Detection of Disordered Breathing
First Claim
1. A method of operating a medical device, comprising:
- sensing respiration of a patient and generating a respiration signal;
determining respiration signal characteristics from the respiration signal;
comparing the respiration characteristics to one or more respiration metrics;
sensing non-respiration related artifacts and generating an artifact signal;
sensing one or more sleep-related signals;
comparing at least one sleep related signal to a first sleep threshold, the first sleep threshold adjusted by another sleep related signal;
determining a sleep status of the patient based on comparison of the sleep related signal to the first sleep threshold;
detecting disordered breathing based on the sleep status and comparing the respiration signal characteristics to the respiration metrics;
avoiding erroneous detection of the disordered breathing based on the artifact signal; and
storing historical data related to the disordered breathing in memory of the medical device.
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Accused Products
Abstract
Devices and methods for detecting disordered breathing involve determining that the patient is asleep and sensing one or more signals associated with disordered breathing indicative of sleep-disordered breathing while the patient is asleep. Sleep-disordered breathing is detected using the sensed signals associated with disordered breathing. The sensed signals associated with disordered breathing may also be used to acquire a respiration pattern of one or more respiration cycles. Characteristics of the respiration pattern are determined. The respiration pattern is classified as a disordered breathing episode based on the characteristics of the respiration pattern. One or more processes involved in the detection of disordered breathing are performed using an implantable device.
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Citations
20 Claims
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1. A method of operating a medical device, comprising:
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sensing respiration of a patient and generating a respiration signal; determining respiration signal characteristics from the respiration signal; comparing the respiration characteristics to one or more respiration metrics; sensing non-respiration related artifacts and generating an artifact signal; sensing one or more sleep-related signals; comparing at least one sleep related signal to a first sleep threshold, the first sleep threshold adjusted by another sleep related signal; determining a sleep status of the patient based on comparison of the sleep related signal to the first sleep threshold; detecting disordered breathing based on the sleep status and comparing the respiration signal characteristics to the respiration metrics; avoiding erroneous detection of the disordered breathing based on the artifact signal; and storing historical data related to the disordered breathing in memory of the medical device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of operating a medical device, comprising:
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sensing respiration of a patient and generating a respiration signal; determining tidal volumes and breath intervals from the respiration signal; comparing the tidal volumes and the breath intervals to one or more respiration indices; sensing non-respiration related artifacts and generating an artifact signal; sensing one or more sleep-related signals; comparing at least one sleep related signal to a first sleep threshold; determining a sleep status of the patient based on comparison of the sleep related signal to the first sleep threshold; detecting disordered breathing based on the sleep status and on comparing the tidal volumes and the breath intervals to the respiration indices; and avoiding erroneous detection of the disordered breathing based on the artifact signal, wherein detecting the disordered breathing is performed implantably within the medical device. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method of operating a medical device, comprising:
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sensing respiration of a patient and generating a respiration signal; determining characteristics of the respiration signal; comparing the respiration signal characteristics to one or more respiration indices; sensing non-respiration related artifacts and generating an artifact signal; discriminating between apnea, hypopnea, and mixed apnea and hypopnea disordered breathing episodes based on comparing the respiration signal characteristics to the respiration indices; and avoiding erroneous detection of the disordered breathing based on the artifact signal, wherein discriminating between the apnea, hypopnea, and mixed apnea and hypopnea is performed implantably in the medical device. - View Dependent Claims (18, 19, 20)
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Specification