Apparatus and method for patient activity estimation and classification
First Claim
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1. A method comprising:
- sensing, from a patient, an electrical physiologic signal between a single electrode pair;
obtaining, using detection circuitry, a cardiac signal component from the electrical physiologic signal;
obtaining, using the detection circuitry, a non-cardiac signal component from the electrical physiologic signal;
comparing, using a processor, the cardiac and non-cardiac signal components to respective thresholds established for the patient;
detecting, using the processor, patient activity using the cardiac signal component;
detecting, using the processor, patient activity using the non-cardiac signal component;
determining, using the processor, whether the patient activity detected using the cardiac signal component corresponds to voluntary classified activity or involuntary classified activity of the patient and whether the patient activity detected using the non-cardiac signal component corresponds to voluntary classified activity or involuntary classified activity of the patient;
detecting, using the processor, an adverse patient condition in response to detecting that one of the cardiac and non-cardiac signal components indicates patient voluntary classified activity and the other of the cardiac and non-cardiac signal components indicates patient involuntary classified activity based on the comparison and temporal alignment of the cardiac signal component relative to the non-cardiac signal component; and
generating, by the processor, an output comprising the cardiac signal component, the non-cardiac signal component, and an indicator of dyssynchrony between the cardiac and non-cardiac signal components indicative of the detected adverse patient condition.
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Abstract
A medical device includes a housing and an electrode arrangement coupled to the housing and configured to sense an electrical physiologic signal from a patient. The device also includes detection circuitry coupled to the electrode arrangement and configured to obtain a cardiac signal component and a non-cardiac signal component from the physiological signal. A processor is coupled to the detection circuitry. The processor is configured to detect patient activity using at least the non-cardiac signal component and discriminate between voluntary and involuntary activity of the patient based on a comparison of temporally aligned cardiac and non-cardiac signal components.
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Citations
19 Claims
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1. A method comprising:
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sensing, from a patient, an electrical physiologic signal between a single electrode pair; obtaining, using detection circuitry, a cardiac signal component from the electrical physiologic signal; obtaining, using the detection circuitry, a non-cardiac signal component from the electrical physiologic signal; comparing, using a processor, the cardiac and non-cardiac signal components to respective thresholds established for the patient; detecting, using the processor, patient activity using the cardiac signal component; detecting, using the processor, patient activity using the non-cardiac signal component; determining, using the processor, whether the patient activity detected using the cardiac signal component corresponds to voluntary classified activity or involuntary classified activity of the patient and whether the patient activity detected using the non-cardiac signal component corresponds to voluntary classified activity or involuntary classified activity of the patient; detecting, using the processor, an adverse patient condition in response to detecting that one of the cardiac and non-cardiac signal components indicates patient voluntary classified activity and the other of the cardiac and non-cardiac signal components indicates patient involuntary classified activity based on the comparison and temporal alignment of the cardiac signal component relative to the non-cardiac signal component; and generating, by the processor, an output comprising the cardiac signal component, the non-cardiac signal component, and an indicator of dyssynchrony between the cardiac and non-cardiac signal components indicative of the detected adverse patient condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A medical device comprising:
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a housing; an electrode arrangement coupled to the housing and configured to sense an electrical physiologic signal from a patient; detection circuitry coupled to the electrode arrangement and configured to obtain a cardiac signal component and a non-cardiac signal component from the electrical physiologic signal; an output device; and a processor coupled to the detection circuitry and the output device, the processor configured to; detect patient activity using the non-cardiac signal component and to detect patient activity using the cardiac signal component; determine whether the patient activity detected using the cardiac signal component corresponds to voluntary classified activity or involuntary classified activity of the patient and whether the patient activity detected using the non-cardiac signal component corresponds to voluntary classified activity or involuntary classified activity of the patient; detect an adverse patient condition in response to detecting that one of the cardiac and non-cardiac signal components indicates patient voluntary classified activity and the other of the cardiac and non-cardiac signal components indicates patient involuntary classified activity; and cooperate with the output device to generate an output comprising the cardiac signal component, the non-cardiac signal component, and an indicator that indicates dyssynchrony between the cardiac and non-cardiac signal components indicative of the detected adverse patient condition. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification