1.why the morning urine is good?
The urine is produced by glomerular filtration and tubular reabsorption and excretion, and one of the advantages is that, after a night of renal tubular reabsorption of urine, has been highly concentrated, and often acidic, visible component in urine is not easy to be damaged, and "enough", so most suitable for check.
The two advantage is that, when get up in the morning, less affected by food, the spirit of their own factors, such as the amount of water intake, and the composition of the urine less damage, so the result is more accurate. It is generally use the morning urine to examination. The disadvantages of morning urine is leaving the process is really troublesome. Hospitalized patients are still good, the patient who are not at hospital often stored out of body for too long, poor storage conditions, may also affect the results.
At the same time, urine stay in the body for too long, some people think it will cause some damage to cell components.
So for some doctors, there is another understanding of morning urine. They called the first time urine morning urine “overnight urine”, and after "overnight urine" 2-3 hours is called "morning urine". Some people call it "the two morning urine".
2. if not "morning urine" and have what effect?
First of all, such as the most common urine routine test, it can reflect the state of urine, is the most basic examination; but it is not a very accurate examination, often used for qualitative. For example, to determine whether the person is "young", "middle-aged", or "older", does not require accurate to a few years old. In this case, deliberately pursue the size of this person's month, there is no sense.
The second is to look at the purpose of the inspection, such as "urine sugar", empty stomach to stay urine is the best . And if you check the urine protein, morning urine can reduce the impact of activity on the urinary protein, but the urine was random choice also have no great impact.
In some special cases, such as suspected urinary tract infection, urine culture for inspection, in order to improve the positive rate of culture, even the difficulties, we must strive to overcome, try to stay "first morning urine".
3. compared to the morning urine, the doctor is more concerned about “clean midstream urine"
First clean the vulva, and then stay in the middle of a section of urine. Avoid external contamination.
At the same time, as far as possible to avoid exercise before taking urine , women should avoid menstruation.