SYSTEM AND METHOD FOR DETERMINING CHANGES IN A BODY STATE
First Claim
1. A computer-implemented method for determining changes in a body state of an individual, comprising:
- receiving a signal from a monitoring system, said signal indicating a measurement of cardiac activity over a period of time;
determining at least one signal feature, wherein the signal feature is a reoccurring event of the signal over the period of time;
determining a first interval between two successive signal features;
determining a second interval between two successive first intervals;
calculating a derivative based on the second interval; and
identifying changes in the body state based on the derivative.
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Accused Products
Abstract
A method and a system for determining changes in a body state of an individual including receiving a signal from a monitoring system, where the signal indicates a measurement of cardiac activity of the individual over a period of time and determining at least one signal feature, where the signal feature is a reoccurring event of the signal over the period of time. The method also includes determining a first interval between two successive signal features and determining a second interval between two successive first intervals. A derivative is calculated based on the second interval. Changes in the body state are identified based on the derivative.
35 Citations
25 Claims
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1. A computer-implemented method for determining changes in a body state of an individual, comprising:
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receiving a signal from a monitoring system, said signal indicating a measurement of cardiac activity over a period of time; determining at least one signal feature, wherein the signal feature is a reoccurring event of the signal over the period of time; determining a first interval between two successive signal features; determining a second interval between two successive first intervals; calculating a derivative based on the second interval; and identifying changes in the body state based on the derivative. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A computer-implemented method for analyzing transitions in a body state, comprising:
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receiving a signal from an individual indicating a measurement of cardiac activity over a period of time; calculating a derivative of a heart rate based on a reoccurring feature of the signal; extracting a plurality of heart rate accelerations or decelerations based on the derivative; and identifying a transition in the body state based on the plurality of heart rate accelerations or decelerations. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A computer system for determining changes in a body state of an individual, comprising:
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a monitoring system configured to monitor cardiac activity; a signal receiving module configured to receive a signal from the monitoring system, said signal representing a measurement of cardiac activity over a period of time; a feature determination module configured to determine a signal feature, wherein the signal feature is a reoccurring event of said signal over the period of time; an interval determination module configured to determine a first interval between two successive signal features and a second interval between two successive first intervals; a derivative calculation module configured to calculate a derivative of a heart rate based on the second interval; and an identification module configured to identify changes in the body state based on the derivative. - View Dependent Claims (19, 20, 21, 22)
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23. A non-transitory computer-readable medium storing computer-executable instructions that when executed by a computer, which includes at least a processor, cause the computer to perform a method, the method comprising:
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receiving, using the at least a processor, a signal indicating a plurality of cardiac cycles of an individual over a period of time; detecting, using the at least a processor, a signal feature, wherein the signal feature is a reoccurring event of the signal over the period of time; and calculating, using the at least a processor, a first interval between two successive signal features; calculating, using the at least a processor, a second interval between two successive first intervals; calculating, using the at least a processor, a derivative based on the second interval; and identifying, using at least a processor, changes in a body state based on the derivative. - View Dependent Claims (24, 25)
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Specification