Apparatus and method for tissue resection

A - Human Necessities – 61 – B

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A61B 18/14 (2006.01) A61B 19/00 (2006.01)

Patent

CA 2495791

A tissue ablation system is described that generates a uniform avascular plane of coagulated tissue to aid in the bloodless or near-bloodless resection of various biological tissues from a variety of organs. The tissue ablation system includes an energy director guide and two or more sets of bipolar energy directors. The energy director guide includes a series of channels that configure the energy directors to provide approximately uniform power distribution or current density through a target tissue volume or plane causing the tissue volume to become hemostatic. The spacing among the channels of the energy director guide varies according to the total number of energy directors received in the energy director guide so that relative spacing among the center-most channels is largest and relative spacing among the end-most channels is smallest. The energy director guide secures a selected position of each of the energy directors in the target tissue volume.

L'invention concerne un système d'ablation tissulaire permettant de générer un plan de tissu coagulé avasculaire et uniforme afin de faciliter la résection de divers tissus biologiques sans hémorragie ou presque à partir d'une variété d'organes. Ledit système d'ablation tissulaire comprend un dispositif de guidage d'énergie et deux ensembles ou plus de dispositifs d'orientation d'énergie bipolaire. Le dispositif de guidage d'énergie comprend une série de canaux configurant les dispositifs d'orientation d'énergie afin de fournir une répartition d'énergie ou une densité de courant approximativement uniforme à travers un volume ou un plan tissulaire cible, ce qui entraîne l'hémostase dudit volume tissulaire. L'espacement entre les canaux du dispositif de guidage d'énergie varie en fonction du nombre total de dispositifs d'orientation d'énergie reçus dans ledit dispositif de guidage d'énergie, de sorte que l'espacement relatif entre les canaux les plus centraux est plus grand et l'espacement relatif entre les canaux les éloignés est plus petit. Le dispositif de guidage d'énergie fixe la position sélectionnée de chacun des dispositifs d'orientation d'énergie dans le volume tissulaire cible.

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