Is it necessary to have morning urine for routine urine test

When doing a routine urine test, morning urine is relatively better, because the advantage of morning urine is that it is more concentrated, and the formed components are not easily destroyed, so the test results will be more accurate, and it will not be affected by external factors such as diet and exercise. Therefore, when doing a routine urine test, morning urine is of course more appropriate, and it is best to do it on an empty stomach.

1. Urine is produced by blood being filtered through the glomeruli, reabsorbed by the renal tubules, and excreted. The advantage of morning urine is that after a whole night of tubular reabsorption, the urine has become highly "concentrated" and is often acidic. The formed components in the urine are not easily destroyed and are relatively "abundant", making it most suitable for examination.

2. The first time you wake up in the morning is not easily affected by factors such as diet and exercise. The disadvantage of morning urine is that the collection process is indeed troublesome. The situation is still okay for inpatients, but for outpatients, urine specimens are often stored outside the body for too long and in poor conditions, which may also affect the results. At the same time, some people believe that if urine stays in the body for too long, it will also cause damage to some cellular components. So some doctors have another understanding of "morning urine". They call the first urination in the early morning "overnight urine", and the urine collected 2-3 hours after "overnight urine" "morning urine". Some people also call it "second morning urine."

3. For example, the most common routine urine test can reflect many conditions of urine and is the most basic test; but it is not a very precise test in itself and is often used for "qualitative" testing. For example, to determine whether a person is a "young person", "middle-aged person", or "elderly person", it is not necessary to be precise to the age. In this case, there is not much point in deliberately pursuing the size of this person's month.

4. In some special cases, such as suspected urinary tract infection, urine culture test is required. In order to increase the positive rate of culture, even if there are many difficulties, we must try our best to overcome them and try to collect the "first urine in the morning". Compared with "morning urine", doctors care more about "clean midstream urine". Clean the vulva first, then "urinate a little, leaving the middle part for urine." Avoid external contamination. At the same time, try to avoid exercise before urinating, and women should avoid it during menstruation.