The analysis of urine according to Zimnitskiy is a method of diagnosing the concentration function of the kidneys

Acute and chronic kidney disease can be complicated by the development of symptoms of kidney failure, which gradually progresses. Therefore, it is very important to identify the appearance of renal failure as early as possible in order to timely take the necessary therapeutic measures and prevent the further development of this unsafe condition. Often, a simple and careful observation of the release of urine, its specific gravity in individual portions indicates changes in the work of the kidneys.

The concentration function of the kidneys is roughly estimated from the relative density of urine in the general urine analysis. Normally, it should be at least 1.018. If the relative density of morning urine is 1.018-1.020 and there is no glucose and a significant amount of protein, the concentration function of the kidneys is preserved. If the relative density in the general analysis is less than 1.018, then it helps to determine the functional state of the kidneys urine analysis according to Zimnitsky. The technique of the analysis was proposed by the doctor-therapist Zimnitsky SS. In 1924 and successfully used in domestic medicine to date. The analysis of urine according to Zimnitsky is physiological, does not require special tools and preparation, is well tolerated by patients. The most important is the observance of urine sampling for analysis.

Analysis of urine in Zimnitskiy: technique of conducting

Before starting the study, you need to prepare eight clean glass jars (often using 0.250 l glass cans used as a container for mayonnaise and other food products) or special plastic containers that can be bought at a pharmacy. Labels are labeled on each container, marking the portion number and time of its collection. On the eve of this procedure, the patient should not take diuretics. Analysis of Zimnitsky is carried out against the background of the usual for the patient water and food regime. The first portion received at 6 am is poured, after which the patient collects urine every three hours in separate cans. If there is no urine for three hours, an empty jar is sent to the laboratory. If the patient has polyuria (a significant amount of fluid is allocated), and he lacks one can of the next portion, add an extra jar on which the portion number is indicated.

Analysis of urine in Zimnitskiy - norm and pathology

In each container, the amount is measured and compared in day and night portions, and the relative density is determined. It is considered as a day time portion from 6 to 18, night - from 18 to 6 o'clock in the morning. The volume of urine in individual portions can be from 50 to 250 milliliters, and the relative density is from 1005 to 1028. Normally, the diuresis allocated in the daytime exceeds the night time. The ratio of day to night is from 4: 1 to 2: 1. That is, one urination per night is allowed. An increase in nocturnal diuresis, called nicturia, indicates the development of symptoms of renal failure. But this symptom should be considered simultaneously with the level of relative specific density of urine. Normally, this indicator should not be stably low in all assay portions. Usually in the morning portions, which reveals the analysis of urine by Zimnitsky, determine a high relative density. A stably low density, called isohypostenuria, is an important symptom of kidney failure.

Thus, polyuria with nicturia and low relative density are typical signs of functional kidney failure. Analysis of Zimnitsky allows you to determine the kidney failure at the initial stages of its development and timely appoint the necessary therapy.