![]() You may see this called an estimated glomerular filtration rate (eGFR) test.ĮGFR uses the results from a blood test for creatinine, a waste product produced by your muscles. Estimated glomerular filtration rateīecause testing GFR can be very complex, it’s often estimated. To get a more accurate result, it’s important to follow your doctor ’s instructions. You might also be asked to avoid specific foods before the test. This often means drinking only water and eating no food. It ’s possible that your doctor will ask you to fast for a specific period of time before your blood test, especially if you ’re having additional tests that require fasting. If you aren‘t sure, it ‘s best to ask your doctor. Your doctor will give you instructions on how to prepare for your GFR test. The result is known as your estimated GFR, or eGFR. This step is usually completed by a technician at the testing lab or by your doctor. So, to find out your GFR, your creatinine test results are plugged into a math formula with other variables like your age and sex. Your creatinine level can provide information about your kidney function, but it isn‘t the same thing as your GFR. Things get a little more complex from here. The blood sample is then sent to a laboratory for testing.Ī technician at the testing lab will test your blood sample to find out how much creatinine is in your blood. When you get a blood test, a medical professional will use a small needle to draw your blood, usually from a vein in your arm. To test your GFR, your doctor will refer you for a blood test. This is particularly important if you‘re at an increased risk of kidney disease, especially if you have diabetes. This test usually involves testing your blood for a waste product called creatinine.īecause early kidney disease often has no symptoms, a GFR test is a valuable tool for monitoring kidney function. Your kidneys work to filter waste products and excess fluids from your blood, which are then released from your body as urine.Ī glomerular filtration rate (GFR) test measures how well your kidneys are carrying out their filtration function. What is a glomerular filtration rate (GFR) test? ![]()
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