Lower extremity venography

Injury	Disease	Nutrition	Poison

Symptoms	Surgery	Test	Special Topic

Leg venography

Overview

Risks

Results

Lower extremity venography

Definition:

Lower extremity venography is a test used to visualize the veins in the leg.

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X-rays are a form of electromagnetic radiation like light, but of higher energy, so they can penetrate the body to form an image on film. Structures that are dense (such as bone) will appear white, air will be black, and other structures will be shades of gray.

Veins are not normally seen in an x-ray, so a contrast material is injected into the vein to make it visible. In this test, the contrast material is injected into the vein of the affected leg.
Alternative Names:
Phlebography; Venogram
How the test is performed:

This test is done in a hospital. You will be asked to lie on an x-ray table. Local anesthetic is used, and you may ask for a sedative if you are anxious about the test.

A needle is inserted into a vein in the foot of the affected leg so that an intravenous catheter (a short flexible tube) can be inserted. Contrast material is injected into the vein through the catheter. A tourniquet may be placed on your leg so the contrast medium will flow up the deeper veins.

X-rays are taken as the contrast material flows through the leg.

The catheter is then withdrawn, and the puncture site is bandaged.

How to prepare for the test:

You will wear hospital clothing during this procedure. You may be asked to sign a consent form for the procedure. Remove all jewelry from the area being imaged.

Inform the health care provider if you are pregnant, if you have allergies to any medication, which medications you are taking (including any herbal preparations), and if you have ever had any allergic reactions to x-ray contrast material or iodine substance.

Infants and children:

The preparation you can provide for this test depends on your child's age, previous experiences, and level of trust. For general information regarding how you can prepare your child, see the following topics:

Infant test or procedure preparation (birth to 1 year)
Toddler test or procedure preparation (1 to 3 years)
Preschooler test or procedure preparation (3 to 6 years)
Schoolage test or procedure preparation (6 to 12 years)
Adolescent test or procedure preparation (12 to 18 years)

How the test will feel:

The x-ray table is hard and cold, so you may want to ask for a blanket or pillow. You will feel a sharp poke when the intravenous catheter is inserted. As the dye is injected, you may experience a burning sensation.

There may be tenderness and bruising at the site of the injection after the test.

Why the test is performed:

This test is used to identify and locate thrombi (blood clots) in the veins of the extremity that is affected.

Ultrasound is a newer procedure with fewer risks and side effects, and it is used more often than lower extremity venography.