venous reflux
Retrograde blood flow in veins due to valvular incompetence, causing chronic venous insufficiency.
Full Definition
Venous reflux refers to the abnormal retrograde flow of blood in veins caused by incompetent or damaged venous valves that fail to prevent backflow during muscle relaxation. This condition is fundamental to the pathophysiology of chronic venous insufficiency and can affect superficial, deep, or perforating venous systems. Reflux leads to venous hypertension, progressive venous dilation, and eventually to clinical manifestations such as varicose veins, edema, skin changes, and ulceration. Assessment typically involves duplex ultrasonography with standardized reflux time measurements.
Usage
Usage note: Specify affected venous system (superficial, deep, or perforating) when documented.
In Context
- "Duplex ultrasonography revealed significant venous reflux in the great saphenous vein with reflux time exceeding 0.5 seconds." — Vascular laboratory report
- "The patient's leg ulceration was secondary to chronic venous reflux and ambulatory venous hypertension." — Wound clinic assessment