Chemistry: analytical and immunological testing – Hemoglobin – myoglobin – or occult blood
Reexamination Certificate
2005-01-18
2005-01-18
Gakh, Yelena G. (Department: 1743)
Chemistry: analytical and immunological testing
Hemoglobin, myoglobin, or occult blood
C436S063000, C436S064000, C436S067000, C436S164000
Reexamination Certificate
active
06844195
ABSTRACT:
A method for determining if blood in a stool sample originated from the upper or lower gastrointestinal tract. This includes a method for purifying and concentrating hemoglobin and its products from a stool sample to allow a simple and sensitive spectrophotometric analysis. A rapid, noninvasive determination of whether the blood originated from an upper gastrointestinal or lower gastrointestinal site is made on the basis of changes in the absorption spectra of hemoglobin that occur when hemoglobin is exposed to a highly acidic environment.
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Gakh Yelena G.
Western Research Company
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