UREA NITROGEN, RANDOM URINE: Report Availability: Daily: Code: U102: Test Components: Category: Disorders of Kidney : Specimen: 10 mL (5 mL min.) Normal values are between 2.5 and 8.2 mmol/L. The results between the blood urea nitrogen (BUN) and urine creatinine will determine the ratio. Normal value ranges may vary slightly among different laboratories. Healthy kidneys take urea nitrogen out of the blood so it can be excreted in the urine. In individuals with normal kidney and liver functions, urea is excreted via urine. How the Test is Performed. It is normally removed from your blood by your kidneys, but when kidney function slows down, the BUN level rises. Note that target ranges may vary between laboratories. Overproduction in the liver or under-excretion by the kidneys will cause BUN levels to rise above normal. A blood urea nitrogen test is ordered as a diagnostic tool examining liver and/or kidney function. In Europe, the whole urea molecule is measured. If your kidneys are not working well, the urea nitrogen will stay in the blood. Your kidneys remove urea nitrogen from your blood. Test Details . Reference Interval Normal range/expected value(s) for a specific disease state. Wt.=60) that is freely filtered by glomeruli and the majority is excreted into the urine, although variable amounts are reabsorbed along the nephron. Urea Nitrogen (BUN) - Urea is the principle waste product of protein catabolism. Ask your doctor to explain your results. for updated normal ranges. Arch Intern Med 1998; 158, 22: 2509-11. May also include abnormal ranges. Jurado R et tal. The result in men is illustrated in Figure 1. Urea is excreted by the kidneys. The normal range for BUN is between 5 – 20 mg/dL . Infants have lower levels than other people do, and the range in children varies. LOINC® Codes, Performing Laboratory . Do not touch the inside of the cup. Normal Results. Urine urea nitrogen; Purpose: assess nitrogen balance. Normally, nitrogen in the blood binds to other wastes that are filtered by the kidneys and leave your body in your urine. Urine: This is a fluid excreted by the kidneys. The test can help determine how well the kidneys are functioning, and if your intake of protein is too high or low. Value of a simple biochemical ratio in distinguishing upper and lower sites of gastrointestinal haemorrhage. The 24 hour sample of urine creatinine will usually range between 500 and 2000 mg/day. The decreased serum urea nitrogen-creatinine ratio. Normal blood contains 7-20 mg/dl of urea. 3. It is important to note that the results can … Blood Urea Nitrogen (BUN): Urea nitrogen is a normal waste product in your blood that comes from the breakdown of protein from the foods you eat and from your body metabolism. It is the major end product of protein metabolism in humans and other mammals. Terms used Na: this is sodium, one of the salts in your blood which your kidneys helps to control. 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