QUANTIFYING AUTONOMIC TONE WITH THORACIC IMPEDANCE
First Claim
1. A method comprising:
- measuring a plurality of thoracic impedance values of a patient; and
generating a value of at least one autonomic parameter based on variation of the plurality of measured thoracic impedance values, the autonomic parameter value indicative of a relative autonomic nervous system (ANS) health of the patient.
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Abstract
The disclosure describes techniques for quantifying the autonomic nervous system (ANS) health of a patient with thoracic impedance measurements. Thoracic impedance may be measured utilizing cardiac electrodes and an implantable medical device housing or other electrodes located on or within the patient. Since greater variability in thoracic impedance may indicate better health of the ANS, monitoring impedance changes in a patient may be used to quantify autonomic tone of the ANS, and ultimately, overall patient health. In some examples, thoracic impedance may be measured in response to a change in patient posture for acute monitoring or at predetermined times over several days, weeks, or months for more chronic monitoring of the patient. An implantable medical device may independently analyze the impedance measurements and transmit an alert to the patient or clinician when impedance changes indicate a change in patient health.
19 Citations
22 Claims
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1. A method comprising:
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measuring a plurality of thoracic impedance values of a patient; and generating a value of at least one autonomic parameter based on variation of the plurality of measured thoracic impedance values, the autonomic parameter value indicative of a relative autonomic nervous system (ANS) health of the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system comprising:
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a plurality of electrodes; a sensing module that measures a plurality of thoracic impedance values of a patient via the electrodes; and a processor that generates a value of at least one autonomic parameter based on variation of the plurality of measured thoracic impedance values, the autonomic parameter value indicative of a relative autonomic nervous system (ANS) health of the patient. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A system comprising:
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means for measuring a plurality of thoracic impedance values of a patient; and means for generating a value of at least one autonomic parameter based on variation of the plurality of measured thoracic impedance values, the autonomic parameter value indicative of a relative autonomic nervous system (ANS) health of the patient.
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22. A computer-readable storage medium comprising instruction that cause a processor to:
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measure a plurality of thoracic impedance values of a patient; and generate a value of at least one autonomic parameter based on the measured thoracic impedance values, the autonomic parameter value indicative of a relative autonomic nervous system (ANS) health of the patient.
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Specification