Compression therapy in mixed ulcers increases venous output and arterial perfusion

Area of Science:

• Vascular Surgery
• Dermatology
• Wound Care

Background:

• Leg ulcers often result from mixed arterial and venous etiologies, requiring effective management strategies.
• Determining optimal compression pressures is crucial for safe and effective treatment of these complex wounds.

Purpose of the Study:

• To define safe and effective bandage pressures for treating leg ulcers with mixed arterial-venous causes.
• To evaluate the impact of inelastic bandages at varying pressures on arterial perfusion and venous hemodynamics.

Main Methods:

• 25 patients with mixed-etiology leg ulcers were treated with inelastic bandages at 20-30, 31-40, and 41-50 mm Hg.
• Measurements included laser Doppler fluxmetry (LDF), transcutaneous oxygen pressure (TcPo(2)), toe pressure, and venous ejection fraction (EF).
• Safety assessments were performed before and after bandage application.

Main Results:

• Inelastic bandages up to 40 mm Hg increased LDF under the bandage and moderately increased toe pressure and TcPo(2), indicating no arterial perfusion restriction.
• Bandage pressures of 21-30 mm Hg and 31-40 mm Hg significantly improved venous ejection fraction by 72% and 103%, respectively.
• Bandage pressure exceeding 41 mm Hg resulted in a significant decrease in toe-level flux.

Conclusions:

• Inelastic compression up to 40 mm Hg is safe for patients with mixed leg ulcers (ABI >0.5, ankle pressure >60 mm Hg).
• This pressure range effectively normalizes venous pumping function without compromising arterial perfusion.
• Inelastic bandages combined with walking exercises are recommended as foundational conservative management for mixed leg ulcers.