The correct retention of urine to help obtain the correct urine test results 1, the morning urine is the most ideal The first urine specimen in the morning is the most ideal, because the morning urine is more concentrated and acidic, the organic components are relatively more and complete, no dietary interference, does not affect the chemical determination of urine. 2. Urine specimens should be examined within one hour. Urine specimens should be examined within one hour to avoid dissolution and destruction of the cellular components in the urine by the specific gravity and acidity of the urine or crumpling and deformation due to prolonged placement. 3, do not retain urine during menstruation female patients do not retain urine specimens during menstruation, must avoid mixing with menstrual blood and mistaken for hematuria. 4.Please keep the urine in the middle part of the urine It is best to keep the urine in the middle part of the urine after washing the vulva to avoid mistaking it for a bacterial infection. 5. Pay attention to the cleanliness of the urine container. The urine specimen container must be clean and dry to avoid interference with the test results.