The main indicators of red blood cells in routine urine laboratory test are occult blood and high magnification red blood cell count (RBC), the amount of red blood cells in a normal routine urine examination is relatively small, generally there can be 0 to 2 red blood cells per high magnification field under the microscope, if higher than 3 indicates an increase in red blood cells, for hematuria.
Hematuria is a very common phenomenon in clinical practice. There are many factors that affect red blood cells, and the consumption of blood-containing foods the day before the physical examination, drug causes, excessive exercise, or women’s menstrual periods can cause an increase in routine red blood cells in urine.
After excluding physiological factors, it can be caused by diseases, such as urinary stones, urinary tract infections, acute urethritis, acute cystitis, prostatitis, and other diseases of the urinary bleeding system, which can lead to increased red blood cells in the urine.
In addition, damage to kidney function, such as acute glomerulonephritis, can lead to the presence of higher numbers of red blood cells. Sometimes it can also be an indicator of cancer, and in the case of painless hematuria, it is by 40% likely to be kidney cancer and 50% likely to be bladder cancer.