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Reference ranges for urine tests are described below: Measurement Lower limit Upper limit Unit Urinary specific gravity: 1.003 [1] [2] 1.030 [1] [2] g/mL Urobilinogen:
Urobilin or urochrome is the chemical primarily responsible for the yellow color of urine. It is a linear tetrapyrrole compound that, along with the related colorless compound urobilinogen , are degradation products of the cyclic tetrapyrrole heme .
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.
A urologist explains what to watch out for in your urine’s color, clarity and odor. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290 ...
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A standard urine test strip may comprise up to 10 different chemical pads or reagents which react (change color) when immersed in, and then removed from, a urine sample.The test can often be read in as little as 60 to 120 seconds after dipping, although certain tests require longer.
Medical experts have long connected urine colour with certain medical conditions. A medieval chart showing the medical implications of different urine color. Urine varies in appearance, depending principally upon a body's level of hydration, interactions with drugs, compounds and pigments or dyes found in food, or diseases. [8]
The signs and symptoms of abnormal urine color are shown as follows: Unexplained urine color other than straw-yellow has continued for a long time. [1] Once observe blood in urine. [1] Clear, dark-brown urine. [1] Risk factors of clinical abnormal urine color include elderly age, strenuous exercise, and family history of related diagnosis. [2]