Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1993-11-23
1995-08-22
Burr, Edgar S.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820524, A61M 1600
Patent
active
054430623
ABSTRACT:
A load activated oxygen delivery system is configured to deliver oxygen from an oxygen source to a patient through a cannula. The oxygen delivery system includes a precharge chamber for holding oxygen, the precharge chamber having an inlet and an outlet, with the inlet connected to the oxygen source, and a slave chamber providing fluid communication between the cannula and the outlet of the precharge chamber. A diaphragm is positioned to seal the outlet of the precharge chamber to block flow of oxygen from the precharge chamber into the slave chamber. A separate actuating chamber is positioned adjacent to the slave chamber in fluid communication with the diaphragm, with pressure decrease in the actuating chamber relative to the slave chamber causing the diaphragm to move away from the outlet of the precharge chamber, allowing flow of oxygen from the precharge chamber, through the slave chamber, and into the cannula. Decreasing pressure in the actuating chamber is triggered by an electronic pressure sensor that opens a valve.
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Burr Edgar S.
Lewis Aaron J.
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