Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1986-05-23
1989-02-21
Howell, Kyle L.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820524, 137102, 417183, A61M 1600
Patent
active
048056138
ABSTRACT:
Ventilator adapted to be connected to a source of gas under pressure comprising a case and an inlet adapted to be connected to the source of gas. It also is comprised of an oscillator cartridge carried by the case and having a body with an inlet and an outlet and a flow passage interconnecting the inlet and the outlet. A valve member is carried by the body and is movable between open and closed positions with respect to the outlet. A diaphragm is carried by the body and is connected to the valve member for moving the valve member between and open and closed positions to interrupt the flow of gas in the flow passage between the inlet and the outlet. A servo port is carried by the body for supplying gas to the diaphragm for causing movement of the diaphragm to thereby cause movement of the valve member to the closed position to interrupt the flow of gas in the flow passage between the inlet and the outlet. An adjustable metering valve meters the flow of gas from the outlet to the servo port to provide for cyclic operation of the oscillation cartridge between inspiratory and expiratory phases. A patient adapter having an inlet and an outlet and a pneumatic clutching device having an inlet and an outlet is coupled to the inlet of the patient adapter. The outlet of the oscillator cartridge is coupled to the inlet of the pneumatic clutching device. The adjustable metering valve has a single control knob which changes the frequency of cyclic operation and the ratio between the inspiratory phase and the expiratory phase.
REFERENCES:
patent: 4243155 (1981-01-01), Stewart
patent: 4437461 (1984-03-01), Greenberg
patent: 4502481 (1985-03-01), Christian
patent: 4592349 (1986-06-01), Bird
patent: 4624251 (1986-11-01), Miller
Howell Kyle L.
Sykes Angela D.
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