Electrode impedance measurement
First Claim
1. A method implemented by one or more data processors forming part of at least one computing device, the method comprising:
- monitoring, by at least one data processor of a computing device, electrocardiogram (ECG) electrodes each electrically connected to a patient body and a corresponding current source;
injecting, by the at least one data processor, one of a plurality of currents, each current having a respective predetermined level, into each ECG electrode;
measuring, by the at least one data processor, a plurality of ECG electrode voltages generated by the plurality of currents;
selecting, by the at least one data processor, a first reference ECG electrode from the monitored ECG electrodes, wherein unselected ECG electrodes include a plurality of non-reference ECG electrodes and a neutral drive electrode;
adjusting, by the at least one data processor, the plurality of currents after measuring the plurality of ECG electrode voltages while maintaining the predetermined level through the first reference ECG electrode; and
determining, by the at least one data processor, a plurality of impedances, each impedance corresponding to each non-reference ECG electrode, based on the plurality of ECG electrode voltages and the plurality of currents.
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Accused Products
Abstract
Systems and methods are provided herein for monitoring electrocardiogram (ECG) electrodes. Each ECG electrode is electrically connected to a patient body and a corresponding current source. A reference ECG electrode of the monitored ECG electrodes is selected. Current is injected into each electrode. Each current has a respective predetermined level. Based on the injected currents, ECG electrode voltages are generated. The injected currents are adjusted after measuring the ECG electrode voltages while the predetermined level through the reference ECG electrode is maintained. An impedance associated with each non-reference ECG electrode is determined based on the ECG electrode voltage and the injected current.
25 Citations
26 Claims
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1. A method implemented by one or more data processors forming part of at least one computing device, the method comprising:
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monitoring, by at least one data processor of a computing device, electrocardiogram (ECG) electrodes each electrically connected to a patient body and a corresponding current source; injecting, by the at least one data processor, one of a plurality of currents, each current having a respective predetermined level, into each ECG electrode; measuring, by the at least one data processor, a plurality of ECG electrode voltages generated by the plurality of currents; selecting, by the at least one data processor, a first reference ECG electrode from the monitored ECG electrodes, wherein unselected ECG electrodes include a plurality of non-reference ECG electrodes and a neutral drive electrode; adjusting, by the at least one data processor, the plurality of currents after measuring the plurality of ECG electrode voltages while maintaining the predetermined level through the first reference ECG electrode; and determining, by the at least one data processor, a plurality of impedances, each impedance corresponding to each non-reference ECG electrode, based on the plurality of ECG electrode voltages and the plurality of currents. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system comprising:
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at least one data processor; and memory storing instructions which, when executed by the at least one data processor, result in operations comprising; monitoring electrocardiogram (ECG) electrodes each electrically connected to a patient body and a corresponding current source; injecting one of a plurality of currents, each current having a respective predetermined level, into each ECG electrode; measuring a plurality of ECG electrode voltages generated by the plurality of currents; selecting a first reference ECG electrode from the monitored ECG electrodes, wherein unselected ECG electrodes include a plurality of non-reference ECG electrodes and a neutral drive electrode; adjusting the plurality of currents after measuring the plurality of ECG electrode voltages while maintaining the respective predetermined level through the first reference ECG electrode; and determining a plurality of impedances, each impedance corresponding to each non-reference ECG electrode, based on the plurality of ECG electrode voltages and the plurality of currents. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A computer programmable product comprising a computer-readable storage medium having computer-readable instructions stored in the computer-readable storage medium for executing the operations comprising:
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monitoring electrocardiogram (ECG) electrodes each electrically connected to a patient body and a corresponding current source; injecting one of a plurality of currents, each current having a respective predetermined level, into each ECG electrode; measuring a plurality of ECG electrode voltages generated by the plurality of currents; selecting a first reference ECG electrode from the monitored ECG electrodes, wherein unselected ECG electrodes include a plurality of non-reference ECG electrodes and a neutral drive electrode; adjusting the plurality of currents after measuring the plurality of ECG electrode voltages while maintaining the predetermined level through the first reference ECG electrode; and determining a plurality of impedances, each impedance corresponding to each non-reference ECG electrode of the ECG electrodes, based on the plurality of ECG electrode voltages and the plurality of currents. - View Dependent Claims (26)
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Specification