Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1984-12-06
1987-05-26
Recla, Henry J.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820428, 12820222, A61M 1600
Patent
active
046676694
ABSTRACT:
A cycle respirator for pressure operation makes sure that in the respiratory cycle a positive pressure relative to the ambient atmosphere always prevails. During the exhaling phase this positive pressure is undesirable because he (the user) is additionally burdened unnecessarily during exhalation. The invention includes a sensor connected with a measuring circuit which can distinguish between inhalation phase and exhalation phase and activates through a measuring circuit an auxiliary device by which the positive pressure is reduced during the exhalation phase. Across an electric resistance path a voltage difference drops which varies in accordance with the stroke movements of the breathing bag. This varying voltage difference is used as a measurement signal for the switching of the auxiliary device, whereby the positive pressure in the respiratory cycle is created in the respiratory cycle only during the inhaling phase, but is reduced during the exhaling phase.
REFERENCES:
patent: 2972345 (1961-02-01), Spigel
patent: 3033195 (1962-05-01), Gilroy et al.
patent: 3339545 (1967-09-01), Burchell
patent: 3840006 (1974-10-01), Buck et al.
patent: 3850170 (1974-11-01), Cox
patent: 4036221 (1977-07-01), Hillsman et al.
Dr/a/ gerwerk AG
Recla Henry J.
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