What is Renal Failure Azotemia

Azotemia is a biochemistry noun, which has both generalized and narrow concepts.

Generally speaking, if urea nitrogen, non protein nitrogen or creatinnine in blood exceeds normal range, the stage of kidney disease can be called Azotemia. If kidney diseases are not treated for a long time and the renal function has been damaged, excreting obstruction of nitrogen will occur. The nitrogens accumulate in blood and it is the result of Renal Failure.
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However, if a healthy person has large amounts of high-protein food, there will be much nitrogens pile up in a short time though his/her renal function is normal. This accumulation of nitrogens is called Transient Azotemia. Besides, Nephrotic Syndrome patients with edema and oliguria may also have Transient Azotemia, but it is not Renal Failure. After using diuretic, patients' urine volume increases and urea nitrogen turns to normal. There is a case can explain Azotemia well. What Medicines Can Help Kidney Failure without Dialysis
One Nephrotic Syndrome patient who is a young man was ever diagnosed with Renal Insufficiency according to his urea nitrogen of 14.2mmol/L (43mg%) in blood . However, after observing, we found symptoms that occured to him, such as little urine (about 600ml/day) and moderate edema on whole body. We suggested him to use diuretics and then the blood urea nitrogen turned to 6.4mmol/L (18mg%). The number proved that the patient didn't get Renal Insufficiency but Transient Azotemia. Actually, there are some doctors who ignore Azotemia on purpose with aims at showing their curable effects in treating Chronic Renal Failure. Certainly, there are also ones who do not know the existence of Azotemia.
The narrow sense of Azotemia refers to the Chronic Renal Insufficiency stage of kidney diseases. In this stage, urea nitrogen and creatinine levels in blood exceed the normal range, and it is called the stage of Azotemia or early-stage of Uremia. Is There Any Alternative Treatment Other Than Dialysis

It is recorded on common medical books that normal value of urea nitrogen in blood is no more than 7.1mmol/L (20mg%), while serum creatinine is no more than 176.8mmol/L (2mg%). Actually, to the people with normal renal function, urea nitrogen in blood is no more than 5.3mmol/L (15mg/L), while serum creatinine is no more than 132.6mmol/L (1.5mg%). When urea nitrogen in blood is 5.7~7.1mmol/L (16~20mg%) and serum creatinine is 141.4~176.8mmol/L (1.6~2mg%), patient's renal function has been abnormal. If the kidneys can be compensatory and Azotemia does not occur, this stage is called Renal Insufficiency Compensatory stage.