Variable flow and pressure ventilation system
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United States of America Patent
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-
Aug 28, 2001
Grant Date -
N/A
app pub date -
Dec 4, 1998
filing date -
Dec 4, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A ventilation system supplies a gas mixture that is humidified and heated through a proportional valve which is a fail closed and normally closed servo control valve positioned proximate a patient. The proportional valve is operated by a controller that regulates the pressure and the mode (e.g., high frequency, normal respiration, combinations) gas is delivered to the patient through a nozzle connected to the endotracheal tube. The nozzle has an exhaust connected to it and a pressure sensor through a pressure sensing port. The exhaust is a capped corrugated tube that is heated and perforated to allow air to escape, to muffle gas and respiration noises, and to trap moisture.
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