Proportional pressure assist ventilation controlled by a diaphragm electromyographic signal
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United States of America Patent
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Jul 26, 2005
Grant Date -
Dec 11, 2003
app pub date -
Apr 2, 2003
filing date -
Jun 4, 1998
priority date (Note) -
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Abstract
A closed loop system uses (a) the intensity of the diaphragm electromyogram (EMG) for a given inspiratory volume; (b) the inspiratory volume for a given EMG intensity; or (c) a combination of (a) and (b); in view of controlling the level of gas flow, gas volume or gas pressure delivered by a mechanical (lung) ventilator. The closed loop ventilator system enables for automatic or manual adjustment of the level of inspiratory support in proportion to changes in the neuro-ventilatory efficiency such that the neural drive remains stable at a desired target level. An alarm can also be used to detect changes in neuroventilatory efficiency in view of performing manual adjustments.
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