Medically reviewed by Carissa Stephens, R.N., CCRN, CPN — composed by Rachel Nall, MSN, CRNA — update on February 28, 2018

Your human body creates ammonia once it breaks down protein from foods. Ammonia contains nitrogen, i m sorry mixes through other aspects in your body, including carbon, hydrogen, and also oxygen, to kind urea. Urea is a garbage product the is excreted by the kidneys as soon as you urinate.

You are watching: Increase of nitrogenous substances, especially urea, in urine

The pee urea nitrogen test determines how much urea is in the pee to assess the amount of protein breakdown. The check can help determine just how well the kidneys are functioning and also whether your intake the protein is too high or low. Additionally, that can aid diagnose even if it is you have a problem with protein cradle or absorb from the gut.

purpose of a to pee urea nitrogen test

Your physician will commonly recommend a urea check to identify protein levels in the body. The test have the right to determine how much protein she eating, and also if that an enough amount. In addition, your urea nitrogen levels might rise if you’re going through heart fail or dehydration.

A typical test because that urea nitrogen is the blood urea nitrogen test, far better known together BUN. This article refers come the to pee urea nitrogen test, which is performed using a pee sample.

A urea nitrogen test can also:

assess how well the kidneys space functioningdetermine if you have kidney diseasemonitor your kidney diseasehelp diagnose a variety of diseases and also disorders that may influence how her kidneys function
to pee urea nitrogen check process

The to pee urea nitrogen check involves analyzing urine samples the you collect during a stated 24-hour period.

Follow her doctor’s orders about how to collect the sample. Generally, friend will maintain normal eating and drinking actions during the collection phase.


Wash your hands closely before and also after collecting each sample. Also, make certain that you lid the containers tightly. Label and also return the samples come the doctor as instructed. Samples must be refrigerated during the 24-hour period.

On the very first day that collection, you won’t collection a sample when you an initial urinate that morning. Keep in mind the time, and also then collection all urine for the staying 24 hours.

Once collected, the urine is sent out to a laboratory for analysis.

knowledge your check results

A typical urea level in the to pee is 12 come 20 grams over 24 hours. Separation, personal, instance labs may have actually reference arrays that vary slightly and can be different based on sex or age.

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Low level of urea in the urine may suggest:

High levels of urea in the urine may suggest:

excessive protein breakdown in the body

Your doctor will call you to walk over your results once your urine samples have actually been analyzed. They might need come order more tests or physics exams prior to they’re able to provide you a diagnosis.

critical medically the review on February 27, 2018


Medically the review by Carissa Stephens, R.N., CCRN, CPN — written by Rachel Nall, MSN, CRNA — update on February 28, 2018

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