Microdroplet dispensing for a medical diagnostic device
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United States of America Patent
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Dec 14, 2004
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app pub date -
Dec 3, 1999
filing date -
Jun 15, 1999
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Abstract
A medical diagnostic device has a non-absorbent substrate that has a hydrophilic target area on which a reagent is deposited by non-impact printing of microdroplets. During deposition, the device is moved relative to the stream of microdroplets to form a substantially uniform reagent layer on the substrate. The device is particularly well adapted for measuring blood coagulation times. In a preferred embodiment, coagulation times are determined by monitoring the optical transmission of light through the target area as an applied blood sample interacts with the reagent.
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