Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1985-01-18
1986-10-21
Recla, Henry J.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820425, A61M 1600
Patent
active
046179240
ABSTRACT:
A ventilating system includes a high frequency controlled breathing gas source in HFJV operation, wherein the exhaled gas is removed through an outlet line through which a flush gas is conducted, is improved to permit a determination, under high frequency ventilation, of both the final expiratory CO.sub.2 concentration and the basic pressure building up in the lungs (the lung-internal PEEP). To this end, the control device is in addition connected to a flush gas valve provided upstream of the breathing gas supply device, and designed to intercalate a measuring interval after a sequence of breathing gas pulses, during which interval the breathing gas valve and the flush gas valve are closed. A system of measuring the breathing gas valves is provided in the outlet line and it is actuated during the measuring interval to perform the measuring operation.
REFERENCES:
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patent: 3894536 (1975-07-01), Tysk
patent: 4345612 (1982-08-01), Koni et al.
patent: 4444201 (1984-04-01), Itoh
patent: 4481944 (1984-11-01), Bunnel
patent: 4508117 (1985-02-01), Rodari
Gebhardt Peter
Heim Ulrich
Dragerwerk AG
Recla Henry J.
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