Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1991-08-27
1994-04-19
Burr, Edgar S.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820425, 12820524, A61M 1600
Patent
active
053036980
ABSTRACT:
A medical ventilator is provided for providing continuous, closed-loop control of the pressure of gas within a patient's mouth or respiratory tract in accordance with any selected pressure input waveform. The medical ventilator comprises an adaptive, feedback controller which provides independent control of the inspiratory and expiratory branches of the ventilator, while continuously controlling mouth pressure. The digital coefficients of the controller are updated to adjust for variations in the resistance of the patient's respiratory tract resulting from the magnitude of flow of inspiratory gas into the tract and patient-to-patient differences. Pressure in the expiratory branch is controlled by controlling, through a pressure-regulating valve, the magnitude of back pressure applied to a diaphragm valve. A venturi provides a reference pressure for the pressure-regulating valve below that of the surrounding atmosphere to enable application of a negative back pressure to the diaphragm valve.
REFERENCES:
patent: 3741208 (1973-06-01), Jonsson
patent: 4001700 (1977-01-01), Cook
patent: 4036221 (1977-07-01), Hillsman
patent: 4393869 (1983-07-01), Boyarsky et al.
patent: 4448192 (1984-05-01), Stawitcke et al.
patent: 4457304 (1984-07-01), Molnar
patent: 4459982 (1984-07-01), Fry
patent: 4520812 (1985-06-01), Freitag
patent: 4533346 (1985-08-01), Cosgrove
patent: 4602653 (1986-07-01), Ruiz-Vela
patent: 4766894 (1988-08-01), Legrand
patent: 4838257 (1989-06-01), Hatch
patent: 4838259 (1989-06-01), Gluck
patent: 4971049 (1990-11-01), Rotario
patent: 5072729 (1991-12-01), Devries
patent: 5072737 (1991-12-01), Goulding
patent: 5092326 (1992-03-01), Winn
patent: 5107830 (1992-04-01), Younes
patent: 5183038 (1993-02-01), Hoffman
Chilcoat Robert T.
Fischer Russell J.
Tobia Ronald L.
Burr Edgar S.
Cassett Larry R.
Dompieri Arnold
Raciti Eric P.
Rathbun Roger M.
LandOfFree
Medical ventilator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Medical ventilator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Medical ventilator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-14205