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Moore Travel Tips |
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What is deep vein thrombosis? |
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It is not only long distance air travel that puts people at risk. Sitting in one position for too long is a major factor. It can arise in first and business class not just economy, during a long car, bus or train journeys. If you work at a computer desk, or by a cash desk for long hours you are also at risk. Prolonged inactivity is the real problem. What causes deep vein thrombisis (DVT)? Most of us have experienced our legs and ankles feeling tight after flying. That is the normal swelling brought on by being in a pressurised environment. The risk while flying is increased because of the reduced cabin pressure at high altitudes, which causes fluid to pass from the blood vessels into the surrounding tissue, causing thickening of the blood. Normal movement of the calf muscle when walking helps to pump blood from the legs to the heart, but with the loss of fluid while sitting for long periods, the blood can thicken, coagulate and form a clot in the deep veins of the leg. In most cases of Deep vein thrombosis DVT, the clots are small and do not cause any symptoms. The body is able to gradually break down the clot and there are no long-term effects. The danger with larger clots may partially or totally block the blood flow in the vein and cause swelling of the calf (this is usually different from the mild ankle swelling that many people get during long haul flights) pain in the calf that is noticeable, or worse when standing or walking. The following increases your risk of Deep vein thrombosis DVT, blood clotting disorders, varicose veins, cancer, heart failure, pregnancy, use of estrogen-containing medications, recent surgery or trauma, smoking, being overweight, age over 40 years and prolonged immobility. Deep vein thrombosis prevention tips
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