This test is designed to measure the Glomerular Filtration Rate (GFR) which indicates how well the kidneys filter and remove unwanted substances from the blood.
This test is performed to monitor renal function for a number of reasons including:
Patients are injected with 99mTc-DTPA, which is cleared from the blood via the glomeruli within the kidneys. Blood samples are collected 2 and 4 hours later and the level of 99mTc-DTPA remaining is measured using a gamma counter. From this members of our team can calculate the GFR.
Prior to your appointment you must not have any caffeine, this includes; tea, coffee, chocolate, energy drinks and fizzy drinks, from whenyou wake up on the day of your test.
If you have been referred to our department for a GFR assessment, please feel free to download the patient information sheet below.