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    Tissue heating and ablation systems and methods using porous electrode structures with electrically conductive surfaces
    37.
    发明授权
    Tissue heating and ablation systems and methods using porous electrode structures with electrically conductive surfaces 失效
    使用具有导电表面的多孔电极结构的组织加热和消融系统和方法

    公开(公告)号：US5797903A

    公开(公告)日：1998-08-25

    申请号：US631252

    申请日：1996-04-12

    申请人： David K. Swanson ,  Dorin Panescu ,  James G. Whayne ,  Patrick M. Owens ,  Russell B. Thompson

    发明人： David K. Swanson ,  Dorin Panescu ,  James G. Whayne ,  Patrick M. Owens ,  Russell B. Thompson

    IPC分类号： A61L29/08 ,  A61B17/39

    CPC分类号： A61L29/085 ,  A61B2018/00267 ,  A61B2018/00839

    摘要： Tissue heating and ablation systems and methods use a porous electrode assembly with an electrically conductive surface. The electrode assembly includes an exterior peripherally surrounding an interior area. At least a portion of the wall comprises an electrically conductive material. A lumen conveys a medium containing ions into the interior area. According to the invention, at least a portion of the wall also comprising a porous material sized to pass ions contained in the medium. In a preferred embodiment, the electrode assembly further includes an element coupling the electrically conductive material to a source of electrical energy to transmit electrical energy. In this preferred embodiment, the electrically conductive material is also porous to pass ions contained in the medium. The assembly also preferably includes a conductive element coupling the medium within the interior area to a source of electrical energy to enable ionic transport of electrical energy by the medium through the porous material.

    摘要翻译： 组织加热和消融系统和方法使用具有导电表面的多孔电极组件。 电极组件包括外围围绕内部区域的外部。 壁的至少一部分包括导电材料。 内腔将含有离子的介质输送到内部区域。 根据本发明，壁的至少一部分还包括多孔材料，其尺寸适于通过包含在介质中的离子。 在优选实施例中，电极组件还包括将导电材料耦合到电能源以传输电能的元件。 在该优选实施例中，导电材料也是多孔的以通过包含在介质中的离子。 组件还优选地包括将内部区域内的介质耦合到电能源的导电元件，以使介质能够通过多孔材料离子传输电能。

    Tissue heating and ablation systems and methods using porous electrode structures with specified electrical resistivities
    38.
    发明授权
    Tissue heating and ablation systems and methods using porous electrode structures with specified electrical resistivities 失效
    组织加热和消融系统和使用具有规定电阻率的多孔电极结构的方法

    公开(公告)号：US6071278A

    公开(公告)日：2000-06-06

    申请号：US631074

    申请日：1996-04-12

    申请人： Dorin Panescu ,  David K. Swanson ,  James G. Whayne ,  Patrick M. Owens ,  Russell B. Thompson

    发明人： Dorin Panescu ,  David K. Swanson ,  James G. Whayne ,  Patrick M. Owens ,  Russell B. Thompson

    IPC分类号： A61B18/14 ,  A61B17/39

    CPC分类号： A61B18/1492 ,  A61B2018/00148 ,  A61B2018/00214

    摘要： Systems and methods for heating or ablating tissue use a porous electrode. The porous electrode comprises a wall having an interior area that contains an electrically conductive element. At least a portion of the wall comprises a porous material sized to block passage of blood cells while passing ions. The systems and methods position the porous electrode in contact with tissue. The systems and methods couple the electrically conductive element to a source of electrical energy. The systems and methods convey a fluid medium containing ions into the interior area to enable ionic transfer of electrical energy from the electrical conducting element through the fluid medium and porous material to ablate tissue. The systems and methods also specify differing electrical resistivities for the porous material based, at least in part, upon achieving differing desired tissue heating or ablation effects.

    摘要翻译： 用于加热或消融组织的系统和方法使用多孔电极。 多孔电极包括具有包含导电元件的内部区域的壁。 壁的至少一部分包括多孔材料，其尺寸设置成在通过离子时阻止血细胞通过。 系统和方法使多孔电极与组织接触。 系统和方法将导电元件耦合到电能源。 系统和方法将含有离子的流体介质传送到内部区域，以使电能从导电元件通过流体介质和多孔材料离子转移以烧蚀组织。 该系统和方法至少部分地基于实现不同的期望的组织加热或消融效果，为多孔材料指定不同的电阻率。