Expiratory volume reservoir for a ventilator patient circuit
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United States of America Patent
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Dec 1, 2015
Grant Date -
Apr 30, 2009
app pub date -
Oct 24, 2007
filing date -
Oct 24, 2007
priority date (Note) -
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Abstract
A ventilating system for providing inspiratory air to and receiving expiratory air from a patient in a respiratory cycle. A ventilator has an inspiratory outlet for providing inspiratory air and an expiratory inlet for receiving expiratory air. A patient circuit in fluid communication with the lungs of the patient conveys inspiratory air during the inspiratory phase and expiratory air during the expiratory phase. A flow transducer in fluid communication with the patient circuit detects a minimum volume of expiratory air in the patient circuit during the expiratory phase. An elastic reservoir in fluid communication with the patient circuit and the flow transducer expands to a first volume during the inspiratory contracts to a second volume during the expiratory phase. The volume difference between the first volume and the second volume is at least equal to the minimum volume threshold.
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