioration warrants emergency assessment via Triple Zero (000) or the nearest emergency department.

Vascular and foot examination

Assessment covers pulses and Doppler signals, skin and wound examination (depth, infection, exposed structures), sensation testing, pressure points and footwear, and glucose control. Blood tests, X-rays or MRI are added when bone infection (osteomyelitis) is suspected.

Vascular imaging

Ankle and toe pressure measurements, duplex ultrasound and CT angiography establish whether circulation is adequate for healing and whether revascularisation is possible. Angiography is generally reserved for planning or performing revascularisation.

Limb salvage is a team effort, coordinating vascular surgery with podiatry, wound care nursing, infectious diseases, endocrinology and, where needed, orthopaedic and plastic surgery.

Wound care and offloading

Treatment may include debridement of dead tissue, specialised dressings and devices that take pressure off the wound. Podiatry and orthotic input are often essential and continue well after healing.

Antibiotics and infection control

Antibiotics are chosen according to infection severity and culture results. Abscesses, infected bone or dead tissue may require surgical drainage or removal; antibiotics alone cannot sterilise dead tissue.

Restoring blood flow

Angioplasty, stenting, endarterectomy or bypass surgery can improve circulation, planned wherever possible around the specific arteries supplying the wound. Open, endovascular and hybrid approaches are all used; the choice depends on anatomy, urgency, durability and the patient's fitness, not simply on which is least invasive.

Minor and major amputation

Removing a toe or a limited part of the foot may be necessary when tissue cannot be saved, and often allows the rest of the foot to heal. Major amputation is considered only when infection or tissue loss is so extensive that reconstruction cannot provide a useful, healing limb. The constant objective is to preserve as much function as safely possible.

Without timely treatment, infection and ischaemia can progress to gangrene, sepsis or limb loss; early referral and restoration of blood flow where feasible materially improve the outlook. After healing, surveillance continues: review of the feet, the revascularisation and the other leg, with repeat imaging as needed. Any new wound or colour change should trigger contact with the team straight away.

Preventing recurrence

Daily foot checks, protective footwear, regular podiatry, good diabetes control, smoking cessation and prompt review of any new skin damage all reduce the risk of another ulcer. Cardiovascular risk factors (blood pressure, cholesterol, kidney health) are managed at the same time, because diabetic foot disease signals arterial risk elsewhere.

The first practical priority is to establish whether the wound has enough blood supply to heal and whether infection, pressure or dead tissue requires immediate treatment. A diabetic foot ulcer may appear small while extending deeply, and reduced sensation means pain is not a reliable measure of severity.

Limb salvage usually depends on several treatments working together rather than one procedure alone. Patients should understand who is coordinating vascular assessment, infection treatment, wound care, podiatry, offloading and diabetes management, and who to contact if the wound changes between appointments. Revascularisation may improve the conditions for healing, but it does not replace pressure relief or infection control.

Bring details of recent antibiotics, dressings, scans, blood tests and footwear or offloading devices to the consultation. Daily inspection of both feet remains essential after healing because recurrence is common. New redness, discharge, odour, colour change, black tissue, fever or a rapidly worsening wound should prompt urgent medical review rather than waiting for the next scheduled appointment.

Yarra Vascular Surgeons provides urgent assessment of the diabetic foot, open and endovascular revascularisation and surgical infection control, working within a multidisciplinary limb salvage model alongside podiatry, endocrinology and infectious diseases colleagues.

A diabetic foot wound can deteriorate quickly when infection, pressure and poor arterial circulation occur together. Yarra Vascular Surgeons provides urgent vascular assessment, imaging and open or endovascular revascularisation as part of coordinated limb-salvage care. Early intervention can improve blood supply for healing, control infection and preserve as much functional tissue as safely possible.