Ventilator apparatus for life-support and lung scan

Details Ventilator apparatus for life-support and lung scan Ventilator apparatus for life-support and lung scan

1979-10-12

1981-05-19

Recla, Henry J.

Surgery

Truss

Perineal

12820515, A61B 600

Patent

active

042678277

ABSTRACT:
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 O.sub.2 concentration analyzer, and a CO.sub.2 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.

REFERENCES:
patent: 3769967 (1973-11-01), Jones et al.
patent: 3881463 (1975-05-01), LeMon
patent: 3890959 (1975-06-01), Yondin et al.
patent: 4076021 (1978-02-01), Thompson
patent: 4202345 (1980-05-01), Farella et al.

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