Arthroscopic cannula with fluid seals

Details Arthroscopic cannula with fluid seals Arthroscopic cannula with fluid seals

A - Human Necessities

61

M

A61M 25/01 (2006.01) A61B 17/34 (2006.01)

Patent

CA 2239143

An elongated arthroscopic cannula having proximal and distal elastomeric sealing means through which elongated surgical instruments may be inserted. The cannula seals maintain their effectiveness with and without instruments present within the cannula. The distal sealing means is a transverse linear slit supported around its perimeter by a racetrack-shaped reinforcing member to engage instruments inserted therethrough and to seal the proximal side of the linear slit from the distal side when no instrument is used. The proximal sealing means is a floating, circular aperture capable of being laterally moved and tilted in order to provide a sealing function around an instrument shaft whether or not the shaft is aligned with the axis of the cannula.

Il s'agit d'une canule arthroscopique allongée dotée de mécanismes de scellement élastomérique proximal et distal, à travers laquelle des instruments chirurgicaux allongés peuvent être insérés. Les mécanismes de scellement de la canule conservent leur efficacité peu importe si des instruments sont présents ou non dans la canule. Le mécanisme de scellement distal consiste en une fente linéaire transversale supportée, autour de son périmètre, par un élément de renforcement en forme de champ de courses servant à engager les instruments qui y sont insérés et à sceller le côté proximal de la fente linéaire à partir du côté distal lorsqu'aucun instrument n'est utilisé. Le mécanisme de scellement proximal est une ouverture circulaire flottante pouvant être déplacée latéralement et penchée de façon à assurer le scellement autour de la tige d'un instrument, peu importe si la tige se trouve dans l'axe de la canule.

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