Narrow renal function tests include urea, creatinine, uric acid, serum cystatin C, etc. Broad renal function tests also include routine urinalysis, 24-hour urinary protein quantification, and ultrasound of the urinary tract.
The narrow sense of renal function test is to draw blood to check urea, creatinine, uric acid, serum cystatin C and other items, these indicators can reflect the renal filtration function, and the elevation of these indicators usually suggests that kidney damage.
Early stage of many kidney diseases mainly manifested as abnormal urine routine, such as hematuria, proteinuria and decreased specific gravity of urine, etc. Ultrasound of the urinary system can clarify the location and size of the kidneys. Urine routine, 24-hour urine protein quantification and urinary ultrasound are kidney function tests in the broad sense.
Renal function tests should be performed in regular hospitals under the guidance of specialized physicians.