Urea as urea nitrogen (BUN) is one of the parameters in the biochemical test - it is used to assess the functioning of the kidneys. Check what is the norm for urea nitrogen (BUN) and what the above-normal result may indicate.

Urea as urea nitrogen (BUN): what is it?

It is produced exclusively in the liver and excreted by the kidneys. It is formed when a protein is broken down. Blood chemistry tests are ordered when kidney problems are suspected. Urea nitrogen testing is also used to identify and control:

  • acute nephrotic syndrome
  • of the Alporta team
  • Diabetic Nephropathy
  • epilepsy
  • interstitial nephritis
  • type 2 diabetes
  • malignant hypertension
  • secondary amyloidosis
  • hemolytic uremic syndrome
  • medullary kidney cancer.

Urea as Urea Nitrogen (BUN): Standards

The reference values ​​for urea nitrogen (BUN) are 7-18 mg / dL, but it should be remembered that with age the ratio of the two variables: production and excretion increases.

Urea as urea nitrogen (BUN) above normal

The increase in urea as urea nitrogen (BUN) may be due to a diet rich in protein. In addition, elevated BUN levels can result in:

  • fever
  • sepsis
  • gastrointestinal bleeding

In addition, the cause of the increase in urea concentration may also be reduced excretion of it from the body due to renal failure or narrowing of the ureters.

Urea as urea nitrogen (BUN) below normal

A low urea nitrogen level indicates:

  • liver failure
  • low-protein diet
  • malnutrition
  • excess fluid in the body
Agnieszka Paculanka Editor for over twenty years, writing about he alth and beauty. Participant of scientific and training workshops for journalists from the Quo vadis medicina? and specialist seminars for journalists from the Medicinaria series organized by the Journalists for He alth Association.

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