Automated urinalysis method for detecting blood in urine
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United States of America Patent
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-
Mar 31, 1998
Grant Date -
N/A
app pub date -
Jan 23, 1997
filing date -
May 28, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Detecting red blood cells in a patient's urine by placing an aliquot of the urine in an automated analyzer sampling cup. The urine is transferred to a cuvette mounted within the automated analyzer and one or more reagent compositions in an aqueous medium is injected into the cuvette. The reagent contains a buffer to adjust pH, chemicals to remove substances in the urine that interfere with colorimetric photometry, a compound to lyse the red blood cells in the urine, a substrate to react with the hemoglobin, a color indicator and a surfactant to improve fluid mechanics. The sample is read against a standard using a pre-programmed monochromatically specified wavelength to determine the presence or absence of blood cells in the patient's urine.
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