Compression Treatment In Preventing Deep Vein Thrombosis
Deep vein thrombosis is blood clotting in the deep veins. A clot that forms in a blood vessel is called a thrombus. Although thrombi can occur in either the superficial or deep leg veins, only those in the deep veins are potentially dangerous. Deep vein thrombosis is dangerous because all or part of the thrombus can break loose, float along in the bloodstream and lodge in a narrow artery in the lung, obstructing blood flow. A moving thrombus is called an embolus.
Deep vein thrombosis is shouldn’t be confused with phlebitis in varicose veins which is painful but comparatively harmless
Three factors can contribute to deep vein thrombosis: injury to the lining of the vein; an increased tendency for blood to clot, as can happen with some cancers and rarely with oral contraceptive use; and slowing of the blood flow in the veins, as happens during prolonged bed rest because the calf muscles aren’t contracting and squeezing the blood toward the heart. For example, deep vein thrombosis can occur in the heart attack patients who lie in hospital beds for several days with little leg movement or in paraplegics who sit for long periods and whose muscles don’t function. Injury or major surgery also can increase the tendency for blood to clot. Thrombosis can even occur in healthy people who sit for long periods, for instance, during lengthy drives or plane flights.
About half the people with deep vein thrombosis have no symptoms at all. In these people, chest pain caused by pulmonary embolism may be the first indication that something is wrong. When deep vein thrombosis causes substantial inflammation and blood flow obstruction, the calf swells and may be painful, tender to the touch and warm. The ankle, foot or thigh may also swell, depending on which veins are involved. Some thrombi heal by being converted to scar tissue which may damage the valves in the veins. The resulting accumulation of fluid (oedema) can make the ankle swell. The oedema can extend up the leg and even affect the thigh, if the obstruction is high enough in the vein. Oedema is worse toward the end of the day because of the effect of gravity when standing or sitting. Overnight the oedema subsides because the veins empty well when the legs are horizontal. Although the risk of deep vein thrombosis can’t be entirely eliminated, it can be reduced in several ways. One of the these ways is wearing anti-embolism stockings continuously makes the veins narrow slightly and the blood flow more rapidly, making clotting less likely. They exert an external pressure which is greater at ankle and reduces at the calf and thigh, this increasing blood velocity within the deep venous system.
- Prophylaxis against deep venous thrombosis in medical and surgical patients
- Improve resolution of varicose veins by providing graduated compression and increased venous blow flow return
- Improve blood flood of other venous disorders, such as chronic venous stasis.
- Leg conditions that may be exacerbated by stockings include;
e) Recent skin grafting,
- Severe arteriosclerosis or other ischemic vascular disease,
- Massive oedema of legs or pulmonary oedema from congestive heart failure,
- Extreme deformity of leg,