Voiding Cystourethrogram (VCUG) | Boston Children's Hospital (2024)

How do I prepare my child for the VCUG?

The test is performed in the morning. On the day of the VCUG, you will speak with a radiologist, who will explain what will happen during the procedure and answer any questions or concerns you may have. A Child Life specialist or another clinical staff member will also be present to assist you in caring for your child during the test.

When you arrive in the Radiology Department:

You will check in.
You will be greeted by a staff member who will ask you some questions about your child's condition, explain the test, and answer your questions.
Your child will change into a hospital gown.
If your child is toilet-trained, he will be asked to go to the bathroom before the exam.
You and your child will be taken to the procedure room.

What happens during the test?

The technologist will help your child onto the fluoroscopy table.
Your child will need to remove underpants and socks.
Your child will need to lie on his or her back. Girls will position their legs like a frog's. Our VCUG team is very aware of the sensitive nature of the area to be tested and makes every effort to ensure privacy and comfort.
The technologist will put on clean gloves and wash between your child's legs with soap and water on cotton balls. It will be important for your child to remain still and to avoid touching his body below the waist. We realize laying still may be challenging for your child. We will give you suggestions on ways to distract your child in order to help them keep his body still.
The radiologist will then gently slide a very small tube (a catheter) coated with numbing gel into the small opening where urine comes out of the body (the urethra). The catheter can sometimes make children feel as though they need to urinate.
The tube will be taped in place and a urine sample will be collected.
A radio-opaque liquid will flow from a bottle through a tube, and into the catheter to fill your child's bladder. This contrast material illuminates the urinary tract on x-ray images.
Using fluoroscopy, a special x-ray technique, the radiologist will obtain images of your child's bladder filling and emptying. You will be able to see this on a monitor in the room.
If your child is old enough, we will ask him or her to urinate right on the table into a towel or a cup. This may be difficult, but it's important. Babies will urinate on his own when the bladder is full.

What happens after the VCUG?

The technologist will let you know when your child may get dressed and you may leave. If you have an appointment with another doctor in the hospital afterward, the radiologist will give you a note with the results to take with you. The radiologist will then prepare a written report for your child's doctor.

Your child may have some discomfort, pink urine, or feel a bit of stinging while going to the bathroom. This is normal and will go away. Drinking extra fluids will help.

Call your child's doctor if your child has red blood in the urine, pain, or a fever.

Are there risks associated with VCUG?

Your child will be exposed to ionizing radiation (x-rays) during this procedure. While we always attempt to minimize exposure to x-rays, we believe that the benefit of an accurate diagnosis outweighs the exposure that occurs during the exam.

Because children are more sensitive to radiation exposure than adults, we have been leaders in adjusting equipment and procedures to deliver the lowest possible dose to young patients.

Voiding Cystourethrogram (VCUG) | Boston Children's Hospital (2024)

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