MidAtlantic Vascular, LLC Critical Limb Ischemia. P.A.D. Detection, Treatment, and Referral Paul Sasser MD FACS MidAtlantic Vascular, LLC

P.A.D. and Podiatry Podiatrists are positioned to: Recognize the early and advanced signs of P.A.D. Improve lower limb wound healing rates Reduce lower limb amputation rates P.A.D. is routinely seen in the daily practice of podiatrists The feet can reveal the first signs and symptoms of P.A.D. “Podiatric physicians are commonly the first to thoroughly evaluate a patient’s legs and feet regardless of the patient’s reason for a visit.”

Clinical Signs of Limb Ischemia Nonhealing wounds Shiny skin Loss of hair growth Cool skin temperature for one limb but not the other Pale or bluish skin Reduced capillary fill times Pallor on elevation and rubor on dependency

Patient presents with Critical Limb Ischemia- What do we do next? We know our complex patients can have multiple comorbidities with similar and often overlapping signs & symptoms Are we looking for all contributing factors?

Foot Care and P.A.D. Preventative foot care: Daily foot inspection Skin cleansing and moisturizing Appropriate footwear Promptly address skin lesions and ulcers Podiatric care To reduce the risk of ulcers, infection, necrosis, and amputation, high-risk patients should: Perform proper foot care Receive annual foot exams

Classical Diabetic Triad of Pathology PVD Neuropathy Infection

Diabetic Foot and P.A.D. Diabetic foot ulcers: 15%-25% of persons with diabetes develop a foot ulcer 14%-24% of persons with a foot ulcer require amputation Foot ulcers precede 85% of non-traumatic amputations About 50% of all foot ulcers are due to P.A.D. Peripheral neuropathy can accompany P.A.D. in patients with diabetes and lead to: Decreased pain perception Sudden ulcer formation

Multidisciplinary Care of the Diabetic Foot A joint statement from the Society for Vascular Surgery (SVS) and the American Podiatric Medical Association (APMA) specifies that diabetic foot care requires: Vascular assessment and revascularization, if necessary Wound assessment and staging/grading of ischemia and infection Risk monitoring and reduction for reulceration and infection

Limb Ischemia and the Diabetic Foot Critical limb ischemia (CLI) in the diabetic population requires multidisciplinary care Ischemia is one of many factors underlying diabetic foot disease, and leads to: Decreased tissue resilience Impeded wound healing Rapid tissue necrosis Left untreated, CLI results in non-healing wounds and potential amputation

Classical Diabetic Foot Treatment Plan Stop Smoking Exercise Achieve Ideal Body Weight Control Blood Pressure Control Diabetes Antiplatelet Therapy Off-Loading Debridement Infection Management Ischemia Management Control Cholesterol and Triglycerides

P.A.D. and infection lead to a 90 times higher risk of amputation Wound Care and P.A.D. P.A.D. is associated with ulcers that heal slowly or not at all Ulcer management: Local wound care/debridement Infection control Offloading Revascularization Limb salvage procedures Healing requires increasing perfusion beyond the level required for healthy skin P.A.D. and infection lead to a 90 times higher risk of amputation

Guidelines on Wound Care A consensus panel on treating neuropathic diabetic foot ulcers recommends: Vascular evaluation Palpate pulses and take ABI and/or TBI If P.A.D. is suspected, refer for segmental pressure volume, skin perfusion pressure (SPP), and transcutaneous oxygen (TCPO2) measurements If revascularization is considered, refer for vascular consult and angiography

Guidelines on Wound Care Consensus recommendations include P.A.D. management for the treatment of diabetic foot ulcers As part of P.A.D. management, endovascular revascularization is being used increasingly in: Ulcer healing Below-the-knee P.A.D. Small vessels Revascularization is central to wound care and contributes to healing in 90% of patients that receive it expeditiously

Vascular Medical Specialists have long believed in the importance of treating the Whole patient and not just the Hole in the patient

Early Detection of P.A.D. and Disease Outcomes The major goals of early detection are to slow or stop P.A.D. progression to the more advanced stages AND to reduce cardiovascular morbidity and mortality

CLI is a Marker for Death Within three months of presentation CLI: Death in 9% MI in 1% Stroke in 1% Amputation in 12% 1-year Mortality: 21.0% 2-year mortality: 31.6%

