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 A Test For Blood Urea Nitrogen(BUN)

A Test For Blood Urea Nitrogen(BUN)

The Blood Urea Nitrogen(BUN) test is used to assess the level of urea nitrogen in a sample of the patient’s blood. And Blood Urea Nitrogen test reveals important information about how well your kidneys and liver are working.
 

What is Blood Urea Nitrogen?

Urea is a metabolism of protein and is formed in the liver. And then urea builds up in the blood i the form of urea nitrogen. In healthy people, urea nitrogen is removed out of the body by the kidneys and leaves body through urine, while if patients’ kidneys are not functioning properly or if the body consumes large amounts of protein, the BUN level will rise. If the patients have serious liver disease, the BUN level will drop.
 

Therefore, a BUN test is used to measure how well your kidney or liver is working.
 

What is the value of BUN?

The normal levels of BUN are 5-18mg/dl for children; 7-18mg/dl for adults; and 8-20mg/dl for the elderly.

Abnormal results mean BUN levels can be too low or too high.
 

Abnormal low BUN

Low levels of BUN may be caused by overhydration, malnutrition, liver damage or disease, or use of corticosteroids. And low BUN also occur in early pregnancy.
 

High levels of BUN may reveal the following information, including kidney disease or kidney failure; blockage of the urinary tract by a kidney stone or tumor; a heart attack or congestive heart failure, dehydration; shock; fever. Of course, other factors can also lead to high levels of BUN such as late pregnancy or protein-rich foods intake. However, when BUN level is higher than 100mg/dl, it indicate severe kidney damage.
 

Blood Urea Nitrogen Test

A blood creatinine test is used to measure the creatinine level in the blood. This test measures whether your kidneys are functioning completely and a high creatinine level indicates poor kidney function. Blood Urea Nitrogen and creatinine tests are always used together to determine the ratio of BUN to creatinine. This is the ratio helps your doctor find the cause of poor kidney function and the causes may be caused by dehydration, malnutrition or kidney disease or failure.
 

Low or high levels of BUN are both not good for your health. Therefore, once your medical report shows abnormal, you should take effective treatment to keep it under control.

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