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Venography is a study of veins in the body. Contrast medium (X-ray dye) is injected into the veins. This helps the blood vessels show clearly on X-ray pictures. X-rays of the veins are then taken.

Outline of human figure showing veins. Veins are vessels that carry blood throughout the body and to the heart.

Before the Procedure

Follow any instructions you are given on how to prepare, including:

  • Do not eat or drink anything for 6┬áhours before the test.

  • Tell the technologist what medications, herbs, or supplements you take; if you are, or may be, pregnant; or if you are allergic to contrast medium or other medications.

During the Procedure

  • You will change into a hospital gown and lie on an X-ray table.

  • An area of skin over the insertion site will be cleaned. Local anesthetic may be injected to numb the skin.

  • An IV (intravenous) line is put into a vein in the prepared area.

  • Contrast medium is injected through the IV into the vein.

  • You will be asked to keep still while X-rays are taken. The technologist will tell you when you can move.

  • The IV will be removed and the insertion site will be bandaged.

After the Procedure

  • Drink plenty of water to help flush the contrast medium from your body.

  • Care for the insertion site as directed.

  • Call your health care provider if you have fever or redness, pain, or swelling at the insertion site.

Potential Risks and Complications

  • Infection or bruising around the catheter insertion site

  • Problems due to contrast medium, including allergic reaction or kidney damage

  • Inflammation of the vein (phlebitis)

  • Worsening of clotting

  • Skin damage due to contrast fluid leaking from insertion site


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