Management of Non-Healing Toe Wound with Abnormal Toe Pressures

Immediate Assessment and Risk Stratification

The American College of Cardiology recommends that if toe pressure is <30 mmHg, urgent vascular imaging and revascularization should be pursued immediately to prevent amputation and enable wound healing 1
Toe pressure <30 mmHg is associated with major amputation risk and decreased likelihood of wound healing, according to the American College of Cardiology 2
The American College of Cardiology states that this threshold increases the pre-test probability of healing by at least 25% when values are ≥30 mmHg 1
Skin perfusion pressure (SPP) ≥40 mmHg predicts healing potential, as recommended by the American College of Cardiology 1
Transcutaneous oxygen pressure (TcPO2) ≥25 mmHg predicts healing potential, according to the American College of Cardiology 1

Before applying any compression therapy, arterial insufficiency must be ruled out by checking all lower extremity pulses and measuring ankle-brachial index (ABI), as recommended by the American College of Cardiology 3
The American College of Cardiology recommends measuring toe-brachial index (TBI); values ≤0.70 are abnormal, with poor concordance to ABI in CLTI patients 2
Assess Doppler waveforms from pedal arteries; triphasic waveforms largely exclude significant peripheral artery disease (PAD), according to the American College of Cardiology 1

Urgent revascularization pathway is recommended for toe pressure <30 mmHg or TcPO2 <25 mmHg, with consideration of urgent vascular imaging, as stated by the American College of Cardiology 1
Establish direct in-line blood flow to at least one foot artery, preferably the artery supplying the anatomical region of the wound, as recommended by the American Heart Association 1, 4

Endovascular revascularization shows equivalent amputation-free survival compared to surgical bypass, according to the American Heart Association 4
Endovascular procedures are recommended to establish in-line blood flow to the foot in patients with non-healing wounds, as stated by the American Heart Association 4
Surgical bypass is recommended when endovascular treatment has failed or is not technically feasible, according to the American College of Cardiology 5, 10

An interdisciplinary care team must evaluate and provide comprehensive care to achieve complete wound healing, including revascularization, wound care, infection management, offloading, and orthotics, as recommended by the American Heart Association 5, 6
Wound care after revascularization should be performed with the goal of complete wound healing, as limb salvage rate approaches 100% at 3 years when complete healing is achieved, according to the American Heart Association 5

Never apply compression therapy without ruling out arterial insufficiency, as high-compression therapy can cause tissue necrosis and limb loss in patients with arterial disease, as warned by the American College of Cardiology 3
Immediate vascular surgery consultation is required for non-healing wounds with arterial insufficiency, lower extremity gangrene, or signs of acute limb ischemia, as recommended by the American College of Cardiology 3

All patients with ischemic foot ulcers require aggressive cardiovascular risk management, including smoking cessation, hypertension, dyslipidemia, and diabetes control, as recommended by the American Heart Association 1
Patients with CLTI have 22% all-cause mortality rate at 12 months without revascularization, according to the American Heart Association 4

After revascularization, verify achievement of target perfusion parameters (toe pressure ≥30 mmHg, SPP ≥40 mmHg, or TcPO2 ≥25 mmHg), as recommended by the American College of Cardiology 1
Continue multidisciplinary team management as part of comprehensive care plan, and monitor for wound healing progression, as stated by the American College of Cardiology 1