Reflectance measurement of analyte concentration with automatic initiation of timing
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United States of America Patent
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Jul 31, 2001
Issued Date -
N/A
app pub date -
May 28, 1999
filing date -
Aug 13, 1986
priority date (Note) -
Expired
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Abstract
A method for measuring analyte concentration in a body fluid involves taking reflectance readings from a first surface of a porous reagent-containing matrix both before and after a sample of the fluid has been applied to a second surface of the matrix. A sequence of reflectance measurements is initiated upon a predetermined drop in reflectance, which indicates that sample has reached the first surface. The analyte concentration is calculated from the sequence of reflectance measurements.
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