Self-sealing cannula

Details Self-sealing cannula Self-sealing cannula

A - Human Necessities

61

B

A61B 17/34 (2006.01) A61B 19/00 (2006.01) A61M 13/00 (2006.01) A61M 25/00 (2006.01) A61M 39/06 (2006.01)

Patent

CA 2504540

A cannula assembly (10) for performing a surgical includes a cannula defining a longitudinal axis (a) and having a longitudinal passageway (29) extending therethrough, a seal for substantially sealing the longitudinal passageway within the cannula in the absence of an object being received through the passageway and an elongated membrane (30) disposed within the longitudinal passageway of the cannula. The elongated membrane is secured to the cannula at respective ends of the elongated membrane to define an annular space (38) between the elongated membrane and the cannula. The cannula has a throughhole (42) in communication with the annular space whereby, when the cannula is positioned within an insufflated body cavity, insufflation gases pass through the throughhole to expand the annular space to thereby cause the elongated membrane to form a seal about an object inserted therethrough.

L'invention concerne un ensemble canule (10) conçu pour réaliser une intervention chirurgicale. Cet ensemble canule comprend une canule qui définit un axe longitudinal (a) et qui comprend un passage longitudinal (29) s'étendant dans la canule, un scellement qui permet de sceller sensiblement le passage longitudinal dans la canule en l'absence d'un objet introduit par le passage et une membrane allongée (30) disposée dans le passage longitudinal de la canule. La membrane allongée est fixée par ses extrémités respectives sur la canule afin de définir un espace annulaire (38) entre la membrane allongée et la canule. Cette canule comprend un trou traversant (42) qui communique avec l'espace annulaire. Ainsi, lorsque la canule est placée dans une cavité corporelle dans laquelle des gaz ont été insufflés, les gaz d'insufflation passent à travers le trou traversant afin de dilater l'espace annulaire et la membrane allongée forme un scellement autour d'un objet introduit par la membrane.

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