Surgical instrument with internal irrigation

Details Surgical instrument with internal irrigation Surgical instrument with internal irrigation

A - Human Necessities

61

B

A61B 17/32 (2006.01) A61M 1/00 (2006.01)

Patent

CA 2721909

A surgical cutting instrument comprises an outer tubular member (18) and an inner tubular member (22). The outer tubular member includes a proximal section (40), an intermediate section (42), a distal section (44), and a side wall (60). The side wall defines a central lumen (46) extending from the proximal section to the distal section. The side wall also includes means for conducting fluid within a sidewall of the outer tubular member from the proximal section to the distal section and includes a distal opening positioned to direct fluid at the bur (24) and a treatment site. The inner tubular member (22) is rotatably received within the central lumen. A distal end of the inner tubular member forms a bur extending distally beyond, and exposed relative to, the distal section of the outer tubular member.

Cette invention concerne un instrument de coupe chirurgical comprenant un élément tubulaire extérieur (18) et un élément tubulaire intérieur (22). L'élément tubulaire extérieur comprend une section proximale (40), une section intermédiaire (42), une section distale (44) et une paroi latérale (60). La paroi latérale définit une lumière centrale (46) s'étendant depuis la section proximale jusqu'à la section distale. La paroi latérale comprend également un moyen pour conduire un fluide à l'intérieur d'une paroi latérale de l'élément tubulaire extérieur depuis la section proximale jusqu'à la section distale et comprend une ouverture distale positionnée de façon à diriger le fluide vers une fraise (24) et un site de traitement. L'élément tubulaire intérieur (22) est logé de manière rotative dans la lumière centrale. Une extrémité distale de l'élément tubulaire intérieur forme une fraise s'étendant distalement au-delà de la section distale de l'élément tubulaire extérieur, et est exposée par rapport à cette dernière.

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