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Ventilator apparatus for life-support and lung scan

  • US 4,267,827 A
  • Filed: 10/12/1979
  • Issued: 05/19/1981
  • Est. Priority Date: 10/12/1979
  • Status: Expired due to Term
First Claim
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1. Apparatus for ventilating patient comprising:

  • controllable motive means for generating a predetermined sequence of motive forces;

    first reservoir means for receiving an oxygen/air mixture in an amount necessary for administering said mixture to a patient for both an inhalation and exhalation phase and discharging the same to the patient in accordance with a set of predetermined ventilation parameters when the predetermined sequence of motive forces is applied thereto;

    first inspiratory path means for supplying the oxygen/air mixture discharged from the first reservoir means to the patient;

    second reservoir means for receiving an oxygen/air/traceable gas mixture in an amount necessary for administering said mixture to a patient for both an inhalation and exhalation phase and discharging the same to the patient in accordance with the set of predetermined ventilation parameters when the predetermined sequence of motive forces is applied thereto;

    second inspiratory path means for supplying the oxygen/air/traceable gas mixture discharged from the second reservoir means to the patient;

    expiratory path means for receiving expired mixture from the patient; and

    switching means for selectively applying the predetermined sequence of motive forces generated by the controllable motive means to different ones of the first and second reservoir means whereby the patient is continuously ventilated and the ventilation parameters of the predetermined set are maintained substantially constant.

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