The urine sediment test only requires the retention of appropriate urine, and its requirements: 1. It is recommended that the first or second urine in the morning be retained, as the concentration of solutes in the urine is relatively high and the probability of detecting suspicious diseases is relatively high. 2. It is recommended that the urine specimens be sent for examination within 30 minutes, because if the urine is left for a long time, corruption or decomposition may occur, resulting in inaccurate results. 3, you can also take urine when the symptoms of the disease are most serious, such as in the process of urination when the pain is most serious, in the process of urination when the urine color is red or the most turbid state, take the urine at this time to test the possibility of positive disease is also higher. 4, it is recommended that in the process of taking urine as much as possible to choose the middle section of the urine for testing and examination, that is, in a urination process, not the first and last end of the urine. The reason for this is that it is relatively unlikely that the urine will be artificially contaminated.