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

Your body creates ammonia when it breaks under protein native foods. Ammonia consists of nitrogen, i beg your pardon mixes with other facets in your body, consisting of carbon, hydrogen, and also oxygen, to kind urea. Urea is a rubbish product the is excreted through the kidneys as soon as you urinate.

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

The to pee urea nitrogen test determines how much urea is in the urine to evaluate the quantity of protein breakdown. The test can aid determine just how well the kidneys room functioning and whether her intake of protein is as well high or low. Additionally, it can assist diagnose even if it is you have actually a difficulty with protein cradle or absorption from the gut.

function of a to pee urea nitrogen test

Your physician will typically recommend a urea check to identify protein level in the body. The test can determine how much protein you eating, and if the an sufficient amount. In addition, her urea nitrogen levels might rise if you’re going v heart failure or dehydration.

A common test because that urea nitrogen is the blood urea nitrogen test, far better known together BUN. This post refers to the urine urea nitrogen test, i m sorry is performed using a to pee sample.

A urea nitrogen test can also:

assess how well the kidneys room functioningdetermine if you have actually kidney diseasemonitor her kidney diseasehelp diagnose a variety of diseases and disorders the may affect how her kidneys function
to pee urea nitrogen check process

The pee urea nitrogen check involves assessing urine samples the you collect throughout a stated 24-hour period.

Follow your doctor’s orders around how to collection the sample. Generally, you will maintain normal eating and also drinking habits during the collection phase.


Wash her hands carefully before and after collecting every sample. Also, make sure that you cap the containers tightly. Label and also return the samples to the medical professional as instructed. Samples should be refrigerated throughout the 24-hour period.

On the first day the collection, you won’t collection a sample once you first urinate that morning. Note the time, and then collect all urine because that the remaining 24 hours.

Once collected, the pee is sent out to a activities for analysis.

expertise your check results

A normal urea level in the pee is 12 to 20 grams over 24 hours. Separation, personal, instance labs may have reference ranges that differ slightly and also can be different based upon sex or age.

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Low levels of urea in the urine might suggest:

High levels of urea in the urine may suggest:

excessive protein failure in the body

Your doctor will call you to go over her results as soon as your urine samples have been analyzed. They may need come order an ext tests or physical exams prior to they’re maybe to provide you a diagnosis.

critical medically the evaluation 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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