Circumferential ablation device assembly with dual...

A - Human Necessities – 61 – B

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A61B 18/14 (2006.01) A61M 25/10 (2006.01)

Patent

CA 2552165

Abstract of the Disclosure The present invention involves a surgical device and method of use, particularly an assembly and method incorporating dual expandable members along the distal region of an ablation device to facilitate ablation of a circumferential region of tissue engaged by the expandable member. The ablation device assembly includes an elongate body with a proximal end portion, a distal end portion, and a longitudinal axis. A first expansion element is located along the distal end portion of the elongate body, and is fluidly coupled to a first source of inflation fluid. A second expansion element having a circumferential wall is located along the distal end portion proximal the first expansion element, and is fluidly coupled to a second source of inflation fluid. An ablation element having an ablative energy source is located along the distal end portion within the second expansion element, wherein the ablation element cooperates with the second expansion element such that the ablative energy source emits a substantially circumferential pattern of energy through the circumferential wall.

L'invention concerne un dispositif chirurgical et un procédé d'utilisation, en particulier un ensemble et un procédé intégrant sur la région distale d'un dispositif d'ablation deux éléments expansibles qui facilitent l'ablation d'une région circonférentielle de tissu en contact avec l'élément expansible. L'ensemble dispositif d'ablation comprend un corps allongé présentant une partie d'extrémité proximale, une partie d'extrémité distale et un axe longitudinal. Un premier élément d'expansion, qui se situe sur la partie d'extrémité distale du corps allongé, est couplé de manière fluidique à une première source de fluide de gonflage. Un second élément d'expansion, qui comporte une paroi circonférentielle et se situe sur la partie d'extrémité distale proche du premier élément d'expansion, est couplé de manière fluidique à une seconde source de fluide de gonflage. Un élément d'ablation comportant une source d'énergie ablative est prévu sur la partie d'extrémité distale, à l'intérieur du second élément d'expansion ; cet élément d'ablation coopère avec le second élément d'expansion de sorte que la source d'énergie ablative produit un motif d'énergie sensiblement circonférentiel à travers la paroi circonférentielle.

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