In the clinic, there are often patients with routine urine reports for their doctors to read, and many of them are impossible to read at all. The reason is that urine specimens are not kept in a standard way. Commonly, the urine specimen is left during menstruation, the urine taken is not intermediate urine, or the urine volume is too small, etc. As a result, the test is wasted, wasting time and money and delaying the diagnosis. This is partly due to the doctor and partly due to the patient. As a patient, it is beneficial if you understand the requirements for urine specimen retention earlier. In general, the following points should be noted when retaining urine: 1. The container should be clean and preferably disposable. 2, must be the middle segment of urine. That is, each time urine can be divided into three parts: anterior, middle, and posterior, and the middle section of urine should be taken. Or about halfway through urination, keep the urine. 3. There should be enough urine in the bladder. Otherwise, the amount of urine is too small, and it is not good to divide the urine into the anterior, middle, and posterior sections. More importantly, the outer third of the urethra even healthy people have some protein, white blood cells, etc. When the volume of urine is too small, it can not be flushed clean, affecting the results of laboratory tests. Therefore, the volume of urine should be more, generally about 300 ml of urine in the bladder, or more than 300 ml is better. 4, the amount of urine retained should be sufficient. Usually more than 10 ml should be retained. 5. It is best to urinate in the morning. Generally, you should prohibit any drinks and food after 8 or 9 p.m. and get up the next morning for the first time. 6. It must be fresh urine. This means that the urine should be kept in the hospital. 7. It is best not to do it during menstruation and 3-5 days before and after menstruation. Women should also pay attention to clean the vulva to prevent leukorrhea from mixing with the urine. Of course, I’m afraid there is more than that to pay attention to. But the above few are clinically easy to ignore, if we pay more attention, it will allow us to see less detours and diagnose the disease early.