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OwnerMihir Naware, Cecilia Qin Xiinventors
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Techniques are provided for detecting problems involving electrode/tissue contact with extracardiac electrodes of subcutaneous monitoring devices, such as atrial fibrillation (AF) monitors. Briefly, subcutaneous impedance signals are detected using extracardiac sensing electrodes of the subcutaneous device. Problems involving poor electrode/tissue contact are then detected within the subcutaneous impedance signals. Depending upon its programming, the device can then inhibit the recording of subcutaneous electrocardiogram (ECG) data during periods of poor contact. Additionally, the device can identify the particular contact problem based on the impedance signals. In one example, the device identifies one or more of: acute instability of impedance indicative of intermittent electrode/tissue contact; impedance signal saturation indicative of loss of electrode/tissue contact; and impedance signal dropout indicative of the presence of liquids surrounding the electrodes (such as blood or edema accumulation.) Techniques for programming various modes of operation of the subcutaneous device are also provided.
A method for use with an implantable subcutaneous medical device for subcutaneous implant within a patient wherein the device employs extracardiac sensing electrodes for contact with patient tissue, the method comprising:
A system for use with an implantable subcutaneous medical device for subcutaneous implant within a patient wherein the device employs extracardiac sensing electrodes for contact with patient tissue, the system comprising:
A system for use with an implantable subcutaneous medical device for subcutaneous implant within a patient wherein the device employs extracardiac sensing electrodes for contact with patient tissue, the system comprising:
Dependencies are inferred from the claim text.