Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Reexamination Certificate
2006-07-18
2006-07-18
Lewis, Aaron J. (Department: 3743)
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
C128S204230, C128S205110, C128S207180
Reexamination Certificate
active
07077133
ABSTRACT:
A small oxygen enriching apparatus which can supply oxygen-enriched gas at high flow rate without imparting unnatural sensation to a user, as well as a controller and recording medium therefore. In step100,a judgment is made as to whether a flow rate set by use of a flow-rate setting unit45is equal to or less than a continuous base flow rate (3 liters/min). When the set flow rate is a low flow rate of not greater than 3 liters/min, breath-synchronized operation is not performed (continuous supply is to be performed), and therefore, in step110,oxygen-enriched gas is supplied continuously at the set flow rate. When the set flow rate is a high flow rate of greater than 3 liters/min, breath-synchronized operation is to be performed, and therefore, in step120,the orifice is set to an opening that enables supply at 5 liters/min. In step140,in order to perform breath-synchronized operation, control for opening and closing an electromagnetic valve47is performed. Through this operation, the oxygen-enriched gas is supplied at a high flow rate (5 liters/min) in the inhalation period of each breathing cycle and at a low flow rate (2 liters/min) in the exhalation period via a bypass flow passage50.
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Akiyama Junichi
Yagi Hideaki
Lewis Aaron J.
NGK Spark Plug Co. Ltd.
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