Method and System for Processing Data from Ambulatory Physiological Monitoring
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Abstract
This invention provides methods and systems for the analysis of data returned from monitoring multiple physiological parameters of a subject, especially from ambulatory multiple parameter monitoring. The methods and systems remove motion artifacts from signals and separate multiple components of single signals due to two or more physiological systems or processes. Each output signal is are preferably free from motion artifacts and reflects primarily functioning of only a single physiological system or process.
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Citations
108 Claims
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1-29. -29. (canceled)
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30. A system for processing physiological sensor signal data comprising:
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a wearable construction comprising one or more sensors sensitive to one or more physiological systems or processes including motion activity; and computer memory comprising computer instructions to retrieve a plurality of physiological sensor signals from said wearable construction when worn by a monitored subject during periods comprising unconstrained activities, said retrieved sensor signals comprising reference signals sensitive to subject motion activity; and enhance desired physiological components relative to undesired motion artifact components in one or more retrieved sensor signals, said enhancing comprising adaptively processing said sensor signals jointly with one or more of said reference signals in order to reduce an error signal. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A system for processing physiological sensor signal data comprising:
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a wearable construction comprising one or more sensors sensitive to physiological systems or processes comprising cardiac pulsation activity and respiratory activity; and computer memory comprising computer instructions to retrieve sensor signals from said wearable construction when worn by a monitored subject during periods comprising unconstrained activities, said retrieved sensor signals comprising cardiac signals with cardiac pulsation components and respiratory signals with respiratory activity components; and enhance desired cardiac components relative to undesired respiratory components in said cardiac signals, said enhancing comprising adaptively processing said cardiac signals jointly with said respiratory signals in order to reduce an error signal. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60)
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61. A system for processing physiological sensor signal data comprising:
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a wearable construction comprising one or more sensors sensitive to physiological systems or processes comprising electroencephalographic (EEG) activity and respiratory activity; and computer memory comprising computer instructions to retrieve sensor signals from said wearable construction when worn by a monitored subject during periods comprising unconstrained activities, said retrieved sensor signals comprising EEG signals and respiratory signals; estimate respiratory components in said EEG signal by adaptively processing said EEG signals jointly with said respiratory signals in order to reduce an error signal; and enhance desired EEG components relative to undesired respiratory components in said EEG signals in dependence on said estimated respiratory components. - View Dependent Claims (62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72)
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73. A system for processing physiological sensor signal data comprising:
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a wearable construction comprising one or more sensors sensitive to physiological systems or processes comprising electrocardiographic (ECG) activity and respiratory activity; and computer memory comprising computer instructions to retrieve sensor signals from said wearable construction when worn by a monitored subject during periods comprising unconstrained activities, said retrieved sensor signals comprising ECG signals and respiratory signals; generate an RR interval signal from said ECG signal comprising data describing successive intervals between successive R-waves; and estimate respiratory components in said ECG signal by adaptively processing said ECG signals jointly with said respiratory signals in order to reduce an error signal, wherein a high frequency heart rate variability (HF HRV) signal comprises said estimated respiratory components, a low frequency heart rate variability (LF HRV) signal comprises said error signal. - View Dependent Claims (74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91)
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92. A system for processing physiological sensor signal data comprising:
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a wearable construction comprising one or more sensors sensitive to physiological systems or processes comprising electrocardiographic (ECG) activity and respiratory activity; and computer memory comprising computer instructions to retrieve sensor signals from said wearable construction when worn by a monitored subject during periods comprising unconstrained activities, said retrieved sensor signals comprising ECG signals and respiratory signals; generate an RR interval signal from said ECG signal comprising data describing intervals between successive R-waves; estimate respiratory components in said ECG signal by adaptively processing said ECG signals jointly with said respiratory signals in order to reduce an error signal, wherein a low frequency heart rate variability (LF HRV) signal comprises said error signal; and estimate one or more corrected QT intervals independence on QT intervals measured in said ECG signal and on said LF HRV signal. - View Dependent Claims (93, 94, 95, 96, 97, 98, 99, 100, 101, 103, 104, 105)
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102. The method claim 102 wherein said discarding further comprises interpolating a constructed R wave at the expected temporal position of a discarded ectopic R wave.
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106. A computer memory comprising computer instructions for processing sensor signals arising from a plurality of sensors sensitive to a plurality of physiological systems or processes of a monitored subject, by performing:
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adaptively enhancing desired physiological components relative to undesired artifact components in one or more sensor signals monitored from said subject during periods comprising unconstrained activity; and adaptively enhancing components sensitive to desired physiological systems or processes relative to components sensitive to other undesired physiological systems or processes in one or more of the sensor signals that have adaptively enhanced physiological components.
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- 107. The computer memory of claim 107 further comprising one or more CD-ROMS.
Specification