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97 条记录 (耗时 0.043 秒)

    Circumferential ablation device assembly
    35.
    发明授权
    Circumferential ablation device assembly 有权

    公开(公告)号：US06383151B1

    公开(公告)日：2002-05-07

    申请号：US09659477

    申请日：2000-09-11

    申请人： Chris J. Diederich ,  Michael D. Lesh ,  James C. Peacock, III ,  Michael R. Ross

    发明人： Chris J. Diederich ,  Michael D. Lesh ,  James C. Peacock, III ,  Michael R. Ross

    IPC分类号： A61B100

    CPC分类号： A61B18/1492 ,  A61B18/00 ,  A61B2017/00243 ,  A61B2018/00083 ,  A61B2018/00148 ,  A61B2018/00214 ,  A61M25/1002 ,  A61M2210/125 ,  A61N7/02 ,  A61N7/022

    摘要： This invention is a circumferential ablation device assembly which is adapted to forming a circumferential conduction block in a pulmonary vein. The assembly includes a circumferential ablation element which is adapted to ablate a circumferential region of tissue along a pulmonary vein wall which circumscribes the pulmonary vein lumen, thereby transecting the electrical conductivity of the pulmonary vein against conduction along its longitudinal axis and into the left atrium. The circumferential ablation element includes an expandable member with a working length that is adjustable from a radially collapsed position to a radially expanded position. An equatorial band circumscribes the outer surface of the working length and is adapted to ablate tissue adjacent thereto when actuated by an ablation actuator. The equatorial band has a length relative to the longitudinal axis of the expandable member that is narrow relative to the working length, and is also substantially shorter than its circumference when the working length is in the radially expanded position. A pattern of insulators may be included over an ablation element which otherwise spans the working length in order to form the equatorial band described. The expandable member is also adapted to conform to the pulmonary vein in the region of its ostium, such as by providing a great deal of radial compliance or by providing a taper along the working length which has a distally reducing outer diameter. A linear ablation element is provided adjacent to the circumferential ablation element in a combination assembly which is adapted for use in a less-invasive “maze”-type procedure in the region of the pulmonary vein ostia in the left ventricle. A cylindrical ultrasound transducer is provided on an inner member within the balloon and forms the circumferential ablation member by emitting a radial ultrasound signal which is circumferential to the transducer and highly collimated to the transducer's length. The circumferential ultrasound signal sonically couples to the balloon's outer skin to form the circumferential ablation element that is adapted to ablate a circumferential path of tissue engaged to the balloon.

    Systems and methods for ablating body tissue
    37.
    发明授权
    Systems and methods for ablating body tissue 失效
    用于烧伤身体组织的系统和方法

    公开(公告)号：US5921982A

    公开(公告)日：1999-07-13

    申请号：US846739

    申请日：1997-04-30

    申请人： Michael D. Lesh ,  Stuart D. Edwards

    发明人： Michael D. Lesh ,  Stuart D. Edwards

    IPC分类号： A61B18/14 ,  A61B17/36

    CPC分类号： A61B18/1492 ,  A61B2017/003 ,  A61B2018/0016 ,  A61B2018/00214 ,  A61B2018/00273 ,  A61B2018/00815 ,  A61B2018/00839 ,  A61B2018/1425 ,  A61B2018/1435 ,  A61B2090/3782 ,  A61N7/02

    摘要： A medical probe device for contacting tissue within the body a catheter tube having a control end and a probe end. The probe end includes a housing having a port. An element is located within the housing that is movable between a first position confined within the housing and a second position extending through the port outside the housing. The element has a distal tip adapted to penetrate a tissue region during movement between the first and second position. The element comprises an electrode for emitting electromagnetic radio frequency energy into the tissue region, or cannula with an interior lumen for conveying fluid to and from the tissue region, or a sensor for sensing temperature conditions in the tissue region.

    摘要翻译： 一种医疗探针装置，用于使身体内的组织具有具有控制端和探针端的导管。 探针端部包括具有端口的壳体。 元件位于壳体内，其可在限制在壳体内的第一位置和延伸穿过壳体外部的端口的第二位置之间移动。 元件具有适于在第一和第二位置之间移动期间穿透组织区域的远侧末端。 该元件包括用于将电磁射频能量发射到组织区域中的电极，或具有用于向组织区域输送流体的内腔的插管或用于感测组织区域中的温度条件的传感器。

    Systems and methods for analyzing cardiac biopotential morphologies by cross-correlation
    38.
    发明授权
    Systems and methods for analyzing cardiac biopotential morphologies by cross-correlation 失效
    通过互相关分析心脏生物电位形态的系统和方法

    公开(公告)号：US5792064A

    公开(公告)日：1998-08-11

    申请号：US949287

    申请日：1997-10-21

    申请人： Dorin Panescu ,  Michael D. Lesh ,  David K. Swanson ,  James G. Whayne

    发明人： Dorin Panescu ,  Michael D. Lesh ,  David K. Swanson ,  James G. Whayne

    IPC分类号： A61B18/14 ,  A61N1/362 ,  A61B5/04

    CPC分类号： A61B18/1492 ,  A61N1/362

    摘要： An analog or digital processing element and associated method analyses electrograms or electrocardiograms to locate sites potentially appropriate for ablation. The element and method compares a first number of electrogram or electrocardiogram samples recorded over time during a cardiac event of known diagnosis with a second number of paced electrogram or electrocardiogram samples recorded over time. The comparison cross-correlates the first number of electrogram samples with the second number of paced electrogram samples. The element and method generate an output based upon the cross-correlation. The element and method compare the output to a predetermined value to determine whether a pacing site for the paced electrogram or electrocardiogram samples is near to a potential ablation site.

    摘要翻译： 模拟或数字处理元件和相关联的方法分析电描记图或心电图以定位潜在适合消融的位置。 元件和方法将在已知诊断的心脏事件期间随时间记录的第一数量的电描记图或心电图样本与随时间记录的第二数量的起搏电描记图或心电图样品进行比较。 该比较将第一数量的电描记图样本与第二数量的步调电子照相样本相互关联。 元素和方法基于互相关产生输出。 元件和方法将输出与预定值进行比较，以确定起搏电图或心电图样本的起搏部位是否接近潜在的消融部位。