Urinalysis is one of the main types of laboratory research. In order for its results to be as correct as possible, it is necessary to approach the matter with responsibility, because otherwise the patient risks receiving a referral from the doctor for a second analysis, or, even worse, an incorrect diagnosis and treatment.
The amount and technique of urine collection depends on the type of study. For example, in order to pass a general analysis, you will need the first morning urine. First, you need to make a toilet of the external genital organs, without using soap or other hygiene products - this can affect the result of the analysis.
Collect at least 100 milliliters of urine. First, you need to urinate in the toilet for a few seconds, and then into the container, which will then go to the laboratory. The collected urine should not be stored for several hours - its chemical composition may change.
To collect urine for analysis according to Nechiporenko, it is necessary to collect 50-100 milliliters of urine in a clean container (ideally, if it is a plastic laboratory cup or container with a tight-fitting lid purchased in a pharmacy). If it is not possible to buy a special container, an ordinary glass jar of the appropriate size will do. The bank must first be thoroughly washed and dried.
If a urine sample is to be passed to an infant, you can use a pediatric urine collection bag available from pharmacies. This device allows you to collect urine from both boys and girls.
For most tests, it is usually required to collect 50-100 milliliters of morning urine.
24-hour urine analysis
The main purpose of the analysis of daily urine output is to establish the total volume of excreted urine in order to assess the level of kidney activity. Sometimes patients preparing for this study are asked to additionally record the amount of water drunk per day, including that absorbed from food.
When a patient is to undergo a daily urine test (the so-called daily urine output), it is necessary to collect all the urine excreted by him within 24 hours in one container. This analysis will make it possible to determine how much creatinine the kidneys can filter out during this time, as well as daily protein losses and indicators of secretion of hormones and minerals. Usually this analysis is performed in a hospital. The patient can urinate either directly into the container or pour portions into it after the next urination. The container must be stored in a dark and cool place for 24 hours, and then immediately delivered to the laboratory for research.
If antibiotics were taken shortly before the test, it is necessary to warn the doctor, as this may affect the test results.
Urine analysis for drug detection
This study is usually done with test strips. For the analysis in this case, no more than 50 milliliters of urine is required. No prior preparation is needed. The urine must be collected in a dry container, and then transferred to the laboratory for analysis. Results are usually ready in 10-15 minutes.