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Venous insufficiency is a condition in which blood pools in the vein because the valves have become incompetent.
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∙ 9y ago
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What condition is caused by defective valves in the lower leg veins?
This is called Chronic Venous Insufficiency.
What is the function of the valves in veins in the leg?
The valves help to prevent blood from seeping backwards. They provide a one way valve. When valves begin to fail blood may become stagnant and cause unsightly varicose veins - usually in the legs..
What is the function of the valves in the veins in the leg?
The valves help to prevent blood from seeping backwards. They provide a one way valve. When valves begin to fail blood may become stagnant and cause unsightly varicose veins - usually in the legs..
Why do veins have one way valves?
The one way valve prevent blood seeping backwards (downwards) due to gravity. For instance, if a valve in the leg fails or doesn't work properly, Varicose veins (swollen and enlarged veins) will occur.
Why the blood is not accumulating in the leg while standing?
The blood does not accumulate when we are standing as the blood keeps circulating and the valves present in the veins take it back to the heart.
Why are the viens close to the leg surface more vulnerable to varicose veins?
Varicose veins are caused by a defect in the valves directing one way flow inside the veins. When the valves are not functioning correctly, the blood backs up into the surface (superficial) veins and presents as varicosities. The reason that it is more likely to occur in the legs is that there is a greater fluid pressure caused by gravity's effect on the column of blood within your body.
A pregnant patient comes into a clinic and asks about a small dark bulge that is becoming more apparent on her leg what is it and what caused it?
Answer: The patient is getting a varicose vein. Due to the growing fetus putting downward pressure on the vessels of the groin and restricting the return of blood to the heart, the valves in the peripheral veins begin to fail. This causes blood pooling, which enlarges these veins and puts additional strain on other peripheral vein valves down the line
What causes varicose veins?
There are two causes are there for the same probably. One is the pressure of the growing uterus on the abdominal veins. That increase the pressure in the leg veins. So they become tortuous. That is varicose. The other reason is related to increased level of pregnancy hormones. The exact contribution of the both is not known to me. You may ask the lady to sleep on the side to prevent the compression of the abdominal veins. But you can not ask her to maintain that position during the sleep.
What is the structure that keeps blood from flowing backwards?
Tiny valves in your veins keep blood from backing up. The pumping force of your heart keeps the blood flowing forward. If a valve in your leg stops working properly, the blood seeping back causes varicose veins mainly in your legs, though can occur anywhere.
What is a superficial vein in the leg?
The superficial veins of the legs connect to the deep veins through "penetrating veins" which run perpendicular to the skin from one to the other. The deep veins are essentially a column of blood running from your head to you feet and so when one is standing are under high pressure. In order to keep this pressure away from the frail superficial veins the penetrating veins have valves. When one of these valves goes bad the high pressure is allowed to go back to the superficial veins which blow up like balloons and become visible as what we call varicose veins (or "spider veins").
How is blood kept moving in large veins of the leg?
The muscles in your legs help transport blood back to your heart. The veins in your legs also have valves to help this process and prevent blood from flowing back down towards your feet.
Why are valves present in veins and not arteries?
bgecause the blood is under low pressure because of the size of the lumen (the inside of the vein) it has to get all the way back to yr heart from yr leg say so the valves prevent backflow and help it get up their
