An electrosurgical instrument

A - Human Necessities – 61 – B

Patent

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A61B 18/04 (2006.01) A61B 18/14 (2006.01)

Patent

CA 2297081

An electrosurgical instrument is provided for the treatment of tissue in the presence of an electrically-conductive fluid medium. The instrument comprises an instrument shaft (10), a tissue treatment electrode (12) at the distal end of the shaft for electrosurgically excising tissue pieces at an operation site, morcellation means for electrosurgically reducing the size of excised tissue pieces, and removal means for removing morcellated tissue pieces. The instrument has an apertured portion (20a) through which matter can be aspirated by the removal means from the region surrounding the tissue treatment electrode (12). The removal means comprises a channel formed within the instrument shaft (10) and leading from the apertured portion (20a). The tissue treatment electrode (12) is movable cyclically relative to the distal end of the shaft (10), and constitutes the morcellation means.

L'invention concerne un instrument électrochirurgical servant à traiter les tissu en présence d'un fluide électriquement conducteur. L'instrument comprend une tige (10), une électrode (12) de traitement tissulaire placée à l'extrémité distale de la tige pour permettre l'excision électrochirurgicale de portions de tissu dans le site opératoire, des moyens de fragmentation permettant de réduire la dimension des morceaux de tissu excisés, et de moyens d'évacuation permettant de retirer les morceaux de tissu fragmentés. L'instrument présente une partie (20a) perforée à travers laquelle les matières peuvent être aspirées par les moyens d'évacuation afin d'être évacuées de la région entourant l'électrode (12) de traitement tissulaire. Les moyens d'évacuation comprennent un canal formé à l'intérieur de la tige (10), dans le prolongement de la partie (20a) perforée. L'électrode (12) de traitement tissulaire présente une mobilité cyclique relativement à l'extrémité distale de la tige (10), et forme les moyens de fragmentation.

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