Definitions for venographyviˈnɒg rə fi
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roentgenographic examination of veins
A diagnostic procedure in which an X-ray of the veins, a venogram, is taken after a special dye is injected into the bone marrow or veins.
Venography is a procedure in which an x-ray of the veins, a venogram, is taken after a special dye is injected into the bone marrow or veins. The dye has to be injected constantly via a catheter, making it an invasive procedure. Normally the catheter is inserted by the groin and moved to the appropriate site by navigating through the vascular system. Contrast venography is the gold standard for judging diagnostic imaging methods for deep venous thrombosis; although, because of its cost, invasiveness, and other limitations this test is rarely performed. Venography can also be used to distinguish blood clots from obstructions in the veins, to evaluate congenital vein problems, to see how the deep leg vein valves are working, or to identify a vein for arterial bypass grafting. Areas of the venous system that can be investigated include the lower extremities, the inferior vena cava, and the upper extremities.
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