Method and apparatus for reducing purge volume in a blood chemistry monitoring system
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United States of America Patent
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Sep 7, 1999
Grant Date -
N/A
app pub date -
Jan 9, 1997
filing date -
Jan 9, 1997
priority date (Note) -
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Abstract
A method and apparatus for reducing the volume of fluid required to purge a patient's blood from a blood sampling site after the blood has been sampled for measurement. A coil is formed in the fluid flow line between the source of fluid and the blood sampling site by looping the fluid flow line around on itself in order to generate turbulence in the fluid flow to help purge the patient's blood from the blood sampling site after sampling. This turbulence-inducing coil is conveniently formed in a fluid flow line extending from the upstream end of a blood chemistry sensor module which is adapted to be installed in the fluid flow line of a standard IV infusion set as part of a combined infusion fluid delivery and blood chemistry monitoring system.
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