Method and apparatus to counterbalance intrinsic positive end expiratory pressure
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United States of America Patent
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Jul 8, 2003
Grant Date -
N/A
app pub date -
Jan 13, 2000
filing date -
Jan 15, 1999
priority date (Note) -
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Abstract
The invention prevents dynamic airway compression during ventilatory support of a patient. The respiratory airflow is determined by measurement or calculation, and a measure of the degree of dynamic airway compression is derived from the determined airflow. This measure is servo-controlled to be zero by increasing expiratory pressure if the measure of the degree of dynamic airway compression is large or increasing, and by reducing expiratory pressure if the measure of the degree of dynamic airway compression is small or zero.
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