concept mappiing for BUN

Expert Solution

BLOOD UREA NITROGEN:-

Blood urea nitrogen (BUN) is a medical test that measures the amount of urea nitrogen found in blood. The liver produces urea in the urea cycle as a waste product of the digestion of protein. Normal human adult blood should contain 6 to 20 mg/dL (2.1 to 7.1 mmol/L) of urea nitrogen. The test is used to detect renal problems. It is not considered as reliable as creatinine or BUN/creatinine ratio blood studies.

Generally, a high blood urea nitrogen level means your kidneys aren't working well. But elevated blood urea nitrogen can also be due to: Urinary tract obstruction. Congestive heart failure or recent heart attack.

The normal BUN level is between about 7 and 21 milligrams per deciliter (mg/dL). Unless this level is greater than 60 mg/dL, it may not help your healthcare provider measure your kidney health. A better measure is the ratio of BUN to creatinine found in your blood.

The main causes of an increase in BUN are: high protein diet, decrease in glomerular filtration rate (GFR) (suggestive of kidney failure), decrease in blood volume (hypovolemia), congestive heart failure, gastrointestinal hemorrhage,^[5] fever, rapid cell destruction from infections, athletic activity, excessive muscle breakdown, and increased catabolism.

Nightingale answered 2 years ago

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