Medical diagnostic device with enough-sample indicator
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United States of America Patent
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Jul 17, 2001
Grant Date -
N/A
app pub date -
Jul 16, 1999
filing date -
Jul 20, 1998
priority date (Note) -
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Abstract
A fluidic medical diagnostic device permits measurement of analyte concentration or a property of a biological fluid, particularly the coagulation time of blood. The device has at one end a sample port for introducing a sample and at the other end a bladder for drawing the sample to a measurement area. A first channel carries the sample from the sample port to the measurement area, and a stop junction, between the measurement area and bladder, halts the sample flow. A second channel, which runs from the first channel to an edge of the device, determines whether the sample volume is sufficient to permit an accurate measurement. The desired measurement can be made by placing the device into a meter, which measures a physical property of the sample, typically optical transmittance, after it has interacted with one or more reagents on the device.
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