Urinalysis and ultrasound of urinary system are normal, but still cannot exclude kidney disease, you need to improve the kidney function test, or even do isotope nephrogram, angiography, etc. to exclude kidney disease.
Kidney disease includes stone disease, infectious disease, immune system disease, tumor disease, etc. Regardless of which type of disease, most of them will show abnormality in urinalysis and ultrasound of the urinary system, but they can’t completely exclude kidney disease.
A small number of diseases are more insidious and can show normal urine test and urinary system ultrasound. For example, in milder cases of cryptogenic nephritis, there may be an increase in urinary occult blood or a slight increase in red blood cells during the onset of the disease. When the disease is in remission, the urinary occult blood or red blood cells will disappear and become normal, at this time the patient is in the recovery period, but it does not mean that there is no kidney disease.
So even if the urine routine and ultrasound are normal, kidney disease can not be completely ruled out, and further relevant examinations need to be improved. With the help of doctors, exclude kidney disease.