Venous Insufficiency

Understanding Venous Insufficiency

Chronic venous insufficiency — CVI — is a condition in which the valves within the leg veins fail to close properly, allowing blood to pool in the lower leg rather than returning efficiently to the heart. The veins of the leg contain one-way valves that prevent the backflow of blood against gravity during standing and walking. When these valves are damaged — from prior deep vein thrombosis, prolonged standing, pregnancy, obesity, or simply age-related degeneration — blood accumulates in the lower extremity veins under elevated pressure. This venous hypertension produces the characteristic features of CVI.

The most visible early sign is persistent ankle and lower leg swelling — edema that worsens throughout the day with upright activity and improves overnight with elevation. Over time, the elevated venous pressure forces fluid, red blood cells, and protein into the surrounding tissue. The breakdown of extravasated red blood cells produces hemosiderin — an iron-containing pigment that deposits in the skin and produces the characteristic reddish-brown discoloration of the lower leg known as stasis dermatitis. The skin becomes indurated, fibrotic, and fragile — a condition called lipodermatosclerosis — and the risk of venous stasis ulceration increases significantly.

Venous stasis ulcers are one of the most challenging wound management problems in podiatric practice. They typically develop on the medial lower leg above the medial malleolus — the inner ankle — in an area of stasis dermatitis, and they are characteristically shallow, irregularly bordered, and surrounded by indurated discolored skin. They produce significant pain, are prone to infection, and recur at high rates without comprehensive management of the underlying venous disease. Unlike arterial ulcers — which develop from ischemia and require revascularization — venous ulcers require compression therapy, edema control, and wound care as the primary management strategy.

The podiatrist's role in venous insufficiency management is multifaceted. Dr. Gunter evaluates the extent of venous disease, distinguishes venous from arterial or mixed-etiology changes in the lower leg and foot, manages venous ulcers with appropriate wound care and compression, and coordinates with vascular surgery when intervention on the venous system — ablation, stripping, or perforator ligation — is indicated. The distinction between venous and arterial disease is particularly important before applying compression therapy — compression that is appropriate for venous disease can be harmful in a patient with significant arterial insufficiency.