Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1986-04-30
1987-07-28
Recla, Henry J.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820511, A61M 1600
Patent
active
046825916
ABSTRACT:
A portable resuscitator/ventilator device especially intended for emergency use and powered by pressurized primary breathable gas such as oxygen or compressed air from a bottle comprises a control unit that outputs primary gas pulses to a patient valve that includes an entrainment mixer for diluting the primary gas with air. The entrainment mixer is selectively operable to that the patient valve delivers primary gas or air-diluted primary gas as required. The control unit includes a fixed value flow-control restrictor that passes a required tidal volume of primary gas for undiluted delivery to the patient and the impedance of the patient valve is arranged to increase when the entrainment mixer is operational so that flow of the primary gas is automatically reduced to provide the required tidal volume of air-diluted primary gas without wastage of primary gas or any adjustment of the control unit.
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patent: 3485243 (1969-12-01), Bird et al.
patent: 3762408 (1973-10-01), Cox et al.
patent: 3881480 (1975-05-01), Lafourcade
patent: 4186737 (1980-02-01), Valenta et al.
patent: 4401115 (1983-08-01), Monnier
patent: 4401116 (1983-08-01), Fry et al.
Pneupac Limited
Recla Henry J.
Silverman Arnold B.
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