Method and computer software product for controlling an expiratory valve in a ventilator
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United States of America Patent
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May 20, 2003
Grant Date -
N/A
app pub date -
Jul 14, 2000
filing date -
Jul 15, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a method for controlling an expiratory valve in a ventilator during expiration, including a stage in which the expiratory valve is opened almost completely for a first interval. Opening the expiratory valve almost completely results in a reduction in expiratory resistance. Thus in the first interval of flow or pressure in the expiratory part of the ventilator, a determination is made when the flow or pressure in the expiratory part meets a condition. A second interval is started when the flow in the expiratory part meets the condition and the expiratory valve is regulated during the second interval in order to attain a pre-set end pressure in the expiratory section.
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