The Estimated Glomerular Filtration Rate (eGFR) is a precise measure healthcare professionals use to analyse how well your kidneys function. The Glomerular Filtration Test helps assess kidney health by measuring the glomeruli, the tiny filters in your kidneys, and how well they expel waste products from the blood. It is generally expressed in millimetres per minute per 1.73 square metres (mL/min/1.73 m2).

Directly measuring the exact GFR is considered an expensive and bulky task.

Therefore, healthcare professionals often measure using the eGFR. These tests are usually part of the basic metabolic panel. It is a valuable test for determining your kidneys' overall condition and functioning. By detecting kidney issues early and implementing appropriate interventions, such as lifestyle changes and medications, complications can be minimised, and kidney health can be preserved. Keep reading to learn more about the eGFR test and what the results signify.

What Is eGFR (Estimated Glomerular Filtration Rate?

Healthcare professionals often order an eGFR to assess your kidneys' overall health and functioning and help identify potential risks and associated diseases. This information is crucial in identifying and addressing chronic kidney disease (CKD) diseases in their early stages. eGFR is further helpful for healthcare professionals in designing a treatment plan for individuals suffering from different stages of chronic kidney diseases.

eGFR, or estimated glomerular filtration rate, assesses kidney function. It estimates the rate at which blood is filtered by the kidneys per minute, indicating how well the kidneys function in removing waste products from the blood. eGFR is calculated based on a person's age, gender, race, and serum creatinine levels. It is a crucial tool in diagnosing and monitoring kidney disease and determining appropriate treatment strategies to maintain kidney health.

Why do Healthcare Professionals Order eGFR?

Most kidney diseases appear once you lose 40–50% of your kidney function. Therefore, to slow down the progression of kidney diseases, healthcare professionals order an eGFR test. This test provides a valuable indicator of kidney function, enabling the identification of dysfunction even before symptoms manifest. Regular monitoring of eGFR allows healthcare providers to track changes in kidney function over time and intervene promptly to slow the progression of kidney disease.

Who Needs the eGFR Test?

An eGFR test is recommended for individuals at risk of developing kidney disease. This includes people who have diabetes, a family history of kidney disease, coronary artery disease, congenital disabilities, frequent UTIs, obesity, and past/present smokers. By evaluating the estimated glomerular filtration rate (eGFR), healthcare professionals can detect early signs of kidney dysfunction in these high-risk individuals. Regular monitoring of eGFR allows for timely interventions to manage kidney health and prevent disease progression.

How Is the eGFR Test Conducted?

The eGFR test (Estimated Glomerular Filtration Rate) assesses kidney function. Here is the step-by-step procedure for the test:

Step 1 : A blood sample is safely drawn from a vein in the arm.
Step 2 : The sample is then analysed in a laboratory to measure creatinine, a muscle waste product.
Step 3 : Creatinine levels, alongside age, gender, and race, are inputs in formulas estimating glomerular filtration rate (GFR). GFR measures kidney efficiency in filtering waste from blood. Factors like age, gender, and race impact muscle mass and creatinine production, influencing creatinine levels. Equations such as MDRD or CKD-EPI incorporate these factors to estimate GFR accurately. This aids in diagnosing and monitoring kidney conditions like chronic kidney disease.

The test results help healthcare professionals diagnose and monitor chronic kidney disease (CKD) conditions. It's a crucial tool in managing renal health.

What Do the Results Of eGFR Reveals?

The results of an eGFR test reveal critical insights into kidney function. A higher eGFR value generally indicates healthier kidney function, as it helps efficiently filter waste from the blood. On the other hand, a lower eGFR value may indicate impaired kidney function, potentially signalling conditions like chronic kidney disease (CKD) or kidney damage.

eGFR results are often categorised into stages, ranging from average to severely impaired kidney function, helping healthcare professionals determine the appropriate treatment plan and approach. They also help monitor the progression of kidney disease over time, enabling timely adjustments/changes to therapy or lifestyle modifications. eGFR results are vital in diagnosing, managing, and prognosticating various renal conditions.

Conclusion

The eGFR test is a crucial diagnostic tool for helping medical professionals worldwide assess kidney function. By measuring the eGFR, medical professionals can diagnose conditions such as chronic kidney disease and monitor the progression of renal (kidney) health over time. This helps doctors step in early with the proper treatment and customised plans for you.

Frequently Asked Questions About eGFR (Estimated Glomerular Filtration Rate

Q1. What is a good GFR for a 30-year-old?
A1. Above 90 mL/min/1.73m² is good for a 30-year-old.

Q2. What is the normal result of eGFR?
A2. The normal result for eGFR is typically above 90 mL/min/1.73m².

Q3. Is 70 GFR normal?
A3. Yes, a GFR of 70 is generally considered normal.

Q4. Can I check my GFR at home?
A4. No, GFR testing typically requires a blood sample and lab analysis, so it cannot be done at home.

Q5. Which foods increase GFR?
A5. Foods like fruits, vegetables, and lean proteins can help support kidney health and potentially increase GFR.