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Introduction
The Estimated Glomerular Filtration Rate (eGFR) is a calculated measure of kidney function based on creatinine levels, age, sex, and race. It provides a clear picture of how well the kidneys are filtering waste from the blood. At Crossroads Urology, eGFR testing is integral to diagnosing and monitoring kidney health in patients with urologic conditions.
Purpose
eGFR testing is used to:
- Assess kidney function and detect early signs of chronic kidney disease (CKD).
- Monitor patients with risk factors such as diabetes, hypertension, or recurrent kidney stones.
- Evaluate kidney health before and after urologic surgeries or imaging studies requiring contrast.
- Track kidney function over time in patients with known renal conditions.
Procedure
- eGFR is calculated using a blood test for creatinine levels, combined with patient factors such as age, sex, and race.
- The result is expressed as milliliters per minute per 1.73 m² (mL/min/1.73 m²).
- Results are typically available within 1-2 days.
Preparation
- No special preparation is required.
- Avoid excessive protein intake before the test, as it can affect creatinine levels and thus eGFR calculations.
- Inform the provider about medications or supplements that may influence kidney function.
Risks and Considerations
- eGFR testing is safe and involves no additional risk beyond a standard blood draw for creatinine.
- Results are most accurate when combined with other kidney function tests, such as urinalysis or imaging.
At Crossroads Urology, we interpret eGFR in the context of a patient’s overall health and medical history for precise kidney function assessments.
Results
- Normal eGFR Levels: Typically 90-120 mL/min/1.73 m² in healthy individuals, though this decreases with age.
- Reduced eGFR indicates potential kidney dysfunction, with levels below 60 suggesting chronic kidney disease (CKD).
- Severely low eGFR (<15) may indicate end-stage kidney disease (ESKD), requiring dialysis or transplant evaluation.
Conclusion
eGFR is a critical metric for evaluating kidney function and guiding the management of urologic conditions. At Crossroads Urology, we combine advanced diagnostics with personalized care to protect and improve kidney health. Contact us today to learn more about eGFR testing and schedule your evaluation.
