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    Cardiac tissue elasticity sensing
    21.
    发明授权
    Cardiac tissue elasticity sensing 有权

    公开(公告)号：US10154875B2

    公开(公告)日：2018-12-18

    申请号：US15457378

    申请日：2017-03-13

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

    Inventor： John A. Hauck

    IPC: A61B18/12 ,  A61B5/00 ,  A61B5/103 ,  A61B5/02 ,  A61B18/14 ,  A61B34/20 ,  A61B90/00

    Abstract: A system and method are provided for assessing the compliance of internal patient tissue for purposes of catheter guidance and/or ablation procedures. Specifically, the system/method provides for probing internal patient tissue in order to obtain force and/or tissue displacement measurements. These measurements are utilized to generate an indication of tissue elasticity. In one exemplary embodiment, the indication of elasticity is correlated with an image of the internal tissue area and an output of this image including elasticity indications is displayed for a user.

    Robotic catheter system with dynamic response
    24.
    发明授权
    Robotic catheter system with dynamic response 有权
    机器人导管系统具有动态响应

    公开(公告)号：US09295527B2

    公开(公告)日：2016-03-29

    申请号：US14151266

    申请日：2014-01-09

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

    Inventor： Mark B. Kirschenman ,  John A. Hauck ,  Andrew P. Skypeck

    IPC: A61M31/00 ,  A61M37/00 ,  A61B19/00 ,  A61M25/00

    CPC classification number: A61B34/35 ,  A61B34/30 ,  A61B34/71 ,  A61B90/10 ,  A61B2034/301 ,  A61B2090/064 ,  A61M25/0067

    Abstract: An apparatus for maintaining a robotic catheter system in a responsive state includes a catheter, a plurality of linear translatable control elements, and a controller. In an embodiment, the catheter includes a proximal portion, a distal portion, and at least two steering wires. The steering wires may be configured at one end to control the movement of at least a portion of the distal portion of the catheter and at the other end for connection to a control member. In an embodiment, each control element may be configured to engage or interface with a respective control member, and the controller may be configured to measure a force exerted on at least one control member by a respective control element and further configured to linearly translate the control element to substantially maintain a force within a predetermined range.

    Abstract translation: 用于将机器人导管系统维持在响应状态的装置包括导管，多个线性可平移控制元件和控制器。 在一个实施例中，导管包括近端部分，远侧部分和至少两个操纵线。 操纵线可以被配置在一端以控制导管远端部分的至少一部分的移动，另一端用于连接到控制构件。 在一个实施例中，每个控制元件可以被配置为与相应的控制构件接合或接合，并且控制器可以被配置成测量由相应的控制元件施加在至少一个控制构件上的力，并进一步被配置成线性地平移控制 以将力保持在预定范围内。

    Dynamic adaptive respiration compensation with automatic gain control
    25.
    发明申请
    Dynamic adaptive respiration compensation with automatic gain control 审中-公开

    公开(公告)号：US20150366512A1

    公开(公告)日：2015-12-24

    申请号：US14800910

    申请日：2015-07-16

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

    Inventor： Lev A. Koyrakh ,  Eric J. Voth ,  John A. Hauck ,  Jeffrey A. Schweitzer

    IPC: A61B5/00 ,  A61B5/06

    Abstract: A system for determining a location of an electrode of a medical device (e.g., a catheter) in a body of a patient includes a localization block for producing an uncompensated electrode location, a motion compensation block for producing a compensation signal (i.e., for respiration, cardiac, etc.), and a mechanism for subtracting the compensation signal from the uncompensated electrode location. The result is a corrected electrode location substantially free of respiration and cardiac artifacts. The motion compensation block includes a dynamic adaptation feature which accounts for changes in a patient's respiration patterns as well as intentional movements of the medical device to different locations within the patient's body. The system further includes an automatic compensation gain control which suppresses compensation when certain conditions, such as noise or sudden patch impedance changes, are detected.

    CORRECTION OF SHIFT AND DRIFT IN IMPEDANCE-BASED MEDICAL DEVICE NAVIGATION USING MEASURED IMPEDANCES AT EXTERNAL PATCH ELECTRODES
    27.
    发明申请
    CORRECTION OF SHIFT AND DRIFT IN IMPEDANCE-BASED MEDICAL DEVICE NAVIGATION USING MEASURED IMPEDANCES AT EXTERNAL PATCH ELECTRODES 有权
    使用外部贴片电极测量的阻抗进行基于阻抗的医疗设备导航中的移位和移位校正

