Deep vein thrombosis, or DVT, is a blood clot in a vein. Patients undergoing surgery and patients on bed-rest in a hospital setting are at a higher risk developing deep vein thrombosis.
DVT is a potentially serious condition. If not treated, the blood clot can travel to the lung and cause a pulmonary embolism, which could be life threatening. Blood clots kill millions of hospital patients across the world. In the US about 2 million patients have DVT and some 200,000 hospital patients die of DVT each year.
This reference summary explains deep vein thrombosis, and provides tips for preventing it.