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    Pressure-sensitive conductive composite contact sensor and method for contact sensing
    1.
    发明授权
    Pressure-sensitive conductive composite contact sensor and method for contact sensing 有权
    压敏导电复合接触传感器和接触感应方法

    公开(公告)号：US09579483B2

    公开(公告)日：2017-02-28

    申请号：US11647314

    申请日：2006-12-29

    Applicant: Kedar Ravindra Belhe ,  Saurav Paul

    Inventor： Kedar Ravindra Belhe ,  Saurav Paul

    IPC: A61B5/00 ,  A61M25/00 ,  A61B18/14

    CPC classification number: A61B18/1492 ,  A61B5/6885 ,  A61B2018/00083 ,  A61B2018/00577 ,  A61B2018/00875 ,  A61B2018/00988 ,  A61B2090/064 ,  A61B2090/065 ,  A61B2562/0209 ,  A61M25/00 ,  A61M2025/0002 ,  G01L1/20

    Abstract: A catheter assembly for assessing contact between the catheter assembly and tissue is disclosed. The assembly includes a catheter shaft and a pressure sensitive conductive composite member whose electrical resistance varies with pressure applied to the catheter assembly. The assembly also includes at least one measurement terminal to permit the measurement of changes in the electrical characteristics of the pressure sensitive conductive composite member. The assembly may optionally include a measurement device to measure resistance, impedance and/or other electrical characteristics. The assembly may utilize a reference electrode secured to the patient's tissue, which permits the measurement device to measure changes between the reference electrode and the at least one measurement terminal. Optionally, the assembly may include a conductive outer layer. Also disclosed are sensor assemblies, contact sensor, methods of contact sensing, and methods of manufacturing relating to the use of pressure sensitive conductive composites.

    Abstract translation: 公开了一种用于评估导管组件和组织之间的接触的导管组件。 组件包括导管轴和压力敏感的导电复合构件，其电阻随着施加到导管组件的压力而变化。 组件还包括至少一个测量端子，以允许测量压敏导电复合构件的电特性的变化。 组件可以可选地包括测量电阻，阻抗和/或其他电特性的测量装置。 组件可以利用固定到患者组织的参考电极，其允许测量装置测量参考电极和至少一个测量终端之间的变化。 可选地，组件可以包括导电外层。 还公开了传感器组件，接触传感器，接触感测方法以及与使用压敏导电复合材料有关的制造方法。

    ASSESSMENT OF ELECTRODE COUPLING FOR TISSUE ABLATION
    3.
    发明申请
    ASSESSMENT OF ELECTRODE COUPLING FOR TISSUE ABLATION 有权
    电器联合电击组织评估

    公开(公告)号：US20120323237A1

    公开(公告)日：2012-12-20

    申请号：US13593676

    申请日：2012-08-24

    Applicant: Saurav Paul ,  Hong Cao ,  Kedar Ravindra Belhe ,  Chou Thao

    Inventor： Saurav Paul ,  Hong Cao ,  Kedar Ravindra Belhe ,  Chou Thao

    IPC: A61B18/14

    CPC classification number: A61B18/1206 ,  A61B5/0538 ,  A61B18/1492 ,  A61B2018/00357 ,  A61B2018/00577 ,  A61B2018/00732 ,  A61B2018/00869 ,  A61B2018/00875 ,  A61B2018/124 ,  A61B2018/128

    Abstract: 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.

    Abstract translation: 公开了电极导管和用于评估电极组织接触和耦合的方法。 示例性电极导管包括适于施加电能的电极。 测量电路适于在电极接近目标组织时测量电极和地面之间的阻抗。 处理器至少部分地基于由测量电路测量的阻抗的电抗来确定目标组织的接触和耦合条件。 在另一示例性实施例中，电极导管至少部分地基于阻抗的相位角确定接触和耦合条件。

    System and method for three-dimensional mapping of electrophysiology information
    4.
    发明授权
    System and method for three-dimensional mapping of electrophysiology information 有权
    电生理信息三维映射的系统和方法

    公开(公告)号：US08038625B2

    公开(公告)日：2011-10-18

    申请号：US11227006

    申请日：2005-09-15

    Applicant: Valtino X. Afonso ,  Kedar Ravindra Belhe ,  Jeffrey A. Schweitzer

    Inventor： Valtino X. Afonso ,  Kedar Ravindra Belhe ,  Jeffrey A. Schweitzer

    IPC: A61B5/02 ,  A61B5/05

    CPC classification number: A61B5/0422 ,  A61B5/04012 ,  A61B5/044 ,  A61B5/0452

    Abstract: An electrophysiology apparatus is used to measure electrical activity occurring in a heart of a patient and to visualize the electrical activity and/or information related to the electrical activity. A three-dimensional map of the electrical activity and/or the information related to the electrical activity is created. Exemplary maps include a time difference between action potentials at a roving electrode and a reference electrode, the peak-to-peak timing of action potentials at the roving electrode, the peak negative voltage of action potentials at the roving electrode, complex fractionated electrogram information, a dominant frequency of an electrogram signal, a maximum peak amplitude at the dominant frequency, a ratio of energy in one band of the frequency-domain to the energy in a second band of the frequency-domain, a low-frequency or high-frequency passband of interest, a frequency with the maximum energy in a passband, a number of peaks within a passband, an energy, power, and/or area in each peak, a ratio of energy and/or area in each peak to that in another passband, and a width of each peak in a spectrum. Colors, shades of colors, and/or grayscales are assigned to values of the parameters and colors corresponding to the parameters for the electrograms sampled by the electrodes are updated on the three-dimensional model.

