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    System and method for measurement of an impedance using a catheter such as an ablation catheter
    2.
    发明授权
    System and method for measurement of an impedance using a catheter such as an ablation catheter 有权

    公开(公告)号：US11896284B2

    公开(公告)日：2024-02-13

    申请号：US16851441

    申请日：2020-04-17

    Applicant: St. Jude Medical, Atrial Fibrillation Division, Inc.

    Inventor： Stephan P. Miller ,  Glen H. Kastner ,  Donald Curtis Deno

    IPC: A61B18/14 ,  A61B18/12 ,  A61B18/00 ,  A61B18/16

    CPC classification number: A61B18/1206 ,  A61B18/1492 ,  A61B2018/00577 ,  A61B2018/00875 ,  A61B2018/165

    Abstract: A catheter and patch electrode system is provided for use with an apparatus, such as an ablation generator, having a 4-wire interface for improved impedance measurement. The 4-wire interface includes a pair of source connectors across which an excitation signal is produced and a pair of sense connector wires across which the impedance is measured. The RF ablation generator may also produce an ablation signal across a source wire and an indifferent return patch electrode. The system further includes a cable that connects the generator to a catheter. The catheter includes a shaft having a proximal end and a distal end, with an ablation tip electrode disposed at the distal end. A source lead is electrically coupled to the tip electrode and extends through the shaft to the proximal end where it is terminated. An optional sense lead is also electrically coupled to the tip electrode and extends through the shaft to the proximal end. The system further includes a source return (e.g., skin patch) and a sense return (e.g., skin patch), either or none of which may be combined with the indifferent return, and if used may be placed on opposite sides of the patient for improved performance. The impedance sensor circuit produces an excitation signal across the source connectors, which is then carried to the catheter by the cable, then to the tip electrode, travels through the complex load (tissue volume), and returns to the generator via a patch electrode. The impedance is measured by observing the voltage drop across the sense connectors caused by the excitation signal.

    SYSTEM AND METHOD FOR ASSESSING EFFECTIVE DELIVERY OF ABLATION THERAPY
    3.
    发明申请
    SYSTEM AND METHOD FOR ASSESSING EFFECTIVE DELIVERY OF ABLATION THERAPY 审中-公开

    公开(公告)号：US20190151014A1

    公开(公告)日：2019-05-23

    申请号：US16195249

    申请日：2018-11-19

    Applicant: ST JUDE MEDICAL, ATRIAL FIBRILLATION DIVISION, INC

    Inventor： D. Curtis Deno ,  Stephan P. Miller

    IPC: A61B18/14 ,  A61B5/00 ,  A61B5/06 ,  A61B90/00

    Abstract: A system and method for assessing effective delivery of ablation therapy to a tissue in a body is provided. A three-dimensional anatomical map of the tissue is generated and displayed with the map defining a corresponding volume. An index is generated corresponding to a location within the volume with the index indicative of a state of ablation therapy at the location. The index may be derived from one or more factors such as the duration an ablation electrode is present at the location, the amount of energy provided, the degree of electrical coupling between an ablation electrode and the tissue at the location and temperature. A visual characteristic (e.g., color intensity) of a portion of the anatomical map corresponding to the location is then altered responsive to the index.

    Magnetic field-compatible components of a medical diagnostic and/or therapeutic system
    4.
    发明申请
    Magnetic field-compatible components of a medical diagnostic and/or therapeutic system 审中-公开
    医疗诊断和/或治疗系统的磁场兼容部件

    公开(公告)号：US20170014112A1

    公开(公告)日：2017-01-19

    申请号：US15205771

    申请日：2016-07-08

    Applicant: St. Jude Medical, Atrial Fibrillation Division, Inc.

    Inventor： Stephan P. Miller ,  Ryan M. Albu

    IPC: A61B17/00 ,  H01R13/648 ,  A61B34/20

    CPC classification number: A61B17/00 ,  A61B34/20 ,  A61B34/30 ,  A61B2017/0046 ,  A61B2017/00477 ,  A61B2034/2051 ,  A61B2034/301 ,  G01R33/025 ,  H01R13/6463 ,  H01R13/6469 ,  H01R13/648 ,  H01R13/6658 ,  H01R24/86 ,  H01R31/08 ,  H01R2201/12 ,  H01R2201/20

    Abstract: A medical device assembly comprises a medical device comprising a shaft having proximal and distal end portions. The device further comprises a sensor at the distal end portion of the shaft that comprises first and second leads extending therefrom to the proximal end portion of the shaft. The device further comprises an electromechanical connector having a plurality of pins at a first end thereof. First and second of the pins are electrically connected to the first and second sensor leads, respectively, thereby forming a first partial magnetic loop between the first and second pins. The connector further comprises first and second jumpers electrically connecting the first pin and third pins, and second and fourth pins, respectively, thereby forming a second partial magnetic loop. The partial magnetic loops are configured to combine with partial magnetic loops of another connector to form a pair of magnetic noise cancellation loops.

    Abstract translation: 医疗装置组件包括医疗装置，其包括具有近端部分和远端部分的轴。 该装置还包括在轴的远端部分处的传感器，其包括从其延伸到轴的近端部分的第一和第二引线。 该装置还包括在其第一端具有多个销的机电连接器。 第一和第二引脚分别电连接到第一和第二传感器引线，由此在第一和第二引脚之间形成第一部分磁回路。 连接器还包括分别电连接第一引脚和第三引脚以及第二和第四引脚的第一和第二跳线，从而形成第二部分磁环。 部分磁环被配置为与另一个连接器的部分磁环组合以形成一对磁噪声消除环。

    SYSTEM AND METHOD FOR MEASUREMENT OF AN IMPEDANCE USING A CATHETER SUCH AS AN ABLATION CATHETER
    7.
    发明申请
    SYSTEM AND METHOD FOR MEASUREMENT OF AN IMPEDANCE USING A CATHETER SUCH AS AN ABLATION CATHETER 审中-公开

    公开(公告)号：US20200237426A1

    公开(公告)日：2020-07-30

    申请号：US16851441

    申请日：2020-04-17

    Applicant: St. Jude Medical, Atrial Fibrillation Division, Inc.

    Inventor： Stephan P. Miller ,  Glen H. Kastner ,  Donald Curtis Deno

    IPC: A61B18/12

    Abstract: A catheter and patch electrode system is provided for use with an apparatus, such as an ablation generator, having a 4-wire interface for improved impedance measurement. The 4-wire interface includes a pair of source connectors across which an excitation signal is produced and a pair of sense connector wires across which the impedance is measured. The RF ablation generator may also produce an ablation signal across a source wire and an indifferent return patch electrode. The system further includes a cable that connects the generator to a catheter. The catheter includes a shaft having a proximal end and a distal end, with an ablation tip electrode disposed at the distal end. A source lead is electrically coupled to the tip electrode and extends through the shaft to the proximal end where it is terminated. An optional sense lead is also electrically coupled to the tip electrode and extends through the shaft to the proximal end. The system further includes a source return (e.g., skin patch) and a sense return (e.g., skin patch), either or none of which may be combined with the indifferent return, and if used may be placed on opposite sides of the patient for improved performance. The impedance sensor circuit produces an excitation signal across the source connectors, which is then carried to the catheter by the cable, then to the tip electrode, travels through the complex load (tissue volume), and returns to the generator via a patch electrode. The impedance is measured by observing the voltage drop across the sense connectors caused by the excitation signal.

    System and method for assessing coupling between an electrode and tissue
    10.
    发明授权
    System and method for assessing coupling between an electrode and tissue 有权
    用于评估电极和组织之间的耦合的系统和方法

    公开(公告)号：US09173586B2

    公开(公告)日：2015-11-03

    申请号：US13777580

    申请日：2013-02-26

    Applicant: St. Jude Medical, Atrial Fibrillation Division, Inc.

    Inventor： Don Curtis Deno ,  Stephan P. Miller ,  Lewis C. Hill ,  Yuriy Malinin ,  Haris J. Sih

    IPC: A61B5/05 ,  A61B5/053 ,  A61B5/00 ,  A61B18/12 ,  A61B18/14 ,  A61B18/00 ,  A61B19/00

    CPC classification number: A61B18/00 ,  A61B5/053 ,  A61B5/6885 ,  A61B5/6886 ,  A61B18/1233 ,  A61B18/14 ,  A61B18/1492 ,  A61B2018/00178 ,  A61B2018/00642 ,  A61B2018/00773 ,  A61B2018/00875 ,  A61B2090/065

    Abstract: A system and method for assessing a degree of coupling between an electrode and tissue in a body is provided. Values for first and second components of a complex impedance (e.g., resistance and reactance or impedance magnitude and phase angle) between the electrode and the tissue are obtained. These values are used together with a standardization value indicative of a deviation from a reference standard by a parameter associated with at least one of the body, the electrode and another component of the system to calculate a coupling index that is indicative of a degree of coupling between the electrode and the tissue. The coupling index may be displayed to a clinician in a variety of ways to indicate the degree of coupling to the clinician. The system and method find particular application in ablation of tissue by permitting a clinician to create lesions in the tissue more effectively and safely.

    Abstract translation: 提供了一种用于评估身体中电极和组织之间的耦合程度的系统和方法。 获得电极和组织之间的复阻抗的第一和第二分量的值（例如，电阻和电抗或阻抗幅度和相位角）。 这些值与表示与参考标准的偏差的标准化值一起使用与系统的主体，电极和另一部件中的至少一个相关联的参数来计算表示耦合度的耦合指数 在电极和组织之间。 耦合指数可以以各种方式显示给临床医生以指示与临床医生的耦合程度。 该系统和方法通过允许临床医生更有效和安全地在组织中产生损伤来发现组织消融中的特定应用。

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