The accuracy of the second morning urine test for nephritis is relatively lower, and it is better to use the first urine in the morning for examination.
If you apply the first urine in the morning for examination, due to the longer retention time of urine in the bladder at this time, there are relatively more active components, and the probability of a positive result is relatively higher, so it is better to use the first urine in the morning for examination.
The second morning urine, if you do not drink water beforehand, will be due to the water restriction time is too long, easy to appear urine concentration, resulting in false positive results; if you drink a lot of water beforehand, and there may be urine is diluted, resulting in false negative results.
If the patient can not hold urine can empty the bladder once in the middle of the night, and then apply the morning urine for examination, or get up and use a clean container to store tens of milliliters of morning urine as soon as possible to send the test.
Patients with nephritis are advised to consult a regular hospital in time and follow the doctor’s instructions for standardized examination and treatment.