A decrease in the plasma volume due to dehydration or upper GI (gastrointestinal) bleeding.Urea level in the blood is directly related to nutrition, protein metabolism/catabolism and renal functionality.Ī high level of BUN in the blood may be due to: Urea is a marker for kidneys and liver activity. Maximum values increase with the age and are higher in elderly people.

Age is an important factor to normal ranges.If your test is expressed in urea you must convert the values from urea to BUN or the information given will not be specific for your case. Warning: In this page we talk about BUN levels. It important to know if the values measured are the BUN levels used in the US and other countries or instead the values measured are the total urea used in Europe and around the world.There are some circumstances to take into account about BUN normal ranges in the blood: Your doctor will study the results along with your medical record, screenings, physical condition, symptoms and any other relevant information about your situation. There may be also slight differences in the normal levels according to age, gender, race or ethnic origin, geographic region, diet, type of sample and other relevant status.

These ranges depend on the makeup of the local population, the technologies used and the accuracy of the measurement. Each laboratory must establish its own normal ranges for BUN in the blood.

Labcorp normal ranges bun