This is to find out the functions and overall condition of the liver and kidneys. The BUN and creatinine test results are combined by the doctor to determine the BUN to creatinine ratio. Photo Source: What is a BUN creatinine ratio and its significance? Picture 2: BUN and creatinine ratio is measured using the above formula.

If the level of creatinine is high, then it indicates that there is something wrong with your kidneys. Ideally, the level of creatinine remains constant throughout the day. The muscle mass of a person defines the rate of creatinine formation. It is transported through the bloodstream and filtered in the kidneys and excreted through the urine. (1, 2, 3) Creatinine TestĪ creatinine is a molecule produced by muscle metabolism. There could be something wrong with your kidneys that need to be addressed properly and timely. If the urea in the blood is abnormally high, it is an indicator that the kidneys are not functioning well. The liver continuously produces urea and so it is just normal to have a small amount of urea in the blood. The function of the kidneys is to filter the urea so that waste products will be removed from the body through urination. The BUN test measures the level of nitrogen in the blood.ĭoctors order this test to assess the functions of the kidneys and liver. Understanding the difference between BUN and creatinine test and their relationship BUN TestīUN stands for Blood Urea Nitrogen. Image 1: The standard unit of measurements for BUN and creatinine. A BUN creatinine ratio is a blood work done to detect acute or chronic renal disease/failure.īoth BUN and creatinine are filtered in the kidneys and excreted through urination and they are a perfect parameter for identifying the overall functions of the kidneys.

Normal range bun