Normetanephrine urine by DRG International Inc.

Manufacturer DRG International Inc.  |   Model: EIA-4321  |  Available Worldwide
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Normetanephrine urine

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During the sample preparation Normetanephrine (Normetadrenaline) is quantitatively acylated.The subsequent competitive ELISA uses the microtiter plate format. The antigen is bound to the solid phase of the microtiter plate. The acylated standards, controls and samples and the solid phase bound analyte compete for a fixed number of antibody binding sites. After the system is in equilibrium, free antigen and free antigen-antibody complexes are removed by washing. The antibody bound to the solid phase is detected by an anti-rabbit IgG-peroxidase conjugate using TMB as a substrate. The reaction is monitored at 450 nm. Quantification of unknown samples is achieved by comparing their absorbance with a reference curve prepared with known standard concentrations. Metanephrine and Normetanephrine are the metabolites of the catecholamines Epinephrine and Norepinephrine, respectively. They are metabolized to Vanillylmandelic acid or excreted with the urine. Patients with pheochromocytoma or other tumors derived from neuroendocrine cells show elevated urinary levels of total Metanephrines. As catecholamine secretion from neuroendocrine cells might show high variations, urine samples collected over a period of 24 hours are used to average these fluctuations. Therapeutic consequences should never be based on laboratory results alone even if all test results are in agreement with the items as under point “Procedural cautions, guidelines and warnings”. Anylaboratory result is only a part of the total clinical picture of the patient. Only in cases where the laboratory results are in an acceptable agreement with the overall clinical picture of the patient it can be used for therapeutic consequences. The test result itself should never be the sole determinant for deriving any therapeutic consequences.

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Normetanephrine urine by DRG International Inc. product image

Normetanephrine urine

Manufacturer DRG International Inc.  |  Available Worldwide

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