Respiratory flow sensor
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United States of America Patent
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-
Jun 9, 1998
Grant Date -
N/A
app pub date -
Jan 31, 1997
filing date -
May 3, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A respiratory flow sensor to be connected between a breathing tube and an endotracheal catheter, which has a flow channel, an orifice, which is formed by a foil recessed in the flow tube, in which an orifice flap is formed by an incision, and has connections to the flow channel on both sides of the orifice to pick up the pressure difference generated over the orifice. The respiratory flow sensor is reusable and makes possible accurate measurement even at low flow rates and low pneumatic resistance. The foil is a metal foil, which is interrupted by a central incision in the area carrying the orifice flap to form two hinge elements which are narrow compared with the width of the orifice flap. A first flow rectifier is arranged in the flow channel between the orifice flap and the connection for the endotracheal catheter.
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Family
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