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High frequency breath pump

  • US 4,351,329 A
  • Filed: 11/06/1980
  • Issued: 09/28/1982
  • Est. Priority Date: 11/06/1980
  • Status: Expired due to Term
First Claim
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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:

  • 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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