Atrial fibrillation detection using SPO2
First Claim
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1. A method of detecting atrial fibrillation in a human or animal subject, the method comprising:
- acquiring a plethysmographic waveform of a patient from a monitoring device over a period of time;
measuring a set of pulse intervals from the plethysmographic waveform;
measuring a set of features from the plethysmographic waveform; and
analyzing the set of pulse intervals and the set of pulse features from the plethysmographic waveform to determine an atrial fibrillation state of the patient.
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Abstract
The method and system includes detecting atrial fibrillation in a patient by monitoring the blood oxygen saturation level over a period of time. The method and system produces a plethysmographic waveform from the monitored blood oxygen saturation level and analyzes the plethysmographic waveform and detected intervals and determines whether the patient is in atrial fibrillation. The method and system is preferably implemented in a software application and may be configured to report to the user on the current state of atrial fibrillation (AFIB) and a current trend.
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Citations
26 Claims
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1. A method of detecting atrial fibrillation in a human or animal subject, the method comprising:
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acquiring a plethysmographic waveform of a patient from a monitoring device over a period of time;
measuring a set of pulse intervals from the plethysmographic waveform;
measuring a set of features from the plethysmographic waveform; and
analyzing the set of pulse intervals and the set of pulse features from the plethysmographic waveform to determine an atrial fibrillation state of the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system for detecting atrial fibrillation in a human or animal subject, the system comprising:
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a remote sensing system configured to analyze a plethysmographic waveform from a monitoring device;
a storage media for storing a computer application;
a processing unit coupled to the remote sensing system and the storage media, and configured to execute the computer application, and further configured to receive the plethysmographic waveform from the remote sensing system, wherein when the computer application is executed, a set of pulse intervals from the plethysmographic waveform are detected and a set of pulse features are measured from the plethysmographic waveform, and further wherein the set of pulse intervals and the set of pulse features are analyzed to determine an atrial fibrillation state of the patient. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of detecting atrial fibrillation, the method comprising:
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producing a plethysmographic waveform from a plethysmographic sensor;
detecting a set of pulse intervals from the plethysmographic waveform;
measuring a set of pulse features from the plethysmographic waveform;
analyzing the set of pulse intervals and the set of pulse features from the plethysmographic waveform to determine an atrial fibrillation state of the patient and to detect an atrial fibrillation trend of the patient; and
reporting the atrial fibrillation state and the atrial fibrillation trend to the patient, wherein analyzing the set of pulse intervals includes conducting a hidden Markov model analysis on the set of pulse intervals, and conducting a contextual analysis on the set of pulse intervals, and further wherein analyzing the set of pulse amplitudes includes determining the filling time dynamics of the set of pulse amplitudes, and calculating amplitude variation between each one of the set of pulse amplitudes relative to the mean, the median, consecutive pulses, or maximum to minimum. - View Dependent Claims (26)
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Specification