Flexible inner tubular member and rotary tissue cutting...

Details Flexible inner tubular member and rotary tissue cutting... Flexible inner tubular member and rotary tissue cutting...

A - Human Necessities

61

B

A61B 17/32 (2006.01) A61B 17/16 (2006.01)

Patent

CA 2460339

A flexible inner tubular member (14) for being rotated in an outer tubular member (12) of a rotary tissue cutting instrument (10) includes an elongate inner tube (34) having a rotatably driveable proximal end, a distal end having a cutting member (36) exposed from the outer tubular member to cut anatomical tissue and a flexible region allowing the inner tubular member to rotate within the outer tubular member while conforming to the shape of the outer member. The flexible region is defined bya helical cut (39) in the inner tube (34) defining a plurality of integrally, unitarily connected tube segments (42) angularly movable relative to one another and a spiral wrap disposed over the helical cut.

L'invention concerne un élément tubulaire intérieur flexible (14) destiné à être tourné dans un élément tubulaire extérieur flexible (12) d'un instrument de découpe rotative de tissus (10). Cet élément tubulaire intérieur flexible (14) comprend un tube intérieur allongé (34) pourvu d'une extrémité proximale pouvant être actionnée par rotation, une extrémité distale pourvue d'un élément coupant (36) dépassant de l'élément tubulaire extérieur afin de découper le tissu anatomique et une région flexible qui permet à l'élément tubulaire intérieur de tourner dans l'élément tubulaire extérieur tout en épousant la forme de l'élément extérieur. La région flexible est définie par une entaille hélicoïdale (39) pratiquée sur le tube intérieur (34) définissant une pluralité de segments (42) de tube reliés les uns aux autres, pouvant effectuer un déplacement angulaire les uns par rapport aux autres, et un banderolage hélicoïdal appliqué à l'entaille hélicoïdale.

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