Nasal mask
First Claim
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1. A device for delivering a supply of gases to a user comprising a patient interface, in use in fluid communication with said supply of gases, engaging with said user and thereby supplying said gases to said user;
- and outlet means being integrated with or in fluid communication with said patient interface, said outlet means comprising;
a valve body including an internal passage, in use at least a portion of said gases flowing through said internal passage, an external vent, and a flexible flap operatively connected to said valve body and having at least two configurations, a first configuration in use during inspiration of said patient substantially blocking said vent and a second configuration in use with said vent passing expired gases from said patient, said flexible flap externally connected to said valve body, a biasing means adapted to retain or actuate said flexible flap between said first configuration and said second configuration, wherein said biasing means is a venturi in said internal passage.
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Abstract
A system is disclosed comprising a high pressure gases source: for example a compressor, a low cross section conduit adapted to convey gases from the compressor, and a patient interface delivering gases to the patient. The patient interface includes valve member which is substantially closed during inspiration and venting externally during expiration. The combination of the low cross section and lightweight conduit and the valve member result in increased patient comfort.
83 Citations
13 Claims
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1. A device for delivering a supply of gases to a user comprising a patient interface, in use in fluid communication with said supply of gases, engaging with said user and thereby supplying said gases to said user;
- and outlet means being integrated with or in fluid communication with said patient interface, said outlet means comprising;
a valve body including an internal passage, in use at least a portion of said gases flowing through said internal passage, an external vent, and a flexible flap operatively connected to said valve body and having at least two configurations, a first configuration in use during inspiration of said patient substantially blocking said vent and a second configuration in use with said vent passing expired gases from said patient, said flexible flap externally connected to said valve body, a biasing means adapted to retain or actuate said flexible flap between said first configuration and said second configuration, wherein said biasing means is a venturi in said internal passage. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- and outlet means being integrated with or in fluid communication with said patient interface, said outlet means comprising;
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8. A valve for use with a patient interface, for delivering breathing assistance in the form of gases to a patient, said valve being integrated with or in fluid communication with said patent interface, said valve comprising:
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a valve body including an internal passage, in use at least a portion of said gases flowing through said internal passage, an external vent, and a flexible flap operatively connected to said valve body and having at least two configurations, a first configuration in use during inspiration of said patient substantially blocking said vent and a second configuration in use with said vent passing expired gases from said patient, said flexible flap externally connected to said valve body, a biasing means adapted to retain or actuate said flexible flap between said first configuration and said second configuration, wherein said biasing means is a venturi in said internal passage. - View Dependent Claims (9, 10, 11, 12)
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13. A system for delivering respiratory gases to a user comprising:
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a high pressure gases source, a low cross section conduit adapted to convey gases from said gases source, a patient interface including an internal passage and adapted to deliver gases from said conduit to said patient, and a flexible flap operatively connected to said patient interface and having at least two configurations, a first configuration in use during inspiration of said patient substantially closed and a second configuration in use externally venting expired gases from said patient said flexible flap externally connected to said valve body, a biasing means adapted to retain or actuate said flexible flap between said first configuration and said second configuration, wherein said biasing means is a venturi in said internal passage.
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Specification