Nasal and oral cannula having two capabilities and method of...

A - Human Necessities – 61 – M

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A61M 15/08 (2006.01) A61G 10/00 (2006.01) A61M 16/00 (2006.01)

Patent

CA 2612562

A method of forming a cannula from a cannula mandrel assembly comprising a pair of mouthpiece/nasal mandrels and a mating facepiece mandrel. The facepiece mandrel has a pair of conical holes, in an intermediate section thereof, for receiving a leading end of one mouthpiece/nasal mandrel. The conical holes allow the facepiece mandrel to slide along the mouthpiece/nasal mandrels until the conical holes abut with respective mating tapering conical sections and prevent further sliding movement along the mouthpiece/nasal mandrels. Following assembly, the assembly is heated, at least one coating of a polymeric material is applied thereto and heat from the assembly at least partially cures the polymeric material on the assembly. Following curing, the facepiece mandrel and formed cannula are slide along the mouthpiece/nasal mandrels until the facepiece mandrel and formed cannula are removed therefrom. Lastly, the facepiece mandrel is removed from the formed cannula.

L'invention se rapporte à un procédé de réalisation d'une canule à partir d'un ensemble canule mandrin comprenant deux mandrins formant un embout buccal/nasal et un mandrin correspondant de pièce faciale. Le mandrin formant pièce faciale possède deux orifices coniques situés dans une section intermédiaire dudit mandrin et conçus pour recevoir une extrémité avant du mandrin à embout buccal ou du mandrin nasal. Les orifices coniques permettent au mandrin formant pièce faciale de coulisser le long des mandrins à embout buccal/nasal de sorte que les orifices coniques reçoivent les sections coniques effilées respectives correspondantes et empêchent un mouvement de coulissement supplémentaire le long des mandrins à embout buccal/nasal. Une fois assemblé, l'ensemble est chauffé, au moins un revêtement de matériau polymère est appliqué audit ensemble et la chaleur provenant de l'ensemble durcit au moins partiellement le matériau polymère sur l'ensemble. Une fois durci, le mandrin formant pièce faciale et la canule formée coulissent le long des mandrins à embout buccal/nasal jusqu'au retrait du mandrin formant pièce faciale et de la canule formée dudit ensemble. Finalement, le mandrin formant pièce faciale est retiré de la canule ainsi formée.

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