Venography takes 30-45 minutes and can be done in a physician's office, a laboratory, or a hospital. The physician observes the movement of the solution through the vein with a fluoroscope while a series of x rays are taken. A contrast solution is injected into a foot vein through a catheter. Venography identifies the location, extent, and degree of attachment of the blood clots and enables the condition of the deep leg veins to be assessed. Venography is the most accurate test, but it is not used much because it is often painful, expensive, exposes the patient to radiation, and can cause allergic reactions and complications. Diagnosisĭeep vein thrombosis can be detected through venography and radionuclide venography, Doppler ultrasonography, and impedance plethysmography. Some individuals and families have underlying clotting tendencies that can be tested for. Fewer than half of all people with the condition experience symptoms, and symptoms tend to be nonspecific (e.g., leg pain may be caused by many other conditions). Symptoms include swelling and tenderness, pain in the calf or thigh, and possibly warmth. Causes and symptomsĭeep vein thrombosis is caused by blood clots in blood vessels that form in veins where blood flow is sluggish or has been disturbed, in pockets in the deep veins of the calf, or in veins that have been traumatized. Deep vein thrombosis can be chronic, with recurrent episodes. Patients with cancer and other chronic illnesses (including congestive heart failure), as well as those who have experienced a recent heart attack (myocardial infarction), are also at high risk for developing DVT. Deep vein thrombosis is also called venous thromboembolism, thrombophlebitis or phlebothrombosis.ĭeep vein thrombosis is a major complication in patients who have had orthopedic surgery or pelvic, abdominal, or thoracic surgery. Each year about 200,000 people die of pulmonary emboli caused by DVT. This is a potentially fatal complication in which blood clots break off, travel through the circulatory system, and become lodged in and block an artery going to the lungs. If left untreated, DVT can cause pulmonary emboli. About 600,000 people are hospitalized in the United States for DVT each year. The disorder is estimated to affect 80 people per 100,000 population annually, but some experts feel this is an underestimate of the disorder because the condition often remains undetected and resolves on its on without complications. Descriptionĭeep vein thrombosis is a common but difficult to detect illness that can be fatal if not treated effectively. 11, 2021.Deep vein thrombosis (DVT) is a blood clot in a major vein that usually develops in the legs and/or pelvis.
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