Advanced thoracic fluid monitoring capability with impedance
First Claim
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1. An implantable medical device for detection of changes in impedance in a patient, comprising:
- means for measuring impedances corresponding to a supine patient position and for measuring impedances corresponding to an upright patient position;
means for generating a diurnal delta corresponding to the impedance differences between the supine and upright patient positions.
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Abstract
Advanced thoracic fluid monitoring capabilities using impedance are disclosed. An implantable medical device used for detection of changes in impedance in a patient can have means for measuring impedances of the patient in a supine position and in an upright position. Impedance differences can be generated which correspond to a diurnal delta value showing impedance differences between the supine and upright positions.
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Citations
20 Claims
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1. An implantable medical device for detection of changes in impedance in a patient, comprising:
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means for measuring impedances corresponding to a supine patient position and for measuring impedances corresponding to an upright patient position;
means for generating a diurnal delta corresponding to the impedance differences between the supine and upright patient positions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An implantable medical device, comprising:
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a plurality of electrodes;
an output circuit outputting a plurality of output pulse signals along a vector formed by two electrodes of the plurality of electrodes;
a measurement circuit generating a corresponding plurality of measurement signals in response to the plurality of output pulse signals; and
a microprocessor determining a plurality of impedances in response to the plurality of output pulse signals and the plurality of measurement signals corresponding to a nighttime period and a daytime period, and generating a diurnal delta value that is a differential value of the impedances measured during the daytime period and the nighttime period. - View Dependent Claims (11, 12)
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13. A computer-readable medium programmed with instructions for performing a method in an implantable medical device, the medium comprising instructions for causing a programmable processor to:
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measure impedances of a patient in a supine position;
measure impedances of the patient in an upright position; and
generate a diurnal delta corresponding to impedance differences between the supine and upright positions. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification