If the patient's filtration capacity of the kidneys is impaired, a large amount of substances enter the urine. It can be protein, glucose, minerals. They increase the specific gravity. It should be 1012-1035 g / l. If the concentration ability is impaired, the indicator will increase.
If the substances are excreted in the urine, they become deficient in the body.
Unlike other studies, for the Zimnitsky sample, a sample is collected during the day (daily urine). The bladder is emptied according to the following rules:
• the first morning portion goes down the toilet;
• all subsequent portions of urine are collected in containers, handing over for analysis.
The doctor determines the density of each urine sample, revealing a tendency to increase or decrease in values per day. The highest concentration of substances should be observed immediately after waking up. At night it is minimal.
If a woman has poor performance according to Zimnitsky, there may be a pathology in the form of glomerulonephritis, pyelonephritis, diabetes mellitus during pregnancy.