Impedance-based far-field subtraction of waveform using non-tissue contacting electrodes

    公开(公告)号:US10827978B2

    公开(公告)日:2020-11-10

    申请号:US16111385

    申请日:2018-08-24

    Abstract: A medical system for removing far-field signals from a unipolar electrical signal is disclosed. In embodiments, the medical system comprises a catheter and a processing device communicatively coupled to the catheter. The catheter comprises a plurality of electrodes configured to sense a plurality of unipolar signals transmitted through tissue. The processing device is configured to: receive the sensed unipolar electrical signals, determine an electrode having a high level of contact with the tissue, and determine an electrode having a lower level of contact with the tissue than the electrode having the high level of contact with the tissue. Further, the processing device is configured to determine a sensed near-field electrical signal based on the unipolar electrical signal received from the electrode having the high level of contact and the unipolar electrical signal received from the electrode having the lower level of contact.

    SHEATH DETECTION USING LOCAL IMPEDANCE INFORMATION

    公开(公告)号:US20200155228A1

    公开(公告)日:2020-05-21

    申请号:US16686591

    申请日:2019-11-18

    Abstract: A medical system including a catheter, a sheath, and a controller. The catheter having a catheter distal end that includes multiple electrodes, the sheath configured to receive the catheter and having a sheath distal end configured to cover one or more of the multiple electrodes, and the controller configured to supply a current between electrodes of the multiple electrodes and to measure voltages from at least two of the multiple electrodes to determine whether one or more of the multiple electrodes is covered by the sheath.

    IMPEDANCE-BASED FAR-FIELD SUBTRACTION OF WAVEFORM USING NON-TISSUE CONTACTING ELECTRODES

    公开(公告)号:US20190150842A1

    公开(公告)日:2019-05-23

    申请号:US16111385

    申请日:2018-08-24

    Abstract: A medical system for removing far-field signals from a unipolar electrical signal is disclosed. In embodiments, the medical system comprises a catheter and a processing device communicatively coupled to the catheter. The catheter comprises a plurality of electrodes configured to sense a plurality of unipolar signals transmitted through tissue. The processing device is configured to: receive the sensed unipolar electrical signals, determine an electrode having a high level of contact with the tissue, and determine an electrode having a lower level of contact with the tissue than the electrode having the high level of contact with the tissue. Further, the processing device is configured to determine a sensed near-field electrical signal based on the unipolar electrical signal received from the electrode having the high level of contact and the unipolar electrical signal received from the electrode having the lower level of contact.

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