Physiological parameter monitoring with a mobile communication device
DCFirst Claim
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1. A method for physiological parameter monitoring, the method comprising:
- providing a physiological indicator signal to a handheld mobile communication device;
the physiological indicator signal being obtained from one of an image acquisition component, a photoplethysmographic (PPG) sensor and an electrocardiogram sensor;
analyzing, using the handheld mobile communication device, the physiological indicator signal;
obtaining, from said analyzing, measurements of one or more physiological parameters; and
detecting, using the handheld mobile communication device and using only the measurements of one or more physiological parameters, effects of motion artifacts in the measurements of the one or more physiological parameters and deciding whether to retain the measurements based on detected effects of motion artifacts;
wherein detecting effects of motion artifacts in the measurements comprises;
a. bandpass filtering and detrending a segment from the measurement of one physiological parameter;
wherein a bandpass filtered and detrended segment is hereinafter referred to as a preprocessed segment;
b. obtaining a value of at least one indicator of volatility, used in determining whether motion artifacts are present, for the preprocessed segment;
the at least one indicator of volatility being at least Shannon entropy (SE) for the preprocessed segment;
where
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Abstract
Systems and methods that enable physiological monitoring with a mobile communication device and that allow detection of motion artifacts so that the results reported are of acceptable quality are disclosed.
66 Citations
46 Claims
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1. A method for physiological parameter monitoring, the method comprising:
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providing a physiological indicator signal to a handheld mobile communication device;
the physiological indicator signal being obtained from one of an image acquisition component, a photoplethysmographic (PPG) sensor and an electrocardiogram sensor;analyzing, using the handheld mobile communication device, the physiological indicator signal; obtaining, from said analyzing, measurements of one or more physiological parameters; and detecting, using the handheld mobile communication device and using only the measurements of one or more physiological parameters, effects of motion artifacts in the measurements of the one or more physiological parameters and deciding whether to retain the measurements based on detected effects of motion artifacts; wherein detecting effects of motion artifacts in the measurements comprises; a. bandpass filtering and detrending a segment from the measurement of one physiological parameter;
wherein a bandpass filtered and detrended segment is hereinafter referred to as a preprocessed segment;b. obtaining a value of at least one indicator of volatility, used in determining whether motion artifacts are present, for the preprocessed segment;
the at least one indicator of volatility being at least Shannon entropy (SE) for the preprocessed segment;
where - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for physiological parameter monitoring, the method comprising:
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providing a physiological indicator signal to a handheld mobile communication device;
the physiological indicator signal being obtained from one of an image acquisition component, a photoplethysmographic (PPG) sensor and an electrocardiogram sensor;analyzing, using the handheld mobile communication device, the physiological indicator signal;
wherein analysis does not include Independent Component Analysis;obtaining, from said analyzing, measurements of one or more physiological parameters; and detecting, using the handheld mobile communication device and using only the measurements of one or more physiological parameters, effects of motion artifacts in the measurements of the one or more physiological parameters and deciding whether to retain the measurements based on effects of motion artifacts in the measurements; wherein the one or more physiological measurements comprise a measure of atrial fibrillation; wherein obtaining the measure of atrial fibrillation comprises; obtaining a time-varying coherence function by multiplying two time-varying transfer functions (TVFTs), the two time-varying transfer functions obtained using two adjacent data segments, from the physiological indicator signal, one of the two adjacent data segment as an input signal and another of the two adjacent data segment as an output signal to produce a first TVTF;
a second TVTF is produced by reversing the input and the output signals, using said another of the two adjacent data segment as the input signal and said one of the two adjacent data segment as the output signal; anddetermining whether the time-varying coherence function is less than a predetermined quantity. - View Dependent Claims (17, 18, 19, 20)
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21. A system for physiological parameter monitoring, the system comprising:
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a physiological indicator signal sensing component;
the physiological indicator signal sensing component being one of an image acquisition component, a photoplethysmographic (PPG) sensor and an electrocardiogram sensor; and
a handheld mobile communication device comprising;at least one processor; and at least one computer usable medium, the computer usable medium having computer readable code embodied therein, the computer readable code causing the at least one processor to; analyze the physiological indicator signal; obtain, from results of analyzing, measurements of one or more physiological parameters; and detect effects of motion artifacts in the measurements of the one or more physiological parameters; wherein the computer readable code, in causing the at least one processor to detect effects of motion artifacts, causes the at least one processor to; a. bandpass filter and detrend a segment from the measurement of one physiological parameter;
