Cluster ablation electrode system

A - Human Necessities – 61 – B

Patent

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A61B 18/14 (2006.01)

Patent

CA 2297846

A multiplicity of high frequency electrodes in a cluster configuration may be inserted into tissue of a patient's body for producing heat ablation of abnormal tissue such as a tumor. The electrodes are connected coherently to the voltage output of a high frequency generator. An enlarged ablation volume is accomplished by the electrode cluster with reduced risk of hemorrhage because of the smaller diameter of the individual electrodes of the cluster. The electrodes terminate in conductive tips, which are cooled by a fluid coolant to further facilitate enlarged ablation volumes. Very large ablation volumes are accomplished by this process and apparatus. Various cluster electrode configurations may be adapted to meet specific clinical requirements.

L'invention a pour objet des électrodes multiples haute fréquence, réunies en un groupe que l'on peut insérer dans un tissu corporel d'un patient pour réaliser l'ablation thermique d'un tissu anormal tel qu'une tumeur. Les électrodes sont connectées de manière cohérente à une tension de sortie d'un générateur haute fréquence. La disposition des électrodes en groupe permet d'atteindre un volume d'ablation plus important; les risques d'hémorragie diminuent grâce à un diamètre plus petit des électrodes individuelles faisant partie du groupe. Les électrodes se terminent par des pointes conductrices refroidies avec un fluide de refroidissement, ce qui facilite davantage la création de volumes d'ablation importants. L'appareil et le procédé faisant l'objet de cette invention permettent de créer des volumes d'ablation très importants. On a prévu de différentes configurations de groupes d'électrodes pour répondre à des exigences cliniques spécifiques.

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