Heart failure patient management using an implantable monitoring system
First Claim
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1. An implantable medical device, comprising;
- a physiological sensor;
a memory storing a target value for a physiological variable and storing a plurality of formulations for computing a plurality of averaged metrics of the physiological variable;
a control unit configured for selecting a formulation for computing a first averaged metric of the plurality of averaged metrics and a second averaged metric of the plurality of averaged metrics from the plurality of formulations for computing a plurality of averaged metrics of the physiological variable, receiving a signal from the physiological sensor, computing the first averaged metric of the variable using the signal extending over a first periodic time interval and the second averaged metric of the variable using the signal extending over a second periodic time interval longer than and including the first periodic time interval such that the first and second averaged metrics provide different temporal resolutions of the physiological variable, and separately comparing each of the first averaged metric and the second averaged metric to the stored target value; and
a notification module configured for generating a notice in response to the comparisons of the computed metrics to the target value, wherein the memory stores the identity of the selected first averaged metric and the second averaged metric, and the notification module generates the notice in response to both the selected formulation and the comparison of the selected first averaged metric and the second averaged metric and the target value.
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Abstract
An implantable medical device system and method provide physiological variable monitoring for use in patient management. A target value for a physiological variable and formulations for computing metrics of the physiological variable are stored. Values of the physiological variable are determined from a sensed physiological signal and are used to compute a selected metric. The metric is compared to the stored target value.
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Citations
29 Claims
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1. An implantable medical device, comprising;
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a physiological sensor; a memory storing a target value for a physiological variable and storing a plurality of formulations for computing a plurality of averaged metrics of the physiological variable; a control unit configured for selecting a formulation for computing a first averaged metric of the plurality of averaged metrics and a second averaged metric of the plurality of averaged metrics from the plurality of formulations for computing a plurality of averaged metrics of the physiological variable, receiving a signal from the physiological sensor, computing the first averaged metric of the variable using the signal extending over a first periodic time interval and the second averaged metric of the variable using the signal extending over a second periodic time interval longer than and including the first periodic time interval such that the first and second averaged metrics provide different temporal resolutions of the physiological variable, and separately comparing each of the first averaged metric and the second averaged metric to the stored target value; and a notification module configured for generating a notice in response to the comparisons of the computed metrics to the target value, wherein the memory stores the identity of the selected first averaged metric and the second averaged metric, and the notification module generates the notice in response to both the selected formulation and the comparison of the selected first averaged metric and the second averaged metric and the target value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for use in an implantable medical device system, comprising;
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storing a target value for a physiological variable; storing a plurality of formulations for computing a plurality of averaged metrics of the physiological variable; selecting a formulation for computing a first averaged metric of the plurality of averaged metrics and a second averaged metric of the plurality of averaged metrics from the plurality of formulations for computing a plurality of averaged metrics of the physiological variable; sensing a physiological signal; computing the first averaged metric of the variable using the signal extending over a first periodic time interval and the second averaged metric of the variable using the signal extending over a second periodic time interval longer than and including the first periodic time interval such that the first and second averaged metrics provide different temporal resolutions of the physiological variable; separately comparing each of the first averaged metric and the second averaged metric to the stored target value; and generating a notice in response to the comparisons of the computed metrics to the target value, wherein the notice is generated in response to both the selected formulation and the comparison of the selected first averaged metric and the second averaged metric and the target value. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A non-transitory computer readable medium for storing a set of instructions which when implemented in an implantable medical device system cause the system to:
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store a target value for a physiological variable; store a plurality of formulations for computing a plurality of averaged metrics of the physiological variable; selecting a formulation for computing a first averaged metric of the plurality of averaged metrics and a second averaged metric of the plurality of averaged metrics from the plurality of formulations for computing a plurality of averaged metrics of the physiological variable; sense a physiological signal; compute the first averaged metric of the variable using the signal extending over a first periodic time interval and the second averaged metric of the variable using the signal extending over a second periodic time interval longer than and including the first periodic time interval such that the first and second averaged metrics provide different temporal resolutions of the physiological variable; separately compare each of the first averaged metric and the second averaged metric to the stored target value; and generate a notice in response to the comparisons of the computed metrics to the target value, wherein the notice is generated in response to both the selected formulation and the comparison of the selected first averaged metric and the second averaged metric and the target value.
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Specification