Method and system for determining kidney failure
First Claim
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1. A method for determining kidney failure in a patient using an implantable medical device, the method comprising:
- measuring a first magnitude of a first polarization signal;
measuring an additional magnitude of an additional polarization signal after a first interval;
determining a deflection differential between the first magnitude and the additional magnitude; and
determining whether a patient is likely to be experiencing or to experience kidney failure when the deflection differential is greater than an established threshold.
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Abstract
A method of determining kidney failure in a patient using an implantable medical device is described. In one embodiment, a first magnitude of a first polarization signal is measured. An additional magnitude of an additional polarization signal is measured after a first interval. A deflection differential between the first magnitude and the additional magnitude is determined and kidney failure in the patient is determined when the deflection differential is greater than an established threshold.
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Citations
62 Claims
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1. A method for determining kidney failure in a patient using an implantable medical device, the method comprising:
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measuring a first magnitude of a first polarization signal;
measuring an additional magnitude of an additional polarization signal after a first interval;
determining a deflection differential between the first magnitude and the additional magnitude; and
determining whether a patient is likely to be experiencing or to experience kidney failure when the deflection differential is greater than an established threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of determining kidney failure using a pacing system, the pacing system comprising at least one medical electrical lead having at least one first electrode configured for positioning in a cardiac tissue of a patient, an implantable pulse generator operably connected to the at least one medical electrical lead, and means for measuring a magnitude of a polarization signal, the method comprising:
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measuring a first magnitude of a first polarization signal;
measuring an additional magnitude of an additional polarization signal after a first interval;
determining a deflection differential between the first magnitude and the additional magnitude; and
determining a kidney failure in the patient when the deflection differential is greater than an established threshold. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An implantable medical device for determining kidney failure in a patient, said device comprising:
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at least one sensor lead operable to sense at least one polarization signal;
a processor operatively coupled to said at least one sensor lead;
wherein said processor is operable to measure a first magnitude of a first polarization signal during a first visit of the patient for a dialysis treatment;
wherein said processor is further operable to measure a second magnitude of a second polarization signal during a second visit of the patient for a dialysis treatment;
wherein said processor is further operable to determine a deflection differential between the first magnitude and the second magnitude; and
wherein said processor is further operable to determine a kidney failure in the patient when the deflection differential is greater than an established threshold. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
at least one pacing lead operable to pace the cardiac tissue of the patient.
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25. The device of claim 24 wherein the processor is further operable to monitor a heart rate of the cardiac tissue.
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26. The device of claim 24 wherein the processor is further operable to determine the established threshold.
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27. The device of claim 24 further comprising a database comprising a plurality of differential values, wherein the processor is further operable to determine the established threshold by comparing the deflection differential to the differential values.
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28. The device of claim 23 wherein the processor is further operable to set the established threshold at a predetermined value based on a patient history.
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29. The device of claim 23, further comprising a storage location for storing at least one established threshold value.
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30. The device of claim 23, further comprising a storage location for storing the first magnitude.
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31. The device of claim 23, further comprising a storage location for storing the second magnitude.
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32. An implantable medical device, comprising:
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an implantable pulse generator;
at least one medical electrical lead operably connected to the implantable pulse generator, the medical electrical lead having at least one first electrode configured for positioning in a cardiac tissue of a patient; and
a processor operably adapted to measure a first magnitude of a first polarization signal in the cardiac tissue of the patient and to measure an additional magnitude of an additional polarization signal after a first interval;
the processor further operably adapted to determine a deflection differential between the first magnitude and the additional magnitude; and
to determine a kidney failure in the patient when the deflection differential is greater than an established threshold. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40)
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41. An implantable medical system for determining kidney failure in a patient, the system comprising:
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at least one medical electrical lead having at least one first electrode configured for positioning in a cardiac tissue of the patient;
an implantable pulse generator operably connected to the at least one medical electrical lead;
means for measuring a first magnitude of a first polarization signal;
means for measuring an additional magnitude of an additional polarization signal after a first interval;
means for determining a deflection differential between the first magnitude and the additional magnitude; and
means for determining a kidney failure in the patient when the deflection differential is greater than an established threshold. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. System means for implementing a computer useable medium including a computer program for determining kidney failure in a patient using a pacing system, the pacing system comprising at least one medical electrical lead having at least one first electrode configured for positioning in a cardiac tissue of a patient, an implantable pulse generator operably connected to the at least one medical electrical lead, and means for measuring a magnitude of a polarization signal, the system implementing means comprising:
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means for implementing computer program code that measures a first magnitude of a first polarization signal;
means for implementing computer program code that measures an additional magnitude of an additional polarization signal after a first interval;
means for implementing computer program code that determines a deflection differential between the first magnitude and the additional magnitude; and
means for implementing computer program code that determines a kidney failure in the patient when the deflection differential is greater than an established threshold. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59, 60, 61, 62)
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Specification