公开(公告)号：US12048594B2

公开(公告)日：2024-07-30

申请号：US17180947

申请日：2021-02-22

Applicant: Navix International Limited

Inventor： Yitzhack Schwartz ,  Eli Dichterman ,  Adi Rabinovich

IPC: A61B18/14 ,  A61B5/00 ,  A61B5/0538 ,  A61B5/06 ,  A61B34/10 ,  A61B34/20 ,  A61B90/00 ,  G06F30/00 ,  G06F30/20 ,  G16H10/60 ,  G16H30/20 ,  G16H50/50 ,  A61B17/00 ,  A61B18/00 ,  A61M25/01 ,  G01H17/00 ,  G06F17/18 ,  H02K7/18

CPC classification number: A61B90/06 ,  A61B5/0538 ,  A61B5/063 ,  A61B5/6833 ,  A61B18/1492 ,  A61B34/10 ,  A61B34/20 ,  A61B90/37 ,  G06F30/00 ,  G06F30/20 ,  G16H10/60 ,  G16H30/20 ,  G16H50/50 ,  A61B2017/00026 ,  A61B2018/00357 ,  A61B2018/00494 ,  A61B2018/00577 ,  A61B2018/00642 ,  A61B2018/00654 ,  A61B2018/00702 ,  A61B2018/00732 ,  A61B2018/00738 ,  A61B2018/00761 ,  A61B2018/00791 ,  A61B2018/00875 ,  A61B2018/00904 ,  A61B2034/104 ,  A61B2034/105 ,  A61B2034/107 ,  A61B2034/2046 ,  A61B2034/2053 ,  A61B2090/065 ,  A61B2090/365 ,  A61B2090/374 ,  A61B2090/3762 ,  A61B90/39 ,  A61B2090/3983 ,  A61M2025/0166 ,  G01H17/00 ,  G06F17/18 ,  H02J2203/20 ,  H02K7/1823

Abstract: Devices and methods for assessing tissue contact based on dielectric properties and/or impedance sensing are disclosed. In some embodiments, one or more probing frequencies are delivered via electrodes including an electrode in proximity to a tissue (for example, myocardial tissue). In some embodiments, dielectric parameter values, optionally together with other known and/or estimated tissue characteristics, are measured to determine a contact quality with the tissue. In some embodiments, dielectric contact quality is used, for example, in guiding the formation of a lesion (for example, RF ablation of heart tissue to alter electrical transmission characteristics).

公开(公告)号：US12042264B2

公开(公告)日：2024-07-23

申请号：US17884758

申请日：2022-08-10

Applicant: St. Jude Medical, Cardiology Division, Inc.

Inventor： Timothy G. Curran

IPC: A61B5/06 ,  A61B5/00 ,  A61B5/053 ,  A61B5/0538 ,  A61B5/282 ,  A61B18/00 ,  A61B18/12 ,  A61B18/14 ,  A61B34/20

CPC classification number: A61B5/063 ,  A61B5/053 ,  A61B5/0538 ,  A61B5/282 ,  A61B5/6852 ,  A61B5/6856 ,  A61B5/7225 ,  A61B18/1492 ,  A61B34/20 ,  A61B5/068 ,  A61B5/7221 ,  A61B2018/0016 ,  A61B2018/00267 ,  A61B2018/00351 ,  A61B2018/00577 ,  A61B2018/00839 ,  A61B2018/00845 ,  A61B2018/00875 ,  A61B2018/00892 ,  A61B2018/128 ,  A61B2018/1435 ,  A61B2034/2053 ,  A61B2562/0209

Abstract: The present disclosure is directed to measuring impedance across a plurality of electrode pairs. The disclosed systems and methods may simultaneously provide drive signals between electrode pairs and then sense the voltage signals that develop at the electrodes. Digital signal processing may be used to synchronously demodulate the voltage signal at each electrode to determine impedances at the electrodes. Each electrode pair may be driven at a unique frequency to allow for significantly increasing a number of electrode pairs and/or increasing drive current magnitudes. Synchronous demodulation allows the unique frequencies to be detected independent of each other while minimizing crosstalk. Typically, the drive frequencies are made orthogonal by setting the drive frequencies at harmonics of a common base frequency and measuring a response over an integer number of cycles. In an embodiment, quadrature demodulation may occur providing a real component for resistive impedance and an imaginary component for reactive impedance.

公开(公告)号：US11938313B2

公开(公告)日：2024-03-26

申请号：US17452416

申请日：2021-10-27

Applicant: Cadwell Laboratories, Inc.

Inventor： John A. Cadwell

IPC: A61N1/05 ,  A61B5/06 ,  A61B5/279 ,  A61B5/293 ,  A61N1/372 ,  A61B1/313 ,  A61N1/36

CPC classification number: A61N1/0539 ,  A61B5/063 ,  A61B5/279 ,  A61B5/293 ,  A61N1/0531 ,  A61N1/37205 ,  A61B1/313 ,  A61B2562/046 ,  A61N1/36064

Abstract: A system for deploying an electrode array at a target location through a hole formed in the patient's cranium. The system includes an array of electrodes attached to a substrate and an inserter attached to the substrate and/or the array of electrodes. The inserter, substrate and array of electrodes are configured into a first compressed state and are positioned within the lumen of a cannula. Using the cannula, the system is inserted through the hole, the cannula is then removed, and the inserter is used to transition the substrate and electrode array from the first compressed state to a second uncompressed state, thereby deploying the array of electrodes at the target location.

公开(公告)号：US11806126B2

公开(公告)日：2023-11-07

申请号：US16612385

申请日：2018-05-10

Applicant: Navix International Limited

Inventor： Shlomo Ben-Haim ,  Yitzhack Schwartz ,  Zalman Ibragimov

IPC: A61B5/06 ,  A61B34/20 ,  A61B34/00 ,  G06N20/00 ,  A61B5/0538 ,  A61B5/00 ,  A61B18/02 ,  A61B18/14 ,  A61B18/00

CPC classification number: A61B5/063 ,  A61B5/0538 ,  A61B5/6853 ,  A61B18/02 ,  A61B18/1477 ,  A61B34/20 ,  A61B34/25 ,  G06N20/00 ,  A61B2018/0022 ,  A61B2018/00357 ,  A61B2018/00375 ,  A61B2018/00577 ,  A61B2018/0212 ,  A61B2034/2046

Abstract: Methods and systems for position determination of an intrabody probe, targets of an intrabody probe, and or actions to be performed using an intrabody probe are described. In some embodiments, an anatomy being navigated and/or mapped is described by a rule-based schema relating different anatomically identified structures to one another according to their ability to help identify and/or locate one another. Additionally, in some embodiments, data recorded from the intrabody probe is processed according to schema rules in order to provide anatomical identification of the anatomical region which the intrabody probe is sampling, optionally without performing detailed mapping, and/or prior to the availability of detailed mapping of anatomical geometry.

公开(公告)号：US11730395B2

公开(公告)日：2023-08-22

申请号：US16639610

申请日：2018-07-18

Applicant: Navix International Limited

Inventor： Eli Dichterman ,  Shlomo Ben-Haim

IPC: A61B5/107 ,  A61B5/06 ,  A61B5/00 ,  A61B5/02 ,  G16H50/50 ,  G16H40/63

CPC classification number: A61B5/1076 ,  A61B5/02028 ,  A61B5/062 ,  A61B5/063 ,  A61B5/1075 ,  A61B5/4836 ,  A61B5/6852 ,  G16H40/63 ,  G16H50/50

Abstract: A method of reconstructing a shape of a volume of a part of a subject based on intrabody measurements of a plurality of crossing electromagnetic fields established within the volume, the method including:



receiving, by computer circuitry, measurements of the crossing electromagnetic fields carried out using at least one sensor carried on an intrabody probe, the measuring being carried out with the probe at multiple locations in the volume, to provide a set of measurement samples, each taken at a location;
generating, by computer circuitry and based on said measurement samples, a transformation that transforms measurement samples to geometric positions;
transforming, using said generated transformation fewer than half of the measurements in said set of measurement samples into a set of geometric positions; and
reconstructing the shape of said volume from said set of geometric positions.

公开(公告)号：US20230240577A1

公开(公告)日：2023-08-03

申请号：US18189323

申请日：2023-03-24

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

Inventor： John A. Hauck

IPC: A61B5/24 ,  A61B5/06 ,  A61B5/00 ,  A61B18/14 ,  A61B5/0538 ,  A61B90/00

CPC classification number: A61B5/24 ,  A61B5/063 ,  A61B5/0538 ,  A61B5/6843 ,  A61B5/6857 ,  A61B5/6885 ,  A61B18/1492 ,  A61B90/06 ,  A61B2018/00875

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.

公开(公告)号：US11666242B2

公开(公告)日：2023-06-06

申请号：US16787828

申请日：2020-02-11

Applicant: CARDIOINSIGHT TECHNOLOGIES, INC.

Inventor： Ping Jia ,  Qingguo Zeng ,  Charulatha Ramanathan ,  Ryan Bokan

IPC: A61B5/06 ,  A61B5/053 ,  A61B5/0538

CPC classification number: A61B5/063 ,  A61B5/053 ,  A61B5/0538 ,  A61B2560/0223 ,  A61B2560/0276

Abstract: An example method includes applying a localization signal to a source electrode positioned within a conductive volume and a ground electrode at a known location. Electrical activity is sensed at a plurality of sensor electrodes distributed across an outer surface of the conductive volume. The locations of each of the sensor electrodes and the location of the ground electrode being stored in memory as part of geometry data. The electrical activity sensed at each of the sensor electrodes is stored in the memory as electrical measurement data. The method also includes computing a location of the source electrode by minimizing a difference between respective pairs of source voltages determined for the plurality of sensor electrodes. The source voltage for each of the sensor electrodes is determined based on the electrical measurement data and the geometry data.

