| Implications for the use of acid preservatives in 24-hour urine for measurements of high demand biochemical analytes in clinical laboratories. | |
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MedLine Citation:
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PMID: 21910978 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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BACKGROUND: Evaluate the level of interference of biochemists dosages in the 24-hour urine using or not the 6mol/l HCl acid in different concentrations and conditions and its implications in the most demanded analytes in clinical laboratory. METHODS: Twenty-two volunteers collected three 24-hour urine in 3 conditions: with 5ml/l and 20ml/l of 6mol/l HCl in the container, and without acid preservative. The samples collected without preservative were separated in aliquots and added 5ml/l of 6mol/l HCl after 24h. Analytes, uric acid creatinine, urea, chlorides, glucose, magnesium, sodium, potassium, microalbumin, proteins, amylase, aldosterone, calcium, cortisol, phosphorus, citric acid, oxalate, and metanephrines, were determined. RESULTS: Uric acid, glucose, microalbumin, protein, amylase and aldosterone showed that %CV ranging from 16 to 57% in the presence of acid preservative. Analytes that need acid preservative cortisol, citric acid and oxalate showed %CV ranging from 6 to 27% with r=0.66, r=0.77, r=0.70 respectively provided 5ml/l after delivery and r=0.31, r=0.70 and r=0.48 without preservative acid when compared with the gold standard (with 20ml/l of 6mol/l HCl). CONCLUSIONS: Glucose, microalbumin, protein, amylase and aldosterone urinary did not show good performance in the presence of acid preservative. Analytes that need acid preservative showed variation acceptable in condition 5ml/l of 6mol/l HCl added after 24h. |
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Authors:
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Marcia C Feres; Rolando Bini; Maria Cristina De Martino; Simone P Biagini; Altay Lino de Sousa; Paulo G Campana; Sergio Tufik |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-9-2 |
Journal Detail:
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Title: Clinica chimica acta; international journal of clinical chemistry Volume: - ISSN: 1873-3492 ISO Abbreviation: - Publication Date: 2011 Sep |
Date Detail:
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Created Date: 2011-9-13 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 1302422 Medline TA: Clin Chim Acta Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011. Published by Elsevier B.V. |
Affiliation:
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Psychobiology Department of the Universidade Federal de São Paulo, UNIFESP, São Paulo, Brazil. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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