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What Are Venous Valves, and Why Are They so Important?


Submitted by Drs. Bohn, Nielsen, Castillo, Wright, and Ward, The Vein Specialists, LLC

The valves in your veins ensure the veins function properly — here’s how they work.

You may know that your veins transport blood to the heart, but you might not know as much about the structure of these blood vessels. For example, did you know that your veins are equipped with a set of valves that ensure your blood flows through them properly? Here is a quick and simple overview of your venous valves, outlining how they work.

How valves work
Venous valves typically consist of two elastic flaps of tissue that open and close in alternation. Venous valves work in conjunction with the musculoskeletal system. Muscles constantly contract and release, causing the blood to flow toward the heart. The valves open, allowing the blood to flow, and close, stopping the blood from flowing backwards.

After running through this network of veins, blood reaches the heart and travels to the lungs, which supply it with oxygen and allow it to expel carbon dioxide and other waste. The oxygenated blood then courses through the pulmonary vein back to the heart, which pumps it through the arterial system to the rest of the body.

The danger of backflow
The regular opening and closing of valves prevents backflow (blood that is flowing in reverse — also called venous reflux or insufficiency). If backflow occurs, blood can begin to pool in the veins, potentially damaging them. Most common venous disorders are caused by the backflow or venous insufficiency.

Varicose veins
Healthy venous valves successfully open and close as necessary. In many people, the valves will break, leading to backflow or venous insufficiency. This can lead to varicose veins.

These distended blood vessels result in moderate to severe pain and visible swelling, in addition to preventing blood from circulating as it should.

When left untreated, varicose veins can result in skin ulcers, blood clots, increased pain and swelling, and even deep vein thrombosis (DVT). It’s best to treat varicose veins as soon as possible to avoid these costly and, in the case of DVT, potentially life-threatening complications.

Contact The V­ Specialists today at 309-862-4000 to schedule a consultation with one of their physicians or request an appointment online at They have convenient locations at 3302 Gerig Drive in Bloomington or 2011 Rock Street, Suite D2 in Peru.