Purpose of the study. This analysis is prescribed to clarify the ability of the kidneys to concentrate and dilute urine, to identify hidden edema. The study may be needed if you suspect the development of preeclampsia, renal failure, infections of the urinary system, as well as diabetes.
Rules for collecting urine. For urine analysis according to Zimnitsky, urine is collected during the day (24 hours) in 8 containers (jars), while the amount of fluid drunk is necessarily taken into account (the pregnant woman writes down how much fluid she drinks during the day, taking into account soups, fruits and vegetables). At 6 am, a woman urinates into the toilet, then all subsequent urine is collected in jars.
8 servings total:
• 1 portion - from 6-00 to 9-00 hours,
• 2 portion - from 9-00 to 12-00 hours,
• 3 portion - from 12-00 to 15-00 hours,
• 4 portion - from 15-00 to 18-00 hours,
• 5 portion - from 18-00 to 21-00 hours,
• 6 portion - from 21-00 to 24-00 hours,
• 7 portion - from 24-00 to 3-00 hours,
• 8 portion - from 3-00 to 6-00 hours.
Banks are signed and delivered to the laboratory.
Investigated parameters. The amount and specific gravity of urine in each portion is estimated. Normal kidney function is characterized by:
• the volume of daily urine is about 1.5 liters;
• the predominance of daytime urination over the night;
• urinary excretion of approximately 70--80% of the liquid drunk per day;
• the specific gravity of urine in at least one of the portions is not lower than 1.020--1.022;
• significant fluctuations during the day the amount of urine in individual portions (from 50 to 400 ml) and the specific gravity of urine (from 1.003 to 1.028).
Deviations from these standards indicate a violation in the work of the kidneys.