Chronic Venous Insufficiency (CVI)
CVI is a progressive medical condition that may worsen over time and affects the veins and vessels in the leg that carry oxygen-poor blood back toward the heart. CVI signs and symptoms may include pain, swelling and fatigue of the legs as well as skin damage and ulcers. CVI is often preceded by varicose veins.¹
Leg Vein Anatomy
The leg venous system comprises a network of veins, including:
Superficial venous system: Veins located close to the surface of the skin. There are two principal vessels in the superficial venous system:∗
Great saphenous vein (GSV): A large superficial leg vein running from the front of the anklebone, traveling alongside the inside of the leg and thigh until it empties into the deep vein in the groin called the femoral vein.
Small saphenous vein: A superficial leg vein that runs from outside of the foot and travels up the back of the calf where it empties into the deep vein in the crease of the knee (popliteal vein).
Deep veins: Larger veins located deep in the muscles of the leg.
* The ClosureFast™ procedure is intended to be used in superficial veins only.
Veins in the leg that become swollen and have disease or damaged valves are known as varicose veins. Veins can become varicose when the vein valves that regulate the direction of blood flow become damaged or diseased, weaken and no longer function properly. Instead of blood moving toward the heart like it should, blood stays in place and pools in the vein of the leg.²
Often covering the legs, these damaged veins appear to be similar to varicose veins, only thinner. Often red or blue in color and appearing like thin spider webs or branches, these veins are closer to the skin surface and can spread; however, unlike varicose veins, spider veins are typically not raised above the skin’s surface. Spider veins can be treated with sclerotherapy or laser treatment. Though spider veins may be associated with varicose veins or CVI, the issue is seen as cosmetic and treatment is generally regarded as elective.²