This is a routine blood test that checks for the amount of urea nitrogen released in the blood by liver or urea nitrogen remaining in the blood after it has been filtered by kidneys.
It helps in
This test is performed
The test result is normal, if levels are 7–20 mg/dL. It means
The test results are high, if levels are less than20 mg/dL. It means
In case a patient has existing kidney disease, BUN levels eventually normalizes or remain constant, which indicate no further worsening of kidney disease or adequate response to therapy.
Low BUN levels are not common and are not a cause of concern, but they may be seen in patients who are malnourished or when they are over hydrated.