Irrigated ablation device assembly

A - Human Necessities – 61 – B

Patent

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Details

A61B 18/04 (2006.01) A61B 17/94 (2006.01) A61B 18/12 (2006.01) A61B 18/14 (2006.01) A61M 25/00 (2006.01)

Patent

CA 2331836

A tissue ablation device assembly (10) ablates a region of tissue of a body space wall of a patient. In a tissue ablation device asembly (20), an ablation member (12) is disposed on the distal end portion (20) of an elongated body (16). The ablation member (12) includes an ablation element and at least one conductor coupled to the ablation element. A porous membrane covers the ablation element and defines an inner space between the ablation element and an inner surface of the porous membrane. A pressurizable fluid passageway extends between a fluid port on the proximal end portion of the elongated body and the inner space within the porous membrane. Fluid can pass from the fluidport, through the pressurizable fluid passageway, to the inner space. The porous membrane allows a volume of pressurized fluid to pass through the porous membrane to an exterior of the ablation member so as to irrigate the ablation element.

L'invention concerne un ensemble (10) d'ablation de tissus permettant l'ablation d'une zone tissulaire d'une paroi d'espace corporel chez un patient. Dans cet ensemble (10) d'ablation de tissus, un élément (12) d'ablation est disposé au niveau de l'extrémité (20) distale d'un corps allongé (16). L'élément (12) d'ablation comprend un élément d'ablation et au moins un conducteur couplé à l'élément d'ablation. Une membrane poreuse recouvre l'élément d'ablation et définit un espace intérieur entre l'élément d'ablation et une surface intérieure de la membrane poreuse. Un passage pour fluides pouvant être mis sous pression s'étend entre un orifice pour fluide situé sur l'extrémité proximale du corps allongé et l'espace interne à l'intérieur de la membrane poreuse. Le fluide peut passer de l'orifice pour fluide à l'espace interne via le passage pour fluide pouvant être mis sous pression. La membrane poreuse permet à un certain volume sous pression de traverser la membrane poreuse vers l'extérieur de l'élément d'ablation de manière à irriguer l'élément d'ablation.

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