Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1979-02-12
1981-03-17
Recla, Henry J.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820524, 12820515, 137599, A61M 1600
Patent
active
042561000
ABSTRACT:
An anesthesia ventilator is disclosed for controlling the flow of air and/or oxygen through a plurality of binary weighted valves from a fluid regulator source to a bellows assembly. Directly-set minute volume, breath rate and inspiration to expiration ratio controls operate electronic circuitry which adjusts the magnitude of the flow, the tidal volume and the inhalation to exhalation times. The circuitry includes alarm detecting devices for alerting personnel that a patient should be ventilated manually, that a patient is disconnected from the instrument, that control settings exceed specifications for the instrument, that undesired low gas pressure exists and that actual inspiration to expiration is less than that of the control setting. Flow and tidal volume limiting apparatus is provided, together with sigh circuitry and devices for correcting for altitude and gas parameters.
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Levy Donald
Rusz Tibor
Padden Frederick W.
Recla Henry J.
Rule Medical Instruments, Inc.
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