A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 16/00 (2006.01) A61M 1/16 (2006.01) A61M 16/10 (2006.01) A61M 16/12 (2006.01) A61M 1/36 (2006.01) A61M 16/22 (2006.01)
Patent
CA 2484066
A medical device (103) is supplied (105) with a gas mixture from a higher pressure section of a main circuit (102) in which medical gas recirculates through the higher pressure section and a lower pressure section. Decontaminated spent gas is returned to the lower pressure section of the main circuit. Pressure in the higher pressure section is maintained by a pressure maintaining valve (141) and gas flow in the main circuit is maintained by a volume regulator (145) in the lower pressure section. The composition of the recirculating gas mixture is maintained by addition of respective feed gases in response to concentration and/or volume variation measurement. The method has particular application to the feed of a binary oxygen/xenon mixture to a cardiopulmonary bypass oxygenator or an artificial ventilator.
Un dispositif médical (103) est alimenté (105) en un mélange gazeux provenant d'une partie haute pression d'un circuit principal (102) dans lequel du gaz médical recircule en passant par la partie haute pression et une partie basse pression. Le gaz utilisé décontaminé est renvoyé dans la partie basse pression du circuit principal. La pression de la partie haute pression est entretenue par une soupape de compensation des fuites (141), le flux gazeux du circuit principal étant entretenu par un régulateur de volume (145) dans la partie basse pression. La composition du mélange gazeux en recirculation est entretenue par adjonction des différents gaz d'alimentation en réaction aux mesures d'écarts de concentration et/ou de volume. Le procédé convient particulièrement pour l'alimentation en mélange binaire oxygène/xénon d'un oxygénateur à dérivation cardio-pulmonaire ou d'un ventilateur artificiel.
Downie Neil Alexander
Kerr Stuart Alexander
Air Products And Chemicals Inc.
Mcfadden Fincham
LandOfFree
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