Subcutaneous cardiac sensing and stimulation system employing blood sensor
First Claim
1. An implantable subcutaneous device, comprising:
- a housing configured for subcutaneous non-intrathoracic placement;
detection circuitry provided in the housing and configured to produce a cardiac electrophysiologic signal;
energy delivery circuitry provided in the housing;
at least one electrode configured for subcutaneous non-intrathoracic placement and coupled to the detection and energy delivery circuitry;
an implantable blood sensor configured to produce a blood sensor signal; and
a processor provided in the housing and coupled to the blood sensor and the detection and energy delivery circuitry, the processor configured to use the blood sensor signal to verify that the cardiac electrophysiologic signal comprises a cardiac signal, and configured to evaluate a cardiac rhythm using the blood sensor signal and the cardiac electrophysiologic signal comprising the cardiac signal.
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Accused Products
Abstract
Cardiac systems and methods using ECG and blood information for arrhythmia detection and discrimination. Detection circuitry is configured to produce an ECG. An implantable blood sensor configured to produce a blood sensor signal is coupled to a processor. The processor is coupled to the detection and energy delivery circuitry, and used to evaluate and treat cardiac rhythms using both the cardiac electrophysiologic and blood sensor signals. The blood sensor is configured for subcutaneous non-intrathoracic placement and provided in or on the housing, on a lead coupled to the housing, and/or separate to the housing and coupled to the processor via hardwire or wireless link. The blood sensor may be configured for optical sensing, using a blood oxygen saturation sensor or pulse oximeter. A cardiac rhythm may be evaluated using the electrocardiogram signal and the blood sensor signal, and tachyarrhythmias may be treated after confirmation using the blood sense signal.
332 Citations
52 Claims
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1. An implantable subcutaneous device, comprising:
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a housing configured for subcutaneous non-intrathoracic placement; detection circuitry provided in the housing and configured to produce a cardiac electrophysiologic signal; energy delivery circuitry provided in the housing; at least one electrode configured for subcutaneous non-intrathoracic placement and coupled to the detection and energy delivery circuitry; an implantable blood sensor configured to produce a blood sensor signal; and a processor provided in the housing and coupled to the blood sensor and the detection and energy delivery circuitry, the processor configured to use the blood sensor signal to verify that the cardiac electrophysiologic signal comprises a cardiac signal, and configured to evaluate a cardiac rhythm using the blood sensor signal and the cardiac electrophysiologic signal comprising the cardiac signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A rhythm evaluation method, comprising:
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sensing an electrocardiogram signal at a subcutaneous non-intrathoracic location; acquiring a blood sense signal from a subcutaneous non-intrathoracic sensing location; verifying that, using the blood sense signal, the electrocardiogram signal comprises a cardiac signal; and evaluating a cardiac rhythm using the blood sense signal and the electrocardiogram signal comprising the cardiac signal. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. An implantable subcutaneous device, comprising:
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means for sensing an electrocardiogram signal at a subcutaneous non-intrathoracic location; means for acquiring a blood sense signal from a subcutaneous non-intrathoracic sensing location; means for verifying that, using the blood sense signal, the electrocardiogram signal comprises a cardiac signal; and means for evaluating a cardiac rhythm using the blood sense signal and the electrocardiogram signal comprising the cardiac signal. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51, 52)
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Specification