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    Ablation catheter with thermally mediated catheter body for mitigating blood coagulation and creating larger lesion
    2.
    发明授权
    Ablation catheter with thermally mediated catheter body for mitigating blood coagulation and creating larger lesion 有权
    消融导管与热介导的导管体减轻血液凝固和创造更大的病变

    公开(公告)号：US08449537B2

    公开(公告)日：2013-05-28

    申请号：US11618692

    申请日：2006-12-29

    申请人： Hong Cao ,  Xiaoping Guo ,  Isaac Shai ,  Michael Yang ,  Kedar Ravindra Belhe ,  Saurav Paul ,  Chou Thao

    发明人： Hong Cao ,  Xiaoping Guo ,  Isaac Shai ,  Michael Yang ,  Kedar Ravindra Belhe ,  Saurav Paul ,  Chou Thao

    IPC分类号： A61B18/18

    CPC分类号： A61B18/1492 ,  A61B2018/00005 ,  A61B2018/00357

    摘要： An ablation catheter is provided for ablating internal tissue of a patient. The catheter includes a distal end that is adapted to be inserted into a body cavity relative to a desired location therein (e.g., within the heart). An ablation electrode is connected relative to the distal end of the catheter for providing ablation energy to patient tissue. A heat sink is provided that is in thermal contact with the ablation electrode. The heat sink, in addition to being in thermal contact with the ablation electrode, is electrically isolated from the ablation electrode. This allows the heat sink to conduct heat away from the ablation electrode without dissipating electrical energy from the electrode. In this regard, the heat sink may prevent build-up of excess heat within the electrode that may result in blood coagulation and/or tissue charring.

    摘要翻译： 提供消融导管以消融患者的内部组织。 该导管包括适于相对于其中的期望位置（例如，在心脏内）插入体腔内的远端。 消融电极相对于导管的远端连接，以向患者组织提供消融能量。 提供与消融电极热接触的散热器。 除了与消融电极热接触之外，散热器与消融电极电隔离。 这允许散热器将热量从消融电极导出，而不会从电极中消耗电能。 在这方面，散热器可以防止在电极内积聚多余的热量，从而导致血液凝固和/或组织烧焦。

    Spring-tip, flexible electrode catheter for tissue ablation
    3.
    发明授权
    Spring-tip, flexible electrode catheter for tissue ablation 有权
    弹簧尖端，柔性电极导管用于组织消融

    公开(公告)号：US07311704B2

    公开(公告)日：2007-12-25

    申请号：US10856904

    申请日：2004-05-27

    申请人： Saurav Paul ,  Kedar Ravindra Belhe ,  Hong Cao ,  John Avi Roop ,  Chou Thao

    发明人： Saurav Paul ,  Kedar Ravindra Belhe ,  Hong Cao ,  John Avi Roop ,  Chou Thao

    IPC分类号： A61B18/18

    CPC分类号： A61B18/1492 ,  A61B2018/143 ,  A61B2018/1435

    摘要： A spring-tip, flexible electrode, and a method for using that electrode for tissue ablation, are disclosed. The spring-tip, flexible electrode comprises an enshrouded flexible electrode (e.g., an enshrouded plurality of flexible brush filaments or bristles) for applying ablative energy (e.g., RF energy) to target tissue during the formation of spot or continuous linear lesions. The spring of the spring tip may comprise compressible coils, compressible mesh, or compressible bellows, among other things. The spring provides axial suspension and is capable of axial compression and extension, and is flexible enough for deflection and bending. The axial suspension of the spring tip facilitates the desired contact between the electrode and the tissue surface. A shielded, spring-tip, flexible electrode is also disclosed, and includes a flexible nipple or shield. The spring-tip, flexible electrode facilitates enhanced tissue contact in difficult environments (e.g., during ablation of a contoured or trabeculated surface inside a beating heart) since the flexible electrode readily conforms to surface contours while the bending stress of the spring enhances the contract pressure on the tissue.

    摘要翻译： 公开了一种弹簧尖端，柔性电极和用于组织消融使用该电极的方法。 弹簧尖端的柔性电极包括用于在形成斑点或连续的线性损伤期间向目标组织施加消融能量（例如，RF能量）的带有屏蔽的柔性电极（例如，被包围的多个柔性刷丝或刷毛）。 弹簧尖端的弹簧可以包括可压缩线圈，可压缩网或可压缩波纹管等等。 弹簧提供轴向悬挂并且能够轴向压缩和伸展，并且具有足够的挠性和弯曲性。 弹簧顶端的轴向悬挂有助于电极和组织表面之间的所需接触。 还公开了屏蔽的弹簧尖端柔性电极，并且包括柔性接头或屏蔽。 弹簧尖端的柔性电极有助于在困难的环境中（例如在跳动心脏内的轮廓或小梁表面的消融期间）增强组织接触，因为柔性电极容易符合表面轮廓，同时弹簧的弯曲应力增加了收缩压力 在纸巾上。

    ASSESSMENT OF ELECTRODE COUPLING FOR TISSUE ABLATION
    4.
    发明申请
    ASSESSMENT OF ELECTRODE COUPLING FOR TISSUE ABLATION 有权
    电器联合电击组织评估

    公开(公告)号：US20120323237A1

    公开(公告)日：2012-12-20

    申请号：US13593676

    申请日：2012-08-24

    申请人： Saurav Paul ,  Hong Cao ,  Kedar Ravindra Belhe ,  Chou Thao

    发明人： Saurav Paul ,  Hong Cao ,  Kedar Ravindra Belhe ,  Chou Thao

    IPC分类号： A61B18/14

    CPC分类号： A61B18/1206 ,  A61B5/0538 ,  A61B18/1492 ,  A61B2018/00357 ,  A61B2018/00577 ,  A61B2018/00732 ,  A61B2018/00869 ,  A61B2018/00875 ,  A61B2018/124 ,  A61B2018/128

    摘要： An electrode catheter and a method for assessing electrode-tissue contact and coupling are disclosed. An exemplary electrode catheter comprises an electrode adapted to apply electrical energy. A measurement circuit is adapted to measure impedance between the electrode and ground as the electrode approaches a target tissue. A processor determines a contact and coupling condition for the target tissue based at least in part on reactance of the impedance measured by the measurement circuit. In another exemplary embodiment, the electrode catheter determines the contact and coupling condition based at least in part on a phase angle of the impedance.

