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29 条记录 (耗时 0.026 秒)

    Ablation apparatus with ultrasonic imaging capabilities
    4.
    发明授权
    Ablation apparatus with ultrasonic imaging capabilities 失效
    消融装置具有超声成像能力

    公开(公告)号：US5876340A

    公开(公告)日：1999-03-02

    申请号：US840905

    申请日：1997-04-17

    申请人： Hosheng Tu ,  Weng-Kwen Raymond Chia

    发明人： Hosheng Tu ,  Weng-Kwen Raymond Chia

    IPC分类号： A61B18/14 ,  A61B8/00 ,  A61B17/39

    CPC分类号： A61B18/1492 ,  A61B18/1815 ,  A61B2018/00404 ,  A61B2018/00791 ,  A61B2018/0091 ,  A61B2018/1412 ,  A61B2090/3782 ,  A61B2090/3925

    摘要： An RF ablation apparatus has a delivery catheter with distal and proximal ends. A handle is attached to the proximal end of the delivery catheter. The delivery catheter has an electrode deployment means where said electrode deployment means includes a retractable tip section comprising a deployable electrode with portion of one side having a sharp edge. The tip section has a non-deployed state when it is positioned in the delivery catheter. On the other hand, the tip section has a distended deployed state when it is advanced out of the distal end of said delivery catheter. The deployed tip section has a preformed shape while the farther distal deployed electrode defines an ablation target along with portion of the forward side having a sharp edge on said electrode. The forward edge of the deployed electrode has a slightly curvature or an essentially straight shape. Said deployable electrode has ultrasonic imaging capabilities.

    摘要翻译： RF消融装置具有远端和近端的输送导管。 手柄附接到输送导管的近端。 输送导管具有电极展开装置，其中所述电极展开装置包括可伸缩末端部分，其包括具有尖锐边缘的一侧部分的可展开电极。 当尖端部分定位在输送导管中时，该尖端部分具有非展开状态。 另一方面，当尖端部分从所述输送导管的远端推出时，其具有扩张展开状态。 所展开的尖端部分具有预成型形状，而较远的远侧展开电极限定了消融靶，同时前向侧的部分在所述电极上具有尖锐边缘。 所展开的电极的前边缘具有略微曲率或基本上直的形状。 所述可展开电极具有超声成像能力。

    Catheter system having a ball electrode
    7.
    发明授权
    Catheter system having a ball electrode 失效
    具有球电极的导管系统

    公开(公告)号：US5843152A

    公开(公告)日：1998-12-01

    申请号：US867469

    申请日：1997-06-02

    申请人： Hosheng Tu ,  Weng-Kwen Raymond Chia

    发明人： Hosheng Tu ,  Weng-Kwen Raymond Chia

    IPC分类号： A61B18/14 ,  A61N1/06 ,  A61N1/40

    CPC分类号： A61N1/403 ,  A61B18/1492 ,  A61N1/06 ,  A61B2017/003 ,  A61B2018/00029 ,  A61B2018/00351 ,  A61B2018/00357 ,  A61B2018/00559 ,  A61B2018/00577 ,  A61B2018/00815 ,  A61B2018/00821 ,  A61B2018/1417

    摘要： An improved catheter system having at least one electrode at its tip section, can be used in ablating the arrhythmogenic point of a patient. A catheter suitable for radiofrequency ablation of cardiac tissues comprises a catheter shaft having a distal section, a distal end, a proximal end and at least one lumen extending therebetween, wherein a rotatable ball electrode is disposed at the tip section of said catheter. In one embodiment, the ablation catheter has a temperature sensor and a close-loop temperature control mechanism. In another embodiment, the ablation catheter has fluid infusion and irrigation means at its distal tip section for creating a deep and large lesion by applying radiofrequency energy and cooled fluid to said electrode.

