Kidney Blood Test Levels. If your gfr falls below 30 you will need to see a kidney disease specialist called a nephrologist. The normal ranges for a bun test is between 7 20 mg dl.
Creatinine levels of 2 0 or more in infants and 5 0 or more in adults may indicate severe kidney damage. It is then flushed out of our bodies through the urine. The kidneys help keep the blood creatinine stable and these levels go up if there is some problem in the functioning of your kidneys.
The blood urea nitrogen bun test checks for other waste products in the blood such as urea nitrogen.
In the united states only the nitrogen component of urea is measured the blood urea nitrogen i e bun which is roughly one half of blood urea. Creatinine levels in the blood can vary depending on age race and body size. The kidneys help keep the blood creatinine stable and these levels go up if there is some problem in the functioning of your kidneys. A creatinine level of greater than 1 2 for women and greater than 1 4 for men may be an early sign that the kidneys are not working properly.