Glomerular filtration is the process by which the kidneys filter
the blood, removing excess wastes and fluids. Glomerular filtration rate (GFR)
is a calculation that determines how well the blood is filtered by the kidneys,
which is one way to measure remaining kidney function.
Glomerular filtration rate is usually calculated using a
mathematical formula that compares a person's size, age, sex, and race to serum
creatinine levels. A GFR under 60 mL/min/1.73 m² may indicate kidney
disease-the lower the GFR number, the worse the kidney function. This number is
an estimate. It may not be a good measure of kidney health in some people, such
as the very young or very old, amputees, or obese people.
