Ratiometric air-in-line detector
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United States of America Patent
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Aug 15, 1989
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N/A
app pub date -
Sep 23, 1987
filing date -
Sep 23, 1987
priority date (Note) -
Expired
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Abstract
An air-in-line detector for use with an IV administration system comprises a light emitter positioned relative to a plurality of light sensors for receiving an IV tube therebetween. A comparator is connected with the light sensors to determine the relative intensity of light respectively incident on each sensor. Means connected with the comparator generates signals in accordance with the relative intensities to indicate whether an IV tube is present and, if so, whether there is fluid or air in the tube.
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