Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1985-06-07
1987-01-20
Recla, Henry J.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820425, 12820524, 137883, A61M 1600
Patent
active
046373861
ABSTRACT:
A ventilation system with positive and negative ventilation pressures controllable through a control unit is to be improved with respect to its adaptability, in particular in the generation of high pulse repetition frequencies above the natural breathing frequency. A gas transport element is provided in connection with a ring line which contains an inhalation valve in an inspiration branch and an exhalation valve in an expiration branch. The desired improvement is obtained by the fact that the gas transport element is arranged in the ring line with constant direction of delivery. By alternate control of the inhalation valve and exhalation valve in a closed system inspiration and expiration pulses are produced. In addition, a controllable valve unit is indicated in which the inhalation valve and the exhalation valve are actuated as diaphragm valves by combined injector and ejector units of low inertia.
REFERENCES:
patent: 2737178 (1956-03-01), Fox
patent: 3465752 (1969-09-01), Brychta et al.
patent: 3741208 (1973-06-01), Jonsson et al.
patent: 3916888 (1975-11-01), Buck et al.
Dragerwerk AG
Recla Henry J.
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