    摘要翻译： 在其尖端部分具有至少一个电极的改进的导管系统可用于消除患者的致心律失常点。 适用于心脏组织射频消融的导管包括导管轴，其具有远侧部分，远端，近端和在其间延伸的至少一个内腔，其中可旋转的球形电极设置在所述导管的尖端部分。 在一个实施例中，消融导管具有温度传感器和闭环温度控制机构。 在另一个实施例中，消融导管在其远侧末端部分具有流体输注和冲洗装置，用于通过将射频能量和冷却流体施加到所述电极来产生深而大的损伤。

    Catheter system having safety means
    9.
    发明授权
    Catheter system having safety means 失效
    具有安全装置的导管系统

    公开(公告)号：US5782900A

    公开(公告)日：1998-07-21

    申请号：US880837

    申请日：1997-06-23

    申请人： Alan de la Rama ,  Weng-Kwen Raymond Chia ,  Hosheng Tu

    发明人： Alan de la Rama ,  Weng-Kwen Raymond Chia ,  Hosheng Tu

    IPC分类号： A61B18/14 ,  A61N1/05 ,  A61N1/06

    CPC分类号： A61N1/06 ,  A61B18/1492 ,  A61N1/056 ,  A61B2017/003 ,  A61B2017/00473 ,  A61B2018/00351 ,  A61B2018/00577 ,  A61B2018/00791 ,  A61B2018/00839

    摘要： A catheter system suitable for electrophysiology mapping and radiofrequency ablation of cardiac tissue comprises a catheter shaft having a distal end, a proximal handle, and at least a lumen extending therebetween, wherein a distal section of the shaft is either a fixed curve or deflectable; and safety anchoring means being provided to maintain the integrity of the catheter by holding the tip electrode in place. In one embodiment, the safety means is a tip electrode with safety anchoring pins. In another embodiment, the safety means is a tip electrode with extended flexible stem having open slots on said stem.

    摘要翻译： 适用于心脏组织的电生理学测绘和射频消融的导管系统包括导管轴，其具有远端，近端手柄和至少延伸在其间的内腔，其中所述轴的远端部分是固定曲线或可偏转的; 并且提供安全锚固装置以通过将尖端电极保持在适当位置来维持导管的完整性。 在一个实施例中，安全装置是具有安全锚定销的尖端电极。 在另一个实施例中，安全装置是具有延伸的柔性杆的尖端电极，其在所述杆上具有开口槽。

    Intravascular ultrasound locating system
    10.
    发明授权
    Intravascular ultrasound locating system 有权
    血管内超声定位系统

    公开(公告)号：US06259941B1

    公开(公告)日：2001-07-10

    申请号：US09275553

    申请日：1999-03-24

    申请人： Weng-Kwen Raymond Chia ,  Hosheng Tu

    发明人： Weng-Kwen Raymond Chia ,  Hosheng Tu

    IPC分类号： A61B505

    CPC分类号： A61B5/0422 ,  A61B1/0051 ,  A61B5/6856 ,  A61B5/6857 ,  A61B5/6858 ,  A61B8/12 ,  A61B8/445 ,  A61B18/1492 ,  A61B2034/2063 ,  A61B2562/0209 ,  A61B2562/043

    摘要： An improved catheter system having intravascular ultrasound locating capabilities comprising a locator catheter and an ultrasound receiver catheter resulting in an effective electrophysiology procedure without undesired side effects of using a conventional x-ray imaging system. Said catheter system comprising a locator catheter, a reference catheter and a data acquisition computer; the locator catheter comprises at least one electrode at its distal tip section and an ultrasound crystal secured on the catheter shaft proximal to the distal end. The reference catheter comprises at least three ultrasound crystal beacons, a first ultrasound crystal beacon of said at least three ultrasound crystal beacons being located at the distal end of the reference catheter and being spaced apart from the remaining ultrasound crystal beacons, wherein the first ultrasound crystal beacon is adapted to be inserted into a vascular vessel, the reference catheter having pre-determined locations with reference to an external locating calibration system, wherein said ultrasound beacons can emit and receive ultrasound signals.

    摘要翻译： 具有血管内超声定位能力的改进的导管系统包括定位导管和超声接收器导管，其导致有效的电生理过程，而不需要使用常规x射线成像系统的不需要的副作用。 所述导管系统包括定位导管，参考导管和数据采集计算机; 所述定位导管包括在其远侧末端部分处的至少一个电极和固定在靠近远端的导管轴上的超声波晶体。 参考导管包括至少三个超声波晶体信标，所述至少三个超声晶体信标的第一超声波晶体信标位于参考导管的远端并且与其余的超声晶体信标间隔开，其中第一超声波晶体 信标适于插入血管容器中，参考导管具有参考外部定位校准系统的预定位置，其中所述超声信标可以发射和接收超声信号。