The number of GFR indicates kidney function. Abnormal GFR (Glomerular Filtration
What is GFR?
When plasma flows through glomerular capillaries, the compositions of the
plasma except protein will be filtrated into the renal capsules and form
ultrafiltrated liquid—“initial urine”.
Filtration rate: the ultrafiltrated liquid (ml) produced by bilateral kidneys
every minute is glomerular filtration rate.
The average glomerular filtration rate of healthy people is 125ml/min and the
initial urine filtrated by bilateral kidneys is 180L.
The 180L initial urine will flow through the tubules. 99% of the initial
urine will be reabsorbed and the terminal urine is only 1% of the initial
Your GFR number is an estimate of how much kidney function you have. And it
is the best way to check kidney function. In adults, the normal GFR is 90 or
higher. GFR turns to decline as we age even in people without kidney disease. A
GFR below 60 is abnormal. The GFR test should be repeated.
GFR should be cared when you know that you have got kidney diseases.