Respiratory device measurement system

Details Respiratory device measurement system Respiratory device measurement system

A - Human Necessities

61

M

A61M 16/00 (2006.01)

Patent

CA 2611603

A gas delivery system (12) comprising a pressure generator (14), a pressure sensor (21), a control valve (20), and a processor (32). The pressure generator (14) pressurizes breathable gas (22) for delivery to a patient. The pressure sensor (21) measures a pressure difference between the pressurized breathable gas (22) and atmospheric pressure. The control valve (20) is disposed downstream from the pressure generator (14) and is constructed and arranged to control a flow rate of the pressurized breathable gas (22). The processor (32) controls the control valve (20) to bring the flow rate of the pressurized breathable gas (22) to substantially zero while the pressure generator (14) is operating and, when the flow rate is substantially zero, determines at least one of atmospheric pressure, an atmospheric air density, or a density correction factor based at least in part on the pressure difference between the pressurized breathable gas (22) and the atmospheric pressure.

L'invention concerne un système (12) de distribution de gaz comprenant un générateur (14) de pression, un capteur (21) de pression, une valve (20) de commande, et un processeur (32). Le générateur (14) de pression pressurise un gaz respirable (22) pour le distribuer à un patient. Le capteur (21) de pression mesure une différence de pression entre le gaz respirable (22) pressurisé et la pression atmosphérique. La valve (20) de commande est disposée en aval du générateur (14) de pression, et est configurée et disposée de manière à régler le débit du gaz respirable (22) pressurisé. Le processeur (32) commande la valve (20) de commande de manière à obtenir un débit de gaz respirable (22) pressurisé de sensiblement zéro, tandis que le générateur (14) de pression est utilisé, lorsque le débit est de sensiblement zéro, et détermine au moins la pression atmosphérique, la densité de l'air atmosphérique, ou un facteur de correction de densité, au moins en partie en fonction de la différence de pression entre le gaz respirable (22) pressurisé et la pression atmosphérique.

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