    Abstract translation: 电生理学装置用于测量在患者心脏中发生的电活动并且可视化与电活动有关的电活动和/或信息。 创建电活动的三维图和/或与电活动相关的信息。 示例性地图包括粗纱电极上的动作电位和参考电极之间的时间差，粗纱动作电位的峰 - 峰定时，粗纱动作电位的峰值负电压，复分数电描记图信息， 电描记信号的主要频率，主频率的最大峰值幅度，频域的一个频带中的能量与频域的第二频带中的能量的比率，低频或高频 通带的通带，通带中的最大能量的频率，通带内的峰值数，每个峰中的能量，功率和/或面积，每个峰中的能量和/或面积与另一峰中的峰的比率 通带和频谱中每个峰的宽度。 将颜色，色调和/或灰度等级分配给参数的值，并且对应于由电极采集的电描记图的参数对应的颜色在三维模型上更新。

    Contact-sensitive pressure-sensitive conductive composite electrode and method for ablation
    6.
    发明授权
    Contact-sensitive pressure-sensitive conductive composite electrode and method for ablation 有权
    接触敏感的压敏导电复合电极及其消融方法

    公开(公告)号：US07883508B2

    公开(公告)日：2011-02-08

    申请号：US11647294

    申请日：2006-12-29

    Applicant: Chou Thao ,  Saurav Paul ,  Kedar Ravindra Belhe ,  Hong Cao

    Inventor： Chou Thao ,  Saurav Paul ,  Kedar Ravindra Belhe ,  Hong Cao

    IPC: A61B18/18

    CPC classification number: A61B18/1492 ,  A61B2018/00577 ,  A61B2018/00702 ,  A61B2090/064

    Abstract: A catheter assembly for pressure-sensitive control of ablation treatment is disclosed. The assembly includes a conductive element, an electrode, and a pressure sensitive conductive composite member positioned between the conductive element and the electrode. At least one of the conductive pin, the pressure sensitive conductive composite element and the ablation electrode are moveable to create an engagement position and a non-engagement position. In the engagement position, the elements are electrically coupled such that ablation energy may be delivered from the conductive pin to the ablation electrode via the pressure sensitive conductive composite element. In the non-engagement position, the elements are electrically decoupled such that ablation energy is not delivered to the ablation electrode. A related method for pressure-sensitive control of ablation is also disclosed.

    Abstract translation: 公开了一种用于消融治疗的压敏控制的导管组件。 组件包括导电元件，电极和位于导电元件和电极之间的压敏导电复合元件。 导电针，压敏导电复合元件和消融电极中的至少一个可移动以产生接合位置和非接合位置。 在接合位置，元件被电耦合，使得消融能量可以经由压敏导电复合元件从导电引脚传送到消融电极。 在非接合位置，元件被电去耦合，使得消融能量不被输送到消融电极。 还公开了一种用于消融的压敏控制的相关方法。

    Brush electrode and method for ablation
    7.
    发明授权
    Brush electrode and method for ablation 有权

    公开(公告)号：US07326204B2

    公开(公告)日：2008-02-05

    申请号：US10808919

    申请日：2004-03-24

    Applicant: Saurav Paul ,  Kedar Ravindra Belhe ,  Hong Cao ,  Chou Thao

    Inventor： Saurav Paul ,  Kedar Ravindra Belhe ,  Hong Cao ,  Chou Thao

    IPC: A61B18/18

    CPC classification number: A61B18/1402 ,  A61B2018/143 ,  A61B2018/1472

    Abstract: A brush electrode and a method for using the brush electrode for tissue ablation are disclosed. The brush electrode comprises a plurality of flexible filaments or bristles for applying ablative energy (e.g., RF energy) to target tissue during the formation of spot or continuous linear lesions. Interstitial spaces are defined among the filaments of the brush electrode, and the interstitial spaces are adapted to direct conductive or nonconductive fluid, when present, toward the distal ends of the brush filaments. The brush electrode facilitates electrode-tissue contact in target tissue having flat or contoured surfaces. The flexible filaments may be selectively trimmed to give a desired tip configuration or a desired standoff distance between the tissue and the conductive filaments in the brush electrode. Also, the filaments may be grouped into clusters. A shielded-tip brush electrode, including a flexible boot, is also disclosed.

    Curved ablation catheter
    10.
    发明授权
    Curved ablation catheter 有权
    弯曲消融导管

    公开(公告)号：US08486062B2

    公开(公告)日：2013-07-16

    申请号：US11550302

    申请日：2006-10-17

    Applicant: Kedar Ravindra Belhe ,  Saurav Paul ,  Hong Cao ,  John Avi Roop

    Inventor： Kedar Ravindra Belhe ,  Saurav Paul ,  Hong Cao ,  John Avi Roop

    IPC: A61B18/14

    CPC classification number: A61B18/1492 ,  A61B2018/00351 ,  A61B2018/143 ,  A61B2018/1475 ,  A61B2018/1497

    Abstract: 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.

    Abstract translation: 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。

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