#UREA NITROGEN BUN NORMAL RANGE PROFESSIONAL#

Kidney disease or blockage of the flow of urine from your kidney causes both BUN and creatinine levels to go up.ĭo not eat a lot of meat or other protein in the 24 hours before having a BUN test.Ī health professional uses a needle to take a blood sample, usually from the arm. This causes a high BUN-to-creatinine ratio. Dehydration generally causes BUN levels to rise more than creatinine levels. See if treatment of your kidney disease is working.Ĭheck for severe dehydration. See if your kidney disease is getting worse. See if your kidneys are working normally. A BUN-to-creatinine ratio can help your doctor check for problems, such as dehydration, that may cause abnormal BUN and creatinine levels. Blood urea nitrogen (BUN) and creatinine tests can be used together to find the BUN-to-creatinine ratio (BUN:creatinine).

The level of creatinine in your blood also tells how well your kidneys are working-a high creatinine level may mean your kidneys are not working properly. A low BUN level can occur normally in the second or third trimester of pregnancy.īlood urea nitrogen to creatinine ratio (BUN:creatinine)Ī BUN test may be done with a blood creatinine test. Liver disease or damage can lower your BUN level. Heart failure, dehydration, or a diet high in protein can also make your BUN level higher. If your kidneys are not able to remove urea from the blood normally, your BUN level rises. Urea is made in the liver and passed out of your body in the urine.Ī BUN test is done to see how well your kidneys are working. Urea is made when protein is broken down in your body. Health Library Skip Navigation Top of the page Blood Urea Nitrogen (BUN) Test Test OverviewĪ blood urea nitrogen (BUN) test measures the amount of nitrogen in your blood that comes from the waste product urea.

Urea nitrogen bun normal range