A venogram is an
X-ray test that takes pictures of blood flow through
the veins in a certain area of the body.
During a venogram, a
special dye (contrast material) is put into your veins so they can
be seen clearly on an X-ray picture. A venogram looks at the condition of your
veins and the valves in your veins.
A venogram can show the veins
in your legs, pelvis, or arm; the veins leading to the heart; or the veins
leaving your kidneys.
See pictures of
normal blood flow and blood flow blocked by a
blood clot (thrombus) .
Why It Is Done
Venography might be done to:
- Check the blood flow in veins.
- Find the right placement in blood vessels for
medical devices such as
How To Prepare
Do not eat for 4 hours before a
venogram. You may drink only clear fluids for 4 hours before the test.
Before a venogram, tell your doctor if you:
- Are or might be pregnant.
- Are allergic to any
contrast material, or iodine dye.
bleeding problems or take blood-thinning medicines, such as aspirin, heparin,
or warfarin (Coumadin).
- Have had a severe allergic
- Have had kidney
diabetes, especially if you take metformin
You will be asked to sign a consent form for this test.
Talk to your doctor about any concerns you have regarding the need for the
test, its risks, how it will be done, or what the results may mean. To help you
understand the importance of this test, fill out the
medical test information form(What is a PDF document?).
How It Is Done
A venogram usually is done in a
hospital X-ray department by a
radiologist and an X-ray technologist. A nurse may
also be present.
Take off all jewelry and metal objects before the
test. You will need to take off all or most of your clothes. You will be given
a gown to use during the test. You may be asked to urinate just before the test
You will lie on an
X-ray table. A tilting X-ray table is usually used when studying the legs.
Safety straps will help you lie still if the table is tilted.
a leg venogram, you will be asked to relax the leg and keep it still during the
X-rays. An elastic band will be put around your leg or ankle to make the veins
of the foot fill with blood. The dye will be put in a vein (IV) on the top of
If the veins in your pelvis are studied, the dye may be
placed in a vein in your groin. For an arm venogram, the dye will be put into a
vein on the top of your hand or in your arm.