Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1989-12-28
1991-12-10
Burr, Edgar S.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820418, 12820426, A62B 902
Patent
active
050708716
ABSTRACT:
A valve for an anaesthetic rebreathing system includes a valve body and a valve closure member situated within the valve body. The valve can be converted between a Mapleson A and a Mapleson D configuration. The valve body includes a fresh gas inlet, a fresh gas outlet, a fresh gas conduit in communication with the fresh gas inlet and the fresh gas outlet, an expired gas inlet/outlet port, a waste gas outlet, an expired gas conduit in communication with the expired gas inlet/outlet port and the waste gas outlet, a reservoir bag inlet/outlet port and a reservoir bag conduit in communication with the reservoir bag inlet/outlet port. All the conduits converge at a node within which the valve closure member is operable to isolate the expired gas inlet/outlet port and the waste gas outlet from the reservoir bag inlet/outlet port in a first position thereof and to isolate the fresh gas inlet and the fresh gas outlet from the reservoir bag inlet/outlet port in a second position thereof.
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Anaesthesia, 1983, vol. 38, pp. 361-372, Humphrey, "A New Anaesthetic Breathing System . . . ".
"The Johannesburg A-D Circuit Switch" published in The British Journal of Anaesthesia. (1979), 51, 1185.
Asher Kimberly L.
Burr Edgar S.
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