Under water treatment

A - Human Necessities – 61 – B

Patent

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Details

A61B 18/14 (2006.01) A61M 1/00 (2006.01)

Patent

CA 2255881

An electrosurgical instument, which is used for the treatment of tissue in the presence of an electrically-conductive fluid medium, comprises an instrument shaft (10), and an electrode assembly (12) at one end of the shaft. The electrode assembly (12) comprises a tissue treatment electrode (14) and a return electrode (18) which is electrically insulated from the tissue treatment electrode by means of an insulation member (16). The tissue treatment electrode (14) has an exposed end for treating tissue, and the return electrode (18) has a fluid contact surface which is spaced from the tissue treatment electrode in such a manner as to define, in use, a conductive fluid path that completes an electrical circuit between the tissue treatment electrode and the return electrode. The electrode assembly (12) is provided with a plurality of apertures (14a) in the region of the tissue treatment electrode (14), through which apertures vapour bubbles and/or particulate material can be aspirated from the region surrounding the tissue treatment electrode.

Instrument électrochirurgical qui est utilisé pour le traitement de tissus en présence d'un liquide conducteur. Il comporte un axe (10) et un ensemble électrode à l'une des extrémités de l'axe. L'ensemble électrode (12) est composé d'une électrode de traitement des tissus (14) et d'une électrode de retour (18) qui est isolée électriquement de l'électrode de traitement des tissus au moyen d'un membre isolant (16). L'électrode de traitement des tissus (14) a une extrémité qui est exposée pour traiter les tissus et l'électrode de retour (18) a une surface de contact avec le liquide qui est espacée de l'électrode de traitement des tissus de manière à définir, pendant l'usage, un trajet conducteur qui complète un circuit électrique entre l'électrode de traitement des tissus et l'électrode de retour. L'ensemble électrode (12) est pourvu de plusieurs ouvertures (14a) dans la région de l'électrode de traitement des tissus (14) à travers lesquelles les vapeurs, les bulles et/ou les particules peuvent être aspirées de la région entourant l'électrode de traitement des tissus.

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