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Test ID: Zinc Level
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Zinc Level
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Useful For
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Investigation of Zinc deficiency.
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Method name and description
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Colorimetric Method.
Zinc present in the sample is chelated by 5-Br-PAPS 2-(5-bromo-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino) -phenol in the reagent. The formation of this complex is measured at a specified wavelength.
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Clinical information
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Zinc is an essential trace metal, which is second only to Iron. It is present in Zinc metalloenzymes e.g. carbonic anhydrase, alkaline phosphatase, R.N.A and D.N.A polymerases, thimidine kinase, carboxypeptidases and alcohol dehydrogenase. Clinical studies have found that zinc, combined with antioxidants, may delay progression of age-related macular degeneration.
Zinc deficiency occurs where insufficient zinc is available for metabolic needs. It is usually nutritional, but can also be associated with malabsorption, acrodermatitis enteropathica, chronic liver disease, chronic renal disease, sickle cell disease, diabetes, malignancy, and other chronic illnesses
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Specimen type / Specimen volume / Specimen container
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Specimen type: Plasma
Plasma: Royal Blue Top Trace Element NH tube
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Collection instructions / Special Precautions / Timing of collection
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Collect blood by standard venipuncture techniques as per specimen requirements. When processing samples in primary tubes (sample collection systems), follow the instructions of the tube manufacturer.
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Storage and transport instructions
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Storage: 4 days at 2 – 8°C
Transport: 2-8°C
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Biological reference intervals and clinical decision values
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0 – 18 years: 11.5 -15.3 umol/L
18 years and above: 9.2 – 18.4 umol/L
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Turnaround time / Days and times test performed / Specimen retention time
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Daily (24/7)
Turn-around time:
Routine: One working day
Specimen retention: 4 days
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