wherein a bandpass filtered and detrended segment is hereinafter referred to as a preprocessed segment;b. obtain a value of at least one indicator of volatility, used in determining whether motion artifacts are present, for the preprocessed segment;
the at least one indicator of volatility being at least Shannon entropy (SE) for the preprocessed segment;
where - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A system for physiological parameter monitoring, the system comprising:
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a physiological indicator signal sensing component; and
a handheld mobile communication device comprising;at least one processor; and at least one computer usable medium, the computer usable medium having computer readable code embodied therein, the computer readable code causing the at least one processor to; analyze the physiological indicator signal;
the physiological indicator signal being obtained from one of an image acquisition component, a photoplethysmographic (PPG) sensor and an electrocardiogram sensor;wherein analysis does not include Independent Component Analysis; obtain, from results of analyzing, measurements of one or more physiological parameters; and detect effects of motion artifacts, using only the measurements of one or more physiological parameters, in the measurements of the one or more physiological parameters;
wherein the one or more physiological measurements comprise a measure of atrial fibrillation; and
wherein the computer readable code, in causing the at least one processor to analyze the physiological indicator signal, causes the at least one processor to;obtain a time-varying coherence function by multiplying two time-varying transfer functions (TVFTs), the two time-varying transfer functions obtained using two adjacent data segments from the physiological indicator signal, one of the two adjacent data segment as an input signal and another of the two adjacent data segment as an output signal to produce a first TVTF;
a second TVTF is produced by reversing the input and the output signals, using said another of the two adjacent data segment as the input signal and said one of the two adjacent data segment as the output signal; anddetermine whether the time-varying coherence function is less than a predetermined quantity. - View Dependent Claims (33, 34, 35, 36)
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37. A non-transitory computer usable medium having computer readable code embodied therein, the computer readable code causing at least one processor to:
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analyze a physiological indicator signal;
the physiological indicator signal being obtained from one of an image acquisition component, a photoplethysmographic (PPG) sensor and an electrocardiogram sensor;obtain, from said analyzing, measurements of one or more physiological parameters; and detect, using only the measurements of one or more physiological parameters, effects of motion artifacts in the measurements of the one or more physiological parameters; wherein the computer readable code, in causing the at least one processor to detect effects of motion artifacts, causes the at least one processor to; a. bandpass filter and detrend a segment from the measurement of one physiological parameter;
wherein a bandpass filtered and detrended segment is hereinafter referred to as a preprocessed segment;b. obtain a value of at least one indicator of volatility, used in determining whether motion artifacts are present, for the preprocessed segment;
the at least one indicator of volatility being at least Shannon entropy (SE) for the preprocessed segment;
where - View Dependent Claims (38, 39, 40, 41)
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42. A non-transitory computer usable medium having computer readable code embodied therein, the computer readable code causing at least one processor to:
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analyze the physiological indicator signal;
the physiological indicator signal being obtained from one of an image acquisition component, a photoplethysmographic (PPG) sensor and an electrocardiogram sensor;wherein analysis does not include Independent Component Analysis; obtain, from said analyzing, measurements of one or more physiological parameters; and detect, using only the measurements of one or more physiological parameters, effects of motion artifacts in the measurements of the one or more physiological parameters;
wherein the one or more physiological measurements comprise a measure of atrial fibrillation; and
wherein the computer readable code, in causing the at least one processor to analyze the physiological indicator signal, causes the at least one processor to;obtain a time-varying coherence function by multiplying two time-varying transfer functions (TVFTs), the two time-varying transfer functions obtained using two adjacent data segments, from the physiological indicator signal, one of the two adjacent data segment as an input signal and another of the two adjacent data segment as an output signal to produce a first TVTF;
a second TVTF is produced by reversing the input and the output signals, using said another of the two adjacent data segment as the input signal and said one of the two adjacent data segment as the output signal; anddetermine whether the time-varying coherence function is less than a predetermined quantity. - View Dependent Claims (43, 44, 45, 46)
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Specification