Trocar assembly with pneumatic sealing

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/34 (2006.01)

Patent

CA 2662417

A trocar (800) for use in a minimally invasive surgical procedure includes an elongated body, nozzle means (835) and means for delivering a pressurized flow of fluid to the nozzle means. The elongated body has a generally tubular configuration with coaxially arranged inner (840) and outer (810) walls and longitudinally opposed proximal and distal end portions, with the inner wall (840) defining a lumen to accommodate passage of an instrument (490) therethrough. The nozzle means (835) is operatively associated with the inner wall (840) of the body for directing pressurized fluid into the lumen to develop a pressure differential in an area within a region extending from a location adjacent a distal end portion of the lumen to a location adjacent a proximal end portion of the lumen, to form a fluid seal around an instrument (490) passing therethrough.

La présente invention concerne un trocart (800) devant être utilisé dans un acte chirurgical minimalement invasif et qui comprend un corps allongé, des moyens de buse (835) et des moyens destinés à fournir un écoulement de fluide sous pression vers les moyens de buse. Le corps allongé présente une configuration généralement tubulaire avec des parois interne (840) et externe (810) disposées de manière coaxiale et des parties d'extrémité proximale et distale opposées longitudinalement, la paroi interne (840) définissant une lumière afin d'accueillir le passage d'un instrument (490) à travers celle-ci. Le moyen de buse (835) est associé de manière opérationnelle à la paroi interne (840) du corps pour diriger le fluide sous pression vers la lumière afin de créer un différentiel de pression dans une zone à l'intérieur d'une région s'étendant depuis un emplacement adjacent à une partie d'extrémité distale de la lumière vers un emplacement adjacent à une partie d'extrémité proximale de la lumière, afin de former un joint fluide autour d'un instrument (490) passant à travers.

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