Blood test to check kidney function mainly look at urea nitrogen, creatinine, uric acid and other related indicators.
1.Urea Nitrogen: Adults 3.2~7.1mmol/L; infants and children 1.8~6.5mmol/L. Blood urea nitrogen is the end product of protein metabolism, when renal function is impaired, the glomerular filtration rate decreases, and blood urea nitrogen concentration increases.
Increased urea nitrogen can be seen in eating a lot of protein food, but also in pathological changes such as glomerulonephritis, pyelonephritis, interstitial nephritis, renal tumors and so on.
2. Creatinine: the normal range is 53~106μmol/L for men and 44~97μmol/L for women. Blood creatinine is the metabolic end product of creatine in muscle tissue. When the renal parenchyma is damaged, the glomerular filtration rate decreases and the blood creatinine concentration increases, so the blood creatinine concentration can be used as an indicator of the impaired glomerular filtration rate.
3. Uric acid: normal male is 150~416μmol/L, female is 89~357μmol/L, female is close to male after menopause.
Uric acid is the metabolite of purine in nucleoprotein and nucleic acid. In the clinic, it is mostly manifested as hyperuricemia, which is associated with gout and manifests as chronic arthritis and joint deformity. Uric acid excretion is impaired in renal insufficiency and decreased glomerular filtration rate, causing hyperuricemia.
If patients need to undergo renal function tests, it is recommended to go to a regular hospital to have the test results prescribed and evaluated by a professional doctor.