A Big Problem: Lesion Assessment Less than half of the patients that eventually received a PRIMARY amputation (49%) had any diagnostic evaluation prior to their amputation! Not even a simple ABI Must go beyond PAD Assessments: Vascular history Physical Examination Non-invasive vascular laboratory Access pulses Arteriography

Endovascular Interventionalists Appropriate Route for Limb Salvage ABI Arterial Duplex Scanning Venous Duplex Scanning with appropriate technologist DPM Gatekeeper Contrast Angiography Endovascular intervention RF Closure Surgical Bypass Amputation only if needed Endovascular Interventionalists

Podiatry and P.A.D. Case Study: Patient presented with a foot ulcer Podiatrist prescribed antibiotics and requested a 2-week follow-up At follow-up, patient was referred for a vascular consult 17 days later Prior to consult, patient developed a necrotic foot Below-the-knee amputation was performed one month after consult Jury awarded patient $1.23 million for not receiving a prompt vascular referral “Medical-legally, we also find ourselves in the position where recognition of P.A.D. and pro-active intervention will not only be expected, but also necessary for better risk management.”

Prognosis & Economic Impact of CLI Critical Limb Ischemia (CLI) is defined as extremity pain at rest or as impending tissue loss that is caused by a severe compromise of blood flow. DX of CLI should be confirmed by ankle-brachial index (ABI) : Ischemic rest pain most commonly occurs below an ankle pressure of 50mm HG or a toe pressure less than 30 mm Revascularization is central to wound care and contributes to healing in 90% of patients that receive it expeditiously

P.A.D. Evaluation P.A.D Patients: 80% are current or former smokers Diabetes is associated with a 21% risk of amputation as compared with 3% in nondiabetic patients Traditional cardiovascular risk factors also play a lesser role: males, age, black race, & hypertension. “Remarkably a recent study showed that only 35% of patients undergoing limb amputation in the U.S. had an ABI documented and only 16% of amputees underwent peripheral angiography”

Clinical Presentation P.A.D. Physical Examination: Dry skin, thickened nails, loss of hair. Coolness to palpation Decreased or absent pulses Pallor or dependent rubor Nonhealing wound or ulcer, especially over bony prominences, and on the plantar surface of the

Clinical Presentation P.A.D. Noninvasive Vascular Laboratory: Ankle-Brachial index < 0.4 or > 1.3 Ankle systolic pressure < 50 mm Hg Toe systolic pressure < 30 mm Hg Transcutaneous oxygen tension < 10 mm HG

CLI “Rule of ¼” For patients with Critical Limb Ischemia, after one year : ¼ Resolution ¼ Ongoing ¼ Require amputation ¼ Dead “One-year CLI outcomes could approximate the following one- fourth rule..”

Be a Proactive Part of the Solution A program to promote: Early identification and diagnosis of CLI by podiatrists Followed by prompt referral to endovascular specialists in your patients’ communities Completed by aggressive wound care and surveillance programs by the health care partners

LE Amputation Impact: Devastating psychological and quality of life issues Survival Perioperative mortality – BKA 5-10% – AKA 15-20% Second amputation required in 30% of cases. Full mobility achieved in 50% of BKA & 25% of AKA

LE Amputation Impact: It is estimated that between 220,000 and 240,000 major and minor lower extremity amputations are performed for CLI in the US and Europe annually Charleston West Virginia, Population 240K

LE Amputation LE Amputation Rate: Despite advances in medical and interventional therapies, the amputation rate has increased from 19 to 30 per 100,000 person/year over the past 2 decades Mainly driven by an increase in diabetes and aging patient populations

LE Amputation Success of Rehabilitation: Below Knee Amputation (BKA) less than two thirds Above Knee Amputation (AKA) less than one half Fewer than 50% of amputees ever achieve full mobility

CLI Economic Impact Expenses, difficult to assess in cost- effectiveness analysis: Home Health Aids Construction & adaptation of home Influence on family Productivity economics Long-term health care costs

CLI Economic Impact- First Line Treatment Recent cost-effectiveness analysis of US Medicare patients – First line treatment: 67% Primary Amputation 23% Surgical Revascularization 10% Percutaneous Revascularization Amputation seems to be over utilized despite being associated with worse patient outcome.

CLI Economic Impact Surgical Revascularization Surgical revascularization for limb salvage: 34% increase in 5-year survival Primary amputation three times more costly than surgical revascularization in both diabetic and non diabetic patients Percutaneous revascularization offers 30-50% improved cost per procedure cost and cost per leg year saved