Apparatus and method for detection of sleep disordered breathing
First Claim
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1. A system comprising:
- a waveform acquisition apparatus configured to detect an electrocardiogram (ECG) signal during discrete time separated detection windows and configured to not detect the ECG signal during a time between the discrete time separated detection windows, the discrete time separated detection windows having a duration corresponding to at least a plurality of heart beats;
an analyzer, comprising;
first processing circuitry configured to derive one or more respiratory disturbance indices from the ECG signal and detect a respiratory disturbance state in response to the one or more respiratory disturbance indices deviating from a threshold value;
second processing circuitry configured to interpolate the one or more respiratory disturbance indices between an ending state and a subsequent beginning state of adjacent time separated detection windows; and
third processing circuitry configured to determine a respiratory disturbance episode based on the detected respiratory disturbance states during the detection windows and the interpolation between detection windows, wherein the respiratory disturbance episode is determined if the respiratory disturbance state is present in both the ending state and the subsequent beginning state of adjacent time separated detection windows, and wherein the respiratory disturbance episode is not determined if the respiratory disturbance state is not present at both the ending state and the subsequent beginning state of adjacent time separated detection windows; and
a respiratory therapy apparatus, wherein the respiratory therapy apparatus is configured to deliver a respiratory therapy in response to the respiratory disturbance episode.
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Abstract
An apparatus, system, and method directed to detecting a physiological signal during discrete time separated detection windows, deriving one or more respiratory disturbance indices from the physiological signal, detecting a respiratory disturbance state in response to the one or more respiratory disturbance indices deviating from a threshold value, interpolating the one or more respiratory disturbance indices between adjacent time separated detection windows, and declaring a respiratory disturbance episode based on the detected respiratory disturbance state during the detection windows and the interpolation between detection windows.
19 Citations
23 Claims
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1. A system comprising:
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a waveform acquisition apparatus configured to detect an electrocardiogram (ECG) signal during discrete time separated detection windows and configured to not detect the ECG signal during a time between the discrete time separated detection windows, the discrete time separated detection windows having a duration corresponding to at least a plurality of heart beats; an analyzer, comprising; first processing circuitry configured to derive one or more respiratory disturbance indices from the ECG signal and detect a respiratory disturbance state in response to the one or more respiratory disturbance indices deviating from a threshold value; second processing circuitry configured to interpolate the one or more respiratory disturbance indices between an ending state and a subsequent beginning state of adjacent time separated detection windows; and third processing circuitry configured to determine a respiratory disturbance episode based on the detected respiratory disturbance states during the detection windows and the interpolation between detection windows, wherein the respiratory disturbance episode is determined if the respiratory disturbance state is present in both the ending state and the subsequent beginning state of adjacent time separated detection windows, and wherein the respiratory disturbance episode is not determined if the respiratory disturbance state is not present at both the ending state and the subsequent beginning state of adjacent time separated detection windows; and a respiratory therapy apparatus, wherein the respiratory therapy apparatus is configured to deliver a respiratory therapy in response to the respiratory disturbance episode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus, comprising:
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electrodes adapted to acquire electrocardiogram (ECG) waveforms from an implanted subcutaneous extrathoracic location of a patient; a data acquisition module configured to capture the ECG waveforms during discrete time separated detection windows and configured to not detect the ECG waveforms during a time between the discrete time separated detection windows, the discrete time separated detection windows having a duration corresponding to at least a plurality of heart beats; and an analyzer, comprising; first processing circuitry configured to derive one or more respiratory disturbance indices from the ECG waveforms and detect a respiratory disturbance state in response to the one or more respiratory disturbance indices deviating from a threshold value; second processing circuitry configured to interpolate the one or more respiratory disturbance indices between an ending state and a subsequent beginning state of adjacent time separated detection windows; third processing circuitry configured to determine a respiratory disturbance episode based on the detected respiratory disturbance states during the detection windows and the interpolation between detection windows, wherein the respiratory disturbance episode is determined if the respiratory disturbance state is present in both the ending state and the subsequent beginning state of adjacent time separated detection windows, and wherein the respiratory disturbance episode is not determined if the respiratory disturbance state is not present at both the ending state and the subsequent beginning state of adjacent time separated detection windows; and a respiratory therapy apparatus, wherein the respiratory therapy apparatus is configured to deliver a respiratory therapy in response to the respiratory disturbance episode. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification