Nasal mask
AssigneeFisher & Paykel Healthcare Limited
InventorsLewis George Gradon, Nicholas Charles Alan Smith, Alastair Edwin McAuley, Mark Joseph Haycock, Chris Earl Nightingale
Life of this patent
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Abstract
A CPAP system is described for improved respiratory therapy of patients. In particular a patient interface is disclosed with an outlet vent with lower noise levels and more diffused outlet flow over prior art outlet vents. The outlet vent includes a main vent which is diffused and muffled and a higher resistance vent provided in case the main vent is blocked. The outlet vent is removable for easy maintenance and provides indication to the user when maintenance is required. The outlet vent described may be used on nasal masks, mouthpieces and patient interfaces generally.
Claims16
In 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 and supplying said gases to said user, and at least one outlet vent integrated with or in adjacent fluid communication the improvement comprising a diffusing member adapted to in use cover said vent, and to in use diffuse and audibly muffle a substantial portion of the expired gases of said user, where at least part of said member is porous and allows said substantial portion of said expired gases to pass through said member.
In a CPAP system for delivering gases to a user including a pressurized source of gases, gases transport means in fluid communication with said pressurized source adapted to convey said gases, and a patient interface in fluid communication with said transport means in use delivering said gases to said user, said patient interface including:
- gases outlet means having at least one outlet vent, and a diffusing member covering said vent, said outlet means in use passing, diffusing and audibly muffling a substantial portion of the expired gases of said user, where at least part of said member is porous and allows said substantial portion of said expired gases to pass through said member.
A diffusing member for covering at least one vent in or adjacent a gases delivery patient interface comprising:
- a body adapted to in use pass, diffuse and audibly muffle a substantial portion of expired gases from a user and;
- means for removably connecting said body on or over a vent in or adjacent a gases delivery patient interface, wherein said diffusing member is porous.
Dependencies are inferred from the claim text.