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28 条记录 (耗时 0.045 秒)

    Steerable catheter
    1.
    发明授权
    Steerable catheter 有权
    导向导管

    公开(公告)号：US07682358B2

    公开(公告)日：2010-03-23

    申请号：US10697486

    申请日：2003-10-30

    申请人： George Gullickson ,  Mark T. Stewart ,  Joseph E. Cardinal ,  Harry A. Puryear ,  Scott G. Klimek ,  James R. Skarda ,  Richard A. Thompson, II ,  Alan L. Carlson

    发明人： George Gullickson ,  Mark T. Stewart ,  Joseph E. Cardinal ,  Harry A. Puryear ,  Scott G. Klimek ,  James R. Skarda ,  Richard A. Thompson, II ,  Alan L. Carlson

    IPC分类号： A61M25/092

    CPC分类号： A61M25/0136

    摘要： A deflection mechanism for selectively inducing a bend in a catheter body includes an elongated deflection wire extending within a deflection lumen of the catheter body and into a handle. A guide track is formed within the handle and a thumb wheel is mounted proximal to the elongated guide track within the handle and supports a pinion gear; the thumb wheel and the pinion gear are adapted to be rotated about a common thumb wheel axis, which extends substantially perpendicular to the longitudinal axis. A rack arm extends obliquely to the longitudinal axis of the handle and includes runners received by the guide track, an attachment point coupling the deflection wire to the rack arm and a linear rack engaging the pinion gear. Rotation of the thumb wheel in a first direction draws the deflection wire proximally through the deflection lumen.

    摘要翻译： 用于选择性地诱导导管主体中的弯曲的偏转机构包括在导管主体的偏转腔内延伸并延伸到手柄中的细长偏转线。 引导轨道形成在手柄内，拇指轮安装在手柄内的细长导轨附近，并支撑小齿轮; 拇指轮和小齿轮适于围绕基本上垂直于纵向轴线延伸的公共拇指轮轴旋转。 齿条臂相对于手柄的纵向轴线倾斜地延伸，并且包括由导轨接收的跑道，将偏转线连接到齿条臂的连接点和与小齿轮啮合的直线齿条。 拇指轮在第一方向的旋转将偏转线向近侧拉出通过偏转内腔。

    Ablation system and method of use
    7.
    发明授权
    Ablation system and method of use 有权
    消融系统和使用方法

    公开(公告)号：US06648883B2

    公开(公告)日：2003-11-18

    申请号：US10132379

    申请日：2002-04-24

    申请人： David E. Francischelli ,  Mark T. Stewart ,  James R. Skarda ,  Rahul Mehra

    发明人： David E. Francischelli ,  Mark T. Stewart ,  James R. Skarda ,  Rahul Mehra

    IPC分类号： A61B1818

    CPC分类号： A61B18/1206 ,  A61B18/1445 ,  A61B2018/0016 ,  A61B2018/00351 ,  A61B2018/00363 ,  A61B2018/00577 ,  A61B2018/00702 ,  A61B2018/00761 ,  A61B2018/00791 ,  A61B2018/00875 ,  A61B2018/00886 ,  A61B2018/1467 ,  A61B2218/002

    摘要： A system and method for creating lesions and assessing their completeness or transmurality. Assessment of transmurality of a lesion is accomplished by monitoring the impedance of the tissue to be ablated. Rather than attempting to detect a desired drop or a desired increase impedance, completeness of a lesion is detected in response to the measured impedance remaining at a stable level for a desired period of time, referred to as an impedance plateau. The mechanism for determining transmurality of lesions adjacent individual electrodes or pairs may be used to deactivate individual electrodes or electrode pairs, when the lesions in tissue adjacent these individual electrodes or electrode pairs are complete, to create an essentially uniform lesion along the line of electrodes or electrode pairs, regardless of differences in tissue thickness adjacent the individual electrodes or electrode pairs.

    摘要翻译： 用于创建病变并评估其完整性或透视性的系统和方法。 通过监测要消融的组织的阻抗来评估病变的透壁性。 不是试图检测到期望的下降或期望的增加阻抗，而是响应于被测量的阻抗保持在稳定的电平，在期望的时间段（被称为阻抗平台）来检测损伤的完整性。 当邻近这些单独的电极或电极对的组织中的损伤完成时，用于确定邻近各个电极或对的损伤的透壁性的机制可用于使单个电极或电极对失活，以产生沿电极线或基本均匀的病变 电极对，而不管邻近各个电极或电极对的组织厚度的差异。

    Ablation catheter assembly with radially decreasing helix and method of use
    10.
    发明授权
    Ablation catheter assembly with radially decreasing helix and method of use 有权
    消融导管组件具有径向减小的螺旋和使用方法

    公开(公告)号：US07771421B2

    公开(公告)日：2010-08-10

    申请号：US10655197

    申请日：2003-09-04

    申请人： Mark T. Stewart ,  James R. Skarda

    发明人： Mark T. Stewart ,  James R. Skarda

    IPC分类号： A61B18/14

    CPC分类号： A61B18/1492 ,  A61B2017/00044 ,  A61B2017/00243 ,  A61B2017/00867 ,  A61B2018/00065 ,  A61B2018/00214 ,  A61B2018/00267 ,  A61B2018/00351 ,  A61B2018/00375 ,  A61B2018/00404 ,  A61B2018/00898 ,  A61B2018/1407 ,  A61B2018/1435 ,  A61B2018/1472

    摘要： A catheter assembly for treatment of cardiac arrhythmia. The catheter assembly includes a catheter body and an ablative energy source. The catheter body includes a proximal portion, an intermediate portion, and a distal portion. The intermediate portion extends from the proximal portion and defines a longitudinal axis. The distal portion extends from the intermediate portion and includes an ablation section and a tip. The ablation section forms a loop defining a diameter greater than an outer dimension of a pulmonary vein ostium. The tip extends distally from the ablation section and is configured to locate a pulmonary vein. Finally, the ablative energy source is associated with the ablation section. With this configuration, upon activation of the energy source, the ablation section ablates a desired lesion pattern. In one preferred embodiment, the ablation section forms a distally decreasing radius helix, whereas the tip includes a relatively linear leader section. With this one preferred configuration, the tip readily locates a pulmonary vein and guides the ablation section to a seated relationship about a pulmonary vein ostium (or extra-ostial).

    摘要翻译： 用于治疗心律失常的导管组件。 导管组件包括导管主体和消融能源。 导管主体包括近端部分，中间部分和远端部分。 中间部分从近端部分延伸并且限定纵向轴线。 远侧部分从中间部分延伸并且包括消融部分和尖端。 消融部分形成限定直径大于肺静脉口的外部尺寸的环。 尖端从消融部分向远端延伸并且被配置为定位肺静脉。 最后，烧蚀能源与消融部分相关联。 利用这种配置，在激活能量源时，消融部分消除所需的损伤模式。 在一个优选实施例中，消融部分形成远端减小的半径螺旋，而尖端包括相对线性的引导部分。 利用这一优选的构造，尖端容易地定位肺静脉，并将消融部分引导到关于肺静脉口（或口外）的就座关系。