Differential pressure sensor with sloped strut edges for respiratory monitoring
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United States of America Patent
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-
Oct 12, 2004
Grant Date -
Jan 29, 2004
app pub date -
Jul 24, 2002
filing date -
Jul 24, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A differential-pressure flow sensor for airflow measurement in the presence of water condensation, for use with mechanical ventilators. The pressure-sensing ports at either end of the interfering body are displaced from the inner surface of the surrounding tubing, so as to prevent obstruction of the pressure-sensing ports by free flowing condensed water. The leading edge of the interfering body is angulated so as to deflect airflow towards the pressure-sensing port on the trailing edge of the interfering body, thereby flushing water droplets away from the port. The sides of the interfering body are sloped so as to generate turbulent boundary layer airflow at areas distant from the pressure-sensing ports, thereby encouraging water condensation away from the ports.
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Family
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