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Deep vein thrombosis

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发表于 2017-5-13 09:28:49 | 显示全部楼层 |阅读模式
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Deep vein thrombosis
   A vein is a blood vessel that returns blood from the tissues of the body back tothe heart. The body has two distinct systems of veins — superficial and deep. The superficial system is made up of veinsthat are close to the skin. The deep system is comprised of veins within themuscles of the body. The two systems are connected by small communicatingveins. The body regulates the amount of blood going through both systems as away of rigidly controlling the body’s central temperature.  
   Deep vein thrombosis (DVT) is a condition wherein a blood clot forms ina vein of the deep system. Anything that damages the inner lining of a vein maycontribute to DVT, including surgery, injury, or an immune system response.Blood that is thick or flows too slowly is more likely to form a clot,especially in a vein that is already damaged. Other things that increase riskfor blood clotting include genetic disorders, hormone changes, and lack ofmovement.
   DVTs can occur anywhere in the body, but are most frequently found inthe deep veins of the legs, thighs, and pelvis and almost always on one side ofthe body. Some people may develop DVT and not be aware of it; there will be nosymptoms. Commonly, though, the patient will experience pain, swelling,redness, tenderness and warmth in the affected area; superficial veins mayswell up too. DVTs are most common in adults over age 60. However, they canoccur at any age.
    When a clotbreaks off and moves through the bloodstream, the loose clot is called anembolus. It can travel to the brain, lungs, heart, or other area, leading tosevere damage.

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