Voiding Cystourethrogram (Bladder Emptying X-Ray)

What is a voiding cystourethrogram?

A voiding cystourethrogram (VCUG) is a test that uses a dye and X-rays to take pictures of the bladder and urethra during urination (voiding). It shows how well the bladder and its connecting tubes (the ureters and urethra) are working. The ureters are the tubes that drain urine from the kidneys to the bladder. The urethra is the tube that drains urine from the bladder to outside the body.

When is it used?

This test may be done to see if:

• A man has narrowing of the urethra.
• The bladder has trouble emptying.
• There is a cause for urinary tract infections.
• The bladder or urethra has an unusual shape or size.
• Urine moves from the bladder back up to the kidney.

You may choose not to have this test. Ask your healthcare provider about your choices for treatment and the risks.

How do I prepare for this test?

Tell your healthcare provider if you have had any kidney problems or reactions to iodine-containing foods or chemicals, such as seafood or X-ray contrast dye.

What happens during the test?

The procedure may be done in your healthcare provider’s office, outpatient center, or hospital.

First an X-ray will be taken of the abdominal (belly) area. Then, a urinary catheter (a small, thin, soft tube) will be inserted into the bladder. It will be inserted through the opening where urine comes out (the urethra).

You may feel some pain or discomfort when the catheter is inserted.

The catheter will be used to fill the bladder with a dye that is easy to see on X-rays. X-rays are taken and viewed on a TV screen by the radiologist. Once the bladder is full, the catheter is removed, so the urethra can be examined with more X-rays while the bladder is emptying.

What happens after the test?

Ask your healthcare provider:

• how and when you will hear the test results
• how long it will take to recover
• what activities you should avoid and when you can return to your normal activities
• how to take care of yourself at home
• what symptoms or problems you should watch for and what to do if you have them

Make sure you know when you should come back for a checkup.

What are the risks of this procedure?

Your healthcare provider will explain the test and any risks. Some possible risks include:

• You may have an infection or bleeding.
• Rarely, you may have a reaction to the dye.

Every procedure or treatment has risks. Ask your healthcare provider how these risks apply to you. Be sure to discuss any other questions or concerns that you may have.