公开(公告)号：US20190246945A1

公开(公告)日：2019-08-15

申请号：US16394861

申请日：2019-04-25

Applicant: Bard Access Systems, Inc.

Inventor： Sorin Grunwald

IPC: A61B5/06 ,  A61B5/0456 ,  A61B5/04 ,  A61B5/042 ,  A61B5/0452 ,  A61B5/00 ,  A61M25/09 ,  A61B5/0408 ,  A61B5/044 ,  A61M25/01 ,  A61M25/00

CPC classification number: A61B5/063 ,  A61B5/0006 ,  A61B5/04017 ,  A61B5/0408 ,  A61B5/042 ,  A61B5/044 ,  A61B5/0452 ,  A61B5/0456 ,  A61B5/06 ,  A61B5/7203 ,  A61B2034/2046 ,  A61B2034/2053 ,  A61M25/0026 ,  A61M25/003 ,  A61M25/0102 ,  A61M25/0147 ,  A61M25/0194 ,  A61M25/09 ,  A61M2025/0166 ,  A61M2025/09116

Abstract: Devices and methods obtain and use endovascular electrograms (or electrocardiograms/ECGs) in a number of clinical applications and settings. In one embodiment, a method for locating an indwelling medical device within a vasculature of a patient includes identifying a P-wave segment in an endovascular ECG signal associated with the indwelling medical device, then calculating a positive energy value relating to an amount of energy of the P-wave segment above a baseline of the endovascular ECG signal and a negative energy value relating to an amount of energy of the P-wave segment below a baseline of the endovascular ECG signal. A position of the medical device within the vasculature can be determined using at least one of the positive energy value and the negative energy value in a graphical user interface.

公开(公告)号：US20190239764A1

公开(公告)日：2019-08-08

申请号：US16270483

申请日：2019-02-07

Applicant: Boston Scientific Scimed Inc.

Inventor： Matthew S. Sulkin ,  Allan C. Shuros

IPC: A61B5/042 ,  A61B18/14 ,  A61B5/00 ,  A61B5/06

CPC classification number: A61B5/042 ,  A61B5/0044 ,  A61B5/0422 ,  A61B5/044 ,  A61B5/0538 ,  A61B5/062 ,  A61B5/063 ,  A61B5/065 ,  A61B5/489 ,  A61B5/6852 ,  A61B5/7425 ,  A61B5/743 ,  A61B18/1492 ,  A61B2017/00243 ,  A61B2018/00214 ,  A61B2018/00351 ,  A61B2018/00577 ,  A61B2018/00839 ,  A61B2034/2051 ,  A61B2034/2053 ,  A61B2034/2072 ,  A61B2562/0209 ,  A61B2576/023

Abstract: A system includes a display device configured to present an epicardial vascular map. The system also includes a processing unit configured to: receive electrical signals obtained from a vascular mapping catheter and/or a magnetically tracked catheter; determine, from the electrical signals, a plurality of impedance measurements associated with one or more electrodes of the vascular mapping catheter; access a field map, the field map having expected impedance measurements determined based on determined positions of the one or more additional electrodes of the magnetically tracked catheter; determine, based on the plurality of impedance measurements and the field map, positions of the electrodes of the vascular mapping catheter; generate, based on the positions, the epicardial vascular structure; access the epicardial cardiac map; annotate the epicardial cardiac map with the representation of the epicardial vascular structure to generate the epicardial vascular map; and facilitate display of the epicardial vascular map.

公开(公告)号：US20190159861A1

公开(公告)日：2019-05-30

申请号：US15822380

申请日：2017-11-27

Applicant: Biosense Webster (Israel) Ltd.

Inventor： Assaf Cohen ,  Fady Massarwi ,  Ido Ilan ,  Itai Doron

IPC: A61B90/00 ,  G06T17/00 ,  G06T19/20 ,  A61B34/10

CPC classification number: A61B90/37 ,  A61B5/042 ,  A61B5/062 ,  A61B5/063 ,  A61B34/10 ,  A61B2017/00053 ,  A61B2017/00199 ,  A61B2034/105 ,  G06T11/40 ,  G06T17/00 ,  G06T19/20 ,  G06T2210/41 ,  G06T2219/2004

Abstract: Methods, computing systems and computer software products implement embodiments of the present invention that include receiving, by a processor, respective coordinates for multiple points on a surface, and rendering an image of the surface on a display screen. For each given point among the multiple points, a density of the points within a region surrounding the given point is computed, and the given point on the surface with a point size that is inversely related to the computed density is rendered on the display screen.