What is an IVP?

An intravenous pyelogram, or IVP as it is usually called, is a special x-ray of the kidneys and bladder.

A plain x-ray of the abdomen provides little or no information about the kidneys. An IVP allows your doctor to see the location and size of your kidneys and to get a general idea of whether they are functioning. The IVP can show deformities, blockages, stones, and tumors inside your kidneys.

How is it done?

An IVP may be performed in the x-ray department of a large clinic or hospital or in an outpatient center. You will need to wear a hospital gown so that items from your clothing, such as zippers, do not interfere with the x-ray picture.

First a plain x-ray is taken of your abdomen. Then a special dye (called contrast medium) is injected into the vein in your arm at the elbow.

There is a small risk that you will have an allergic reaction to the dye. Be sure to tell your doctor and the radiologist or technician if you know you are allergic to any medications.

After the dye has been injected into the vein, a series of timed x-rays are taken. These x-rays allow your doctor to see how the dye flows through your kidneys. The doctor can see the size and location of your kidneys and whether all parts of them are functioning.

As the dye leaves the kidneys it enters the ureters. The ureters are the tubes that drain urine from the kidneys into the bladder. As urine containing the dye flows into your bladder, it gives a picture of the bladder. Dye flowing through the ureter and bladder helps your doctor see possible stones (calculi) or other blockages of the normal flow of urine.

The timed series of x-rays lasts 10 to 15 minutes on the average. When the test is done, you may be able to leave, depending on your doctor's instructions.