The blood urea nitrogen (BUN) test is a measure of the amount of nitrogen in
the blood in the form of urea, and a measurement of renal function. Blood urea
nitrogen (BUN) and creatinine are two important indexes of kidney functions.
Sometimes people can find high blood urea nitrogen in a test. Read on to learn
more about the causes of high blood urea nitrogen (BUN).
Normally, blood urea nitrogen (BUN) before a dinner would be 3.2-7.1mmol/L
(9-20mg/d1). Various kidney parenchyma lesions such as Glomerulonephritis,
interstitial Nephritis, and acute or chronic Renal Failure could cause high
blood urea nitrogen (BUN). Other causes which are not kidney diseases can also
cause high blood urea nitrogen.
Causes of high blood urea nitrogen (BUN)
Acute nephritis, chronic nephritis, severe pyelonephritis, tuberculosis,
congenital Polycystic Kidney Disease or kidney neoplasms can cause it. End-Stage
Kidney Disease has close relation with blood urea nitrogen. The severer of
End-Stage Kidney Disease is, the higher the blood urea nitrogen is. For
instance, BUN can be more than 9mmol/L when you are in a period of azotemia. But
BUN will be more than 20mmol/L if you enter end stage of kidney disease.
1. CHF (congestive heart-failure), severe burn, shock, upper gastrointestinal
bleeding, dehydration, severe infection, diabetic acidosis, declining of
function of adrenal cortex, hepatorenal syndrome and so on can cause high urea
nitrogen.
3. Obstruction of the urethra, stones in both sides of ureter caused by
prostatic hyperplasia or compression of tumor can lead to high urea
nitrogen.
4. If you eat foods which contain high protein could cause high urea
nitrogen. You just need to change your diet properly. Blood urea nitrogen will
become normal again.
Therefore, we need to make sure of the causes of high blood urea nitrogen
(BUN) by seeing a doctor and maybe more tests are needed. Then find proper
treatment for it.
