Methods and apparatus for varying the back-up rate for a ventilator
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United States of America Patent
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Jun 9, 2015
Grant Date -
Sep 5, 2013
app pub date -
Apr 25, 2013
filing date -
Mar 7, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A ventilator device delivers ventilatory support to a patient in a back up timed mode when patient respiration is not detected or a spontaneous mode when patient respiration is detected. The timing threshold governing the back-up mode is chosen to deviate from normal expected respiration time for the patient to promote patient initiated ventilation in the spontaneous mode but permit back-up ventilation in the event of apnea. Automated adjustments to the timing threshold during the timed mode are made from the less vigilant timing threshold to a more vigilant threshold at or near a timing of normal expected breathing of the patient. Such adjustments may be made from a minimum to a maximum vigilance timing settings or incrementally there between as a function of time in the timed mode which is preferably the number of delivered machine breaths.
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