Saving a diabetic foot begins with restoring blood flow

India is often referred to as the diabetes capital of the world. With more than 100 million people living with diabetes, the conversation around the disease has rightly focused on preventing heart attacks, kidney failure, blindness and stroke. Yet one of its most devastating complications continues to receive far less attention, the diabetic foot. Every year, thousands of Indians lose a foot or a leg because what began as a small blister, a minor cut or a seemingly harmless ulcer gradually progressed into a limb-threatening condition.

The tragedy is that many of these amputations are preventable

For decades, diabetic foot ulcers have largely been viewed as wound care problems requiring dressings, antibiotics and local treatment. While infection certainly plays an important role, it is often only one part of the problem. The underlying issue, and frequently the most neglected one, is poor blood circulation. Unless blood flow is restored, even the most advanced wound care techniques have limited success. Saving a diabetic foot often begins not with dressing the wound, but with restoring the blood supply.

When a small wound becomes a major problem

For most people, a small cut on the foot heals naturally within a few days. In a person living with diabetes, the situation can be very different. Persistently elevated blood sugar damages nerves and blood vessels over time. Loss of sensation means patients may not even realise they have sustained an injury. A blister caused by an ill-fitting shoe, a crack in the heel or a small puncture from walking barefoot may go unnoticed for days.

At the same time, diabetes gradually narrows the arteries supplying blood to the feet. Reduced blood flow means less oxygen and fewer nutrients reach the damaged tissue. The body’s natural healing process slows dramatically, allowing even minor injuries to progress into chronic ulcers. Once infection sets in, the situation deteriorates rapidly.

This combination of nerve damage, poor circulation and infection makes diabetic foot disease one of the most challenging complications of diabetes.

The missing

piece: Blood flow

One of the most common misconceptions surrounding diabetic foot ulcers is that infection alone is responsible for delayed healing. While antibiotics are essential when infection is present, they cannot overcome the consequences of inadequate blood supply.

An infected wound without sufficient circulation is like trying to irrigate a field through a blocked canal. No matter how effective the treatment, healing remains incomplete if oxygen-rich blood cannot reach the affected tissues.

Unfortunately, this crucial aspect is often overlooked. Patients undergo repeated dressings for weeks or months, receive multiple courses of antibiotics and sometimes even minor surgical procedures, yet the wound refuses to heal. By the time vascular disease is recognised, tissue damage may have become extensive.

Every diabetic foot ulcer should therefore raise an important question: Is enough blood reaching the foot?

Why amputations continue despite medical advances

Lower-limb amputation is not merely a surgical procedure; it is a life-changing event. It affects mobility, independence, employment, mental health and family wellbeing. For elderly patients, major amputation is also associated with significantly higher long-term mortality.

Yet many amputations occur not because treatment options are unavailable, but because patients are referred too late.

Delayed recognition of poor circulation remains one of the biggest barriers to limb preservation. Many patients reach vascular specialists only after gangrene has developed or infection has spread extensively. At this stage, treatment becomes far more complex and, in some cases, amputation is the only safe option.

Modern medicine has dramatically improved our ability to save limbs. The challenge today is ensuring that patients receive timely vascular evaluation before irreversible damage occurs.

Looking beyond the wound

A diabetic foot ulcer should never be viewed in isolation. It is often a visible sign of advanced vascular disease affecting the arteries of the lower limbs. Patients with Peripheral Arterial Disease also face a significantly increased risk of heart attack and stroke because the same process of atherosclerosis affects blood vessels throughout the body.

This is why evaluation of a diabetic foot extends beyond examining the wound itself. Careful assessment of foot pulses, Doppler ultrasound, Ankle-Brachial Index and vascular imaging help determine whether blood flow is adequate for healing.

Identifying reduced circulation early not only improves the chances of limb salvage but also provides an opportunity to address cardiovascular risk before more serious complications develop.

Modern limb salvage has changed the outlook

The encouraging news is that vascular surgery has undergone a remarkable transformation over the past two decades.

Today, many blocked arteries can be reopened through minimally invasive endovascular procedures using balloons, drug-coated technologies, stents and specialised catheters. These techniques restore blood flow with minimal discomfort, shorter hospital stays and faster recovery.

For patients with extensive arterial disease, vascular bypass surgery continues to provide excellent outcomes when performed at the appropriate stage.

Combined with effective infection control, advanced wound management, pressure offloading, diabetes optimisation and rehabilitation, these procedures have significantly improved limb salvage rates across the world.

Saving a limb today requires much more than surgery, it requires coordinated, multidisciplinary care.

A team approach saves more limbs

Managing diabetic foot disease is rarely the responsibility of a single specialist. Successful treatment depends on close collaboration between diabetologists, vascular surgeons, podiatrists, wound care specialists, infectious disease physicians, orthopaedic surgeons, plastic surgeons, rehabilitation experts and trained nursing teams.

Countries that have established dedicated diabetic foot clinics have demonstrated substantial reductions in major amputations through coordinated care pathways and early referral systems.

India now needs to expand such integrated models across both public and private healthcare systems.

Every hospital managing diabetes should have clear referral pathways for vascular assessment. Every diabetic patient with a non-healing ulcer should have access to timely evaluation of blood circulation before amputation is considered.

A national public health priority

As India’s diabetes burden continues to grow, diabetic foot disease will become an even greater healthcare challenge unless awareness improves. Public education must emphasise regular foot examinations, proper footwear, daily self-inspection and early medical consultation for even minor injuries. Equally important is educating healthcare providers that persistent ulcers are not merely wound care problems but may represent underlying vascular disease requiring urgent intervention.

As Past President of Vascular Society of India and of World Federation of Vascular Societies, I believe reducing diabetes-related amputations should become a national healthcare priority. Advances in vascular surgery have given us the ability to save limbs that would once have been lost. The next step is ensuring patients reach specialised care before the disease reaches an irreversible stage.

Every diabetic foot tells a story. Sometimes it is a story of a neglected wound. More often, it is the story of compromised blood flow that has remained undiagnosed for far too long.

If we change the way we approach diabetic foot disease, from treating wounds alone to restoring circulation, we can prevent thousands of avoidable amputations every year.

Because in diabetic foot care, saving the foot almost always begins with saving the blood flow.