Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1985-06-03
1986-12-23
Husar, Stephen F.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820426, 137494, A62B 902
Patent
active
046306056
ABSTRACT:
A control device for use with a respirator which has a breathing gas supply and a separate pressure gas supply comprises a gas control device housing with a connection for the patient and a bottle pressure line and a medium pressure line connected to the device and controlled by valve elements. A lung machine for respirators must guarantee, even upon failure of the important pressure reducer in the respiratory gas feed line, that the apparatus user is supplied with respiratory gas. This is done here in a simple manner by bypassing a swivel valve controlled by means of a breathing diaphragm. A piston valve, connected via a control line with the medium pressure P.sub.MD and, directly with the high pressure P.sub.HD, opens upon failure of the medium pressure and through the high pressure always present, directly a high pressure valve contained in the piston valve. The respiratory gas can then flow into the lung machine in adequate quantity and is expanded therein in any event, in order then to get to the apparatus user by the normal route.
REFERENCES:
patent: 3508542 (1970-04-01), Browner
patent: 3957044 (1976-05-01), Fletcher et al.
patent: 4440166 (1984-04-01), Winkler et al.
Dragerwerk AG
Husar Stephen F.
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