Allows you to evaluate the function of the kidneys to purify the blood, as well as their excretory ability. During the day, urine is collected in one container, which is stored in the refrigerator. After the volume of urine must be measured and mixed. 70-100 ml of biomaterial are delivered to the laboratory, poured into a special container. In this case, the specialist must also report the total volume of urine. At the same time, blood is taken from a vein for creatinine (a protein that is excreted in the urine, it allows you to evaluate the work of the kidneys).
Before the analysis, complete physical and emotional rest is recommended, the use of coffee and strong tea is excluded.