The first and foremost thing that is usually done with urine routine is to retain a urine specimen. The best urine specimen is to use fresh morning urine. Usually very little or no water is drunk at night, so the urine is stored in the bladder for concentration, there is easy for us to find out if there are disease factors present and improve the positive detection rate. If the urine at other times of the day is generally best left in the middle. 1, urine routine examination, retain no less than 10 ml of urine. 2, if the woman is in menstruation, it is best not to do this test, to avoid vaginal secretions mixed into the urine, affecting the correctness of the test results. 3, it is best to take the middle urine. Many patients with kidney disease have asked why it is necessary to consciously keep the middle section of urine in the routine urine examination. According to the sequence of urination, urine can be divided into anterior, middle and posterior segments. Because the anterior segment and posterior segment urine are easily contaminated, therefore, when doing routine urine and urine bacteriological examination, middle segment urine is usually retained. 4.The urine should be retained in clean and dry containers, i.e. disposable urine cups and urine test tubes provided by the hospital. 5, the retained urine should be sent to the laboratory for examination as soon as possible, because too much time will have glucose decomposition by bacteria, tubular destruction, cell lysis and other problems, affecting the accuracy of the test results. 6, urine specimens must be fresh, otherwise after a few hours of parking, red blood cells can be destroyed, white blood cells can be destroyed and pus urine disappears. 7, urine specimens must be clean. Women should wash their vulva, do not mix in the leukorrhea. If there are a large number of polygonal epithelial cells in the urine sediment, it may have been mixed into the leucorrhoea, it is appropriate to keep a clean urine specimen for re-examination. 8, urinary tract infection pus urine is often intermittent, so it is appropriate to repeatedly check several times before drawing conclusions. 9, after the use of antibacterial drugs, can affect the accuracy of the examination. Therefore, when doing routine urine examination, pay attention to the correct specification of collecting urine specimens, is the key to ensure the accuracy of routine urine examination results.