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  2. Urobilinogen - Wikipedia

    en.wikipedia.org/wiki/Urobilinogen

    Urobilinogen is a yellow by-product of bilirubin reduction. It is formed in the intestines by the bacterial enzyme bilirubin reductase. [ 1 ] About half of the urobilinogen formed is reabsorbed and taken up via the portal vein to the liver, enters circulation and is excreted by the kidney.

  3. Urine test strip - Wikipedia

    en.wikipedia.org/wiki/Urine_test_strip

    The reactions that take place in the test strip vary according to the manufacturer, but in reality there are two reactions that are most frequently used. Some manufacturers use Ehrlich's reaction (1), in which urobilinogen reacts with p-dimethylaminobenzaldehyde (Ehrlich's reagent) in order to produce colours that vary from light to dark pink ...

  4. Reference ranges for urine tests - Wikipedia

    en.wikipedia.org/wiki/Reference_ranges_for_urine...

    Urobilinogen: 0.2 [2] 1.0 [2] Ehrlich units or mg/dL Free catecholamines, dopamine: 90 [3] 420 [3] μg/d Red blood cells (RBCs) 0 [4] [2] 2 [2] - 3 [4] per High Power Field (HPF) RBC casts: n/a 0 / negative [2] White blood cells (WBCs) 0 [2] 2 [2] pH: 5 [2] 7 [2] (unitless) Protein: 0: trace amounts [2] Glucose: n/a: 0 / negative [2] Ketones: n ...

  5. Urinalysis - Wikipedia

    en.wikipedia.org/wiki/Urinalysis

    In bile duct obstruction, urine bilirubin increases but urobilinogen is normal or decreased, as bilirubin cannot reach the intestines to be converted to urobilinogen. [85] Testing methods are based on the Ehrlich reaction of urobilinogen with para -dimethylaminobenzaldehyde , or interaction with a diazonium compound to produce a colored product.

  6. Ehrlich's reagent - Wikipedia

    en.wikipedia.org/wiki/Ehrlich's_reagent

    Ehrlich's reagent or Ehrlich reagent is a reagent containing p-dimethylaminobenzaldehyde (DMAB) and thus can act as an indicator to presumptively identify indoles and urobilinogen. Several Ehrlich tests use the reagent in a medical test; some are drug tests and others contribute to diagnosis of various diseases or adverse drug reactions.

  7. Urobilin - Wikipedia

    en.wikipedia.org/wiki/Urobilin

    Bilirubin is then excreted as bile, which is further degraded by microbes present in the large intestine to urobilinogen. The enzyme responsible for the degradation is bilirubin reductase, which was identified in 2024. [1] [2] Some of this remains in the large intestine, and its conversion to stercobilin gives feces their brown color. Some is ...

  8. Bilirubinuria - Wikipedia

    en.wikipedia.org/wiki/Bilirubinuria

    The increase of stercobilin (urobilin) in the feces and urine is caused by the enhanced intracellular hemolysis of erythrocytes. Formed an unconjugated bilirubin entering the intestine, gives a large number of stercobilinogen (urobilinogen). Last absorbed into the blood and passes into the urine. [citation needed]

  9. Urine test - Wikipedia

    en.wikipedia.org/wiki/Urine_test

    A urine test is any medical test performed on a urine specimen. The analysis of urine is a valuable diagnostic tool because its composition reflects the functioning of many body systems, particularly the kidneys and urinary system, and specimens are easy to obtain. [1]