Leg Veins
The veins of the lower extremity are subdivided, into two sets, superficial and deep; the superficial veins are placed underneath the skin; the deep veins within the muscle fascia. Both sets of veins are provided with valves.
The superficial veins of the lower extremity are the great (or long) and small (or short) saphenous veins and their tributaries.
The great saphenous vein is the longest vein in the body, begins in the medial marginal vein of the dorsum of the foot and ends in the femoral vein about 3 cm. below the inguinal ligament.
The small saphenous vein begins behind the lateral malleolus and ends in the popliteal vein, behind the knee.
Veins serve to return de-oxygenated blood from organs to the heart; for this purpose, they have one-way flaps called venous valves that prevent blood from flowing back and pooling in the legs due to gravity.
Venous Insufficiency
When valves become floppy, they are unable to keep the blood from returning back down into the leg and allow downward, reverses flow. Venous insufficiency can be caused by progressive valvular incompetence in the superficial or deep venous system or both, or be the consequence of an episode of venous thrombosis (clot in the leg vein). In these instances venous blood refluxes backward down the veins causing increase in leg vein pressure.
Untreated venous insufficiency in the deep or superficial system causes progressive symptoms involving varicose veins, pain, swelling, skin changes, and eventual tissue breakdown.
Varicose Veins
Prominent, large, tortuous (Varicose) leg veins are an expression of venous infufficiency. In the United States, most studies demonstrate varicose reflux in about 40% of the population, most commonly women (72% of women aged 60-69 years).
Varicose veins are not just an esthetic problem, they are often associated with symptoms such as
- Heaviness
- Restless legs
- Leg fatigue
- Burning
- Swelling
- Throbbing
- Cramping
- Aching
- Itching
- Skin discoloration
- Eczema
- Ulcers
Possible complications of chronic venous insufficiency include: chronic nonhealing leg ulceration, superficial thrombophlebitis, deep venous thrombosis (blood clots) and pulmonary embolism, bleeding varices.
Besides, a number of patients with complicated varicose veinshave a significant impairment of their quality of life, sometimes with loss of working days due to hospitalizations for the complications of their advanced chronic venous disease. Risk factors for the development and progression of varicose veins include:
- Genetic predisposition
- Female gender
- Older age
- Obesity
- Pregnancies
- Prolonged standing
- Previous episode of venous thrombosis
- Hormonal intake