The glomerular filtration rate (GFR) shows how much urine is produced in the kidneys per unit of time and is usually expressed in ml/min. This is a very important indicator, as it can be used to assess the ability of the kidneys to perform their main function of purifying plasma and forming urine. GFR is a very sensitive indicator, in case of kidney diseases, it usually changes faster than urea, creatinine, ammonia, etc.
|Stages of chronic kidney disease (CKD)|
|Stage||GFR ml/min/ 1.73 m2||Feature|
|I||GFR ≥ 90 ml/min/ 1.73 m2||Kidney damage with normal or elevated GFR|
|II||GFR 60-89 ml/min/ 1.73 m2||Kidney damage with a slight decrease of GF|
|III||GFR 30-59 ml/min/ 1.73 m2||Moderate decrease in GFR|
|IV||GFR 15-29 ml/min/ 1.73 m2||Severe reduction|
|V||GFR ≤ 15 ml/min/ 1.73 m2||Kidney failure|