Venous ulcers are wounds that are thought to occur due to improper functioning of venous valves , usually of the legs hence leg ulcers. Exercise together with compression stocking increases healing. The exact cause of venous ulcers is not certain, but they are thought to arise when venous valves that exist to prevent backflow of blood do not function properly, causing the pressure in veins to increase. When venous hypertension exists, arteries no longer have significantly higher pressure than veins, and blood is not pumped as effectively into or out of the area. Venous hypertension may also stretch veins and allow blood proteins to leak into the extravascular space , isolating extracellular matrix ECM molecules and growth factors , preventing them from helping to heal the wound. It is in the crus that the classic venous stasis ulcer occurs.
Venous Stasis in the Legs Symptoms with Eczema & Ulcer Pictures
Venous leg ulcer - Illnesses & conditions | NHS inform
Leg ulcers are of huge socio-economic importance costing the NHS over one billion pounds per year. This chapter discusses leg ulcers, along with disorders of venous insufficiency such as lipodermatosclerosis , and is set out as follows:. A working definition of a leg ulcer would be an area of epidermal discontinuity lasting in excess of four weeks:. Please click on images to enlarge or download. All named individuals and organisations maintain copyright for the relevant images. This website is non-profit and holds the images for educational purposes only. Any image downloaded must only be used for teaching purposes and not for commercial use.
Venous leg ulcer
Venous ulcers open sores can occur when the veins in your legs do not push blood back up to your heart as well as they should. Blood backs up in the veins, building up pressure. If not treated, increased pressure and excess fluid in the affected area can cause an open sore to form. The cause of venous ulcers is high pressure in the veins of the lower leg. The veins have one-way valves that keep blood flowing up toward your heart.