eGFR

Specimen Required

Fasting Required

Purpose of the Test

eGFR stands for estimated glomerular filtration rate, which is a measure of kidney function.

When this test is required

The eGFR test may be ordered as part of routine blood work or if a patient has signs or symptoms of kidney disease. It may also be ordered if a patient is taking medications that can affect kidney function or if a patient has a family history of kidney disease.

What the Test Detects

The eGFR test estimates the glomerular filtration rate, which is a measure of how well the kidneys are filtering waste products from the blood. The eGFR is calculated based on the patient’s age, sex, race, and serum creatinine level.

Preparation for the Test

No specific test preparation is needed for the eGFR test. However, patients may be instructed to fast for a certain period of time before the test.

Sample Requirements

The sample required for the eGFR test is a blood sample, which is usually taken from a vein in the arm.

Additional Notes

It is important to note that the eGFR is an estimate of kidney function and is not a direct measure. Additionally, the eGFR can be affected by factors such as age, sex, race, and muscle mass, and may not accurately reflect kidney function in all patients. Therefore, the eGFR results should always be interpreted in the context of the patient’s clinical presentation and other diagnostic tests.

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