Also, it’s standard for a BUN test to be given when you’re in the hospital for certain conditions. If you have a kidney condition, the test is a way to check what your BUN levels are before you start a medication or treatment. It may be one of several blood tests that you get. Your doctor may order a BUN test as part of a routine checkup. If your levels are off the normal range, this could mean that either your kidneys or your liver may not be working properly. 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. When your kidneys are not healthy, they have trouble removing BUN and leave more of it in your blood. But for the most part, your kidneys get rid of it by flushing it out of your body through urine. When your kidneys are healthy, they remove the BUN, usually leaving a small amount of it in the blood.
Your liver releases the substance into the blood, and it eventually ends up in your kidneys. Your liver breaks down the proteins in your food - and while it does that, it creates blood urea nitrogen, also known as BUN. Urea nitrogen is a normal waste product that your body creates after you eat.
It helps them see how well your kidneys are working. Your doctor may order a blood urea nitrogen test as part of a routine health screening.
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