Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1996-06-21
1998-08-04
Asher, Kimberly L.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820524, A62B 904, A62B 704, A61M 1600, F16K 3126
Patent
active
057878820
ABSTRACT:
A demand valve resuscitator includes an inlet for connection to a pressurized source of breathable gas, such as oxygen, and an outlet for connection to a patient's airway. A normally-closed-pressure-actuated main valve is positioned between the inlet port and an inhalation chamber for controlling the demand mode of operation. A main valve controller operates the main valve in response to a reduced pressure in the inhalation chamber resulting from the commencement of spontaneous breathing by the patient. The manual operating mode, i.e., not dependent upon the patient breathing spontaneously, is controlled by a bypass valve which supplies gas to the patient independently of the main valve. A manually adjustable pressure relief valve sets the peak gas pressure. Another manual control permits the operator to preset the maximum opening of the bypass valve and therefore the flow rate of gas to the patient.
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Asher Kimberly L.
Computer Assisted Engineering
Jackson Harold L.
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