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    METHOD AND APPARATUS FOR COMPLEX IMPEDANCE COMPENSATION AND FOR DETERMINING TISSUE MORPHOLOGY BASED ON PHASE ANGLE
    81.
    发明申请
    METHOD AND APPARATUS FOR COMPLEX IMPEDANCE COMPENSATION AND FOR DETERMINING TISSUE MORPHOLOGY BASED ON PHASE ANGLE 有权
    复合阻抗补偿方法和装置，用于确定基于相角的组织形态学

    公开(公告)号：US20090171235A1

    公开(公告)日：2009-07-02

    申请号：US11966320

    申请日：2007-12-28

    申请人： Clint Schneider ,  Hong Cao ,  Saurav Paul

    发明人： Clint Schneider ,  Hong Cao ,  Saurav Paul

    IPC分类号： A61B5/053

    CPC分类号： A61B5/053

    摘要： A compensation circuit has a predetermined, known complex impedance and is located in a handle of a catheter or in a distal end of a cable that connects to the catheter. The compensation circuit is probed with a pilot signal produced by a compensation control that is external to the catheter, by way of an electrical connection through the connecting cable. The compensation control measures the complex impedance, which is the combination of the circuit's known impedance as well as that of the cable. The compensation control then determines the difference between the measured and the known complex impedances. The difference represents that which is attributable to the cable, and is used to compensate or cancel out such cable-related contributions to complex impedance in measurements made over other electrical connections in the same cable. In another aspect, an unknown tissue is identified as one of a plurality of possible tissue types such as regular myocardium, scar and fat based on the measured phase angle of the complex impedance of the unknown tissue.

    摘要翻译： 补偿电路具有预定的已知的复阻抗，并且位于导管的手柄或连接到导管的电缆的远端中。 通过通过连接电缆的电连接通过由导管外部的补偿控制产生的导频信号来探测补偿电路。 补偿控制测量复阻抗，这是电路已知阻抗以及电缆的阻抗的组合。 然后，补偿控制确定测量的和已知的复阻抗之间的差。 差异表示归因于电缆的差异，并且用于在与同一电缆中的其它电连接相关的测量中补偿或抵消与电缆相关的贡献。 在另一方面，基于所测量的未知组织的复阻抗的相位角，未知组织被鉴定为多种可能的组织类型之一，例如常规心肌，瘢痕和脂肪。

    Catheter electrode and rail system for cardiac ablation
    82.
    发明申请
    Catheter electrode and rail system for cardiac ablation 有权
    导管电极和轨道系统用于心脏消融

    公开(公告)号：US20050267461A1

    公开(公告)日：2005-12-01

    申请号：US10857421

    申请日：2004-05-27

    申请人： Hong Cao ,  John Roop ,  Kedar Belhe ,  Saurav Paul

    发明人： Hong Cao ,  John Roop ,  Kedar Belhe ,  Saurav Paul

    IPC分类号： A61B18/14

    CPC分类号： A61B18/1492 ,  A61B2017/00867 ,  A61B2018/00351 ,  A61B2018/143 ,  C08L2201/12

    摘要： The instant invention is directed toward an ablation catheter and sheath incorporating wire rail system. The catheter may have a combination of rigid and flexible components to orient an ablation electrode at the distal tip toward the target tissue. The wire rail acts to guide an ablation tip along the tissue to aid in the formation of spot or continuous linear lesions on a trabecular surface, e.g., in the right atrium along the isthmus between the ostium of the inferior vena cava and the tricuspid valve.

    摘要翻译： 本发明涉及一种包含线轨系统的消融导管和护套。 导管可以具有刚性和柔性部件的组合，以将远端处的消融电极朝向靶组织定向。 线轨用于沿着组织引导消融尖端以帮助在小梁表面上形成斑点或连续的线性损伤，例如沿着下腔静脉的口和三尖瓣之间的峡部的右心房。

    Assessment of electrode coupling for tissue ablation
    83.
    发明授权
    Assessment of electrode coupling for tissue ablation 有权

    公开(公告)号：US08317783B2

    公开(公告)日：2012-11-27

    申请号：US12095686

    申请日：2006-12-06

    申请人： Hong Cao ,  Saurav Paul

    发明人： Hong Cao ,  Saurav Paul

    IPC分类号： A61B18/04 ,  A61B5/05

    CPC分类号： A61B18/1206 ,  A61B18/1492 ,  A61B2018/00363 ,  A61B2018/00869 ,  A61B2018/00898

    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.

