Kidney Function Levels Chart Bun. Adults up to 60 years of age. Your kidneys remove urea nitrogen from your blood.
Gfr of chronic kidney disease function. Your protein intake can also shoot up or lower your bun. Stage 3 b moderate to severe.
These tests used together give an indication of overall kidney function but the best way to know if your kidneys are working properly is to measure the glomerular filtration rate gfr.
It is normally removed from your blood by your kidneys but when kidney function slows down the bun level rises. Gfr of chronic kidney disease function. And 97 to 137 ml min. Urea nitrogen occurs as proteins from food break down and elevated levels may be a sign that.