Management of Diabetics with Peripheral Vascular Disease

Introduction to Vascular Specialist Involvement

The American College of Cardiology recommends that diabetics with peripheral vascular disease be evaluated and managed by a vascular specialist as part of a multidisciplinary care team, particularly when chronic limb-threatening ischemia or foot ulceration is present 1
Before any major amputation is considered, evaluation by a multispecialty care team that includes vascular specialists is required, except in cases of life-threatening sepsis 1

Up to 50% of diabetic patients with foot ulcers have peripheral arterial disease, making vascular assessment critical before amputation decisions 2, 3
Revascularization should always be considered and discussed in a multidisciplinary diabetic foot team before major amputation 2, 3
Patients with chronic limb-threatening ischemia must be evaluated by a multispecialty care team to assess all revascularization and therapeutic options with the goal of preserving a functional limb 1

The multispecialty care team should include vascular specialists skilled in both endovascular and surgical revascularization techniques, as recommended by the American College of Cardiology and the American Heart Association 1, 4
The team requires vascular medical and surgical specialists, podiatrists or orthopedic surgeons, wound care specialists, endocrinologists, and infectious disease specialists when infection is present 1, 4, 5

Patients with peripheral arterial disease and foot infection are at particularly high risk for major limb amputation and require urgent treatment by a vascular team, according to the European Heart Journal 6
Specific triggers for immediate vascular specialist involvement include chronic limb-threatening ischemia, severe perfusion deficits, diabetic foot ulcers with significant ischemia, poor wound healing response, and acute limb ischemia 1, 6, 7, 8

Revascularization improves outcomes by minimizing tissue loss, healing wounds, relieving pain, and preserving functional limbs when feasible, as reported by the Journal of the American College of Cardiology 1
Complex decision-making is required to determine the optimal revascularization strategy, which should be based on anatomical distribution of peripheral arterial disease, availability of autogenous vein, patient comorbidities, and local expertise, according to the Diabetes/Metabolism Research and Reviews 6
Improved limb salvage rates are achieved after revascularization, with most studies reporting limb salvage rates of 80-85% and ulcer healing in >60% at 12 months, compared to approximately 50% limb salvage at 1 year without revascularization, as reported by the Diabetes/Metabolism Research and Reviews 6

Initial screening can be performed in primary care settings, and all diabetic patients with foot ulcers require palpation of foot pulses, hand-held Doppler evaluation of flow signals, ankle-brachial index measurement, and toe-brachial index if diagnostic uncertainty exists, as recommended by the European Heart Journal 2, 3, 9
An ankle-brachial index <0.90 is diagnostic for peripheral arterial disease and warrants vascular specialist referral, particularly if symptoms are present, according to the European Heart Journal 9

All diabetic patients with peripheral arterial disease are at very high cardiovascular risk and require aggressive risk factor modification by the care team, including LDL-C reduction by ≥50% from baseline with goal <1.4 mmol/L, antiplatelet therapy, blood pressure control, and smoking cessation support, as recommended by the European Heart Journal and the European Society of Cardiology 7, 9

The American College of Cardiology recommends urgent arterial revascularization within 24 hours for patients with diabetic foot ulcers and PAD, as the presence of both conditions confers a nearly 3-fold higher risk of leg amputation compared to either condition alone 10, 11, 12, 13
The primary goal of revascularization is to restore direct pulsatile flow to at least one foot artery, preferably the artery supplying the anatomical region of the osteomyelitis, with expected limb salvage rates of 80-85% and ulcer healing in >60% at 12 months 10, 11
For severely infected ischemic feet, revascularization should be performed early rather than delaying for prolonged antibiotic therapy, as this increases amputation risk 14

The Infectious Diseases Society of America recommends careful debridement of necrotic infected material, which should not be delayed while awaiting revascularization, and optimal management may require combined, multiple, or staged procedures 14
Deep soft-tissue infection typically requires prompt surgical drainage, and the surgeon should continue observing the patient until infection is controlled and the wound is healing 12, 13, 14

The American College of Cardiology recommends immediate referral to an interdisciplinary care team, including a vascular surgeon, interventional radiologist or cardiologist, infectious disease specialist, podiatric or orthopedic surgeon, and wound care specialist, for optimal management of diabetic foot ulcers with PAD 12, 13

The American Diabetes Association recommends optimizing blood glucose control to facilitate wound healing, with target HbA1c individualized based on comorbidities 10, 11
The American Heart Association recommends aggressive cardiovascular risk management, including statin therapy, antiplatelet therapy, blood pressure control, and smoking cessation support, for patients with diabetes, foot ulcer, and PAD, who have a 50% mortality rate at 5 years 10, 11

The American College of Cardiology recommends biannual foot examination by a clinician for ongoing surveillance, and monitoring for signs of reinfection, wound deterioration, or loss of perfusion 12, 13

The American College of Cardiology recommends perioperative cardiac monitoring, continuation of cardiovascular medications, and consideration of cardiology consultation for perioperative risk stratification, for patients with preserved cardiac function undergoing revascularization procedures 10, 11

The Infectious Diseases Society of America recommends that urgent amputation is rarely required except when there is extensive necrosis or life-threatening infection, and before any major amputation, a multispecialty care team evaluation is required, and all revascularization options must be discussed 14