Intravenous urogram (IVU/IVP)

Category: Imaging & Scans · All imaging & scans

What it is

An intravenous urogram is an X-ray examination of the kidneys, ureters and bladder using contrast dye injected into a vein, which is filtered by the kidneys so the urinary tract shows up on a timed series of pictures. In many centres CT urography has replaced it, but it is still used in some settings.

Why it is done

It may be used to investigate blood in the urine, kidney stones, repeated urinary infections or blockages of the urinary tract.

How to prepare

You may be asked not to eat for a few hours and sometimes to take a mild laxative beforehand so bowel gas does not hide the pictures. Tell the team about allergies, asthma, diabetes medicines and kidney problems.

What happens during the procedure

A dye injection is given into a vein in the arm, then a series of X-rays is taken over 20 to 60 minutes as the dye passes through the kidneys and down to the bladder. You may be asked to empty your bladder partway through for final pictures.

Afterwards — recovery & results

You can usually go home afterwards and eat and drink normally. Drinking water helps flush out the dye. The report goes to your doctor.

Risks & considerations

Risks include an allergic-type reaction to the dye and effects on the kidneys, so kidney function is checked first. The radiation dose is modest. If your centre offers CT urography instead, it gives more detail at a higher dose.

Related guides on MedicalVideos.com

Condition guide: kidney stones

Frequently asked questions

Why several X-rays over an hour?

The pictures are timed to catch the dye at each stage — filling the kidneys, travelling down the ureters, and collecting in the bladder — so the whole tract is assessed.

I have a kidney problem — can I still have it?

The team will check your kidney function first and may choose a different test if the dye is not suitable for you.

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Please note: This page is educational information about a medical procedure or test. It does not replace the instructions of your own care team, who know your situation and whose preparation, fasting and medication advice you should follow if it differs from anything here. If you have symptoms that worry you, or an appointment you do not understand, contact your clinical team.