BUN CR NORMAL RANGE PROFESSIONAL

This ratio can help your doctor check for problems, such as dehydration, that may cause abnormal BUN and creatinine levels.Ī health professional uses a needle to take a blood sample, usually from the arm. The levels of blood creatinine and blood urea nitrogen (BUN) can be used to find the BUN-to-creatinine ratio. Urea is made in the liver and passed out of your body in the urine. Urea is a waste product made when protein is broken down in your body. This test measures the amount of urea in your blood. The test is done on both a blood sample and on a sample of urine collected over 24 hours. This test gives better information than a blood creatinine test on how well your kidneys are working. Creatinine clearanceĪ creatinine clearance test measures how well creatinine is removed from your blood by your kidneys. Men generally have higher creatinine levels than women. The amount of creatinine in the blood depends partly on the amount of muscle tissue you have. A high level may mean that your kidneys aren't working as they should. The blood creatinine level shows how well your kidneys are working. If your kidneys are damaged and can't work as they should, the amount of creatinine in your urine goes down while its level in your blood goes up. Your kidneys take creatinine out of your blood and pass it out of your body in urine.

These tests tell how well your kidneys are working.Īnother substance, creatine (say 'KREE-uh-teen'), is formed when food is changed into energy through a process called metabolism. Creatinine and creatinine clearance tests measure the level of the waste product creatinine (say 'kree-AT-uh-neen') in your blood and urine.

Bun cr normal range