    Anchoring introducer sheath with distal slots for catheter delivery and translation
    85.
    发明申请
    Anchoring introducer sheath with distal slots for catheter delivery and translation 审中-公开
    锚定导管鞘与远端狭缝导管输送和翻译

    公开(公告)号：US20050273096A1

    公开(公告)日：2005-12-08

    申请号：US11190559

    申请日：2005-07-27

    申请人： John Roop ,  Kedar Belhe ,  Hong Cao ,  Saurav Paul

    发明人： John Roop ,  Kedar Belhe ,  Hong Cao ,  Saurav Paul

    IPC分类号： A61B18/14

    CPC分类号： A61B18/1492 ,  A61B2017/00867 ,  A61B2018/00273 ,  A61B2018/00351 ,  A61B2018/143 ,  C08L2201/12

    摘要： An introducer sheath has multiple distal slots allowing for translation of a catheter within a cardiac cavity. A pair of longitudinal slots are provided on opposite sides of the sheath near the distal end. A portion of the catheter may deploy from one of the slots while the ablation tip deploys from the opposing slot. The sheath design provides greater maneuverability for the catheter in a direction orthogonal to the tissue to be ablated, while restricting lateral movement of the catheter. The longitudinal direction of the slots further aids in the formation of linear lesions using the catheter.

    摘要翻译： 引导器护套具有多个远端狭槽，允许导管在心腔内平移。 在远端附近的护套的相对侧上设置一对纵向槽。 导管的一部分可以从其中一个狭槽部署，同时消融尖端从相对的狭槽展开。 护套设计为导管在与要消融的组织垂直的方向上提供更大的操纵性，同时限制导管的横向移动。 槽的纵向方向进一步有助于使用导管形成线性损伤。

    Curved ablation catheter
    87.
    发明申请
    Curved ablation catheter 有权
    弯曲消融导管

    公开(公告)号：US20050267459A1

    公开(公告)日：2005-12-01

    申请号：US10856543

    申请日：2004-05-27

    申请人： Kedar Belhe ,  Saurav Paul ,  Hong Cao ,  John Roop

    发明人： Kedar Belhe ,  Saurav Paul ,  Hong Cao ,  John Roop

    IPC分类号： A61B18/14

    CPC分类号： A61B18/1492 ,  A61B2018/00351 ,  A61B2018/143 ,  A61B2018/1475 ,  A61B2018/1497

    摘要： A curved ablation catheter imparts ablative energy to target tissue, for example, along a trabecular slope, e.g., in the right atrium along the isthmus between the ostium of the inferior vena cava and the tricuspid valve. The catheter is formed with a preset curvature that, when deployed, both translates linearly and increases in radius to aid in the formation of spot or continuous linear lesions. A method of treating atrial flutter employs the curved ablation catheter.

    摘要翻译： 弯曲的消融导管向靶组织提供消融能量，例如沿着小梁斜面，例如沿着下腔静脉的口和三尖瓣之间的峡谷的右心房。 导管形成有预设曲率，当展开时，两者均线性地平移并且半径增加以帮助形成斑点或连续的线性损伤。 治疗心房扑动的方法采用弯曲消融导管。

    Anatomical thermal sensing device and method
    90.
    发明申请
    Anatomical thermal sensing device and method 有权

    公开(公告)号：US20130261491A1

    公开(公告)日：2013-10-03

    申请号：US13777556

    申请日：2013-02-26

    申请人： Saurav Paul ,  Todd R. Stangenes ,  Riki Thao

    发明人： Saurav Paul ,  Todd R. Stangenes ,  Riki Thao

    IPC分类号： A61B5/01

    CPC分类号： A61B18/1402 ,  A61B5/01 ,  A61B5/015 ,  A61B5/053 ,  A61B5/6852 ,  A61B5/6885 ,  A61B2562/0271

    摘要： A medical device utilizing temperature sensing to identify or assess anatomical bodies or structures includes an elongate tubular member, at least one electrode, a thermal sensor, and a temperature response assessment system or component. The at least one electrode may be connected to the distal portion of the elongate tubular member, and the one or more electrode can be configured to provide energy or heat to a portion of an anatomical body or structure. The thermal sensor may be configured to measure the thermal response of the portion of an anatomical body or structure, e.g., tissue or blood pools. The temperature response assessment system or component can be coupled to the thermal sensor. In embodiments, the device may include a lumen and port opening, which may accommodate a tool, such as a needle. Methods for using temperature sensing to identify an anatomical body or structure are also disclosed.