초록 ▼

Two identical bag-in-bottle bellows assemblies are provided for separately receiving and discharging breathable oxygen/air and oxygen/air/Xenon gas mixtures. An adjustable piston/cylinder gas pump is connected with the bellows assemblies through a system of conduits and valves for selectively operat

Two identical bag-in-bottle bellows assemblies are provided for separately receiving and discharging breathable oxygen/air and oxygen/air/Xenon gas mixtures. An adjustable piston/cylinder gas pump is connected with the bellows assemblies through a system of conduits and valves for selectively operating the bellows of either assembly. Hoses are interconnected between the bellows and a patient mask to form inspiratory and expiratory paths. The expiratory path includes a PEEP valve, a pressure actuated exhalation valve, an O2 concentration analyzer, and a CO2 absorber. The apparatus is capable of being instantaneously switched between the isolated oxygen/air and oxygen/air/Xenon delivery systems while continuously ventilating the patient and maintaining ventilation parameters (ventilation rate, inspiratory time, oxygen concentration, end-expiratory pressure, and tidal volume) substantially constant.

대표청구항 ▼

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 a

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.