Method and apparatus for mask free delivery of an inspired...

A - Human Necessities – 61 – M

Patent

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Details

A61M 16/00 (2006.01) A61B 5/097 (2006.01) A61M 16/06 (2006.01) A61B 5/083 (2006.01)

Patent

CA 2412485

Disclosed is an apparatus and method for the delivery of inspired gas, e.g., supplemental O2, to a person combined with gas sampling, including for the purpose of monitoring of the ventilation of the person. In the invention, the delivery of inspired gas and gas sampling are accomplished without the use of a sealed face mask. The apparatus of one embodiment of the present invention comprises an oxygen delivery device, nasal airway pressure sampling devices, optionally an oral airway pressure sampling device and at least one pressure analyzer connected to the sampling devices which determine the phase of the person's respiration cycle and the person's primary airway. The oxygen delivery device is connected to a controller such that it delivers a higher flow of oxygen to the person during the inhalation phase of the person's respiratory cycle. The invention thus increases end tidal oxygen concentrations. The invention further comprises carbon dioxide sampling tubes that continuously sample gas from two nasal sites and the mouth. The nasal sampling tubes are connected to a switching valve that is in turn connected to a capnometer which determines carbon dioxide concentration during exhalation. The oral gas sampling site is connected to a second capnometer.

L'invention concerne un appareil et un procédé d'apport de gaz à inspirer, notamment d'oxygène d'appoint, à une personne, et de prélèvement de gaz, servant à la régulation de la ventilation d'une personne. Dans cette invention, l'apport de gaz à inspiré et le prélèvement de gaz sont effectués sans masque facial étanche. L'appareil de l'un des mode de réalisation de l'invention comprend un dispositif d'apport d'oxygène, des services de prélèvement de la pression des voies respiratoires nasales, et éventuellement un dispositif de prélèvement de la pression des voies respiratoires orales, ainsi qu'au moins un analyseur de pression relié aux dispositifs de prélèvement, lequel détermine la phase du cycle de respiration de la personne et les voies respiratoires primaires de celle-ci. Le dispositif d'apport d'oxygène est relié à un organe de commande de manière à libérer un flux d'oxygène plus important à la personne pendant la phase d'inhalation du cycle respiratoire. Cette invention permet donc d'augmenter les concentrations en oxygène en fin d'expiration. L'invention comprend, en outre, des tubes de prélèvement de dioxyde de carbone, lesquels prélèvent en continu du gaz des sites nasaux et de la bouche. Ces tubes sont reliés à une soupape de commutation qui est parfois reliée à un capnomètre, lequel détermine la concentration de dioxyde de carbone lors de l'expiration. Le site de prélèvement de gaz oral est relié à un second capnomètre.

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