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Kidney function tests are urine or blood tests that evaluate how well your kidneys are working. Most of these tests measure glomerular filtration rate (GFR). GFR assesses how efficiently your kidneys clear waste from your system.
Why might I need a kidney function test?
You may also need a kidney function test if you have symptoms that indicate possible kidney problems. These symptoms might include:
- Blood in your urine (hematuria).
- Painful urination (dysuria).
- Frequent urge to urinate.
- Problems with starting to pee.