Synonyms/Also Known as
BUN, Urea Nitrogen
Creatinine, Creatinine Clearance, eGFR, Urinalysis, Renal Panel, Cystatin C, Urine Albumin and Albumin/Creatinine Ratio, Beta-2 Microglobulin, Urine Protein
Why get tested?
To evaluate kidney status, to diagnose and monitor the effectiveness of treatment of kidney disease or renal damage.
When to get tested?
Used as part of a renal function test, when a person has signs and symptoms related to kidney diseases, to monitor treatment for renal disease or damage.
Test preparation needed
No special preparation required
About The Test
How is it used
1. What are the other additional tests required?
In addition to BUN and Creatinine, renal function tests (RFT), serum electrolytes and imaging techniques like USG abdomen and CT scan may be done to assess the renal status.
2. How does BUN levels vary with age?
BUN levels increase with age. BUN levels are low in young babies and healthy young adults. BUN levels are slightly high in old people (age>60 years).
3. What is BUN/Creatinine ratio?
Ratio of BUN to creatinine is usually between 10:1 and 20:1. This ratio increases in congestive heart failure, dehydration, GI bleeding and increased dietary protein. This ratio decreases in liver diseases and malnutrition.
4. What does the results of BUN mean?
Normally the levels of BUN may vary, but usually high blood urea nitrogen (BUN) levels are a sign of improper functioning of kidneys. High BUN levels can also be due to dehydration, burns, high protein diet and use of certain medications, etc.