Management of Non-Healing Lower Extremity Wound with Hardware

Immediate Priorities

The American College of Cardiology recommends measuring ankle-brachial index (ABI), palpating pedal pulses, and obtaining toe pressures and transcutaneous oxygen pressure (TcPO2) immediately to assess for critical limb-threatening ischemia (CLTI) in patients with a history of smoking, which significantly increases the risk of peripheral artery disease 1, 2
Critical thresholds requiring urgent vascular intervention include ABI <0.5, ankle pressure <50 mmHg, toe pressure <30 mmHg, or TcPO2 <25 mmHg, as recommended by the American College of Cardiology 2
Revascularization must precede or occur concurrently with wound healing efforts, as inadequate perfusion prevents healing regardless of other interventions, according to the American College of Cardiology and Circulation 1, 3, 2

The Infectious Diseases Society of America recommends switching from oral to parenteral antibiotics immediately for severe infections, as virtually all severe infections and many moderate infections require IV therapy, at least initially 4, 5
Empiric broad-spectrum coverage should target both gram-positive organisms (including MRSA) and gram-negative bacteria, particularly given prior antibiotic failure, as recommended by the Infectious Diseases Society of America 4, 5
Continue antibiotics for 2-4 weeks for moderate to severe soft tissue infections, depending on adequacy of debridement and wound vascularity, according to the Infectious Diseases Society of America 4, 5

The American College of Cardiology recommends coordinating care through an interdisciplinary team including vascular surgery, infectious disease, wound care specialists, and potentially orthopedic surgery for hardware evaluation 1, 3, 2
Perform serial sharp debridement of all nonviable tissue and callus at each visit, as recommended by the American College of Cardiology and the Infectious Diseases Society of America 1, 4, 5

The American College of Cardiology recommends smoking cessation as mandatory and non-negotiable, as smoking profoundly impairs wound healing through vasoconstriction and tissue hypoxia 1
Optimize glycemic control if diabetic (target HbA1c <7%), as recommended by the American College of Cardiology and the American Diabetes Association 1, 2

Perform wound reassessment at least weekly to evaluate healing progress, identify signs of biofilm or persistent infection, and adjust treatment accordingly, as recommended by the American College of Cardiology and the Infectious Diseases Society of America 1, 2
Monitor for systemic signs of worsening infection including fever, tachycardia, or spreading erythema, according to the Infectious Diseases Society of America 4, 6

The American Heart Association/American College of Cardiology (AHA/ACC) guidelines demonstrate that Negative Pressure Wound Therapy (NPWT) is helpful to achieve wound healing after revascularization and minor amputation when primary closure is not feasible, with one study showing 100% limb salvage at 3 years when complete wound healing was achieved 7, 8
NPWT should be strongly considered for deeper wounds, especially after debridement, to accelerate healing and promote granulation tissue formation, as recommended by the AHA/ACC guidelines 7, 8
Intermittent pneumatic compression devices may be considered to augment wound healing in refractory cases, with potential benefit in decreased amputation rates and improved quality of life 7, 8, 9
Hyperbaric oxygen therapy effectiveness is unknown, with limited evidence showing decreased ulcer area at 6 weeks but no significant differences in complete healing or amputation rates 8, 9

An interdisciplinary care team should evaluate and provide comprehensive care to achieve complete wound healing, including wound care specialists, infectious disease, vascular surgery, and potentially plastic surgery for complex wounds 7, 8, 10
The team should include functions such as wound care, infection management, orthotics, and prosthetics, as recommended by the AHA/ACC guidelines 7, 8, 10