Kidney function – GFR Test

What is a GFR test?

A GFR (Glomerular Filtration Rate) Test shows how well your kidneys are working.

Do I need to prepare for the test?

There is no preparation for the test. Eat and drink as normal and take any medication as usual.

What is involved in the test?

A small amount of radioactivity is injected into a vein. Blood samples are then taken at 2, 3 and 4 hours after the injection. The samples are taken from a different vein to that of the injection.

You are free to leave the department and/or hospital after the injection and between the taking of any of the blood samples.

DMSA Study

What is a DMSA scan?

Kidney (DMSA) scans reveal how well the kidneys are functioning and can help in the diagnosis and treatment of certain kidney conditions. These include assessing the size, shape and position of the kidneys, gauging any scarring of the cortex and verifying the viability of the kidneys following trauma . The radiopharmaceutical is taken up in the blood and becomes fixed in the kidneys whose picture gives an indication of their shape and if there are any damaged areas.

MAG 3 Study

What is a MAG3 renal scan?

The MAG 3 kidney scan reveals how well the urinary system is functioning, including flow to the bladder. Several pictures of the kidneys are taken, from which a curve is drawn on a graph which indicates how effectively the kidneys are excreting urine to the bladder.

Please click here and select the age range of the patient for further information

Indirect Cystogram – Overview

What is an indirect cystogram?

An indirect cystogram helps to determine if any of the urine flows back towards the kidneys while emptying the bladder. This backflow can cause urinary tract infections.

Please click here and select the age range of the patient for further information

Aspirin Renal Study

What is an Aspirin Renal Study?

A aspirin renal study helps in the diagnosis of your hypertension.

Are there any special preparations for the scan?

There are no special preparations for the scan. Eat and drink as normal.

The scan is performed in two parts on two different days.

First part: Day 1

What happens when I arrive in Nuclear Medicine?

When you first arrive in Nuclear Medicine, you will be asked to drink 3 cups of water over a period of 30 minutes. You will then be taken into the scanning room and ask to lie on the couch. A small amount of a radioactive substance will then be injected into a vein in your arm to enable us to perform the scan.

How long between the injection and the scan?

The scan will be performed immediately after the injection.

How are the images acquired?

The camera will be placed under the couch, below your abdomen. The image takes about 30 minutes to acquire.

Second part: Day 2

When you arrive in the department for your second appointment, you will be required to take a dose of aspirin. You will need to take this in the department, and we request that you bring the aspirin with you. We will tell you what dosage is required at your first appointment. If you are unable to take aspirin, please contact the department as soon as possible.

1 hour later we will inject a small amount of radioactive material into a vein in your arm and immediately take some more images. During the hour we will need you to drink 3 cups of fluid. The images will take 30 minutes to acquire.

©2019 Royal Surrey County Hospital

Log in with your credentials

Forgot your details?