Description
Creatinine with GFR
Sample Type:Serum
Sample Required:
Blood sample (for creatinine) and sometimes urine (for calculation of GFR)
Test Time:
Results typically available within a few days.
What is the test?
This test measures the level of creatinine in the blood and calculates the estimated Glomerular Filtration Rate (eGFR). Creatinine is a waste product from muscle metabolism, and the eGFR is a measurement of kidney function.
Test Procedure:
Blood is drawn for creatinine measurement. GFR is estimated based on factors like age, sex, race, and creatinine level using formulas.
When to take the test:
Routinely for kidney function assessment, especially in individuals with kidney disease or related health conditions.
Who should take the test:
Individuals with kidney disease, hypertension, diabetes, or other conditions affecting kidney function might undergo this test for monitoring.
Precautions for exceptional cases (pregnancy, etc.):
Adjustments in interpretation might be necessary during pregnancy due to changes in kidney function.
Frequently Asked Questions (FAQs) for Creatinine with GFR Test:
Q1: What does the eGFR indicate?
A: The eGFR estimates how well the kidneys are filtering waste from the blood. A lower eGFR indicates reduced kidney function.
Q2: Can factors like muscle mass influence creatinine levels?
A: Yes, higher muscle mass can lead to higher creatinine levels, affecting eGFR calculation.
Q3: What are normal values for eGFR?
A normal eGFR is generally considered to be 90 mL/min/1.73m² or higher. Values below this may indicate reduced kidney function.
Q4: Can medications affect creatinine levels and eGFR?
A: Yes, certain medications or supplements can impact creatinine levels, affecting eGFR calculation.
Q5: Is eGFR always accurate in determining kidney function?
A: While it’s a useful estimation, it might not always reflect actual kidney function. Additional tests might be needed for a comprehensive evaluation.
*Please note that specific testing protocols and guidelines may vary based on the latest recommendations from health authorities and regulatory agencies. It is essential to consult healthcare professionals and follow local testing guidelines for accurate and appropriate testing.