    摘要翻译： 公开了电极导管和用于评估电极组织接触和耦合的方法。 示例性电极导管包括适于施加电能的电极。 测量电路适于在电极接近目标组织时测量电极和地面之间的阻抗。 处理器至少部分地基于由测量电路测量的阻抗的电抗来确定目标组织的接触和耦合条件。 在另一示例性实施例中，电极导管至少部分地基于阻抗的相位角确定接触和耦合条件。

    Contact-sensitive pressure-sensitive conductive composite electrode and method for ablation
    6.
    发明授权
    Contact-sensitive pressure-sensitive conductive composite electrode and method for ablation 有权
    接触敏感的压敏导电复合电极及其消融方法

    公开(公告)号：US07883508B2

    公开(公告)日：2011-02-08

    申请号：US11647294

    申请日：2006-12-29

    申请人： Chou Thao ,  Saurav Paul ,  Kedar Ravindra Belhe ,  Hong Cao

    发明人： Chou Thao ,  Saurav Paul ,  Kedar Ravindra Belhe ,  Hong Cao

    IPC分类号： A61B18/18

    CPC分类号： A61B18/1492 ,  A61B2018/00577 ,  A61B2018/00702 ,  A61B2090/064

    摘要： A catheter assembly for pressure-sensitive control of ablation treatment is disclosed. The assembly includes a conductive element, an electrode, and a pressure sensitive conductive composite member positioned between the conductive element and the electrode. At least one of the conductive pin, the pressure sensitive conductive composite element and the ablation electrode are moveable to create an engagement position and a non-engagement position. In the engagement position, the elements are electrically coupled such that ablation energy may be delivered from the conductive pin to the ablation electrode via the pressure sensitive conductive composite element. In the non-engagement position, the elements are electrically decoupled such that ablation energy is not delivered to the ablation electrode. A related method for pressure-sensitive control of ablation is also disclosed.

    摘要翻译： 公开了一种用于消融治疗的压敏控制的导管组件。 组件包括导电元件，电极和位于导电元件和电极之间的压敏导电复合元件。 导电针，压敏导电复合元件和消融电极中的至少一个可移动以产生接合位置和非接合位置。 在接合位置，元件被电耦合，使得消融能量可以经由压敏导电复合元件从导电引脚传送到消融电极。 在非接合位置，元件被电去耦合，使得消融能量不被输送到消融电极。 还公开了一种用于消融的压敏控制的相关方法。

    Brush electrode and method for ablation
    7.
    发明授权
    Brush electrode and method for ablation 有权

    公开(公告)号：US07326204B2

    公开(公告)日：2008-02-05

    申请号：US10808919

    申请日：2004-03-24

    申请人： Saurav Paul ,  Kedar Ravindra Belhe ,  Hong Cao ,  Chou Thao

    发明人： Saurav Paul ,  Kedar Ravindra Belhe ,  Hong Cao ,  Chou Thao

    IPC分类号： A61B18/18

    CPC分类号： A61B18/1402 ,  A61B2018/143 ,  A61B2018/1472

    摘要： A brush electrode and a method for using the brush electrode for tissue ablation are disclosed. The brush electrode comprises a plurality of flexible filaments or bristles for applying ablative energy (e.g., RF energy) to target tissue during the formation of spot or continuous linear lesions. Interstitial spaces are defined among the filaments of the brush electrode, and the interstitial spaces are adapted to direct conductive or nonconductive fluid, when present, toward the distal ends of the brush filaments. The brush electrode facilitates electrode-tissue contact in target tissue having flat or contoured surfaces. The flexible filaments may be selectively trimmed to give a desired tip configuration or a desired standoff distance between the tissue and the conductive filaments in the brush electrode. Also, the filaments may be grouped into clusters. A shielded-tip brush electrode, including a flexible boot, is also disclosed.

    FABRIC ELECTRODE HEAD
    10.
    发明申请
    FABRIC ELECTRODE HEAD 审中-公开
    织物电极头

    公开(公告)号：US20080161893A1

    公开(公告)日：2008-07-03

    申请号：US11618557

    申请日：2006-12-29

    申请人： Saurav Paul ,  Chou Thao ,  Hong Cao ,  Kedar Ravindra Belhe

    发明人： Saurav Paul ,  Chou Thao ,  Hong Cao ,  Kedar Ravindra Belhe

    IPC分类号： A61N1/05

    CPC分类号： A61B18/14 ,  A61B18/16 ,  A61B2018/00577 ,  A61N1/0464 ,  A61N1/05

    摘要： An electrode head is disclosed that utilizes electrically conductive or dissipative fabric to exchange electrical energy with tissue. This electrode head may be used for any appropriate application, such as a catheter electrode, a return electrode, or the like. Any appropriate function may be provided by this electrode head, such as tissue ablation, tissue mapping, or providing an electrical ground.

    摘要翻译： 公开了一种使用导电或耗散织物以与组织交换电能的电极头。 该电极头可用于任何适当的应用，例如导管电极，返回电极等。 可以通过该电极头提供任何适当的功能，例如组织消融，组织贴图或提供电接地。