公开(公告)号：WO0230310A9

公开(公告)日：2003-02-20

申请号：PCT/US0130578

申请日：2001-10-01

Applicant: MEDTRONIC INC

Inventor： STEWART MARK T ,  GOODE JOHNSON E ,  SPECKIEN JAMES N ,  TAUBE MARK A ,  WARMAN EDUARDO N

IPC: A61B17/00 ,  A61B18/14 ,  A61M25/01

CPC classification number: A61M25/0147 ,  A61B18/1492 ,  A61B2017/00243 ,  A61B2018/00916 ,  A61M25/0152 ,  A61M2025/015 ,  A61M2025/0161

Abstract: Steerable electrophysiology catheters for use in mapping and/or ablation of accessory pathways in myocardial tissue of the heart wall and methods of use thereof are disclosed. The catheter comprises a catheter body and handle, the catheter body having a proximal section and a distal section and manipulators that enable the deflection of a distal segment of the distal tip section with respect to the independently formed curvature of a proximal segment of the distal tip section through a bending or knuckle motion of an intermediate segment between the proximal and distal segments. A wide angular range of deflection within a very small curve or bend radius in the intermediate segment is obtained.

Abstract translation: 公开了用于在心壁的心肌组织中附着途径的测绘和/或消融中的可操纵的电生理学导管及其使用方法。 导管包括导管主体和手柄，导管主体具有近端部分和远端部分以及操纵器，其能够相对于远端尖端的近端段的独立形成的曲率偏转远侧末端部分的远侧部分 通过近端段和远端段之间的中间段的弯曲或转向关节运动。 获得在中间段内的非常小的曲线或弯曲半径内的宽的角度范围的偏转。

公开(公告)号：WO0245608A2

公开(公告)日：2002-06-13

申请号：PCT/US0144977

申请日：2001-11-30

Applicant: MEDTRONIC INC

Inventor： STEWART MARK T ,  SKARDA JAMES R ,  FLICKINGER WILLIAM J ,  FRANCISCHELLI DAVID E

IPC: A61B17/00 ,  A61B18/14

CPC classification number: A61B18/1492 ,  A61B2017/00044 ,  A61B2017/00243 ,  A61B2017/00867 ,  A61B2018/00214 ,  A61B2018/00267 ,  A61B2018/00351 ,  A61B2018/00375 ,  A61B2018/1407 ,  A61B2018/1435

Abstract: A catheter assembly and method for treatment of cardiac arrhythmia. In one preferred embodiment, the catheter assembly includes a cetheter body, at least one electrode, and a fluid source. The catheter body includes a proximal portion, an intermediate portion, a distal portion, a first lumen, and an ablation section. The intermediate portion extends from the proximal portion and defines a longitudinal axis. The distal portion extends from the intermediate portion and forms a helix or coil. The first lumen extends from the proximal portion to the distal portion. Finally, the ablation section is formed along the helix of the distal portion and defines a loop transverse to the longitudinal axis. The ablation section is, in one preferred embodiment, comprised of a microporous material in fluid communication with the first lumen so as to irrigate fluid from the first lumen to an exterior surface of the ablation section. The electrode is associated with the ablation section. Finally, the fluid source is provided to supply a conductive fluid to the first lumen. With the configuration, upon activation, the electrode supplies an ablation energy to fluid irrigated to the exterior surface of the ablation section, thereby ablating a continuous, closed lesion pattern. During use, for example, the catheter assembly can ablate a closed lesion pattern corresponding with the loop defined by the ablation section on a chamber wall about a pulmonary vein ostium to electrically isolate the pulmonary vein from the left atrium. In one preferred embodiment, the ablation section is comprised of a high density, expanded PTFE material. In another preferred embodiment, a shaping wire is slidably disposed within the catheter body to selectively dictate the desired helical shape of the distal portion.

Abstract translation: 一种用于治疗心律失常的导管组件和方法。 在一个优选实施例中，导管组件包括绦虫体，至少一个电极和流体源。 导管主体包括近端部分，中间部分，远端部分，第一内腔和消融部分。 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形成螺旋或线圈。 第一管腔从近端部分延伸到远端部分。 最后，消融部分沿着远侧部分的螺旋形成并且限定了一个横向于纵向轴线的环。 在一个优选实施例中，消融部分包括与第一内腔流体连通的微孔材料，以便将流体从第一内腔冲洗到消融部分的外表面。 电极与消融部分相关联。 最后，提供流体源以向第一管腔提供导电流体。 利用该构造，在激活时，电极将消融能量提供给冲洗到消融部分的外表面的流体，从而消除连续的闭合病变图案。 在使用期间，例如，导管组件可以消除对应于围绕肺静脉口的腔室壁上的消融部分限定的环的封闭病变图案，以将肺静脉与左心房电隔离。 在一个优选实施例中，消融部分由高密度，膨胀的PTFE材料组成。 在另一优选实施例中，成形线可滑动地设置在导管主体内，以选择性地决定远侧部分的期望的螺旋形状。