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  2. Vanillylmandelic acid - Wikipedia

    en.wikipedia.org/wiki/Vanillylmandelic_acid

    VMA is found in the urine, along with other catecholamine metabolites, including homovanillic acid (HVA), metanephrine, and normetanephrine.In timed urine tests the quantity excreted (usually per 24 hours) is assessed along with creatinine clearance, and the quantity of cortisols, catecholamines, and metanephrines excreted is also measured.

  3. Normetanephrine - Wikipedia

    en.wikipedia.org/wiki/Normetanephrine

    It is excreted in the urine and found in certain tissues. It is a marker for catecholamine-secreting tumors such as pheochromocytoma. Norepinephrine degradation. Normetanephrine is shown at top left. Enzymes are shown in boxes. [2]

  4. 5-Hydroxyindoleacetic acid - Wikipedia

    en.wikipedia.org/wiki/5-Hydroxyindoleacetic_acid

    5-HIAA is tested by 24-hour urine samples [1] combined with an acidic additive to maintain pH below 3. Certain foods like pineapple, kiwi, banana, walnuts and drugs such as acetaminophen, nicotine or caffeine are known to interfere with the measurement.

  5. Catecholamine - Wikipedia

    en.wikipedia.org/wiki/Catecholamine

    [17] [18] Each of the tests measure the amount of adrenaline and noradrenaline metabolites, respectively called metanephrine and normetanephrine. Blood tests are also done to analyze the amount of catecholamines present in the body. Catecholamine tests are done to identify rare tumors at the adrenal gland or in the nervous system.

  6. Pheochromocytoma - Wikipedia

    en.wikipedia.org/wiki/Pheochromocytoma

    Elevated plasma free metanephrines is considered the gold standard diagnosis for pheochromocytoma. [63] Over 10 studies have confirmed that the sensitivity and specificity of this test is 97% and 93% respectively; however, there is still concern for false positive results in the correct clinical scenario. [6]

  7. Metanephrine - Wikipedia

    en.wikipedia.org/wiki/Metanephrine

    Metanephrine, also known as metadrenaline, is a metabolite of epinephrine (also known as adrenaline) created by action of catechol-O-methyl transferase on epinephrine. An article in the Journal of the American Medical Association, 2002, indicated that the measurement of plasma free levels of the metanephrines group of molecules (including metanephrine and normetanephrine) is the best tool in ...

  8. Adrenergic storm - Wikipedia

    en.wikipedia.org/wiki/Adrenergic_storm

    An adrenergic storm is a sudden and dramatic increase in serum levels of the catecholamines adrenaline and noradrenaline (also known as epinephrine and norepinephrine respectively), with a less significant increase in dopamine transmission.

  9. Urinalysis - Wikipedia

    en.wikipedia.org/wiki/Urinalysis

    It is not possible for the kidneys to produce urine with a specific gravity greater than 1.040 [40] but such readings can occur in urine that contains high-molecular weight substances, such as contrast dyes used in radiographic imaging. [38] Specific gravity is commonly measured with urine test strips, but refractometers may also be used. [41]

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