Breathing assistance apparatus

Details Breathing assistance apparatus Breathing assistance apparatus

A - Human Necessities

61

M

A61M 16/00 (2006.01) A61M 16/06 (2006.01) A61M 16/16 (2006.01)

Patent

CA 2474925

The present invention relates to the delivery of high flow humidified pressurised oxygen and/or air to a patient by way of a wide bore nasal cannula (30). The cannula of the present invention comprises wide bore cannula to minimise the flow resistance and the entry velocity. The nasal cannula includes two nasal prongs (40, 41) fittable into a patient's nostrils. The prongs follow the inner shape of the patient's nostrils such that a more efficient flow of gases into the patient's lungs is achieved as gases flow are directed down the main nasal passage more accurately. The cannula do not seal within the nasal cavities of the patient, and in some embodiments the cannula may be provided with a pressure relief valve to allow gases to be exhausted from the cannula.

la présente invention concerne l'administration d'oxygène et/ou d'air humidifié sous pression, à fort débit, à l'aide d'une canule nasale à large orifice (30). Ce large orifice a pour effet de réduire la résistance à l'écoulement et la vitesse d'entrée. La canule nasale comporte deux branches nasales (40, 41) qui s'adaptent dans les narines du patient. Ces branches, qui épousent la forme intérieure des narines, favorisent l'écoulement gazeux dans les poumons du patient, du fait que les gaz sont acheminés avec une plus grande précision dans le passage nasal principal. La canule n'obstrue pas les cavités nasales du patient et, dans certaines réalisations, peut être dotée d'une soupape de surpression qui permet aux gaz de s'échapper de la canule.

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