Vessel sealer and divider

A - Human Necessities – 61 – B

Patent

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Details

A61B 18/14 (2006.01) A61B 17/295 (2006.01)

Patent

CA 2443298

An electrosurgical instrument for performing at least one of sealing and dividing tissue includes a housing having a shaft attached thereto, the shaft defining a longitudinal axis. The electrosurgical instrument also includes a first jaw member movable relative to a second jaw member, the first jaw member attached to the shaft and being relatively movable from a first open position wherein the jaw members are disposed in spaces relation relative to one another to a second closed position wherein the jaw members cooperate to grasp tissue therebetween. The instrument also includes a drive rod assembly for imparting movement of the jaw members between the first and second positions and a rotating assembly attached to the housing for rotating the jaw members about the longitudinal axis. A knife assembly is also attached to the housing for separating tissue grasped between the jaw members and a handle assembly is attached to the housing for actuating the drive rod assembly. The instrument also includes first and second electrical leads which connect the jaw members to a source of electrical energy such that the jaw members are capable of conducting energy through tissue held therebetween. A handswitch is attached to the housing to allow a user to selectively energize the jaw members.

La présente invention concerne un instrument électrochirurgical permettant au moins le suturage ou la résection de tissus. Il comporte un carter solidaire d'une tige définissant un axe longitudinal. Il comporte également une première mâchoire solidaire de la tige et mobile par rapport à une seconde mâchoire entre une position ouverte et une position fermée. En position fermée, les mâchoires sont écartées l'une de l'autre, et en position fermée, les mâchoires coopèrent entre elles de façon à saisir le tissu. L'instrument comporte également une tringlerie transmettant aux mâchoires le mouvement d'ouverture et fermeture, et un ensemble de rotation monté sur le carter de façon à entraîner la rotation des mâchoires autour de l'axe longitudinal. Un ensemble coupant est également monté sur le carter de façon à résectionner le tissu saisi entre les mâchoires, un ensemble à poignée étant monté sur le carter de façon à actionner la tringlerie. L'instrument comporte également deux conducteurs électriques qui relient les mâchoires à une source d'énergie électrique de façon que les mâchoires soient capables de conduire l'énergie au travers du tissu retenu entre elles. Un commutateur à main est monté sur le carter de façon à permettre à l'utilisateur de mettre les mâchoires sélectivement sous tension.

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