Anaesthetic mask
First Claim
Patent Images
1. An anaesthetic mask comprising:
- a wall forming a respiratory chamber having a rim sized and configured to generally conform to a selected area surrounding the nose and/or mouth of a patient, said rim having a closed-loop perimeter and a generally "Y"-shaped cross section;
an anaesthetic gas inlet mechanically associated with said respiratory chamber for connection to an anaesthetic gas supply;
an exhaust outlet mechanically associated with said respiratory chamber for connection with a vacuum supply;
a face seal connected to said rim, said seal including;
a closed-loop seal body defining a vacuum channel therein and further including a plurality of openings arranged to provide gas intercommunication between said vacuum channel and the exterior of said seal body, said seal body enclosing said rim andvacuum connection means for providing gas intercommunication between said vacuum channel and said vacuum supply.
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Abstract
The present invention provides an improved anaesthetic scavenging face mask having a scavenging channel running along the perimeter of the mask. The mask is provided with an anaesthetic gas inlet and a vacuum outlet. The scavenging channel is connected to the vacuum outlet.
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Citations
22 Claims
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1. An anaesthetic mask comprising:
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a wall forming a respiratory chamber having a rim sized and configured to generally conform to a selected area surrounding the nose and/or mouth of a patient, said rim having a closed-loop perimeter and a generally "Y"-shaped cross section; an anaesthetic gas inlet mechanically associated with said respiratory chamber for connection to an anaesthetic gas supply; an exhaust outlet mechanically associated with said respiratory chamber for connection with a vacuum supply; a face seal connected to said rim, said seal including; a closed-loop seal body defining a vacuum channel therein and further including a plurality of openings arranged to provide gas intercommunication between said vacuum channel and the exterior of said seal body, said seal body enclosing said rim and vacuum connection means for providing gas intercommunication between said vacuum channel and said vacuum supply. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An anaesthetic mask, comprising:
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a wall forming a cup shaped respiratory chamber adapted to be placed on the face over the nose and/or mouth of a patient, said respiratory chamber having a closed-loop shaped rim sized and configured to generally conform to a patient'"'"'s face when said mask is placed upon the nose and/or mouth area of a patient'"'"'s face, said rim having a generally "Y"-shaped cross section; an anaesthetic gas inlet connected to said respiratory chamber for connection to an anaesthetic gas supply and to provide gas intercommunication between said gas supply and said respiratory chamber; a vacuum outlet connected to said respiratory chamber for connection to a vacuum supply to provide gas intercommunication between said vacuum supply and said respiratory chamber; a closed-loop seal body formed of a flexible rubber-like material being sized and configured to generally conform to said rim of said chamber to seal against a patient'"'"'s face and having a closed-loop shaped channel which connects to said rim by means of said closed-loop shaped channel enclosing said rim, said rim air-tightly sealing said closed-loop shaped channel so that an interior tubular space between said closed-loop shaped channel and said rim forms a vacuum channel, said seal body having a plurality of openings to provide gas intercommunication between said vacuum channel and an exterior surface of said seal body; and a tube mechanically associated with said seal body and said vacuum supply to provide gas intercommunication between said vacuum channel and said vacuum supply. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification