8/14/2023 0 Comments Elevated creatinine normal bun![]() Your lab report should show the range that your lab uses for each test. NormalĮach lab has a different range for what's normal. This value is the amount of blood cleared of creatinine per minute, based on your body size. The creatinine clearance value is found from the amounts of creatinine in the urine and blood and from the amount of urine you pass in 24 hours. These tests give information about how well your kidneys are working. Empty your bladder for the last time at or just before the end of the collection period.Īdd this urine to the large container.Keep the collected urine in the refrigerator for the collection time.Don't get toilet paper, pubic hair, stool (feces), menstrual blood, or anything else in the urine sample.Don't touch the inside of either container with your fingers. Then pour the urine into the large container. For the set period of time, collect all your urine.Įach time you urinate during this time period, collect your urine in a small, clean container.When you first get up, you empty your bladder.īut don't save this urine.You will use the container to collect your urine. Your doctor will give you a large container that holds about 4 L (1 gal). You collect your urine for a period of time, such as over 4 or 24 hours. 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.
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