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  2. Blood urea nitrogen - Wikipedia

    en.wikipedia.org/wiki/Blood_urea_nitrogen

    Blood urea nitrogen (BUN) is a medical test that measures the amount of urea nitrogen found in blood. The liver produces urea in the urea cycle as a waste product of the digestion of protein . Normal human adult blood should contain 7 to 18 mg/dL (0.388 to 1 mmol/L) of urea nitrogen. [ 1 ]

  3. Urea-to-creatinine ratio - Wikipedia

    en.wikipedia.org/wiki/Urea-to-creatinine_ratio

    In medicine, the urea-to-creatinine ratio (UCR [1]), known in the United States as BUN-to-creatinine ratio, is the ratio of the blood levels of urea (mmol/L) and creatinine (Cr) (μmol/L). BUN only reflects the nitrogen content of urea (MW 28) and urea measurement reflects the whole of the molecule (MW 60), urea is just over twice BUN (60/28 ...

  4. List of human blood components - Wikipedia

    en.wikipedia.org/wiki/List_of_human_blood_components

    Blood Urea Nitrogen (BUN) 8-23 × 10 −5: Bradykinin: 7 × 10 −11: Bromide: 7-10 × 10 −9: Cadmium: normal 1-5 × 10 −9: toxic 0.1-3 × 10 −6: Calciferol (vitamin D 2) Maintain calcium and phosphorus levels 1.7-4.1 × 10 −8: Calcitonin (CT) Hormone <1.0 × 10 −10: Calcium: Bones, Ca 2+ ionized 4.48-4.92 × 10 −5: 4.25-5.25 × 10 ...

  5. Azotemia - Wikipedia

    en.wikipedia.org/wiki/Azotemia

    Measurements of urea and creatinine (Cr) in the blood are used to assess renal function. For historical reasons, the lab test measuring urea is known as "blood urea nitrogen" (BUN) in the US. The BUN:Cr ratio is a useful measure in determining the type of azotemia and will be discussed in each section below. A normal BUN:Cr is equal to 15. [3]

  6. Reference ranges for blood tests - Wikipedia

    en.wikipedia.org/wiki/Reference_ranges_for_blood...

    BUN – blood urea nitrogen: 7 [14] 18, [14] 21 [15] mg/dL * Uric acid [15] 0.18 [14] 0.48 [14] mmol/L: Female: 2.0 [23] 7.0 [23] mg/dL: Male: 2.1 [23] 8.5 [23] mg/dL ...

  7. Basic metabolic panel - Wikipedia

    en.wikipedia.org/wiki/Basic_metabolic_panel

    Outside the United States, blood tests made up of the majority of the same biochemical tests are called urea and electrolytes (U&E or "U and Es"), or urea, electrolytes, creatinine (UEC or EUC or CUE), and are often referred to as 'kidney function tests' as they also include a calculated estimated glomerular filtration rate. The BMP provides ...

  8. Nephritic syndrome - Wikipedia

    en.wikipedia.org/wiki/Nephritic_syndrome

    Blood urea nitrogen (BUN) - Also measured using a BMP or CMP, blood urea nitrogen is an indicator of how much nitrogen is in the blood at the time of the phlebotomy. The kidney is responsible for excreting nitrogenous substances in the urine, so an elevated BUN usually indicates that the kidney is not functioning appropriately. [32]

  9. Upper gastrointestinal bleeding - Wikipedia

    en.wikipedia.org/wiki/Upper_gastrointestinal...

    The strongest predictors of an upper gastrointestinal bleed are black stool, age <50 years, and blood urea nitrogen/creatinine ratio 30 or more. [8] [9] The diagnosis of upper gastrointestinal bleeding is assumed when hematemesis (vomiting of blood) is observed. [citation needed]