Usually, we can see a value about urea nitrogen and serum creatinine (Scr,High Creatinine Levels) in the blood test report. Usually there is a disparity between adults and child, and adults has a higher value as per the reference range.
For adults, the normal value of urea nitrogen is under 5.36 μmol/L(15mg/dL). Still some others might have an exception that their urea nitrogen is higher, but lower than 7.14μmol/L(20mg/dL). If urea nitrogen exceeds 8.9μmol/L(25mg/dL), it can be called Azotemia. In this case, glomerulus function is usually impaired. If the value is over 28.6μmol/L(80mg/dL), patients is probably to present Uremia.
As to Scr, the normal level for male is 70-106μmol/L(0.8-1.2mg/dL), and 53-80μmol/L (0.8-1.2mg/dL). According to the content of Scr, we could categorize the degree of renal damage as below:
1. Mild damage is identified at the level of 132.6-221μmol/L(1.5-2.5.2mg/dL)
2. Middle impairment is identified at the level of 229.8-397.8μmol/L(2.6-4.5mg/dL).
3. Severe impairment is certified at the level of 397.8μmol/L.
As we know, Scr is mainly from muscle metabolism and only a little them is from diet. The level of Scr is actually reflective to the renal function. The higher level Scr is, the worse renal function become. But kidney has such a striking compensation ability that no any discrepancy occur in the level of Scr in the early stage. Only when renal filtration function declines less than 50%, could Scr alter obviously. In other words, renal function must be impaired severely if there is conspicuous discrepancy in Scr value.
Certainly, there are some differences about the reference range of those indicators, in different country, different gender and different age. Patients should have an objective conception about this. You can consult our real-time online expert if you have confusion about your test reports, we give you professional and authentic instruction.
