SYSTEM AND METHOD FOR EVALUATING VARIATION IN THE TIMING OF PHYSIOLOGICAL EVENTS
First Claim
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1. A method of evaluating variation in the timing of a physiological parameter, comprising:
- collecting physiological parameter data comprising a sequence of numerical values for the physiological parameter over time;
accumulating one or more sums from the physiological parameter data;
calculating a running sample variance based at least in part upon the one or more sums;
calculating an index based at least in part upon the running sample variance; and
providing an indication of timing of the physiological parameter based at least in part upon the index.
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Abstract
In embodiments, methods and systems are provided for the calculation of one or more indices representing variability in the timing of events in a signal representing a physiological parameter. In embodiments, the method and system may utilize an infinite impulse response formulation for the calculation of the indices to minimize memory and computational overhead, while additionally making the indices more responsive to newer measurements.
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Citations
13 Claims
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1. A method of evaluating variation in the timing of a physiological parameter, comprising:
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collecting physiological parameter data comprising a sequence of numerical values for the physiological parameter over time; accumulating one or more sums from the physiological parameter data; calculating a running sample variance based at least in part upon the one or more sums; calculating an index based at least in part upon the running sample variance; and providing an indication of timing of the physiological parameter based at least in part upon the index. - View Dependent Claims (2, 3, 4)
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5. A medical device, comprising:
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a sensor capable of collecting physiological parameter data, the physiological parameter data comprising a sequence of numerical values for a physiological parameter over a time period; a processor capable of processing the physiological parameter data; and a memory capable of storing computer readable instructions, wherein the contents of the memory comprises computer readable instructions capable of directing the microprocessor to; collect the physiological parameter data from the sensor; accumulate one or more sums from the physiological parameter data; calculate a running sample variance based at least in part upon the one or more sums; calculate an index based at least in part upon the running sample variance; and provide an indication of the timing of the physiological parameter based at least in part upon the index. - View Dependent Claims (6, 7, 8, 9)
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10. A tangible machine readable media having instructions stored thereon, when, if executed cause a method to be performed, the method, comprising:
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collecting physiological parameter data comprising a sequence of numerical values for a physiological parameter over time; accumulating one or more sums from the physiological parameter data; calculating a running sample variance based at least in part upon the one or more sums; calculating an index based at least in part upon the running sample variance; and providing an indication of the timing of the physiological parameter based at least in part upon the index. - View Dependent Claims (11, 12, 13)
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Specification