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    Systems and methods to control tissue heating or ablation with porous electrode structures
    5.
    发明授权
    Systems and methods to control tissue heating or ablation with porous electrode structures 失效
    用多孔电极结构控制组织加热或消融的系统和方法

    公开(公告)号：US5868736A

    公开(公告)日：1999-02-09

    申请号：US644605

    申请日：1996-04-12

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

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

    IPC分类号： A61B18/14 ,  A61B17/39

    CPC分类号： A61B18/1492 ,  A61B2018/00267 ,  A61B2018/00839

    摘要： Systems and methods for heating or ablating body tissue place in contact with tissue an electrode, which includes an exterior wall peripherally surrounding an interior area. A lumen conveys a medium containing ions into the interior area. At least a portion of the exterior wall of the electrode comprises a porous material sized to pass ions contained in the medium. The systems and methods transmit electrical ablation energy to the medium for ionic transport through the porous material to tissue. The systems and methods sense temperature proximal to where the electrode contacts tissue. The systems and methods control transmission of electrical ablation energy to the medium based, at least in part, upon the temperature sensed.

    摘要翻译： 用于加热或消融身体组织的系统和方法与组织接触，电极包括外围围绕内部区域的外壁。 内腔将含有离子的介质输送到内部区域。 电极的外壁的至少一部分包括多孔材料，其尺寸适于通过包含在介质中的离子。 系统和方法将电消融能量传递到介质，用于通过多孔材料离子传输到组织。 系统和方法感测靠近电极接触组织的温度。 系统和方法至少部分地基于感测的温度来控制电消融能量传播到介质。

    Tissue heating and ablation systems and methods using porous electrode structures with electrically conductive surfaces
    6.
    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
    7.
    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。

    Electrode structures formed from flexible, porous, or woven materials
    9.
    发明授权
    Electrode structures formed from flexible, porous, or woven materials 失效
    由柔性，多孔或编织材料形成的电极结构

    公开(公告)号：US5879348A

    公开(公告)日：1999-03-09

    申请号：US631577

    申请日：1996-04-12

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

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

    IPC分类号： A61B18/14 ,  A61N1/06 ,  A61B17/39

    CPC分类号： A61N1/06 ,  A61B18/1492 ,  A61B2018/00065 ,  A61B2018/00113 ,  A61B2018/00214 ,  A61B2018/00267 ,  A61B2018/00839 ,  A61B2018/1253 ,  A61B2018/1472 ,  A61B2218/002

    摘要： Electrode structures are formed from flexible, porous, or woven materials. One such structure is made by forming first and second body sections, each including a peripheral edge. The first and second body sections are joined together about their peripheral edges with a seam, thereby forming a composite structure. Another one of such structures is made by forming a body having a three dimensional shape and opposite open ends, and at least partially closing at least one of the opposite ends by forming a seam. Another one of such structures is formed from a sheet of material having peripheral edges. The sheet is placed on the distal end of a fixture, while the peripheral edges of the sheet are gathered about the proximal end of a fixture, thereby imparting to the sheet a desired shape. At least one pleat is formed to secure the gathered peripheral edges together. The seams or pleats are formed by thermal bonding, or ultrasonic welding, or laser welding, or adhesive bonding, or sewing.

    摘要翻译： 电极结构由柔性，多孔或编织材料形成。 一个这样的结构通过形成第一和第二主体部分而形成，每个主体部分包括周边边缘。 第一和第二主体部分通过接缝围绕其周边边缘连接在一起，从而形成复合结构。 通过形成具有三维形状和相对的开口端的主体，并且通过形成接缝至少部分地闭合相对端中的至少一个来制造另一个这样的结构。 这种结构中的另一个由具有外围边缘的材料片形成。 片材被放置在固定装置的远端，而片材的周边边缘围绕固定装置的近端聚集，从而赋予片材所需的形状。 形成至少一个褶皱以将聚集的周边边缘固定在一起。 接缝或褶皱是通过热粘合或超声波焊接，或激光焊接，粘合或粘合形成的。