Glomerular Filtration Rate (GFR): A glomerular filtration rate (GFR) is a blood test that checks how well your kidneys are working. Your kidneys have tiny filters called glomeruli. These filters help remove waste and excess fluid from the blood. A GFR test estimates how much blood passes through these filters each minute.
Glomerular Filtration Rate (GFR)
A GFR can be measured directly, but it is a complicated test, requiring specialized providers. So GFR is most often estimated using a test called an estimated GFR or eGFR. To get an estimate, your provider will use a method known as a GFR calculator. A GFR calculator is a type of mathematical formula that estimates the rate of filtration. It does this by comparing the results of a blood test that measures creatinine, a waste product filtered by the kidneys, with other information about you. This information includes some or all of the following:
- The results of a blood test that measures creatinine, a waste product filtered by the kidneys
Glomerular Filtration Rate (GFR) Test Uses
A GFR test is used to help diagnose kidney disease at an early stage, when it is most treatable. GFR may also be used to monitor people with chronic kidney disease (CKD) or other conditions that cause kidney damage. These include diabetes and high blood pressure.
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