Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1997-02-03
1999-02-09
Asher, Kimberly L.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820418, A61M 1600, A62B 700, F16K 3102
Patent
active
058681337
ABSTRACT:
A ventilator device and system comprising a rotating compressor, preferably a drag compressor, which, at the beginning of each inspiratory ventilation phase, is accelerated to a sufficient speed to deliver the desired inspiratory gas flow, and is subsequently stopped or decelerated to a basal flow level to permit the expiratory ventilation phase to occur. The ventilator device is small and light weight enough to be utilized in portable applications. The ventilator device is power efficient enough to operate for extended periods of time on internal or external batteries. Also provided is an oxygen blending apparatus which utilizes solenoid valves having specific orifice sizes for blending desired amounts of oxygen into the inspiratory gas flow. Also provided is an exhalation valve having an exhalation flow transducer which incorporates a radio frequency data base to provide an attendant controller with specific calibration information for the exhalation flow transducer. Stored, individualized compressor characterization information is used to control the acceleration and deacceleration of the rotating compressor.
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Cegielski Michael J.
DeVries Douglas F.
Graves, Jr. Warner V.
Holmes Michael B.
Williams Malcolm R.
Asher Kimberly L.
Bird Products Corporation
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