Blood clots can happen in veins. A blood clot in a vein close to the skin isn't likely to cause problems. But having blood clots in deep veins is called deep vein thrombosis. Deep vein thrombosis happens most often in the legs. This problem can lead to a blood clot in the lung (pulmonary embolism).The deep veins of the leg have different terms to describe their location:Upper (proximal) leg veins are those above the knee but below the waist. Popliteal veins are located behind the knee.Iliac and femoral veins are in the groin area.Lower (distal) leg veins are those below the knee. Distal leg veins are located in the calf and ankle.A person with a blood clot in a deep upper (proximal) leg vein is at increased risk for a blood clot in the lung or other complications.
Some people are born with an increased tendency to form blood clots,which increases their risk for developing blood clots in the legs ( deep vein thrombosis ) and in the lungs ( pulmonary embolism ). This tendency is due to inherited blood-clotting irregularities,which are generally related to: Mutated genes (such as factor V Leiden,factor II). Decreased amounts of certain proteins (protein ...
A d-dimer test is a blood test that measures a substance that is released when a blood clot breaks up. Doctors order the d-dimer test, along with other lab tests and imaging scans, to help check for blood-clotting problems. A d-dimer test can also be used to check how well a treatment is working.
Thrombolytic medicines,such as streptokinase,urokinase,or tissue-type plasminogen activator (t-PA),interfere with the action of thrombin,which is needed to form blood clots. These medicines help to dissolve blood clots and may be used to treat pulmonary embolism in life-threatening situations. Research continues on the best use of thrombolytics to treat pulmonary embolism. All ...
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