SYSTEMS AND METHODS FOR MONITORING ELECTRODE TISSUE ENGAGEMENT DURING ABLATION

    公开(公告)号:US20250152231A1

    公开(公告)日:2025-05-15

    申请号:US18919427

    申请日:2024-10-18

    Inventor: William Winstrom

    Abstract: An ablation system and method are provided. The ablation system includes an ablation power generator configured to generate ablation energy. An active electrode is coupled to the ablation power generator and is configured to deliver the ablation energy to ablation tissue of interest during an ablation procedure. A return electrode arrangement (REA) is coupled to the ablation power generator and is configured to engage remote tissue, at a remote location from the ablation tissue of interest, to provide a return path during the ablation procedure. The REA transitions between an engaged and disengaged state with the remote tissue. An electrode-tissue engagement (ETE) circuit includes a resonant circuit coupled to the REA. The ETE circuit is configured to detect when the REA is in the engaged state or disengaged state.

    Systems and methods for detecting leakage currents in high-frequency ablation systems

    公开(公告)号:US12256986B2

    公开(公告)日:2025-03-25

    申请号:US17378597

    申请日:2021-07-16

    Abstract: The present disclosure provides systems and methods for detecting leakage currents in radio-frequency (RF) ablation systems. An RF generator may be configured to disable an electrical return path from a patient to a ground terminal. The RF generator may also be configured to apply an electrical signal to an electrode that is positioned to be in proximity to target tissue of the patient. The RF generator may be further configured to measure a leakage impedance while the electrical return path is disabled and the electrical signal is applied to the electrode. The RF generator may also be configured to control RF ablation therapy based, at least in part, on the measured leakage impedance. Other features are also claimed and described.

    Implantable pulse generator with multiple stimulation engines

    公开(公告)号:US11931584B2

    公开(公告)日:2024-03-19

    申请号:US17460227

    申请日:2021-08-29

    CPC classification number: A61N1/36153 A61N1/3606 A61N1/37235 A61N1/378

    Abstract: An implantable medical device (IMD) includes multiple stimulation engines for independently stimulating respective electrode sets of a lead system while avoiding collisions and/or channel contention during stimulation delivery. A first voltage multiplier is configured to generate an adjustable target voltage having sufficient headroom at an output node that is commonly coupled to anodic nodes of respective stimulation engines. Each stimulation engine includes a secondary voltage multiplier to drive the respective anode and a current regulator powered by a floating voltage supply, wherein the current regulator is coupled to a cathodic node and configured to control how much stimulation current is pulled from the patient tissue.

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