Collection tubes apparatus, systems and methods
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United States of America Patent
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Jul 5, 2011
Grant Date -
May 21, 2009
app pub date -
Nov 14, 2008
filing date -
Aug 10, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
Methods of producing collection tubes are presented. The methods include providing a separator substance that can rapidly polymerize in a short time to a desired hardness and disposing the separator substance within the lumen of the tube. The separator substance is formulated to have a density between an average density of a serum fraction of whole blood and a cell-containing fraction of whole blood, and to be flowable with whole blood. Upon centrifugation of a tube having blood, the separator substance forms a barrier between the whole blood fractions. The tube and barrier maintain stability of one or more analyte levels, including potassium and glucose, within 10% of their initial values before centrifugation for at least four days.
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