Chemistry: analytical and immunological testing – Hemoglobin – myoglobin – or occult blood
Reexamination Certificate
2006-08-09
2009-06-02
Gupta, Anish (Department: 1654)
Chemistry: analytical and immunological testing
Hemoglobin, myoglobin, or occult blood
Reexamination Certificate
active
07541190
ABSTRACT:
A method of measuring cellular hemoglobin of a blood sample includes mixing a blood sample with a permeation reagent, and incubating the sample mixture to permeate cellular membrane of red blood cells and to cause hemoglobin aggregation within the cells; adding a neutralization reagent to inhibit further reactions of the permeation reagent; performing a cell-by-cell measurement of side scatter signals of the red blood cells in the sample mixture on a flow cytometer; and obtaining cellular hemoglobin (Hgbcell) of each red blood cell using the obtained side scatter signals. The method further includes measuring cellular hemoglobin of reticulocytes (Hgbretic) by differentiating reticulocytes using a simultaneous fluorescence measurement. The method also includes measuring cellular percentage of a hemoglobin variant in mature red blood cells or reticulocytes by adding a fluorescent antibody in the neutralization reagent and detecting fluorescence signals of antibody bound hemoglobin variant.
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Malergue Fabrice
Van Agthoven Andreas
Alter Mitchell E.
Beckman Coulter Inc.
Cuspa Technology Law Associates
Gupta Anish
Niebauer Ronald T
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