Arterial Ulcer

What Is an Arterial Ulcer?

An arterial ulcer, also referred to as an arterial insufficiency ulcer or ischemic ulcer, is a severe breakdown of the skin and underlying tissue caused by reduced arterial blood flow. Arteries are responsible for carrying oxygen- and nutrient-rich blood from the heart to the rest of the body. When blood vessels in the legs or feet become narrowed, stiff, or obstructed—most commonly due to peripheral artery disease (PAD)—the tissue suffers from chronic ischemia (lack of blood supply). Deprived of vital oxygen, skin cells die, minor scrapes fail to heal, and painful ulcers develop.

Signs and Symptoms of an Arterial Ulcer

Arterial ulcers have distinct clinical characteristics that distinguish them from other types of chronic sores, such as venous stasis ulcers or diabetic foot ulcers:

• Appearance: The wounds typically have sharp, well-defined margins with a "punched-out" look. The wound bed is often pale, gray, or yellow, and may be covered with dry, dark eschar rather than healthy pink tissue.
• Drainage: These wounds usually produce minimal to no drainage because of the lack of fluid circulating in the area.
• Location: They most frequently occur on distal extremities where blood flow is most compromised, such as the tips of the toes, between the toes, over the heels, or along the outer ankle.
• Pain: Arterial ulcers are notoriously painful. The discomfort often worsens at night or when the legs are elevated, because gravity can no longer assist arterial flow. Patients frequently find temporary relief by dangling their legs over the edge of the bed.
• Surrounding Skin: The limb may feel cool to the touch and appear pale, shiny, or hairless, with thickened toenails and weak or absent pulses.

Causes and Risk Factors

The primary cause of arterial ulcers is advanced atherosclerosis, a condition where fatty plaques build up inside the arteries. Key risk factors that contribute to arterial disease and ulcer development include:

• Tobacco use or a history of smoking
• Diabetes mellitus
• High blood pressure (hypertension)
• High cholesterol (hyperlipidemia)
• Advanced age
• A sedentary lifestyle or family history of cardiovascular disease

Evaluation and Diagnosis

Accurate diagnosis begins with a comprehensive physical examination. A wound care specialist evaluates the pulses in the feet and inspects the skin's color and capillary refill. Non-invasive vascular studies, such as the ankle-brachial index (ABI) or arterial Doppler ultrasound, are often performed to measure the extent of arterial obstruction. Determining whether an ulcer is primarily arterial is critical, as therapies that help venous wounds—such as high-level compression—can be dangerous if applied to a severely ischemic limb.

Treatment Approaches

Healing an arterial ulcer requires a coordinated plan focused on restoring circulation, protecting delicate tissues, and preventing infection:

• Vascular Revascularization: The most critical step in managing arterial ulcers is addressing the underlying blood flow deficit. A vascular specialist may perform procedures such as angioplasty, stenting, or surgical bypass to restore arterial perfusion.
• Specialized Wound Care: While stable, dry eschar on an ischemic foot is often kept clean and dry until blood flow can be restored, infected or non-viable tissue may require cautious intervention such as sharp debridement once perfusion is established.
• Advanced Modalities: For appropriate candidates, hyperbaric oxygen therapy may be incorporated into the care plan to super-saturate ischemic tissues with oxygen, promoting cellular repair. Once a healthy wound base is established, advanced graft placements can help accelerate closure.
• Convenient Care Delivery: Anchor Wound Management provides comprehensive clinical care at our Plano clinic as well as mobile bedside wound care for homebound patients throughout the Dallas-Fort Worth metroplex.

When to Seek Immediate Care

Because arterial ulcers stem from compromised circulation, they carry a high risk of rapid tissue deterioration and severe infection. You should seek prompt medical evaluation if you notice a sore on your foot or leg that does not heal, sudden discoloration (such as black or dark purple skin), spreading redness, foul odor, or sudden, severe pain.