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187 条记录 (耗时 0.054 秒)

    Asymmetric multiple electrode support structures
    44.
    发明授权
    Asymmetric multiple electrode support structures 失效
    不对称多电极支撑结构

    公开(公告)号：US06216043B1

    公开(公告)日：2001-04-10

    申请号：US08742569

    申请日：1996-10-28

    申请人： David K. Swanson ,  James G. Whayne ,  Thomas F. Kordis ,  Dorin Panescu

    发明人： David K. Swanson ,  James G. Whayne ,  Thomas F. Kordis ,  Dorin Panescu

    IPC分类号： A61N100

    CPC分类号： A61B5/0422 ,  A61N1/056 ,  A61N1/0565 ,  A61N1/06 ,  A61N1/20 ,  A61N1/403

    摘要： Multiple electrode support structures have asymmetric geometries, either axially, or radially, or both. The asymmetric support structures are assembled from spline elements that extend between a distal hub and a proximal base. In one embodiment, the spline elements are circumferentially spaced about the distal hub in a radially asymmetric fashion, creating a greater density of spline elements in one region of the structure than in another region. In the same or another embodiment, the spline elements are preformed in an axially asymmetric fashion along their lengths, creating a different geometry in their distal regions than in their proximal regions.

    摘要翻译： 多个电极支撑结构具有轴向或径向或两者的不对称几何形状。 不对称支撑结构由在远端轮毂和近侧基座之间延伸的花键元件组装。 在一个实施例中，花键元件以径向不对称的方式围绕远侧轮毂周向间隔开，在结构的一个区域中产生比在另一个区域更大的花键元件密度。 在相同或另一个实施例中，花键元件沿它们的长度以轴向不对称的方式预成型，在它们的远侧区域中产生与其近端区域不同的几何形状。

    Systems and methods to control tissue heating or ablation with porous electrode structures
    46.
    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
    47.
    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。

    Systems and methods using a porous electrode for ablating and visualizing interior tissue regions
    48.
    发明授权
    Systems and methods using a porous electrode for ablating and visualizing interior tissue regions 失效
    使用多孔电极来消融和可视化内部组织区域的系统和方法

    公开(公告)号：US5722403A

    公开(公告)日：1998-03-03

    申请号：US739039

    申请日：1996-10-28

    申请人： David McGee ,  Dorin Panescu ,  David K. Swanson ,  James G. Whayne

    发明人： David McGee ,  Dorin Panescu ,  David K. Swanson ,  James G. Whayne

    IPC分类号： A61N1/05 ,  A61N1/40 ,  A61N1/44

    CPC分类号： A61N1/403 ,  A61N1/056 ,  A61N1/44 ,  A61B2018/00065

    摘要： A porous electrode assembly includes a wall having a surface capable of contacting tissue. The wall peripherally surrounds an interior area. The assembly also includes a lumen to convey a medium containing ions into the interior area, as well as an electrically conductive element, which couples the medium within the interior area to a source of electrical energy. At least a portion of the wall comprises a porous material, which is sized to pass ions contained in the medium, to thereby enable ionic transport of electrical energy through the porous material to tissue contacting the wall. An imaging element is located in the interior area, which is coupled to a source of visualizing energy for visualizing tissue. At least a portion of the wall is generally transparent to the visualizing energy.

    摘要翻译： 多孔电极组件包括具有能够接触组织的表面的壁。 墙壁围绕着一个内部区域。 组件还包括用于将含有离子的介质输送到内部区域的内腔以及将内部区域内的介质耦合到电能源的导电元件。 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，从而使电能通过多孔材料离子输送到接触壁的组织。 成像元件位于内部区域中，其连接到用于可视化组织的可视化能量源。 壁的至少一部分对于可视化能量通常是透明的。