Wearable cardioverter defibrillator (WCD) system with active ECG cable shielding

    公开(公告)号:US12128244B2

    公开(公告)日:2024-10-29

    申请号:US17540217

    申请日:2021-12-01

    Abstract: Embodiments of a wearable cardioverter defibrillator (WCD) system are configured to monitor a patient's ECG for shockable arrhythmias and deliver a shock to the patient in response to such a detection. To monitor the patient's ECG with reduced signal noise to improve the system's performance, the system includes a cable assembly having: a signal line; an inner shield and an outer shield; an ECG electrode electrically connected to the signal line of the cable assembly; and an amplifier having first and second input nodes respectively connected to the signal line and the outer shield of the cable assembly. The amplifier's output node is electrically connected to the inner shield of the cable assembly to reduce the reactive load seen by the patient's heart in driving the ECG sensing circuitry, which reduces the noise on the ECG signal outputted by the amplifier.

    WCD user interface response to a change in device orientation

    公开(公告)号:US12115378B2

    公开(公告)日:2024-10-15

    申请号:US17717322

    申请日:2022-04-11

    Abstract: In one embodiment, a wearable cardioverter defibrillator (WCD) is described. The WCD includes a support structure worn by a patient. A processor is coupled to the support structure. The WCD also includes a discharge circuit coupled to an energy storage module, the discharge circuit configured to discharge the stored electrical charge through a body of the patient. The wearable cardioverter defibrillator also includes a user interface housing at least one sensor and responsive to changes in device orientation. The processor is configured to detect a motion at the user interface and determine when the motion is patient-activated. When the motion is patient-activated, the processor determines a direction of rotation. The processor determines an orientation of a display at the user interface based on the direction of rotation and orients the display at the user interface to appear upright to the patient.

    ELECTRODE ATTACHMENT IN WEARABLE CARDIAC DEVICES

    公开(公告)号:US20240238604A1

    公开(公告)日:2024-07-18

    申请号:US18413819

    申请日:2024-01-16

    Abstract: Ambulatory cardiac devices for providing comfortable, long-term continuous cardiac monitoring and treatment for arrythmia conditions. Examples of a device include sensing electrodes configured to detect ECG signals of an ambulatory patient, a garment configured to be worn about the patient's thorax, and sensing electrode receptacles configured to dispose, via the garment, the sensing electrodes at predetermined anatomical locations on the patient's thorax, and maintain, via the garment, contact between the sensing electrodes and the predetermined anatomical locations despite movement of the patient's thorax. In examples, each sensing electrode receptacle forms an opening in the garment and includes a securement device configured to allow for removable installation of a sensing electrode, a lock configured to inhibit movement of the sensing electrode separate from the sensing electrode receptacle, and a guide configured to align the sensing electrode with one of the predetermined anatomical locations of the patient's thorax through the opening.

    WCD PACING PULSE GENERATION
    9.
    发明公开

    公开(公告)号:US20240139531A1

    公开(公告)日:2024-05-02

    申请号:US18446391

    申请日:2023-08-08

    CPC classification number: A61N1/3912 A61N1/3904 A61N1/3937 A61N1/3987

    Abstract: Apparatus and methods for generating pulse pacing in a wearable cardioverter defibrillator (“WCD”). In one aspect the WCD circuitry includes a power source such as a battery coupled to a charger that provides charge energy to an energy storage module. Control circuitry is operatively coupled to the charger and the output circuitry, and configured to cause the WCD circuitry to generate pacing pulses delivered to therapy electrodes (attached to an ambulatory patient) without a current source. The WCD circuitry includes one or more processing elements that are used to execute instructions provided by one or more software modules that are configured to support various functionality, including controlling generation of pacing pulses.

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