Method and apparatus to measure bioelectric impedance of patient tissue
First Claim
1. A device for measuring an electrocardiogram signal of a patient, the device comprising:
- an adhesive patch that includes at least two electrodes configured to couple to the tissue of the patient;
an electronics module comprising electrocardiogram circuitry and a processor mounted on a flex printed circuit board (PCB), wherein the electrocardiogram circuitry is coupled to two or more of the at least two electrodes via electrical traces formed on the flex PCB, and the processor is programmed to receive and process the electrocardiogram signal measured from the patient; and
at least two connectors positioned in alignment with the at least two electrodes to connect the at least two electrodes to the traces formed on the flex PCB, wherein the at least two connectors are comprised of insulated wires.
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Accused Products
Abstract
A device to measure tissue impedance comprises drive circuitry coupled to calibration circuitry, such that a calibration signal from the calibration circuitry corresponds to the current delivered through the tissue. Measurement circuitry can be coupled to measurement electrodes and the calibration circuitry, such that the tissue impedance can be determined in response to the measured calibration signal from the calibration circuitry and the measured tissue impedance signal from the measurement electrodes. Processor circuitry comprising a tangible medium can be configured to determine a complex tissue impedance in response to the calibration signal and the tissue impedance signal. The processor can be configured to select a frequency for the drive current, and the amount of drive current at increased frequencies may exceed a safety threshold for the drive current at lower frequencies.
481 Citations
16 Claims
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1. A device for measuring an electrocardiogram signal of a patient, the device comprising:
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an adhesive patch that includes at least two electrodes configured to couple to the tissue of the patient; an electronics module comprising electrocardiogram circuitry and a processor mounted on a flex printed circuit board (PCB), wherein the electrocardiogram circuitry is coupled to two or more of the at least two electrodes via electrical traces formed on the flex PCB, and the processor is programmed to receive and process the electrocardiogram signal measured from the patient; and at least two connectors positioned in alignment with the at least two electrodes to connect the at least two electrodes to the traces formed on the flex PCB, wherein the at least two connectors are comprised of insulated wires. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A device for measuring an electrocardiogram signal of a patient, the device comprising:
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an adhesive patch that includes at least four electrodes configured to couple to the tissue of the patient, wherein at least two of the electrodes are measurement electrodes and at least two of the electrodes are drive electrodes; and an electronics module comprising electrocardiogram circuitry coupled to two or more of the at least two electrodes, and a processor programmed to receive and process the electrocardiogram signal measured from the patient; wherein the adhesive patch and the electronics module are separable. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification