Electrosurgical device for harvesting a vessel especially...

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/32 (2006.01) A61B 18/14 (2006.01) A61B 17/00 (2006.01) A61B 17/02 (2006.01) A61B 17/28 (2006.01)

Patent

CA 2225428

Devices and methods for minimally invasive harvesting of a vessel, especially the internal mammary artery for coronary artery bypass grafting, are disclosed. Generally, an electrosurgical instrument is provided which has a scissors mechanism or other end effector for dissecting tissue. The instrument also has monopolar or bipolar capabilities. Bipolar blade configurations provide current flow between blades or within each blade of the scissors mechanism or both. The instrument includes at least one ergonomically positioned actuator for actuating movement of the blades or end effectors for cutting tissue, for actuating current flow f cauterizing tissue, or for simultaneously or sequentially actuating movement and current flow. In one embodiment, the actuator is operable by a fingertip. The instrument also has a shaft which extends between the scissor mechanism and a handle portion which may be selectively rotatable or malleable to optimize orientation of the scissor mechanism.

L'invention porte sur des dispositifs et des méthodes pour prélever avec effraction minimale un vaisseau, plus particulièrement l'artère thoracique interne, pour un pontage aortocoronarien par greffe. Généralement, un instrument d'électrochirurgie comportant un mécanisme à ciseaux ou un autre organe préhenseur est prévu pour disséquer les tissus. L'instrument a également des capacités monopolaires ou bipolaires. Les configurations bipolaires des lames fournissent un flux de courant entre les lames, dans chaque lame du mécanisme à ciseaux ou les deux. L'instrument comprend au moins un actionneur placé de façon ergonomique pour enclencher le mouvement des lames ou des organes préhenseurs afin de couper les tissus, pour entraîner le flux de courant afin de cautériser les tissus, ou pour enclencher le mouvement et entraîner le flux de courant simultanément ou séquentiellement. Dans un modèle, l'actionneur est déclenché du bout du doigt. L'instrument comporte également une tige se prolongeant entre le mécanisme à ciseaux et une poignée qui peut être rotative ou malléable afin d'optimiser l'orientation du mécanisme à ciseaux.

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