Glomerular filtration rate (GFR) scan

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Learn how a GFR scan is done and how it shows how well the kidneys filter blood.

Key points

  • A renal scan and GFR (glomerular filtration rate) is a test to look at how well the kidneys filter blood. It can take three about hours.
  • Your child will be injected with a small amount of radioactive medicine and have pictures taken of their kidneys. They will then give two samples of blood at set times to show how well the kidneys are filtering the medicine.
  • Your child may be asked to drink one or two extra glasses of water or juice before the scan so they are well hydrated.
  • A nuclear medicine doctor will send the results of the scan to your family doctor or paediatrician (child's doctor) within two working days. The person who does the scan cannot give the results.
Last updated: December 6th 2013