![]() ![]() For the adult female, with her generally lower muscle mass, the normal range is 0.5 to 1.1 mg/dl, or 44 to 97 μmol/L by the enzymatic method.Ĭopyright © 1990, Butterworth Publishers, a division of Reed Publishing. Normal ranges vary depending on the reference range used by the lab, but anywhere between 10-20 mg/dL is considered normal. For the adult male, the normal range is 0.6 to 1.2 mg/dl, or 53 to 106 μmol/L by the kinetic or enzymatic method, and 0.8 to 1.5 mg/dl, or 70 to 133 μmol/L by the older manual Jaffé reaction. Unless this level is greater than 60 mg/dL, it may not help your healthcare. The normal serum creatinine ( sCr) varies with the subject's body muscle mass and with the technique used to measure it. The normal BUN level is between about 7 and 20 milligrams per deciliter (mg/dL). Urea is a waste product that is formed in the liver and excreted by the kidneys. In contrast, the rugged rancher who eats in excess of 125 g protein each day may have a normal BUN of 20 mg/dl. Urea VS BUN: Urea and BUN (blood urea nitrogen) are related but different markers of kidney function. Her higher glomerular filtration rate (GFR), expanded extracellular fluid volume, and anabolism in the developing fetus contribute to her relatively low BUN of 5 to 7 mg/dl. A BUN of 15 mg/dl would represent significantly impaired function for a woman in the thirtieth week of gestation. Abnormal BUN levels may indicate problems with liver or kidney. ![]() The range is wide because of normal variations due to protein intake, endogenous protein catabolism, state of hydration, hepatic urea synthesis, and renal urea excretion. A BUN test measures the level of urea nitrogen in the blood using a standard blood sample. The normal range of urea nitrogen in blood or serum is 5 to 20 mg/dl, or 1.8 to 7.1 mmol urea per liter. The BUN, then, is roughly one-half (28/60 or 0.446) of the blood urea. In Europe, the whole urea molecule is assayed, whereas in the United States only the nitrogen component of urea (the blood or serum urea nitrogen, i.e., BUN or SUN) is measured. ![]() BUN levels reflect the balance between urea production and kidney filtration. In children aged 1 to 17, the typical range is 7 to 20 mg/dL. For adult men, the normal BUN range is 8 to 24 mg/dL, while for adult women, its 6 to 21 mg/dL. Both are relatively small molecules (60 and 113 daltons, respectively) that distribute throughout total body water. Interpreting Blood Urea Nitrogen (BUN) levels involves understanding the reference ranges. The BUN test (short for Blood Urea Nitrogen) is a method used to measure the amount of nitrogen present in urea (urea nitrogen). Creatinine is the product of muscle creatine catabolism. Urea is the primary metabolite derived from dietary protein and tissue protein turnover. But normal ranges may vary, depending on the reference range used by the lab and your age. In general, around 6 to 24 mg/dL (2.1 to 8.5 mmol/L ) is considered normal. Urea and creatinine are nitrogenous end products of metabolism. Results of the BUN test are measured in milligrams per deciliter (mg/dL) in the United States and in millimoles per liter (mmol/L) internationally. ![]()
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