There are 2 types of veins in the leg; superficial veins and deep veins. Superficial veins lie just below the skin and are easily seen on the surface. Deep veins, as their name implies, are located deep within the muscles of the leg. Blood flows from the superficial veins into the deep venous system through small perforator veins.
A blood clot (thrombus) in the deep venous system of the leg is not dangerous in itself, however, the situation becomes life threatening if a piece of the blood clot breaks off (embolus), travels downstream through the heart into the pulmonary circulation system, and becomes lodged in the lung. Diagnosis and treatment of a deep vein thrombosis (DVT) is meant to prevent pulmonary embolism -a potentially lethal blood clot in the lungs. In most cases, a pulmonary embolism isn’t fatal. Still, pulmonary embolism is a leading cause of hospital deaths and an increasing threat to passengers on long airplane flights. You can take measures to help prevent deep venous thrombosis and pulmonary embolism.
When you travel or sit for long periods of time, make extra efforts to walk every hour, drink lots of water, perform calf muscle pumps and of course wear your compression stockings. Blood clots can be prevented!