Kidney Function Test Urea Nitrogen. Blood urea nitrogen or bun test checks for wastes in blood. Discolored urine bloody dark or foamy joint pain.
Urea nitrogen levels tend to increase with age. The blood urea nitrogen test which is also called a bun or serum bun test measures how much of the waste product you have in your blood. Discolored urine bloody dark or foamy joint pain.
Generally a high blood urea nitrogen level means your kidneys aren t working well.
Tests to measure kidney function mayo clinic. Bun kidney function test normal range varies between 7 and 20mg dl. The blood urea nitrogen test which is also called a bun or serum bun test measures how much of the waste product you have in your blood. The urine urea nitrogen test determines how much urea is in the urine to assess the amount of protein breakdown.