Duplex/Doppler Ultrasound Exam of Extremity, Vascular Ultrasound
DefinitionThis test examines the blood flow in the major arteries and veins in the arms and legs with the use of ultrasound (high-frequency sound waves). The test combines Doppler ultrasonography, which uses audio measurements to "hear" and measure the blood flow and duplex ultrasonography, which provides a visual image.
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Why is the Test Performed?
This test is done as an alternative to arteriography and venography, both invasive procedures with risks. It may help diagnose a blood clot or venous insufficiency, arterial occlusion (closing), abnormalities in the arterial blood flow caused by a narrowing, and to evaluate trauma to the arteries. The test may also be used to monitor arterial reconstruction and bypass grafts.
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