How to collect 24 hours of urine, as follows: 1, the patient needs to start timing after the first day of urination, such as the morning after the completion of urination at 8 o’clock, and wait for the second day at 8 o’clock after the patient urinates again, collect the urine in a complete 24 hours; 2, each time after the completion of urination needs to be collected in a graduated container, at the same time need to add a certain amount of preservative, and the urine After collecting the urine for 24 hours, the total amount of urine for 24 hours should be counted, such as 1800ml or 2000ml. At the same time, you need to mix the urine, and then take about 50ml of the urine and send it to the laboratory for relevant laboratory tests, but not all 24 hours of urine to the laboratory, when sending the specimen to mark the exact value of 24 hours of urine.