Proteinuria is caused by the loss of protein in the human blood into the urine, and the protein is excreted through the urine. Patients often develop proteinuria due to problems with excretion or absorption. Proteinuria is common in patients with nephritis and cancer patients.

Proteinuria is a typical symptom of chronic kidney disease. The cause of proteinuria is closely related to the barrier function of the glomerulus. Extended information

If any of the following items causes proteinuria, it is recommended to undergo in-depth examination.

Pseudoproteinuria is common in the following situations:

1. Blood, pus, inflammation or tumor secretions, menstrual blood, leucorrhea, etc. are mixed in the urine. Routine qualitative examination of proteinuria All can show positive reaction. A large number of red blood cells, white blood cells and squamous epithelial cells can be seen in the urine sediment without casts. After the urine is centrifuged or filtered, the protein qualitative test will be significantly reduced or even turn negative;

2丶 After the urine is left for a long time or cooled, salt crystals can precipitate, making the urine white and turbid, which can easily be mistaken for proteinuria. However, heating or adding a little acetic acid can make the turbid urine clear to help distinguish it;

3. If the urine is mixed with semen or prostatic fluid, or lower urinary tract inflammatory secretions, the urine protein reaction may be positive. In this case, the patient has symptoms of lower urinary tract or prostate disease. Sperm and more squamous epithelial cells can be found in the urine sediment, which can make the difference;

4. Lymphuria, which contains less protein, is not necessarily It is chylous;

5. When some drugs such as rifampicin and Sandonian are excreted from the urine, they can make the urine turbid and similar to proteinuria, but the qualitative reaction of protein is negative.

Reference materials

Baidu Encyclopedia—Proteinuria