Catheter assemblies and inner cannulae

Details Catheter assemblies and inner cannulae Catheter assemblies and inner cannulae

A - Human Necessities

61

M

A61M 25/088 (2006.01) A61M 25/00 (2006.01) A61M 16/04 (2006.01)

Patent

CA 2220395

An inner cannula for a tracheotomy tube assembly are known where the inner cannula is formed from a tubular member. In the present invention, the tubular member has two parallel rows of slots formed along its length and covered by a sheath of thin flexible material on the inside of the tubular member, so that the slots can freely open and close on flexing. The two rows of slots are separated from one another by two longitudinal regions uninterrupted by slots, which give the cannula axial rigidity.

On connaît la canule interne pour tube de trachéotomie, où ladite canule est formée à partir d'un élément tubulaire. Dans la présente invention, l'élément tubulaire comporte deux rangs parallèles de fentes disposées sur toute sa longueur et recouvertes d'une enveloppe de fine matière flexible à l'intérieur de l'élément tubulaire, de telle façon que les fentes peuvent s'ouvrir et se fermer librement par flexion. Les deux rangées de fentes sont séparées l'une de l'autre par deux bandes longitudinales non coupées par des fentes, ce qui donne à la canule une rigidité axiale.

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