Opposable-element assay device employing unidirectional flow
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United States of America Patent
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Mar 9, 1999
Grant Date -
N/A
app pub date -
Jan 29, 1997
filing date -
Jan 29, 1997
priority date (Note) -
Expired
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Abstract
An assay device for the performance of assays for analytes, particularly those of biological interest, provides for improved efficiency and sensitivity by reducing background. The assay device performs an immunochromatographic assay and also provides a wash to remove unbound labeled specific binding partner and thereby reduce the background. Assay devices according to the present invention can use either a directly visible label such as a metal sol label or an enzyme label. One embodiment of assay devices according to the present invention is particularly suitable for assay of analytes in whole blood samples. The present invention also encompasses test kits and methods of use of the assay devices.
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