Controllable expiration valve arrangement for a ventilating appa

Details Controllable expiration valve arrangement for a ventilating appa Controllable expiration valve arrangement for a ventilating appa

1989-06-30

1991-11-12

Burr, Edgar S.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820426, 12820418, A62B 902, A61M 1600

Patent

active

050639250

ABSTRACT:
The invention is directed to a controllable expiration valve having a control valve for generating an end expiratory overpressure with the control valve providing the changeable control pressure. The expiration valve is improved so that it is made controllable for compensating dynamic end expiratory overpressure. For this purpose, the membrane chamber of the expiration valve as well as the outflow chamber of the control valve are connected with a device for generating an underpressure.

REFERENCES:
patent: 3385295 (1968-05-01), Beasley
patent: 3486502 (1969-12-01), Wilson
patent: 3905362 (1975-09-01), Eyrick et al.
patent: 4190045 (1980-02-01), Bartels
patent: 4227523 (1980-10-01), Warnow et al.
patent: 4454893 (1984-10-01), Orchard
patent: 4813409 (1989-03-01), Ismach

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