What is midstream urine?

I believe people pay great attention to their physical condition, and when they have a disease, they will take various measures to check it. I believe everyone is familiar with urine tests. This is a very common way of checking the body nowadays. The internal conditions of people's bodies can be understood based on the values. When testing urine, one thing to note is that you need to collect midstream urine for testing. So what is midstream urine?

Midstream urine refers to the process of collecting urine during clinical urine culture. When the urine is collected, the first part of the urine is allowed to flush the urethra clean, and then the middle part of the urine is collected as a sample for culture. The purpose is to prevent urine from being contaminated.

Cultivation methods

Collecting midstream urine for culture is a basic nursing operation routine. The correct method of collecting urine is as follows: on the eve of collecting urine, instruct the patient to wash the vulva with soap and warm water (males should focus on washing the glans penis and coronal sulcus). Before collecting urine, wash the vulva with 1:5000 potassium permanganate solution, then disinfect the urethral opening with a cotton swab dipped in disinfectant, and then instruct the patient to urinate. Place the midstream urine in a sterile test tube. The mouth and stopper of the sterile test tube must be disinfected with flame before and after collecting urine.

First, the urine should be fresh in the morning as much as possible. Secondly, when urinating, the urine should be discharged in a straight line without interruption. Finally, the urine volume should not be less than 10ml.

Urine examination is a very important examination item, but some people may not know that it is best to collect midstream urine.

The so-called midstream urine refers to urine collected in the middle of urination. If the urine sample is not midstream urine, it will have a certain impact on the test results, such as making the pH value of the urine higher or lower. Although some people know the concept of midstream urine, they are not quick enough and do not know whether the urine sample they collected is midstream urine.

When taking a urine sample, you can control your urination speed and try to go slower, so that it is easier to collect midstream urine. Generally speaking, urine that is produced 1 second after urination can basically be considered midstream urine.

In addition, the following points should be noted during the retention process:

1. When collecting urine, you should use a clean and dry container. The physical examination center provides you with disposable urine cups and urine test tubes.

2. The collected urine sample should be sent for examination within 1 hour to avoid changes in pH that may affect the formed elements in the urine, such as the destruction or shrinkage of red and white blood cells. In particular, only fresh urine samples are required when performing microscopic examination of urine red blood cells.

3. Collect morning urine: It is generally most appropriate to collect morning urine for routine urine examination. Morning urine refers to the first urination when you get up in the morning. It is relatively concentrated and contains more formed components than the diluted urine during the day. It is easier to detect abnormalities in the urine and can also avoid the influence of factors such as diet, drinking water, and exercise.

4. When doing routine urine tests, women should avoid doing it during their menstrual period to prevent vaginal secretions from mixing into the urine and affecting the test results.