High frequency breath pump
First Claim
1. Apparatus for pumping breathable gas from a pressurized source into and out of the proximal airway of a patient, comprising:
- conduit means adapted for fluid connection to said proximal airway;
inhalation means, fluidly connected between said source and said conduit means, for alternately (a) receiving a first selected volume of gas from said source during an expiratory phase of the respiratory cycle of said patient, and (b) delivering said first selected volume of gas to said conduit means during the subsequent inspiratory phase of the respiratory cycle;
exhalation means, fluidly connected to said conduit means, for alternately (a) withdrawing a second selected volume of gas from said conduit means during an expiratory phase of said respiratory cycle, and (b) venting said second selected volume of gas to atmosphere during the next inspiratory phase of said respiratory cycle;
driving means for driving in synchronism both of said inhalation and exhalation means alternately forcing gas therefrom during a corresponding inspiratory phase and drawing gas thereto during a corresponding expiratory phase; and
volume adjustment means for independently adjusting said first and second selected volumes.
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Accused Products
Abstract
A system for sequentially providing a volume of gas containing a high frequency oscillation to a proximal airway. In a preferred embodiment a control means periodically drives in synchronism both inhalation and exhalation means into an inspiratory phase of an oscillatory cycle and then into an expiratory phase of the oscillatory cycle. The inhalation means during the inspiratory phase delivers a volume of fresh gas to the proximal airway of a patient, and during the expiratory phase refills itself from a source of low pressure gas while simultaneously blocking therefrom expired gas from the proximal airway. The exhalation means during the inspiratory phase vents to atmosphere expired gas withdrawn from the proximal airway during the previous expiratory phase and simultaneously blocks therefrom fresh gas from said inhalation means and during the expiratory phase extracts the expired volume of gas from the proximal airway.
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Citations
6 Claims
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1. Apparatus for pumping breathable gas from a pressurized source into and out of the proximal airway of a patient, comprising:
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conduit means adapted for fluid connection to said proximal airway; inhalation means, fluidly connected between said source and said conduit means, for alternately (a) receiving a first selected volume of gas from said source during an expiratory phase of the respiratory cycle of said patient, and (b) delivering said first selected volume of gas to said conduit means during the subsequent inspiratory phase of the respiratory cycle; exhalation means, fluidly connected to said conduit means, for alternately (a) withdrawing a second selected volume of gas from said conduit means during an expiratory phase of said respiratory cycle, and (b) venting said second selected volume of gas to atmosphere during the next inspiratory phase of said respiratory cycle; driving means for driving in synchronism both of said inhalation and exhalation means alternately forcing gas therefrom during a corresponding inspiratory phase and drawing gas thereto during a corresponding expiratory phase; and volume adjustment means for independently adjusting said first and second selected volumes. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification