Estimated Glomerular Filtration Rate
This test measures the level of kidney function and is usually part of an annual physical. Inside your kidney are a series of tiny filters that work to remove toxins from your blood. eGFR is the estimated rate at which these filters are working. Kidney disease occurs as these filters become less effective. As they filter less, toxins can build up in your blood. You may not experience symptoms until you have lost perhaps, 40% of function. The estimated result is based upon the creatinine in your blood, your age, race, height, weight and gender..