    公开(公告)号：US20150005624A1

    公开(公告)日：2015-01-01

    申请号：US14471730

    申请日：2014-08-28

    Applicant: St. Jude Medical, Atrial Fibrillation Division Inc

    Inventor： John A. Hauck ,  Jeffery A. Schweitzer ,  Lev A. Koyrakh

    IPC: A61B5/06 ,  A61B5/00

    CPC classification number: A61B5/063 ,  A61B5/053 ,  A61B5/6801 ,  A61B5/742

    Abstract: A system and method are provided for determining characteristics of a device electrode disposed on a medical device within a body. A plurality of measurement electrodes are coupled to an external surface of the body and establish transmission paths for current through the body. An electronic control unit (ECU) is configured to cause transmission of current between a pair of active electrodes selected from the measurement electrodes and thereby generate a voltage on the device electrode. The ECU receives impedance signals from a plurality of passive electrodes among the measurement electrodes other than the active electrodes. The ECU establishes a virtual reference electrode at a reference position within the body responsive to the impedance signals and computes a position of the device responsive to the voltage on the device electrode and the reference position of the reference electrode. The ECU may also compute impedances at the device and measurement electrodes.

    Abstract translation: 提供了一种用于确定设置在身体内的医疗装置上的装置电极的特性的系统和方法。 多个测量电极耦合到身体的外表面并建立用于通过身体的电流的传输路径。 电子控制单元（ECU）被配置为在从测量电极中选择的一对有源电极之间引起电流的传输，从而在器件电极上产生电压。 ECU从除了有源电极之外的测量电极中的多个无源电极接收阻抗信号。 ECU根据阻抗信号在主体内的参考位置建立虚拟参考电极，并根据器件电极上的电压和参考电极的参考位置计算器件的位置。 ECU还可以计算设备和测量电极处的阻抗。

    Cardiac navigation system including electrode array for use therewith
    28.
    发明授权
    Cardiac navigation system including electrode array for use therewith 有权

    公开(公告)号：US08788011B2

    公开(公告)日：2014-07-22

    申请号：US13934505

    申请日：2013-07-03

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

    Inventor： John A. Hauck ,  James C. Baker

    IPC: A61B5/04

    CPC classification number: A61B5/042 ,  A61B5/1076

    Abstract: A cardiac navigation system including a mapping catheter, a control system coupled to the mapping catheter, an electrode array, and means for driving an electrical current across the electrode array. The mapping catheter includes means for sensing an electrical field. The control system includes means for receiving sensed signals from the mapping catheter. The cardiac navigation system includes at least one electrode array including means for providing an electrical field across three axes. The three axes are approximately orthogonal with respect to one another. The means for driving an electrical current across the three axes includes means for providing a plurality of individual current sources to the electrode array. As such, the cardiac navigation system presented provides a more uniform sheet of current across an area of interest, the mapping catheter senses the electrical field across the area of interest, and the control system determines a three-dimensional location of the mapping catheter based on the sensed electrical field.

    Navigational Reference Dislodgement Detection Method and System
    29.
    发明申请
    Navigational Reference Dislodgement Detection Method and System 审中-公开

    公开(公告)号：US20200289003A1

    公开(公告)日：2020-09-17

    申请号：US16874344

    申请日：2020-05-14

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

    Inventor： John A. Hauck

    IPC: A61B5/042 ,  A61B5/00 ,  A61B34/20 ,  A61B5/06

    Abstract: A method of tracking a position of a catheter within a patient includes securing a navigational reference at a reference location within the patient, defining the reference location as the origin of a coordinate system, determining a location of an electrode moving within the patient relative to that coordinate system, monitoring for a dislodgement of the navigational reference from the initial reference location, for example by measuring the navigational reference relative to a far field reference outside the patient's body, and generating a signal indicating that the navigational reference has dislodged from the reference location. Upon dislodgement, a user may be provided with guidance to help reposition and secure the navigational reference to the initial reference location, or the navigational reference may be automatically repositioned and secured to the initial reference location. Alternatively, a reference adjustment may be calculated to compensate for the changed reference point/origin.

    Multi-electrode impedance sensing
    30.
    发明授权
    Multi-electrode impedance sensing 有权

    公开(公告)号：US10368760B2

    公开(公告)日：2019-08-06

    申请号：US14301923

    申请日：2014-06-11

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

    Inventor： John A. Hauck

    IPC: A61B5/04 ,  A61B18/14 ,  A61B5/06 ,  A61B5/00 ,  A61B5/053 ,  A61B90/00 ,  A61B18/00

    Abstract: A system and method for assessing contact between a medical device and tissue may comprise an electronic control unit (ECU) configured to be coupled to a medical device, the medical device comprising a first electrode and a second electrode. The ECU may be further configured to select the first electrode as an electrical source and the second electrode as an electrical sink, to cause an electrical signal to be driven between the source and sink, to detect respective electric potentials on the first electrode and the second electrode while the electrical signal is driven, and to determine an impedance respective of one of the first electrode and the second electrode according to both of the respective electric potentials.

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