Nephrology Book

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Blood Urea Nitrogen

Aka: Blood Urea Nitrogen, BUN
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  1. Pathophysiology
    1. Increases by 10-20 mg/dl/day if Renal Function absent
    2. Serum Creatinine is a better measure of Renal Function
      1. BUN is Protein dependent
        1. High protein diet
        2. Catabolism
      2. BUN is reabsorbed at renal tubules
        1. Prerenal Failure
          1. Dehydration
          2. Congestive Heart Failure
        2. Postrenal Failure
          1. Obstructive Uropathy
  2. Increased BUN
    1. Medications
      1. Aminoglycosides
      2. Diuretics
      3. Lithium
      4. Corticosteroids
    2. Dehydration
    3. Gastrointestinal Bleeding
    4. Decreased Renal blood flow
      1. Shock
      2. Congestive Heart Failure
      3. Myocardial Infarction
    5. Renal disease
      1. Glomerulonephritis
      2. Pyelonephritis
      3. Diabetic Nephropathy
    6. Urinary Tract Obstruction
  3. Decreased BUN
    1. Liver disease
    2. Poor nutrition
    3. Overhydration
    4. Third trimester of pregnancy

Blood urea nitrogen measurement (C0005845)

Definition (NCI) A quantitative measurement of the amount of urea nitrogen present in a serum sample.
Definition (NCI) A measurement of the urea nitrogen in a blood specimen.
Definition (MSH) The urea concentration of the blood stated in terms of nitrogen content. Serum (plasma) urea nitrogen is approximately 12% higher than blood urea nitrogen concentration because of the greater protein content of red blood cells. Increases in blood or serum urea nitrogen are referred to as azotemia and may have prerenal, renal, or postrenal causes. (From Saunders Dictionary & Encyclopedia of Laboratory Medicine and Technology, 1984)
Concepts Laboratory Procedure (T059)
MSH D001806
SnomedCT 166722003, 144012007, 105011006, 250623007, 24509005, 144004004, 166710001
CPT 84520
English Blood Urea Nitrogen, BUN, Nitrogen, Blood Urea, Urea Nitrogen, Blood, Blood urea nitrogen measurement, blood urea nitrogen, Blood urea nitrogen, Urea nitrogen; quantitative, UREA NITROGEN; QUANTITATIVE, Urea - blood, Blood Urea Nitrogen Measurement, Blood urea (procedure), urea blood, blood urea, blood urea nitrogen (BUN) level test, bun measurement, BUN measurement, Blood urea, Blood urea measurement (procedure), Blood urea measurement, Blood urea nitrogen measurement (procedure), ASSAY OF UREA NITROGEN, Assay of urea nitrogen, UREA N QUAN
Italian Urea nel sangue, Azoto ureico, Azoto ureico ematico, BUN, Azotemia
Dutch bloed ureum stikstof, bloed ureum, BUN, Blood-urea nitrogen
French Azote uréique du sang, BUN, Azote uréique sérique, Azote uréique sanguin, Urée sanguine
German BUN, Harnstoff-Stickstoff im Blut, Blutharnstoff, Reststickstoff im Serum
Portuguese Azoto ureico no sangue, Ureia no sangue, NUS, BUN, Nitrogênio da Uréia Sanguínea, Uréia Plasmática
Spanish Nitrógeno ureico en sangre, Urea - blood, Blood urea, Nitrogeno ureico; cuantitativo, determinación de uremia, medición de BUN, medición de NUS, medición de nitrógeno ureico en sangre (procedimiento), medición de nitrógeno ureico en sangre, medición de uremia (procedimiento), medición de uremia, Urea en sangre, NUS, BUN, Nitrogeno de la Urea Sanguinea, Nitrógeno de la Urea Sanguínea
Japanese ＢＵＮ, 血中尿素, ｹｯﾁｭｳﾆｮｳｿﾁｯｿ, ｹｯﾁｭｳﾆｮｳｿ, BUN, 血清尿素窒素, 血中尿素窒素, 血液尿素窒素
Swedish Blodurea
Czech krev - dusík močoviny, Močovina v krvi, Dusík močoviny v krvi
Finnish Ureatyppi
Russian AZOT MOCHEVINY KROVI, MOCHEVINY KROVI AZOT, KROVI MOCHEVINY AZOT, АЗОТ МОЧЕВИНЫ КРОВИ, КРОВИ МОЧЕВИНЫ АЗОТ, МОЧЕВИНЫ КРОВИ АЗОТ
Polish Azot mocznika krwi
Hungarian Karbamid-nitrogén vérszint, BUN, Karbamid vérszint
Sources
Derived from the NIH UMLS (Unified Medical Language System)


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