Urea clearance

The main function of glomeruli is filtration, and the objective indicator reflecting its filtration function is mainly glomerular filtration raet (GFR). The amount of blood flowing through the kidney of a normal adult per minute is 1200-1400ml, of which the amount of plasma is 600-800ml. After 20% of the plasma is filtered through the glomerulus, the filtrate produced is about 120-160ml / min. The amount of plasma fluid filtered out by the glomerulus in a unit time (minutes) is called the glomerular filtration rate. In order to determine the glomerular filtration rate, clinically designed plasma clearance tests of various substances .